fontloader-luaotfload (21aug17)

git-svn-id: svn://tug.org/texlive/trunk@45090 c570f23f-e606-0410-a88d-b1316a301751

18 files changed, 91984 insertions, 1 deletions

diff --git a/Master/texmf-dist/doc/luatex/fontloader-luaotfload/README.md b/Master/texmf-dist/doc/luatex/fontloader-luaotfload/README.md
new file mode 100644
index 00000000000..71784a59734
--- /dev/null
+++ b/Master/texmf-dist/doc/luatex/fontloader-luaotfload/README.md
@@ -0,0 +1,25 @@
+# The fontloader-luaotfload package
+
+Additional fontloaders for luaotfload
+
+Version 1.0  Ulrike Fischer 2017-
+
+
+## License
+
+LATEX Project Public License 1.3c.
+
+## Contents
+
+- Readme.md (this file)
+- various fontloader-XXXX.lua files 
+- luaotfload-letterspace.luaX -- and alternative version of luaotfload-letterspace.lua, needed for some of the fontloaders
+- luaotfload.confX -- an example configuration file, rename to luaotfload.conf to use it.
+- fontloader-luaotfload.tex, fontloader-luaotfload.pdf (the docu and example)
+- A number of test-XXX-files
+
+
+## Use and Installation
+
+Read the documentation.
+
diff --git a/Master/texmf-dist/doc/luatex/fontloader-luaotfload/fontloader-luaotfload.pdf b/Master/texmf-dist/doc/luatex/fontloader-luaotfload/fontloader-luaotfload.pdf
new file mode 100644
index 00000000000..ee54df89a1e
--- /dev/null
+++ b/Master/texmf-dist/doc/luatex/fontloader-luaotfload/fontloader-luaotfload.pdf
diff --git a/Master/texmf-dist/doc/luatex/fontloader-luaotfload/fontloader-luaotfload.tex b/Master/texmf-dist/doc/luatex/fontloader-luaotfload/fontloader-luaotfload.tex
new file mode 100644
index 00000000000..07cc8016f79
--- /dev/null
+++ b/Master/texmf-dist/doc/luatex/fontloader-luaotfload/fontloader-luaotfload.tex
@@ -0,0 +1,164 @@
+% !Mode:: "TeX:DE:UTF-8:Main"
+\RequirePackage{luatex85}
+\documentclass[parskip=half-,egregdoesnotlikesansseriftitles]{scrartcl}
+\usepackage{ydoc-code,ydoc-desc}
+\usepackage{fontspec}
+\usepackage[english]{babel}
+\usepackage{csquotes}
+\usepackage{xcolor,listings,enumitem}
+
+\title{The \texttt{fontloader-luaotfload} package}
+\author{Ulrike Fischer\thanks{fischer@troubleshooting-tex.de}}
+\newcommand\package[1]{\texttt{#1}}
+
+
+\begin{document}
+\maketitle
+
+\section{Requirements}
+
+Use a current tex system! The files has been tried with texlive 2017.
+
+\section{Introduction}
+The luatex engine can use open type fonts but -- unlike xetex which has the harfbuzz library built-in  --  it doesn't work with the bare binary but needs additional (lua)-code.
+
+In \LaTeX\ this lua-code is provided by the package \package{luaotfload}. In newer \LaTeX-versions the lua-code of \package{luaotfload} is loaded by the format. So you don't need to load it manually. Even a minimal hello-world-example should show in the log-file
+
+\verb+Lua module: luaotfload-main 2017/01/29 2.80001 OpenType layout system.+
+
+
+
+
+\package{luaotfload} consist of two parts:
+
+\begin{itemize}
+\item The core of the package is the \emph{fontloader} -- the current is \texttt{fontloader-2017-02-11.lua}. The fontloader has been created from a subset of the fontloader code of the Con\TeX{}t format.
+
+\item Around this fontloader \package{luaotfload} contains a number of lua-file needed for the creation of the font name database, the font cache, and some adaptions of the fontloader to the needs of \LaTeX.
+\end{itemize}
+
+\package{luaotfload} has made quite an effort to separate the two parts and since some time it is possible to replace the core fontloader with another (newer) version with the help of a configuration file. This makes it possible e.\,g. to test new features which have been added to Con\TeX{}t.
+
+This package provides a number of such alternative fontloaders.
+
+\emph{Please read the complete documentation before trying to use the fontloaders -- at least read the section \ref{sec:problem} about incompabilities.}
+
+
+\section{Installation}
+
+The package contains
+
+\begin{itemize}
+\item a number of \texttt{fontloader-XXX.lua} files. This files should be in a texmf-tree in  \texttt{../tex/luatex/fontloader-luaotfload} -- probably your tex system installed them there already.
+
+\item all the other files are either examples or documentation and should go in the \texttt{doc}-folder.
+\end{itemize}
+
+\section{Using the fontloader(s)}
+
+To use one of the alternative fontloader you must create a \texttt{luaotfload.conf} file.  This file should be in the normal search path, e.g. in the folder of your document or in some texmf-tree, there at best in  the branch \texttt{tex/luatex}.
+
+Such a \texttt{luaotfload.conf} looks e.\,g. like this:
+
+\lstinputlisting[columns=flexible,basicstyle=\ttfamily]{luaotfload.conf}
+
+\begin{itemize}
+\item The fontloader section starts with \texttt[run].
+\item The semicolon starts a comment. So in the example \texttt{fontloader-reference-2017-07-28.lua} is the active fontloader. If you comment all fontloaders \package{luaotfload} will use its default loader.
+\item The shortcuts \texttt{default} loads the default fontloader of \package{luaotfload} and \texttt{reference} its reference version (see below for an explanation about the reference fontloader).
+\item The last active entry wins!
+\item It is possible to use absolute pathes, but how exactly is rather system dependant, so you will have to try.
+\end{itemize}
+
+\section{General description of the fontloaders}
+
+Fontloaders come in two flavors: I will call them \emph{reference type} and \emph{luaotfload type}.
+
+The \emph{reference type} is a copy from a \texttt{luatex-fonts-merged.lua} from a context installation. This file is -- as the name indicates -- a merge of the generic part of the context fontloader files. It is normally present in a context minimals installation, or can be created by running in the folder which contains \texttt{luatex-fonts.lua} the command:
+
+\begin{lstlisting}
+mtxrun --script package --merge ./luatex-fonts.lua
+\end{lstlisting}
+
+The \emph{luaotfload type} is created by a script call \texttt{mkimport} which you can find on the github site of \package{luaotfload}. It also uses the context files but ignores some that are present in the lualibs packages and it also does some other adaptions.
+
+The original \package{luaotfload} already contains both types of fontloaders, the reference type is \texttt{fontloader-reference.lua} -- it can be chosen in the configuration file with the keyword \texttt{reference} -- and the luaotfload type is \texttt{fontloader-2017-02-11-lua}.
+
+I have no idea about the pros and cons of both types. On the whole I would have preferred to build  luaotfload type fontloaders as they are nearer to the current default fontloader. But sadly it didn't work: I could adapt the pathes in \texttt{mkimport} to my system and build a fontloader but it wasn't usable.
+The \emph{reference type} are perhaps slower and there is the possibility that they contain code which could clash with some lua libraries loaded by other \LaTeX packages. But until now they seemed to work.
+
+For both types there is the danger that fontloaders created with files from a newer context version clash with the older wrapper code of luaotfload -- and actually this already happened, see the following section.
+
+
+
+\section{Incompabilities with the \package{luaotfload} \enquote{wrapper} files}\label{sec:problem}
+
+As mentioned in the previous section it is always possible that newer versions of the core fontloader are no longer compatible to the wrapper files from \package{luaotfload}. If you try out \texttt{fontloader-reference-2017-07-28.lua} you will get a lua error:
+
+\begin{verbatim}
+luaotfload | load : FATAL ERROR
+luaotfload | load : Failed to load module "luaotfload-letterspace.lua".
+luaotfload | load : Error message:
+luaotfload | load : "...mf-dist/tex/luatex/luaotfload/luaotfload-letterspace.lua:73: 
+                   attempt to index local 'nodepool' (a nil value)".
+\end{verbatim}
+
+The reason is that \texttt{luaotfload-letterspace.lua} tries to access a table value that no longer exists. Imho it is not possible to solve this problem without changing the original file. This is absolutly not to my liking but as I don't see another way I offer a patched version. If you want to use the newer fontloader versions you will have to do this:
+
+In the documentation folder of this package there is a file \texttt{luaotfload-letterspace.luax}. Change the extension to \texttt{lua} and copy the file to your document folder or in a \emph{local} texmf tree to \texttt{tex/luatex/luaotfload} -- in the second case don't forget to update your file name database (FNDB): in miktex with \texttt{initexmf -u} and in texlive with \texttt{mktexlsr}.
+
+Try out a small lualatex document. If the log-file tells you
+
+\verb+ !!!!! UF: Using CHANGED luaotfload-letterspace 2017-07-14 !!!!!+
+
+then the new \texttt{lua}-file is used. \textbf{Don't forget that this patched file is in your system! When luaotfload is updated you should remove it.}
+
+\section{The list of new fontloaders}
+
+Currently there are only three fontloaders. But I plan to add more if some changes are made to the context files.
+
+Fontloaders with * before their name need the adapted \texttt{luaotfload-letterspace.lua} as described in the last section.
+
+\begin{description}[font=\texttt]
+  \item[fontloader-2017-02-11-stix.lua] This fontloader is the original luaotfload-type fontloader where one section  -- from \texttt{font-oto.lua} -- has been replaced to get around a bug in the stix fonts with wrong parenthese sizes. See \texttt{test-fontloader-2017-02-11-stix.tex}.
+
+  \item[*fontloader-reference-2017-07-28.lua] This is a reference-type fontloader which has been created on 2017-07-28. It adds the capability to add ligatures with \enquote{word boundaries}. See \texttt{test-fontloader-2017-07-28.tex}.
+  
+  \item[*fontloader-reference-2017-08-18.lua] This is a reference-type fontloader which I added when I tried out to color the cow fonts: See \url{https://tex.stackexchange.com/a/387069/2388}  and 
+      \texttt{test-fontloader-2017-08-18.tex}.
+      
+\end{description}
+
+
+\section{Using newer luatex versions}
+
+As mentioned in the tex.stackexchange answer about the colored cow fonts, the solution needs a newer luatex. While \texttt{fontloader-reference-2017-08-18.lua} in itself seems to work fine with the luatex of TeXlive 2017, trying to use the \texttt{colr} font feature, leads to the error
+
+  \verb+! error:  (vf command): unknown packet command+ 
+  
+So here a description how I did setup my windows system to allow tests with a newer luatex without disturbing my standard system:
+
+\begin{enumerate}
+\item I created a folder \texttt{.../texlive/2017/bin-dev} beside the standard \texttt{bin}-folder. 
+\item In this \texttt{bin-dev}-folder I copied the whole \texttt{win32} from the \texttt{bin}-folder.
+\item I got \texttt{luatex-dev-w32.tar.xz} from \texttt{http://w32tex.org/} and copied the included \texttt{luatex.dll} and \texttt{lua52.dll} to the \texttt{bin-dev/win32}-folder.
+    
+\item In the  \texttt{bin-dev/win32}-folder I created a \texttt{texmf.cnf}-file with the line
+
+   \verb+ TEXMFSYSVAR = $TEXMFROOT/texmf-var-dev+
+   
+\item Then I changed the windows \texttt{PATH}-variable and added the path to \texttt{.../bin-dev/win32;} at the begin.
+    
+\item As a last step I called on a command \verb+fmtutil-sys --all+. This creates the formats in a new  \texttt{texmf-var-dev} tree beside the standard \texttt{texmf-var}. 
+\end{enumerate}   
+
+With this installation it is possible to switch between the normal texlive and the one with the development luatex simply by changing the windows PATH variable. 
+
+
+
+
+
+\end{document}
+
+
+
diff --git a/Master/texmf-dist/doc/luatex/fontloader-luaotfload/luaotfload-letterspace.luax b/Master/texmf-dist/doc/luatex/fontloader-luaotfload/luaotfload-letterspace.luax
new file mode 100644
index 00000000000..df93dbe1b70
--- /dev/null
+++ b/Master/texmf-dist/doc/luatex/fontloader-luaotfload/luaotfload-letterspace.luax
@@ -0,0 +1,683 @@
+if not modules then modules = { } end modules ['letterspace'] = {
+    version   = "2.8",
+    comment   = "companion to luaotfload-main.lua",
+    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL; adapted by Philipp Gesang",
+    copyright = "PRAGMA ADE / ConTeXt Development Team",
+    license   = "see context related readme files"
+}
+
+--- This code diverged quite a bit from its origin in Context. Please
+--- do *not* report bugs on the Context list.
+
+local log                = luaotfload.log
+local logreport          = log.report
+
+-- UF
+texio.write_nl ("------------------")
+texio.write_nl ("!!!!! UF: Using CHANGED luaotfload-letterspace 2017-07-14 !!!!!")
+texio.write_nl ("------------------")
+-- /UF
+
+local getmetatable       = getmetatable
+local require            = require
+local setmetatable       = setmetatable
+local tonumber           = tonumber
+
+local next               = next
+local nodes, node, fonts = nodes, node, fonts
+
+local nodedirect         = nodes.nuts
+
+local getfield           = nodedirect.getfield
+local setfield           = nodedirect.setfield
+
+local field_setter = function (name) return function (n, ...) setfield (n, name, ...) end end
+local field_getter = function (name) return function (n, ...) getfield (n, name, ...) end end
+
+local getfont            = nodedirect.getfont
+local getid              = nodedirect.getid
+
+local getnext            = nodedirect.getnext or field_getter "next"
+local setnext            = nodedirect.setnext or field_setter "next"
+
+local getprev            = nodedirect.getprev or field_getter "prev"
+local setprev            = nodedirect.setprev or field_setter "prev"
+
+--- since r5336
+local getboth            = nodedirect.getboth or function (n)
+  return getprev (n), getnext (n)
+end
+
+local setlink            = nodedirect.setlink or function (a, b)
+  setnext (a, b)
+  setprev (b, a)
+end
+
+local getdisc            = nodedirect.getdisc or field_getter "disc"
+local setdisc            = nodedirect.setdisc or field_setter "disc"
+
+local getsubtype         = nodedirect.getsubtype or field_getter "subtype"
+local setsubtype         = nodedirect.setsubtype or field_setter "subtype"
+
+local getchar            = nodedirect.getchar or field_getter "subtype"
+local setchar            = nodedirect.setchar or field_setter "subtype"
+
+local find_node_tail     = nodedirect.tail
+local todirect           = nodedirect.tonut
+local tonode             = nodedirect.tonode
+
+local insert_node_before = nodedirect.insert_before
+local free_node          = nodedirect.free -- may cause double free
+local free_node          = function (n)
+  logreport ("term", 5, "letterspace", "not calling free_node(%d)", n)
+  -- free_node (n)
+end
+local copy_node          = nodedirect.copy
+local new_node           = nodedirect.new
+
+local nodepool           = nodedirect.pool
+-- local new_kern           = nodepool.kern -- UF removed 2017-07-14
+
+local nodecodes          = nodes.nodecodes
+
+local glyph_code         = nodecodes.glyph
+local kern_code          = nodecodes.kern
+local disc_code          = nodecodes.disc
+local math_code          = nodecodes.math
+local glue_code          = nodecodes.glue
+
+local fonthashes         = fonts.hashes
+local chardata           = fonthashes.characters
+local quaddata           = fonthashes.quads
+local otffeatures        = fonts.constructors.newfeatures "otf"
+
+--[[doc--
+
+  Since the letterspacing method was derived initially from Context’s
+  typo-krn.lua we keep the sub-namespace “letterspace” inside the
+  “luaotfload” table.
+
+--doc]]--
+
+luaotfload.letterspace   = luaotfload.letterspace or { }
+local letterspace        = luaotfload.letterspace
+
+letterspace.keepligature = false
+letterspace.keeptogether = false
+
+---=================================================================---
+---                     preliminary definitions
+---=================================================================---
+-- We set up a layer emulating some Context internals that are needed
+-- for the letterspacing callback.
+-----------------------------------------------------------------------
+--- node-ini
+-----------------------------------------------------------------------
+
+local bothways  = function (t) return table.swapped (t, t) end
+local kerncodes = bothways { [0] = "fontkern"
+                           , [1] = "userkern"
+                           , [2] = "accentkern"
+                           }
+local skipcodes = bothways {  [0] = "userskip"
+                           , [13] = "spaceskip"
+                           , [14] = "xspaceskip"
+                           }
+
+kerncodes.kerning       = kerncodes.fontkern --- idiosyncrasy
+local kerning_code      = kerncodes.kerning
+local userkern_code     = kerncodes.userkern
+local userskip_code     = skipcodes.userskip
+local spaceskip_code    = skipcodes.spaceskip
+local xspaceskip_code   = skipcodes.xspaceskip
+
+-----------------------------------------------------------------------
+--- node-res
+-----------------------------------------------------------------------
+
+local glue_spec   = new_node "glue_spec"
+
+local new_gluespec = function (width,
+                               stretch,       shrink,
+                               stretch_order, shrink_order)
+  local spec = copy_node(glue_spec)
+  if width         then setfield(spec, "width"        , width        )  end
+  if stretch       then setfield(spec, "stretch"      , stretch      )  end
+  if shrink        then setfield(spec, "shrink"       , shrink       )  end
+  if stretch_order then setfield(spec, "stretch_order", stretch_order)  end
+  if shrink_order  then setfield(spec, "shrink_order" , shrink_order )  end
+  return spec
+end
+
+local new_glue = function (width, stretch, shrink,
+                           stretch_order, shrink_order)
+  local n = new_node "glue"
+  if not width then return n end
+    -- no spec
+  if width == false then
+    local width = tonumber(width)
+    if width then
+      setfield(n, "spec",
+               new_gluespec(width, stretch, shrink,
+                            stretch_order, shrink_order))
+    end
+  else
+    -- shared
+    setfield(n, "spec", copy_node(width))
+  end
+  return n
+end
+
+-----------------------------------------------------------------------
+--- font-hsh
+-----------------------------------------------------------------------
+--- some initialization resembling font-hsh
+local fonthashes         = fonts.hashes
+local identifiers        = fonthashes.identifiers --- was: fontdata
+local chardata           = fonthashes.characters
+local quaddata           = fonthashes.quads
+local parameters         = fonthashes.parameters
+
+--- ('a, 'a) hash -> (('a, 'a) hash -> 'a -> 'a) -> ('a, 'a) hash
+local setmetatableindex = function (t, f)
+  local mt = getmetatable(t)
+  if mt then
+    mt.__index = f
+  else
+    setmetatable(t, { __index = f })
+  end
+  return t
+end
+
+if not parameters then
+  parameters = { }
+  setmetatableindex(parameters, function(t, k)
+    if k == true then
+      return parameters[currentfont()]
+    else
+      local parameters = identifiers[k].parameters
+      t[k] = parameters
+      return parameters
+    end
+  end)
+  --fonthashes.parameters = parameters
+end
+
+if not chardata then
+  chardata = { }
+  setmetatableindex(chardata, function(t, k)
+    if k == true then
+      return chardata[currentfont()]
+    else
+      local tfmdata = identifiers[k]
+      if not tfmdata then --- unsafe
+        tfmdata = font.fonts[k]
+      end
+      if tfmdata then
+        local characters = tfmdata.characters
+        t[k] = characters
+        return characters
+      end
+    end
+  end)
+  fonthashes.characters = chardata
+end
+
+if not quaddata then
+  quaddata = { }
+  setmetatableindex(quaddata, function(t, k)
+    if k == true then
+      return quads[currentfont()]
+    else
+      local parameters = parameters[k]
+      local quad = parameters and parameters.quad or 0
+      t[k] = quad
+      return quad
+    end
+  end)
+  --fonthashes.quads = quaddata
+end
+
+---=================================================================---
+---                 character kerning functionality
+---=================================================================---
+
+-- UF changed 2017-07-14
+local newUF = node.direct.new
+
+local kern_injector = function (fillup, kern)
+ if fillup then
+   local g = newUF("glue")
+   setfield(g, "stretch", kern)
+   setfield(g, "stretch_order", 1)
+   return g
+ end
+   local g = newUF("kern")
+   setfield(g,"kern",kern)
+   return g
+end
+-- /UF
+
+local kernable_skip = function (n)
+  local st = getsubtype (n)
+  return st == userskip_code
+      or st == spaceskip_code
+      or st == xspaceskip_code
+end
+
+local function spec_injector (fillup, width, stretch, shrink)
+  if fillup then
+    local spec = new_gluespec(width, 2 * stretch, 2 * shrink)
+    setfield(spec, "stretch_order", 1)
+    return spec
+  end
+  return new_gluespec(width,stretch,shrink)
+end
+
+--[[doc--
+
+    Caveat lector.
+    This is an adaptation of the Context character kerning mechanism
+    that emulates XeTeX-style fontwise letterspacing. Note that in its
+    present state it is far inferior to the original, which is
+    attribute-based and ignores font-boundaries. Nevertheless, due to
+    popular demand the following callback has been added.
+
+--doc]]--
+
+local kernfactors = { } --- fontid -> factor
+
+local kerncharacters
+kerncharacters = function (head)
+  local start         = head
+  local lastfont      = nil
+  local keepligature  = letterspace.keepligature --- function
+  local keeptogether  = letterspace.keeptogether --- function
+  local fillup        = false
+
+  local identifiers   = fonthashes.identifiers
+  local kernfactors   = kernfactors
+  local firstkern     = true
+
+  while start do
+    local id = getid(start)
+    if id == glyph_code then
+      --- 1) look up kern factor (slow, but cached rudimentarily)
+      local krn
+      local fontid = getfont(start)
+      do
+        krn = kernfactors[fontid]
+        if not krn then
+          local tfmdata = identifiers[fontid]
+          if not tfmdata then -- unsafe
+            tfmdata = font.fonts[fontid]
+          end
+          if tfmdata then
+            fontproperties = tfmdata.properties
+            if fontproperties then
+              krn = fontproperties.kerncharacters
+            end
+          end
+          kernfactors[fontid] = krn
+        end
+        if not krn or krn == 0 then
+          firstkern = true
+          goto nextnode
+        elseif firstkern then
+          firstkern = false
+          if (id ~= disc_code) and (not getfield(start, "components")) then
+            --- not a ligature, skip node
+            goto nextnode
+          end
+        end
+      end
+
+      if krn == "max" then
+        krn = .25
+        fillup = true
+      else
+        fillup = false
+      end
+
+      lastfont = fontid
+
+      --- 2) resolve ligatures
+      local c = getfield(start, "components")
+
+      if c then
+        if keepligature and keepligature(start) then
+          -- keep 'm
+          c = nil
+        else
+          while c do
+            local s = start
+            local p, n = getboth (s)
+            if p then
+              setlink (p, c)
+            else
+              head = c
+            end
+            if n then
+              local tail = find_node_tail(c)
+              setlink (tail, n)
+            end
+            start = c
+            setfield(s, "components", nil)
+            free_node(s) --> double free with multipart components
+            c = getfield (start, "components")
+          end
+        end
+      end -- kern ligature
+
+      --- 3) apply the extra kerning
+      local prev = getprev(start)
+      if prev then
+        local pid = getid(prev)
+
+        if not pid then
+          -- nothing
+
+        elseif pid == glue_code and kernable_skip(prev) then
+          local spec = getfield(prev, "spec")
+          local wd   = getfield(spec, "width")
+          if wd > 0 then
+            --- formula taken from Context
+            ---      existing_width extended by four times the
+            ---      width times the font’s kernfactor
+            local newwd     = wd + --[[two en to a quad]] 4 * wd * krn
+            local stretched = (getfield(spec,"stretch") * newwd) / wd
+            local shrunk    = (getfield(spec,"shrink")  * newwd) / wd
+            setfield(prev, "spec",
+                     spec_injector(fillup, newwd, stretched, shrunk))
+          end
+
+        elseif pid == kern_code then
+          local prev_subtype = getsubtype(prev)
+          if prev_subtype == kerning_code   --- context does this by means of an
+          or prev_subtype == userkern_code  --- attribute; we may need a test
+          then
+
+            local pprev    = getprev(prev)
+            local pprev_id = getid(pprev)
+
+            if    keeptogether
+              and pprev_id == glyph_code
+              and keeptogether(pprev, start)
+            then
+              -- keep
+            else
+              setsubtype (prev, userkern_code)
+              local prev_kern = getfield(prev, "kern")
+              prev_kern = prev_kern + quaddata[lastfont] * krn
+              setfield (prev, "kern", prev_kern)
+            end
+          end
+
+        elseif pid == glyph_code then
+          if getfont(prev) == lastfont then
+            local prevchar = getchar(prev)
+            local lastchar = getchar(start)
+            if keeptogether and keeptogether(prev, start) then
+              -- keep 'm
+            elseif identifiers[lastfont] then
+              local lastfontchars = chardata[lastfont]
+              if lastfontchars then
+                local prevchardata  = lastfontchars[prevchar]
+                if not prevchardata then
+                  --- font doesn’t contain the glyph
+                else
+                  local kern = 0
+                  local kerns = prevchardata.kerns
+                  if kerns then kern = kerns[lastchar] or kern end
+                  krn = kern + quaddata[lastfont]*krn -- here
+                  insert_node_before(head,start,kern_injector(fillup,krn))
+                end
+              end
+            end
+          else
+            krn = quaddata[lastfont]*krn -- here
+            insert_node_before(head,start,kern_injector(fillup,krn))
+          end
+
+        elseif pid == disc_code then
+          local disc = prev -- disc
+          local pre, post, replace = getdisc (disc)
+          local prv = getprev(disc)
+          local nxt = getnext(disc)
+
+          if pre and prv then -- must pair with start.prev
+            -- this one happens in most cases
+            local before = copy_node(prv)
+            setprev(pre,    before)
+            setnext(before, pre)
+            setprev(before, nil)
+            pre = kerncharacters (before)
+            pre = getnext(pre)
+            setprev(pre, nil)
+            setfield(disc, "pre", pre)
+            free_node(before)
+          end
+
+          if post and nxt then  -- must pair with start
+            local after = copy_node(nxt)
+            local tail = find_node_tail(post)
+            setnext(tail,  after)
+            setprev(after, tail)
+            setnext(after, nil)
+            post = kerncharacters (post)
+            setnext(tail, nil)
+            setfield(disc, "post", post)
+            free_node(after)
+          end
+
+          if replace and prv and nxt then -- must pair with start and start.prev
+            local before = copy_node(prv)
+            local after = copy_node(nxt)
+            local tail = find_node_tail(replace)
+            setprev(replace, before)
+            setnext(before,  replace)
+            setprev(before,  nil)
+            setnext(tail,    after)
+            setprev(after,   tail)
+            setnext(after,   nil)
+            replace = kerncharacters (before)
+            replace = getnext(replace)
+            setprev(replace, nil)
+            setnext(getprev(after), nil)
+            setfield(disc, "replace",   replace)
+            free_node(after)
+            free_node(before)
+
+          elseif identifiers[lastfont] then
+            if    prv
+              and getid(prv)   == glyph_code
+              and getfont(prv) == lastfont
+            then
+              local kern     = 0
+              local prevchar = getchar(prv)
+              local lastchar = getchar(start)
+              local lastfontchars = chardata[lastfont]
+              if lastfontchars then
+                local prevchardata = lastfontchars[prevchar]
+                if not prevchardata then
+                  --- font doesn’t contain the glyph
+                else
+                  local kerns = prevchardata.kerns
+                  if kerns then kern = kerns[lastchar] or kern end
+                end
+              end
+              krn = kern + quaddata[lastfont]*krn -- here
+            else
+              krn = quaddata[lastfont]*krn -- here
+            end
+            setfield(disc, "replace", kern_injector(false, krn))
+          end --[[if replace and prv and nxt]]
+        end --[[if not pid]]
+      end --[[if prev]]
+    end --[[if id == glyph_code]]
+
+    ::nextnode::
+    if start then
+      start = getnext(start)
+    end
+  end
+  return head
+end
+
+---=================================================================---
+---                         integration
+---=================================================================---
+
+--- · callback:     kerncharacters
+--- · enabler:      enablefontkerning
+--- · disabler:     disablefontkerning
+
+--- callback wrappers
+
+--- (node_t -> node_t) -> string -> string list -> bool
+local registered_as = { } --- procname -> callbacks
+local add_processor = function (processor, name, ...)
+  local callbacks = { ... }
+  for i=1, #callbacks do
+    luatexbase.add_to_callback(callbacks[i], processor, name)
+  end
+  registered_as[name] = callbacks --- for removal
+  return true
+end
+
+--- string -> bool
+local remove_processor = function (name)
+  local callbacks = registered_as[name]
+  if callbacks then
+    for i=1, #callbacks do
+      luatexbase.remove_from_callback(callbacks[i], name)
+    end
+    return true
+  end
+  return false --> unregistered
+end
+
+--- When font kerning is requested, usually by defining a font with the
+--- ``letterspace`` parameter, we inject a wrapper for the
+--- ``kerncharacters()`` node processor in the relevant callbacks. This
+--- wrapper initially converts the received head node into its “direct”
+--- counterpart. Likewise, the callback result is converted back to an
+--- ordinary node prior to returning. Internally, ``kerncharacters()``
+--- performs all node operations on direct nodes.
+
+--- unit -> bool
+local enablefontkerning = function ( )
+
+  local handler = function (hd)
+    local direct_hd = todirect (hd)
+    logreport ("term", 5, "letterspace",
+               "kerncharacters() invoked with node.direct interface \z
+               (``%s`` -> ``%s``)", tostring (hd), tostring (direct_hd))
+    local direct_hd = kerncharacters (direct_hd)
+    if not direct_hd then --- bad
+      logreport ("both", 0, "letterspace",
+                 "kerncharacters() failed to return a valid new head")
+    end
+    return tonode (direct_hd)
+  end
+
+  return add_processor( handler
+                      , "luaotfload.letterspace"
+                      , "pre_linebreak_filter"
+                      , "hpack_filter")
+end
+
+--- unit -> bool
+---al disablefontkerning = function ( )
+---eturn remove_processor "luaotfload.letterspace"
+---
+
+--[[doc--
+
+  Fontwise kerning is enabled via the “kernfactor” option at font
+  definition time. Unlike the Context implementation which relies on
+  Luatex attributes, it uses a font property for passing along the
+  letterspacing factor of a node.
+
+  The callback is activated the first time a letterspaced font is
+  requested and stays active until the end of the run. Since the font
+  is a property of individual glyphs, every glyph in the entire
+  document must be checked for the kern property. This is quite
+  inefficient compared to Context’s attribute based approach, but Xetex
+  compatibility reduces our options significantly.
+
+--doc]]--
+
+
+local fontkerning_enabled = false --- callback state
+
+--- fontobj -> float -> unit
+local initializefontkerning = function (tfmdata, factor)
+  if factor ~= "max" then
+    factor = tonumber (factor) or 0
+  end
+  if factor == "max" or factor ~= 0 then
+    local fontproperties = tfmdata.properties
+    if fontproperties then
+      --- hopefully this field stays unused otherwise
+      fontproperties.kerncharacters = factor
+    end
+    if not fontkerning_enabled then
+      fontkerning_enabled = enablefontkerning ()
+    end
+  end
+end
+
+--- like the font colorization, fontwise kerning is hooked into the
+--- feature mechanism
+
+otffeatures.register {
+  name        = "kernfactor",
+  description = "kernfactor",
+  initializers = {
+    base = initializefontkerning,
+    node = initializefontkerning,
+  }
+}
+
+--[[doc--
+
+  The “letterspace” feature is essentially identical with the above
+  “kernfactor” method, but scales the factor to percentages to match
+  Xetex’s behavior. (See the Xetex reference, page 5, section 1.2.2.)
+
+  Since Xetex doesn’t appear to have a (documented) “max” keyword, we
+  assume all input values are numeric.
+
+--doc]]--
+
+local initializecompatfontkerning = function (tfmdata, percentage)
+  local factor = tonumber (percentage)
+  if not factor then
+    logreport ("both", 0, "letterspace",
+               "Invalid argument to letterspace: %s (type %q), " ..
+               "was expecting percentage as Lua number instead.",
+               percentage, type (percentage))
+    return
+  end
+  return initializefontkerning (tfmdata, factor * 0.01)
+end
+
+otffeatures.register {
+  name        = "letterspace",
+  description = "letterspace",
+  initializers = {
+    base = initializecompatfontkerning,
+    node = initializecompatfontkerning,
+  }
+}
+
+--[[example--
+
+See https://bitbucket.org/phg/lua-la-tex-tests/src/tip/pln-letterspace-8-compare.tex
+for an example.
+
+--example]]--
+
+--- vim:sw=2:ts=2:expandtab:tw=71
+
diff --git a/Master/texmf-dist/doc/luatex/fontloader-luaotfload/luaotfload.confx b/Master/texmf-dist/doc/luatex/fontloader-luaotfload/luaotfload.confx
new file mode 100644
index 00000000000..4cf5302ce6e
--- /dev/null
+++ b/Master/texmf-dist/doc/luatex/fontloader-luaotfload/luaotfload.confx
@@ -0,0 +1,8 @@
+[run]
+;fontloader = reference;
+;fontloader = default;
+;fontloader = context;
+;fontloader = fontloader-reference-2017-07-28.lua;
+fontloader  = fontloader-reference-2017-08-18.lua;
+;fontloader = fontloader-2017-02-11-stix.lua;
+
diff --git a/Master/texmf-dist/doc/luatex/fontloader-luaotfload/test-fontloader-2017-02-11-stix.pdf b/Master/texmf-dist/doc/luatex/fontloader-luaotfload/test-fontloader-2017-02-11-stix.pdf
new file mode 100644
index 00000000000..6df2feb9855
--- /dev/null
+++ b/Master/texmf-dist/doc/luatex/fontloader-luaotfload/test-fontloader-2017-02-11-stix.pdf
diff --git a/Master/texmf-dist/doc/luatex/fontloader-luaotfload/test-fontloader-2017-02-11-stix.tex b/Master/texmf-dist/doc/luatex/fontloader-luaotfload/test-fontloader-2017-02-11-stix.tex
new file mode 100644
index 00000000000..6b41d21fab6
--- /dev/null
+++ b/Master/texmf-dist/doc/luatex/fontloader-luaotfload/test-fontloader-2017-02-11-stix.tex
@@ -0,0 +1,15 @@
+% !Mode:: "TeX:UTF-8:Main"
+% to avoid the bug: use  fontloader 2017-02-11-stix or later
+
+\documentclass{article}
+
+\usepackage{unicode-math}
+\setmathfont{STIX2Math.otf}
+
+\begin{document}
+$\left(\frac{\frac{a}{b}}{\frac{a}{b}}\right)$
+\qquad
+$a^{\left(\frac{\frac{a}{b}}{\frac{a}{b}}\right)}$ %wrong size of parentheses
+
+
+\end{document}
diff --git a/Master/texmf-dist/doc/luatex/fontloader-luaotfload/test-fontloader-2017-07-28.pdf b/Master/texmf-dist/doc/luatex/fontloader-luaotfload/test-fontloader-2017-07-28.pdf
new file mode 100644
index 00000000000..2129efe108a
--- /dev/null
+++ b/Master/texmf-dist/doc/luatex/fontloader-luaotfload/test-fontloader-2017-07-28.pdf
diff --git a/Master/texmf-dist/doc/luatex/fontloader-luaotfload/test-fontloader-2017-07-28.tex b/Master/texmf-dist/doc/luatex/fontloader-luaotfload/test-fontloader-2017-07-28.tex
new file mode 100644
index 00000000000..5750fa345c7
--- /dev/null
+++ b/Master/texmf-dist/doc/luatex/fontloader-luaotfload/test-fontloader-2017-07-28.tex
@@ -0,0 +1,127 @@
+% !Mode:: "TeX:UTF-8:Main"
+%needs a fontloader 2017-07-28 or later
+%substitutions at word boundaries
+
+\documentclass{article}
+
+\usepackage{luacode,fontspec}
+\begin{luacode*}
+     fonts.handlers.otf.addfeature {
+         name    = "test-a",
+         type    = "chainsubstitution",
+         lookups = {
+             {
+                 type = "substitution",
+                 data = {
+                     ["a"] = "A",
+                     ["b"] = "B",
+                     ["c"] = "C",
+                     ["d"] = "D",
+                 },
+             },
+             {
+                 type = "ligature",
+                 data = {
+                     ['1'] = { "a", "b" },
+                     ['2'] = { "c", "d" },
+                 },
+             },
+         },
+         data = {
+             rules = {
+                 {
+                     before  = { { " ", 0xFFFC } },
+                     current = { { "a" }, { "b" } },
+                     lookups = { 2 },
+                 },
+                 {
+                     current = { { "c" }, { "d" } },
+                     after   = { { 0xFFFC, " " } },
+                     lookups = { 2 },
+                 },
+                 {
+                     current = { { "a" } },
+                     after   = { { "b" } },
+                     lookups = { 1 },
+                 },
+                 {
+                     current = { { "c" } },
+                     after   = { { "d" } },
+                     lookups = { 1 },
+                 },
+             },
+         },
+     }
+
+     fonts.handlers.otf.addfeature {
+         name    = "test-b",
+         type    = "chainsubstitution",
+         lookups = {
+             {
+                 type = "ligature",
+                 data = {
+                     ['1'] = { "a", "b" },
+                     ['2'] = { "c", "d" },
+                 },
+             },
+         },
+         data = {
+             rules = {
+                 {
+                     -- the space is redundant as 0xFFFC contains it
+                     before  = { { " ", 0xFFFC } },
+                     current = { { "a" }, { "b" } },
+                     lookups = { 1 },
+                 },
+                 {
+                     current = { { "c" }, { "d" } },
+                     -- the space is redundant as 0xFFFC contains it
+                     after   = { { 0xFFFC, " " } },
+                     lookups = { 1 },
+                 },
+             },
+         },
+     }
+
+     fonts.handlers.otf.addfeature {
+         name    = "test-c",
+         type    = "chainsubstitution",
+         lookups = {
+             {
+                 type = "ligature",
+                 data = {
+                     ['1'] = { "a", "b" },
+                     ['2'] = { "c", "d" },
+                 },
+             },
+         },
+         data = {
+             rules = {
+                 {
+                     before  = { { " " } },
+                     current = { { "a" }, { "b" } },
+                     lookups = { 1 },
+                 },
+                 {
+                     current = { { "c" }, { "d" } },
+                     after   = { { " " } },
+                     lookups = { 1 },
+                 },
+             },
+         },
+     }
+\end{luacode*}
+
+
+\setmainfont{Arial}[RawFeature=+test-a;]
+
+\begin{document}
+Substitutions at word boundaries (spaces):
+
+ab ab abxcd abxcdcdcd
+
+expected output:
+
+1 1 1x2 1xCdCd2
+
+\end{document} 
\ No newline at end of file
diff --git a/Master/texmf-dist/doc/luatex/fontloader-luaotfload/test-fontloader-2017-08-18.pdf b/Master/texmf-dist/doc/luatex/fontloader-luaotfload/test-fontloader-2017-08-18.pdf
new file mode 100644
index 00000000000..3492594cabf
--- /dev/null
+++ b/Master/texmf-dist/doc/luatex/fontloader-luaotfload/test-fontloader-2017-08-18.pdf
diff --git a/Master/texmf-dist/doc/luatex/fontloader-luaotfload/test-fontloader-2017-08-18.tex b/Master/texmf-dist/doc/luatex/fontloader-luaotfload/test-fontloader-2017-08-18.tex
new file mode 100644
index 00000000000..1cdb8eeb5ec
--- /dev/null
+++ b/Master/texmf-dist/doc/luatex/fontloader-luaotfload/test-fontloader-2017-08-18.tex
@@ -0,0 +1,26 @@
+% !Mode:: "TeX:UTF-8:Main"
+%needs a fontloader 2017-08-18 or later **and** a luatex 1.06!!!
+
+\documentclass{article}
+
+
+\directlua{fonts.handlers.otf.registerpalette("demo", {
+        { g = 0 },
+        { g = 0.5, b=0, r=1 },
+        { r = 1  },
+        { r = 0, b= 1, g= 0},
+    }
+    )}
+
+
+\begin{document}
+\font\Emoj={file:seguiemj.ttf:mode=node;colr=yes;}
+     \Emoj \char"2661 \char"1F34D \char"1F986
+     
+\font\Emoj={file:seguiemj.ttf:mode=node;colr=demo;}
+     \Emoj \char"2661 \char"1F34D \char"1F986
+
+\font\cow={file:koeielettersot.ttf:mode=node;colr=demo;} at 30pt
+    \cow ABC
+
+\end{document} 
\ No newline at end of file
diff --git a/Master/texmf-dist/tex/luatex/fontloader-luaotfload/fontloader-2017-02-11-stix.lua b/Master/texmf-dist/tex/luatex/fontloader-luaotfload/fontloader-2017-02-11-stix.lua
new file mode 100644
index 00000000000..eef6732d823
--- /dev/null
+++ b/Master/texmf-dist/tex/luatex/fontloader-luaotfload/fontloader-2017-02-11-stix.lua
@@ -0,0 +1,21882 @@
+--[[info-----------------------------------------------------------------------
+  Luaotfload fontloader package
+  build 2017-02-11 18:16:05 by phg@phlegethon
+-------------------------------------------------------------------------------
+-- UF
+texio.write_nl ("------------------")
+texio.write_nl ("!!!!! UF: this fontloader uses an experimental font-oto.lua")
+texio.write_nl ("------------------")
+-- /UF
+
+
+2017-07-14: UF exchanged font-oto-part to get around stix2 bug.
+
+  © 2017 PRAGMA ADE / ConTeXt Development Team
+
+  The code in this file is provided under the GPL v2.0 license. See the
+  file COPYING in the Luaotfload repository for details.
+
+  Report bugs to github.com/lualatex/luaotfload
+
+  This file has been assembled from components taken from Context. See
+  the Luaotfload documentation for details:
+
+      $ texdoc luaotfload
+      $ man 1 luaotfload-tool
+      $ man 5 luaotfload.conf
+
+  Included files:
+
+    · fontloader-data-con.lua
+    · fontloader-basics-nod.lua
+    · fontloader-font-ini.lua
+    · fontloader-font-con.lua
+    · fontloader-fonts-enc.lua
+    · fontloader-font-cid.lua
+    · fontloader-font-map.lua
+    · fontloader-font-oti.lua
+    · fontloader-font-otr.lua
+    · fontloader-font-cff.lua
+    · fontloader-font-ttf.lua
+    · fontloader-font-dsp.lua
+    · fontloader-font-oup.lua
+    · fontloader-font-otl.lua
+    · fontloader-font-oto.lua
+    · fontloader-font-otj.lua
+    · fontloader-font-ota.lua
+    · fontloader-font-ots.lua
+    · fontloader-font-osd.lua
+    · fontloader-font-ocl.lua
+    · fontloader-font-otc.lua
+    · fontloader-font-onr.lua
+    · fontloader-font-one.lua
+    · fontloader-font-afk.lua
+    · fontloader-font-tfm.lua
+    · fontloader-font-lua.lua
+    · fontloader-font-def.lua
+    · fontloader-fonts-ext.lua
+    · fontloader-font-gbn.lua
+
+--info]]-----------------------------------------------------------------------
+
+
+do  --- [luaotfload, fontloader-2017-02-11.lua scope for “data-con” d8982c834ed9acc6193eee23067b9d5d] ---
+
+if not modules then modules={} end modules ['data-con']={
+  version=1.100,
+  comment="companion to luat-lib.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local format,lower,gsub=string.format,string.lower,string.gsub
+local trace_cache=false trackers.register("resolvers.cache",function(v) trace_cache=v end)
+local trace_containers=false trackers.register("resolvers.containers",function(v) trace_containers=v end)
+local trace_storage=false trackers.register("resolvers.storage",function(v) trace_storage=v end)
+containers=containers or {}
+local containers=containers
+containers.usecache=true
+local report_containers=logs.reporter("resolvers","containers")
+local allocated={}
+local mt={
+  __index=function(t,k)
+    if k=="writable" then
+      local writable=caches.getwritablepath(t.category,t.subcategory) or { "." }
+      t.writable=writable
+      return writable
+    elseif k=="readables" then
+      local readables=caches.getreadablepaths(t.category,t.subcategory) or { "." }
+      t.readables=readables
+      return readables
+    end
+  end,
+  __storage__=true
+}
+function containers.define(category,subcategory,version,enabled)
+  if category and subcategory then
+    local c=allocated[category]
+    if not c then
+      c={}
+      allocated[category]=c
+    end
+    local s=c[subcategory]
+    if not s then
+      s={
+        category=category,
+        subcategory=subcategory,
+        storage={},
+        enabled=enabled,
+        version=version or math.pi,
+        trace=false,
+      }
+      setmetatable(s,mt)
+      c[subcategory]=s
+    end
+    return s
+  end
+end
+function containers.is_usable(container,name)
+  return container.enabled and caches and caches.is_writable(container.writable,name)
+end
+function containers.is_valid(container,name)
+  if name and name~="" then
+    local storage=container.storage[name]
+    return storage and storage.cache_version==container.version
+  else
+    return false
+  end
+end
+function containers.read(container,name)
+  local storage=container.storage
+  local stored=storage[name]
+  if not stored and container.enabled and caches and containers.usecache then
+    stored=caches.loaddata(container.readables,name,container.writable)
+    if stored and stored.cache_version==container.version then
+      if trace_cache or trace_containers then
+        report_containers("action %a, category %a, name %a","load",container.subcategory,name)
+      end
+    else
+      stored=nil
+    end
+    storage[name]=stored
+  elseif stored then
+    if trace_cache or trace_containers then
+      report_containers("action %a, category %a, name %a","reuse",container.subcategory,name)
+    end
+  end
+  return stored
+end
+function containers.write(container,name,data)
+  if data then
+    data.cache_version=container.version
+    if container.enabled and caches then
+      local unique,shared=data.unique,data.shared
+      data.unique,data.shared=nil,nil
+      caches.savedata(container.writable,name,data)
+      if trace_cache or trace_containers then
+        report_containers("action %a, category %a, name %a","save",container.subcategory,name)
+      end
+      data.unique,data.shared=unique,shared
+    end
+    if trace_cache or trace_containers then
+      report_containers("action %a, category %a, name %a","store",container.subcategory,name)
+    end
+    container.storage[name]=data
+  end
+  return data
+end
+function containers.content(container,name)
+  return container.storage[name]
+end
+function containers.cleanname(name)
+  return (gsub(lower(name),"[^%w\128-\255]+","-")) 
+end
+
+end --- [luaotfload, fontloader-2017-02-11.lua scope for “data-con”] ---
+
+
+do  --- [luaotfload, fontloader-2017-02-11.lua scope for “basics-nod” 9288471b8395bfb683aba0ff3964d950] ---
+
+if not modules then modules={} end modules ['luatex-fonts-nod']={
+  version=1.001,
+  comment="companion to luatex-fonts.lua",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+if context then
+  texio.write_nl("fatal error: this module is not for context")
+  os.exit()
+end
+if tex.attribute[0]~=0 then
+  texio.write_nl("log","!")
+  texio.write_nl("log","! Attribute 0 is reserved for ConTeXt's font feature management and has to be")
+  texio.write_nl("log","! set to zero. Also, some attributes in the range 1-255 are used for special")
+  texio.write_nl("log","! purposes so setting them at the TeX end might break the font handler.")
+  texio.write_nl("log","!")
+  tex.attribute[0]=0 
+end
+attributes=attributes or {}
+attributes.unsetvalue=-0x7FFFFFFF
+local numbers,last={},127
+attributes.private=attributes.private or function(name)
+  local number=numbers[name]
+  if not number then
+    if last<255 then
+      last=last+1
+    end
+    number=last
+    numbers[name]=number
+  end
+  return number
+end
+nodes={}
+nodes.pool={}
+nodes.handlers={}
+local nodecodes={}
+local glyphcodes=node.subtypes("glyph")
+local disccodes=node.subtypes("disc")
+for k,v in next,node.types() do
+  v=string.gsub(v,"_","")
+  nodecodes[k]=v
+  nodecodes[v]=k
+end
+for i=0,#glyphcodes do
+  glyphcodes[glyphcodes[i]]=i
+end
+for i=0,#disccodes do
+  disccodes[disccodes[i]]=i
+end
+nodes.nodecodes=nodecodes
+nodes.glyphcodes=glyphcodes
+nodes.disccodes=disccodes
+local flush_node=node.flush_node
+local remove_node=node.remove
+local new_node=node.new
+local traverse_id=node.traverse_id
+nodes.handlers.protectglyphs=node.protect_glyphs
+nodes.handlers.unprotectglyphs=node.unprotect_glyphs
+local math_code=nodecodes.math
+local end_of_math=node.end_of_math
+function node.end_of_math(n)
+  if n.id==math_code and n.subtype==1 then
+    return n
+  else
+    return end_of_math(n)
+  end
+end
+function nodes.remove(head,current,free_too)
+  local t=current
+  head,current=remove_node(head,current)
+  if t then
+    if free_too then
+      flush_node(t)
+      t=nil
+    else
+      t.next,t.prev=nil,nil
+    end
+  end
+  return head,current,t
+end
+function nodes.delete(head,current)
+  return nodes.remove(head,current,true)
+end
+function nodes.pool.kern(k)
+  local n=new_node("kern",1)
+  n.kern=k
+  return n
+end
+local getfield=node.getfield
+local setfield=node.setfield
+nodes.getfield=getfield
+nodes.setfield=setfield
+nodes.getattr=getfield
+nodes.setattr=setfield
+nodes.tostring=node.tostring or tostring
+nodes.copy=node.copy
+nodes.copy_node=node.copy
+nodes.copy_list=node.copy_list
+nodes.delete=node.delete
+nodes.dimensions=node.dimensions
+nodes.end_of_math=node.end_of_math
+nodes.flush_list=node.flush_list
+nodes.flush_node=node.flush_node
+nodes.flush=node.flush_node
+nodes.free=node.free
+nodes.insert_after=node.insert_after
+nodes.insert_before=node.insert_before
+nodes.hpack=node.hpack
+nodes.new=node.new
+nodes.tail=node.tail
+nodes.traverse=node.traverse
+nodes.traverse_id=node.traverse_id
+nodes.slide=node.slide
+nodes.vpack=node.vpack
+nodes.first_glyph=node.first_glyph
+nodes.has_glyph=node.has_glyph or node.first_glyph
+nodes.current_attr=node.current_attr
+nodes.has_field=node.has_field
+nodes.last_node=node.last_node
+nodes.usedlist=node.usedlist
+nodes.protrusion_skippable=node.protrusion_skippable
+nodes.write=node.write
+nodes.has_attribute=node.has_attribute
+nodes.set_attribute=node.set_attribute
+nodes.unset_attribute=node.unset_attribute
+nodes.protect_glyphs=node.protect_glyphs
+nodes.unprotect_glyphs=node.unprotect_glyphs
+nodes.mlist_to_hlist=node.mlist_to_hlist
+local direct=node.direct
+local nuts={}
+nodes.nuts=nuts
+local tonode=direct.tonode
+local tonut=direct.todirect
+nodes.tonode=tonode
+nodes.tonut=tonut
+nuts.tonode=tonode
+nuts.tonut=tonut
+local getfield=direct.getfield
+local setfield=direct.setfield
+nuts.getfield=getfield
+nuts.setfield=setfield
+nuts.getnext=direct.getnext
+nuts.setnext=direct.setnext
+nuts.getprev=direct.getprev
+nuts.setprev=direct.setprev
+nuts.getboth=direct.getboth
+nuts.setboth=direct.setboth
+nuts.getid=direct.getid
+nuts.getattr=direct.get_attribute or direct.has_attribute or getfield
+nuts.setattr=setfield
+nuts.getfont=direct.getfont
+nuts.setfont=direct.setfont
+nuts.getsubtype=direct.getsubtype
+nuts.setsubtype=direct.setsubtype or function(n,s) setfield(n,"subtype",s) end
+nuts.getchar=direct.getchar
+nuts.setchar=direct.setchar
+nuts.getdisc=direct.getdisc
+nuts.setdisc=direct.setdisc
+nuts.setlink=direct.setlink
+nuts.getlist=direct.getlist
+nuts.setlist=direct.setlist  or function(n,l) setfield(n,"list",l) end
+nuts.getleader=direct.getleader
+nuts.setleader=direct.setleader or function(n,l) setfield(n,"leader",l) end
+if not direct.is_glyph then
+  local getchar=direct.getchar
+  local getid=direct.getid
+  local getfont=direct.getfont
+  local glyph_code=nodes.nodecodes.glyph
+  function direct.is_glyph(n,f)
+    local id=getid(n)
+    if id==glyph_code then
+      if f and getfont(n)==f then
+        return getchar(n)
+      else
+        return false
+      end
+    else
+      return nil,id
+    end
+  end
+  function direct.is_char(n,f)
+    local id=getid(n)
+    if id==glyph_code then
+      if getsubtype(n)>=256 then
+        return false
+      elseif f and getfont(n)==f then
+        return getchar(n)
+      else
+        return false
+      end
+    else
+      return nil,id
+    end
+  end
+end
+nuts.ischar=direct.is_char
+nuts.is_char=direct.is_char
+nuts.isglyph=direct.is_glyph
+nuts.is_glyph=direct.is_glyph
+nuts.insert_before=direct.insert_before
+nuts.insert_after=direct.insert_after
+nuts.delete=direct.delete
+nuts.copy=direct.copy
+nuts.copy_node=direct.copy
+nuts.copy_list=direct.copy_list
+nuts.tail=direct.tail
+nuts.flush_list=direct.flush_list
+nuts.flush_node=direct.flush_node
+nuts.flush=direct.flush
+nuts.free=direct.free
+nuts.remove=direct.remove
+nuts.is_node=direct.is_node
+nuts.end_of_math=direct.end_of_math
+nuts.traverse=direct.traverse
+nuts.traverse_id=direct.traverse_id
+nuts.traverse_char=direct.traverse_char
+nuts.ligaturing=direct.ligaturing
+nuts.kerning=direct.kerning
+nuts.getprop=nuts.getattr
+nuts.setprop=nuts.setattr
+local new_nut=direct.new
+nuts.new=new_nut
+nuts.pool={}
+function nuts.pool.kern(k)
+  local n=new_nut("kern",1)
+  setfield(n,"kern",k)
+  return n
+end
+local propertydata=direct.get_properties_table()
+nodes.properties={ data=propertydata }
+direct.set_properties_mode(true,true)   
+function direct.set_properties_mode() end 
+nuts.getprop=function(n,k)
+  local p=propertydata[n]
+  if p then
+    return p[k]
+  end
+end
+nuts.setprop=function(n,k,v)
+  if v then
+    local p=propertydata[n]
+    if p then
+      p[k]=v
+    else
+      propertydata[n]={ [k]=v }
+    end
+  end
+end
+nodes.setprop=nodes.setproperty
+nodes.getprop=nodes.getproperty
+
+end --- [luaotfload, fontloader-2017-02-11.lua scope for “basics-nod”] ---
+
+
+do  --- [luaotfload, fontloader-2017-02-11.lua scope for “font-ini” 10cb9a563a98e06ff79c35a8751e13dc] ---
+
+if not modules then modules={} end modules ['font-ini']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local allocate=utilities.storage.allocate
+fonts=fonts or {}
+local fonts=fonts
+fonts.hashes={ identifiers=allocate() }
+fonts.tables=fonts.tables   or {}
+fonts.helpers=fonts.helpers  or {}
+fonts.tracers=fonts.tracers  or {} 
+fonts.specifiers=fonts.specifiers or {} 
+fonts.analyzers={} 
+fonts.readers={}
+fonts.definers={ methods={} }
+fonts.loggers={ register=function() end }
+fontloader.totable=fontloader.to_table 
+
+end --- [luaotfload, fontloader-2017-02-11.lua scope for “font-ini”] ---
+
+
+do  --- [luaotfload, fontloader-2017-02-11.lua scope for “font-con” 7575a7b4e6d04816072945e27d7d0b33] ---
+
+if not modules then modules={} end modules ['font-con']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local next,tostring,rawget=next,tostring,rawget
+local format,match,lower,gsub,find=string.format,string.match,string.lower,string.gsub,string.find
+local sort,insert,concat,sortedkeys,serialize,fastcopy=table.sort,table.insert,table.concat,table.sortedkeys,table.serialize,table.fastcopy
+local derivetable=table.derive
+local ioflush=io.flush
+local trace_defining=false trackers.register("fonts.defining",function(v) trace_defining=v end)
+local trace_scaling=false trackers.register("fonts.scaling",function(v) trace_scaling=v end)
+local report_defining=logs.reporter("fonts","defining")
+local fonts=fonts
+local constructors=fonts.constructors or {}
+fonts.constructors=constructors
+local handlers=fonts.handlers or {} 
+fonts.handlers=handlers
+local allocate=utilities.storage.allocate
+local setmetatableindex=table.setmetatableindex
+constructors.dontembed=allocate()
+constructors.autocleanup=true
+constructors.namemode="fullpath" 
+constructors.version=1.01
+constructors.cache=containers.define("fonts","constructors",constructors.version,false)
+constructors.privateoffset=0xF0000 
+constructors.cacheintex=true
+local designsizes=allocate()
+constructors.designsizes=designsizes
+local loadedfonts=allocate()
+constructors.loadedfonts=loadedfonts
+local factors={
+  pt=65536.0,
+  bp=65781.8,
+}
+function constructors.setfactor(f)
+  constructors.factor=factors[f or 'pt'] or factors.pt
+end
+constructors.setfactor()
+function constructors.scaled(scaledpoints,designsize) 
+  if scaledpoints<0 then
+    local factor=constructors.factor
+    if designsize then
+      if designsize>factor then 
+        return (- scaledpoints/1000)*designsize 
+      else
+        return (- scaledpoints/1000)*designsize*factor
+      end
+    else
+      return (- scaledpoints/1000)*10*factor
+    end
+  else
+    return scaledpoints
+  end
+end
+function constructors.cleanuptable(tfmdata)
+  if constructors.autocleanup and tfmdata.properties.virtualized then
+    for k,v in next,tfmdata.characters do
+      if v.commands then v.commands=nil end
+    end
+  end
+end
+function constructors.calculatescale(tfmdata,scaledpoints)
+  local parameters=tfmdata.parameters
+  if scaledpoints<0 then
+    scaledpoints=(- scaledpoints/1000)*(tfmdata.designsize or parameters.designsize) 
+  end
+  return scaledpoints,scaledpoints/(parameters.units or 1000) 
+end
+local unscaled={
+  ScriptPercentScaleDown=true,
+  ScriptScriptPercentScaleDown=true,
+  RadicalDegreeBottomRaisePercent=true,
+  NoLimitSupFactor=true,
+  NoLimitSubFactor=true,
+}
+function constructors.assignmathparameters(target,original)
+  local mathparameters=original.mathparameters
+  if mathparameters and next(mathparameters) then
+    local targetparameters=target.parameters
+    local targetproperties=target.properties
+    local targetmathparameters={}
+    local factor=targetproperties.math_is_scaled and 1 or targetparameters.factor
+    for name,value in next,mathparameters do
+      if unscaled[name] then
+        targetmathparameters[name]=value
+      else
+        targetmathparameters[name]=value*factor
+      end
+    end
+    if not targetmathparameters.FractionDelimiterSize then
+      targetmathparameters.FractionDelimiterSize=1.01*targetparameters.size
+    end
+    if not mathparameters.FractionDelimiterDisplayStyleSize then
+      targetmathparameters.FractionDelimiterDisplayStyleSize=2.40*targetparameters.size
+    end
+    target.mathparameters=targetmathparameters
+  end
+end
+function constructors.beforecopyingcharacters(target,original)
+end
+function constructors.aftercopyingcharacters(target,original)
+end
+constructors.sharefonts=false
+constructors.nofsharedfonts=0
+local sharednames={}
+function constructors.trytosharefont(target,tfmdata)
+  if constructors.sharefonts then 
+    local characters=target.characters
+    local n=1
+    local t={ target.psname }
+    local u=sortedkeys(characters)
+    for i=1,#u do
+      local k=u[i]
+      n=n+1;t[n]=k
+      n=n+1;t[n]=characters[k].index or k
+    end
+    local h=md5.HEX(concat(t," "))
+    local s=sharednames[h]
+    if s then
+      if trace_defining then
+        report_defining("font %a uses backend resources of font %a",target.fullname,s)
+      end
+      target.fullname=s
+      constructors.nofsharedfonts=constructors.nofsharedfonts+1
+      target.properties.sharedwith=s
+    else
+      sharednames[h]=target.fullname
+    end
+  end
+end
+function constructors.enhanceparameters(parameters)
+  local xheight=parameters.x_height
+  local quad=parameters.quad
+  local space=parameters.space
+  local stretch=parameters.space_stretch
+  local shrink=parameters.space_shrink
+  local extra=parameters.extra_space
+  local slant=parameters.slant
+  parameters.xheight=xheight
+  parameters.spacestretch=stretch
+  parameters.spaceshrink=shrink
+  parameters.extraspace=extra
+  parameters.em=quad
+  parameters.ex=xheight
+  parameters.slantperpoint=slant
+  parameters.spacing={
+    width=space,
+    stretch=stretch,
+    shrink=shrink,
+    extra=extra,
+  }
+end
+local function mathkerns(v,vdelta)
+  local k={}
+  for i=1,#v do
+    local entry=v[i]
+    local height=entry.height
+    local kern=entry.kern
+    k[i]={
+      height=height and vdelta*height or 0,
+      kern=kern  and vdelta*kern  or 0,
+    }
+  end
+  return k
+end
+local psfake=0
+local function fixedpsname(psname,fallback)
+  local usedname=psname
+  if psname and psname~="" then
+    if find(psname," ") then
+      usedname=gsub(psname,"[%s]+","-")
+    else
+    end
+  elseif not fallback or fallback=="" then
+    psfake=psfake+1
+    psname="fakename-"..psfake
+  else
+    psname=fallback
+    usedname=gsub(psname,"[^a-zA-Z0-9]+","-")
+  end
+  return usedname,psname~=usedname
+end
+function constructors.scale(tfmdata,specification)
+  local target={}
+  if tonumber(specification) then
+    specification={ size=specification }
+  end
+  target.specification=specification
+  local scaledpoints=specification.size
+  local relativeid=specification.relativeid
+  local properties=tfmdata.properties   or {}
+  local goodies=tfmdata.goodies    or {}
+  local resources=tfmdata.resources   or {}
+  local descriptions=tfmdata.descriptions  or {} 
+  local characters=tfmdata.characters   or {} 
+  local changed=tfmdata.changed    or {} 
+  local shared=tfmdata.shared     or {}
+  local parameters=tfmdata.parameters   or {}
+  local mathparameters=tfmdata.mathparameters or {}
+  local targetcharacters={}
+  local targetdescriptions=derivetable(descriptions)
+  local targetparameters=derivetable(parameters)
+  local targetproperties=derivetable(properties)
+  local targetgoodies=goodies            
+  target.characters=targetcharacters
+  target.descriptions=targetdescriptions
+  target.parameters=targetparameters
+  target.properties=targetproperties
+  target.goodies=targetgoodies
+  target.shared=shared
+  target.resources=resources
+  target.unscaled=tfmdata
+  local mathsize=tonumber(specification.mathsize) or 0
+  local textsize=tonumber(specification.textsize) or scaledpoints
+  local forcedsize=tonumber(parameters.mathsize  ) or 0
+  local extrafactor=tonumber(specification.factor ) or 1
+  if (mathsize==2 or forcedsize==2) and parameters.scriptpercentage then
+    scaledpoints=parameters.scriptpercentage*textsize/100
+  elseif (mathsize==3 or forcedsize==3) and parameters.scriptscriptpercentage then
+    scaledpoints=parameters.scriptscriptpercentage*textsize/100
+  elseif forcedsize>1000 then 
+    scaledpoints=forcedsize
+  end
+  targetparameters.mathsize=mathsize  
+  targetparameters.textsize=textsize  
+  targetparameters.forcedsize=forcedsize 
+  targetparameters.extrafactor=extrafactor
+  local tounicode=fonts.mappings.tounicode
+  local defaultwidth=resources.defaultwidth or 0
+  local defaultheight=resources.defaultheight or 0
+  local defaultdepth=resources.defaultdepth or 0
+  local units=parameters.units or 1000
+  if target.fonts then
+    target.fonts=fastcopy(target.fonts) 
+  end
+  targetproperties.language=properties.language or "dflt" 
+  targetproperties.script=properties.script  or "dflt" 
+  targetproperties.mode=properties.mode   or "base"
+  local askedscaledpoints=scaledpoints
+  local scaledpoints,delta=constructors.calculatescale(tfmdata,scaledpoints,nil,specification)
+  local hdelta=delta
+  local vdelta=delta
+  target.designsize=parameters.designsize 
+  target.units=units
+  target.units_per_em=units
+  local direction=properties.direction or tfmdata.direction or 0 
+  target.direction=direction
+  properties.direction=direction
+  target.size=scaledpoints
+  target.encodingbytes=properties.encodingbytes or 1
+  target.embedding=properties.embedding or "subset"
+  target.tounicode=1
+  target.cidinfo=properties.cidinfo
+  target.format=properties.format
+  target.cache=constructors.cacheintex and "yes" or "renew"
+  local fontname=properties.fontname or tfmdata.fontname
+  local fullname=properties.fullname or tfmdata.fullname
+  local filename=properties.filename or tfmdata.filename
+  local psname=properties.psname  or tfmdata.psname
+  local name=properties.name   or tfmdata.name
+  local psname,psfixed=fixedpsname(psname,fontname or fullname or file.nameonly(filename))
+  target.fontname=fontname
+  target.fullname=fullname
+  target.filename=filename
+  target.psname=psname
+  target.name=name
+  properties.fontname=fontname
+  properties.fullname=fullname
+  properties.filename=filename
+  properties.psname=psname
+  properties.name=name
+  local expansion=parameters.expansion
+  if expansion then
+    target.stretch=expansion.stretch
+    target.shrink=expansion.shrink
+    target.step=expansion.step
+    target.auto_expand=expansion.auto
+  end
+  local protrusion=parameters.protrusion
+  if protrusion then
+    target.auto_protrude=protrusion.auto
+  end
+  local extendfactor=parameters.extendfactor or 0
+  if extendfactor~=0 and extendfactor~=1 then
+    hdelta=hdelta*extendfactor
+    target.extend=extendfactor*1000 
+  else
+    target.extend=1000 
+  end
+  local slantfactor=parameters.slantfactor or 0
+  if slantfactor~=0 then
+    target.slant=slantfactor*1000
+  else
+    target.slant=0
+  end
+  targetparameters.factor=delta
+  targetparameters.hfactor=hdelta
+  targetparameters.vfactor=vdelta
+  targetparameters.size=scaledpoints
+  targetparameters.units=units
+  targetparameters.scaledpoints=askedscaledpoints
+  local isvirtual=properties.virtualized or tfmdata.type=="virtual"
+  local hasquality=target.auto_expand or target.auto_protrude
+  local hasitalics=properties.hasitalics
+  local autoitalicamount=properties.autoitalicamount
+  local stackmath=not properties.nostackmath
+  local nonames=properties.noglyphnames
+  local haskerns=properties.haskerns   or properties.mode=="base" 
+  local hasligatures=properties.hasligatures or properties.mode=="base" 
+  local realdimensions=properties.realdimensions
+  local writingmode=properties.writingmode or "horizontal"
+  local identity=properties.identity or "horizontal"
+  if changed and not next(changed) then
+    changed=false
+  end
+  target.type=isvirtual and "virtual" or "real"
+  target.writingmode=writingmode=="vertical" and "vertical" or "horizontal"
+  target.identity=identity=="vertical" and "vertical" or "horizontal"
+  target.postprocessors=tfmdata.postprocessors
+  local targetslant=(parameters.slant     or parameters[1] or 0)*factors.pt 
+  local targetspace=(parameters.space     or parameters[2] or 0)*hdelta
+  local targetspace_stretch=(parameters.space_stretch or parameters[3] or 0)*hdelta
+  local targetspace_shrink=(parameters.space_shrink or parameters[4] or 0)*hdelta
+  local targetx_height=(parameters.x_height   or parameters[5] or 0)*vdelta
+  local targetquad=(parameters.quad     or parameters[6] or 0)*hdelta
+  local targetextra_space=(parameters.extra_space  or parameters[7] or 0)*hdelta
+  targetparameters.slant=targetslant 
+  targetparameters.space=targetspace
+  targetparameters.space_stretch=targetspace_stretch
+  targetparameters.space_shrink=targetspace_shrink
+  targetparameters.x_height=targetx_height
+  targetparameters.quad=targetquad
+  targetparameters.extra_space=targetextra_space
+  local ascender=parameters.ascender
+  if ascender then
+    targetparameters.ascender=delta*ascender
+  end
+  local descender=parameters.descender
+  if descender then
+    targetparameters.descender=delta*descender
+  end
+  constructors.enhanceparameters(targetparameters)
+  local protrusionfactor=(targetquad~=0 and 1000/targetquad) or 0
+  local scaledwidth=defaultwidth*hdelta
+  local scaledheight=defaultheight*vdelta
+  local scaleddepth=defaultdepth*vdelta
+  local hasmath=(properties.hasmath or next(mathparameters)) and true
+  if hasmath then
+    constructors.assignmathparameters(target,tfmdata) 
+    properties.hasmath=true
+    target.nomath=false
+    target.MathConstants=target.mathparameters
+  else
+    properties.hasmath=false
+    target.nomath=true
+    target.mathparameters=nil 
+  end
+  if hasmath then
+    local mathitalics=properties.mathitalics
+    if mathitalics==false then
+      if trace_defining then
+        report_defining("%s italics %s for font %a, fullname %a, filename %a","math",hasitalics and "ignored" or "disabled",name,fullname,filename)
+      end
+      hasitalics=false
+      autoitalicamount=false
+    end
+  else
+    local textitalics=properties.textitalics
+    if textitalics==false then
+      if trace_defining then
+        report_defining("%s italics %s for font %a, fullname %a, filename %a","text",hasitalics and "ignored" or "disabled",name,fullname,filename)
+      end
+      hasitalics=false
+      autoitalicamount=false
+    end
+  end
+  if trace_defining then
+    report_defining("defining tfm, name %a, fullname %a, filename %a, %spsname %a, hscale %a, vscale %a, math %a, italics %a",
+      name,fullname,filename,psfixed and "(fixed) " or "",psname,hdelta,vdelta,
+      hasmath and "enabled" or "disabled",hasitalics and "enabled" or "disabled")
+  end
+  constructors.beforecopyingcharacters(target,tfmdata)
+  local sharedkerns={}
+  for unicode,character in next,characters do
+    local chr,description,index
+    if changed then
+      local c=changed[unicode]
+      if c then
+        description=descriptions[c] or descriptions[unicode] or character
+        character=characters[c] or character
+        index=description.index or c
+      else
+        description=descriptions[unicode] or character
+        index=description.index or unicode
+      end
+    else
+      description=descriptions[unicode] or character
+      index=description.index or unicode
+    end
+    local width=description.width
+    local height=description.height
+    local depth=description.depth
+    if realdimensions then
+      if not height or height==0 then
+        local bb=description.boundingbox
+        local ht=bb[4]
+        if ht~=0 then
+          height=ht
+        end
+        if not depth or depth==0 then
+          local dp=-bb[2]
+          if dp~=0 then
+            depth=dp
+          end
+        end
+      elseif not depth or depth==0 then
+        local dp=-description.boundingbox[2]
+        if dp~=0 then
+          depth=dp
+        end
+      end
+    end
+    if width then width=hdelta*width else width=scaledwidth end
+    if height then height=vdelta*height else height=scaledheight end
+    if depth and depth~=0 then
+      depth=delta*depth
+      if nonames then
+        chr={
+          index=index,
+          height=height,
+          depth=depth,
+          width=width,
+        }
+      else
+        chr={
+          name=description.name,
+          index=index,
+          height=height,
+          depth=depth,
+          width=width,
+        }
+      end
+    else
+      if nonames then
+        chr={
+          index=index,
+          height=height,
+          width=width,
+        }
+      else
+        chr={
+          name=description.name,
+          index=index,
+          height=height,
+          width=width,
+        }
+      end
+    end
+    local isunicode=description.unicode
+    if isunicode then
+      chr.unicode=isunicode
+      chr.tounicode=tounicode(isunicode)
+    end
+    if hasquality then
+      local ve=character.expansion_factor
+      if ve then
+        chr.expansion_factor=ve*1000 
+      end
+      local vl=character.left_protruding
+      if vl then
+        chr.left_protruding=protrusionfactor*width*vl
+      end
+      local vr=character.right_protruding
+      if vr then
+        chr.right_protruding=protrusionfactor*width*vr
+      end
+    end
+    if hasmath then
+      local vn=character.next
+      if vn then
+        chr.next=vn
+      else
+        local vv=character.vert_variants
+        if vv then
+          local t={}
+          for i=1,#vv do
+            local vvi=vv[i]
+            t[i]={
+              ["start"]=(vvi["start"]  or 0)*vdelta,
+              ["end"]=(vvi["end"]   or 0)*vdelta,
+              ["advance"]=(vvi["advance"] or 0)*vdelta,
+              ["extender"]=vvi["extender"],
+              ["glyph"]=vvi["glyph"],
+            }
+          end
+          chr.vert_variants=t
+        else
+          local hv=character.horiz_variants
+          if hv then
+            local t={}
+            for i=1,#hv do
+              local hvi=hv[i]
+              t[i]={
+                ["start"]=(hvi["start"]  or 0)*hdelta,
+                ["end"]=(hvi["end"]   or 0)*hdelta,
+                ["advance"]=(hvi["advance"] or 0)*hdelta,
+                ["extender"]=hvi["extender"],
+                ["glyph"]=hvi["glyph"],
+              }
+            end
+            chr.horiz_variants=t
+          end
+        end
+      end
+      local vi=character.vert_italic
+      if vi and vi~=0 then
+        chr.vert_italic=vi*hdelta
+      end
+      local va=character.accent
+      if va then
+        chr.top_accent=vdelta*va
+      end
+      if stackmath then
+        local mk=character.mathkerns
+        if mk then
+          local tr,tl,br,bl=mk.topright,mk.topleft,mk.bottomright,mk.bottomleft
+          chr.mathkern={ 
+            top_right=tr and mathkerns(tr,vdelta) or nil,
+            top_left=tl and mathkerns(tl,vdelta) or nil,
+            bottom_right=br and mathkerns(br,vdelta) or nil,
+            bottom_left=bl and mathkerns(bl,vdelta) or nil,
+          }
+        end
+      end
+      if hasitalics then
+        local vi=character.italic
+        if vi and vi~=0 then
+          chr.italic=vi*hdelta
+        end
+      end
+    elseif autoitalicamount then 
+      local vi=description.italic
+      if not vi then
+        local bb=description.boundingbox
+        if bb then
+          local vi=bb[3]-description.width+autoitalicamount
+          if vi>0 then 
+            chr.italic=vi*hdelta
+          end
+        else
+        end
+      elseif vi~=0 then
+        chr.italic=vi*hdelta
+      end
+    elseif hasitalics then 
+      local vi=character.italic
+      if vi and vi~=0 then
+        chr.italic=vi*hdelta
+      end
+    end
+    if haskerns then
+      local vk=character.kerns
+      if vk then
+        local s=sharedkerns[vk]
+        if not s then
+          s={}
+          for k,v in next,vk do s[k]=v*hdelta end
+          sharedkerns[vk]=s
+        end
+        chr.kerns=s
+      end
+    end
+    if hasligatures then
+      local vl=character.ligatures
+      if vl then
+        if true then
+          chr.ligatures=vl 
+        else
+          local tt={}
+          for i,l in next,vl do
+            tt[i]=l
+          end
+          chr.ligatures=tt
+        end
+      end
+    end
+    if isvirtual then
+      local vc=character.commands
+      if vc then
+        local ok=false
+        for i=1,#vc do
+          local key=vc[i][1]
+          if key=="right" or key=="down" then
+            ok=true
+            break
+          end
+        end
+        if ok then
+          local tt={}
+          for i=1,#vc do
+            local ivc=vc[i]
+            local key=ivc[1]
+            if key=="right" then
+              tt[i]={ key,ivc[2]*hdelta }
+            elseif key=="down" then
+              tt[i]={ key,ivc[2]*vdelta }
+            elseif key=="rule" then
+              tt[i]={ key,ivc[2]*vdelta,ivc[3]*hdelta }
+            else 
+              tt[i]=ivc 
+            end
+          end
+          chr.commands=tt
+        else
+          chr.commands=vc
+        end
+        chr.index=nil
+      end
+    end
+    targetcharacters[unicode]=chr
+  end
+  properties.setitalics=hasitalics
+  constructors.aftercopyingcharacters(target,tfmdata)
+  constructors.trytosharefont(target,tfmdata)
+  return target
+end
+function constructors.finalize(tfmdata)
+  if tfmdata.properties and tfmdata.properties.finalized then
+    return
+  end
+  if not tfmdata.characters then
+    return nil
+  end
+  if not tfmdata.goodies then
+    tfmdata.goodies={} 
+  end
+  local parameters=tfmdata.parameters
+  if not parameters then
+    return nil
+  end
+  if not parameters.expansion then
+    parameters.expansion={
+      stretch=tfmdata.stretch   or 0,
+      shrink=tfmdata.shrink   or 0,
+      step=tfmdata.step    or 0,
+      auto=tfmdata.auto_expand or false,
+    }
+  end
+  if not parameters.protrusion then
+    parameters.protrusion={
+      auto=auto_protrude
+    }
+  end
+  if not parameters.size then
+    parameters.size=tfmdata.size
+  end
+  if not parameters.extendfactor then
+    parameters.extendfactor=tfmdata.extend or 0
+  end
+  if not parameters.slantfactor then
+    parameters.slantfactor=tfmdata.slant or 0
+  end
+  local designsize=parameters.designsize
+  if designsize then
+    parameters.minsize=tfmdata.minsize or designsize
+    parameters.maxsize=tfmdata.maxsize or designsize
+  else
+    designsize=factors.pt*10
+    parameters.designsize=designsize
+    parameters.minsize=designsize
+    parameters.maxsize=designsize
+  end
+  parameters.minsize=tfmdata.minsize or parameters.designsize
+  parameters.maxsize=tfmdata.maxsize or parameters.designsize
+  if not parameters.units then
+    parameters.units=tfmdata.units or tfmdata.units_per_em or 1000
+  end
+  if not tfmdata.descriptions then
+    local descriptions={} 
+    setmetatableindex(descriptions,function(t,k) local v={} t[k]=v return v end)
+    tfmdata.descriptions=descriptions
+  end
+  local properties=tfmdata.properties
+  if not properties then
+    properties={}
+    tfmdata.properties=properties
+  end
+  if not properties.virtualized then
+    properties.virtualized=tfmdata.type=="virtual"
+  end
+  if not tfmdata.properties then
+    tfmdata.properties={
+      fontname=tfmdata.fontname,
+      filename=tfmdata.filename,
+      fullname=tfmdata.fullname,
+      name=tfmdata.name,
+      psname=tfmdata.psname,
+      encodingbytes=tfmdata.encodingbytes or 1,
+      embedding=tfmdata.embedding   or "subset",
+      tounicode=tfmdata.tounicode   or 1,
+      cidinfo=tfmdata.cidinfo    or nil,
+      format=tfmdata.format    or "type1",
+      direction=tfmdata.direction   or 0,
+      writingmode=tfmdata.writingmode  or "horizontal",
+      identity=tfmdata.identity   or "horizontal",
+    }
+  end
+  if not tfmdata.resources then
+    tfmdata.resources={}
+  end
+  if not tfmdata.shared then
+    tfmdata.shared={}
+  end
+  if not properties.hasmath then
+    properties.hasmath=not tfmdata.nomath
+  end
+  tfmdata.MathConstants=nil
+  tfmdata.postprocessors=nil
+  tfmdata.fontname=nil
+  tfmdata.filename=nil
+  tfmdata.fullname=nil
+  tfmdata.name=nil 
+  tfmdata.psname=nil
+  tfmdata.encodingbytes=nil
+  tfmdata.embedding=nil
+  tfmdata.tounicode=nil
+  tfmdata.cidinfo=nil
+  tfmdata.format=nil
+  tfmdata.direction=nil
+  tfmdata.type=nil
+  tfmdata.nomath=nil
+  tfmdata.designsize=nil
+  tfmdata.size=nil
+  tfmdata.stretch=nil
+  tfmdata.shrink=nil
+  tfmdata.step=nil
+  tfmdata.auto_expand=nil
+  tfmdata.auto_protrude=nil
+  tfmdata.extend=nil
+  tfmdata.slant=nil
+  tfmdata.units=nil
+  tfmdata.units_per_em=nil
+  tfmdata.cache=nil
+  properties.finalized=true
+  return tfmdata
+end
+local hashmethods={}
+constructors.hashmethods=hashmethods
+function constructors.hashfeatures(specification) 
+  local features=specification.features
+  if features then
+    local t,tn={},0
+    for category,list in next,features do
+      if next(list) then
+        local hasher=hashmethods[category]
+        if hasher then
+          local hash=hasher(list)
+          if hash then
+            tn=tn+1
+            t[tn]=category..":"..hash
+          end
+        end
+      end
+    end
+    if tn>0 then
+      return concat(t," & ")
+    end
+  end
+  return "unknown"
+end
+hashmethods.normal=function(list)
+  local s={}
+  local n=0
+  for k,v in next,list do
+    if not k then
+    elseif k=="number" or k=="features" then
+    else
+      n=n+1
+      s[n]=k..'='..tostring(v)
+    end
+  end
+  if n>0 then
+    sort(s)
+    return concat(s,"+")
+  end
+end
+function constructors.hashinstance(specification,force)
+  local hash,size,fallbacks=specification.hash,specification.size,specification.fallbacks
+  if force or not hash then
+    hash=constructors.hashfeatures(specification)
+    specification.hash=hash
+  end
+  if size<1000 and designsizes[hash] then
+    size=math.round(constructors.scaled(size,designsizes[hash]))
+    specification.size=size
+  end
+  if fallbacks then
+    return hash..' @ '..tostring(size)..' @ '..fallbacks
+  else
+    return hash..' @ '..tostring(size)
+  end
+end
+function constructors.setname(tfmdata,specification) 
+  if constructors.namemode=="specification" then
+    local specname=specification.specification
+    if specname then
+      tfmdata.properties.name=specname
+      if trace_defining then
+        report_otf("overloaded fontname %a",specname)
+      end
+    end
+  end
+end
+function constructors.checkedfilename(data)
+  local foundfilename=data.foundfilename
+  if not foundfilename then
+    local askedfilename=data.filename or ""
+    if askedfilename~="" then
+      askedfilename=resolvers.resolve(askedfilename) 
+      foundfilename=resolvers.findbinfile(askedfilename,"") or ""
+      if foundfilename=="" then
+        report_defining("source file %a is not found",askedfilename)
+        foundfilename=resolvers.findbinfile(file.basename(askedfilename),"") or ""
+        if foundfilename~="" then
+          report_defining("using source file %a due to cache mismatch",foundfilename)
+        end
+      end
+    end
+    data.foundfilename=foundfilename
+  end
+  return foundfilename
+end
+local formats=allocate()
+fonts.formats=formats
+setmetatableindex(formats,function(t,k)
+  local l=lower(k)
+  if rawget(t,k) then
+    t[k]=l
+    return l
+  end
+  return rawget(t,file.suffix(l))
+end)
+do
+  local function setindeed(mode,source,target,group,name,position)
+    local action=source[mode]
+    if not action then
+      return
+    end
+    local t=target[mode]
+    if not t then
+      report_defining("fatal error in setting feature %a, group %a, mode %a",name,group,mode)
+      os.exit()
+    elseif position then
+      insert(t,position,{ name=name,action=action })
+    else
+      for i=1,#t do
+        local ti=t[i]
+        if ti.name==name then
+          ti.action=action
+          return
+        end
+      end
+      insert(t,{ name=name,action=action })
+    end
+  end
+  local function set(group,name,target,source)
+    target=target[group]
+    if not target then
+      report_defining("fatal target error in setting feature %a, group %a",name,group)
+      os.exit()
+    end
+    local source=source[group]
+    if not source then
+      report_defining("fatal source error in setting feature %a, group %a",name,group)
+      os.exit()
+    end
+    local position=source.position
+    setindeed("node",source,target,group,name,position)
+    setindeed("base",source,target,group,name,position)
+    setindeed("plug",source,target,group,name,position)
+  end
+  local function register(where,specification)
+    local name=specification.name
+    if name and name~="" then
+      local default=specification.default
+      local description=specification.description
+      local initializers=specification.initializers
+      local processors=specification.processors
+      local manipulators=specification.manipulators
+      local modechecker=specification.modechecker
+      if default then
+        where.defaults[name]=default
+      end
+      if description and description~="" then
+        where.descriptions[name]=description
+      end
+      if initializers then
+        set('initializers',name,where,specification)
+      end
+      if processors then
+        set('processors',name,where,specification)
+      end
+      if manipulators then
+        set('manipulators',name,where,specification)
+      end
+      if modechecker then
+        where.modechecker=modechecker
+      end
+    end
+  end
+  constructors.registerfeature=register
+  function constructors.getfeatureaction(what,where,mode,name)
+    what=handlers[what].features
+    if what then
+      where=what[where]
+      if where then
+        mode=where[mode]
+        if mode then
+          for i=1,#mode do
+            local m=mode[i]
+            if m.name==name then
+              return m.action
+            end
+          end
+        end
+      end
+    end
+  end
+  local newfeatures={}
+  constructors.newfeatures=newfeatures 
+  constructors.features=newfeatures
+  local function setnewfeatures(what)
+    local handler=handlers[what]
+    local features=handler.features
+    if not features then
+      local tables=handler.tables   
+      local statistics=handler.statistics 
+      features=allocate {
+        defaults={},
+        descriptions=tables and tables.features or {},
+        used=statistics and statistics.usedfeatures or {},
+        initializers={ base={},node={},plug={} },
+        processors={ base={},node={},plug={} },
+        manipulators={ base={},node={},plug={} },
+      }
+      features.register=function(specification) return register(features,specification) end
+      handler.features=features 
+    end
+    return features
+  end
+  setmetatable(newfeatures,{
+    __call=function(t,k) local v=t[k] return v end,
+    __index=function(t,k) local v=setnewfeatures(k) t[k]=v return v end,
+  })
+end
+do
+  local newhandler={}
+  constructors.handlers=newhandler 
+  constructors.newhandler=newhandler
+  local function setnewhandler(what) 
+    local handler=handlers[what]
+    if not handler then
+      handler={}
+      handlers[what]=handler
+    end
+    return handler
+  end
+  setmetatable(newhandler,{
+    __call=function(t,k) local v=t[k] return v end,
+    __index=function(t,k) local v=setnewhandler(k) t[k]=v return v end,
+  })
+end
+do
+  local newenhancer={}
+  constructors.enhancers=newenhancer
+  constructors.newenhancer=newenhancer
+  local function setnewenhancer(format)
+    local handler=handlers[format]
+    local enhancers=handler.enhancers
+    if not enhancers then
+      local actions=allocate()
+      local before=allocate()
+      local after=allocate()
+      local order=allocate()
+      local patches={ before=before,after=after }
+      local trace=false
+      local report=logs.reporter("fonts",format.." enhancing")
+      trackers.register(format..".loading",function(v) trace=v end)
+      local function enhance(name,data,filename,raw)
+        local enhancer=actions[name]
+        if enhancer then
+          if trace then
+            report("apply enhancement %a to file %a",name,filename)
+            ioflush()
+          end
+          enhancer(data,filename,raw)
+        else
+        end
+      end
+      local function apply(data,filename,raw)
+        local basename=file.basename(lower(filename))
+        if trace then
+          report("%s enhancing file %a","start",filename)
+        end
+        ioflush() 
+        for e=1,#order do
+          local enhancer=order[e]
+          local b=before[enhancer]
+          if b then
+            for pattern,action in next,b do
+              if find(basename,pattern) then
+                action(data,filename,raw)
+              end
+            end
+          end
+          enhance(enhancer,data,filename,raw)
+          local a=after[enhancer]
+          if a then
+            for pattern,action in next,a do
+              if find(basename,pattern) then
+                action(data,filename,raw)
+              end
+            end
+          end
+          ioflush() 
+        end
+        if trace then
+          report("%s enhancing file %a","stop",filename)
+        end
+        ioflush() 
+      end
+      local function register(what,action)
+        if action then
+          if actions[what] then
+          else
+            order[#order+1]=what
+          end
+          actions[what]=action
+        else
+          report("bad enhancer %a",what)
+        end
+      end
+      local function patch(what,where,pattern,action)
+        local pw=patches[what]
+        if pw then
+          local ww=pw[where]
+          if ww then
+            ww[pattern]=action
+          else
+            pw[where]={ [pattern]=action}
+          end
+        end
+      end
+      enhancers={
+        register=register,
+        apply=apply,
+        patch=patch,
+        patches={ register=patch },
+      }
+      handler.enhancers=enhancers
+    end
+    return enhancers
+  end
+  setmetatable(newenhancer,{
+    __call=function(t,k) local v=t[k] return v end,
+    __index=function(t,k) local v=setnewenhancer(k) t[k]=v return v end,
+  })
+end
+function constructors.checkedfeatures(what,features)
+  local defaults=handlers[what].features.defaults
+  if features and next(features) then
+    features=fastcopy(features) 
+    for key,value in next,defaults do
+      if features[key]==nil then
+        features[key]=value
+      end
+    end
+    return features
+  else
+    return fastcopy(defaults) 
+  end
+end
+function constructors.initializefeatures(what,tfmdata,features,trace,report)
+  if features and next(features) then
+    local properties=tfmdata.properties or {} 
+    local whathandler=handlers[what]
+    local whatfeatures=whathandler.features
+    local whatmodechecker=whatfeatures.modechecker
+    local mode=properties.mode or (whatmodechecker and whatmodechecker(tfmdata,features,features.mode)) or features.mode or "base"
+    properties.mode=mode 
+    features.mode=mode
+    local done={}
+    while true do
+      local redo=false
+      local initializers=whatfeatures.initializers[mode]
+      if initializers then
+        for i=1,#initializers do
+          local step=initializers[i]
+          local feature=step.name
+          local value=features[feature]
+          if not value then
+          elseif done[feature] then
+          else
+            local action=step.action
+            if trace then
+              report("initializing feature %a to %a for mode %a for font %a",feature,
+                value,mode,tfmdata.properties.fullname)
+            end
+            action(tfmdata,value,features) 
+            if mode~=properties.mode or mode~=features.mode then
+              if whatmodechecker then
+                properties.mode=whatmodechecker(tfmdata,features,properties.mode) 
+                features.mode=properties.mode
+              end
+              if mode~=properties.mode then
+                mode=properties.mode
+                redo=true
+              end
+            end
+            done[feature]=true
+          end
+          if redo then
+            break
+          end
+        end
+        if not redo then
+          break
+        end
+      else
+        break
+      end
+    end
+    properties.mode=mode 
+    return true
+  else
+    return false
+  end
+end
+function constructors.collectprocessors(what,tfmdata,features,trace,report)
+  local processes,nofprocesses={},0
+  if features and next(features) then
+    local properties=tfmdata.properties
+    local whathandler=handlers[what]
+    local whatfeatures=whathandler.features
+    local whatprocessors=whatfeatures.processors
+    local mode=properties.mode
+    local processors=whatprocessors[mode]
+    if processors then
+      for i=1,#processors do
+        local step=processors[i]
+        local feature=step.name
+        if features[feature] then
+          local action=step.action
+          if trace then
+            report("installing feature processor %a for mode %a for font %a",feature,mode,tfmdata.properties.fullname)
+          end
+          if action then
+            nofprocesses=nofprocesses+1
+            processes[nofprocesses]=action
+          end
+        end
+      end
+    elseif trace then
+      report("no feature processors for mode %a for font %a",mode,properties.fullname)
+    end
+  end
+  return processes
+end
+function constructors.applymanipulators(what,tfmdata,features,trace,report)
+  if features and next(features) then
+    local properties=tfmdata.properties
+    local whathandler=handlers[what]
+    local whatfeatures=whathandler.features
+    local whatmanipulators=whatfeatures.manipulators
+    local mode=properties.mode
+    local manipulators=whatmanipulators[mode]
+    if manipulators then
+      for i=1,#manipulators do
+        local step=manipulators[i]
+        local feature=step.name
+        local value=features[feature]
+        if value then
+          local action=step.action
+          if trace then
+            report("applying feature manipulator %a for mode %a for font %a",feature,mode,properties.fullname)
+          end
+          if action then
+            action(tfmdata,feature,value)
+          end
+        end
+      end
+    end
+  end
+end
+function constructors.addcoreunicodes(unicodes) 
+  if not unicodes then
+    unicodes={}
+  end
+  unicodes.space=0x0020
+  unicodes.hyphen=0x002D
+  unicodes.zwj=0x200D
+  unicodes.zwnj=0x200C
+  return unicodes
+end
+
+end --- [luaotfload, fontloader-2017-02-11.lua scope for “font-con”] ---
+
+
+do  --- [luaotfload, fontloader-2017-02-11.lua scope for “fonts-enc” a7ace7c1969cd64a5ca9888838f3edb6] ---
+
+if not modules then modules={} end modules ['luatex-font-enc']={
+  version=1.001,
+  comment="companion to luatex-*.tex",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+if context then
+  texio.write_nl("fatal error: this module is not for context")
+  os.exit()
+end
+local fonts=fonts
+local encodings={}
+fonts.encodings=encodings
+encodings.agl={}
+encodings.known={}
+setmetatable(encodings.agl,{ __index=function(t,k)
+  if k=="unicodes" then
+    texio.write(" <loading (extended) adobe glyph list>")
+    local unicodes=dofile(resolvers.findfile("font-age.lua"))
+    encodings.agl={ unicodes=unicodes }
+    return unicodes
+  else
+    return nil
+  end
+end })
+encodings.cache=containers.define("fonts","enc",encodings.version,true)
+function encodings.load(filename)
+  local name=file.removesuffix(filename)
+  local data=containers.read(encodings.cache,name)
+  if data then
+    return data
+  end
+  local vector,tag,hash,unicodes={},"",{},{}
+  local foundname=resolvers.findfile(filename,'enc')
+  if foundname and foundname~="" then
+    local ok,encoding,size=resolvers.loadbinfile(foundname)
+    if ok and encoding then
+      encoding=string.gsub(encoding,"%%(.-)\n","")
+      local unicoding=encodings.agl.unicodes
+      local tag,vec=string.match(encoding,"/(%w+)%s*%[(.*)%]%s*def")
+      local i=0
+      for ch in string.gmatch(vec,"/([%a%d%.]+)") do
+        if ch~=".notdef" then
+          vector[i]=ch
+          if not hash[ch] then
+            hash[ch]=i
+          else
+          end
+          local u=unicoding[ch]
+          if u then
+            unicodes[u]=i
+          end
+        end
+        i=i+1
+      end
+    end
+  end
+  local data={
+    name=name,
+    tag=tag,
+    vector=vector,
+    hash=hash,
+    unicodes=unicodes
+  }
+  return containers.write(encodings.cache,name,data)
+end
+
+end --- [luaotfload, fontloader-2017-02-11.lua scope for “fonts-enc”] ---
+
+
+do  --- [luaotfload, fontloader-2017-02-11.lua scope for “font-cid” 52421d1fdaa07ec4b1d936c6ff5079be] ---
+
+if not modules then modules={} end modules ['font-cid']={
+  version=1.001,
+  comment="companion to font-otf.lua (cidmaps)",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local format,match,lower=string.format,string.match,string.lower
+local tonumber=tonumber
+local P,S,R,C,V,lpegmatch=lpeg.P,lpeg.S,lpeg.R,lpeg.C,lpeg.V,lpeg.match
+local fonts,logs,trackers=fonts,logs,trackers
+local trace_loading=false trackers.register("otf.loading",function(v) trace_loading=v end)
+local report_otf=logs.reporter("fonts","otf loading")
+local cid={}
+fonts.cid=cid
+local cidmap={}
+local cidmax=10
+local number=C(R("09","af","AF")^1)
+local space=S(" \n\r\t")
+local spaces=space^0
+local period=P(".")
+local periods=period*period
+local name=P("/")*C((1-space)^1)
+local unicodes,names={},{} 
+local function do_one(a,b)
+  unicodes[tonumber(a)]=tonumber(b,16)
+end
+local function do_range(a,b,c)
+  c=tonumber(c,16)
+  for i=tonumber(a),tonumber(b) do
+    unicodes[i]=c
+    c=c+1
+  end
+end
+local function do_name(a,b)
+  names[tonumber(a)]=b
+end
+local grammar=P { "start",
+  start=number*spaces*number*V("series"),
+  series=(spaces*(V("one")+V("range")+V("named")))^1,
+  one=(number*spaces*number)/do_one,
+  range=(number*periods*number*spaces*number)/do_range,
+  named=(number*spaces*name)/do_name
+}
+local function loadcidfile(filename)
+  local data=io.loaddata(filename)
+  if data then
+    unicodes,names={},{}
+    lpegmatch(grammar,data)
+    local supplement,registry,ordering=match(filename,"^(.-)%-(.-)%-()%.(.-)$")
+    return {
+      supplement=supplement,
+      registry=registry,
+      ordering=ordering,
+      filename=filename,
+      unicodes=unicodes,
+      names=names,
+    }
+  end
+end
+cid.loadfile=loadcidfile 
+local template="%s-%s-%s.cidmap"
+local function locate(registry,ordering,supplement)
+  local filename=format(template,registry,ordering,supplement)
+  local hashname=lower(filename)
+  local found=cidmap[hashname]
+  if not found then
+    if trace_loading then
+      report_otf("checking cidmap, registry %a, ordering %a, supplement %a, filename %a",registry,ordering,supplement,filename)
+    end
+    local fullname=resolvers.findfile(filename,'cid') or ""
+    if fullname~="" then
+      found=loadcidfile(fullname)
+      if found then
+        if trace_loading then
+          report_otf("using cidmap file %a",filename)
+        end
+        cidmap[hashname]=found
+        found.usedname=file.basename(filename)
+      end
+    end
+  end
+  return found
+end
+function cid.getmap(specification)
+  if not specification then
+    report_otf("invalid cidinfo specification, table expected")
+    return
+  end
+  local registry=specification.registry
+  local ordering=specification.ordering
+  local supplement=specification.supplement
+  local filename=format(registry,ordering,supplement)
+  local lowername=lower(filename)
+  local found=cidmap[lowername]
+  if found then
+    return found
+  end
+  if ordering=="Identity" then
+    local found={
+      supplement=supplement,
+      registry=registry,
+      ordering=ordering,
+      filename=filename,
+      unicodes={},
+      names={},
+    }
+    cidmap[lowername]=found
+    return found
+  end
+  if trace_loading then
+    report_otf("cidmap needed, registry %a, ordering %a, supplement %a",registry,ordering,supplement)
+  end
+  found=locate(registry,ordering,supplement)
+  if not found then
+    local supnum=tonumber(supplement)
+    local cidnum=nil
+    if supnum<cidmax then
+      for s=supnum+1,cidmax do
+        local c=locate(registry,ordering,s)
+        if c then
+          found,cidnum=c,s
+          break
+        end
+      end
+    end
+    if not found and supnum>0 then
+      for s=supnum-1,0,-1 do
+        local c=locate(registry,ordering,s)
+        if c then
+          found,cidnum=c,s
+          break
+        end
+      end
+    end
+    registry=lower(registry)
+    ordering=lower(ordering)
+    if found and cidnum>0 then
+      for s=0,cidnum-1 do
+        local filename=format(template,registry,ordering,s)
+        if not cidmap[filename] then
+          cidmap[filename]=found
+        end
+      end
+    end
+  end
+  return found
+end
+
+end --- [luaotfload, fontloader-2017-02-11.lua scope for “font-cid”] ---
+
+
+do  --- [luaotfload, fontloader-2017-02-11.lua scope for “font-map” 8708bde7467785c4d3b7afdaf2f9333a] ---
+
+if not modules then modules={} end modules ['font-map']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local tonumber,next,type=tonumber,next,type
+local match,format,find,concat,gsub,lower=string.match,string.format,string.find,table.concat,string.gsub,string.lower
+local P,R,S,C,Ct,Cc,lpegmatch=lpeg.P,lpeg.R,lpeg.S,lpeg.C,lpeg.Ct,lpeg.Cc,lpeg.match
+local floor=math.floor
+local formatters=string.formatters
+local sortedhash,sortedkeys=table.sortedhash,table.sortedkeys
+local trace_loading=false trackers.register("fonts.loading",function(v) trace_loading=v end)
+local trace_mapping=false trackers.register("fonts.mapping",function(v) trace_mapping=v end)
+local report_fonts=logs.reporter("fonts","loading") 
+local force_ligatures=false directives.register("fonts.mapping.forceligatures",function(v) force_ligatures=v end)
+local fonts=fonts or {}
+local mappings=fonts.mappings or {}
+fonts.mappings=mappings
+local allocate=utilities.storage.allocate
+local hex=R("AF","af","09")
+local hexfour=(hex*hex*hex^-2)/function(s) return tonumber(s,16) end
+local hexsix=(hex*hex*hex^-4)/function(s) return tonumber(s,16) end
+local dec=(R("09")^1)/tonumber
+local period=P(".")
+local unicode=(P("uni")+P("UNI"))*(hexfour*(period+P(-1))*Cc(false)+Ct(hexfour^1)*Cc(true)) 
+local ucode=(P("u")+P("U") )*(hexsix*(period+P(-1))*Cc(false)+Ct(hexsix^1)*Cc(true)) 
+local index=P("index")*dec*Cc(false)
+local parser=unicode+ucode+index
+local parsers={}
+local function makenameparser(str)
+  if not str or str=="" then
+    return parser
+  else
+    local p=parsers[str]
+    if not p then
+      p=P(str)*period*dec*Cc(false)
+      parsers[str]=p
+    end
+    return p
+  end
+end
+local f_single=formatters["%04X"]
+local f_double=formatters["%04X%04X"]
+local function tounicode16(unicode)
+  if unicode<0xD7FF or (unicode>0xDFFF and unicode<=0xFFFF) then
+    return f_single(unicode)
+  else
+    unicode=unicode-0x10000
+    return f_double(floor(unicode/1024)+0xD800,unicode%1024+0xDC00)
+  end
+end
+local function tounicode16sequence(unicodes)
+  local t={}
+  for l=1,#unicodes do
+    local u=unicodes[l]
+    if u<0xD7FF or (u>0xDFFF and u<=0xFFFF) then
+      t[l]=f_single(u)
+    else
+      u=u-0x10000
+      t[l]=f_double(floor(u/1024)+0xD800,u%1024+0xDC00)
+    end
+  end
+  return concat(t)
+end
+local function tounicode(unicode,name)
+  if type(unicode)=="table" then
+    local t={}
+    for l=1,#unicode do
+      local u=unicode[l]
+      if u<0xD7FF or (u>0xDFFF and u<=0xFFFF) then
+        t[l]=f_single(u)
+      else
+        u=u-0x10000
+        t[l]=f_double(floor(u/1024)+0xD800,u%1024+0xDC00)
+      end
+    end
+    return concat(t)
+  else
+    if unicode<0xD7FF or (unicode>0xDFFF and unicode<=0xFFFF) then
+      return f_single(unicode)
+    else
+      unicode=unicode-0x10000
+      return f_double(floor(unicode/1024)+0xD800,unicode%1024+0xDC00)
+    end
+  end
+end
+local function fromunicode16(str)
+  if #str==4 then
+    return tonumber(str,16)
+  else
+    local l,r=match(str,"(....)(....)")
+    return 0x10000+(tonumber(l,16)-0xD800)*0x400+tonumber(r,16)-0xDC00
+  end
+end
+mappings.makenameparser=makenameparser
+mappings.tounicode=tounicode
+mappings.tounicode16=tounicode16
+mappings.tounicode16sequence=tounicode16sequence
+mappings.fromunicode16=fromunicode16
+local ligseparator=P("_")
+local varseparator=P(".")
+local namesplitter=Ct(C((1-ligseparator-varseparator)^1)*(ligseparator*C((1-ligseparator-varseparator)^1))^0)
+do
+  local overloads=allocate {
+    IJ={ name="I_J",unicode={ 0x49,0x4A },mess=0x0132 },
+    ij={ name="i_j",unicode={ 0x69,0x6A },mess=0x0133 },
+    ff={ name="f_f",unicode={ 0x66,0x66 },mess=0xFB00 },
+    fi={ name="f_i",unicode={ 0x66,0x69 },mess=0xFB01 },
+    fl={ name="f_l",unicode={ 0x66,0x6C },mess=0xFB02 },
+    ffi={ name="f_f_i",unicode={ 0x66,0x66,0x69 },mess=0xFB03 },
+    ffl={ name="f_f_l",unicode={ 0x66,0x66,0x6C },mess=0xFB04 },
+    fj={ name="f_j",unicode={ 0x66,0x6A } },
+    fk={ name="f_k",unicode={ 0x66,0x6B } },
+  }
+  local o={}
+  for k,v in next,overloads do
+    local name=v.name
+    local mess=v.mess
+    if name then
+      o[name]=v
+    end
+    if mess then
+      o[mess]=v
+    end
+    o[k]=v
+  end
+  mappings.overloads=o
+end
+function mappings.addtounicode(data,filename,checklookups)
+  local resources=data.resources
+  local unicodes=resources.unicodes
+  if not unicodes then
+    if trace_mapping then
+      report_fonts("no unicode list, quitting tounicode for %a",filename)
+    end
+    return
+  end
+  local properties=data.properties
+  local descriptions=data.descriptions
+  local overloads=mappings.overloads
+  unicodes['space']=unicodes['space'] or 32
+  unicodes['hyphen']=unicodes['hyphen'] or 45
+  unicodes['zwj']=unicodes['zwj']  or 0x200D
+  unicodes['zwnj']=unicodes['zwnj']  or 0x200C
+  local private=fonts.constructors and fonts.constructors.privateoffset or 0xF0000 
+  local unicodevector=fonts.encodings.agl.unicodes or {} 
+  local contextvector=fonts.encodings.agl.ctxcodes or {} 
+  local missing={}
+  local nofmissing=0
+  local oparser=nil
+  local cidnames=nil
+  local cidcodes=nil
+  local cidinfo=properties.cidinfo
+  local usedmap=cidinfo and fonts.cid.getmap(cidinfo)
+  local uparser=makenameparser() 
+  if usedmap then
+     oparser=usedmap and makenameparser(cidinfo.ordering)
+     cidnames=usedmap.names
+     cidcodes=usedmap.unicodes
+  end
+  local ns=0
+  local nl=0
+  local dlist=sortedkeys(descriptions)
+  for i=1,#dlist do
+    local du=dlist[i]
+    local glyph=descriptions[du]
+    local name=glyph.name
+    if name then
+      local overload=overloads[name] or overloads[du]
+      if overload then
+        glyph.unicode=overload.unicode
+      else
+        local gu=glyph.unicode 
+        if not gu or gu==-1 or du>=private or (du>=0xE000 and du<=0xF8FF) or du==0xFFFE or du==0xFFFF then
+          local unicode=unicodevector[name] or contextvector[name]
+          if unicode then
+            glyph.unicode=unicode
+            ns=ns+1
+          end
+          if (not unicode) and usedmap then
+            local foundindex=lpegmatch(oparser,name)
+            if foundindex then
+              unicode=cidcodes[foundindex] 
+              if unicode then
+                glyph.unicode=unicode
+                ns=ns+1
+              else
+                local reference=cidnames[foundindex] 
+                if reference then
+                  local foundindex=lpegmatch(oparser,reference)
+                  if foundindex then
+                    unicode=cidcodes[foundindex]
+                    if unicode then
+                      glyph.unicode=unicode
+                      ns=ns+1
+                    end
+                  end
+                  if not unicode or unicode=="" then
+                    local foundcodes,multiple=lpegmatch(uparser,reference)
+                    if foundcodes then
+                      glyph.unicode=foundcodes
+                      if multiple then
+                        nl=nl+1
+                        unicode=true
+                      else
+                        ns=ns+1
+                        unicode=foundcodes
+                      end
+                    end
+                  end
+                end
+              end
+            end
+          end
+          if not unicode or unicode=="" then
+            local split=lpegmatch(namesplitter,name)
+            local nsplit=split and #split or 0 
+            if nsplit==0 then
+            elseif nsplit==1 then
+              local base=split[1]
+              local u=unicodes[base] or unicodevector[base] or contextvector[name]
+              if not u then
+              elseif type(u)=="table" then
+                if u[1]<private then
+                  unicode=u
+                  glyph.unicode=unicode
+                end
+              elseif u<private then
+                unicode=u
+                glyph.unicode=unicode
+              end
+            else
+              local t,n={},0
+              for l=1,nsplit do
+                local base=split[l]
+                local u=unicodes[base] or unicodevector[base] or contextvector[name]
+                if not u then
+                  break
+                elseif type(u)=="table" then
+                  if u[1]>=private then
+                    break
+                  end
+                  n=n+1
+                  t[n]=u[1]
+                else
+                  if u>=private then
+                    break
+                  end
+                  n=n+1
+                  t[n]=u
+                end
+              end
+              if n>0 then
+                if n==1 then
+                  unicode=t[1]
+                else
+                  unicode=t
+                end
+                glyph.unicode=unicode
+              end
+            end
+            nl=nl+1
+          end
+          if not unicode or unicode=="" then
+            local foundcodes,multiple=lpegmatch(uparser,name)
+            if foundcodes then
+              glyph.unicode=foundcodes
+              if multiple then
+                nl=nl+1
+                unicode=true
+              else
+                ns=ns+1
+                unicode=foundcodes
+              end
+            end
+          end
+          local r=overloads[unicode]
+          if r then
+            unicode=r.unicode
+            glyph.unicode=unicode
+          end
+          if not unicode then
+            missing[du]=true
+            nofmissing=nofmissing+1
+          end
+        end
+      end
+    else
+      local overload=overloads[du]
+      if overload then
+        glyph.unicode=overload.unicode
+      end
+    end
+  end
+  if type(checklookups)=="function" then
+    checklookups(data,missing,nofmissing)
+  end
+  local collected=false
+  local unicoded=0
+  for i=1,#dlist do
+    local du=dlist[i]
+    local glyph=descriptions[du]
+    if glyph.class=="ligature" and (force_ligatures or not glyph.unicode) then
+      if not collected then
+        collected=fonts.handlers.otf.readers.getcomponents(data)
+        if not collected then
+          break
+        end
+      end
+      local u=collected[du] 
+      if u then
+        local n=#u
+        for i=1,n do
+          if u[i]>private then
+            n=0
+            break
+          end
+        end
+        if n>0 then
+          if n>1 then
+            glyph.unicode=u
+          else
+            glyph.unicode=u[1]
+          end
+          unicoded=unicoded+1
+        end
+      end
+    end
+  end
+  if trace_mapping and unicoded>0 then
+    report_fonts("%n ligature tounicode mappings deduced from gsub ligature features",unicoded)
+  end
+  if trace_mapping then
+    for i=1,#dlist do
+      local du=dlist[i]
+      local glyph=descriptions[du]
+      local name=glyph.name or "-"
+      local index=glyph.index or 0
+      local unicode=glyph.unicode
+      if unicode then
+        if type(unicode)=="table" then
+          local unicodes={}
+          for i=1,#unicode do
+            unicodes[i]=formatters("%U",unicode[i])
+          end
+          report_fonts("internal slot %U, name %a, unicode %U, tounicode % t",index,name,du,unicodes)
+        else
+          report_fonts("internal slot %U, name %a, unicode %U, tounicode %U",index,name,du,unicode)
+        end
+      else
+        report_fonts("internal slot %U, name %a, unicode %U",index,name,du)
+      end
+    end
+  end
+  if trace_loading and (ns>0 or nl>0) then
+    report_fonts("%s tounicode entries added, ligatures %s",nl+ns,ns)
+  end
+end
+
+end --- [luaotfload, fontloader-2017-02-11.lua scope for “font-map”] ---
+
+
+do  --- [luaotfload, fontloader-2017-02-11.lua scope for “font-oti” 8f48c06a1d632febd7231ad5dfadfc53] ---
+
+if not modules then modules={} end modules ['font-oti']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local lower=string.lower
+local fonts=fonts
+local constructors=fonts.constructors
+local otf=constructors.handlers.otf
+local otffeatures=constructors.features.otf
+local registerotffeature=otffeatures.register
+local otftables=otf.tables or {}
+otf.tables=otftables
+local allocate=utilities.storage.allocate
+registerotffeature {
+  name="features",
+  description="initialization of feature handler",
+  default=true,
+}
+local function setmode(tfmdata,value)
+  if value then
+    tfmdata.properties.mode=lower(value)
+  end
+end
+otf.modeinitializer=setmode
+local function setlanguage(tfmdata,value)
+  if value then
+    local cleanvalue=lower(value)
+    local languages=otftables and otftables.languages
+    local properties=tfmdata.properties
+    if not languages then
+      properties.language=cleanvalue
+    elseif languages[value] then
+      properties.language=cleanvalue
+    else
+      properties.language="dflt"
+    end
+  end
+end
+local function setscript(tfmdata,value)
+  if value then
+    local cleanvalue=lower(value)
+    local scripts=otftables and otftables.scripts
+    local properties=tfmdata.properties
+    if not scripts then
+      properties.script=cleanvalue
+    elseif scripts[value] then
+      properties.script=cleanvalue
+    else
+      properties.script="dflt"
+    end
+  end
+end
+registerotffeature {
+  name="mode",
+  description="mode",
+  initializers={
+    base=setmode,
+    node=setmode,
+    plug=setmode,
+  }
+}
+registerotffeature {
+  name="language",
+  description="language",
+  initializers={
+    base=setlanguage,
+    node=setlanguage,
+    plug=setlanguage,
+  }
+}
+registerotffeature {
+  name="script",
+  description="script",
+  initializers={
+    base=setscript,
+    node=setscript,
+    plug=setscript,
+  }
+}
+otftables.featuretypes=allocate {
+  gpos_single="position",
+  gpos_pair="position",
+  gpos_cursive="position",
+  gpos_mark2base="position",
+  gpos_mark2ligature="position",
+  gpos_mark2mark="position",
+  gpos_context="position",
+  gpos_contextchain="position",
+  gsub_single="substitution",
+  gsub_multiple="substitution",
+  gsub_alternate="substitution",
+  gsub_ligature="substitution",
+  gsub_context="substitution",
+  gsub_contextchain="substitution",
+  gsub_reversecontextchain="substitution",
+  gsub_reversesub="substitution",
+}
+function otffeatures.checkeddefaultscript(featuretype,autoscript,scripts)
+  if featuretype=="position" then
+    local default=scripts.dflt
+    if default then
+      if autoscript=="position" or autoscript==true then
+        return default
+      else
+        report_otf("script feature %s not applied, enable default positioning")
+      end
+    else
+    end
+  elseif featuretype=="substitution" then
+    local default=scripts.dflt
+    if default then
+      if autoscript=="substitution" or autoscript==true then
+        return default
+      end
+    end
+  end
+end
+function otffeatures.checkeddefaultlanguage(featuretype,autolanguage,languages)
+  if featuretype=="position" then
+    local default=languages.dflt
+    if default then
+      if autolanguage=="position" or autolanguage==true then
+        return default
+      else
+        report_otf("language feature %s not applied, enable default positioning")
+      end
+    else
+    end
+  elseif featuretype=="substitution" then
+    local default=languages.dflt
+    if default then
+      if autolanguage=="substitution" or autolanguage==true then
+        return default
+      end
+    end
+  end
+end
+
+end --- [luaotfload, fontloader-2017-02-11.lua scope for “font-oti”] ---
+
+
+do  --- [luaotfload, fontloader-2017-02-11.lua scope for “font-otr” 2bd0085b78027f261218d63034f43474] ---
+
+if not modules then modules={} end modules ['font-otr']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local next,type,unpack=next,type,unpack
+local byte,lower,char,strip,gsub=string.byte,string.lower,string.char,string.strip,string.gsub
+local bittest=bit32.btest
+local concat,remove,unpack,fastcopy=table.concat,table.remov,table.unpack,table.fastcopy
+local floor,abs,sqrt,round=math.floor,math.abs,math.sqrt,math.round
+local P,R,S,C,Cs,Cc,Ct,Carg,Cmt=lpeg.P,lpeg.R,lpeg.S,lpeg.C,lpeg.Cs,lpeg.Cc,lpeg.Ct,lpeg.Carg,lpeg.Cmt
+local lpegmatch=lpeg.match
+local setmetatableindex=table.setmetatableindex
+local formatters=string.formatters
+local sortedkeys=table.sortedkeys
+local sortedhash=table.sortedhash
+local stripstring=string.strip
+local utf16_to_utf8_be=utf.utf16_to_utf8_be
+local report=logs.reporter("otf reader")
+local trace_cmap=false 
+fonts=fonts or {}
+local handlers=fonts.handlers or {}
+fonts.handlers=handlers
+local otf=handlers.otf or {}
+handlers.otf=otf
+local readers=otf.readers or {}
+otf.readers=readers
+local streamreader=utilities.files  
+local streamwriter=utilities.files
+readers.streamreader=streamreader
+readers.streamwriter=streamwriter
+local openfile=streamreader.open
+local closefile=streamreader.close
+local setposition=streamreader.setposition
+local skipshort=streamreader.skipshort
+local readbytes=streamreader.readbytes
+local readstring=streamreader.readstring
+local readbyte=streamreader.readcardinal1 
+local readushort=streamreader.readcardinal2 
+local readuint=streamreader.readcardinal3 
+local readulong=streamreader.readcardinal4
+local readshort=streamreader.readinteger2  
+local readlong=streamreader.readinteger4  
+local readfixed=streamreader.readfixed4
+local readfword=readshort          
+local readufword=readushort         
+local readoffset=readushort
+local read2dot14=streamreader.read2dot14   
+function streamreader.readtag(f)
+  return lower(strip(readstring(f,4)))
+end
+local function readlongdatetime(f)
+  local a,b,c,d,e,f,g,h=readbytes(f,8)
+  return 0x100000000*d+0x1000000*e+0x10000*f+0x100*g+h
+end
+local tableversion=0.004
+readers.tableversion=tableversion
+local privateoffset=fonts.constructors and fonts.constructors.privateoffset or 0xF0000 
+local reportedskipped={}
+local function reportskippedtable(tag)
+  if not reportedskipped[tag] then
+    report("loading of table %a skipped (reported once only)",tag)
+    reportedskipped[tag]=true
+  end
+end
+local reservednames={ [0]="copyright",
+  "family",
+  "subfamily",
+  "uniqueid",
+  "fullname",
+  "version",
+  "postscriptname",
+  "trademark",
+  "manufacturer",
+  "designer",
+  "description",
+  "vendorurl",
+  "designerurl",
+  "license",
+  "licenseurl",
+  "reserved",
+  "typographicfamily",
+  "typographicsubfamily",
+  "compatiblefullname",
+  "sampletext",
+  "cidfindfontname",
+  "wwsfamily",
+  "wwssubfamily",
+  "lightbackgroundpalette",
+  "darkbackgroundpalette",
+}
+local platforms={ [0]="unicode",
+  "macintosh",
+  "iso",
+  "windows",
+  "custom",
+}
+local encodings={
+  unicode={ [0]="unicode 1.0 semantics",
+    "unicode 1.1 semantics",
+    "iso/iec 10646",
+    "unicode 2.0 bmp",
+    "unicode 2.0 full",
+    "unicode variation sequences",
+    "unicode full repertoire",
+  },
+  macintosh={ [0]="roman","japanese","chinese (traditional)","korean","arabic","hebrew","greek","russian",
+    "rsymbol","devanagari","gurmukhi","gujarati","oriya","bengali","tamil","telugu","kannada",
+    "malayalam","sinhalese","burmese","khmer","thai","laotian","georgian","armenian",
+    "chinese (simplified)","tibetan","mongolian","geez","slavic","vietnamese","sindhi",
+    "uninterpreted",
+  },
+  iso={ [0]="7-bit ascii",
+    "iso 10646",
+    "iso 8859-1",
+  },
+  windows={ [0]="symbol",
+    "unicode bmp",
+    "shiftjis",
+    "prc",
+    "big5",
+    "wansung",
+    "johab",
+    "reserved 7",
+    "reserved 8",
+    "reserved 9",
+    "unicode ucs-4",
+  },
+  custom={
+  }
+}
+local decoders={
+  unicode={},
+  macintosh={},
+  iso={},
+  windows={
+    ["unicode semantics"]=utf16_to_utf8_be,
+    ["unicode bmp"]=utf16_to_utf8_be,
+    ["unicode full"]=utf16_to_utf8_be,
+    ["unicode 1.0 semantics"]=utf16_to_utf8_be,
+    ["unicode 1.1 semantics"]=utf16_to_utf8_be,
+    ["unicode 2.0 bmp"]=utf16_to_utf8_be,
+    ["unicode 2.0 full"]=utf16_to_utf8_be,
+    ["unicode variation sequences"]=utf16_to_utf8_be,
+    ["unicode full repertoire"]=utf16_to_utf8_be,
+  },
+  custom={},
+}
+local languages={
+  unicode={
+    [ 0]="english",
+  },
+  macintosh={
+    [ 0]="english",
+  },
+  iso={},
+  windows={
+    [0x0409]="english - united states",
+  },
+  custom={},
+}
+local standardromanencoding={ [0]=
+  "notdef",".null","nonmarkingreturn","space","exclam","quotedbl",
+  "numbersign","dollar","percent","ampersand","quotesingle","parenleft",
+  "parenright","asterisk","plus","comma","hyphen","period","slash",
+  "zero","one","two","three","four","five","six","seven","eight",
+  "nine","colon","semicolon","less","equal","greater","question","at",
+  "A","B","C","D","E","F","G","H","I","J","K","L","M","N","O",
+  "P","Q","R","S","T","U","V","W","X","Y","Z","bracketleft",
+  "backslash","bracketright","asciicircum","underscore","grave","a","b",
+  "c","d","e","f","g","h","i","j","k","l","m","n","o","p","q",
+  "r","s","t","u","v","w","x","y","z","braceleft","bar",
+  "braceright","asciitilde","Adieresis","Aring","Ccedilla","Eacute",
+  "Ntilde","Odieresis","Udieresis","aacute","agrave","acircumflex",
+  "adieresis","atilde","aring","ccedilla","eacute","egrave",
+  "ecircumflex","edieresis","iacute","igrave","icircumflex","idieresis",
+  "ntilde","oacute","ograve","ocircumflex","odieresis","otilde","uacute",
+  "ugrave","ucircumflex","udieresis","dagger","degree","cent","sterling",
+  "section","bullet","paragraph","germandbls","registered","copyright",
+  "trademark","acute","dieresis","notequal","AE","Oslash","infinity",
+  "plusminus","lessequal","greaterequal","yen","mu","partialdiff",
+  "summation","product","pi","integral","ordfeminine","ordmasculine",
+  "Omega","ae","oslash","questiondown","exclamdown","logicalnot",
+  "radical","florin","approxequal","Delta","guillemotleft",
+  "guillemotright","ellipsis","nonbreakingspace","Agrave","Atilde",
+  "Otilde","OE","oe","endash","emdash","quotedblleft","quotedblright",
+  "quoteleft","quoteright","divide","lozenge","ydieresis","Ydieresis",
+  "fraction","currency","guilsinglleft","guilsinglright","fi","fl",
+  "daggerdbl","periodcentered","quotesinglbase","quotedblbase",
+  "perthousand","Acircumflex","Ecircumflex","Aacute","Edieresis","Egrave",
+  "Iacute","Icircumflex","Idieresis","Igrave","Oacute","Ocircumflex",
+  "apple","Ograve","Uacute","Ucircumflex","Ugrave","dotlessi",
+  "circumflex","tilde","macron","breve","dotaccent","ring","cedilla",
+  "hungarumlaut","ogonek","caron","Lslash","lslash","Scaron","scaron",
+  "Zcaron","zcaron","brokenbar","Eth","eth","Yacute","yacute","Thorn",
+  "thorn","minus","multiply","onesuperior","twosuperior","threesuperior",
+  "onehalf","onequarter","threequarters","franc","Gbreve","gbreve",
+  "Idotaccent","Scedilla","scedilla","Cacute","cacute","Ccaron","ccaron",
+  "dcroat",
+}
+local weights={
+  [100]="thin",
+  [200]="extralight",
+  [300]="light",
+  [400]="normal",
+  [500]="medium",
+  [600]="semibold",
+  [700]="bold",
+  [800]="extrabold",
+  [900]="black",
+}
+local widths={
+  [1]="ultracondensed",
+  [2]="extracondensed",
+  [3]="condensed",
+  [4]="semicondensed",
+  [5]="normal",
+  [6]="semiexpanded",
+  [7]="expanded",
+  [8]="extraexpanded",
+  [9]="ultraexpanded",
+}
+setmetatableindex(weights,function(t,k)
+  local r=floor((k+50)/100)*100
+  local v=(r>900 and "black") or rawget(t,r) or "normal"
+  return v
+end)
+setmetatableindex(widths,function(t,k)
+  return "normal"
+end)
+local panoseweights={
+  [ 0]="normal",
+  [ 1]="normal",
+  [ 2]="verylight",
+  [ 3]="light",
+  [ 4]="thin",
+  [ 5]="book",
+  [ 6]="medium",
+  [ 7]="demi",
+  [ 8]="bold",
+  [ 9]="heavy",
+  [10]="black",
+}
+local panosewidths={
+  [ 0]="normal",
+  [ 1]="normal",
+  [ 2]="normal",
+  [ 3]="normal",
+  [ 4]="normal",
+  [ 5]="expanded",
+  [ 6]="condensed",
+  [ 7]="veryexpanded",
+  [ 8]="verycondensed",
+  [ 9]="monospaced",
+}
+local platformnames={
+  postscriptname=true,
+  fullname=true,
+  family=true,
+  subfamily=true,
+  typographicfamily=true,
+  typographicsubfamily=true,
+  compatiblefullname=true,
+}
+function readers.name(f,fontdata,specification)
+  local datatable=fontdata.tables.name
+  if datatable then
+    setposition(f,datatable.offset)
+    local format=readushort(f)
+    local nofnames=readushort(f)
+    local offset=readushort(f)
+    local start=datatable.offset+offset
+    local namelists={
+      unicode={},
+      windows={},
+      macintosh={},
+    }
+    for i=1,nofnames do
+      local platform=platforms[readushort(f)]
+      if platform then
+        local namelist=namelists[platform]
+        if namelist then
+          local encoding=readushort(f)
+          local language=readushort(f)
+          local encodings=encodings[platform]
+          local languages=languages[platform]
+          if encodings and languages then
+            local encoding=encodings[encoding]
+            local language=languages[language]
+            if encoding and language then
+              local name=reservednames[readushort(f)]
+              if name then
+                namelist[#namelist+1]={
+                  platform=platform,
+                  encoding=encoding,
+                  language=language,
+                  name=name,
+                  length=readushort(f),
+                  offset=start+readushort(f),
+                }
+              else
+                skipshort(f,2)
+              end
+            else
+              skipshort(f,3)
+            end
+          else
+            skipshort(f,3)
+          end
+        else
+          skipshort(f,5)
+        end
+      else
+        skipshort(f,5)
+      end
+    end
+    local names={}
+    local done={}
+    local function filter(platform,e,l)
+      local namelist=namelists[platform]
+      for i=1,#namelist do
+        local name=namelist[i]
+        local nametag=name.name
+        if not done[nametag] then
+          local encoding=name.encoding
+          local language=name.language
+          if (not e or encoding==e) and (not l or language==l) then
+            setposition(f,name.offset)
+            local content=readstring(f,name.length)
+            local decoder=decoders[platform]
+            if decoder then
+              decoder=decoder[encoding]
+            end
+            if decoder then
+              content=decoder(content)
+            end
+            names[nametag]={
+              content=content,
+              platform=platform,
+              encoding=encoding,
+              language=language,
+            }
+            done[nametag]=true
+          end
+        end
+      end
+    end
+    filter("windows","unicode bmp","english - united states")
+    filter("macintosh","roman","english")
+    filter("windows")
+    filter("macintosh")
+    filter("unicode")
+    fontdata.names=names
+    if specification.platformnames then
+      local collected={}
+      for platform,namelist in next,namelists do
+        local filtered=false
+        for i=1,#namelist do
+          local entry=namelist[i]
+          local name=entry.name
+          if platformnames[name] then
+            setposition(f,entry.offset)
+            local content=readstring(f,entry.length)
+            local encoding=entry.encoding
+            local decoder=decoders[platform]
+            if decoder then
+              decoder=decoder[encoding]
+            end
+            if decoder then
+              content=decoder(content)
+            end
+            if filtered then
+              filtered[name]=content
+            else
+              filtered={ [name]=content }
+            end
+          end
+        end
+        if filtered then
+          collected[platform]=filtered
+        end
+      end
+      fontdata.platformnames=collected
+    end
+  else
+    fontdata.names={}
+  end
+end
+local validutf=lpeg.patterns.validutf8
+local function getname(fontdata,key)
+  local names=fontdata.names
+  if names then
+    local value=names[key]
+    if value then
+      local content=value.content
+      return lpegmatch(validutf,content) and content or nil
+    end
+  end
+end
+readers["os/2"]=function(f,fontdata)
+  local datatable=fontdata.tables["os/2"]
+  if datatable then
+    setposition(f,datatable.offset)
+    local version=readushort(f)
+    local windowsmetrics={
+      version=version,
+      averagewidth=readshort(f),
+      weightclass=readushort(f),
+      widthclass=readushort(f),
+      fstype=readushort(f),
+      subscriptxsize=readshort(f),
+      subscriptysize=readshort(f),
+      subscriptxoffset=readshort(f),
+      subscriptyoffset=readshort(f),
+      superscriptxsize=readshort(f),
+      superscriptysize=readshort(f),
+      superscriptxoffset=readshort(f),
+      superscriptyoffset=readshort(f),
+      strikeoutsize=readshort(f),
+      strikeoutpos=readshort(f),
+      familyclass=readshort(f),
+      panose={ readbytes(f,10) },
+      unicoderanges={ readulong(f),readulong(f),readulong(f),readulong(f) },
+      vendor=readstring(f,4),
+      fsselection=readushort(f),
+      firstcharindex=readushort(f),
+      lastcharindex=readushort(f),
+      typoascender=readshort(f),
+      typodescender=readshort(f),
+      typolinegap=readshort(f),
+      winascent=readushort(f),
+      windescent=readushort(f),
+    }
+    if version>=1 then
+      windowsmetrics.codepageranges={ readulong(f),readulong(f) }
+    end
+    if version>=3 then
+      windowsmetrics.xheight=readshort(f)
+      windowsmetrics.capheight=readshort(f)
+      windowsmetrics.defaultchar=readushort(f)
+      windowsmetrics.breakchar=readushort(f)
+    end
+    windowsmetrics.weight=windowsmetrics.weightclass and weights[windowsmetrics.weightclass]
+    windowsmetrics.width=windowsmetrics.widthclass and widths [windowsmetrics.widthclass]
+    windowsmetrics.panoseweight=panoseweights[windowsmetrics.panose[3]]
+    windowsmetrics.panosewidth=panosewidths [windowsmetrics.panose[4]]
+    fontdata.windowsmetrics=windowsmetrics
+  else
+    fontdata.windowsmetrics={}
+  end
+end
+readers.head=function(f,fontdata)
+  local datatable=fontdata.tables.head
+  if datatable then
+    setposition(f,datatable.offset)
+    local fontheader={
+      version=readfixed(f),
+      revision=readfixed(f),
+      checksum=readulong(f),
+      magic=readulong(f),
+      flags=readushort(f),
+      units=readushort(f),
+      created=readlongdatetime(f),
+      modified=readlongdatetime(f),
+      xmin=readshort(f),
+      ymin=readshort(f),
+      xmax=readshort(f),
+      ymax=readshort(f),
+      macstyle=readushort(f),
+      smallpixels=readushort(f),
+      directionhint=readshort(f),
+      indextolocformat=readshort(f),
+      glyphformat=readshort(f),
+    }
+    fontdata.fontheader=fontheader
+  else
+    fontdata.fontheader={}
+  end
+  fontdata.nofglyphs=0
+end
+readers.hhea=function(f,fontdata,specification)
+  if specification.details then
+    local datatable=fontdata.tables.hhea
+    if datatable then
+      setposition(f,datatable.offset)
+      fontdata.horizontalheader={
+        version=readfixed(f),
+        ascender=readfword(f),
+        descender=readfword(f),
+        linegap=readfword(f),
+        maxadvancewidth=readufword(f),
+        minleftsidebearing=readfword(f),
+        minrightsidebearing=readfword(f),
+        maxextent=readfword(f),
+        caretsloperise=readshort(f),
+        caretsloperun=readshort(f),
+        caretoffset=readshort(f),
+        reserved_1=readshort(f),
+        reserved_2=readshort(f),
+        reserved_3=readshort(f),
+        reserved_4=readshort(f),
+        metricdataformat=readshort(f),
+        nofmetrics=readushort(f),
+      }
+    else
+      fontdata.horizontalheader={
+        nofmetrics=0,
+      }
+    end
+  end
+end
+readers.vhea=function(f,fontdata,specification)
+  if specification.details then
+    local datatable=fontdata.tables.vhea
+    if datatable then
+      setposition(f,datatable.offset)
+      local version=readfixed(f)
+      fontdata.verticalheader={
+        version=version,
+        ascender=readfword(f),
+        descender=readfword(f),
+        linegap=readfword(f),
+        maxadvanceheight=readufword(f),
+        mintopsidebearing=readfword(f),
+        minbottomsidebearing=readfword(f),
+        maxextent=readfword(f),
+        caretsloperise=readshort(f),
+        caretsloperun=readshort(f),
+        caretoffset=readshort(f),
+        reserved_1=readshort(f),
+        reserved_2=readshort(f),
+        reserved_3=readshort(f),
+        reserved_4=readshort(f),
+        metricdataformat=readshort(f),
+        nofmetrics=readushort(f),
+      }
+    else
+      fontdata.verticalheader={
+        nofmetrics=0,
+      }
+    end
+  end
+end
+readers.maxp=function(f,fontdata,specification)
+  if specification.details then
+    local datatable=fontdata.tables.maxp
+    if datatable then
+      setposition(f,datatable.offset)
+      local version=readfixed(f)
+      local nofglyphs=readushort(f)
+      fontdata.nofglyphs=nofglyphs
+      if version==0.5 then
+        fontdata.maximumprofile={
+          version=version,
+          nofglyphs=nofglyphs,
+        }
+        return
+      elseif version==1.0 then
+        fontdata.maximumprofile={
+          version=version,
+          nofglyphs=nofglyphs,
+          points=readushort(f),
+          contours=readushort(f),
+          compositepoints=readushort(f),
+          compositecontours=readushort(f),
+          zones=readushort(f),
+          twilightpoints=readushort(f),
+          storage=readushort(f),
+          functiondefs=readushort(f),
+          instructiondefs=readushort(f),
+          stackelements=readushort(f),
+          sizeofinstructions=readushort(f),
+          componentelements=readushort(f),
+          componentdepth=readushort(f),
+        }
+        return
+      end
+    end
+    fontdata.maximumprofile={
+      version=version,
+      nofglyphs=0,
+    }
+  end
+end
+readers.hmtx=function(f,fontdata,specification)
+  if specification.glyphs then
+    local datatable=fontdata.tables.hmtx
+    if datatable then
+      setposition(f,datatable.offset)
+      local horizontalheader=fontdata.horizontalheader
+      local nofmetrics=horizontalheader.nofmetrics
+      local glyphs=fontdata.glyphs
+      local nofglyphs=fontdata.nofglyphs
+      local width=0 
+      local leftsidebearing=0
+      for i=0,nofmetrics-1 do
+        local glyph=glyphs[i]
+        width=readshort(f)
+        leftsidebearing=readshort(f)
+        if width~=0 then
+          glyph.width=width
+        end
+      end
+      for i=nofmetrics,nofglyphs-1 do
+        local glyph=glyphs[i]
+        if width~=0 then
+          glyph.width=width
+        end
+      end
+    end
+  end
+end
+readers.vmtx=function(f,fontdata,specification)
+  if specification.glyphs then
+    local datatable=fontdata.tables.vmtx
+    if datatable then
+      setposition(f,datatable.offset)
+      local verticalheader=fontdata.verticalheader
+      local nofmetrics=verticalheader.nofmetrics
+      local glyphs=fontdata.glyphs
+      local nofglyphs=fontdata.nofglyphs
+      local vheight=0
+      local vdefault=verticalheader.ascender+verticalheader.descender
+      local topsidebearing=0
+      for i=0,nofmetrics-1 do
+        local glyph=glyphs[i]
+        vheight=readshort(f)
+        topsidebearing=readshort(f)
+        if vheight~=0 and vheight~=vdefault then
+          glyph.vheight=vheight
+        end
+      end
+      for i=nofmetrics,nofglyphs-1 do
+        local glyph=glyphs[i]
+        if vheight~=0 and vheight~=vdefault then
+          glyph.vheight=vheight
+        end
+      end
+    end
+  end
+end
+readers.vorg=function(f,fontdata,specification)
+  if specification.glyphs then
+    local datatable=fontdata.tables.vorg
+    if datatable then
+      report("todo: %s","vorg")
+    end
+  end
+end
+readers.post=function(f,fontdata,specification)
+  local datatable=fontdata.tables.post
+  if datatable then
+    setposition(f,datatable.offset)
+    local version=readfixed(f)
+    fontdata.postscript={
+      version=version,
+      italicangle=round(1000*readfixed(f))/1000,
+      underlineposition=readfword(f),
+      underlinethickness=readfword(f),
+      monospaced=readulong(f),
+      minmemtype42=readulong(f),
+      maxmemtype42=readulong(f),
+      minmemtype1=readulong(f),
+      maxmemtype1=readulong(f),
+    }
+    if not specification.glyphs then
+    elseif version==1.0 then
+      for index=0,#standardromanencoding do
+        glyphs[index].name=standardromanencoding[index]
+      end
+    elseif version==2.0 then
+      local glyphs=fontdata.glyphs
+      local nofglyphs=readushort(f)
+      local indices={}
+      local names={}
+      local maxnames=0
+      for i=0,nofglyphs-1 do
+        local nameindex=readushort(f)
+        if nameindex>=258 then
+          maxnames=maxnames+1
+          nameindex=nameindex-257
+          indices[nameindex]=i
+        else
+          glyphs[i].name=standardromanencoding[nameindex]
+        end
+      end
+      for i=1,maxnames do
+        local mapping=indices[i]
+        if not mapping then
+          report("quit post name fetching at %a of %a: %s",i,maxnames,"no index")
+          break
+        else
+          local length=readbyte(f)
+          if length>0 then
+            glyphs[mapping].name=readstring(f,length)
+          else
+            report("quit post name fetching at %a of %a: %s",i,maxnames,"overflow")
+            break
+          end
+        end
+      end
+    elseif version==2.5 then
+    elseif version==3.0 then
+    end
+  else
+    fontdata.postscript={}
+  end
+end
+readers.cff=function(f,fontdata,specification)
+  if specification.glyphs then
+    reportskippedtable("cff")
+  end
+end
+local formatreaders={}
+local duplicatestoo=true
+local sequence={
+  { 3,1,4 },
+  { 3,10,12 },
+  { 0,3,4 },
+  { 0,1,4 },
+  { 0,0,6 },
+  { 3,0,6 },
+  { 0,5,14 },
+  { 3,10,13 },
+}
+local supported={}
+for i=1,#sequence do
+  local sp,se,sf=unpack(sequence[i])
+  local p=supported[sp]
+  if not p then
+    p={}
+    supported[sp]=p
+  end
+  local e=p[se]
+  if not e then
+    e={}
+    p[se]=e
+  end
+  e[sf]=true
+end
+formatreaders[4]=function(f,fontdata,offset)
+  setposition(f,offset+2)
+  local length=readushort(f) 
+  local language=readushort(f)
+  local nofsegments=readushort(f)/2
+  skipshort(f,3)
+  local endchars={}
+  local startchars={}
+  local deltas={}
+  local offsets={}
+  local indices={}
+  local mapping=fontdata.mapping
+  local glyphs=fontdata.glyphs
+  local duplicates=fontdata.duplicates
+  local nofdone=0
+  for i=1,nofsegments do
+    endchars[i]=readushort(f)
+  end
+  local reserved=readushort(f) 
+  for i=1,nofsegments do
+    startchars[i]=readushort(f)
+  end
+  for i=1,nofsegments do
+    deltas[i]=readshort(f)
+  end
+  for i=1,nofsegments do
+    offsets[i]=readushort(f)
+  end
+  local size=(length-2*2-5*2-4*nofsegments*2)/2
+  for i=1,size-1 do
+    indices[i]=readushort(f)
+  end
+  for segment=1,nofsegments do
+    local startchar=startchars[segment]
+    local endchar=endchars[segment]
+    local offset=offsets[segment]
+    local delta=deltas[segment]
+    if startchar==0xFFFF and endchar==0xFFFF then
+    elseif startchar==0xFFFF and offset==0 then
+    elseif offset==0xFFFF then
+    elseif offset==0 then
+      if trace_cmap then
+        report("format 4.%i segment %2i from %C upto %C at index %H",1,segment,startchar,endchar,(startchar+delta)%65536)
+      end
+      for unicode=startchar,endchar do
+        local index=(unicode+delta)%65536
+        if index and index>0 then
+          local glyph=glyphs[index]
+          if glyph then
+            local gu=glyph.unicode
+            if not gu then
+              glyph.unicode=unicode
+              nofdone=nofdone+1
+            elseif gu~=unicode then
+              if duplicatestoo then
+                local d=duplicates[gu]
+                if d then
+                  d[unicode]=true
+                else
+                  duplicates[gu]={ [unicode]=true }
+                end
+              else
+                report("duplicate case 1: %C %04i %s",unicode,index,glyphs[index].name)
+              end
+            end
+            if not mapping[index] then
+              mapping[index]=unicode
+            end
+          end
+        end
+      end
+    else
+      local shift=(segment-nofsegments+offset/2)-startchar
+      if trace_cmap then
+        report("format 4.%i segment %2i from %C upto %C at index %H",0,segment,startchar,endchar,(startchar+delta)%65536)
+      end
+      for unicode=startchar,endchar do
+        local slot=shift+unicode
+        local index=indices[slot]
+        if index and index>0 then
+          index=(index+delta)%65536
+          local glyph=glyphs[index]
+          if glyph then
+            local gu=glyph.unicode
+            if not gu then
+              glyph.unicode=unicode
+              nofdone=nofdone+1
+            elseif gu~=unicode then
+              if duplicatestoo then
+                local d=duplicates[gu]
+                if d then
+                  d[unicode]=true
+                else
+                  duplicates[gu]={ [unicode]=true }
+                end
+              else
+                report("duplicate case 2: %C %04i %s",unicode,index,glyphs[index].name)
+              end
+            end
+            if not mapping[index] then
+              mapping[index]=unicode
+            end
+          end
+        end
+      end
+    end
+  end
+  return nofdone
+end
+formatreaders[6]=function(f,fontdata,offset)
+  setposition(f,offset) 
+  local format=readushort(f)
+  local length=readushort(f)
+  local language=readushort(f)
+  local mapping=fontdata.mapping
+  local glyphs=fontdata.glyphs
+  local duplicates=fontdata.duplicates
+  local start=readushort(f)
+  local count=readushort(f)
+  local stop=start+count-1
+  local nofdone=0
+  if trace_cmap then
+    report("format 6 from %C to %C",2,start,stop)
+  end
+  for unicode=start,stop do
+    local index=readushort(f)
+    if index>0 then
+      local glyph=glyphs[index]
+      if glyph then
+        local gu=glyph.unicode
+        if not gu then
+          glyph.unicode=unicode
+          nofdone=nofdone+1
+        elseif gu~=unicode then
+        end
+        if not mapping[index] then
+          mapping[index]=unicode
+        end
+      end
+    end
+  end
+  return nofdone
+end
+formatreaders[12]=function(f,fontdata,offset)
+  setposition(f,offset+2+2+4+4) 
+  local mapping=fontdata.mapping
+  local glyphs=fontdata.glyphs
+  local duplicates=fontdata.duplicates
+  local nofgroups=readulong(f)
+  local nofdone=0
+  for i=1,nofgroups do
+    local first=readulong(f)
+    local last=readulong(f)
+    local index=readulong(f)
+    if trace_cmap then
+      report("format 12 from %C to %C starts at index %i",first,last,index)
+    end
+    for unicode=first,last do
+      local glyph=glyphs[index]
+      if glyph then
+        local gu=glyph.unicode
+        if not gu then
+          glyph.unicode=unicode
+          nofdone=nofdone+1
+        elseif gu~=unicode then
+          local d=duplicates[gu]
+          if d then
+            d[unicode]=true
+          else
+            duplicates[gu]={ [unicode]=true }
+          end
+        end
+        if not mapping[index] then
+          mapping[index]=unicode
+        end
+      end
+      index=index+1
+    end
+  end
+  return nofdone
+end
+formatreaders[13]=function(f,fontdata,offset)
+  setposition(f,offset+2+2+4+4) 
+  local mapping=fontdata.mapping
+  local glyphs=fontdata.glyphs
+  local duplicates=fontdata.duplicates
+  local nofgroups=readulong(f)
+  local nofdone=0
+  for i=1,nofgroups do
+    local first=readulong(f)
+    local last=readulong(f)
+    local index=readulong(f)
+    if first<privateoffset then
+      if trace_cmap then
+        report("format 13 from %C to %C get index %i",first,last,index)
+      end
+      local glyph=glyphs[index]
+      local unicode=glyph.unicode
+      if not unicode then
+        unicode=first
+        glyph.unicode=unicode
+        first=first+1
+      end
+      local list=duplicates[unicode]
+      mapping[index]=unicode
+      if not list then
+        list={}
+        duplicates[unicode]=list
+      end
+      if last>=privateoffset then
+        local limit=privateoffset-1
+        report("format 13 from %C to %C pruned to %C",first,last,limit)
+        last=limit
+      end
+      for unicode=first,last do
+        list[unicode]=true
+      end
+      nofdone=nofdone+last-first+1
+    else
+      report("format 13 from %C to %C ignored",first,last)
+    end
+  end
+  return nofdone
+end
+formatreaders[14]=function(f,fontdata,offset)
+  if offset and offset~=0 then
+    setposition(f,offset)
+    local format=readushort(f)
+    local length=readulong(f)
+    local nofrecords=readulong(f)
+    local records={}
+    local variants={}
+    local nofdone=0
+    fontdata.variants=variants
+    for i=1,nofrecords do
+      records[i]={
+        selector=readuint(f),
+        default=readulong(f),
+        other=readulong(f),
+      }
+    end
+    for i=1,nofrecords do
+      local record=records[i]
+      local selector=record.selector
+      local default=record.default
+      local other=record.other
+      local other=record.other
+      if other~=0 then
+        setposition(f,offset+other)
+        local mapping={}
+        local count=readulong(f)
+        for i=1,count do
+          mapping[readuint(f)]=readushort(f)
+        end
+        nofdone=nofdone+count
+        variants[selector]=mapping
+      end
+    end
+    return nofdone
+  else
+    return 0
+  end
+end
+local function checkcmap(f,fontdata,records,platform,encoding,format)
+  local data=records[platform]
+  if not data then
+    return 0
+  end
+  data=data[encoding]
+  if not data then
+    return 0
+  end
+  data=data[format]
+  if not data then
+    return 0
+  end
+  local reader=formatreaders[format]
+  if not reader then
+    return 0
+  end
+  local p=platforms[platform]
+  local e=encodings[p]
+  local n=reader(f,fontdata,data) or 0
+  report("cmap checked: platform %i (%s), encoding %i (%s), format %i, new unicodes %i",platform,p,encoding,e and e[encoding] or "?",format,n)
+  return n
+end
+function readers.cmap(f,fontdata,specification)
+  if specification.glyphs then
+    local datatable=fontdata.tables.cmap
+    if datatable then
+      local tableoffset=datatable.offset
+      setposition(f,tableoffset)
+      local version=readushort(f)
+      local noftables=readushort(f)
+      local records={}
+      local unicodecid=false
+      local variantcid=false
+      local variants={}
+      local duplicates=fontdata.duplicates or {}
+      fontdata.duplicates=duplicates
+      for i=1,noftables do
+        local platform=readushort(f)
+        local encoding=readushort(f)
+        local offset=readulong(f)
+        local record=records[platform]
+        if not record then
+          records[platform]={
+            [encoding]={
+              offsets={ offset },
+              formats={},
+            }
+          }
+        else
+          local subtables=record[encoding]
+          if not subtables then
+            record[encoding]={
+              offsets={ offset },
+              formats={},
+            }
+          else
+            local offsets=subtables.offsets
+            offsets[#offsets+1]=offset
+          end
+        end
+      end
+      report("found cmaps:")
+      for platform,record in sortedhash(records) do
+        local p=platforms[platform]
+        local e=encodings[p]
+        local sp=supported[platform]
+        local ps=p or "?"
+        if sp then
+          report("  platform %i: %s",platform,ps)
+        else
+          report("  platform %i: %s (unsupported)",platform,ps)
+        end
+        for encoding,subtables in sortedhash(record) do
+          local se=sp and sp[encoding]
+          local es=e and e[encoding] or "?"
+          if se then
+            report("    encoding %i: %s",encoding,es)
+          else
+            report("    encoding %i: %s (unsupported)",encoding,es)
+          end
+          local offsets=subtables.offsets
+          local formats=subtables.formats
+          for i=1,#offsets do
+            local offset=tableoffset+offsets[i]
+            setposition(f,offset)
+            formats[readushort(f)]=offset
+          end
+          record[encoding]=formats
+          local list=sortedkeys(formats)
+          for i=1,#list do
+            if not (se and se[list[i]]) then
+              list[i]=list[i].." (unsupported)"
+            end
+          end
+          report("      formats: % t",list)
+        end
+      end
+      local ok=false
+      for i=1,#sequence do
+        local sp,se,sf=unpack(sequence[i])
+        if checkcmap(f,fontdata,records,sp,se,sf)>0 then
+          ok=true
+        end
+      end
+      if not ok then
+        report("no useable unicode cmap found")
+      end
+      fontdata.cidmaps={
+        version=version,
+        noftables=noftables,
+        records=records,
+      }
+    else
+      fontdata.cidmaps={}
+    end
+  end
+end
+function readers.loca(f,fontdata,specification)
+  if specification.glyphs then
+    reportskippedtable("loca")
+  end
+end
+function readers.glyf(f,fontdata,specification) 
+  if specification.glyphs then
+    reportskippedtable("glyf")
+  end
+end
+function readers.colr(f,fontdata,specification)
+  if specification.glyphs then
+    reportskippedtable("colr")
+  end
+end
+function readers.cpal(f,fontdata,specification)
+  if specification.glyphs then
+    reportskippedtable("cpal")
+  end
+end
+function readers.svg(f,fontdata,specification)
+  if specification.glyphs then
+    reportskippedtable("svg")
+  end
+end
+function readers.kern(f,fontdata,specification)
+  if specification.kerns then
+    local datatable=fontdata.tables.kern
+    if datatable then
+      setposition(f,datatable.offset)
+      local version=readushort(f)
+      local noftables=readushort(f)
+      for i=1,noftables do
+        local version=readushort(f)
+        local length=readushort(f)
+        local coverage=readushort(f)
+        local format=bit32.rshift(coverage,8) 
+        if format==0 then
+          local nofpairs=readushort(f)
+          local searchrange=readushort(f)
+          local entryselector=readushort(f)
+          local rangeshift=readushort(f)
+          local kerns={}
+          local glyphs=fontdata.glyphs
+          for i=1,nofpairs do
+            local left=readushort(f)
+            local right=readushort(f)
+            local kern=readfword(f)
+            local glyph=glyphs[left]
+            local kerns=glyph.kerns
+            if kerns then
+              kerns[right]=kern
+            else
+              glyph.kerns={ [right]=kern }
+            end
+          end
+        elseif format==2 then
+          report("todo: kern classes")
+        else
+          report("todo: kerns")
+        end
+      end
+    end
+  end
+end
+function readers.gdef(f,fontdata,specification)
+  if specification.details then
+    reportskippedtable("gdef")
+  end
+end
+function readers.gsub(f,fontdata,specification)
+  if specification.details then
+    reportskippedtable("gsub")
+  end
+end
+function readers.gpos(f,fontdata,specification)
+  if specification.details then
+    reportskippedtable("gpos")
+  end
+end
+function readers.math(f,fontdata,specification)
+  if specification.glyphs then
+    reportskippedtable("math")
+  end
+end
+local function getinfo(maindata,sub,platformnames,rawfamilynames,metricstoo)
+  local fontdata=sub and maindata.subfonts and maindata.subfonts[sub] or maindata
+  local names=fontdata.names
+  local info=nil
+  if names then
+    local metrics=fontdata.windowsmetrics or {}
+    local postscript=fontdata.postscript   or {}
+    local fontheader=fontdata.fontheader   or {}
+    local cffinfo=fontdata.cffinfo    or {}
+    local filename=fontdata.filename
+    local weight=getname(fontdata,"weight") or (cffinfo and cffinfo.weight) or (metrics and metrics.weight)
+    local width=getname(fontdata,"width") or (cffinfo and cffinfo.width ) or (metrics and metrics.width )
+    local fontname=getname(fontdata,"postscriptname")
+    local fullname=getname(fontdata,"fullname")
+    local family=getname(fontdata,"family")
+    local subfamily=getname(fontdata,"subfamily")
+    local familyname=getname(fontdata,"typographicfamily")
+    local subfamilyname=getname(fontdata,"typographicsubfamily")
+    local compatiblename=getname(fontdata,"compatiblefullname") 
+    if rawfamilynames then
+    else
+      if not  familyname then  familyname=family end
+      if not subfamilyname then subfamilyname=subfamily end
+    end
+    info={ 
+      subfontindex=fontdata.subfontindex or sub or 0,
+      version=getname(fontdata,"version"),
+      fontname=fontname,
+      fullname=fullname,
+      family=family,
+      subfamily=subfamily,
+      familyname=familyname,
+      subfamilyname=subfamilyname,
+      compatiblename=compatiblename,
+      weight=weight and lower(weight),
+      width=width and lower(width),
+      pfmweight=metrics.weightclass or 400,
+      pfmwidth=metrics.widthclass or 5,
+      panosewidth=metrics.panosewidth,
+      panoseweight=metrics.panoseweight,
+      italicangle=postscript.italicangle or 0,
+      units=fontheader.units or 0,
+      designsize=fontdata.designsize,
+      minsize=fontdata.minsize,
+      maxsize=fontdata.maxsize,
+      monospaced=(tonumber(postscript.monospaced or 0)>0) or metrics.panosewidth=="monospaced",
+      averagewidth=metrics.averagewidth,
+      xheight=metrics.xheight,
+      capheight=metrics.capheight,
+      ascender=metrics.typoascender,
+      descender=metrics.typodescender,
+      platformnames=platformnames and fontdata.platformnames or nil,
+    }
+    if metricstoo then
+      local keys={
+        "version",
+        "ascender","descender","linegap",
+        "maxadvancewidth","maxadvanceheight","maxextent",
+        "minbottomsidebearing","mintopsidebearing",
+      }
+      local h=fontdata.horizontalheader or {}
+      local v=fontdata.verticalheader  or {}
+      if h then
+        local th={}
+        local tv={}
+        for i=1,#keys do
+          local key=keys[i]
+          th[key]=h[key] or 0
+          tv[key]=v[key] or 0
+        end
+        info.horizontalmetrics=th
+        info.verticalmetrics=tv
+      end
+    end
+  elseif n then
+    info={
+      filename=fontdata.filename,
+      comment="there is no info for subfont "..n,
+    }
+  else
+    info={
+      filename=fontdata.filename,
+      comment="there is no info",
+    }
+  end
+  return info
+end
+local function loadtables(f,specification,offset)
+  if offset then
+    setposition(f,offset)
+  end
+  local tables={}
+  local basename=file.basename(specification.filename)
+  local filesize=specification.filesize
+  local filetime=specification.filetime
+  local fontdata={ 
+    filename=basename,
+    filesize=filesize,
+    filetime=filetime,
+    version=readstring(f,4),
+    noftables=readushort(f),
+    searchrange=readushort(f),
+    entryselector=readushort(f),
+    rangeshift=readushort(f),
+    tables=tables,
+  }
+  for i=1,fontdata.noftables do
+    local tag=lower(stripstring(readstring(f,4)))
+    local checksum=readulong(f) 
+    local offset=readulong(f)
+    local length=readulong(f)
+    if offset+length>filesize then
+      report("bad %a table in file %a",tag,basename)
+    end
+    tables[tag]={
+      checksum=checksum,
+      offset=offset,
+      length=length,
+    }
+  end
+  if tables.cff then
+    fontdata.format="opentype"
+  else
+    fontdata.format="truetype"
+  end
+  return fontdata
+end
+local function prepareglyps(fontdata)
+  local glyphs=setmetatableindex(function(t,k)
+    local v={
+      index=k,
+    }
+    t[k]=v
+    return v
+  end)
+  fontdata.glyphs=glyphs
+  fontdata.mapping={}
+end
+local function readdata(f,offset,specification)
+  local fontdata=loadtables(f,specification,offset)
+  if specification.glyphs then
+    prepareglyps(fontdata)
+  end
+  readers["name"](f,fontdata,specification)
+  local askedname=specification.askedname
+  if askedname then
+    local fullname=getname(fontdata,"fullname") or ""
+    local cleanname=gsub(askedname,"[^a-zA-Z0-9]","")
+    local foundname=gsub(fullname,"[^a-zA-Z0-9]","")
+    if lower(cleanname)~=lower(foundname) then
+      return 
+    end
+  end
+  readers["os/2"](f,fontdata,specification)
+  readers["head"](f,fontdata,specification)
+  readers["maxp"](f,fontdata,specification)
+  readers["hhea"](f,fontdata,specification)
+  readers["vhea"](f,fontdata,specification)
+  readers["hmtx"](f,fontdata,specification)
+  readers["vmtx"](f,fontdata,specification)
+  readers["vorg"](f,fontdata,specification)
+  readers["post"](f,fontdata,specification)
+  readers["cff" ](f,fontdata,specification)
+  readers["cmap"](f,fontdata,specification)
+  readers["loca"](f,fontdata,specification)
+  readers["glyf"](f,fontdata,specification)
+  readers["colr"](f,fontdata,specification)
+  readers["cpal"](f,fontdata,specification)
+  readers["svg" ](f,fontdata,specification)
+  readers["kern"](f,fontdata,specification)
+  readers["gdef"](f,fontdata,specification)
+  readers["gsub"](f,fontdata,specification)
+  readers["gpos"](f,fontdata,specification)
+  readers["math"](f,fontdata,specification)
+  fontdata.locations=nil
+  fontdata.tables=nil
+  fontdata.cidmaps=nil
+  fontdata.dictionaries=nil
+  return fontdata
+end
+local function loadfontdata(specification)
+  local filename=specification.filename
+  local fileattr=lfs.attributes(filename)
+  local filesize=fileattr and fileattr.size or 0
+  local filetime=fileattr and fileattr.modification or 0
+  local f=openfile(filename,true) 
+  if not f then
+    report("unable to open %a",filename)
+  elseif filesize==0 then
+    report("empty file %a",filename)
+    closefile(f)
+  else
+    specification.filesize=filesize
+    specification.filetime=filetime
+    local version=readstring(f,4)
+    local fontdata=nil
+    if version=="OTTO" or version=="true" or version=="\0\1\0\0" then
+      fontdata=readdata(f,0,specification)
+    elseif version=="ttcf" then
+      local subfont=tonumber(specification.subfont)
+      local offsets={}
+      local ttcversion=readulong(f)
+      local nofsubfonts=readulong(f)
+      for i=1,nofsubfonts do
+        offsets[i]=readulong(f)
+      end
+      if subfont then 
+        if subfont>=1 and subfont<=nofsubfonts then
+          fontdata=readdata(f,offsets[subfont],specification)
+        else
+          report("no subfont %a in file %a",subfont,filename)
+        end
+      else
+        subfont=specification.subfont
+        if type(subfont)=="string" and subfont~="" then
+          specification.askedname=subfont
+          for i=1,nofsubfonts do
+            fontdata=readdata(f,offsets[i],specification)
+            if fontdata then
+              fontdata.subfontindex=i
+              report("subfont named %a has index %a",subfont,i)
+              break
+            end
+          end
+          if not fontdata then
+            report("no subfont named %a",subfont)
+          end
+        else
+          local subfonts={}
+          fontdata={
+            filename=filename,
+            filesize=filesize,
+            filetime=filetime,
+            version=version,
+            subfonts=subfonts,
+            ttcversion=ttcversion,
+            nofsubfonts=nofsubfonts,
+          }
+          for i=1,nofsubfonts do
+            subfonts[i]=readdata(f,offsets[i],specification)
+          end
+        end
+      end
+    else
+      report("unknown version %a in file %a",version,filename)
+    end
+    closefile(f)
+    return fontdata or {}
+  end
+end
+local function loadfont(specification,n)
+  if type(specification)=="string" then
+    specification={
+      filename=specification,
+      info=true,
+      details=true,
+      glyphs=true,
+      shapes=true,
+      kerns=true,
+      globalkerns=true,
+      lookups=true,
+      subfont=n or true,
+      tounicode=false,
+    }
+  end
+  if specification.shapes or specification.lookups or specification.kerns then
+    specification.glyphs=true
+  end
+  if specification.glyphs then
+    specification.details=true
+  end
+  if specification.details then
+    specification.info=true 
+  end
+  if specification.platformnames then
+    specification.platformnames=true 
+  end
+  local function message(str)
+    report("fatal error in file %a: %s\n%s",specification.filename,str,debug.traceback())
+  end
+  local ok,result=xpcall(loadfontdata,message,specification)
+  if ok then
+    return result
+  end
+end
+function readers.loadshapes(filename,n)
+  local fontdata=loadfont {
+    filename=filename,
+    shapes=true,
+    subfont=n,
+  }
+  if fontdata then
+    for k,v in next,fontdata.glyphs do
+      v.class=nil
+      v.index=nil
+      v.math=nil
+    end
+  end
+  return fontdata and {
+    filename=filename,
+    format=fontdata.format,
+    glyphs=fontdata.glyphs,
+    units=fontdata.fontheader.units,
+  } or {
+    filename=filename,
+    format="unknown",
+    glyphs={},
+    units=0,
+  }
+end
+function readers.loadfont(filename,n)
+  local fontdata=loadfont {
+    filename=filename,
+    glyphs=true,
+    shapes=false,
+    lookups=true,
+    subfont=n,
+  }
+  if fontdata then
+    return {
+      tableversion=tableversion,
+      creator="context mkiv",
+      size=fontdata.filesize,
+      time=fontdata.filetime,
+      glyphs=fontdata.glyphs,
+      descriptions=fontdata.descriptions,
+      format=fontdata.format,
+      goodies={},
+      metadata=getinfo(fontdata,n,false,false,true),
+      properties={
+        hasitalics=fontdata.hasitalics or false,
+        maxcolorclass=fontdata.maxcolorclass,
+        hascolor=fontdata.hascolor or false,
+      },
+      resources={
+        filename=filename,
+        private=privateoffset,
+        duplicates=fontdata.duplicates or {},
+        features=fontdata.features  or {},
+        sublookups=fontdata.sublookups or {},
+        marks=fontdata.marks    or {},
+        markclasses=fontdata.markclasses or {},
+        marksets=fontdata.marksets  or {},
+        sequences=fontdata.sequences  or {},
+        variants=fontdata.variants,
+        version=getname(fontdata,"version"),
+        cidinfo=fontdata.cidinfo,
+        mathconstants=fontdata.mathconstants,
+        colorpalettes=fontdata.colorpalettes,
+        svgshapes=fontdata.svgshapes,
+      },
+    }
+  end
+end
+function readers.getinfo(filename,specification)
+  local subfont=nil
+  local platformnames=false
+  local rawfamilynames=false
+  if type(specification)=="table" then
+    subfont=tonumber(specification.subfont)
+    platformnames=specification.platformnames
+    rawfamilynames=specification.rawfamilynames
+  else
+    subfont=tonumber(specification)
+  end
+  local fontdata=loadfont {
+    filename=filename,
+    details=true,
+    platformnames=platformnames,
+  }
+  if fontdata then
+    local subfonts=fontdata.subfonts
+    if not subfonts then
+      return getinfo(fontdata,nil,platformnames,rawfamilynames)
+    elseif not subfont then
+      local info={}
+      for i=1,#subfonts do
+        info[i]=getinfo(fontdata,i,platformnames,rawfamilynames)
+      end
+      return info
+    elseif subfont>=1 and subfont<=#subfonts then
+      return getinfo(fontdata,subfont,platformnames,rawfamilynames)
+    else
+      return {
+        filename=filename,
+        comment="there is no subfont "..subfont.." in this file"
+      }
+    end
+  else
+    return {
+      filename=filename,
+      comment="the file cannot be opened for reading",
+    }
+  end
+end
+function readers.rehash(fontdata,hashmethod)
+  report("the %a helper is not yet implemented","rehash")
+end
+function readers.checkhash(fontdata)
+  report("the %a helper is not yet implemented","checkhash")
+end
+function readers.pack(fontdata,hashmethod)
+  report("the %a helper is not yet implemented","pack")
+end
+function readers.unpack(fontdata)
+  report("the %a helper is not yet implemented","unpack")
+end
+function readers.expand(fontdata)
+  report("the %a helper is not yet implemented","unpack")
+end
+function readers.compact(fontdata)
+  report("the %a helper is not yet implemented","compact")
+end
+local extenders={}
+function readers.registerextender(extender)
+  extenders[#extenders+1]=extender
+end
+function readers.extend(fontdata)
+  for i=1,#extenders do
+    local extender=extenders[i]
+    local name=extender.name or "unknown"
+    local action=extender.action
+    if action then
+      action(fontdata)
+    end
+  end
+end
+
+end --- [luaotfload, fontloader-2017-02-11.lua scope for “font-otr”] ---
+
+
+do  --- [luaotfload, fontloader-2017-02-11.lua scope for “font-cff” f3fc74e8629f7a2825c34a34550c790d] ---
+
+if not modules then modules={} end modules ['font-cff']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local next,type,tonumber=next,type,tonumber
+local byte=string.byte
+local concat,remove=table.concat,table.remove
+local floor,abs,round,ceil=math.floor,math.abs,math.round,math.ceil
+local P,C,R,S,C,Cs,Ct=lpeg.P,lpeg.C,lpeg.R,lpeg.S,lpeg.C,lpeg.Cs,lpeg.Ct
+local lpegmatch=lpeg.match
+local formatters=string.formatters
+local readers=fonts.handlers.otf.readers
+local streamreader=readers.streamreader
+local readbytes=streamreader.readbytes
+local readstring=streamreader.readstring
+local readbyte=streamreader.readcardinal1 
+local readushort=streamreader.readcardinal2 
+local readuint=streamreader.readcardinal3 
+local readulong=streamreader.readcardinal4 
+local setposition=streamreader.setposition
+local getposition=streamreader.getposition
+local setmetatableindex=table.setmetatableindex
+local trace_charstrings=false trackers.register("fonts.cff.charstrings",function(v) trace_charstrings=v end)
+local report=logs.reporter("otf reader","cff")
+local parsedictionaries
+local parsecharstring
+local parsecharstrings
+local resetcharstrings
+local parseprivates
+local defaultstrings={ [0]=
+  ".notdef","space","exclam","quotedbl","numbersign","dollar","percent",
+  "ampersand","quoteright","parenleft","parenright","asterisk","plus",
+  "comma","hyphen","period","slash","zero","one","two","three","four",
+  "five","six","seven","eight","nine","colon","semicolon","less",
+  "equal","greater","question","at","A","B","C","D","E","F","G","H",
+  "I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W",
+  "X","Y","Z","bracketleft","backslash","bracketright","asciicircum",
+  "underscore","quoteleft","a","b","c","d","e","f","g","h","i","j",
+  "k","l","m","n","o","p","q","r","s","t","u","v","w","x","y",
+  "z","braceleft","bar","braceright","asciitilde","exclamdown","cent",
+  "sterling","fraction","yen","florin","section","currency",
+  "quotesingle","quotedblleft","guillemotleft","guilsinglleft",
+  "guilsinglright","fi","fl","endash","dagger","daggerdbl",
+  "periodcentered","paragraph","bullet","quotesinglbase","quotedblbase",
+  "quotedblright","guillemotright","ellipsis","perthousand","questiondown",
+  "grave","acute","circumflex","tilde","macron","breve","dotaccent",
+  "dieresis","ring","cedilla","hungarumlaut","ogonek","caron","emdash",
+  "AE","ordfeminine","Lslash","Oslash","OE","ordmasculine","ae",
+  "dotlessi","lslash","oslash","oe","germandbls","onesuperior",
+  "logicalnot","mu","trademark","Eth","onehalf","plusminus","Thorn",
+  "onequarter","divide","brokenbar","degree","thorn","threequarters",
+  "twosuperior","registered","minus","eth","multiply","threesuperior",
+  "copyright","Aacute","Acircumflex","Adieresis","Agrave","Aring",
+  "Atilde","Ccedilla","Eacute","Ecircumflex","Edieresis","Egrave",
+  "Iacute","Icircumflex","Idieresis","Igrave","Ntilde","Oacute",
+  "Ocircumflex","Odieresis","Ograve","Otilde","Scaron","Uacute",
+  "Ucircumflex","Udieresis","Ugrave","Yacute","Ydieresis","Zcaron",
+  "aacute","acircumflex","adieresis","agrave","aring","atilde",
+  "ccedilla","eacute","ecircumflex","edieresis","egrave","iacute",
+  "icircumflex","idieresis","igrave","ntilde","oacute","ocircumflex",
+  "odieresis","ograve","otilde","scaron","uacute","ucircumflex",
+  "udieresis","ugrave","yacute","ydieresis","zcaron","exclamsmall",
+  "Hungarumlautsmall","dollaroldstyle","dollarsuperior","ampersandsmall",
+  "Acutesmall","parenleftsuperior","parenrightsuperior","twodotenleader",
+  "onedotenleader","zerooldstyle","oneoldstyle","twooldstyle",
+  "threeoldstyle","fouroldstyle","fiveoldstyle","sixoldstyle",
+  "sevenoldstyle","eightoldstyle","nineoldstyle","commasuperior",
+  "threequartersemdash","periodsuperior","questionsmall","asuperior",
+  "bsuperior","centsuperior","dsuperior","esuperior","isuperior",
+  "lsuperior","msuperior","nsuperior","osuperior","rsuperior","ssuperior",
+  "tsuperior","ff","ffi","ffl","parenleftinferior","parenrightinferior",
+  "Circumflexsmall","hyphensuperior","Gravesmall","Asmall","Bsmall",
+  "Csmall","Dsmall","Esmall","Fsmall","Gsmall","Hsmall","Ismall",
+  "Jsmall","Ksmall","Lsmall","Msmall","Nsmall","Osmall","Psmall",
+  "Qsmall","Rsmall","Ssmall","Tsmall","Usmall","Vsmall","Wsmall",
+  "Xsmall","Ysmall","Zsmall","colonmonetary","onefitted","rupiah",
+  "Tildesmall","exclamdownsmall","centoldstyle","Lslashsmall",
+  "Scaronsmall","Zcaronsmall","Dieresissmall","Brevesmall","Caronsmall",
+  "Dotaccentsmall","Macronsmall","figuredash","hypheninferior",
+  "Ogoneksmall","Ringsmall","Cedillasmall","questiondownsmall","oneeighth",
+  "threeeighths","fiveeighths","seveneighths","onethird","twothirds",
+  "zerosuperior","foursuperior","fivesuperior","sixsuperior",
+  "sevensuperior","eightsuperior","ninesuperior","zeroinferior",
+  "oneinferior","twoinferior","threeinferior","fourinferior",
+  "fiveinferior","sixinferior","seveninferior","eightinferior",
+  "nineinferior","centinferior","dollarinferior","periodinferior",
+  "commainferior","Agravesmall","Aacutesmall","Acircumflexsmall",
+  "Atildesmall","Adieresissmall","Aringsmall","AEsmall","Ccedillasmall",
+  "Egravesmall","Eacutesmall","Ecircumflexsmall","Edieresissmall",
+  "Igravesmall","Iacutesmall","Icircumflexsmall","Idieresissmall",
+  "Ethsmall","Ntildesmall","Ogravesmall","Oacutesmall","Ocircumflexsmall",
+  "Otildesmall","Odieresissmall","OEsmall","Oslashsmall","Ugravesmall",
+  "Uacutesmall","Ucircumflexsmall","Udieresissmall","Yacutesmall",
+  "Thornsmall","Ydieresissmall","001.000","001.001","001.002","001.003",
+  "Black","Bold","Book","Light","Medium","Regular","Roman","Semibold",
+}
+local cffreaders={
+  readbyte,
+  readushort,
+  readuint,
+  readulong,
+}
+local function readheader(f)
+  local offset=getposition(f)
+  local header={
+    offset=offset,
+    major=readbyte(f),
+    minor=readbyte(f),
+    size=readbyte(f),
+    osize=readbyte(f),
+  }
+  setposition(f,offset+header.size)
+  return header
+end
+local function readlengths(f)
+  local count=readushort(f)
+  if count==0 then
+    return {}
+  end
+  local osize=readbyte(f)
+  local read=cffreaders[osize]
+  if not read then
+    report("bad offset size: %i",osize)
+    return {}
+  end
+  local lengths={}
+  local previous=read(f)
+  for i=1,count do
+    local offset=read(f)
+    lengths[i]=offset-previous
+    previous=offset
+  end
+  return lengths
+end
+local function readfontnames(f)
+  local names=readlengths(f)
+  for i=1,#names do
+    names[i]=readstring(f,names[i])
+  end
+  return names
+end
+local function readtopdictionaries(f)
+  local dictionaries=readlengths(f)
+  for i=1,#dictionaries do
+    dictionaries[i]=readstring(f,dictionaries[i])
+  end
+  return dictionaries
+end
+local function readstrings(f)
+  local lengths=readlengths(f)
+  local strings=setmetatableindex({},defaultstrings)
+  local index=#defaultstrings
+  for i=1,#lengths do
+    index=index+1
+    strings[index]=readstring(f,lengths[i])
+  end
+  return strings
+end
+do
+  local stack={}
+  local top=0
+  local result={}
+  local strings={}
+  local p_single=P("\00")/function()
+      result.version=strings[stack[top]] or "unset"
+      top=0
+    end+P("\01")/function()
+      result.notice=strings[stack[top]] or "unset"
+      top=0
+    end+P("\02")/function()
+      result.fullname=strings[stack[top]] or "unset"
+      top=0
+    end+P("\03")/function()
+      result.familyname=strings[stack[top]] or "unset"
+      top=0
+    end+P("\04")/function()
+      result.weight=strings[stack[top]] or "unset"
+      top=0
+    end+P("\05")/function()
+      result.fontbbox={ unpack(stack,1,4) }
+      top=0
+    end
++P("\13")/function()
+      result.uniqueid=stack[top]
+      top=0
+    end+P("\14")/function()
+      result.xuid=concat(stack,"",1,top)
+      top=0
+    end+P("\15")/function()
+      result.charset=stack[top]
+      top=0
+    end+P("\16")/function()
+      result.encoding=stack[top]
+      top=0
+    end+P("\17")/function()
+      result.charstrings=stack[top]
+      top=0
+    end+P("\18")/function()
+      result.private={
+        size=stack[top-1],
+        offset=stack[top],
+      }
+      top=0
+    end+P("\19")/function()
+      result.subroutines=stack[top]
+    end+P("\20")/function()
+      result.defaultwidthx=stack[top]
+    end+P("\21")/function()
+      result.nominalwidthx=stack[top]
+    end
+  local p_double=P("\12")*(
+    P("\00")/function()
+      result.copyright=stack[top]
+      top=0
+    end+P("\01")/function()
+      result.monospaced=stack[top]==1 and true or false 
+      top=0
+    end+P("\02")/function()
+      result.italicangle=stack[top]
+      top=0
+    end+P("\03")/function()
+      result.underlineposition=stack[top]
+      top=0
+    end+P("\04")/function()
+      result.underlinethickness=stack[top]
+      top=0
+    end+P("\05")/function()
+      result.painttype=stack[top]
+      top=0
+    end+P("\06")/function()
+      result.charstringtype=stack[top]
+      top=0
+    end+P("\07")/function()
+      result.fontmatrix={ unpack(stack,1,6) }
+      top=0
+    end+P("\08")/function()
+      result.strokewidth=stack[top]
+      top=0
+    end+P("\20")/function()
+      result.syntheticbase=stack[top]
+      top=0
+    end+P("\21")/function()
+      result.postscript=strings[stack[top]] or "unset"
+      top=0
+    end+P("\22")/function()
+      result.basefontname=strings[stack[top]] or "unset"
+      top=0
+    end+P("\21")/function()
+      result.basefontblend=stack[top]
+      top=0
+    end+P("\30")/function()
+      result.cid.registry=strings[stack[top-2]] or "unset"
+      result.cid.ordering=strings[stack[top-1]] or "unset"
+      result.cid.supplement=stack[top]
+      top=0
+    end+P("\31")/function()
+      result.cid.fontversion=stack[top]
+      top=0
+    end+P("\32")/function()
+      result.cid.fontrevision=stack[top]
+      top=0
+    end+P("\33")/function()
+      result.cid.fonttype=stack[top]
+      top=0
+    end+P("\34")/function()
+      result.cid.count=stack[top]
+      top=0
+    end+P("\35")/function()
+      result.cid.uidbase=stack[top]
+      top=0
+    end+P("\36")/function()
+      result.cid.fdarray=stack[top]
+      top=0
+    end+P("\37")/function()
+      result.cid.fdselect=stack[top]
+      top=0
+    end+P("\38")/function()
+      result.cid.fontname=strings[stack[top]] or "unset"
+      top=0
+    end
+  )
+  local p_last=P("\x0F")/"0"+P("\x1F")/"1"+P("\x2F")/"2"+P("\x3F")/"3"+P("\x4F")/"4"+P("\x5F")/"5"+P("\x6F")/"6"+P("\x7F")/"7"+P("\x8F")/"8"+P("\x9F")/"9"+P("\xAF")/""+P("\xBF")/""+P("\xCF")/""+P("\xDF")/""+P("\xEF")/""+R("\xF0\xFF")/""
+  local remap={
+    ["\x00"]="00",["\x01"]="01",["\x02"]="02",["\x03"]="03",["\x04"]="04",["\x05"]="05",["\x06"]="06",["\x07"]="07",["\x08"]="08",["\x09"]="09",["\x0A"]="0.",["\x0B"]="0E",["\x0C"]="0E-",["\x0D"]="0",["\x0E"]="0-",["\x0F"]="0",
+    ["\x10"]="10",["\x11"]="11",["\x12"]="12",["\x13"]="13",["\x14"]="14",["\x15"]="15",["\x16"]="16",["\x17"]="17",["\x18"]="18",["\x19"]="19",["\x1A"]="0.",["\x1B"]="0E",["\x1C"]="0E-",["\x1D"]="0",["\x1E"]="0-",["\x1F"]="0",
+    ["\x20"]="20",["\x21"]="21",["\x22"]="22",["\x23"]="23",["\x24"]="24",["\x25"]="25",["\x26"]="26",["\x27"]="27",["\x28"]="28",["\x29"]="29",["\x2A"]="0.",["\x2B"]="0E",["\x2C"]="0E-",["\x2D"]="0",["\x2E"]="0-",["\x2F"]="0",
+    ["\x30"]="30",["\x31"]="31",["\x32"]="32",["\x33"]="33",["\x34"]="34",["\x35"]="35",["\x36"]="36",["\x37"]="37",["\x38"]="38",["\x39"]="39",["\x3A"]="0.",["\x3B"]="0E",["\x3C"]="0E-",["\x3D"]="0",["\x3E"]="0-",["\x3F"]="0",
+    ["\x40"]="40",["\x41"]="41",["\x42"]="42",["\x43"]="43",["\x44"]="44",["\x45"]="45",["\x46"]="46",["\x47"]="47",["\x48"]="48",["\x49"]="49",["\x4A"]="0.",["\x4B"]="0E",["\x4C"]="0E-",["\x4D"]="0",["\x4E"]="0-",["\x4F"]="0",
+    ["\x50"]="50",["\x51"]="51",["\x52"]="52",["\x53"]="53",["\x54"]="54",["\x55"]="55",["\x56"]="56",["\x57"]="57",["\x58"]="58",["\x59"]="59",["\x5A"]="0.",["\x5B"]="0E",["\x5C"]="0E-",["\x5D"]="0",["\x5E"]="0-",["\x5F"]="0",
+    ["\x60"]="60",["\x61"]="61",["\x62"]="62",["\x63"]="63",["\x64"]="64",["\x65"]="65",["\x66"]="66",["\x67"]="67",["\x68"]="68",["\x69"]="69",["\x6A"]="0.",["\x6B"]="0E",["\x6C"]="0E-",["\x6D"]="0",["\x6E"]="0-",["\x6F"]="0",
+    ["\x70"]="70",["\x71"]="71",["\x72"]="72",["\x73"]="73",["\x74"]="74",["\x75"]="75",["\x76"]="76",["\x77"]="77",["\x78"]="78",["\x79"]="79",["\x7A"]="0.",["\x7B"]="0E",["\x7C"]="0E-",["\x7D"]="0",["\x7E"]="0-",["\x7F"]="0",
+    ["\x80"]="80",["\x81"]="81",["\x82"]="82",["\x83"]="83",["\x84"]="84",["\x85"]="85",["\x86"]="86",["\x87"]="87",["\x88"]="88",["\x89"]="89",["\x8A"]="0.",["\x8B"]="0E",["\x8C"]="0E-",["\x8D"]="0",["\x8E"]="0-",["\x8F"]="0",
+    ["\x90"]="90",["\x91"]="91",["\x92"]="92",["\x93"]="93",["\x94"]="94",["\x95"]="95",["\x96"]="96",["\x97"]="97",["\x98"]="98",["\x99"]="99",["\x9A"]="0.",["\x9B"]="0E",["\x9C"]="0E-",["\x9D"]="0",["\x9E"]="0-",["\x9F"]="0",
+    ["\xA0"]=".0",["\xA1"]=".1",["\xA2"]=".2",["\xA3"]=".3",["\xA4"]=".4",["\xA5"]=".5",["\xA6"]=".6",["\xA7"]=".7",["\xA8"]=".8",["\xA9"]=".9",["\xAA"]="..",["\xAB"]=".E",["\xAC"]=".E-",["\xAD"]=".",["\xAE"]=".-",["\xAF"]=".",
+    ["\xB0"]="E0",["\xB1"]="E1",["\xB2"]="E2",["\xB3"]="E3",["\xB4"]="E4",["\xB5"]="E5",["\xB6"]="E6",["\xB7"]="E7",["\xB8"]="E8",["\xB9"]="E9",["\xBA"]="E.",["\xBB"]="EE",["\xBC"]="EE-",["\xBD"]="E",["\xBE"]="E-",["\xBF"]="E",
+    ["\xC0"]="E-0",["\xC1"]="E-1",["\xC2"]="E-2",["\xC3"]="E-3",["\xC4"]="E-4",["\xC5"]="E-5",["\xC6"]="E-6",["\xC7"]="E-7",["\xC8"]="E-8",["\xC9"]="E-9",["\xCA"]="E-.",["\xCB"]="E-E",["\xCC"]="E-E-",["\xCD"]="E-",["\xCE"]="E--",["\xCF"]="E-",
+    ["\xD0"]="-0",["\xD1"]="-1",["\xD2"]="-2",["\xD3"]="-3",["\xD4"]="-4",["\xD5"]="-5",["\xD6"]="-6",["\xD7"]="-7",["\xD8"]="-8",["\xD9"]="-9",["\xDA"]="-.",["\xDB"]="-E",["\xDC"]="-E-",["\xDD"]="-",["\xDE"]="--",["\xDF"]="-",
+  }
+  local p_nibbles=P("\30")*Cs(((1-p_last)/remap)^0+p_last)/function(n)
+    top=top+1
+    stack[top]=tonumber(n) or 0
+  end
+  local p_byte=C(R("\32\246"))/function(b0)
+    top=top+1
+    stack[top]=byte(b0)-139
+  end
+  local p_positive=C(R("\247\250"))*C(1)/function(b0,b1)
+    top=top+1
+    stack[top]=(byte(b0)-247)*256+byte(b1)+108
+  end
+  local p_negative=C(R("\251\254"))*C(1)/function(b0,b1)
+    top=top+1
+    stack[top]=-(byte(b0)-251)*256-byte(b1)-108
+  end
+  local p_short=P("\28")*C(1)*C(1)/function(b1,b2)
+    top=top+1
+    local n=0x100*byte(b1)+byte(b2)
+    if n>=0x8000 then
+      stack[top]=n-0xFFFF-1
+    else
+      stack[top]=n
+    end
+  end
+  local p_long=P("\29")*C(1)*C(1)*C(1)*C(1)/function(b1,b2,b3,b4)
+    top=top+1
+    local n=0x1000000*byte(b1)+0x10000*byte(b2)+0x100*byte(b3)+byte(b4)
+    if n>=0x8000000 then
+      stack[top]=n-0xFFFFFFFF-1
+    else
+      stack[top]=n
+    end
+  end
+  local p_unsupported=P(1)/function(detail)
+    top=0
+  end
+  local p_dictionary=(
+    p_byte+p_positive+p_negative+p_short+p_long+p_nibbles+p_single+p_double+p_unsupported
+  )^1
+  parsedictionaries=function(data,dictionaries)
+    stack={}
+    strings=data.strings
+    for i=1,#dictionaries do
+      top=0
+      result={
+        monospaced=false,
+        italicangle=0,
+        underlineposition=-100,
+        underlinethickness=50,
+        painttype=0,
+        charstringtype=2,
+        fontmatrix={ 0.001,0,0,0.001,0,0 },
+        fontbbox={ 0,0,0,0 },
+        strokewidth=0,
+        charset=0,
+        encoding=0,
+        cid={
+          fontversion=0,
+          fontrevision=0,
+          fonttype=0,
+          count=8720,
+        }
+      }
+      lpegmatch(p_dictionary,dictionaries[i])
+      dictionaries[i]=result
+    end
+    result={}
+    top=0
+    stack={}
+  end
+  parseprivates=function(data,dictionaries)
+    stack={}
+    strings=data.strings
+    for i=1,#dictionaries do
+      local private=dictionaries[i].private
+      if private and private.data then
+        top=0
+        result={
+          forcebold=false,
+          languagegroup=0,
+          expansionfactor=0.06,
+          initialrandomseed=0,
+          subroutines=0,
+          defaultwidthx=0,
+          nominalwidthx=0,
+          cid={
+          },
+        }
+        lpegmatch(p_dictionary,private.data)
+        private.data=result
+      end
+    end
+    result={}
+    top=0
+    stack={}
+  end
+  local x=0
+  local y=0
+  local width=false
+  local r=0
+  local stems=0
+  local globalbias=0
+  local localbias=0
+  local globals=false
+  local locals=false
+  local depth=1
+  local xmin=0
+  local xmax=0
+  local ymin=0
+  local ymax=0
+  local checked=false
+  local keepcurve=false
+  local version=2
+  local function showstate(where)
+    report("%w%-10s : [%s] n=%i",depth*2,where,concat(stack," ",1,top),top)
+  end
+  local function showvalue(where,value,showstack)
+    if showstack then
+      report("%w%-10s : %s : [%s] n=%i",depth*2,where,tostring(value),concat(stack," ",1,top),top)
+    else
+      report("%w%-10s : %s",depth*2,where,tostring(value))
+    end
+  end
+  local function moveto(x,y)
+    if keepcurve then
+      r=r+1
+      result[r]={ x,y,"m" }
+    end
+    if checked then
+      if x<xmin then xmin=x elseif x>xmax then xmax=x end
+      if y<ymin then ymin=y elseif y>ymax then ymax=y end
+    else
+      xmin=x
+      ymin=y
+      xmax=x
+      ymax=y
+      checked=true
+    end
+  end
+  local function lineto(x,y)
+    if keepcurve then
+      r=r+1
+      result[r]={ x,y,"l" }
+    end
+    if checked then
+      if x<xmin then xmin=x elseif x>xmax then xmax=x end
+      if y<ymin then ymin=y elseif y>ymax then ymax=y end
+    else
+      xmin=x
+      ymin=y
+      xmax=x
+      ymax=y
+      checked=true
+    end
+  end
+  local function curveto(x1,y1,x2,y2,x3,y3)
+    if keepcurve then
+      r=r+1
+      result[r]={ x1,y1,x2,y2,x3,y3,"c" }
+    end
+    if checked then
+      if x1<xmin then xmin=x1 elseif x1>xmax then xmax=x1 end
+      if y1<ymin then ymin=y1 elseif y1>ymax then ymax=y1 end
+    else
+      xmin=x1
+      ymin=y1
+      xmax=x1
+      ymax=y1
+      checked=true
+    end
+    if x2<xmin then xmin=x2 elseif x2>xmax then xmax=x2 end
+    if y2<ymin then ymin=y2 elseif y2>ymax then ymax=y2 end
+    if x3<xmin then xmin=x3 elseif x3>xmax then xmax=x3 end
+    if y3<ymin then ymin=y3 elseif y3>ymax then ymax=y3 end
+  end
+  local function rmoveto()
+    if top>2 then
+      if not width then
+        width=stack[1]
+        if trace_charstrings then
+          showvalue("width",width)
+        end
+      end
+    elseif not width then
+      width=true
+    end
+    if trace_charstrings then
+      showstate("rmoveto")
+    end
+    x=x+stack[top-1] 
+    y=y+stack[top]  
+    top=0
+    moveto(x,y)
+  end
+  local function hmoveto()
+    if top>1 then
+      if not width then
+        width=stack[1]
+        if trace_charstrings then
+          showvalue("width",width)
+        end
+      end
+    elseif not width then
+      width=true
+    end
+    if trace_charstrings then
+      showstate("hmoveto")
+    end
+    x=x+stack[top] 
+    top=0
+    moveto(x,y)
+  end
+  local function vmoveto()
+    if top>1 then
+      if not width then
+        width=stack[1]
+        if trace_charstrings then
+          showvalue("width",width)
+        end
+      end
+    elseif not width then
+      width=true
+    end
+    if trace_charstrings then
+      showstate("vmoveto")
+    end
+    y=y+stack[top] 
+    top=0
+    moveto(x,y)
+  end
+  local function rlineto()
+    if trace_charstrings then
+      showstate("rlineto")
+    end
+    for i=1,top,2 do
+      x=x+stack[i]  
+      y=y+stack[i+1] 
+      lineto(x,y)
+    end
+    top=0
+  end
+  local function xlineto(swap) 
+    for i=1,top do
+      if swap then
+        x=x+stack[i]
+        swap=false
+      else
+        y=y+stack[i]
+        swap=true
+      end
+      lineto(x,y)
+    end
+    top=0
+  end
+  local function hlineto() 
+    if trace_charstrings then
+      showstate("hlineto")
+    end
+    xlineto(true)
+  end
+  local function vlineto() 
+    if trace_charstrings then
+      showstate("vlineto")
+    end
+    xlineto(false)
+  end
+  local function rrcurveto()
+    if trace_charstrings then
+      showstate("rrcurveto")
+    end
+    for i=1,top,6 do
+      local ax=x+stack[i]  
+      local ay=y+stack[i+1] 
+      local bx=ax+stack[i+2] 
+      local by=ay+stack[i+3] 
+      x=bx+stack[i+4] 
+      y=by+stack[i+5] 
+      curveto(ax,ay,bx,by,x,y)
+    end
+    top=0
+  end
+  local function hhcurveto()
+    if trace_charstrings then
+      showstate("hhcurveto")
+    end
+    local s=1
+    if top%2~=0 then
+      y=y+stack[1] 
+      s=2
+    end
+    for i=s,top,4 do
+      local ax=x+stack[i] 
+      local ay=y
+      local bx=ax+stack[i+1] 
+      local by=ay+stack[i+2] 
+      x=bx+stack[i+3] 
+      y=by
+      curveto(ax,ay,bx,by,x,y)
+    end
+    top=0
+  end
+  local function vvcurveto()
+    if trace_charstrings then
+      showstate("vvcurveto")
+    end
+    local s=1
+    local d=0
+    if top%2~=0 then
+      d=stack[1] 
+      s=2
+    end
+    for i=s,top,4 do
+      local ax=x+d
+      local ay=y+stack[i] 
+      local bx=ax+stack[i+1] 
+      local by=ay+stack[i+2] 
+      x=bx
+      y=by+stack[i+3] 
+      curveto(ax,ay,bx,by,x,y)
+      d=0
+    end
+    top=0
+  end
+  local function xxcurveto(swap)
+    local last=top%4~=0 and stack[top]
+    if last then
+      top=top-1
+    end
+    local sw=swap
+    for i=1,top,4 do
+      local ax,ay,bx,by
+      if swap then
+        ax=x+stack[i]
+        ay=y
+        bx=ax+stack[i+1]
+        by=ay+stack[i+2]
+        y=by+stack[i+3]
+        if last and i+3==top then
+          x=bx+last
+        else
+          x=bx
+        end
+        swap=false
+      else
+        ax=x
+        ay=y+stack[i]
+        bx=ax+stack[i+1]
+        by=ay+stack[i+2]
+        x=bx+stack[i+3]
+        if last and i+3==top then
+          y=by+last
+        else
+          y=by
+        end
+        swap=true
+      end
+      curveto(ax,ay,bx,by,x,y)
+    end
+    top=0
+  end
+  local function hvcurveto()
+    if trace_charstrings then
+      showstate("hvcurveto")
+    end
+    xxcurveto(true)
+  end
+  local function vhcurveto()
+    if trace_charstrings then
+      showstate("vhcurveto")
+    end
+    xxcurveto(false)
+  end
+  local function rcurveline()
+    if trace_charstrings then
+      showstate("rcurveline")
+    end
+    for i=1,top-2,6 do
+      local ax=x+stack[i]  
+      local ay=y+stack[i+1] 
+      local bx=ax+stack[i+2] 
+      local by=ay+stack[i+3] 
+      x=bx+stack[i+4] 
+      y=by+stack[i+5] 
+      curveto(ax,ay,bx,by,x,y)
+    end
+    x=x+stack[top-1] 
+    y=y+stack[top]  
+    lineto(x,y)
+    top=0
+  end
+  local function rlinecurve()
+    if trace_charstrings then
+      showstate("rlinecurve")
+    end
+    if top>6 then
+      for i=1,top-6,2 do
+        x=x+stack[i]
+        y=y+stack[i+1]
+        lineto(x,y)
+      end
+    end
+    local ax=x+stack[top-5]
+    local ay=y+stack[top-4]
+    local bx=ax+stack[top-3]
+    local by=ay+stack[top-2]
+    x=bx+stack[top-1]
+    y=by+stack[top]
+    curveto(ax,ay,bx,by,x,y)
+    top=0
+  end
+  local function flex() 
+    if trace_charstrings then
+      showstate("flex")
+    end
+    local ax=x+stack[1] 
+    local ay=y+stack[2] 
+    local bx=ax+stack[3] 
+    local by=ay+stack[4] 
+    local cx=bx+stack[5] 
+    local cy=by+stack[6] 
+    curveto(ax,ay,bx,by,cx,cy)
+    local dx=cx+stack[7] 
+    local dy=cy+stack[8] 
+    local ex=dx+stack[9] 
+    local ey=dy+stack[10] 
+    x=ex+stack[11]    
+    y=ey+stack[12]    
+    curveto(dx,dy,ex,ey,x,y)
+    top=0
+  end
+  local function hflex()
+    if trace_charstrings then
+      showstate("hflex")
+    end
+    local ax=x+stack[1]  
+    local ay=y
+    local bx=ax+stack[2] 
+    local by=ay+stack[3] 
+    local cx=bx+stack[4] 
+    local cy=by
+    curveto(ax,ay,bx,by,cx,cy)
+    local dx=cx+stack[5] 
+    local dy=by
+    local ex=dx+stack[6] 
+    local ey=y
+    x=ex+stack[7]    
+    curveto(dx,dy,ex,ey,x,y)
+    top=0
+  end
+  local function hflex1()
+    if trace_charstrings then
+      showstate("hflex1")
+    end
+    local ax=x+stack[1] 
+    local ay=y+stack[2] 
+    local bx=ax+stack[3] 
+    local by=ay+stack[4] 
+    local cx=bx+stack[5] 
+    local cy=by
+    curveto(ax,ay,bx,by,cx,cy)
+    local dx=cx+stack[6] 
+    local dy=by
+    local ex=dx+stack[7] 
+    local ey=dy+stack[8] 
+    x=ex+stack[9]    
+    curveto(dx,dy,ex,ey,x,y)
+    top=0
+  end
+  local function flex1()
+    if trace_charstrings then
+      showstate("flex1")
+    end
+    local ax=x+stack[1] 
+    local ay=y+stack[2] 
+    local bx=ax+stack[3] 
+    local by=ay+stack[4] 
+    local cx=bx+stack[5] 
+    local cy=by+stack[6] 
+    curveto(ax,ay,bx,by,cx,cy)
+    local dx=cx+stack[7] 
+    local dy=cy+stack[8] 
+    local ex=dx+stack[9] 
+    local ey=dy+stack[10] 
+    if abs(ex-x)>abs(ey-y) then 
+      x=ex+stack[11]
+    else
+      y=ey+stack[11]
+    end
+    curveto(dx,dy,ex,ey,x,y)
+    top=0
+  end
+  local function getstem()
+    if top==0 then
+    elseif top%2~=0 then
+      if width then
+        remove(stack,1)
+      else
+        width=remove(stack,1)
+        if trace_charstrings then
+          showvalue("width",width)
+        end
+      end
+      top=top-1
+    end
+    if trace_charstrings then
+      showstate("stem")
+    end
+    stems=stems+top/2
+    top=0
+  end
+  local function getmask()
+    if top==0 then
+    elseif top%2~=0 then
+      if width then
+        remove(stack,1)
+      else
+        width=remove(stack,1)
+        if trace_charstrings then
+          showvalue("width",width)
+        end
+      end
+      top=top-1
+    end
+    if trace_charstrings then
+      showstate(operator==19 and "hintmark" or "cntrmask")
+    end
+    stems=stems+top/2
+    top=0
+    if stems==0 then
+    elseif stems<=8 then
+      return 1
+    else
+      return floor((stems+7)/8)
+    end
+  end
+  local function unsupported(t)
+    if trace_charstrings then
+      showstate("unsupported "..t)
+    end
+    top=0
+  end
+  local function unsupportedsub(t)
+    if trace_charstrings then
+      showstate("unsupported sub "..t)
+    end
+    top=0
+  end
+  local function getstem3()
+    if trace_charstrings then
+      showstate("stem3")
+    end
+    top=0
+  end
+  local function divide()
+    if version==1 then
+      local d=stack[top]
+      top=top-1
+      stack[top]=stack[top]/d
+    end
+  end
+  local function closepath()
+    if version==1 then
+      if trace_charstrings then
+        showstate("closepath")
+      end
+    end
+    top=0
+  end
+  local function hsbw()
+    if version==1 then
+      if trace_charstrings then
+        showstate("dotsection")
+      end
+      width=stack[top]
+    end
+    top=0
+  end
+  local function seac()
+    if version==1 then
+      if trace_charstrings then
+        showstate("seac")
+      end
+    end
+    top=0
+  end
+  local function sbw()
+    if version==1 then
+      if trace_charstrings then
+        showstate("sbw")
+      end
+      width=stack[top-1]
+    end
+    top=0
+  end
+  local function callothersubr()
+    if version==1 then
+      if trace_charstrings then
+        showstate("callothersubr (unsupported)")
+      end
+    end
+    top=0
+  end
+  local function pop()
+    if version==1 then
+      if trace_charstrings then
+        showstate("pop (unsupported)")
+      end
+      top=top+1
+      stack[top]=0 
+    else
+      top=0
+    end
+  end
+  local function setcurrentpoint()
+    if version==1 then
+      if trace_charstrings then
+        showstate("pop (unsupported)")
+      end
+      x=x+stack[top-1]
+      y=y+stack[top]
+    end
+    top=0
+  end
+  local actions={ [0]=unsupported,
+    getstem,
+    unsupported,
+    getstem,
+    vmoveto,
+    rlineto,
+    hlineto,
+    vlineto,
+    rrcurveto,
+    unsupported,
+    unsupported,
+    unsupported,
+    unsupported,
+    hsbw,
+    unsupported,
+    unsupported,
+    unsupported,
+    unsupported,
+    getstem,
+    getmask,
+    getmask,
+    rmoveto,
+    hmoveto,
+    getstem,
+    rcurveline,
+    rlinecurve,
+    vvcurveto,
+    hhcurveto,
+    unsupported,
+    unsupported,
+    vhcurveto,
+    hvcurveto,
+  }
+  local subactions={
+    [000]=dotsection,
+    [001]=getstem3,
+    [002]=getstem3,
+    [006]=seac,
+    [007]=sbw,
+    [012]=divide,
+    [016]=callothersubr,
+    [017]=pop,
+    [033]=setcurrentpoint,
+    [034]=hflex,
+    [035]=flex,
+    [036]=hflex1,
+    [037]=flex1,
+  }
+  local p_bytes=Ct((P(1)/byte)^0)
+  local function call(scope,list,bias,process)
+    depth=depth+1
+    if top==0 then
+      showstate(formatters["unknown %s call"](scope))
+      top=0
+    else
+      local index=stack[top]+bias
+      top=top-1
+      if trace_charstrings then
+        showvalue(scope,index,true)
+      end
+      local tab=list[index]
+      if tab then
+        if type(tab)=="string" then
+          tab=lpegmatch(p_bytes,tab)
+          list[index]=tab
+        end
+        process(tab)
+      else
+        showstate(formatters["unknown %s call %i"](scope,index))
+        top=0
+      end
+    end
+    depth=depth-1
+  end
+  local function process(tab)
+    local i=1
+    local n=#tab
+    while i<=n do
+      local t=tab[i]
+      if t>=32 and t<=246 then
+        top=top+1
+        stack[top]=t-139
+        i=i+1
+      elseif t>=247 and t<=250 then
+        top=top+1
+        stack[top]=(t-247)*256+tab[i+1]+108
+        i=i+2
+      elseif t>=251 and t<=254 then
+        top=top+1
+        stack[top]=-(t-251)*256-tab[i+1]-108
+        i=i+2
+      elseif t==28 then
+        top=top+1
+        local n=0x100*tab[i+1]+tab[i+2]
+        if n>=0x8000 then
+          stack[top]=n-0xFFFF-1
+        else
+          stack[top]=n
+        end
+        i=i+3
+      elseif t==255 then
+        local n=0x100*tab[i+1]+tab[i+2]
+        top=top+1
+        if n>=0x8000 then
+          stack[top]=n-0xFFFF-1+(0x100*tab[i+3]+tab[i+4])/0xFFFF
+        else
+          stack[top]=n+(0x100*tab[i+3]+tab[i+4])/0xFFFF
+        end
+        i=i+5
+      elseif t==11 then
+        if trace_charstrings then
+          showstate("return")
+        end
+        return
+      elseif t==10 then
+        call("local",locals,localbias,process)
+        i=i+1
+       elseif t==14 then 
+        if width then
+        elseif top>0 then
+          width=stack[1]
+          if trace_charstrings then
+            showvalue("width",width)
+          end
+        else
+          width=true
+        end
+        if trace_charstrings then
+          showstate("endchar")
+        end
+        return
+      elseif t==29 then
+        call("global",globals,globalbias,process)
+        i=i+1
+      elseif t==12 then
+        i=i+1
+        local t=tab[i]
+        local a=subactions[t]
+        if a then
+          a(t)
+        else
+          if trace_charstrings then
+            showvalue("<subaction>",t)
+          end
+          top=0
+        end
+        i=i+1
+      else
+        local a=actions[t]
+        if a then
+          local s=a(t)
+          if s then
+            i=i+s
+          end
+        else
+          if trace_charstrings then
+            showvalue("<action>",t)
+          end
+          top=0
+        end
+        i=i+1
+      end
+    end
+  end
+  local function setbias(globals,locals)
+    if version==1 then
+      return
+        false,
+        false
+    else
+      local g,l=#globals,#locals
+      return
+        ((g<1240 and 107) or (g<33900 and 1131) or 32768)+1,
+        ((l<1240 and 107) or (l<33900 and 1131) or 32768)+1
+    end
+  end
+  parsecharstrings=function(data,glyphs,doshapes,tversion)
+    local dictionary=data.dictionaries[1]
+    local charstrings=dictionary.charstrings
+    local charset=dictionary.charset
+    local private=dictionary.private or { data={} }
+    keepcurve=doshapes
+    version=tversion
+    stack={}
+    glyphs=glyphs or {}
+    strings=data.strings
+    globals=data.routines or {}
+    locals=dictionary.subroutines or {}
+    globalbias,localbias=setbias(globals,locals)
+    local nominalwidth=private.data.nominalwidthx or 0
+    local defaultwidth=private.data.defaultwidthx or 0
+    for i=1,#charstrings do
+      local tab=charstrings[i]
+      if type(tab)=="string" then
+        tab=lpegmatch(p_bytes,tab)
+      end
+      local index=i-1
+      x=0
+      y=0
+      width=false
+      r=0
+      top=0
+      stems=0
+      result={}
+      xmin=0
+      xmax=0
+      ymin=0
+      ymax=0
+      checked=false
+      if trace_charstrings then
+        report("glyph: %i",index)
+        report("data: % t",tab)
+      end
+      process(tab)
+      local boundingbox={ round(xmin),round(ymin),round(xmax),round(ymax) }
+      if width==true or width==false then
+        width=defaultwidth
+      else
+        width=nominalwidth+width
+      end
+      local glyph=glyphs[index] 
+      if not glyph then
+        glyphs[index]={
+          segments=doshapes~=false and result or nil,
+          boundingbox=boundingbox,
+          width=width,
+          name=charset[index],
+        }
+      else
+        glyph.segments=doshapes~=false and result or nil
+        glyph.boundingbox=boundingbox
+        if not glyph.width then
+          glyph.width=width
+        end
+        if charset and not glyph.name then
+          glyph.name=charset[index]
+        end
+      end
+      if trace_charstrings then
+        report("width: %s",tostring(width))
+        report("boundingbox: % t",boundingbox)
+      end
+      charstrings[i]=nil 
+    end
+    return glyphs
+  end
+  parsecharstring=function(data,dictionary,tab,glyphs,index,doshapes,tversion)
+    local private=dictionary.private
+    keepcurve=doshapes
+    version=tversion
+    strings=data.strings 
+    locals=dictionary.subroutines or {}
+    globals=data.routines or {}
+    globalbias,localbias=setbias(globals,locals)
+    local nominalwidth=private and private.data.nominalwidthx or 0
+    local defaultwidth=private and private.data.defaultwidthx or 0
+    if type(tab)=="string" then
+      tab=lpegmatch(p_bytes,tab)
+    end
+    x=0
+    y=0
+    width=false
+    r=0
+    top=0
+    stems=0
+    result={}
+    xmin=0
+    xmax=0
+    ymin=0
+    ymax=0
+    checked=false
+    if trace_charstrings then
+      report("glyph: %i",index)
+      report("data: % t",tab)
+    end
+    process(tab)
+    local boundingbox={ xmin,ymin,xmax,ymax }
+    if width==true or width==false then
+      width=defaultwidth
+    else
+      width=nominalwidth+width
+    end
+    index=index-1
+    local glyph=glyphs[index] 
+    if not glyph then
+      glyphs[index]={
+        segments=doshapes~=false and result or nil,
+        boundingbox=boundingbox,
+        width=width,
+        name=charset[index],
+      }
+    else
+      glyph.segments=doshapes~=false and result or nil
+      glyph.boundingbox=boundingbox
+      if not glyph.width then
+        glyph.width=width
+      end
+      if charset and not glyph.name then
+        glyph.name=charset[index]
+      end
+    end
+    if trace_charstrings then
+      report("width: %s",tostring(width))
+      report("boundingbox: % t",boundingbox)
+    end
+  end
+  resetcharstrings=function()
+    result={}
+    top=0
+    stack={}
+  end
+end
+local function readglobals(f,data)
+  local routines=readlengths(f)
+  for i=1,#routines do
+    routines[i]=readstring(f,routines[i])
+  end
+  data.routines=routines
+end
+local function readencodings(f,data)
+  data.encodings={}
+end
+local function readcharsets(f,data,dictionary)
+  local header=data.header
+  local strings=data.strings
+  local nofglyphs=data.nofglyphs
+  local charsetoffset=dictionary.charset
+  if charsetoffset~=0 then
+    setposition(f,header.offset+charsetoffset)
+    local format=readbyte(f)
+    local charset={ [0]=".notdef" }
+    dictionary.charset=charset
+    if format==0 then
+      for i=1,nofglyphs do
+        charset[i]=strings[readushort(f)]
+      end
+    elseif format==1 or format==2 then
+      local readcount=format==1 and readbyte or readushort
+      local i=1
+      while i<=nofglyphs do
+        local sid=readushort(f)
+        local n=readcount(f)
+        for s=sid,sid+n do
+          charset[i]=strings[s]
+          i=i+1
+          if i>nofglyphs then
+            break
+          end
+        end
+      end
+    else
+      report("cff parser: unsupported charset format %a",format)
+    end
+  end
+end
+local function readprivates(f,data)
+  local header=data.header
+  local dictionaries=data.dictionaries
+  local private=dictionaries[1].private
+  if private then
+    setposition(f,header.offset+private.offset)
+    private.data=readstring(f,private.size)
+  end
+end
+local function readlocals(f,data,dictionary)
+  local header=data.header
+  local private=dictionary.private
+  if private then
+    local subroutineoffset=private.data.subroutines
+    if subroutineoffset~=0 then
+      setposition(f,header.offset+private.offset+subroutineoffset)
+      local subroutines=readlengths(f)
+      for i=1,#subroutines do
+        subroutines[i]=readstring(f,subroutines[i])
+      end
+      dictionary.subroutines=subroutines
+      private.data.subroutines=nil
+    else
+      dictionary.subroutines={}
+    end
+  else
+    dictionary.subroutines={}
+  end
+end
+local function readcharstrings(f,data)
+  local header=data.header
+  local dictionaries=data.dictionaries
+  local dictionary=dictionaries[1]
+  local type=dictionary.charstringtype
+  local offset=dictionary.charstrings
+  if type==2 then
+    setposition(f,header.offset+offset)
+    local charstrings=readlengths(f)
+    local nofglyphs=#charstrings
+    for i=1,nofglyphs do
+      charstrings[i]=readstring(f,charstrings[i])
+    end
+    data.nofglyphs=nofglyphs
+    dictionary.charstrings=charstrings
+  else
+    report("unsupported charstr type %i",type)
+    data.nofglyphs=0
+    dictionary.charstrings={}
+  end
+end
+local function readcidprivates(f,data)
+  local header=data.header
+  local dictionaries=data.dictionaries[1].cid.dictionaries
+  for i=1,#dictionaries do
+    local dictionary=dictionaries[i]
+    local private=dictionary.private
+    if private then
+      setposition(f,header.offset+private.offset)
+      private.data=readstring(f,private.size)
+    end
+  end
+  parseprivates(data,dictionaries)
+end
+local function readnoselect(f,data,glyphs,doshapes,version)
+  local dictionaries=data.dictionaries
+  local dictionary=dictionaries[1]
+  readglobals(f,data)
+  readcharstrings(f,data)
+  readencodings(f,data)
+  readcharsets(f,data,dictionary)
+  readprivates(f,data)
+  parseprivates(data,data.dictionaries)
+  readlocals(f,data,dictionary)
+  parsecharstrings(data,glyphs,doshapes,version)
+  resetcharstrings()
+end
+readers.parsecharstrings=parsecharstrings
+local function readfdselect(f,data,glyphs,doshapes,version)
+  local header=data.header
+  local dictionaries=data.dictionaries
+  local dictionary=dictionaries[1]
+  local cid=dictionary.cid
+  local cidselect=cid and cid.fdselect
+  readglobals(f,data)
+  readcharstrings(f,data)
+  readencodings(f,data)
+  local charstrings=dictionary.charstrings
+  local fdindex={}
+  local nofglyphs=data.nofglyphs
+  local maxindex=-1
+  setposition(f,header.offset+cidselect)
+  local format=readbyte(f)
+  if format==1 then
+    for i=0,nofglyphs do 
+      local index=readbyte(i)
+      fdindex[i]=index
+      if index>maxindex then
+        maxindex=index
+      end
+    end
+  elseif format==3 then
+    local nofranges=readushort(f)
+    local first=readushort(f)
+    local index=readbyte(f)
+    while true do
+      local last=readushort(f)
+      if index>maxindex then
+        maxindex=index
+      end
+      for i=first,last do
+        fdindex[i]=index
+      end
+      if last>=nofglyphs then
+        break
+      else
+        first=last+1
+        index=readbyte(f)
+      end
+    end
+  else
+  end
+  if maxindex>=0 then
+    local cidarray=cid.fdarray
+    setposition(f,header.offset+cidarray)
+    local dictionaries=readlengths(f)
+    for i=1,#dictionaries do
+      dictionaries[i]=readstring(f,dictionaries[i])
+    end
+    parsedictionaries(data,dictionaries)
+    cid.dictionaries=dictionaries
+    readcidprivates(f,data)
+    for i=1,#dictionaries do
+      readlocals(f,data,dictionaries[i])
+    end
+    for i=1,#charstrings do
+      parsecharstring(data,dictionaries[fdindex[i]+1],charstrings[i],glyphs,i,doshapes,version)
+    end
+    resetcharstrings()
+  end
+end
+function readers.cff(f,fontdata,specification)
+  if specification.details then
+    local datatable=fontdata.tables.cff
+    if datatable then
+      local offset=datatable.offset
+      local glyphs=fontdata.glyphs
+      if not f then
+        report("invalid filehandle")
+        return
+      end
+      if offset then
+        setposition(f,offset)
+      end
+      local header=readheader(f)
+      if header.major>1 then
+        report("version mismatch")
+        return
+      end
+      local names=readfontnames(f)
+      local dictionaries=readtopdictionaries(f)
+      local strings=readstrings(f)
+      local data={
+        header=header,
+        names=names,
+        dictionaries=dictionaries,
+        strings=strings,
+        nofglyphs=fontdata.nofglyphs,
+      }
+      parsedictionaries(data,data.dictionaries)
+      local d=dictionaries[1]
+      local c=d.cid
+      fontdata.cffinfo={
+        familynamename=d.familyname,
+        fullname=d.fullname,
+        boundingbox=d.boundingbox,
+        weight=d.weight,
+        italicangle=d.italicangle,
+        underlineposition=d.underlineposition,
+        underlinethickness=d.underlinethickness,
+        monospaced=d.monospaced,
+      }
+      fontdata.cidinfo=c and {
+        registry=c.registry,
+        ordering=c.ordering,
+        supplement=c.supplement,
+      }
+      if not specification.glyphs then
+      else
+        local cid=d.cid
+        if cid and cid.fdselect then
+          readfdselect(f,data,glyphs,specification.shapes or false)
+        else
+          readnoselect(f,data,glyphs,specification.shapes or false)
+        end
+      end
+    end
+  end
+end
+
+end --- [luaotfload, fontloader-2017-02-11.lua scope for “font-cff”] ---
+
+
+do  --- [luaotfload, fontloader-2017-02-11.lua scope for “font-ttf” e0893de6d0f3f421ee4386fa90429db8] ---
+
+if not modules then modules={} end modules ['font-ttf']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local next,type,unpack=next,type,unpack
+local bittest=bit32.btest
+local sqrt=math.sqrt
+local report=logs.reporter("otf reader","ttf")
+local readers=fonts.handlers.otf.readers
+local streamreader=readers.streamreader
+local setposition=streamreader.setposition
+local getposition=streamreader.getposition
+local skipbytes=streamreader.skip
+local readbyte=streamreader.readcardinal1 
+local readushort=streamreader.readcardinal2 
+local readulong=streamreader.readcardinal4 
+local readchar=streamreader.readinteger1  
+local readshort=streamreader.readinteger2  
+local read2dot14=streamreader.read2dot14   
+local function mergecomposites(glyphs,shapes)
+  local function merge(index,shape,components)
+    local contours={}
+    local nofcontours=0
+    for i=1,#components do
+      local component=components[i]
+      local subindex=component.index
+      local subshape=shapes[subindex]
+      local subcontours=subshape.contours
+      if not subcontours then
+        local subcomponents=subshape.components
+        if subcomponents then
+          subcontours=merge(subindex,subshape,subcomponents)
+        end
+      end
+      if subcontours then
+        local matrix=component.matrix
+        local xscale=matrix[1]
+        local xrotate=matrix[2]
+        local yrotate=matrix[3]
+        local yscale=matrix[4]
+        local xoffset=matrix[5]
+        local yoffset=matrix[6]
+        for i=1,#subcontours do
+          local points=subcontours[i]
+          local result={}
+          for i=1,#points do
+            local p=points[i]
+            local x=p[1]
+            local y=p[2]
+            result[i]={
+              xscale*x+xrotate*y+xoffset,
+              yscale*y+yrotate*x+yoffset,
+              p[3]
+            }
+          end
+          nofcontours=nofcontours+1
+          contours[nofcontours]=result
+        end
+      else
+        report("missing contours composite %s, component %s of %s, glyph %s",index,i,#components,subindex)
+      end
+    end
+    shape.contours=contours
+    shape.components=nil
+    return contours
+  end
+  for index=1,#glyphs do
+    local shape=shapes[index]
+    local components=shape.components
+    if components then
+      merge(index,shape,components)
+    end
+  end
+end
+local function readnothing(f,nofcontours)
+  return {
+    type="nothing",
+  }
+end
+local function curveto(m_x,m_y,l_x,l_y,r_x,r_y) 
+  return {
+    l_x+2/3*(m_x-l_x),l_y+2/3*(m_y-l_y),
+    r_x+2/3*(m_x-r_x),r_y+2/3*(m_y-r_y),
+    r_x,r_y,"c" 
+  }
+end
+local function contours2outlines(glyphs,shapes)
+  local quadratic=true
+  for index=1,#glyphs do
+    local glyph=glyphs[index]
+    local shape=shapes[index]
+    local contours=shape.contours
+    if contours then
+      local nofcontours=#contours
+      local segments={}
+      local nofsegments=0
+      glyph.segments=segments
+      if nofcontours>0 then
+        for i=1,nofcontours do
+          local contour=contours[i]
+          local nofcontour=#contour
+          if nofcontour>0 then
+            local first_pt=contour[1]
+            local first_on=first_pt[3]
+            if nofcontour==1 then
+              first_pt[3]="m" 
+              nofsegments=nofsegments+1
+              segments[nofsegments]=first_pt
+            else 
+              local first_on=first_pt[3]
+              local last_pt=contour[nofcontour]
+              local last_on=last_pt[3]
+              local start=1
+              local control_pt=false
+              if first_on then
+                start=2
+              else
+                if last_on then
+                  first_pt=last_pt
+                else
+                  first_pt={ (first_pt[1]+last_pt[1])/2,(first_pt[2]+last_pt[2])/2,false }
+                end
+                control_pt=first_pt
+              end
+              nofsegments=nofsegments+1
+              segments[nofsegments]={ first_pt[1],first_pt[2],"m" } 
+              local previous_pt=first_pt
+              for i=start,nofcontour do
+                local current_pt=contour[i]
+                local current_on=current_pt[3]
+                local previous_on=previous_pt[3]
+                if previous_on then
+                  if current_on then
+                    nofsegments=nofsegments+1
+                    segments[nofsegments]={ current_pt[1],current_pt[2],"l" } 
+                  else
+                    control_pt=current_pt
+                  end
+                elseif current_on then
+                  local ps=segments[nofsegments]
+                  nofsegments=nofsegments+1
+                  if quadratic then
+                    segments[nofsegments]={ control_pt[1],control_pt[2],current_pt[1],current_pt[2],"q" } 
+                  else
+                    local p=segments[nofsegments-1] local n=#p
+                    segments[nofsegments]=curveto(control_pt[1],control_pt[2],p[n-2],p[n-1],current_pt[1],current_pt[2])
+                  end
+                  control_pt=false
+                else
+                  nofsegments=nofsegments+1
+                  local halfway_x=(previous_pt[1]+current_pt[1])/2
+                  local halfway_y=(previous_pt[2]+current_pt[2])/2
+                  if quadratic then
+                    segments[nofsegments]={ control_pt[1],control_pt[2],halfway_x,halfway_y,"q" } 
+                  else
+                    local p=segments[nofsegments-1] local n=#p
+                    segments[nofsegments]=curveto(control_pt[1],control_pt[2],p[n-2],p[n-1],halfway_x,halfway_y)
+                  end
+                  control_pt=current_pt
+                end
+                previous_pt=current_pt
+              end
+              if first_pt==last_pt then
+              else
+                nofsegments=nofsegments+1
+                if not control_pt then
+                  segments[nofsegments]={ first_pt[1],first_pt[2],"l" } 
+                elseif quadratic then
+                  segments[nofsegments]={ control_pt[1],control_pt[2],first_pt[1],first_pt[2],"q" } 
+                else
+                  local p=last_pt local n=#p
+                  segments[nofsegments]=curveto(control_pt[1],control_pt[2],p[n-2],p[n-1],first_pt[1],first_pt[2])
+                end
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+end
+local function readglyph(f,nofcontours)
+  local points={}
+  local endpoints={}
+  local instructions={}
+  local flags={}
+  for i=1,nofcontours do
+    endpoints[i]=readshort(f)+1
+  end
+  local nofpoints=endpoints[nofcontours]
+  local nofinstructions=readushort(f)
+  skipbytes(f,nofinstructions)
+  local i=1
+  while i<=nofpoints do
+    local flag=readbyte(f)
+    flags[i]=flag
+    if bittest(flag,0x0008) then
+      for j=1,readbyte(f) do
+        i=i+1
+        flags[i]=flag
+      end
+    end
+    i=i+1
+  end
+  local x=0
+  for i=1,nofpoints do
+    local flag=flags[i]
+    local short=bittest(flag,0x0002)
+    local same=bittest(flag,0x0010)
+    if short then
+      if same then
+        x=x+readbyte(f)
+      else
+        x=x-readbyte(f)
+      end
+    elseif same then
+    else
+      x=x+readshort(f)
+    end
+    points[i]={ x,y,bittest(flag,0x0001) }
+  end
+  local y=0
+  for i=1,nofpoints do
+    local flag=flags[i]
+    local short=bittest(flag,0x0004)
+    local same=bittest(flag,0x0020)
+    if short then
+      if same then
+        y=y+readbyte(f)
+      else
+        y=y-readbyte(f)
+      end
+    elseif same then
+    else
+      y=y+readshort(f)
+    end
+    points[i][2]=y
+  end
+  local first=1
+  for i=1,#endpoints do
+    local last=endpoints[i]
+    endpoints[i]={ unpack(points,first,last) }
+    first=last+1
+  end
+  return {
+    type="glyph",
+    contours=endpoints,
+  }
+end
+local function readcomposite(f)
+  local components={}
+  local nofcomponents=0
+  local instructions=false
+  while true do
+    local flags=readushort(f)
+    local index=readushort(f)
+    local f_xyarg=bittest(flags,0x0002)
+    local f_offset=bittest(flags,0x0800)
+    local xscale=1
+    local xrotate=0
+    local yrotate=0
+    local yscale=1
+    local xoffset=0
+    local yoffset=0
+    local base=false
+    local reference=false
+    if f_xyarg then
+      if bittest(flags,0x0001) then 
+        xoffset=readshort(f)
+        yoffset=readshort(f)
+      else
+        xoffset=readchar(f) 
+        yoffset=readchar(f) 
+      end
+    else
+      if bittest(flags,0x0001) then 
+        base=readshort(f)
+        reference=readshort(f)
+      else
+        base=readchar(f) 
+        reference=readchar(f) 
+      end
+    end
+    if bittest(flags,0x0008) then 
+      xscale=read2dot14(f)
+      yscale=xscale
+      if f_xyarg and f_offset then
+        xoffset=xoffset*xscale
+        yoffset=yoffset*yscale
+      end
+    elseif bittest(flags,0x0040) then 
+      xscale=read2dot14(f)
+      yscale=read2dot14(f)
+      if f_xyarg and f_offset then
+        xoffset=xoffset*xscale
+        yoffset=yoffset*yscale
+      end
+    elseif bittest(flags,0x0080) then 
+      xscale=read2dot14(f)
+      xrotate=read2dot14(f)
+      yrotate=read2dot14(f)
+      yscale=read2dot14(f)
+      if f_xyarg and f_offset then
+        xoffset=xoffset*sqrt(xscale^2+xrotate^2)
+        yoffset=yoffset*sqrt(yrotate^2+yscale^2)
+      end
+    end
+    nofcomponents=nofcomponents+1
+    components[nofcomponents]={
+      index=index,
+      usemine=bittest(flags,0x0200),
+      round=bittest(flags,0x0006),
+      base=base,
+      reference=reference,
+      matrix={ xscale,xrotate,yrotate,yscale,xoffset,yoffset },
+    }
+    if bittest(flags,0x0100) then
+      instructions=true
+    end
+    if not bittest(flags,0x0020) then 
+      break
+    end
+  end
+  return {
+    type="composite",
+    components=components,
+  }
+end
+function readers.loca(f,fontdata,specification)
+  if specification.glyphs then
+    local datatable=fontdata.tables.loca
+    if datatable then
+      local offset=fontdata.tables.glyf.offset
+      local format=fontdata.fontheader.indextolocformat
+      local locations={}
+      setposition(f,datatable.offset)
+      if format==1 then
+        local nofglyphs=datatable.length/4-1
+      -1
+        for i=0,nofglyphs do
+          locations[i]=offset+readulong(f)
+        end
+        fontdata.nofglyphs=nofglyphs
+      else
+        local nofglyphs=datatable.length/2-1
+      -1
+        for i=0,nofglyphs do
+          locations[i]=offset+readushort(f)*2
+        end
+        fontdata.nofglyphs=nofglyphs
+      end
+      fontdata.locations=locations
+    end
+  end
+end
+function readers.glyf(f,fontdata,specification) 
+  if specification.glyphs then
+    local datatable=fontdata.tables.glyf
+    if datatable then
+      local locations=fontdata.locations
+      if locations then
+        local glyphs=fontdata.glyphs
+        local nofglyphs=fontdata.nofglyphs
+        local filesize=fontdata.filesize
+        local nothing={ 0,0,0,0 }
+        local shapes={}
+        local loadshapes=specification.shapes
+        for index=0,nofglyphs do
+          local location=locations[index]
+          if location>=filesize then
+            report("discarding %s glyphs due to glyph location bug",nofglyphs-index+1)
+            fontdata.nofglyphs=index-1
+            fontdata.badfont=true
+            break
+          elseif location>0 then
+            setposition(f,location)
+            local nofcontours=readshort(f)
+            glyphs[index].boundingbox={
+              readshort(f),
+              readshort(f),
+              readshort(f),
+              readshort(f),
+            }
+            if not loadshapes then
+            elseif nofcontours==0 then
+              shapes[index]=readnothing(f,nofcontours)
+            elseif nofcontours>0 then
+              shapes[index]=readglyph(f,nofcontours)
+            else
+              shapes[index]=readcomposite(f,nofcontours)
+            end
+          else
+            if loadshapes then
+              shapes[index]={}
+            end
+            glyphs[index].boundingbox=nothing
+          end
+        end
+        if loadshapes then
+          mergecomposites(glyphs,shapes)
+          contours2outlines(glyphs,shapes)
+        end
+      end
+    end
+  end
+end
+
+end --- [luaotfload, fontloader-2017-02-11.lua scope for “font-ttf”] ---
+
+
+do  --- [luaotfload, fontloader-2017-02-11.lua scope for “font-dsp” 4a5266ada979d5c2d48867dc3ffaefea] ---
+
+if not modules then modules={} end modules ['font-dsp']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local next,type=next,type
+local bittest=bit32.btest
+local rshift=bit32.rshift
+local concat=table.concat
+local lower=string.lower
+local copy=table.copy
+local sub=string.sub
+local strip=string.strip
+local tohash=table.tohash
+local reversed=table.reversed
+local setmetatableindex=table.setmetatableindex
+local formatters=string.formatters
+local sortedkeys=table.sortedkeys
+local sortedhash=table.sortedhash
+local report=logs.reporter("otf reader")
+local readers=fonts.handlers.otf.readers
+local streamreader=readers.streamreader
+local setposition=streamreader.setposition
+local getposition=streamreader.getposition
+local skipshort=streamreader.skipshort
+local readushort=streamreader.readcardinal2 
+local readulong=streamreader.readcardinal4 
+local readshort=streamreader.readinteger2  
+local readfword=readshort
+local readstring=streamreader.readstring
+local readtag=streamreader.readtag
+local readbytes=streamreader.readbytes
+local gsubhandlers={}
+local gposhandlers={}
+local lookupidoffset=-1  
+local classes={
+  "base",
+  "ligature",
+  "mark",
+  "component",
+}
+local gsubtypes={
+  "single",
+  "multiple",
+  "alternate",
+  "ligature",
+  "context",
+  "chainedcontext",
+  "extension",
+  "reversechainedcontextsingle",
+}
+local gpostypes={
+  "single",
+  "pair",
+  "cursive",
+  "marktobase",
+  "marktoligature",
+  "marktomark",
+  "context",
+  "chainedcontext",
+  "extension",
+}
+local chaindirections={
+  context=0,
+  chainedcontext=1,
+  reversechainedcontextsingle=-1,
+}
+local lookupnames={
+  gsub={
+    single="gsub_single",
+    multiple="gsub_multiple",
+    alternate="gsub_alternate",
+    ligature="gsub_ligature",
+    context="gsub_context",
+    chainedcontext="gsub_contextchain",
+    reversechainedcontextsingle="gsub_reversecontextchain",
+  },
+  gpos={
+    single="gpos_single",
+    pair="gpos_pair",
+    cursive="gpos_cursive",
+    marktobase="gpos_mark2base",
+    marktoligature="gpos_mark2ligature",
+    marktomark="gpos_mark2mark",
+    context="gpos_context",
+    chainedcontext="gpos_contextchain",
+  }
+}
+local lookupflags=setmetatableindex(function(t,k)
+  local v={
+    bittest(k,0x0008) and true or false,
+    bittest(k,0x0004) and true or false,
+    bittest(k,0x0002) and true or false,
+    bittest(k,0x0001) and true or false,
+  }
+  t[k]=v
+  return v
+end)
+local function readcoverage(f,offset,simple)
+  setposition(f,offset)
+  local coverageformat=readushort(f)
+  local coverage={}
+  if coverageformat==1 then
+    local nofcoverage=readushort(f)
+    if simple then
+      for i=1,nofcoverage do
+        coverage[i]=readushort(f)
+      end
+    else
+      for i=0,nofcoverage-1 do
+        coverage[readushort(f)]=i 
+      end
+    end
+  elseif coverageformat==2 then
+    local nofranges=readushort(f)
+    local n=simple and 1 or 0 
+    for i=1,nofranges do
+      local firstindex=readushort(f)
+      local lastindex=readushort(f)
+      local coverindex=readushort(f)
+      if simple then
+        for i=firstindex,lastindex do
+          coverage[n]=i
+          n=n+1
+        end
+      else
+        for i=firstindex,lastindex do
+          coverage[i]=n
+          n=n+1
+        end
+      end
+    end
+  else
+    report("unknown coverage format %a ",coverageformat)
+  end
+  return coverage
+end
+local function readclassdef(f,offset,preset)
+  setposition(f,offset)
+  local classdefformat=readushort(f)
+  local classdef={}
+  if type(preset)=="number" then
+    for k=0,preset-1 do
+      classdef[k]=1
+    end
+  end
+  if classdefformat==1 then
+    local index=readushort(f)
+    local nofclassdef=readushort(f)
+    for i=1,nofclassdef do
+      classdef[index]=readushort(f)+1
+      index=index+1
+    end
+  elseif classdefformat==2 then
+    local nofranges=readushort(f)
+    local n=0
+    for i=1,nofranges do
+      local firstindex=readushort(f)
+      local lastindex=readushort(f)
+      local class=readushort(f)+1
+      for i=firstindex,lastindex do
+        classdef[i]=class
+      end
+    end
+  else
+    report("unknown classdef format %a ",classdefformat)
+  end
+  if type(preset)=="table" then
+    for k in next,preset do
+      if not classdef[k] then
+        classdef[k]=1
+      end
+    end
+  end
+  return classdef
+end
+local function classtocoverage(defs)
+  if defs then
+    local list={}
+    for index,class in next,defs do
+      local c=list[class]
+      if c then
+        c[#c+1]=index
+      else
+        list[class]={ index }
+      end
+    end
+    return list
+  end
+end
+local function readposition(f,format)
+  if format==0 then
+    return nil
+  end
+  local x=bittest(format,0x0001) and readshort(f) or 0 
+  local y=bittest(format,0x0002) and readshort(f) or 0 
+  local h=bittest(format,0x0004) and readshort(f) or 0 
+  local v=bittest(format,0x0008) and readshort(f) or 0 
+  if x==0 and y==0 and h==0 and v==0 then
+    return nil
+  else
+    return { x,y,h,v }
+  end
+end
+local function readanchor(f,offset)
+  if not offset or offset==0 then
+    return nil 
+  end
+  setposition(f,offset)
+  local format=readshort(f)
+  if format==0 then
+    report("invalid anchor format %i @ position %i",format,offset)
+    return false
+  elseif format>3 then
+    report("unsupported anchor format %i @ position %i",format,offset)
+    return false
+  end
+  return { readshort(f),readshort(f) }
+end
+local function readfirst(f,offset)
+  if offset then
+    setposition(f,offset)
+  end
+  return { readushort(f) }
+end
+local function readarray(f,offset,first)
+  if offset then
+    setposition(f,offset)
+  end
+  local n=readushort(f)
+  if first then
+    local t={ first }
+    for i=2,n do
+      t[i]=readushort(f)
+    end
+    return t,n
+  elseif n>0 then
+    local t={}
+    for i=1,n do
+      t[i]=readushort(f)
+    end
+    return t,n
+  end
+end
+local function readcoveragearray(f,offset,t,simple)
+  if not t then
+    return nil
+  end
+  local n=#t
+  if n==0 then
+    return nil
+  end
+  for i=1,n do
+    t[i]=readcoverage(f,offset+t[i],simple)
+  end
+  return t
+end
+local function covered(subset,all)
+  local used,u
+  for i=1,#subset do
+    local s=subset[i]
+    if all[s] then
+      if used then
+        u=u+1
+        used[u]=s
+      else
+        u=1
+        used={ s }
+      end
+    end
+  end
+  return used
+end
+local function readlookuparray(f,noflookups,nofcurrent)
+  local lookups={}
+  if noflookups>0 then
+    local length=0
+    for i=1,noflookups do
+      local index=readushort(f)+1
+      if index>length then
+        length=index
+      end
+      lookups[index]=readushort(f)+1
+    end
+    for index=1,length do
+      if not lookups[index] then
+        lookups[index]=false
+      end
+    end
+  end
+  return lookups
+end
+local function unchainedcontext(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,what)
+  local tableoffset=lookupoffset+offset
+  setposition(f,tableoffset)
+  local subtype=readushort(f)
+  if subtype==1 then
+    local coverage=readushort(f)
+    local subclasssets=readarray(f)
+    local rules={}
+    if subclasssets then
+      coverage=readcoverage(f,tableoffset+coverage,true)
+      for i=1,#subclasssets do
+        local offset=subclasssets[i]
+        if offset>0 then
+          local firstcoverage=coverage[i]
+          local rulesoffset=tableoffset+offset
+          local subclassrules=readarray(f,rulesoffset)
+          for rule=1,#subclassrules do
+            setposition(f,rulesoffset+subclassrules[rule])
+            local nofcurrent=readushort(f)
+            local noflookups=readushort(f)
+            local current={ { firstcoverage } }
+            for i=2,nofcurrent do
+              current[i]={ readushort(f) }
+            end
+            local lookups=readlookuparray(f,noflookups,nofcurrent)
+            rules[#rules+1]={
+              current=current,
+              lookups=lookups
+            }
+          end
+        end
+      end
+    else
+      report("empty subclassset in %a subtype %i","unchainedcontext",subtype)
+    end
+    return {
+      format="glyphs",
+      rules=rules,
+    }
+  elseif subtype==2 then
+    local coverage=readushort(f)
+    local currentclassdef=readushort(f)
+    local subclasssets=readarray(f)
+    local rules={}
+    if subclasssets then
+      coverage=readcoverage(f,tableoffset+coverage)
+      currentclassdef=readclassdef(f,tableoffset+currentclassdef,coverage)
+      local currentclasses=classtocoverage(currentclassdef,fontdata.glyphs)
+      for class=1,#subclasssets do
+        local offset=subclasssets[class]
+        if offset>0 then
+          local firstcoverage=currentclasses[class]
+          if firstcoverage then
+            firstcoverage=covered(firstcoverage,coverage) 
+            if firstcoverage then
+              local rulesoffset=tableoffset+offset
+              local subclassrules=readarray(f,rulesoffset)
+              for rule=1,#subclassrules do
+                setposition(f,rulesoffset+subclassrules[rule])
+                local nofcurrent=readushort(f)
+                local noflookups=readushort(f)
+                local current={ firstcoverage }
+                for i=2,nofcurrent do
+                  current[i]=currentclasses[readushort(f)+1]
+                end
+                local lookups=readlookuparray(f,noflookups,nofcurrent)
+                rules[#rules+1]={
+                  current=current,
+                  lookups=lookups
+                }
+              end
+            else
+              report("no coverage")
+            end
+          else
+            report("no coverage class")
+          end
+        end
+      end
+    else
+      report("empty subclassset in %a subtype %i","unchainedcontext",subtype)
+    end
+    return {
+      format="class",
+      rules=rules,
+    }
+  elseif subtype==3 then
+    local current=readarray(f)
+    local noflookups=readushort(f)
+    local lookups=readlookuparray(f,noflookups,#current)
+    current=readcoveragearray(f,tableoffset,current,true)
+    return {
+      format="coverage",
+      rules={
+        {
+          current=current,
+          lookups=lookups,
+        }
+      }
+    }
+  else
+    report("unsupported subtype %a in %a %s",subtype,"unchainedcontext",what)
+  end
+end
+local function chainedcontext(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,what)
+  local tableoffset=lookupoffset+offset
+  setposition(f,tableoffset)
+  local subtype=readushort(f)
+  if subtype==1 then
+    local coverage=readushort(f)
+    local subclasssets=readarray(f)
+    local rules={}
+    if subclasssets then
+      coverage=readcoverage(f,tableoffset+coverage,true)
+      for i=1,#subclasssets do
+        local offset=subclasssets[i]
+        if offset>0 then
+          local firstcoverage=coverage[i]
+          local rulesoffset=tableoffset+offset
+          local subclassrules=readarray(f,rulesoffset)
+          for rule=1,#subclassrules do
+            setposition(f,rulesoffset+subclassrules[rule])
+            local nofbefore=readushort(f)
+            local before
+            if nofbefore>0 then
+              before={}
+              for i=1,nofbefore do
+                before[i]={ readushort(f) }
+              end
+            end
+            local nofcurrent=readushort(f)
+            local current={ { firstcoverage } }
+            for i=2,nofcurrent do
+              current[i]={ readushort(f) }
+            end
+            local nofafter=readushort(f)
+            local after
+            if nofafter>0 then
+              after={}
+              for i=1,nofafter do
+                after[i]={ readushort(f) }
+              end
+            end
+            local noflookups=readushort(f)
+            local lookups=readlookuparray(f,noflookups,nofcurrent)
+            rules[#rules+1]={
+              before=before,
+              current=current,
+              after=after,
+              lookups=lookups,
+            }
+          end
+        end
+      end
+    else
+      report("empty subclassset in %a subtype %i","chainedcontext",subtype)
+    end
+    return {
+      format="glyphs",
+      rules=rules,
+    }
+  elseif subtype==2 then
+    local coverage=readushort(f)
+    local beforeclassdef=readushort(f)
+    local currentclassdef=readushort(f)
+    local afterclassdef=readushort(f)
+    local subclasssets=readarray(f)
+    local rules={}
+    if subclasssets then
+      local coverage=readcoverage(f,tableoffset+coverage)
+      local beforeclassdef=readclassdef(f,tableoffset+beforeclassdef,nofglyphs)
+      local currentclassdef=readclassdef(f,tableoffset+currentclassdef,coverage)
+      local afterclassdef=readclassdef(f,tableoffset+afterclassdef,nofglyphs)
+      local beforeclasses=classtocoverage(beforeclassdef,fontdata.glyphs)
+      local currentclasses=classtocoverage(currentclassdef,fontdata.glyphs)
+      local afterclasses=classtocoverage(afterclassdef,fontdata.glyphs)
+      for class=1,#subclasssets do
+        local offset=subclasssets[class]
+        if offset>0 then
+          local firstcoverage=currentclasses[class]
+          if firstcoverage then
+            firstcoverage=covered(firstcoverage,coverage) 
+            if firstcoverage then
+              local rulesoffset=tableoffset+offset
+              local subclassrules=readarray(f,rulesoffset)
+              for rule=1,#subclassrules do
+                setposition(f,rulesoffset+subclassrules[rule])
+                local nofbefore=readushort(f)
+                local before
+                if nofbefore>0 then
+                  before={}
+                  for i=1,nofbefore do
+                    before[i]=beforeclasses[readushort(f)+1]
+                  end
+                end
+                local nofcurrent=readushort(f)
+                local current={ firstcoverage }
+                for i=2,nofcurrent do
+                  current[i]=currentclasses[readushort(f)+1]
+                end
+                local nofafter=readushort(f)
+                local after
+                if nofafter>0 then
+                  after={}
+                  for i=1,nofafter do
+                    after[i]=afterclasses[readushort(f)+1]
+                  end
+                end
+                local noflookups=readushort(f)
+                local lookups=readlookuparray(f,noflookups,nofcurrent)
+                rules[#rules+1]={
+                  before=before,
+                  current=current,
+                  after=after,
+                  lookups=lookups,
+                }
+              end
+            else
+              report("no coverage")
+            end
+          else
+            report("class is not covered")
+          end
+        end
+      end
+    else
+      report("empty subclassset in %a subtype %i","chainedcontext",subtype)
+    end
+    return {
+      format="class",
+      rules=rules,
+    }
+  elseif subtype==3 then
+    local before=readarray(f)
+    local current=readarray(f)
+    local after=readarray(f)
+    local noflookups=readushort(f)
+    local lookups=readlookuparray(f,noflookups,#current)
+    before=readcoveragearray(f,tableoffset,before,true)
+    current=readcoveragearray(f,tableoffset,current,true)
+    after=readcoveragearray(f,tableoffset,after,true)
+    return {
+      format="coverage",
+      rules={
+        {
+          before=before,
+          current=current,
+          after=after,
+          lookups=lookups,
+        }
+      }
+    }
+  else
+    report("unsupported subtype %a in %a %s",subtype,"chainedcontext",what)
+  end
+end
+local function extension(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,types,handlers,what)
+  local tableoffset=lookupoffset+offset
+  setposition(f,tableoffset)
+  local subtype=readushort(f)
+  if subtype==1 then
+    local lookuptype=types[readushort(f)]
+    local faroffset=readulong(f)
+    local handler=handlers[lookuptype]
+    if handler then
+      return handler(f,fontdata,lookupid,tableoffset+faroffset,0,glyphs,nofglyphs),lookuptype
+    else
+      report("no handler for lookuptype %a subtype %a in %s %s",lookuptype,subtype,what,"extension")
+    end
+  else
+    report("unsupported subtype %a in %s %s",subtype,what,"extension")
+  end
+end
+function gsubhandlers.single(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  local tableoffset=lookupoffset+offset
+  setposition(f,tableoffset)
+  local subtype=readushort(f)
+  if subtype==1 then
+    local coverage=readushort(f)
+    local delta=readshort(f) 
+    local coverage=readcoverage(f,tableoffset+coverage) 
+    for index in next,coverage do
+      local newindex=index+delta
+      if index>nofglyphs or newindex>nofglyphs then
+        report("invalid index in %s format %i: %i -> %i (max %i)","single",subtype,index,newindex,nofglyphs)
+        coverage[index]=nil
+      else
+        coverage[index]=newindex
+      end
+    end
+    return {
+      coverage=coverage
+    }
+  elseif subtype==2 then 
+    local coverage=readushort(f)
+    local nofreplacements=readushort(f)
+    local replacements={}
+    for i=1,nofreplacements do
+      replacements[i]=readushort(f)
+    end
+    local coverage=readcoverage(f,tableoffset+coverage) 
+    for index,newindex in next,coverage do
+      newindex=newindex+1
+      if index>nofglyphs or newindex>nofglyphs then
+        report("invalid index in %s format %i: %i -> %i (max %i)","single",subtype,index,newindex,nofglyphs)
+        coverage[index]=nil
+      else
+        coverage[index]=replacements[newindex]
+      end
+    end
+    return {
+      coverage=coverage
+    }
+  else
+    report("unsupported subtype %a in %a substitution",subtype,"single")
+  end
+end
+local function sethandler(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,what)
+  local tableoffset=lookupoffset+offset
+  setposition(f,tableoffset)
+  local subtype=readushort(f)
+  if subtype==1 then
+    local coverage=readushort(f)
+    local nofsequence=readushort(f)
+    local sequences={}
+    for i=1,nofsequence do
+      sequences[i]=readushort(f)
+    end
+    for i=1,nofsequence do
+      setposition(f,tableoffset+sequences[i])
+      local n=readushort(f)
+      local s={}
+      for i=1,n do
+        s[i]=readushort(f)
+      end
+      sequences[i]=s
+    end
+    local coverage=readcoverage(f,tableoffset+coverage)
+    for index,newindex in next,coverage do
+      newindex=newindex+1
+      if index>nofglyphs or newindex>nofglyphs then
+        report("invalid index in %s format %i: %i -> %i (max %i)",what,subtype,index,newindex,nofglyphs)
+        coverage[index]=nil
+      else
+        coverage[index]=sequences[newindex]
+      end
+    end
+    return {
+      coverage=coverage
+    }
+  else
+    report("unsupported subtype %a in %a substitution",subtype,what)
+  end
+end
+function gsubhandlers.multiple(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  return sethandler(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,"multiple")
+end
+function gsubhandlers.alternate(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  return sethandler(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,"alternate")
+end
+function gsubhandlers.ligature(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  local tableoffset=lookupoffset+offset
+  setposition(f,tableoffset)
+  local subtype=readushort(f)
+  if subtype==1 then
+    local coverage=readushort(f)
+    local nofsets=readushort(f)
+    local ligatures={}
+    for i=1,nofsets do
+      ligatures[i]=readushort(f)
+    end
+    for i=1,nofsets do
+      local offset=lookupoffset+offset+ligatures[i]
+      setposition(f,offset)
+      local n=readushort(f)
+      local l={}
+      for i=1,n do
+        l[i]=offset+readushort(f)
+      end
+      ligatures[i]=l
+    end
+    local coverage=readcoverage(f,tableoffset+coverage)
+    for index,newindex in next,coverage do
+      local hash={}
+      local ligatures=ligatures[newindex+1]
+      for i=1,#ligatures do
+        local offset=ligatures[i]
+        setposition(f,offset)
+        local lig=readushort(f)
+        local cnt=readushort(f)
+        local hsh=hash
+        for i=2,cnt do
+          local c=readushort(f)
+          local h=hsh[c]
+          if not h then
+            h={}
+            hsh[c]=h
+          end
+          hsh=h
+        end
+        hsh.ligature=lig
+      end
+      coverage[index]=hash
+    end
+    return {
+      coverage=coverage
+    }
+  else
+    report("unsupported subtype %a in %a substitution",subtype,"ligature")
+  end
+end
+function gsubhandlers.context(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  return unchainedcontext(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,"substitution"),"context"
+end
+function gsubhandlers.chainedcontext(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  return chainedcontext(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,"substitution"),"chainedcontext"
+end
+function gsubhandlers.extension(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  return extension(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,gsubtypes,gsubhandlers,"substitution")
+end
+function gsubhandlers.reversechainedcontextsingle(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  local tableoffset=lookupoffset+offset
+  setposition(f,tableoffset)
+  local subtype=readushort(f)
+  if subtype==1 then 
+    local current=readfirst(f)
+    local before=readarray(f)
+    local after=readarray(f)
+    local replacements=readarray(f)
+    current=readcoveragearray(f,tableoffset,current,true)
+    before=readcoveragearray(f,tableoffset,before,true)
+    after=readcoveragearray(f,tableoffset,after,true)
+    return {
+      coverage={
+        format="reversecoverage",
+        before=before,
+        current=current,
+        after=after,
+        replacements=replacements,
+      }
+    },"reversechainedcontextsingle"
+  else
+    report("unsupported subtype %a in %a substitution",subtype,"reversechainedcontextsingle")
+  end
+end
+local function readpairsets(f,tableoffset,sets,format1,format2)
+  local done={}
+  for i=1,#sets do
+    local offset=sets[i]
+    local reused=done[offset]
+    if not reused then
+      setposition(f,tableoffset+offset)
+      local n=readushort(f)
+      reused={}
+      for i=1,n do
+        reused[i]={
+          readushort(f),
+          readposition(f,format1),
+          readposition(f,format2)
+        }
+      end
+      done[offset]=reused
+    end
+    sets[i]=reused
+  end
+  return sets
+end
+local function readpairclasssets(f,nofclasses1,nofclasses2,format1,format2)
+  local classlist1={}
+  for i=1,nofclasses1 do
+    local classlist2={}
+    classlist1[i]=classlist2
+    for j=1,nofclasses2 do
+      local one=readposition(f,format1)
+      local two=readposition(f,format2)
+      if one or two then
+        classlist2[j]={ one,two }
+      else
+        classlist2[j]=false
+      end
+    end
+  end
+  return classlist1
+end
+function gposhandlers.single(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  local tableoffset=lookupoffset+offset
+  setposition(f,tableoffset)
+  local subtype=readushort(f)
+  if subtype==1 then
+    local coverage=readushort(f)
+    local format=readushort(f)
+    local value=readposition(f,format)
+    local coverage=readcoverage(f,tableoffset+coverage)
+    for index,newindex in next,coverage do
+      coverage[index]=value
+    end
+    return {
+      format="pair",
+      coverage=coverage
+    }
+  elseif subtype==2 then
+    local coverage=readushort(f)
+    local format=readushort(f)
+    local values={}
+    local nofvalues=readushort(f)
+    for i=1,nofvalues do
+      values[i]=readposition(f,format)
+    end
+    local coverage=readcoverage(f,tableoffset+coverage)
+    for index,newindex in next,coverage do
+      coverage[index]=values[newindex+1]
+    end
+    return {
+      format="pair",
+      coverage=coverage
+    }
+  else
+    report("unsupported subtype %a in %a positioning",subtype,"single")
+  end
+end
+function gposhandlers.pair(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  local tableoffset=lookupoffset+offset
+  setposition(f,tableoffset)
+  local subtype=readushort(f)
+  if subtype==1 then
+    local coverage=readushort(f)
+    local format1=readushort(f)
+    local format2=readushort(f)
+    local sets=readarray(f)
+       sets=readpairsets(f,tableoffset,sets,format1,format2)
+       coverage=readcoverage(f,tableoffset+coverage)
+    for index,newindex in next,coverage do
+      local set=sets[newindex+1]
+      local hash={}
+      for i=1,#set do
+        local value=set[i]
+        if value then
+          local other=value[1]
+          local first=value[2]
+          local second=value[3]
+          if first or second then
+            hash[other]={ first,second } 
+          else
+            hash[other]=nil
+          end
+        end
+      end
+      coverage[index]=hash
+    end
+    return {
+      format="pair",
+      coverage=coverage
+    }
+  elseif subtype==2 then
+    local coverage=readushort(f)
+    local format1=readushort(f)
+    local format2=readushort(f)
+    local classdef1=readushort(f)
+    local classdef2=readushort(f)
+    local nofclasses1=readushort(f) 
+    local nofclasses2=readushort(f) 
+    local classlist=readpairclasssets(f,nofclasses1,nofclasses2,format1,format2)
+       coverage=readcoverage(f,tableoffset+coverage)
+       classdef1=readclassdef(f,tableoffset+classdef1,coverage)
+       classdef2=readclassdef(f,tableoffset+classdef2,nofglyphs)
+    local usedcoverage={}
+    for g1,c1 in next,classdef1 do
+      if coverage[g1] then
+        local l1=classlist[c1]
+        if l1 then
+          local hash={}
+          for paired,class in next,classdef2 do
+            local offsets=l1[class]
+            if offsets then
+              local first=offsets[1]
+              local second=offsets[2]
+              if first or second then
+                hash[paired]={ first,second }
+              else
+              end
+            end
+          end
+          usedcoverage[g1]=hash
+        end
+      end
+    end
+    return {
+      format="pair",
+      coverage=usedcoverage
+    }
+  elseif subtype==3 then
+    report("yet unsupported subtype %a in %a positioning",subtype,"pair")
+  else
+    report("unsupported subtype %a in %a positioning",subtype,"pair")
+  end
+end
+function gposhandlers.cursive(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  local tableoffset=lookupoffset+offset
+  setposition(f,tableoffset)
+  local subtype=readushort(f)
+  if subtype==1 then
+    local coverage=tableoffset+readushort(f)
+    local nofrecords=readushort(f)
+    local records={}
+    for i=1,nofrecords do
+      local entry=readushort(f)
+      local exit=readushort(f)
+      records[i]={
+        entry=entry~=0 and (tableoffset+entry) or false,
+        exit=exit~=0 and (tableoffset+exit ) or false,
+      }
+    end
+    coverage=readcoverage(f,coverage)
+    for i=1,nofrecords do
+      local r=records[i]
+      records[i]={
+        1,
+        readanchor(f,r.entry) or nil,
+        readanchor(f,r.exit ) or nil,
+      }
+    end
+    for index,newindex in next,coverage do
+      coverage[index]=records[newindex+1]
+    end
+    return {
+      coverage=coverage
+    }
+  else
+    report("unsupported subtype %a in %a positioning",subtype,"cursive")
+  end
+end
+local function handlemark(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,ligature)
+  local tableoffset=lookupoffset+offset
+  setposition(f,tableoffset)
+  local subtype=readushort(f)
+  if subtype==1 then
+    local markcoverage=tableoffset+readushort(f)
+    local basecoverage=tableoffset+readushort(f)
+    local nofclasses=readushort(f)
+    local markoffset=tableoffset+readushort(f)
+    local baseoffset=tableoffset+readushort(f)
+    local markcoverage=readcoverage(f,markcoverage)
+    local basecoverage=readcoverage(f,basecoverage,true)
+    setposition(f,markoffset)
+    local markclasses={}
+    local nofmarkclasses=readushort(f)
+    local lastanchor=fontdata.lastanchor or 0
+    local usedanchors={}
+    for i=1,nofmarkclasses do
+      local class=readushort(f)+1
+      local offset=readushort(f)
+      if offset==0 then
+        markclasses[i]=false
+      else
+        markclasses[i]={ class,markoffset+offset }
+      end
+      usedanchors[class]=true
+    end
+    for i=1,nofmarkclasses do
+      local mc=markclasses[i]
+      if mc then
+        mc[2]=readanchor(f,mc[2])
+      end
+    end
+    setposition(f,baseoffset)
+    local nofbaserecords=readushort(f)
+    local baserecords={}
+    if ligature then
+      for i=1,nofbaserecords do 
+        local offset=readushort(f)
+        if offset==0 then
+          baserecords[i]=false
+        else
+          baserecords[i]=baseoffset+offset
+        end
+      end
+      for i=1,nofbaserecords do
+        local recordoffset=baserecords[i]
+        if recordoffset then
+          setposition(f,recordoffset)
+          local nofcomponents=readushort(f)
+          local components={}
+          for i=1,nofcomponents do
+            local classes={}
+            for i=1,nofclasses do
+              local offset=readushort(f)
+              if offset~=0 then
+                classes[i]=recordoffset+offset
+              else
+                classes[i]=false
+              end
+            end
+            components[i]=classes
+          end
+          baserecords[i]=components
+        end
+      end
+      local baseclasses={} 
+      for i=1,nofclasses do
+        baseclasses[i]={}
+      end
+      for i=1,nofbaserecords do
+        local components=baserecords[i]
+        if components then
+          local b=basecoverage[i]
+          for c=1,#components do
+            local classes=components[c]
+            if classes then
+              for i=1,nofclasses do
+                local anchor=readanchor(f,classes[i])
+                local bclass=baseclasses[i]
+                local bentry=bclass[b]
+                if bentry then
+                  bentry[c]=anchor
+                else
+                  bclass[b]={ [c]=anchor }
+                end
+              end
+            end
+          end
+        end
+      end
+      for index,newindex in next,markcoverage do
+        markcoverage[index]=markclasses[newindex+1] or nil
+      end
+      return {
+        format="ligature",
+        baseclasses=baseclasses,
+        coverage=markcoverage,
+      }
+    else
+      for i=1,nofbaserecords do
+        local r={}
+        for j=1,nofclasses do
+          local offset=readushort(f)
+          if offset==0 then
+            r[j]=false
+          else
+            r[j]=baseoffset+offset
+          end
+        end
+        baserecords[i]=r
+      end
+      local baseclasses={} 
+      for i=1,nofclasses do
+        baseclasses[i]={}
+      end
+      for i=1,nofbaserecords do
+        local r=baserecords[i]
+        local b=basecoverage[i]
+        for j=1,nofclasses do
+          baseclasses[j][b]=readanchor(f,r[j])
+        end
+      end
+      for index,newindex in next,markcoverage do
+        markcoverage[index]=markclasses[newindex+1] or nil
+      end
+      return {
+        format="base",
+        baseclasses=baseclasses,
+        coverage=markcoverage,
+      }
+    end
+  else
+    report("unsupported subtype %a in",subtype)
+  end
+end
+function gposhandlers.marktobase(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  return handlemark(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+end
+function gposhandlers.marktoligature(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  return handlemark(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,true)
+end
+function gposhandlers.marktomark(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  return handlemark(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+end
+function gposhandlers.context(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  return unchainedcontext(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,"positioning"),"context"
+end
+function gposhandlers.chainedcontext(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  return chainedcontext(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,"positioning"),"chainedcontext"
+end
+function gposhandlers.extension(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  return extension(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,gpostypes,gposhandlers,"positioning")
+end
+do
+  local plugins={}
+  function plugins.size(f,fontdata,tableoffset,feature)
+    if fontdata.designsize then
+    else
+      local function check(offset)
+        setposition(f,offset)
+        local designsize=readushort(f)
+        if designsize>0 then 
+          local fontstyle=readushort(f)
+          local guimenuid=readushort(f)
+          local minsize=readushort(f)
+          local maxsize=readushort(f)
+          if minsize==0 and maxsize==0 and fontstyleid==0 and guimenuid==0 then
+            minsize=designsize
+            maxsize=designsize
+          end
+          if designsize>=minsize and designsize<=maxsize then
+            return minsize,maxsize,designsize
+          end
+        end
+      end
+      local minsize,maxsize,designsize=check(tableoffset+feature.offset+feature.parameters)
+      if not designsize then
+        minsize,maxsize,designsize=check(tableoffset+feature.parameters)
+        if designsize then
+          report("bad size feature in %a, falling back to wrong offset",fontdata.filename or "?")
+        else
+          report("bad size feature in %a,",fontdata.filename or "?")
+        end
+      end
+      if designsize then
+        fontdata.minsize=minsize
+        fontdata.maxsize=maxsize
+        fontdata.designsize=designsize
+      end
+    end
+  end
+  local function reorderfeatures(fontdata,scripts,features)
+    local scriptlangs={}
+    local featurehash={}
+    local featureorder={}
+    for script,languages in next,scripts do
+      for language,record in next,languages do
+        local hash={}
+        local list=record.featureindices
+        for k=1,#list do
+          local index=list[k]
+          local feature=features[index]
+          local lookups=feature.lookups
+          local tag=feature.tag
+          if tag then
+            hash[tag]=true
+          end
+          if lookups then
+            for i=1,#lookups do
+              local lookup=lookups[i]
+              local o=featureorder[lookup]
+              if o then
+                local okay=true
+                for i=1,#o do
+                  if o[i]==tag then
+                    okay=false
+                    break
+                  end
+                end
+                if okay then
+                  o[#o+1]=tag
+                end
+              else
+                featureorder[lookup]={ tag }
+              end
+              local f=featurehash[lookup]
+              if f then
+                local h=f[tag]
+                if h then
+                  local s=h[script]
+                  if s then
+                    s[language]=true
+                  else
+                    h[script]={ [language]=true }
+                  end
+                else
+                  f[tag]={ [script]={ [language]=true } }
+                end
+              else
+                featurehash[lookup]={ [tag]={ [script]={ [language]=true } } }
+              end
+              local h=scriptlangs[tag]
+              if h then
+                local s=h[script]
+                if s then
+                  s[language]=true
+                else
+                  h[script]={ [language]=true }
+                end
+              else
+                scriptlangs[tag]={ [script]={ [language]=true } }
+              end
+            end
+          end
+        end
+      end
+    end
+    return scriptlangs,featurehash,featureorder
+  end
+  local function readscriplan(f,fontdata,scriptoffset)
+    setposition(f,scriptoffset)
+    local nofscripts=readushort(f)
+    local scripts={}
+    for i=1,nofscripts do
+      scripts[readtag(f)]=scriptoffset+readushort(f)
+    end
+    local languagesystems=setmetatableindex("table")
+    for script,offset in next,scripts do
+      setposition(f,offset)
+      local defaultoffset=readushort(f)
+      local noflanguages=readushort(f)
+      local languages={}
+      if defaultoffset>0 then
+        languages.dflt=languagesystems[offset+defaultoffset]
+      end
+      for i=1,noflanguages do
+        local language=readtag(f)
+        local offset=offset+readushort(f)
+        languages[language]=languagesystems[offset]
+      end
+      scripts[script]=languages
+    end
+    for offset,usedfeatures in next,languagesystems do
+      if offset>0 then
+        setposition(f,offset)
+        local featureindices={}
+        usedfeatures.featureindices=featureindices
+        usedfeatures.lookuporder=readushort(f) 
+        usedfeatures.requiredindex=readushort(f) 
+        local noffeatures=readushort(f)
+        for i=1,noffeatures do
+          featureindices[i]=readushort(f)+1
+        end
+      end
+    end
+    return scripts
+  end
+  local function readfeatures(f,fontdata,featureoffset)
+    setposition(f,featureoffset)
+    local features={}
+    local noffeatures=readushort(f)
+    for i=1,noffeatures do
+      features[i]={
+        tag=readtag(f),
+        offset=readushort(f)
+      }
+    end
+    for i=1,noffeatures do
+      local feature=features[i]
+      local offset=featureoffset+feature.offset
+      setposition(f,offset)
+      local parameters=readushort(f) 
+      local noflookups=readushort(f)
+      if noflookups>0 then
+        local lookups={}
+        feature.lookups=lookups
+        for j=1,noflookups do
+          lookups[j]=readushort(f)+1
+        end
+      end
+      if parameters>0 then
+        feature.parameters=parameters
+        local plugin=plugins[feature.tag]
+        if plugin then
+          plugin(f,fontdata,featureoffset,feature)
+        end
+      end
+    end
+    return features
+  end
+  local function readlookups(f,lookupoffset,lookuptypes,featurehash,featureorder)
+    setposition(f,lookupoffset)
+    local lookups={}
+    local noflookups=readushort(f)
+    for i=1,noflookups do
+      lookups[i]=readushort(f)
+    end
+    for lookupid=1,noflookups do
+      local index=lookups[lookupid]
+      setposition(f,lookupoffset+index)
+      local subtables={}
+      local typebits=readushort(f)
+      local flagbits=readushort(f)
+      local lookuptype=lookuptypes[typebits]
+      local lookupflags=lookupflags[flagbits]
+      local nofsubtables=readushort(f)
+      for j=1,nofsubtables do
+        local offset=readushort(f)
+        subtables[j]=offset+index 
+      end
+      local markclass=bittest(flagbits,0x0010) 
+      if markclass then
+        markclass=readushort(f) 
+      end
+      local markset=rshift(flagbits,8)
+      if markset>0 then
+        markclass=markset 
+      end
+      lookups[lookupid]={
+        type=lookuptype,
+        flags=lookupflags,
+        name=lookupid,
+        subtables=subtables,
+        markclass=markclass,
+        features=featurehash[lookupid],
+        order=featureorder[lookupid],
+      }
+    end
+    return lookups
+  end
+  local function readscriptoffsets(f,fontdata,tableoffset)
+    if not tableoffset then
+      return
+    end
+    setposition(f,tableoffset)
+    local version=readulong(f)
+    if version~=0x00010000 then
+      report("table version %a of %a is not supported (yet), maybe font %s is bad",version,what,fontdata.filename)
+      return
+    end
+    return tableoffset+readushort(f),tableoffset+readushort(f),tableoffset+readushort(f)
+  end
+  local f_lookupname=formatters["%s_%s_%s"]
+  local function resolvelookups(f,lookupoffset,fontdata,lookups,lookuptypes,lookuphandlers,what)
+    local sequences=fontdata.sequences  or {}
+    local sublookuplist=fontdata.sublookups or {}
+    fontdata.sequences=sequences
+    fontdata.sublookups=sublookuplist
+    local nofsublookups=#sublookuplist
+    local nofsequences=#sequences 
+    local lastsublookup=nofsublookups
+    local lastsequence=nofsequences
+    local lookupnames=lookupnames[what]
+    local sublookuphash={}
+    local sublookupcheck={}
+    local glyphs=fontdata.glyphs
+    local nofglyphs=fontdata.nofglyphs or #glyphs
+    local noflookups=#lookups
+    local lookupprefix=sub(what,2,2)
+    for lookupid=1,noflookups do
+      local lookup=lookups[lookupid]
+      local lookuptype=lookup.type
+      local subtables=lookup.subtables
+      local features=lookup.features
+      local handler=lookuphandlers[lookuptype]
+      if handler then
+        local nofsubtables=#subtables
+        local order=lookup.order
+        local flags=lookup.flags
+        if flags[1] then flags[1]="mark" end
+        if flags[2] then flags[2]="ligature" end
+        if flags[3] then flags[3]="base" end
+        local markclass=lookup.markclass
+        if nofsubtables>0 then
+          local steps={}
+          local nofsteps=0
+          local oldtype=nil
+          for s=1,nofsubtables do
+            local step,lt=handler(f,fontdata,lookupid,lookupoffset,subtables[s],glyphs,nofglyphs)
+            if lt then
+              lookuptype=lt
+              if oldtype and lt~=oldtype then
+                report("messy %s lookup type %a and %a",what,lookuptype,oldtype)
+              end
+              oldtype=lookuptype
+            end
+            if not step then
+              report("unsupported %s lookup type %a",what,lookuptype)
+            else
+              nofsteps=nofsteps+1
+              steps[nofsteps]=step
+              local rules=step.rules
+              if rules then
+                for i=1,#rules do
+                  local rule=rules[i]
+                  local before=rule.before
+                  local current=rule.current
+                  local after=rule.after
+                  if before then
+                    for i=1,#before do
+                      before[i]=tohash(before[i])
+                    end
+                    rule.before=reversed(before)
+                  end
+                  if current then
+                    for i=1,#current do
+                      current[i]=tohash(current[i])
+                    end
+                  end
+                  if after then
+                    for i=1,#after do
+                      after[i]=tohash(after[i])
+                    end
+                  end
+                end
+              end
+            end
+          end
+          if nofsteps~=nofsubtables then
+            report("bogus subtables removed in %s lookup type %a",what,lookuptype)
+          end
+          lookuptype=lookupnames[lookuptype] or lookuptype
+          if features then
+            nofsequences=nofsequences+1
+            local l={
+              index=nofsequences,
+              name=f_lookupname(lookupprefix,"s",lookupid+lookupidoffset),
+              steps=steps,
+              nofsteps=nofsteps,
+              type=lookuptype,
+              markclass=markclass or nil,
+              flags=flags,
+              order=order,
+              features=features,
+            }
+            sequences[nofsequences]=l
+            lookup.done=l
+          else
+            nofsublookups=nofsublookups+1
+            local l={
+              index=nofsublookups,
+              name=f_lookupname(lookupprefix,"l",lookupid+lookupidoffset),
+              steps=steps,
+              nofsteps=nofsteps,
+              type=lookuptype,
+              markclass=markclass or nil,
+              flags=flags,
+            }
+            sublookuplist[nofsublookups]=l
+            sublookuphash[lookupid]=nofsublookups
+            sublookupcheck[lookupid]=0
+            lookup.done=l
+          end
+        else
+          report("no subtables for lookup %a",lookupid)
+        end
+      else
+        report("no handler for lookup %a with type %a",lookupid,lookuptype)
+      end
+    end
+    local reported={}
+    local function report_issue(i,what,sequence,kind)
+      local name=sequence.name
+      if not reported[name] then
+        report("rule %i in %s lookup %a has %s lookups",i,what,name,kind)
+        reported[name]=true
+      end
+    end
+    for i=lastsequence+1,nofsequences do
+      local sequence=sequences[i]
+      local steps=sequence.steps
+      for i=1,#steps do
+        local step=steps[i]
+        local rules=step.rules
+        if rules then
+          for i=1,#rules do
+            local rule=rules[i]
+            local rlookups=rule.lookups
+            if not rlookups then
+              report_issue(i,what,sequence,"no")
+            elseif not next(rlookups) then
+              report_issue(i,what,sequence,"empty")
+              rule.lookups=nil
+            else
+              local length=#rlookups
+              for index=1,length do
+                local lookupid=rlookups[index]
+                if lookupid then
+                  local h=sublookuphash[lookupid]
+                  if not h then
+                    local lookup=lookups[lookupid]
+                    if lookup then
+                      local d=lookup.done
+                      if d then
+                        nofsublookups=nofsublookups+1
+                        h={
+                          index=nofsublookups,
+                          name=f_lookupname(lookupprefix,"d",lookupid+lookupidoffset),
+                          derived=true,
+                          steps=d.steps,
+                          nofsteps=d.nofsteps,
+                          type=d.lookuptype,
+                          markclass=d.markclass or nil,
+                          flags=d.flags,
+                        }
+                        sublookuplist[nofsublookups]=copy(h) 
+                        sublookuphash[lookupid]=nofsublookups
+                        sublookupcheck[lookupid]=1
+                        h=nofsublookups 
+                      else
+                        report_issue(i,what,sequence,"missing")
+                        rule.lookups=nil
+                        break
+                      end
+                    else
+                      report_issue(i,what,sequence,"bad")
+                      rule.lookups=nil
+                      break
+                    end
+                  else
+                    sublookupcheck[lookupid]=sublookupcheck[lookupid]+1
+                  end
+                  rlookups[index]=h or false
+                else
+                  rlookups[index]=false
+                end
+              end
+            end
+          end
+        end
+      end
+    end
+    for i,n in sortedhash(sublookupcheck) do
+      local l=lookups[i]
+      local t=l.type
+      if n==0 and t~="extension" then
+        local d=l.done
+        report("%s lookup %s of type %a is not used",what,d and d.name or l.name,t)
+      end
+    end
+  end
+  local function readscripts(f,fontdata,what,lookuptypes,lookuphandlers,lookupstoo)
+    local datatable=fontdata.tables[what]
+    if not datatable then
+      return
+    end
+    local tableoffset=datatable.offset
+    if not tableoffset then
+      return
+    end
+    local scriptoffset,featureoffset,lookupoffset=readscriptoffsets(f,fontdata,tableoffset)
+    if not scriptoffset then
+      return
+    end
+    local scripts=readscriplan(f,fontdata,scriptoffset)
+    local features=readfeatures(f,fontdata,featureoffset)
+    local scriptlangs,featurehash,featureorder=reorderfeatures(fontdata,scripts,features)
+    if fontdata.features then
+      fontdata.features[what]=scriptlangs
+    else
+      fontdata.features={ [what]=scriptlangs }
+    end
+    if not lookupstoo then
+      return
+    end
+    local lookups=readlookups(f,lookupoffset,lookuptypes,featurehash,featureorder)
+    if lookups then
+      resolvelookups(f,lookupoffset,fontdata,lookups,lookuptypes,lookuphandlers,what)
+    end
+  end
+  local function checkkerns(f,fontdata,specification)
+    local datatable=fontdata.tables.kern
+    if not datatable then
+      return 
+    end
+    local features=fontdata.features
+    local gposfeatures=features and features.gpos
+    local name
+    if not gposfeatures or not gposfeatures.kern then
+      name="kern"
+    elseif specification.globalkerns then
+      name="globalkern"
+    else
+      report("ignoring global kern table using gpos kern feature")
+      return
+    end
+    report("adding global kern table as gpos feature %a",name)
+    setposition(f,datatable.offset)
+    local version=readushort(f)
+    local noftables=readushort(f)
+    local kerns=setmetatableindex("table")
+    for i=1,noftables do
+      local version=readushort(f)
+      local length=readushort(f)
+      local coverage=readushort(f)
+      local format=bit32.rshift(coverage,8) 
+      if format==0 then
+        local nofpairs=readushort(f)
+        local searchrange=readushort(f)
+        local entryselector=readushort(f)
+        local rangeshift=readushort(f)
+        for i=1,nofpairs do
+          kerns[readushort(f)][readushort(f)]=readfword(f)
+        end
+      elseif format==2 then
+      else
+      end
+    end
+    local feature={ dflt={ dflt=true } }
+    if not features then
+      fontdata.features={ gpos={ [name]=feature } }
+    elseif not gposfeatures then
+      fontdata.features.gpos={ [name]=feature }
+    else
+      gposfeatures[name]=feature
+    end
+    local sequences=fontdata.sequences
+    if not sequences then
+      sequences={}
+      fontdata.sequences=sequences
+    end
+    local nofsequences=#sequences+1
+    sequences[nofsequences]={
+      index=nofsequences,
+      name=name,
+      steps={
+        {
+          coverage=kerns,
+          format="kern",
+        },
+      },
+      nofsteps=1,
+      type="gpos_pair",
+      flags={ false,false,false,false },
+      order={ name },
+      features={ [name]=feature },
+    }
+  end
+  function readers.gsub(f,fontdata,specification)
+    if specification.details then
+      readscripts(f,fontdata,"gsub",gsubtypes,gsubhandlers,specification.lookups)
+    end
+  end
+  function readers.gpos(f,fontdata,specification)
+    if specification.details then
+      readscripts(f,fontdata,"gpos",gpostypes,gposhandlers,specification.lookups)
+      if specification.lookups then
+        checkkerns(f,fontdata,specification)
+      end
+    end
+  end
+end
+function readers.gdef(f,fontdata,specification)
+  if specification.glyphs then
+    local datatable=fontdata.tables.gdef
+    if datatable then
+      local tableoffset=datatable.offset
+      setposition(f,tableoffset)
+      local version=readulong(f)
+      local classoffset=tableoffset+readushort(f)
+      local attachmentoffset=tableoffset+readushort(f) 
+      local ligaturecarets=tableoffset+readushort(f) 
+      local markclassoffset=tableoffset+readushort(f)
+      local marksetsoffset=version==0x00010002 and (tableoffset+readushort(f))
+      local glyphs=fontdata.glyphs
+      local marks={}
+      local markclasses=setmetatableindex("table")
+      local marksets=setmetatableindex("table")
+      fontdata.marks=marks
+      fontdata.markclasses=markclasses
+      fontdata.marksets=marksets
+      setposition(f,classoffset)
+      local classformat=readushort(f)
+      if classformat==1 then
+        local firstindex=readushort(f)
+        local lastindex=firstindex+readushort(f)-1
+        for index=firstindex,lastindex do
+          local class=classes[readushort(f)]
+          if class=="mark" then
+            marks[index]=true
+          end
+          glyphs[index].class=class
+        end
+      elseif classformat==2 then
+        local nofranges=readushort(f)
+        for i=1,nofranges do
+          local firstindex=readushort(f)
+          local lastindex=readushort(f)
+          local class=classes[readushort(f)]
+          if class then
+            for index=firstindex,lastindex do
+              glyphs[index].class=class
+              if class=="mark" then
+                marks[index]=true
+              end
+            end
+          end
+        end
+      end
+      setposition(f,markclassoffset)
+      local classformat=readushort(f)
+      if classformat==1 then
+        local firstindex=readushort(f)
+        local lastindex=firstindex+readushort(f)-1
+        for index=firstindex,lastindex do
+          markclasses[readushort(f)][index]=true
+        end
+      elseif classformat==2 then
+        local nofranges=readushort(f)
+        for i=1,nofranges do
+          local firstindex=readushort(f)
+          local lastindex=readushort(f)
+          local class=markclasses[readushort(f)]
+          for index=firstindex,lastindex do
+            class[index]=true
+          end
+        end
+      end
+      if marksetsoffset and marksetsoffset>tableoffset then 
+        setposition(f,marksetsoffset)
+        local format=readushort(f)
+        if format==1 then
+          local nofsets=readushort(f)
+          local sets={}
+          for i=1,nofsets do
+            sets[i]=readulong(f)
+          end
+          for i=1,nofsets do
+            local offset=sets[i]
+            if offset~=0 then
+              marksets[i]=readcoverage(f,marksetsoffset+offset)
+            end
+          end
+        end
+      end
+    end
+  end
+end
+local function readmathvalue(f)
+  local v=readshort(f)
+  skipshort(f,1) 
+  return v
+end
+local function readmathconstants(f,fontdata,offset)
+  setposition(f,offset)
+  fontdata.mathconstants={
+    ScriptPercentScaleDown=readshort(f),
+    ScriptScriptPercentScaleDown=readshort(f),
+    DelimitedSubFormulaMinHeight=readushort(f),
+    DisplayOperatorMinHeight=readushort(f),
+    MathLeading=readmathvalue(f),
+    AxisHeight=readmathvalue(f),
+    AccentBaseHeight=readmathvalue(f),
+    FlattenedAccentBaseHeight=readmathvalue(f),
+    SubscriptShiftDown=readmathvalue(f),
+    SubscriptTopMax=readmathvalue(f),
+    SubscriptBaselineDropMin=readmathvalue(f),
+    SuperscriptShiftUp=readmathvalue(f),
+    SuperscriptShiftUpCramped=readmathvalue(f),
+    SuperscriptBottomMin=readmathvalue(f),
+    SuperscriptBaselineDropMax=readmathvalue(f),
+    SubSuperscriptGapMin=readmathvalue(f),
+    SuperscriptBottomMaxWithSubscript=readmathvalue(f),
+    SpaceAfterScript=readmathvalue(f),
+    UpperLimitGapMin=readmathvalue(f),
+    UpperLimitBaselineRiseMin=readmathvalue(f),
+    LowerLimitGapMin=readmathvalue(f),
+    LowerLimitBaselineDropMin=readmathvalue(f),
+    StackTopShiftUp=readmathvalue(f),
+    StackTopDisplayStyleShiftUp=readmathvalue(f),
+    StackBottomShiftDown=readmathvalue(f),
+    StackBottomDisplayStyleShiftDown=readmathvalue(f),
+    StackGapMin=readmathvalue(f),
+    StackDisplayStyleGapMin=readmathvalue(f),
+    StretchStackTopShiftUp=readmathvalue(f),
+    StretchStackBottomShiftDown=readmathvalue(f),
+    StretchStackGapAboveMin=readmathvalue(f),
+    StretchStackGapBelowMin=readmathvalue(f),
+    FractionNumeratorShiftUp=readmathvalue(f),
+    FractionNumeratorDisplayStyleShiftUp=readmathvalue(f),
+    FractionDenominatorShiftDown=readmathvalue(f),
+    FractionDenominatorDisplayStyleShiftDown=readmathvalue(f),
+    FractionNumeratorGapMin=readmathvalue(f),
+    FractionNumeratorDisplayStyleGapMin=readmathvalue(f),
+    FractionRuleThickness=readmathvalue(f),
+    FractionDenominatorGapMin=readmathvalue(f),
+    FractionDenominatorDisplayStyleGapMin=readmathvalue(f),
+    SkewedFractionHorizontalGap=readmathvalue(f),
+    SkewedFractionVerticalGap=readmathvalue(f),
+    OverbarVerticalGap=readmathvalue(f),
+    OverbarRuleThickness=readmathvalue(f),
+    OverbarExtraAscender=readmathvalue(f),
+    UnderbarVerticalGap=readmathvalue(f),
+    UnderbarRuleThickness=readmathvalue(f),
+    UnderbarExtraDescender=readmathvalue(f),
+    RadicalVerticalGap=readmathvalue(f),
+    RadicalDisplayStyleVerticalGap=readmathvalue(f),
+    RadicalRuleThickness=readmathvalue(f),
+    RadicalExtraAscender=readmathvalue(f),
+    RadicalKernBeforeDegree=readmathvalue(f),
+    RadicalKernAfterDegree=readmathvalue(f),
+    RadicalDegreeBottomRaisePercent=readshort(f),
+  }
+end
+local function readmathglyphinfo(f,fontdata,offset)
+  setposition(f,offset)
+  local italics=readushort(f)
+  local accents=readushort(f)
+  local extensions=readushort(f)
+  local kerns=readushort(f)
+  local glyphs=fontdata.glyphs
+  if italics~=0 then
+    setposition(f,offset+italics)
+    local coverage=readushort(f)
+    local nofglyphs=readushort(f)
+    coverage=readcoverage(f,offset+italics+coverage,true)
+    setposition(f,offset+italics+4)
+    for i=1,nofglyphs do
+      local italic=readmathvalue(f)
+      if italic~=0 then
+        local glyph=glyphs[coverage[i]]
+        local math=glyph.math
+        if not math then
+          glyph.math={ italic=italic }
+        else
+          math.italic=italic
+        end
+      end
+    end
+    fontdata.hasitalics=true
+  end
+  if accents~=0 then
+    setposition(f,offset+accents)
+    local coverage=readushort(f)
+    local nofglyphs=readushort(f)
+    coverage=readcoverage(f,offset+accents+coverage,true)
+    setposition(f,offset+accents+4)
+    for i=1,nofglyphs do
+      local accent=readmathvalue(f)
+      if accent~=0 then
+        local glyph=glyphs[coverage[i]]
+        local math=glyph.math
+        if not math then
+          glyph.math={ accent=accent }
+        else
+          math.accent=accent
+        end
+      end
+    end
+  end
+  if extensions~=0 then
+    setposition(f,offset+extensions)
+  end
+  if kerns~=0 then
+    local kernoffset=offset+kerns
+    setposition(f,kernoffset)
+    local coverage=readushort(f)
+    local nofglyphs=readushort(f)
+    if nofglyphs>0 then
+      local function get(offset)
+        setposition(f,kernoffset+offset)
+        local n=readushort(f)
+        if n==0 then
+          local k=readmathvalue(f)
+          if k==0 then
+          else
+            return { { kern=k } }
+          end
+        else
+          local l={}
+          for i=1,n do
+            l[i]={ height=readmathvalue(f) }
+          end
+          for i=1,n do
+            l[i].kern=readmathvalue(f)
+          end
+          l[n+1]={ kern=readmathvalue(f) }
+          return l
+        end
+      end
+      local kernsets={}
+      for i=1,nofglyphs do
+        local topright=readushort(f)
+        local topleft=readushort(f)
+        local bottomright=readushort(f)
+        local bottomleft=readushort(f)
+        kernsets[i]={
+          topright=topright~=0 and topright  or nil,
+          topleft=topleft~=0 and topleft   or nil,
+          bottomright=bottomright~=0 and bottomright or nil,
+          bottomleft=bottomleft~=0 and bottomleft or nil,
+        }
+      end
+      coverage=readcoverage(f,kernoffset+coverage,true)
+      for i=1,nofglyphs do
+        local kernset=kernsets[i]
+        if next(kernset) then
+          local k=kernset.topright  if k then kernset.topright=get(k) end
+          local k=kernset.topleft   if k then kernset.topleft=get(k) end
+          local k=kernset.bottomright if k then kernset.bottomright=get(k) end
+          local k=kernset.bottomleft if k then kernset.bottomleft=get(k) end
+          if next(kernset) then
+            local glyph=glyphs[coverage[i]]
+            local math=glyph.math
+            if math then
+              math.kerns=kernset
+            else
+              glyph.math={ kerns=kernset }
+            end
+          end
+        end
+      end
+    end
+  end
+end
+local function readmathvariants(f,fontdata,offset)
+  setposition(f,offset)
+  local glyphs=fontdata.glyphs
+  local minoverlap=readushort(f)
+  local vcoverage=readushort(f)
+  local hcoverage=readushort(f)
+  local vnofglyphs=readushort(f)
+  local hnofglyphs=readushort(f)
+  local vconstruction={}
+  local hconstruction={}
+  for i=1,vnofglyphs do
+    vconstruction[i]=readushort(f)
+  end
+  for i=1,hnofglyphs do
+    hconstruction[i]=readushort(f)
+  end
+  fontdata.mathconstants.MinConnectorOverlap=minoverlap
+  local function get(offset,coverage,nofglyphs,construction,kvariants,kparts,kitalic)
+    if coverage~=0 and nofglyphs>0 then
+      local coverage=readcoverage(f,offset+coverage,true)
+      for i=1,nofglyphs do
+        local c=construction[i]
+        if c~=0 then
+          local index=coverage[i]
+          local glyph=glyphs[index]
+          local math=glyph.math
+          setposition(f,offset+c)
+          local assembly=readushort(f)
+          local nofvariants=readushort(f)
+          if nofvariants>0 then
+            local variants,v=nil,0
+            for i=1,nofvariants do
+              local variant=readushort(f)
+              if variant==index then
+              elseif variants then
+                v=v+1
+                variants[v]=variant
+              else
+                v=1
+                variants={ variant }
+              end
+              skipshort(f)
+            end
+            if not variants then
+            elseif not math then
+              math={ [kvariants]=variants }
+              glyph.math=math
+            else
+              math[kvariants]=variants
+            end
+          end
+          if assembly~=0 then
+            setposition(f,offset+c+assembly)
+            local italic=readmathvalue(f)
+            local nofparts=readushort(f)
+            local parts={}
+            for i=1,nofparts do
+              local p={
+                glyph=readushort(f),
+                start=readushort(f),
+                ["end"]=readushort(f),
+                advance=readushort(f),
+              }
+              local flags=readushort(f)
+              if bittest(flags,0x0001) then
+                p.extender=1 
+              end
+              parts[i]=p
+            end
+            if not math then
+              math={
+                [kparts]=parts
+              }
+              glyph.math=math
+            else
+              math[kparts]=parts
+            end
+            if italic and italic~=0 then
+              math[kitalic]=italic
+            end
+          end
+        end
+      end
+    end
+  end
+  get(offset,vcoverage,vnofglyphs,vconstruction,"vvariants","vparts","vitalic")
+  get(offset,hcoverage,hnofglyphs,hconstruction,"hvariants","hparts","hitalic")
+end
+function readers.math(f,fontdata,specification)
+  if specification.glyphs then
+    local datatable=fontdata.tables.math
+    if datatable then
+      local tableoffset=datatable.offset
+      setposition(f,tableoffset)
+      local version=readulong(f)
+      if version~=0x00010000 then
+        report("table version %a of %a is not supported (yet), maybe font %s is bad",version,"math",fontdata.filename)
+        return
+      end
+      local constants=readushort(f)
+      local glyphinfo=readushort(f)
+      local variants=readushort(f)
+      if constants==0 then
+        report("the math table of %a has no constants",fontdata.filename)
+      else
+        readmathconstants(f,fontdata,tableoffset+constants)
+      end
+      if glyphinfo~=0 then
+        readmathglyphinfo(f,fontdata,tableoffset+glyphinfo)
+      end
+      if variants~=0 then
+        readmathvariants(f,fontdata,tableoffset+variants)
+      end
+    end
+  end
+end
+function readers.colr(f,fontdata,specification)
+  local datatable=fontdata.tables.colr
+  if datatable then
+    if specification.glyphs then
+      local tableoffset=datatable.offset
+      setposition(f,tableoffset)
+      local version=readushort(f)
+      if version~=0 then
+        report("table version %a of %a is not supported (yet), maybe font %s is bad",version,"colr",fontdata.filename)
+        return
+      end
+      if not fontdata.tables.cpal then
+        report("color table %a in font %a has no mandate %a table","colr",fontdata.filename,"cpal")
+        fontdata.colorpalettes={}
+      end
+      local glyphs=fontdata.glyphs
+      local nofglyphs=readushort(f)
+      local baseoffset=readulong(f)
+      local layeroffset=readulong(f)
+      local noflayers=readushort(f)
+      local layerrecords={}
+      local maxclass=0
+      setposition(f,tableoffset+layeroffset)
+      for i=1,noflayers do
+        local slot=readushort(f)
+        local class=readushort(f)
+        if class<0xFFFF then
+          class=class+1
+          if class>maxclass then
+            maxclass=class
+          end
+        end
+        layerrecords[i]={
+          slot=slot,
+          class=class,
+        }
+      end
+      fontdata.maxcolorclass=maxclass
+      setposition(f,tableoffset+baseoffset)
+      for i=0,nofglyphs-1 do
+        local glyphindex=readushort(f)
+        local firstlayer=readushort(f)
+        local noflayers=readushort(f)
+        local t={}
+        for i=1,noflayers do
+          t[i]=layerrecords[firstlayer+i]
+        end
+        glyphs[glyphindex].colors=t
+      end
+    end
+    fontdata.hascolor=true
+  end
+end
+function readers.cpal(f,fontdata,specification)
+  if specification.glyphs then
+    local datatable=fontdata.tables.cpal
+    if datatable then
+      local tableoffset=datatable.offset
+      setposition(f,tableoffset)
+      local version=readushort(f)
+      if version>1 then
+        report("table version %a of %a is not supported (yet), maybe font %s is bad",version,"cpal",fontdata.filename)
+        return
+      end
+      local nofpaletteentries=readushort(f)
+      local nofpalettes=readushort(f)
+      local nofcolorrecords=readushort(f)
+      local firstcoloroffset=readulong(f)
+      local colorrecords={}
+      local palettes={}
+      for i=1,nofpalettes do
+        palettes[i]=readushort(f)
+      end
+      if version==1 then
+        local palettettypesoffset=readulong(f)
+        local palettelabelsoffset=readulong(f)
+        local paletteentryoffset=readulong(f)
+      end
+      setposition(f,tableoffset+firstcoloroffset)
+      for i=1,nofcolorrecords do
+        local b,g,r,a=readbytes(f,4)
+        colorrecords[i]={
+          r,g,b,a~=255 and a or nil,
+        }
+      end
+      for i=1,nofpalettes do
+        local p={}
+        local o=palettes[i]
+        for j=1,nofpaletteentries do
+          p[j]=colorrecords[o+j]
+        end
+        palettes[i]=p
+      end
+      fontdata.colorpalettes=palettes
+    end
+  end
+end
+function readers.svg(f,fontdata,specification)
+  local datatable=fontdata.tables.svg
+  if datatable then
+    if specification.glyphs then
+      local tableoffset=datatable.offset
+      setposition(f,tableoffset)
+      local version=readushort(f)
+      if version~=0 then
+        report("table version %a of %a is not supported (yet), maybe font %s is bad",version,"svg",fontdata.filename)
+        return
+      end
+      local glyphs=fontdata.glyphs
+      local indexoffset=tableoffset+readulong(f)
+      local reserved=readulong(f)
+      setposition(f,indexoffset)
+      local nofentries=readushort(f)
+      local entries={}
+      for i=1,nofentries do
+        entries[i]={
+          first=readushort(f),
+          last=readushort(f),
+          offset=indexoffset+readulong(f),
+          length=readulong(f),
+        }
+      end
+      for i=1,nofentries do
+        local entry=entries[i]
+        setposition(f,entry.offset)
+        entries[i]={
+          first=entry.first,
+          last=entry.last,
+          data=readstring(f,entry.length)
+        }
+      end
+      fontdata.svgshapes=entries
+    end
+    fontdata.hascolor=true
+  end
+end
+
+end --- [luaotfload, fontloader-2017-02-11.lua scope for “font-dsp”] ---
+
+
+do  --- [luaotfload, fontloader-2017-02-11.lua scope for “font-oup” f7237130b648a4c2b477dabedc7f90e8] ---
+
+if not modules then modules={} end modules ['font-oup']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local next,type=next,type
+local P,R,S=lpeg.P,lpeg.R,lpeg.S
+local lpegmatch=lpeg.match
+local insert,remove,copy,unpack=table.insert,table.remove,table.copy,table.unpack
+local formatters=string.formatters
+local sortedkeys=table.sortedkeys
+local sortedhash=table.sortedhash
+local tohash=table.tohash
+local report=logs.reporter("otf reader")
+local trace_markwidth=false trackers.register("otf.markwidth",function(v) trace_markwidth=v end)
+local readers=fonts.handlers.otf.readers
+local privateoffset=fonts.constructors and fonts.constructors.privateoffset or 0xF0000 
+local f_private=formatters["P%05X"]
+local f_unicode=formatters["U%05X"]
+local f_index=formatters["I%05X"]
+local f_character_y=formatters["%C"]
+local f_character_n=formatters["[ %C ]"]
+local check_duplicates=true 
+local check_soft_hyphen=false 
+directives.register("otf.checksofthyphen",function(v)
+  check_soft_hyphen=v
+end)
+local function replaced(list,index,replacement)
+  if type(list)=="number" then
+    return replacement
+  elseif type(replacement)=="table" then
+    local t={}
+    local n=index-1
+    for i=1,n do
+      t[i]=list[i]
+    end
+    for i=1,#replacement do
+      n=n+1
+      t[n]=replacement[i]
+    end
+    for i=index+1,#list do
+      n=n+1
+      t[n]=list[i]
+    end
+  else
+    list[index]=replacement
+    return list
+  end
+end
+local function unifyresources(fontdata,indices)
+  local descriptions=fontdata.descriptions
+  local resources=fontdata.resources
+  if not descriptions or not resources then
+    return
+  end
+  local variants=fontdata.resources.variants
+  if variants then
+    for selector,unicodes in next,variants do
+      for unicode,index in next,unicodes do
+        unicodes[unicode]=indices[index]
+      end
+    end
+  end
+  local function remark(marks)
+    if marks then
+      local newmarks={}
+      for k,v in next,marks do
+        local u=indices[k]
+        if u then
+          newmarks[u]=v
+        else
+          report("discarding mark %i",k)
+        end
+      end
+      return newmarks
+    end
+  end
+  local marks=resources.marks
+  if marks then
+    resources.marks=remark(marks)
+  end
+  local markclasses=resources.markclasses
+  if markclasses then
+    for class,marks in next,markclasses do
+      markclasses[class]=remark(marks)
+    end
+  end
+  local marksets=resources.marksets
+  if marksets then
+    for class,marks in next,marksets do
+      marksets[class]=remark(marks)
+    end
+  end
+  local done={}
+  local duplicates=check_duplicates and resources.duplicates
+  if duplicates and not next(duplicates) then
+    duplicates=false
+  end
+  local function recover(cover) 
+    for i=1,#cover do
+      local c=cover[i]
+      if not done[c] then
+        local t={}
+        for k,v in next,c do
+          t[indices[k]]=v
+        end
+        cover[i]=t
+        done[c]=d
+      end
+    end
+  end
+  local function recursed(c) 
+    local t={}
+    for g,d in next,c do
+      if type(d)=="table" then
+        t[indices[g]]=recursed(d)
+      else
+        t[g]=indices[d] 
+      end
+    end
+    return t
+  end
+  local function unifythem(sequences)
+    if not sequences then
+      return
+    end
+    for i=1,#sequences do
+      local sequence=sequences[i]
+      local kind=sequence.type
+      local steps=sequence.steps
+      local features=sequence.features
+      if steps then
+        for i=1,#steps do
+          local step=steps[i]
+          if kind=="gsub_single" then
+            local c=step.coverage
+            if c then
+              local t1=done[c]
+              if not t1 then
+                t1={}
+                if duplicates then
+                  for g1,d1 in next,c do
+                    local ug1=indices[g1]
+                    local ud1=indices[d1]
+                    t1[ug1]=ud1
+                    local dg1=duplicates[ug1]
+                    if dg1 then
+                      for u in next,dg1 do
+                        t1[u]=ud1
+                      end
+                    end
+                  end
+                else
+                  for g1,d1 in next,c do
+                    t1[indices[g1]]=indices[d1]
+                  end
+                end
+                done[c]=t1
+              end
+              step.coverage=t1
+            end
+          elseif kind=="gpos_pair" then
+            local c=step.coverage
+            if c then
+              local t1=done[c]
+              if not t1 then
+                t1={}
+                for g1,d1 in next,c do
+                  local t2=done[d1]
+                  if not t2 then
+                    t2={}
+                    for g2,d2 in next,d1 do
+                      t2[indices[g2]]=d2
+                    end
+                    done[d1]=t2
+                  end
+                  t1[indices[g1]]=t2
+                end
+                done[c]=t1
+              end
+              step.coverage=t1
+            end
+          elseif kind=="gsub_ligature" then
+            local c=step.coverage
+            if c then
+              step.coverage=recursed(c)
+            end
+          elseif kind=="gsub_alternate" or kind=="gsub_multiple" then
+            local c=step.coverage
+            if c then
+              local t1=done[c]
+              if not t1 then
+                t1={}
+                if duplicates then
+                  for g1,d1 in next,c do
+                    for i=1,#d1 do
+                      d1[i]=indices[d1[i]]
+                    end
+                    local ug1=indices[g1]
+                    t1[ug1]=d1
+                    local dg1=duplicates[ug1]
+                    if dg1 then
+                      for u in next,dg1 do
+                        t1[u]=copy(d1)
+                      end
+                    end
+                  end
+                else
+                  for g1,d1 in next,c do
+                    for i=1,#d1 do
+                      d1[i]=indices[d1[i]]
+                    end
+                    t1[indices[g1]]=d1
+                  end
+                end
+                done[c]=t1
+              end
+              step.coverage=t1
+            end
+          elseif kind=="gpos_mark2base" or kind=="gpos_mark2mark" or kind=="gpos_mark2ligature" then
+            local c=step.coverage
+            if c then
+              local t1=done[c]
+              if not t1 then
+                t1={}
+                for g1,d1 in next,c do
+                  t1[indices[g1]]=d1
+                end
+                done[c]=t1
+              end
+              step.coverage=t1
+            end
+            local c=step.baseclasses
+            if c then
+              local t1=done[c]
+              if not t1 then
+                for g1,d1 in next,c do
+                  local t2=done[d1]
+                  if not t2 then
+                    t2={}
+                    for g2,d2 in next,d1 do
+                      t2[indices[g2]]=d2
+                    end
+                    done[d1]=t2
+                  end
+                  c[g1]=t2
+                end
+                done[c]=c
+              end
+            end
+          elseif kind=="gpos_single" then
+            local c=step.coverage
+            if c then
+              local t1=done[c]
+              if not t1 then
+                t1={}
+                if duplicates then
+                  for g1,d1 in next,c do
+                    local ug1=indices[g1]
+                    t1[ug1]=d1
+                    local dg1=duplicates[ug1]
+                    if dg1 then
+                      for u in next,dg1 do
+                        t1[u]=d1
+                      end
+                    end
+                  end
+                else
+                  for g1,d1 in next,c do
+                    t1[indices[g1]]=d1
+                  end
+                end
+                done[c]=t1
+              end
+              step.coverage=t1
+            end
+          elseif kind=="gpos_cursive" then
+            local c=step.coverage
+            if c then
+              local t1=done[c]
+              if not t1 then
+                t1={}
+                if duplicates then
+                  for g1,d1 in next,c do
+                    local ug1=indices[g1]
+                    t1[ug1]=d1
+                    local dg1=duplicates[ug1]
+                    if dg1 then
+                      for u in next,dg1 do
+                        t1[u]=copy(d1)
+                      end
+                    end
+                  end
+                else
+                  for g1,d1 in next,c do
+                    t1[indices[g1]]=d1
+                  end
+                end
+                done[c]=t1
+              end
+              step.coverage=t1
+            end
+          end
+          local rules=step.rules
+          if rules then
+            for i=1,#rules do
+              local rule=rules[i]
+              local before=rule.before  if before then recover(before) end
+              local after=rule.after  if after  then recover(after)  end
+              local current=rule.current if current then recover(current) end
+              local replacements=rule.replacements
+              if replacements then
+                if not done[replacements] then
+                  local r={}
+                  for k,v in next,replacements do
+                    r[indices[k]]=indices[v]
+                  end
+                  rule.replacements=r
+                  done[replacements]=r
+                end
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+  unifythem(resources.sequences)
+  unifythem(resources.sublookups)
+end
+local function copyduplicates(fontdata)
+  if check_duplicates then
+    local descriptions=fontdata.descriptions
+    local resources=fontdata.resources
+    local duplicates=resources.duplicates
+    if check_soft_hyphen then
+      local ds=descriptions[0xAD]
+      if not ds or ds.width==0 then
+        if ds then
+          descriptions[0xAD]=nil
+          report("patching soft hyphen")
+        else
+          report("adding soft hyphen")
+        end
+        if not duplicates then
+          duplicates={}
+          resources.duplicates=duplicates
+        end
+        local dh=duplicates[0x2D]
+        if dh then
+          dh[#dh+1]={ [0xAD]=true }
+        else
+          duplicates[0x2D]={ [0xAD]=true }
+        end
+      end
+    end
+    if duplicates then
+      for u,d in next,duplicates do
+        local du=descriptions[u]
+        if du then
+          local t={ f_character_y(u),"@",f_index(du.index),"->" }
+          local n=0
+          local m=25
+          for u in next,d do
+            if descriptions[u] then
+              if n<m then
+                t[n+4]=f_character_n(u)
+              end
+            else
+              local c=copy(du)
+              c.unicode=u 
+              descriptions[u]=c
+              if n<m then
+                t[n+4]=f_character_y(u)
+              end
+            end
+            n=n+1
+          end
+          if n<=m then
+            report("duplicates: %i : % t",n,t)
+          else
+            report("duplicates: %i : % t ...",n,t)
+          end
+        else
+        end
+      end
+    end
+  end
+end
+local ignore={ 
+  ["notdef"]=true,
+  [".notdef"]=true,
+  ["null"]=true,
+  [".null"]=true,
+  ["nonmarkingreturn"]=true,
+}
+local function checklookups(fontdata,missing,nofmissing)
+  local descriptions=fontdata.descriptions
+  local resources=fontdata.resources
+  if missing and nofmissing and nofmissing<=0 then
+    return
+  end
+  local singles={}
+  local alternates={}
+  local ligatures={}
+  if not missing then
+    missing={}
+    nofmissing=0
+    for u,d in next,descriptions do
+      if not d.unicode then
+        nofmissing=nofmissing+1
+        missing[u]=true
+      end
+    end
+  end
+  local function collectthem(sequences)
+    if not sequences then
+      return
+    end
+    for i=1,#sequences do
+      local sequence=sequences[i]
+      local kind=sequence.type
+      local steps=sequence.steps
+      if steps then
+        for i=1,#steps do
+          local step=steps[i]
+          if kind=="gsub_single" then
+            local c=step.coverage
+            if c then
+              singles[#singles+1]=c
+            end
+          elseif kind=="gsub_alternate" then
+            local c=step.coverage
+            if c then
+              alternates[#alternates+1]=c
+            end
+          elseif kind=="gsub_ligature" then
+            local c=step.coverage
+            if c then
+              ligatures[#ligatures+1]=c
+            end
+          end
+        end
+      end
+    end
+  end
+  collectthem(resources.sequences)
+  collectthem(resources.sublookups)
+  local loops=0
+  while true do
+    loops=loops+1
+    local old=nofmissing
+    for i=1,#singles do
+      local c=singles[i]
+      for g1,g2 in next,c do
+        if missing[g1] then
+          local u2=descriptions[g2].unicode
+          if u2 then
+            missing[g1]=false
+            descriptions[g1].unicode=u2
+            nofmissing=nofmissing-1
+          end
+        end
+        if missing[g2] then
+          local u1=descriptions[g1].unicode
+          if u1 then
+            missing[g2]=false
+            descriptions[g2].unicode=u1
+            nofmissing=nofmissing-1
+          end
+        end
+      end
+    end
+    for i=1,#alternates do
+      local c=alternates[i]
+      for g1,d1 in next,c do
+        if missing[g1] then
+          for i=1,#d1 do
+            local g2=d1[i]
+            local u2=descriptions[g2].unicode
+            if u2 then
+              missing[g1]=false
+              descriptions[g1].unicode=u2
+              nofmissing=nofmissing-1
+            end
+          end
+        end
+        if not missing[g1] then
+          for i=1,#d1 do
+            local g2=d1[i]
+            if missing[g2] then
+              local u1=descriptions[g1].unicode
+              if u1 then
+                missing[g2]=false
+                descriptions[g2].unicode=u1
+                nofmissing=nofmissing-1
+              end
+            end
+          end
+        end
+      end
+    end
+    if nofmissing<=0 then
+      report("all done in %s loops",loops)
+      return
+    elseif old==nofmissing then
+      break
+    end
+  end
+  local t,n 
+  local function recursed(c)
+    for g,d in next,c do
+      if g~="ligature" then
+        local u=descriptions[g].unicode
+        if u then
+          n=n+1
+          t[n]=u
+          recursed(d)
+          n=n-1
+        end
+      elseif missing[d] then
+        local l={}
+        local m=0
+        for i=1,n do
+          local u=t[i]
+          if type(u)=="table" then
+            for i=1,#u do
+              m=m+1
+              l[m]=u[i]
+            end
+          else
+            m=m+1
+            l[m]=u
+          end
+        end
+        missing[d]=false
+        descriptions[d].unicode=l
+        nofmissing=nofmissing-1
+      end
+    end
+  end
+  if nofmissing>0 then
+    t={}
+    n=0
+    local loops=0
+    while true do
+      loops=loops+1
+      local old=nofmissing
+      for i=1,#ligatures do
+        recursed(ligatures[i])
+      end
+      if nofmissing<=0 then
+        report("all done in %s loops",loops)
+        return
+      elseif old==nofmissing then
+        break
+      end
+    end
+    t=nil
+    n=0
+  end
+  if nofmissing>0 then
+    local done={}
+    for i,r in next,missing do
+      if r then
+        local data=descriptions[i]
+        local name=data and data.name or f_index(i)
+        if not ignore[name] then
+          done[name]=true
+        end
+      end
+    end
+    if next(done) then
+      report("not unicoded: % t",table.sortedkeys(done))
+    end
+  end
+end
+local function unifymissing(fontdata)
+  if not fonts.mappings then
+    require("font-map")
+    require("font-agl")
+  end
+  local unicodes={}
+  local private=fontdata.private
+  local resources=fontdata.resources
+  resources.unicodes=unicodes
+  for unicode,d in next,fontdata.descriptions do
+    if unicode<privateoffset then
+      local name=d.name
+      if name then
+        unicodes[name]=unicode
+      end
+    end
+  end
+  fonts.mappings.addtounicode(fontdata,fontdata.filename,checklookups)
+  resources.unicodes=nil
+end
+local function unifyglyphs(fontdata,usenames)
+  local private=fontdata.private or privateoffset
+  local glyphs=fontdata.glyphs
+  local indices={}
+  local descriptions={}
+  local names=usenames and {}
+  local resources=fontdata.resources
+  local zero=glyphs[0]
+  local zerocode=zero.unicode
+  if not zerocode then
+    zerocode=private
+    zero.unicode=zerocode
+    private=private+1
+  end
+  descriptions[zerocode]=zero
+  if names then
+    local name=glyphs[0].name or f_private(zerocode)
+    indices[0]=name
+    names[name]=zerocode
+  else
+    indices[0]=zerocode
+  end
+  for index=1,#glyphs do
+    local glyph=glyphs[index]
+    local unicode=glyph.unicode 
+    if not unicode then
+      unicode=private
+      if names then
+        local name=glyph.name or f_private(unicode)
+        indices[index]=name
+        names[name]=unicode
+      else
+        indices[index]=unicode
+      end
+      private=private+1
+    elseif descriptions[unicode] then
+      report("assigning private unicode %U to glyph indexed %05X (%C)",private,index,unicode)
+      unicode=private
+      if names then
+        local name=glyph.name or f_private(unicode)
+        indices[index]=name
+        names[name]=unicode
+      else
+        indices[index]=unicode
+      end
+      private=private+1
+    else
+      if names then
+        local name=glyph.name or f_unicode(unicode)
+        indices[index]=name
+        names[name]=unicode
+      else
+        indices[index]=unicode
+      end
+    end
+    descriptions[unicode]=glyph
+  end
+  for index=1,#glyphs do
+    local math=glyphs[index].math
+    if math then
+      local list=math.vparts
+      if list then
+        for i=1,#list do local l=list[i] l.glyph=indices[l.glyph] end
+      end
+      local list=math.hparts
+      if list then
+        for i=1,#list do local l=list[i] l.glyph=indices[l.glyph] end
+      end
+      local list=math.vvariants
+      if list then
+        for i=1,#list do list[i]=indices[list[i]] end
+      end
+      local list=math.hvariants
+      if list then
+        for i=1,#list do list[i]=indices[list[i]] end
+      end
+    end
+  end
+  local colorpalettes=resources.colorpalettes
+  if colorpalettes then
+    for index=1,#glyphs do
+      local colors=glyphs[index].colors
+      if colors then
+        for i=1,#colors do
+          local c=colors[i]
+          c.slot=indices[c.slot]
+        end
+      end
+    end
+  end
+  fontdata.private=private
+  fontdata.glyphs=nil
+  fontdata.names=names
+  fontdata.descriptions=descriptions
+  fontdata.hashmethod=hashmethod
+  return indices,names
+end
+local p_bogusname=(
+  (P("uni")+P("UNI")+P("Uni")+P("U")+P("u"))*S("Xx")^0*R("09","AF")^1+(P("identity")+P("Identity")+P("IDENTITY"))*R("09","AF")^1+(P("index")+P("Index")+P("INDEX"))*R("09")^1
+)*P(-1)
+local function stripredundant(fontdata)
+  local descriptions=fontdata.descriptions
+  if descriptions then
+    local n=0
+    local c=0
+    for unicode,d in next,descriptions do
+      local name=d.name
+      if name and lpegmatch(p_bogusname,name) then
+        d.name=nil
+        n=n+1
+      end
+      if d.class=="base" then
+        d.class=nil
+        c=c+1
+      end
+    end
+    if n>0 then
+      report("%s bogus names removed (verbose unicode)",n)
+    end
+    if c>0 then
+      report("%s base class tags removed (default is base)",c)
+    end
+  end
+end
+function readers.getcomponents(fontdata) 
+  local resources=fontdata.resources
+  if resources then
+    local sequences=resources.sequences
+    if sequences then
+      local collected={}
+      for i=1,#sequences do
+        local sequence=sequences[i]
+        if sequence.type=="gsub_ligature" then
+          local steps=sequence.steps
+          if steps then
+            local l={}
+            local function traverse(p,k,v)
+              if k=="ligature" then
+                collected[v]={ unpack(l) }
+              else
+                insert(l,k)
+                for k,vv in next,v do
+                  traverse(p,k,vv)
+                end
+                remove(l)
+              end
+            end
+            for i=1,#steps do
+              local coverage=steps[i].coverage
+              if coverage then
+                for k,v in next,coverage do
+                  traverse(k,k,v)
+                end
+              end
+            end
+          end
+        end
+      end
+      if next(collected) then
+        while true do
+          local done=false
+          for k,v in next,collected do
+            for i=1,#v do
+              local vi=v[i]
+              if vi==k then
+                collected[k]=nil
+                break
+              else
+                local c=collected[vi]
+                if c then
+                  done=true
+                  local t={}
+                  local n=i-1
+                  for j=1,n do
+                    t[j]=v[j]
+                  end
+                  for j=1,#c do
+                    n=n+1
+                    t[n]=c[j]
+                  end
+                  for j=i+1,#v do
+                    n=n+1
+                    t[n]=v[j]
+                  end
+                  collected[k]=t
+                  break
+                end
+              end
+            end
+          end
+          if not done then
+            break
+          end
+        end
+        return collected
+      end
+    end
+  end
+end
+readers.unifymissing=unifymissing
+function readers.rehash(fontdata,hashmethod) 
+  if not (fontdata and fontdata.glyphs) then
+    return
+  end
+  if hashmethod=="indices" then
+    fontdata.hashmethod="indices"
+  elseif hashmethod=="names" then
+    fontdata.hashmethod="names"
+    local indices=unifyglyphs(fontdata,true)
+    unifyresources(fontdata,indices)
+    copyduplicates(fontdata)
+    unifymissing(fontdata)
+  else
+    fontdata.hashmethod="unicode"
+    local indices=unifyglyphs(fontdata)
+    unifyresources(fontdata,indices)
+    copyduplicates(fontdata)
+    unifymissing(fontdata)
+    stripredundant(fontdata)
+  end
+end
+function readers.checkhash(fontdata)
+  local hashmethod=fontdata.hashmethod
+  if hashmethod=="unicodes" then
+    fontdata.names=nil 
+  elseif hashmethod=="names" and fontdata.names then
+    unifyresources(fontdata,fontdata.names)
+    copyduplicates(fontdata)
+    fontdata.hashmethod="unicode"
+    fontdata.names=nil 
+  else
+    readers.rehash(fontdata,"unicode")
+  end
+end
+function readers.addunicodetable(fontdata)
+  local resources=fontdata.resources
+  local unicodes=resources.unicodes
+  if not unicodes then
+    local descriptions=fontdata.descriptions
+    if descriptions then
+      unicodes={}
+      resources.unicodes=unicodes
+      for u,d in next,descriptions do
+        local n=d.name
+        if n then
+          unicodes[n]=u
+        end
+      end
+    end
+  end
+end
+local concat,sort=table.concat,table.sort
+local next,type,tostring=next,type,tostring
+local criterium=1
+local threshold=0
+local trace_packing=false trackers.register("otf.packing",function(v) trace_packing=v end)
+local trace_loading=false trackers.register("otf.loading",function(v) trace_loading=v end)
+local report_otf=logs.reporter("fonts","otf loading")
+local function tabstr_normal(t)
+  local s={}
+  local n=0
+  for k,v in next,t do
+    n=n+1
+    if type(v)=="table" then
+      s[n]=k..">"..tabstr_normal(v)
+    elseif v==true then
+      s[n]=k.."+" 
+    elseif v then
+      s[n]=k.."="..v
+    else
+      s[n]=k.."-" 
+    end
+  end
+  if n==0 then
+    return ""
+  elseif n==1 then
+    return s[1]
+  else
+    sort(s) 
+    return concat(s,",")
+  end
+end
+local function tabstr_flat(t)
+  local s={}
+  local n=0
+  for k,v in next,t do
+    n=n+1
+    s[n]=k.."="..v
+  end
+  if n==0 then
+    return ""
+  elseif n==1 then
+    return s[1]
+  else
+    sort(s) 
+    return concat(s,",")
+  end
+end
+local function tabstr_mixed(t) 
+  local s={}
+  local n=#t
+  if n==0 then
+    return ""
+  elseif n==1 then
+    local k=t[1]
+    if k==true then
+      return "++" 
+    elseif k==false then
+      return "--" 
+    else
+      return tostring(k) 
+    end
+  else
+    for i=1,n do
+      local k=t[i]
+      if k==true then
+        s[i]="++" 
+      elseif k==false then
+        s[i]="--" 
+      else
+        s[i]=k 
+      end
+    end
+    return concat(s,",")
+  end
+end
+local function tabstr_boolean(t)
+  local s={}
+  local n=0
+  for k,v in next,t do
+    n=n+1
+    if v then
+      s[n]=k.."+"
+    else
+      s[n]=k.."-"
+    end
+  end
+  if n==0 then
+    return ""
+  elseif n==1 then
+    return s[1]
+  else
+    sort(s) 
+    return concat(s,",")
+  end
+end
+function readers.pack(data)
+  if data then
+    local h,t,c={},{},{}
+    local hh,tt,cc={},{},{}
+    local nt,ntt=0,0
+    local function pack_normal(v)
+      local tag=tabstr_normal(v)
+      local ht=h[tag]
+      if ht then
+        c[ht]=c[ht]+1
+        return ht
+      else
+        nt=nt+1
+        t[nt]=v
+        h[tag]=nt
+        c[nt]=1
+        return nt
+      end
+    end
+    local function pack_flat(v)
+      local tag=tabstr_flat(v)
+      local ht=h[tag]
+      if ht then
+        c[ht]=c[ht]+1
+        return ht
+      else
+        nt=nt+1
+        t[nt]=v
+        h[tag]=nt
+        c[nt]=1
+        return nt
+      end
+    end
+    local function pack_boolean(v)
+      local tag=tabstr_boolean(v)
+      local ht=h[tag]
+      if ht then
+        c[ht]=c[ht]+1
+        return ht
+      else
+        nt=nt+1
+        t[nt]=v
+        h[tag]=nt
+        c[nt]=1
+        return nt
+      end
+    end
+    local function pack_indexed(v)
+      local tag=concat(v," ")
+      local ht=h[tag]
+      if ht then
+        c[ht]=c[ht]+1
+        return ht
+      else
+        nt=nt+1
+        t[nt]=v
+        h[tag]=nt
+        c[nt]=1
+        return nt
+      end
+    end
+    local function pack_mixed(v)
+      local tag=tabstr_mixed(v)
+      local ht=h[tag]
+      if ht then
+        c[ht]=c[ht]+1
+        return ht
+      else
+        nt=nt+1
+        t[nt]=v
+        h[tag]=nt
+        c[nt]=1
+        return nt
+      end
+    end
+    local function pack_final(v)
+      if c[v]<=criterium then
+        return t[v]
+      else
+        local hv=hh[v]
+        if hv then
+          return hv
+        else
+          ntt=ntt+1
+          tt[ntt]=t[v]
+          hh[v]=ntt
+          cc[ntt]=c[v]
+          return ntt
+        end
+      end
+    end
+    local function success(stage,pass)
+      if nt==0 then
+        if trace_loading or trace_packing then
+          report_otf("pack quality: nothing to pack")
+        end
+        return false
+      elseif nt>=threshold then
+        local one,two,rest=0,0,0
+        if pass==1 then
+          for k,v in next,c do
+            if v==1 then
+              one=one+1
+            elseif v==2 then
+              two=two+1
+            else
+              rest=rest+1
+            end
+          end
+        else
+          for k,v in next,cc do
+            if v>20 then
+              rest=rest+1
+            elseif v>10 then
+              two=two+1
+            else
+              one=one+1
+            end
+          end
+          data.tables=tt
+        end
+        if trace_loading or trace_packing then
+          report_otf("pack quality: stage %s, pass %s, %s packed, 1-10:%s, 11-20:%s, rest:%s (criterium: %s)",
+            stage,pass,one+two+rest,one,two,rest,criterium)
+        end
+        return true
+      else
+        if trace_loading or trace_packing then
+          report_otf("pack quality: stage %s, pass %s, %s packed, aborting pack (threshold: %s)",
+            stage,pass,nt,threshold)
+        end
+        return false
+      end
+    end
+    local function packers(pass)
+      if pass==1 then
+        return pack_normal,pack_indexed,pack_flat,pack_boolean,pack_mixed
+      else
+        return pack_final,pack_final,pack_final,pack_final,pack_final
+      end
+    end
+    local resources=data.resources
+    local sequences=resources.sequences
+    local sublookups=resources.sublookups
+    local features=resources.features
+    local palettes=resources.colorpalettes
+    local chardata=characters and characters.data
+    local descriptions=data.descriptions or data.glyphs
+    if not descriptions then
+      return
+    end
+    for pass=1,2 do
+      if trace_packing then
+        report_otf("start packing: stage 1, pass %s",pass)
+      end
+      local pack_normal,pack_indexed,pack_flat,pack_boolean,pack_mixed=packers(pass)
+      for unicode,description in next,descriptions do
+        local boundingbox=description.boundingbox
+        if boundingbox then
+          description.boundingbox=pack_indexed(boundingbox)
+        end
+        local math=description.math
+        if math then
+          local kerns=math.kerns
+          if kerns then
+            for tag,kern in next,kerns do
+              kerns[tag]=pack_normal(kern)
+            end
+          end
+        end
+      end
+      local function packthem(sequences)
+        for i=1,#sequences do
+          local sequence=sequences[i]
+          local kind=sequence.type
+          local steps=sequence.steps
+          local order=sequence.order
+          local features=sequence.features
+          local flags=sequence.flags
+          if steps then
+            for i=1,#steps do
+              local step=steps[i]
+              if kind=="gpos_pair" then
+                local c=step.coverage
+                if c then
+                  if step.format=="kern" then
+                    for g1,d1 in next,c do
+                      c[g1]=pack_normal(d1)
+                    end
+                  else
+                    for g1,d1 in next,c do
+                      for g2,d2 in next,d1 do
+                        local f=d2[1] if f then d2[1]=pack_indexed(f) end
+                        local s=d2[2] if s then d2[2]=pack_indexed(s) end
+                      end
+                    end
+                  end
+                end
+              elseif kind=="gpos_single" then
+                local c=step.coverage
+                if c then
+                  if step.format=="kern" then
+                    step.coverage=pack_normal(c)
+                  else
+                    for g1,d1 in next,c do
+                      c[g1]=pack_indexed(d1)
+                    end
+                  end
+                end
+              elseif kind=="gpos_cursive" then
+                local c=step.coverage
+                if c then
+                  for g1,d1 in next,c do
+                    local f=d1[2] if f then d1[2]=pack_indexed(f) end
+                    local s=d1[3] if s then d1[3]=pack_indexed(s) end
+                  end
+                end
+              elseif kind=="gpos_mark2base" or kind=="gpos_mark2mark" then
+                local c=step.baseclasses
+                if c then
+                  for g1,d1 in next,c do
+                    for g2,d2 in next,d1 do
+                      d1[g2]=pack_indexed(d2)
+                    end
+                  end
+                end
+                local c=step.coverage
+                if c then
+                  for g1,d1 in next,c do
+                    d1[2]=pack_indexed(d1[2])
+                  end
+                end
+              elseif kind=="gpos_mark2ligature" then
+                local c=step.baseclasses
+                if c then
+                  for g1,d1 in next,c do
+                    for g2,d2 in next,d1 do
+                      for g3,d3 in next,d2 do
+                        d2[g3]=pack_indexed(d3)
+                      end
+                    end
+                  end
+                end
+                local c=step.coverage
+                if c then
+                  for g1,d1 in next,c do
+                    d1[2]=pack_indexed(d1[2])
+                  end
+                end
+              end
+              local rules=step.rules
+              if rules then
+                for i=1,#rules do
+                  local rule=rules[i]
+                  local r=rule.before    if r then for i=1,#r do r[i]=pack_boolean(r[i]) end end
+                  local r=rule.after    if r then for i=1,#r do r[i]=pack_boolean(r[i]) end end
+                  local r=rule.current   if r then for i=1,#r do r[i]=pack_boolean(r[i]) end end
+                  local r=rule.lookups   if r then rule.lookups=pack_mixed (r)  end
+                  local r=rule.replacements if r then rule.replacements=pack_flat  (r)  end
+                end
+              end
+            end
+          end
+          if order then
+            sequence.order=pack_indexed(order)
+          end
+          if features then
+            for script,feature in next,features do
+              features[script]=pack_normal(feature)
+            end
+          end
+          if flags then
+            sequence.flags=pack_normal(flags)
+          end
+        end
+      end
+      if sequences then
+        packthem(sequences)
+      end
+      if sublookups then
+        packthem(sublookups)
+      end
+      if features then
+        for k,list in next,features do
+          for feature,spec in next,list do
+            list[feature]=pack_normal(spec)
+          end
+        end
+      end
+      if palettes then
+        for i=1,#palettes do
+          local p=palettes[i]
+          for j=1,#p do
+            p[j]=pack_indexed(p[j])
+          end
+        end
+      end
+      if not success(1,pass) then
+        return
+      end
+    end
+    if nt>0 then
+      for pass=1,2 do
+        if trace_packing then
+          report_otf("start packing: stage 2, pass %s",pass)
+        end
+        local pack_normal,pack_indexed,pack_flat,pack_boolean,pack_mixed=packers(pass)
+        for unicode,description in next,descriptions do
+          local math=description.math
+          if math then
+            local kerns=math.kerns
+            if kerns then
+              math.kerns=pack_normal(kerns)
+            end
+          end
+        end
+        local function packthem(sequences)
+          for i=1,#sequences do
+            local sequence=sequences[i]
+            local kind=sequence.type
+            local steps=sequence.steps
+            local features=sequence.features
+            if steps then
+              for i=1,#steps do
+                local step=steps[i]
+                if kind=="gpos_pair" then
+                  local c=step.coverage
+                  if c then
+                    if step.format=="kern" then
+                    else
+                      for g1,d1 in next,c do
+                        for g2,d2 in next,d1 do
+                          d1[g2]=pack_normal(d2)
+                        end
+                      end
+                    end
+                  end
+                end
+                local rules=step.rules
+                if rules then
+                  for i=1,#rules do
+                    local rule=rules[i]
+                    local r=rule.before if r then rule.before=pack_normal(r) end
+                    local r=rule.after  if r then rule.after=pack_normal(r) end
+                    local r=rule.current if r then rule.current=pack_normal(r) end
+                  end
+                end
+              end
+            end
+            if features then
+              sequence.features=pack_normal(features)
+            end
+          end
+        end
+        if sequences then
+          packthem(sequences)
+        end
+        if sublookups then
+          packthem(sublookups)
+        end
+        if not success(2,pass) then
+        end
+      end
+      for pass=1,2 do
+        if trace_packing then
+          report_otf("start packing: stage 3, pass %s",pass)
+        end
+        local pack_normal,pack_indexed,pack_flat,pack_boolean,pack_mixed=packers(pass)
+        local function packthem(sequences)
+          for i=1,#sequences do
+            local sequence=sequences[i]
+            local kind=sequence.type
+            local steps=sequence.steps
+            local features=sequence.features
+            if steps then
+              for i=1,#steps do
+                local step=steps[i]
+                if kind=="gpos_pair" then
+                  local c=step.coverage
+                  if c then
+                    if step.format=="kern" then
+                    else
+                      for g1,d1 in next,c do
+                        c[g1]=pack_normal(d1)
+                      end
+                    end
+                  end
+                end
+              end
+            end
+          end
+        end
+        if sequences then
+          packthem(sequences)
+        end
+        if sublookups then
+          packthem(sublookups)
+        end
+      end
+    end
+  end
+end
+local unpacked_mt={
+  __index=function(t,k)
+      t[k]=false
+      return k 
+    end
+}
+function readers.unpack(data)
+  if data then
+    local tables=data.tables
+    if tables then
+      local resources=data.resources
+      local descriptions=data.descriptions or data.glyphs
+      local sequences=resources.sequences
+      local sublookups=resources.sublookups
+      local features=resources.features
+      local palettes=resources.colorpalettes
+      local unpacked={}
+      setmetatable(unpacked,unpacked_mt)
+      for unicode,description in next,descriptions do
+        local tv=tables[description.boundingbox]
+        if tv then
+          description.boundingbox=tv
+        end
+        local math=description.math
+        if math then
+          local kerns=math.kerns
+          if kerns then
+            local tm=tables[kerns]
+            if tm then
+              math.kerns=tm
+              kerns=unpacked[tm]
+            end
+            if kerns then
+              for k,kern in next,kerns do
+                local tv=tables[kern]
+                if tv then
+                  kerns[k]=tv
+                end
+              end
+            end
+          end
+        end
+      end
+      local function unpackthem(sequences)
+        for i=1,#sequences do
+          local sequence=sequences[i]
+          local kind=sequence.type
+          local steps=sequence.steps
+          local order=sequence.order
+          local features=sequence.features
+          local flags=sequence.flags
+          local markclass=sequence.markclass
+          if steps then
+            for i=1,#steps do
+              local step=steps[i]
+              if kind=="gpos_pair" then
+                local c=step.coverage
+                if c then
+                  if step.format=="kern" then
+                    for g1,d1 in next,c do
+                      local tv=tables[d1]
+                      if tv then
+                        c[g1]=tv
+                      end
+                    end
+                  else
+                    for g1,d1 in next,c do
+                      local tv=tables[d1]
+                      if tv then
+                        c[g1]=tv
+                        d1=tv
+                      end
+                      for g2,d2 in next,d1 do
+                        local tv=tables[d2]
+                        if tv then
+                          d1[g2]=tv
+                          d2=tv
+                        end
+                        local f=tables[d2[1]] if f then d2[1]=f end
+                        local s=tables[d2[2]] if s then d2[2]=s end
+                      end
+                    end
+                  end
+                end
+              elseif kind=="gpos_single" then
+                local c=step.coverage
+                if c then
+                  if step.format=="kern" then
+                    local tv=tables[c]
+                    if tv then
+                      step.coverage=tv
+                    end
+                  else
+                    for g1,d1 in next,c do
+                      local tv=tables[d1]
+                      if tv then
+                        c[g1]=tv
+                      end
+                    end
+                  end
+                end
+              elseif kind=="gpos_cursive" then
+                local c=step.coverage
+                if c then
+                  for g1,d1 in next,c do
+                    local f=tables[d1[2]] if f then d1[2]=f end
+                    local s=tables[d1[3]] if s then d1[3]=s end
+                  end
+                end
+              elseif kind=="gpos_mark2base" or kind=="gpos_mark2mark" then
+                local c=step.baseclasses
+                if c then
+                  for g1,d1 in next,c do
+                    for g2,d2 in next,d1 do
+                      local tv=tables[d2]
+                      if tv then
+                        d1[g2]=tv
+                      end
+                    end
+                  end
+                end
+                local c=step.coverage
+                if c then
+                  for g1,d1 in next,c do
+                    local tv=tables[d1[2]]
+                    if tv then
+                      d1[2]=tv
+                    end
+                  end
+                end
+              elseif kind=="gpos_mark2ligature" then
+                local c=step.baseclasses
+                if c then
+                  for g1,d1 in next,c do
+                    for g2,d2 in next,d1 do
+                      for g3,d3 in next,d2 do
+                        local tv=tables[d2[g3]]
+                        if tv then
+                          d2[g3]=tv
+                        end
+                      end
+                    end
+                  end
+                end
+                local c=step.coverage
+                if c then
+                  for g1,d1 in next,c do
+                    local tv=tables[d1[2]]
+                    if tv then
+                      d1[2]=tv
+                    end
+                  end
+                end
+              end
+              local rules=step.rules
+              if rules then
+                for i=1,#rules do
+                  local rule=rules[i]
+                  local before=rule.before
+                  if before then
+                    local tv=tables[before]
+                    if tv then
+                      rule.before=tv
+                      before=tv
+                    end
+                    for i=1,#before do
+                      local tv=tables[before[i]]
+                      if tv then
+                        before[i]=tv
+                      end
+                    end
+                  end
+                  local after=rule.after
+                  if after then
+                    local tv=tables[after]
+                    if tv then
+                      rule.after=tv
+                      after=tv
+                    end
+                    for i=1,#after do
+                      local tv=tables[after[i]]
+                      if tv then
+                        after[i]=tv
+                      end
+                    end
+                  end
+                  local current=rule.current
+                  if current then
+                    local tv=tables[current]
+                    if tv then
+                      rule.current=tv
+                      current=tv
+                    end
+                    for i=1,#current do
+                      local tv=tables[current[i]]
+                      if tv then
+                        current[i]=tv
+                      end
+                    end
+                  end
+                  local lookups=rule.lookups
+                  if lookups then
+                    local tv=tables[lookups]
+                    if tv then
+                      rule.lookups=tv
+                    end
+                  end
+                  local replacements=rule.replacements
+                  if replacements then
+                    local tv=tables[replacements]
+                    if tv then
+                      rule.replacements=tv
+                    end
+                  end
+                end
+              end
+            end
+          end
+          if features then
+            local tv=tables[features]
+            if tv then
+              sequence.features=tv
+              features=tv
+            end
+            for script,feature in next,features do
+              local tv=tables[feature]
+              if tv then
+                features[script]=tv
+              end
+            end
+          end
+          if order then
+            local tv=tables[order]
+            if tv then
+              sequence.order=tv
+            end
+          end
+          if flags then
+            local tv=tables[flags]
+            if tv then
+              sequence.flags=tv
+            end
+          end
+        end
+      end
+      if sequences then
+        unpackthem(sequences)
+      end
+      if sublookups then
+        unpackthem(sublookups)
+      end
+      if features then
+        for k,list in next,features do
+          for feature,spec in next,list do
+            local tv=tables[spec]
+            if tv then
+              list[feature]=tv
+            end
+          end
+        end
+      end
+      if palettes then
+        for i=1,#palettes do
+          local p=palettes[i]
+          for j=1,#p do
+            local tv=tables[p[j]]
+            if tv then
+              p[j]=tv
+            end
+          end
+        end
+      end
+      data.tables=nil
+    end
+  end
+end
+local mt={
+  __index=function(t,k) 
+    if k=="height" then
+      local ht=t.boundingbox[4]
+      return ht<0 and 0 or ht
+    elseif k=="depth" then
+      local dp=-t.boundingbox[2]
+      return dp<0 and 0 or dp
+    elseif k=="width" then
+      return 0
+    elseif k=="name" then 
+      return forcenotdef and ".notdef"
+    end
+  end
+}
+local function sameformat(sequence,steps,first,nofsteps,kind)
+  return true
+end
+local function mergesteps_1(lookup,strict)
+  local steps=lookup.steps
+  local nofsteps=lookup.nofsteps
+  local first=steps[1]
+  if strict then
+    local f=first.format
+    for i=2,nofsteps do
+      if steps[i].format~=f then
+        report("not merging %a steps of %a lookup %a, different formats",nofsteps,lookup.type,lookup.name)
+        return 0
+      end
+    end
+  end
+  report("merging %a steps of %a lookup %a",nofsteps,lookup.type,lookup.name)
+  local target=first.coverage
+  for i=2,nofsteps do
+    for k,v in next,steps[i].coverage do
+      if not target[k] then
+        target[k]=v
+      end
+    end
+  end
+  lookup.nofsteps=1
+  lookup.merged=true
+  lookup.steps={ first }
+  return nofsteps-1
+end
+local function mergesteps_2(lookup,strict) 
+  local steps=lookup.steps
+  local nofsteps=lookup.nofsteps
+  local first=steps[1]
+  if strict then
+    local f=first.format
+    for i=2,nofsteps do
+      if steps[i].format~=f then
+        report("not merging %a steps of %a lookup %a, different formats",nofsteps,lookup.type,lookup.name)
+        return 0
+      end
+    end
+  end
+  report("merging %a steps of %a lookup %a",nofsteps,lookup.type,lookup.name)
+  local target=first.coverage
+  for i=2,nofsteps do
+    for k,v in next,steps[i].coverage do
+      local tk=target[k]
+      if tk then
+        for k,v in next,v do
+          if not tk[k] then
+            tk[k]=v
+          end
+        end
+      else
+        target[k]=v
+      end
+    end
+  end
+  lookup.nofsteps=1
+  lookup.steps={ first }
+  return nofsteps-1
+end
+local function mergesteps_3(lookup,strict) 
+  local steps=lookup.steps
+  local nofsteps=lookup.nofsteps
+  local first=steps[1]
+  report("merging %a steps of %a lookup %a",nofsteps,lookup.type,lookup.name)
+  local baseclasses={}
+  local coverage={}
+  local used={}
+  for i=1,nofsteps do
+    local offset=i*10
+    local step=steps[i]
+    for k,v in sortedhash(step.baseclasses) do
+      baseclasses[offset+k]=v
+    end
+    for k,v in next,step.coverage do
+      local tk=coverage[k]
+      if tk then
+        for k,v in next,v do
+          if not tk[k] then
+            tk[k]=v
+            local c=offset+v[1]
+            v[1]=c
+            if not used[c] then
+              used[c]=true
+            end
+          end
+        end
+      else
+        coverage[k]=v
+        local c=offset+v[1]
+        v[1]=c
+        if not used[c] then
+          used[c]=true
+        end
+      end
+    end
+  end
+  for k,v in next,baseclasses do
+    if not used[k] then
+      baseclasses[k]=nil
+      report("discarding not used baseclass %i",k)
+    end
+  end
+  first.baseclasses=baseclasses
+  first.coverage=coverage
+  lookup.nofsteps=1
+  lookup.steps={ first }
+  return nofsteps-1
+end
+local function nested(old,new)
+  for k,v in next,old do
+    if k=="ligature" then
+      if not new.ligature then
+        new.ligature=v
+      end
+    else
+      local n=new[k]
+      if n then
+        nested(v,n)
+      else
+        new[k]=v
+      end
+    end
+  end
+end
+local function mergesteps_4(lookup) 
+  local steps=lookup.steps
+  local nofsteps=lookup.nofsteps
+  local first=steps[1]
+  report("merging %a steps of %a lookup %a",nofsteps,lookup.type,lookup.name)
+  local target=first.coverage
+  for i=2,nofsteps do
+    for k,v in next,steps[i].coverage do
+      local tk=target[k]
+      if tk then
+        nested(v,tk)
+      else
+        target[k]=v
+      end
+    end
+  end
+  lookup.nofsteps=1
+  lookup.steps={ first }
+  return nofsteps-1
+end
+local function checkkerns(lookup)
+  local steps=lookup.steps
+  local nofsteps=lookup.nofsteps
+  for i=1,nofsteps do
+    local step=steps[i]
+    if step.format=="pair" then
+      local coverage=step.coverage
+      local kerns=true
+      for g1,d1 in next,coverage do
+        if d1[1]~=0 or d1[2]~=0 or d1[4]~=0 then
+          kerns=false
+          break
+        end
+      end
+      if kerns then
+        report("turning pairs of step %a of %a lookup %a into kerns",i,lookup.type,lookup.name)
+        for g1,d1 in next,coverage do
+          coverage[g1]=d1[3]
+        end
+        step.format="kern"
+      end
+    end
+  end
+end
+local function checkpairs(lookup)
+  local steps=lookup.steps
+  local nofsteps=lookup.nofsteps
+  local kerned=0
+  for i=1,nofsteps do
+    local step=steps[i]
+    if step.format=="pair" then
+      local coverage=step.coverage
+      local kerns=true
+      for g1,d1 in next,coverage do
+        for g2,d2 in next,d1 do
+          if d2[2] then
+            kerns=false
+            break
+          else
+            local v=d2[1]
+            if v[1]~=0 or v[2]~=0 or v[4]~=0 then
+              kerns=false
+              break
+            end
+          end
+        end
+      end
+      if kerns then
+        report("turning pairs of step %a of %a lookup %a into kerns",i,lookup.type,lookup.name)
+        for g1,d1 in next,coverage do
+          for g2,d2 in next,d1 do
+            d1[g2]=d2[1][3]
+          end
+        end
+        step.format="kern"
+        kerned=kerned+1
+      end
+    end
+  end
+  return kerned
+end
+function readers.compact(data)
+  if not data or data.compacted then
+    return
+  else
+    data.compacted=true
+  end
+  local resources=data.resources
+  local merged=0
+  local kerned=0
+  local allsteps=0
+  local function compact(what)
+    local lookups=resources[what]
+    if lookups then
+      for i=1,#lookups do
+        local lookup=lookups[i]
+        local nofsteps=lookup.nofsteps
+        allsteps=allsteps+nofsteps
+        if nofsteps>1 then
+          local kind=lookup.type
+          if kind=="gsub_single" or kind=="gsub_alternate" or kind=="gsub_multiple" then
+            merged=merged+mergesteps_1(lookup)
+          elseif kind=="gsub_ligature" then
+            merged=merged+mergesteps_4(lookup)
+          elseif kind=="gpos_single" then
+            merged=merged+mergesteps_1(lookup,true)
+            checkkerns(lookup)
+          elseif kind=="gpos_pair" then
+            merged=merged+mergesteps_2(lookup,true)
+            kerned=kerned+checkpairs(lookup)
+          elseif kind=="gpos_cursive" then
+            merged=merged+mergesteps_2(lookup)
+          elseif kind=="gpos_mark2mark" or kind=="gpos_mark2base" or kind=="gpos_mark2ligature" then
+            merged=merged+mergesteps_3(lookup)
+          end
+        end
+      end
+    else
+      report("no lookups in %a",what)
+    end
+  end
+  compact("sequences")
+  compact("sublookups")
+  if merged>0 then
+    report("%i steps of %i removed due to merging",merged,allsteps)
+  end
+  if kerned>0 then
+    report("%i steps of %i steps turned from pairs into kerns",kerned,allsteps)
+  end
+end
+function readers.expand(data)
+  if not data or data.expanded then
+    return
+  else
+    data.expanded=true
+  end
+  local resources=data.resources
+  local sublookups=resources.sublookups
+  local sequences=resources.sequences 
+  local markclasses=resources.markclasses
+  local descriptions=data.descriptions
+  if descriptions then
+    local defaultwidth=resources.defaultwidth or 0
+    local defaultheight=resources.defaultheight or 0
+    local defaultdepth=resources.defaultdepth or 0
+    local basename=trace_markwidth and file.basename(resources.filename)
+    for u,d in next,descriptions do
+      local bb=d.boundingbox
+      local wd=d.width
+      if not wd then
+        d.width=defaultwidth
+      elseif trace_markwidth and wd~=0 and d.class=="mark" then
+        report("mark %a with width %b found in %a",d.name or "<noname>",wd,basename)
+      end
+      if bb then
+        local ht=bb[4]
+        local dp=-bb[2]
+        if ht==0 or ht<0 then
+        else
+          d.height=ht
+        end
+        if dp==0 or dp<0 then
+        else
+          d.depth=dp
+        end
+      end
+    end
+  end
+  local function expandlookups(sequences)
+    if sequences then
+      for i=1,#sequences do
+        local sequence=sequences[i]
+        local steps=sequence.steps
+        if steps then
+          local kind=sequence.type
+          local markclass=sequence.markclass
+          if markclass then
+            if not markclasses then
+              report_warning("missing markclasses")
+              sequence.markclass=false
+            else
+              sequence.markclass=markclasses[markclass]
+            end
+          end
+          for i=1,sequence.nofsteps do
+            local step=steps[i]
+            local baseclasses=step.baseclasses
+            if baseclasses then
+              local coverage=step.coverage
+              for k,v in next,coverage do
+                v[1]=baseclasses[v[1]] 
+              end
+            elseif kind=="gpos_cursive" then
+              local coverage=step.coverage
+              for k,v in next,coverage do
+                v[1]=coverage 
+              end
+            end
+            local rules=step.rules
+            if rules then
+              local rulehash={}
+              local rulesize=0
+              local coverage={}
+              local lookuptype=sequence.type
+              step.coverage=coverage 
+              for nofrules=1,#rules do
+                local rule=rules[nofrules]
+                local current=rule.current
+                local before=rule.before
+                local after=rule.after
+                local replacements=rule.replacements or false
+                local sequence={}
+                local nofsequences=0
+                if before then
+                  for n=1,#before do
+                    nofsequences=nofsequences+1
+                    sequence[nofsequences]=before[n]
+                  end
+                end
+                local start=nofsequences+1
+                for n=1,#current do
+                  nofsequences=nofsequences+1
+                  sequence[nofsequences]=current[n]
+                end
+                local stop=nofsequences
+                if after then
+                  for n=1,#after do
+                    nofsequences=nofsequences+1
+                    sequence[nofsequences]=after[n]
+                  end
+                end
+                local lookups=rule.lookups or false
+                local subtype=nil
+                if lookups then
+                  for k,v in next,lookups do
+                    local lookup=sublookups[v]
+                    if lookup then
+                      lookups[k]=lookup
+                      if not subtype then
+                        subtype=lookup.type
+                      end
+                    else
+                    end
+                  end
+                end
+                if sequence[1] then 
+                  rulesize=rulesize+1
+                  rulehash[rulesize]={
+                    nofrules,
+                    lookuptype,
+                    sequence,
+                    start,
+                    stop,
+                    lookups,
+                    replacements,
+                    subtype,
+                  }
+                  for unic in next,sequence[start] do
+                    local cu=coverage[unic]
+                    if not cu then
+                      coverage[unic]=rulehash 
+                    end
+                  end
+                end
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+  expandlookups(sequences)
+  expandlookups(sublookups)
+end
+
+end --- [luaotfload, fontloader-2017-02-11.lua scope for “font-oup”] ---
+
+
+do  --- [luaotfload, fontloader-2017-02-11.lua scope for “font-otl” 2e7c8d9a331c46826211bd507f8e488a] ---
+
+if not modules then modules={} end modules ['font-otl']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files",
+}
+local gmatch,find,match,lower,strip=string.gmatch,string.find,string.match,string.lower,string.strip
+local type,next,tonumber,tostring,unpack=type,next,tonumber,tostring,unpack
+local abs=math.abs
+local derivetable=table.derive
+local formatters=string.formatters
+local setmetatableindex=table.setmetatableindex
+local allocate=utilities.storage.allocate
+local registertracker=trackers.register
+local registerdirective=directives.register
+local starttiming=statistics.starttiming
+local stoptiming=statistics.stoptiming
+local elapsedtime=statistics.elapsedtime
+local findbinfile=resolvers.findbinfile
+local trace_loading=false registertracker("otf.loading",function(v) trace_loading=v end)
+local trace_features=false registertracker("otf.features",function(v) trace_features=v end)
+local trace_defining=false registertracker("fonts.defining",function(v) trace_defining=v end)
+local report_otf=logs.reporter("fonts","otf loading")
+local fonts=fonts
+local otf=fonts.handlers.otf
+otf.version=3.027 
+otf.cache=containers.define("fonts","otl",otf.version,true)
+otf.svgcache=containers.define("fonts","svg",otf.version,true)
+otf.pdfcache=containers.define("fonts","pdf",otf.version,true)
+otf.svgenabled=false
+local otfreaders=otf.readers
+local hashes=fonts.hashes
+local definers=fonts.definers
+local readers=fonts.readers
+local constructors=fonts.constructors
+local otffeatures=constructors.features.otf
+local registerotffeature=otffeatures.register
+local otfenhancers=constructors.enhancers.otf
+local registerotfenhancer=otfenhancers.register
+local forceload=false
+local cleanup=0   
+local syncspace=true
+local forcenotdef=false
+local applyruntimefixes=fonts.treatments and fonts.treatments.applyfixes
+local wildcard="*"
+local default="dflt"
+local formats=fonts.formats
+formats.otf="opentype"
+formats.ttf="truetype"
+formats.ttc="truetype"
+registerdirective("fonts.otf.loader.cleanup",function(v) cleanup=tonumber(v) or (v and 1) or 0 end)
+registerdirective("fonts.otf.loader.force",function(v) forceload=v end)
+registerdirective("fonts.otf.loader.syncspace",function(v) syncspace=v end)
+registerdirective("fonts.otf.loader.forcenotdef",function(v) forcenotdef=v end)
+registerotfenhancer("check extra features",function() end) 
+function otf.load(filename,sub,featurefile)
+  local featurefile=nil
+  local base=file.basename(file.removesuffix(filename))
+  local name=file.removesuffix(base)
+  local attr=lfs.attributes(filename)
+  local size=attr and attr.size or 0
+  local time=attr and attr.modification or 0
+  if featurefile then
+    name=name.."@"..file.removesuffix(file.basename(featurefile))
+  end
+  if sub=="" then
+    sub=false
+  end
+  local hash=name
+  if sub then
+    hash=hash.."-"..sub
+  end
+  hash=containers.cleanname(hash)
+  local featurefiles
+  if featurefile then
+    featurefiles={}
+    for s in gmatch(featurefile,"[^,]+") do
+      local name=resolvers.findfile(file.addsuffix(s,'fea'),'fea') or ""
+      if name=="" then
+        report_otf("loading error, no featurefile %a",s)
+      else
+        local attr=lfs.attributes(name)
+        featurefiles[#featurefiles+1]={
+          name=name,
+          size=attr and attr.size or 0,
+          time=attr and attr.modification or 0,
+        }
+      end
+    end
+    if #featurefiles==0 then
+      featurefiles=nil
+    end
+  end
+  local data=containers.read(otf.cache,hash)
+  local reload=not data or data.size~=size or data.time~=time or data.tableversion~=otfreaders.tableversion
+  if forceload then
+    report_otf("forced reload of %a due to hard coded flag",filename)
+    reload=true
+  end
+   if reload then
+    report_otf("loading %a, hash %a",filename,hash)
+    starttiming(otfreaders)
+    data=otfreaders.loadfont(filename,sub or 1)
+    if data then
+      local resources=data.resources
+      local svgshapes=resources.svgshapes
+      if svgshapes then
+        resources.svgshapes=nil
+        if otf.svgenabled then
+          local timestamp=os.date()
+          containers.write(otf.svgcache,hash,{
+            svgshapes=svgshapes,
+            timestamp=timestamp,
+          })
+          data.properties.svg={
+            hash=hash,
+            timestamp=timestamp,
+          }
+        end
+      end
+      otfreaders.compact(data)
+      otfreaders.rehash(data,"unicodes")
+      otfreaders.addunicodetable(data)
+      otfreaders.extend(data)
+      otfreaders.pack(data)
+      report_otf("loading done")
+      report_otf("saving %a in cache",filename)
+      data=containers.write(otf.cache,hash,data)
+      if cleanup>1 then
+        collectgarbage("collect")
+      end
+      stoptiming(otfreaders)
+      if elapsedtime then
+        report_otf("loading, optimizing, packing and caching time %s",elapsedtime(otfreaders))
+      end
+      if cleanup>3 then
+        collectgarbage("collect")
+      end
+      data=containers.read(otf.cache,hash) 
+      if cleanup>2 then
+        collectgarbage("collect")
+      end
+    else
+      data=nil
+      report_otf("loading failed due to read error")
+    end
+  end
+  if data then
+    if trace_defining then
+      report_otf("loading from cache using hash %a",hash)
+    end
+    otfreaders.unpack(data)
+    otfreaders.expand(data) 
+    otfreaders.addunicodetable(data)
+    otfenhancers.apply(data,filename,data)
+    if applyruntimefixes then
+      applyruntimefixes(filename,data)
+    end
+    data.metadata.math=data.resources.mathconstants
+  end
+  return data
+end
+function otf.setfeatures(tfmdata,features)
+  local okay=constructors.initializefeatures("otf",tfmdata,features,trace_features,report_otf)
+  if okay then
+    return constructors.collectprocessors("otf",tfmdata,features,trace_features,report_otf)
+  else
+    return {} 
+  end
+end
+local function copytotfm(data,cache_id)
+  if data then
+    local metadata=data.metadata
+    local properties=derivetable(data.properties)
+    local descriptions=derivetable(data.descriptions)
+    local goodies=derivetable(data.goodies)
+    local characters={}
+    local parameters={}
+    local mathparameters={}
+    local resources=data.resources
+    local unicodes=resources.unicodes
+    local spaceunits=500
+    local spacer="space"
+    local designsize=metadata.designsize or 100
+    local minsize=metadata.minsize or designsize
+    local maxsize=metadata.maxsize or designsize
+    local mathspecs=metadata.math
+    if designsize==0 then
+      designsize=100
+      minsize=100
+      maxsize=100
+    end
+    if mathspecs then
+      for name,value in next,mathspecs do
+        mathparameters[name]=value
+      end
+    end
+    for unicode in next,data.descriptions do 
+      characters[unicode]={}
+    end
+    if mathspecs then
+      for unicode,character in next,characters do
+        local d=descriptions[unicode]
+        local m=d.math
+        if m then
+          local italic=m.italic
+          local vitalic=m.vitalic
+          local variants=m.hvariants
+          local parts=m.hparts
+          if variants then
+            local c=character
+            for i=1,#variants do
+              local un=variants[i]
+              c.next=un
+              c=characters[un]
+            end 
+            c.horiz_variants=parts
+          elseif parts then
+            character.horiz_variants=parts
+            italic=m.hitalic
+          end
+          local variants=m.vvariants
+          local parts=m.vparts
+          if variants then
+            local c=character
+            for i=1,#variants do
+              local un=variants[i]
+              c.next=un
+              c=characters[un]
+            end 
+            c.vert_variants=parts
+          elseif parts then
+            character.vert_variants=parts
+          end
+          if italic and italic~=0 then
+            character.italic=italic
+          end
+          if vitalic and vitalic~=0 then
+            character.vert_italic=vitalic
+          end
+          local accent=m.accent 
+          if accent then
+            character.accent=accent
+          end
+          local kerns=m.kerns
+          if kerns then
+            character.mathkerns=kerns
+          end
+        end
+      end
+    end
+    local filename=constructors.checkedfilename(resources)
+    local fontname=metadata.fontname
+    local fullname=metadata.fullname or fontname
+    local psname=fontname or fullname
+    local units=metadata.units or 1000
+    if units==0 then 
+      units=1000 
+      metadata.units=1000
+      report_otf("changing %a units to %a",0,units)
+    end
+    local monospaced=metadata.monospaced
+    local charwidth=metadata.averagewidth 
+    local charxheight=metadata.xheight 
+    local italicangle=metadata.italicangle
+    local hasitalics=metadata.hasitalics
+    properties.monospaced=monospaced
+    properties.hasitalics=hasitalics
+    parameters.italicangle=italicangle
+    parameters.charwidth=charwidth
+    parameters.charxheight=charxheight
+    local space=0x0020
+    local emdash=0x2014
+    if monospaced then
+      if descriptions[space] then
+        spaceunits,spacer=descriptions[space].width,"space"
+      end
+      if not spaceunits and descriptions[emdash] then
+        spaceunits,spacer=descriptions[emdash].width,"emdash"
+      end
+      if not spaceunits and charwidth then
+        spaceunits,spacer=charwidth,"charwidth"
+      end
+    else
+      if descriptions[space] then
+        spaceunits,spacer=descriptions[space].width,"space"
+      end
+      if not spaceunits and descriptions[emdash] then
+        spaceunits,spacer=descriptions[emdash].width/2,"emdash/2"
+      end
+      if not spaceunits and charwidth then
+        spaceunits,spacer=charwidth,"charwidth"
+      end
+    end
+    spaceunits=tonumber(spaceunits) or units/2
+    parameters.slant=0
+    parameters.space=spaceunits      
+    parameters.space_stretch=1*units/2  
+    parameters.space_shrink=1*units/3  
+    parameters.x_height=2*units/5  
+    parameters.quad=units    
+    if spaceunits<2*units/5 then
+    end
+    if italicangle and italicangle~=0 then
+      parameters.italicangle=italicangle
+      parameters.italicfactor=math.cos(math.rad(90+italicangle))
+      parameters.slant=- math.tan(italicangle*math.pi/180)
+    end
+    if monospaced then
+      parameters.space_stretch=0
+      parameters.space_shrink=0
+    elseif syncspace then 
+      parameters.space_stretch=spaceunits/2
+      parameters.space_shrink=spaceunits/3
+    end
+    parameters.extra_space=parameters.space_shrink 
+    if charxheight then
+      parameters.x_height=charxheight
+    else
+      local x=0x0078
+      if x then
+        local x=descriptions[x]
+        if x then
+          parameters.x_height=x.height
+        end
+      end
+    end
+    parameters.designsize=(designsize/10)*65536
+    parameters.minsize=(minsize/10)*65536
+    parameters.maxsize=(maxsize/10)*65536
+    parameters.ascender=abs(metadata.ascender or 0)
+    parameters.descender=abs(metadata.descender or 0)
+    parameters.units=units
+    properties.space=spacer
+    properties.encodingbytes=2
+    properties.format=data.format or formats.otf
+    properties.noglyphnames=true
+    properties.filename=filename
+    properties.fontname=fontname
+    properties.fullname=fullname
+    properties.psname=psname
+    properties.name=filename or fullname
+    return {
+      characters=characters,
+      descriptions=descriptions,
+      parameters=parameters,
+      mathparameters=mathparameters,
+      resources=resources,
+      properties=properties,
+      goodies=goodies,
+    }
+  end
+end
+local converters={
+  woff={
+    cachename="webfonts",
+    action=otf.readers.woff2otf,
+  }
+}
+local function checkconversion(specification)
+  local filename=specification.filename
+  local converter=converters[lower(file.suffix(filename))]
+  if converter then
+    local base=file.basename(filename)
+    local name=file.removesuffix(base)
+    local attr=lfs.attributes(filename)
+    local size=attr and attr.size or 0
+    local time=attr and attr.modification or 0
+    if size>0 then
+      local cleanname=containers.cleanname(name)
+      local cachename=caches.setfirstwritablefile(cleanname,converter.cachename)
+      if not io.exists(cachename) or (time~=lfs.attributes(cachename).modification) then
+        report_otf("caching font %a in %a",filename,cachename)
+        converter.action(filename,cachename) 
+        lfs.touch(cachename,time,time)
+      end
+      specification.filename=cachename
+    end
+  end
+end
+local function otftotfm(specification)
+  local cache_id=specification.hash
+  local tfmdata=containers.read(constructors.cache,cache_id)
+  if not tfmdata then
+    checkconversion(specification) 
+    local name=specification.name
+    local sub=specification.sub
+    local subindex=specification.subindex
+    local filename=specification.filename
+    local features=specification.features.normal
+    local rawdata=otf.load(filename,sub,features and features.featurefile)
+    if rawdata and next(rawdata) then
+      local descriptions=rawdata.descriptions
+      rawdata.lookuphash={} 
+      tfmdata=copytotfm(rawdata,cache_id)
+      if tfmdata and next(tfmdata) then
+        local features=constructors.checkedfeatures("otf",features)
+        local shared=tfmdata.shared
+        if not shared then
+          shared={}
+          tfmdata.shared=shared
+        end
+        shared.rawdata=rawdata
+        shared.dynamics={}
+        tfmdata.changed={}
+        shared.features=features
+        shared.processes=otf.setfeatures(tfmdata,features)
+      end
+    end
+    containers.write(constructors.cache,cache_id,tfmdata)
+  end
+  return tfmdata
+end
+local function read_from_otf(specification)
+  local tfmdata=otftotfm(specification)
+  if tfmdata then
+    tfmdata.properties.name=specification.name
+    tfmdata.properties.sub=specification.sub
+    tfmdata=constructors.scale(tfmdata,specification)
+    local allfeatures=tfmdata.shared.features or specification.features.normal
+    constructors.applymanipulators("otf",tfmdata,allfeatures,trace_features,report_otf)
+    constructors.setname(tfmdata,specification) 
+    fonts.loggers.register(tfmdata,file.suffix(specification.filename),specification)
+  end
+  return tfmdata
+end
+local function checkmathsize(tfmdata,mathsize)
+  local mathdata=tfmdata.shared.rawdata.metadata.math
+  local mathsize=tonumber(mathsize)
+  if mathdata then 
+    local parameters=tfmdata.parameters
+    parameters.scriptpercentage=mathdata.ScriptPercentScaleDown
+    parameters.scriptscriptpercentage=mathdata.ScriptScriptPercentScaleDown
+    parameters.mathsize=mathsize
+  end
+end
+registerotffeature {
+  name="mathsize",
+  description="apply mathsize specified in the font",
+  initializers={
+    base=checkmathsize,
+    node=checkmathsize,
+  }
+}
+function otf.collectlookups(rawdata,kind,script,language)
+  if not kind then
+    return
+  end
+  if not script then
+    script=default
+  end
+  if not language then
+    language=default
+  end
+  local lookupcache=rawdata.lookupcache
+  if not lookupcache then
+    lookupcache={}
+    rawdata.lookupcache=lookupcache
+  end
+  local kindlookup=lookupcache[kind]
+  if not kindlookup then
+    kindlookup={}
+    lookupcache[kind]=kindlookup
+  end
+  local scriptlookup=kindlookup[script]
+  if not scriptlookup then
+    scriptlookup={}
+    kindlookup[script]=scriptlookup
+  end
+  local languagelookup=scriptlookup[language]
+  if not languagelookup then
+    local sequences=rawdata.resources.sequences
+    local featuremap={}
+    local featurelist={}
+    if sequences then
+      for s=1,#sequences do
+        local sequence=sequences[s]
+        local features=sequence.features
+        if features then
+          features=features[kind]
+          if features then
+            features=features[script] or features[wildcard]
+            if features then
+              features=features[language] or features[wildcard]
+              if features then
+                if not featuremap[sequence] then
+                  featuremap[sequence]=true
+                  featurelist[#featurelist+1]=sequence
+                end
+              end
+            end
+          end
+        end
+      end
+      if #featurelist==0 then
+        featuremap,featurelist=false,false
+      end
+    else
+      featuremap,featurelist=false,false
+    end
+    languagelookup={ featuremap,featurelist }
+    scriptlookup[language]=languagelookup
+  end
+  return unpack(languagelookup)
+end
+local function getgsub(tfmdata,k,kind,value)
+  local shared=tfmdata.shared
+  local rawdata=shared and shared.rawdata
+  if rawdata then
+    local sequences=rawdata.resources.sequences
+    if sequences then
+      local properties=tfmdata.properties
+      local validlookups,lookuplist=otf.collectlookups(rawdata,kind,properties.script,properties.language)
+      if validlookups then
+        for i=1,#lookuplist do
+          local lookup=lookuplist[i]
+          local steps=lookup.steps
+          local nofsteps=lookup.nofsteps
+          for i=1,nofsteps do
+            local coverage=steps[i].coverage
+            if coverage then
+              local found=coverage[k]
+              if found then
+                return found,lookup.type
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+end
+otf.getgsub=getgsub 
+function otf.getsubstitution(tfmdata,k,kind,value)
+  local found,kind=getgsub(tfmdata,k,kind,value)
+  if not found then
+  elseif kind=="gsub_single" then
+    return found
+  elseif kind=="gsub_alternate" then
+    local choice=tonumber(value) or 1 
+    return found[choice] or found[1] or k
+  end
+  return k
+end
+otf.getalternate=otf.getsubstitution
+function otf.getmultiple(tfmdata,k,kind)
+  local found,kind=getgsub(tfmdata,k,kind)
+  if found and kind=="gsub_multiple" then
+    return found
+  end
+  return { k }
+end
+function otf.getkern(tfmdata,left,right,kind)
+  local kerns=getgsub(tfmdata,left,kind or "kern",true) 
+  if kerns then
+    local found=kerns[right]
+    local kind=type(found)
+    if kind=="table" then
+      found=found[1][3] 
+    elseif kind~="number" then
+      found=false
+    end
+    if found then
+      return found*tfmdata.parameters.factor
+    end
+  end
+  return 0
+end
+local function check_otf(forced,specification,suffix)
+  local name=specification.name
+  if forced then
+    name=specification.forcedname 
+  end
+  local fullname=findbinfile(name,suffix) or ""
+  if fullname=="" then
+    fullname=fonts.names.getfilename(name,suffix) or ""
+  end
+  if fullname~="" and not fonts.names.ignoredfile(fullname) then
+    specification.filename=fullname
+    return read_from_otf(specification)
+  end
+end
+local function opentypereader(specification,suffix)
+  local forced=specification.forced or ""
+  if formats[forced] then
+    return check_otf(true,specification,forced)
+  else
+    return check_otf(false,specification,suffix)
+  end
+end
+readers.opentype=opentypereader 
+function readers.otf(specification) return opentypereader(specification,"otf") end
+function readers.ttf(specification) return opentypereader(specification,"ttf") end
+function readers.ttc(specification) return opentypereader(specification,"ttf") end
+function readers.woff(specification)
+  checkconversion(specification)
+  opentypereader(specification,"")
+end
+function otf.scriptandlanguage(tfmdata,attr)
+  local properties=tfmdata.properties
+  return properties.script or "dflt",properties.language or "dflt"
+end
+local function justset(coverage,unicode,replacement)
+  coverage[unicode]=replacement
+end
+otf.coverup={
+  stepkey="steps",
+  actions={
+    chainsubstitution=justset,
+    chainposition=justset,
+    substitution=justset,
+    alternate=justset,
+    multiple=justset,
+    kern=justset,
+    pair=justset,
+    ligature=function(coverage,unicode,ligature)
+      local first=ligature[1]
+      local tree=coverage[first]
+      if not tree then
+        tree={}
+        coverage[first]=tree
+      end
+      for i=2,#ligature do
+        local l=ligature[i]
+        local t=tree[l]
+        if not t then
+          t={}
+          tree[l]=t
+        end
+        tree=t
+      end
+      tree.ligature=unicode
+    end,
+  },
+  register=function(coverage,featuretype,format)
+    return {
+      format=format,
+      coverage=coverage,
+    }
+  end
+}
+
+end --- [luaotfload, fontloader-2017-02-11.lua scope for “font-otl”] ---
+
+
+do  --- [luaotfload, fontloader-2017-02-11.lua scope for “font-oto” 5fbdd899624d4eef639f81b580afe9aa] ---
+
+if not modules then modules = { } end modules ['font-oto'] = { -- original tex
+    version   = 1.001,
+    comment   = "companion to font-ini.mkiv",
+    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+    copyright = "PRAGMA ADE / ConTeXt Development Team",
+    license   = "see context related readme files"
+}
+
+local concat, unpack = table.concat, table.unpack
+local insert, remove = table.insert, table.remove
+local format, gmatch, gsub, find, match, lower, strip = string.format, string.gmatch, string.gsub, string.find, string.match, string.lower, string.strip
+local type, next, tonumber, tostring, rawget = type, next, tonumber, tostring, rawget
+
+local trace_baseinit         = false  trackers.register("otf.baseinit",         function(v) trace_baseinit         = v end)
+local trace_singles          = false  trackers.register("otf.singles",          function(v) trace_singles          = v end)
+local trace_multiples        = false  trackers.register("otf.multiples",        function(v) trace_multiples        = v end)
+local trace_alternatives     = false  trackers.register("otf.alternatives",     function(v) trace_alternatives     = v end)
+local trace_ligatures        = false  trackers.register("otf.ligatures",        function(v) trace_ligatures        = v end)
+----- trace_ligatures_detail = false  trackers.register("otf.ligatures.detail", function(v) trace_ligatures_detail = v end)
+local trace_kerns            = false  trackers.register("otf.kerns",            function(v) trace_kerns            = v end)
+local trace_preparing        = false  trackers.register("otf.preparing",        function(v) trace_preparing        = v end)
+
+local report_prepare         = logs.reporter("fonts","otf prepare")
+
+local fonts                  = fonts
+local otf                    = fonts.handlers.otf
+
+local otffeatures            = otf.features
+local registerotffeature     = otffeatures.register
+
+otf.defaultbasealternate     = "none" -- first last
+
+local wildcard               = "*"
+local default                = "dflt"
+
+local formatters             = string.formatters
+local f_unicode              = formatters["%U"]
+local f_uniname              = formatters["%U (%s)"]
+local f_unilist              = formatters["% t (% t)"]
+
+local function gref(descriptions,n)
+    if type(n) == "number" then
+        local name = descriptions[n].name
+        if name then
+            return f_uniname(n,name)
+        else
+            return f_unicode(n)
+        end
+    elseif n then
+        local num, nam, j = { }, { }, 0
+        for i=1,#n do
+            local ni = n[i]
+            if tonumber(ni) then -- first is likely a key
+                j = j + 1
+                local di = descriptions[ni]
+                num[j] = f_unicode(ni)
+                nam[j] = di and di.name or "-"
+            end
+        end
+        return f_unilist(num,nam)
+    else
+        return "<error in base mode tracing>"
+    end
+end
+
+local function cref(feature,sequence)
+    return formatters["feature %a, type %a, chain lookup %a"](feature,sequence.type,sequence.name)
+end
+
+local function report_substitution(feature,sequence,descriptions,unicode,substitution)
+    if unicode == substitution then
+        report_prepare("%s: base substitution %s maps onto itself",
+            cref(feature,sequence),
+            gref(descriptions,unicode))
+    else
+        report_prepare("%s: base substitution %s => %S",
+            cref(feature,sequence),
+            gref(descriptions,unicode),
+            gref(descriptions,substitution))
+    end
+end
+
+local function report_alternate(feature,sequence,descriptions,unicode,replacement,value,comment)
+    if unicode == replacement then
+        report_prepare("%s: base alternate %s maps onto itself",
+            cref(feature,sequence),
+            gref(descriptions,unicode))
+    else
+        report_prepare("%s: base alternate %s => %s (%S => %S)",
+            cref(feature,sequence),
+            gref(descriptions,unicode),
+            replacement and gref(descriptions,replacement),
+            value,
+            comment)
+    end
+end
+
+local function report_ligature(feature,sequence,descriptions,unicode,ligature)
+    report_prepare("%s: base ligature %s => %S",
+        cref(feature,sequence),
+        gref(descriptions,ligature),
+        gref(descriptions,unicode))
+end
+
+local function report_kern(feature,sequence,descriptions,unicode,otherunicode,value)
+    report_prepare("%s: base kern %s + %s => %S",
+        cref(feature,sequence),
+        gref(descriptions,unicode),
+        gref(descriptions,otherunicode),
+        value)
+end
+
+-- We need to make sure that luatex sees the difference between base fonts that have
+-- different glyphs in the same slots in fonts that have the same fullname (or filename).
+-- LuaTeX will merge fonts eventually (and subset later on). If needed we can use a more
+-- verbose name as long as we don't use <()<>[]{}/%> and the length is < 128.
+
+local basehash, basehashes, applied = { }, 1, { }
+
+local function registerbasehash(tfmdata)
+    local properties = tfmdata.properties
+    local hash = concat(applied," ")
+    local base = basehash[hash]
+    if not base then
+        basehashes     = basehashes + 1
+        base           = basehashes
+        basehash[hash] = base
+    end
+    properties.basehash = base
+    properties.fullname = (properties.fullname or properties.name) .. "-" .. base
+ -- report_prepare("fullname base hash '%a, featureset %a",tfmdata.properties.fullname,hash)
+    applied = { }
+end
+
+local function registerbasefeature(feature,value)
+    applied[#applied+1] = feature  .. "=" .. tostring(value)
+end
+
+-- The original basemode ligature builder used the names of components and did some expression
+-- juggling to get the chain right. The current variant starts with unicodes but still uses
+-- names to make the chain. This is needed because we have to create intermediates when needed
+-- but use predefined snippets when available. To some extend the current builder is more stupid
+-- but I don't worry that much about it as ligatures are rather predicatable.
+--
+-- Personally I think that an ff + i == ffi rule as used in for instance latin modern is pretty
+-- weird as no sane person will key that in and expect a glyph for that ligature plus the following
+-- character. Anyhow, as we need to deal with this, we do, but no guarantes are given.
+--
+--         latin modern       dejavu
+--
+-- f+f       102 102             102 102
+-- f+i       102 105             102 105
+-- f+l       102 108             102 108
+-- f+f+i                         102 102 105
+-- f+f+l     102 102 108         102 102 108
+-- ff+i    64256 105           64256 105
+-- ff+l                        64256 108
+--
+-- As you can see here, latin modern is less complete than dejavu but
+-- in practice one will not notice it.
+--
+-- The while loop is needed because we need to resolve for instance pseudo names like
+-- hyphen_hyphen to endash so in practice we end up with a bit too many definitions but the
+-- overhead is neglectable. We can have changed[first] or changed[second] but it quickly becomes
+-- messy if we need to take that into account.
+
+local function makefake(tfmdata,name,present)
+    local resources = tfmdata.resources
+    local private   = resources.private
+    local character = { intermediate = true, ligatures = { } }
+    resources.unicodes[name] = private
+    tfmdata.characters[private] = character
+    tfmdata.descriptions[private] = { name = name }
+    resources.private = private + 1
+    present[name] = private
+    return character
+end
+
+local function make_1(present,tree,name)
+    for k, v in next, tree do
+        if k == "ligature" then
+            present[name] = v
+        else
+            make_1(present,v,name .. "_" .. k)
+        end
+    end
+end
+
+local function make_2(present,tfmdata,characters,tree,name,preceding,unicode,done)
+    for k, v in next, tree do
+        if k == "ligature" then
+            local character = characters[preceding]
+            if not character then
+                if trace_baseinit then
+                    report_prepare("weird ligature in lookup %a, current %C, preceding %C",sequence.name,v,preceding)
+                end
+                character = makefake(tfmdata,name,present)
+            end
+            local ligatures = character.ligatures
+            if ligatures then
+                ligatures[unicode] = { char = v }
+            else
+                character.ligatures = { [unicode] = { char = v } }
+            end
+            if done then
+                local d = done[name]
+                if not d then
+                    done[name] = { "dummy", v }
+                else
+                    d[#d+1] = v
+                end
+            end
+        else
+            local code = present[name] or unicode
+            local name = name .. "_" .. k
+            make_2(present,tfmdata,characters,v,name,code,k,done)
+        end
+    end
+end
+
+local function preparesubstitutions(tfmdata,feature,value,validlookups,lookuplist)
+    local characters   = tfmdata.characters
+    local descriptions = tfmdata.descriptions
+    local resources    = tfmdata.resources
+    local changed      = tfmdata.changed
+
+    local ligatures    = { }
+    local alternate    = tonumber(value) or true and 1
+    local defaultalt   = otf.defaultbasealternate
+
+    local trace_singles      = trace_baseinit and trace_singles
+    local trace_alternatives = trace_baseinit and trace_alternatives
+    local trace_ligatures    = trace_baseinit and trace_ligatures
+
+    -- A chain of changes is handled in font-con which is clesner because
+    -- we can have shared changes and such.
+
+    if not changed then
+        changed = { }
+        tfmdata.changed = changed
+    end
+
+    for i=1,#lookuplist do
+        local sequence = lookuplist[i]
+        local steps    = sequence.steps
+        local kind     = sequence.type
+        if kind == "gsub_single" then
+            for i=1,#steps do
+                for unicode, data in next, steps[i].coverage do
+                    if unicode ~= data then
+                        changed[unicode] = data
+                    end
+                    if trace_singles then
+                        report_substitution(feature,sequence,descriptions,unicode,data)
+                    end
+                end
+            end
+        elseif kind == "gsub_alternate" then
+            for i=1,#steps do
+                for unicode, data in next, steps[i].coverage do
+                    local replacement = data[alternate]
+                    if replacement then
+                        if unicode ~= replacement then
+                            changed[unicode] = replacement
+                        end
+                        if trace_alternatives then
+                            report_alternate(feature,sequence,descriptions,unicode,replacement,value,"normal")
+                        end
+                    elseif defaultalt == "first" then
+                        replacement = data[1]
+                        if unicode ~= replacement then
+                            changed[unicode] = replacement
+                        end
+                        if trace_alternatives then
+                            report_alternate(feature,sequence,descriptions,unicode,replacement,value,defaultalt)
+                        end
+                    elseif defaultalt == "last" then
+                        replacement = data[#data]
+                        if unicode ~= replacement then
+                            changed[unicode] = replacement
+                        end
+                        if trace_alternatives then
+                            report_alternate(feature,sequence,descriptions,unicode,replacement,value,defaultalt)
+                        end
+                    else
+                        if trace_alternatives then
+                            report_alternate(feature,sequence,descriptions,unicode,replacement,value,"unknown")
+                        end
+                    end
+                end
+            end
+        elseif kind == "gsub_ligature" then
+            for i=1,#steps do
+                for unicode, data in next, steps[i].coverage do
+                    ligatures[#ligatures+1] = { unicode, data, "" } -- lookupname }
+                    if trace_ligatures then
+                        report_ligature(feature,sequence,descriptions,unicode,data)
+                    end
+                end
+            end
+        end
+    end
+
+    local nofligatures = #ligatures
+
+    if nofligatures > 0 then
+
+        local characters = tfmdata.characters
+        local present    = { }
+        local done       = trace_baseinit and trace_ligatures and { }
+
+        for i=1,nofligatures do
+            local ligature = ligatures[i]
+            local unicode, tree = ligature[1], ligature[2]
+            make_1(present,tree,"ctx_"..unicode)
+        end
+
+        for i=1,nofligatures do
+            local ligature = ligatures[i]
+            local unicode, tree, lookupname = ligature[1], ligature[2], ligature[3]
+            make_2(present,tfmdata,characters,tree,"ctx_"..unicode,unicode,unicode,done,sequence)
+        end
+
+    end
+
+end
+
+local function preparepositionings(tfmdata,feature,value,validlookups,lookuplist)
+    local characters   = tfmdata.characters
+    local descriptions = tfmdata.descriptions
+    local resources    = tfmdata.resources
+    local properties   = tfmdata.properties
+    local traceindeed  = trace_baseinit and trace_kerns
+    -- check out this sharedkerns trickery
+    for i=1,#lookuplist do
+        local sequence = lookuplist[i]
+        local steps    = sequence.steps
+        local kind     = sequence.type
+        local format   = sequence.format
+        if kind == "gpos_pair" then
+            for i=1,#steps do
+                local step = steps[i]
+                if step.format == "kern" then
+                    for unicode, data in next, steps[i].coverage do
+                        local character = characters[unicode]
+                        local kerns = character.kerns
+                        if not kerns then
+                            kerns = { }
+                            character.kerns = kerns
+                        end
+                        if traceindeed then
+                            for otherunicode, kern in next, data do
+                                if not kerns[otherunicode] and kern ~= 0 then
+                                    kerns[otherunicode] = kern
+                                    report_kern(feature,sequence,descriptions,unicode,otherunicode,kern)
+                                end
+                            end
+                        else
+                            for otherunicode, kern in next, data do
+                                if not kerns[otherunicode] and kern ~= 0 then
+                                    kerns[otherunicode] = kern
+                                end
+                            end
+                        end
+                    end
+                else
+                    for unicode, data in next, steps[i].coverage do
+                        local character = characters[unicode]
+                        local kerns     = character.kerns
+                        for otherunicode, kern in next, data do
+                            if not kern[2] and not (kerns and kerns[otherunicode]) then
+                                local kern = kern[1]
+                                if kern[1] ~= 0 or kern[2] ~= 0 or kern[4] ~= 0 then
+                                    -- a complex pair not suitable for basemode
+                                else
+                                    kern = kern[3]
+                                    if kern ~= 0 then
+                                        if kerns then
+                                            kerns[otherunicode] = kern
+                                        else
+                                            kerns = { [otherunicode] = kern }
+                                            character.kerns = kerns
+                                        end
+                                        if traceindeed then
+                                            report_kern(feature,sequence,descriptions,unicode,otherunicode,kern)
+                                        end
+                                    end
+                                end
+                            end
+                        end
+                    end
+                end
+            end
+        end
+    end
+
+end
+
+local function initializehashes(tfmdata)
+    -- already done
+end
+
+local function checkmathreplacements(tfmdata,fullname)
+    if tfmdata.mathparameters then
+        local characters = tfmdata.characters
+        local changed    = tfmdata.changed
+        if next(changed) then
+            if trace_preparing or trace_baseinit then
+                report_prepare("checking math replacements for %a",fullname)
+            end
+            for unicode, replacement in next, changed do
+                local u = characters[unicode]
+                local r = characters[replacement]
+                local n = u.next
+                local v = u.vert_variants
+                local h = u.horiz_variants
+                if n and not r.next then
+                    if trace_preparing then
+                        report_prepare("forcing %s for %C substituted by %U","incremental step",unicode,replacement)
+                    end
+                    r.next = n
+                end
+                if v and not r.vert_variants then
+                    if trace_preparing then
+                        report_prepare("forcing %s for %C substituted by %U","vertical variants",unicode,replacement)
+                    end
+                    r.vert_variants = v
+                end
+                if h and not r.horiz_variants then
+                    if trace_preparing then
+                        report_prepare("forcing %s for %C substituted by %U","horizontal variants",unicode,replacement)
+                    end
+                    r.horiz_variants = h
+                end
+            end
+        end
+    end
+end
+
+local function featuresinitializer(tfmdata,value)
+    if true then -- value then
+        local starttime = trace_preparing and os.clock()
+        local features  = tfmdata.shared.features
+        local fullname  = tfmdata.properties.fullname or "?"
+        if features then
+            initializehashes(tfmdata)
+            local collectlookups    = otf.collectlookups
+            local rawdata           = tfmdata.shared.rawdata
+            local properties        = tfmdata.properties
+            local script            = properties.script
+            local language          = properties.language
+            local rawresources      = rawdata.resources
+            local rawfeatures       = rawresources and rawresources.features
+            local basesubstitutions = rawfeatures and rawfeatures.gsub
+            local basepositionings  = rawfeatures and rawfeatures.gpos
+            local substitutionsdone = false
+            local positioningsdone  = false
+            --
+            if basesubstitutions or basepositionings then
+                local sequences = tfmdata.resources.sequences
+                for s=1,#sequences do
+                    local sequence = sequences[s]
+                    local sfeatures = sequence.features
+                    if sfeatures then
+                        local order = sequence.order
+                        if order then
+                            for i=1,#order do --
+                                local feature = order[i]
+                                local value = features[feature]
+                                if value then
+                                    local validlookups, lookuplist = collectlookups(rawdata,feature,script,language)
+                                    if not validlookups then
+                                        -- skip
+                                    elseif basesubstitutions and basesubstitutions[feature] then
+                                        if trace_preparing then
+                                            report_prepare("filtering base %s feature %a for %a with value %a","sub",feature,fullname,value)
+                                        end
+                                        preparesubstitutions(tfmdata,feature,value,validlookups,lookuplist)
+                                        registerbasefeature(feature,value)
+                                        substitutionsdone = true
+                                    elseif basepositionings and basepositionings[feature] then
+                                        if trace_preparing then
+                                            report_prepare("filtering base %a feature %a for %a with value %a","pos",feature,fullname,value)
+                                        end
+                                        preparepositionings(tfmdata,feature,value,validlookups,lookuplist)
+                                        registerbasefeature(feature,value)
+                                        positioningsdone = true
+                                    end
+                                end
+                            end
+                        end
+                    end
+                end
+            end
+            --
+            if substitutionsdone then
+                checkmathreplacements(tfmdata,fullname)
+            end
+            --
+            registerbasehash(tfmdata)
+        end
+        if trace_preparing then
+            report_prepare("preparation time is %0.3f seconds for %a",os.clock()-starttime,fullname)
+        end
+    end
+end
+
+registerotffeature {
+    name         = "features",
+    description  = "features",
+    default      = true,
+    initializers = {
+     -- position = 1, -- after setscript (temp hack ... we need to force script / language to 1
+        base     = featuresinitializer,
+    }
+}
+
+otf.basemodeinitializer = featuresinitializer
+
+
+end --- [luaotfload, fontloader-2017-02-11.lua scope for “font-oto”] ---
+
+
+do  --- [luaotfload, fontloader-2017-02-11.lua scope for “font-otj” 5ea70db9f1990dc1459425853c79f663] ---
+
+if not modules then modules={} end modules ['font-otj']={
+  version=1.001,
+  comment="companion to font-lib.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files",
+}
+if not nodes.properties then return end
+local next,rawget=next,rawget
+local fastcopy=table.fastcopy
+local registertracker=trackers.register
+local trace_injections=false registertracker("fonts.injections",function(v) trace_injections=v end)
+local trace_marks=false registertracker("fonts.injections.marks",function(v) trace_marks=v end)
+local trace_cursive=false registertracker("fonts.injections.cursive",function(v) trace_cursive=v end)
+local trace_spaces=false registertracker("fonts.injections.spaces",function(v) trace_spaces=v end)
+local use_advance=false directives.register("fonts.injections.advance",function(v) use_advance=v end)
+local report_injections=logs.reporter("fonts","injections")
+local report_spaces=logs.reporter("fonts","spaces")
+local attributes,nodes,node=attributes,nodes,node
+fonts=fonts
+local hashes=fonts.hashes
+local fontdata=hashes.identifiers
+nodes.injections=nodes.injections or {}
+local injections=nodes.injections
+local tracers=nodes.tracers
+local setcolor=tracers and tracers.colors.set
+local resetcolor=tracers and tracers.colors.reset
+local nodecodes=nodes.nodecodes
+local glyph_code=nodecodes.glyph
+local disc_code=nodecodes.disc
+local kern_code=nodecodes.kern
+local glue_code=nodecodes.glue
+local nuts=nodes.nuts
+local nodepool=nuts.pool
+local newkern=nodepool.kern
+local tonode=nuts.tonode
+local tonut=nuts.tonut
+local getfield=nuts.getfield
+local setfield=nuts.setfield
+local getnext=nuts.getnext
+local getprev=nuts.getprev
+local getid=nuts.getid
+local getfont=nuts.getfont
+local getsubtype=nuts.getsubtype
+local getchar=nuts.getchar
+local getboth=nuts.getboth
+local ischar=nuts.is_char
+local getdisc=nuts.getdisc
+local setdisc=nuts.setdisc
+local traverse_id=nuts.traverse_id
+local traverse_char=nuts.traverse_char
+local insert_node_before=nuts.insert_before
+local insert_node_after=nuts.insert_after
+local properties=nodes.properties.data
+function injections.installnewkern(nk)
+  newkern=nk or newkern
+end
+local nofregisteredkerns=0
+local nofregisteredpairs=0
+local nofregisteredmarks=0
+local nofregisteredcursives=0
+local keepregisteredcounts=false
+function injections.keepcounts()
+  keepregisteredcounts=true
+end
+function injections.resetcounts()
+  nofregisteredkerns=0
+  nofregisteredpairs=0
+  nofregisteredmarks=0
+  nofregisteredcursives=0
+  keepregisteredcounts=false
+end
+function injections.reset(n)
+  local p=rawget(properties,n)
+  if p then
+    p.injections=false 
+  else
+    properties[n]=false 
+  end
+end
+function injections.copy(target,source)
+  local sp=rawget(properties,source)
+  if sp then
+    local tp=rawget(properties,target)
+    local si=sp.injections
+    if si then
+      si=fastcopy(si)
+      if tp then
+        tp.injections=si
+      else
+        propertydata[target]={
+          injections=si,
+        }
+      end
+    elseif tp then
+      tp.injections=false 
+    else
+      properties[target]={ injections={} }
+    end
+  else
+    local tp=rawget(properties,target)
+    if tp then
+      tp.injections=false 
+    else
+      properties[target]=false 
+    end
+  end
+end
+function injections.setligaindex(n,index)
+  local p=rawget(properties,n)
+  if p then
+    local i=p.injections
+    if i then
+      i.ligaindex=index
+    else
+      p.injections={
+        ligaindex=index
+      }
+    end
+  else
+    properties[n]={
+      injections={
+        ligaindex=index
+      }
+    }
+  end
+end
+function injections.getligaindex(n,default)
+  local p=rawget(properties,n)
+  if p then
+    local i=p.injections
+    if i then
+      return i.ligaindex or default
+    end
+  end
+  return default
+end
+function injections.setcursive(start,nxt,factor,rlmode,exit,entry,tfmstart,tfmnext) 
+  local dx=factor*(exit[1]-entry[1])
+  local dy=-factor*(exit[2]-entry[2])
+  local ws=tfmstart.width
+  local wn=tfmnext.width
+  nofregisteredcursives=nofregisteredcursives+1
+  if rlmode<0 then
+    dx=-(dx+wn)
+  else
+    dx=dx-ws
+  end
+  if dx==0 then
+    dx=0
+  end
+  local p=rawget(properties,start)
+  if p then
+    local i=p.injections
+    if i then
+      i.cursiveanchor=true
+    else
+      p.injections={
+        cursiveanchor=true,
+      }
+    end
+  else
+    properties[start]={
+      injections={
+        cursiveanchor=true,
+      },
+    }
+  end
+  local p=rawget(properties,nxt)
+  if p then
+    local i=p.injections
+    if i then
+      i.cursivex=dx
+      i.cursivey=dy
+    else
+      p.injections={
+        cursivex=dx,
+        cursivey=dy,
+      }
+    end
+  else
+    properties[nxt]={
+      injections={
+        cursivex=dx,
+        cursivey=dy,
+      },
+    }
+  end
+  return dx,dy,nofregisteredcursives
+end
+function injections.setpair(current,factor,rlmode,r2lflag,spec,injection) 
+  local x=factor*spec[1]
+  local y=factor*spec[2]
+  local w=factor*spec[3]
+  local h=factor*spec[4]
+  if x~=0 or w~=0 or y~=0 or h~=0 then 
+    local yoffset=y-h
+    local leftkern=x   
+    local rightkern=w-x 
+    if leftkern~=0 or rightkern~=0 or yoffset~=0 then
+      nofregisteredpairs=nofregisteredpairs+1
+      if rlmode and rlmode<0 then
+        leftkern,rightkern=rightkern,leftkern
+      end
+      if not injection then
+        injection="injections"
+      end
+      local p=rawget(properties,current)
+      if p then
+        local i=rawget(p,injection)
+        if i then
+          if leftkern~=0 then
+            i.leftkern=(i.leftkern or 0)+leftkern
+          end
+          if rightkern~=0 then
+            i.rightkern=(i.rightkern or 0)+rightkern
+          end
+          if yoffset~=0 then
+            i.yoffset=(i.yoffset or 0)+yoffset
+          end
+        elseif leftkern~=0 or rightkern~=0 then
+          p[injection]={
+            leftkern=leftkern,
+            rightkern=rightkern,
+            yoffset=yoffset,
+          }
+        else
+          p[injection]={
+            yoffset=yoffset,
+          }
+        end
+      elseif leftkern~=0 or rightkern~=0 then
+        properties[current]={
+          [injection]={
+            leftkern=leftkern,
+            rightkern=rightkern,
+            yoffset=yoffset,
+          },
+        }
+      else
+        properties[current]={
+          [injection]={
+            yoffset=yoffset,
+          },
+        }
+      end
+      return x,y,w,h,nofregisteredpairs
+     end
+  end
+  return x,y,w,h 
+end
+function injections.setkern(current,factor,rlmode,x,injection)
+  local dx=factor*x
+  if dx~=0 then
+    nofregisteredkerns=nofregisteredkerns+1
+    local p=rawget(properties,current)
+    if not injection then
+      injection="injections"
+    end
+    if p then
+      local i=rawget(p,injection)
+      if i then
+        i.leftkern=dx+(i.leftkern or 0)
+      else
+        p[injection]={
+          leftkern=dx,
+        }
+      end
+    else
+      properties[current]={
+        [injection]={
+          leftkern=dx,
+        },
+      }
+    end
+    return dx,nofregisteredkerns
+  else
+    return 0,0
+  end
+end
+function injections.setmark(start,base,factor,rlmode,ba,ma,tfmbase,mkmk,checkmark) 
+  local dx,dy=factor*(ba[1]-ma[1]),factor*(ba[2]-ma[2])
+  nofregisteredmarks=nofregisteredmarks+1
+  if rlmode>=0 then
+    dx=tfmbase.width-dx 
+  end
+  local p=rawget(properties,start)
+  if p then
+    local i=p.injections
+    if i then
+      if i.markmark then
+      else
+        i.markx=dx
+        i.marky=dy
+        i.markdir=rlmode or 0
+        i.markbase=nofregisteredmarks
+        i.markbasenode=base
+        i.markmark=mkmk
+        i.checkmark=checkmark
+      end
+    else
+      p.injections={
+        markx=dx,
+        marky=dy,
+        markdir=rlmode or 0,
+        markbase=nofregisteredmarks,
+        markbasenode=base,
+        markmark=mkmk,
+        checkmark=checkmark,
+      }
+    end
+  else
+    properties[start]={
+      injections={
+        markx=dx,
+        marky=dy,
+        markdir=rlmode or 0,
+        markbase=nofregisteredmarks,
+        markbasenode=base,
+        markmark=mkmk,
+        checkmark=checkmark,
+      },
+    }
+  end
+  return dx,dy,nofregisteredmarks
+end
+local function dir(n)
+  return (n and n<0 and "r-to-l") or (n and n>0 and "l-to-r") or "unset"
+end
+local function showchar(n,nested)
+  local char=getchar(n)
+  report_injections("%wfont %s, char %U, glyph %c",nested and 2 or 0,getfont(n),char,char)
+end
+local function show(n,what,nested,symbol)
+  if n then
+    local p=rawget(properties,n)
+    if p then
+      local i=rawget(p,what)
+      if i then
+        local leftkern=i.leftkern or 0
+        local rightkern=i.rightkern or 0
+        local yoffset=i.yoffset  or 0
+        local markx=i.markx   or 0
+        local marky=i.marky   or 0
+        local markdir=i.markdir  or 0
+        local markbase=i.markbase or 0
+        local cursivex=i.cursivex or 0
+        local cursivey=i.cursivey or 0
+        local ligaindex=i.ligaindex or 0
+        local cursbase=i.cursiveanchor
+        local margin=nested and 4 or 2
+        if rightkern~=0 or yoffset~=0 then
+          report_injections("%w%s pair: lx %p, rx %p, dy %p",margin,symbol,leftkern,rightkern,yoffset)
+        elseif leftkern~=0 then
+          report_injections("%w%s kern: dx %p",margin,symbol,leftkern)
+        end
+        if markx~=0 or marky~=0 or markbase~=0 then
+          report_injections("%w%s mark: dx %p, dy %p, dir %s, base %s",margin,symbol,markx,marky,markdir,markbase~=0 and "yes" or "no")
+        end
+        if cursivex~=0 or cursivey~=0 then
+          if cursbase then
+            report_injections("%w%s curs: base dx %p, dy %p",margin,symbol,cursivex,cursivey)
+          else
+            report_injections("%w%s curs: dx %p, dy %p",margin,symbol,cursivex,cursivey)
+          end
+        elseif cursbase then
+          report_injections("%w%s curs: base",margin,symbol)
+        end
+        if ligaindex~=0 then
+          report_injections("%w%s liga: index %i",margin,symbol,ligaindex)
+        end
+      end
+    end
+  end
+end
+local function showsub(n,what,where)
+  report_injections("begin subrun: %s",where)
+  for n in traverse_id(glyph_code,n) do
+    showchar(n,where)
+    show(n,what,where," ")
+  end
+  report_injections("end subrun")
+end
+local function trace(head,where)
+  report_injections("begin run %s: %s kerns, %s pairs, %s marks and %s cursives registered",
+    where or "",nofregisteredkerns,nofregisteredpairs,nofregisteredmarks,nofregisteredcursives)
+  local n=head
+  while n do
+    local id=getid(n)
+    if id==glyph_code then
+      showchar(n)
+      show(n,"injections",false," ")
+      show(n,"preinjections",false,"<")
+      show(n,"postinjections",false,">")
+      show(n,"replaceinjections",false,"=")
+      show(n,"emptyinjections",false,"*")
+    elseif id==disc_code then
+      local pre,post,replace=getdisc(n)
+      if pre then
+        showsub(pre,"preinjections","pre")
+      end
+      if post then
+        showsub(post,"postinjections","post")
+      end
+      if replace then
+        showsub(replace,"replaceinjections","replace")
+      end
+      show(n,"emptyinjections",false,"*")
+    end
+    n=getnext(n)
+  end
+  report_injections("end run")
+end
+local function show_result(head)
+  local current=head
+  local skipping=false
+  while current do
+    local id=getid(current)
+    if id==glyph_code then
+      report_injections("char: %C, width %p, xoffset %p, yoffset %p",
+        getchar(current),getfield(current,"width"),getfield(current,"xoffset"),getfield(current,"yoffset"))
+      skipping=false
+    elseif id==kern_code then
+      report_injections("kern: %p",getfield(current,"kern"))
+      skipping=false
+    elseif not skipping then
+      report_injections()
+      skipping=true
+    end
+    current=getnext(current)
+  end
+end
+local function inject_kerns_only(head,where)
+  head=tonut(head)
+  if trace_injections then
+    trace(head,"kerns")
+  end
+  local current=head
+  local prev=nil
+  local next=nil
+  local prevdisc=nil
+  local prevglyph=nil
+  local pre=nil 
+  local post=nil 
+  local replace=nil 
+  local pretail=nil 
+  local posttail=nil 
+  local replacetail=nil 
+  while current do
+    local id=getid(current)
+    local next=getnext(current)
+    if id==glyph_code then
+      if getsubtype(current)<256 then
+        local p=rawget(properties,current)
+        if p then
+          local i=p.injections
+          if i then
+            local leftkern=i.leftkern
+            if leftkern and leftkern~=0 then
+              if use_advance then
+                setfield(current,"xoffset",leftkern)
+                setfield(current,"xadvance",leftkern)
+              else
+                insert_node_before(head,current,newkern(leftkern))
+              end
+            end
+          end
+          if prevdisc then
+            local done=false
+            if post then
+              local i=p.postinjections
+              if i then
+                local leftkern=i.leftkern
+                if leftkern and leftkern~=0 then
+                  if use_advance then
+                    setfield(post,"xadvance",leftkern)
+                  else
+                    insert_node_after(post,posttail,newkern(leftkern))
+                    done=true
+                  end
+                end
+              end
+            end
+            if replace then
+              local i=p.replaceinjections
+              if i then
+                local leftkern=i.leftkern
+                if leftkern and leftkern~=0 then
+                  if use_advance then
+                    setfield(replace,"xadvance",leftkern)
+                  else
+                    insert_node_after(replace,replacetail,newkern(leftkern))
+                    done=true
+                  end
+                end
+              end
+            else
+              local i=p.emptyinjections
+              if i then
+                local leftkern=i.leftkern
+                if leftkern and leftkern~=0 then
+                  setfield(prev,"replace",newkern(leftkern)) 
+                end
+              end
+            end
+            if done then
+              setdisc(prevdisc,pre,post,replace)
+            end
+          end
+        end
+      end
+      prevdisc=nil
+      prevglyph=current
+    elseif id==disc_code then
+      pre,post,replace,pretail,posttail,replacetail=getdisc(current,true)
+      local done=false
+      if pre then
+        for n in traverse_char(pre) do
+          local p=rawget(properties,n)
+          if p then
+            local i=p.injections or p.preinjections
+            if i then
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                if use_advance then
+                  setfield(pre,"xoffset",leftkern)
+                  setfield(pre,"xadvance",leftkern)
+                else
+                  pre=insert_node_before(pre,n,newkern(leftkern))
+                  done=true
+                end
+              end
+            end
+          end
+        end
+      end
+      if post then
+        for n in traverse_char(post) do
+          local p=rawget(properties,n)
+          if p then
+            local i=p.injections or p.postinjections
+            if i then
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                if use_advance then
+                  setfield(post,"xoffset",leftkern)
+                  setfield(post,"xadvance",leftkern)
+                else
+                  post=insert_node_before(post,n,newkern(leftkern))
+                  done=true
+                end
+              end
+            end
+          end
+        end
+      end
+      if replace then
+        for n in traverse_char(replace) do
+          local p=rawget(properties,n)
+          if p then
+            local i=p.injections or p.replaceinjections
+            if i then
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                if use_advance then
+                  setfield(replace,"xoffset",leftkern)
+                  setfield(replace,"xadvance",leftkern)
+                else
+                  replace=insert_node_before(replace,n,newkern(leftkern))
+                  done=true
+                end
+              end
+            end
+          end
+        end
+      end
+      if done then
+        setdisc(current,pre,post,replace)
+      end
+      prevglyph=nil
+      prevdisc=current
+    else
+      prevglyph=nil
+      prevdisc=nil
+    end
+    prev=current
+    current=next
+  end
+  if keepregisteredcounts then
+    keepregisteredcounts=false
+  else
+    nofregisteredkerns=0
+  end
+  return tonode(head),true
+end
+local function inject_pairs_only(head,where)
+  head=tonut(head)
+  if trace_injections then
+    trace(head,"pairs")
+  end
+  local current=head
+  local prev=nil
+  local next=nil
+  local prevdisc=nil
+  local prevglyph=nil
+  local pre=nil 
+  local post=nil 
+  local replace=nil 
+  local pretail=nil 
+  local posttail=nil 
+  local replacetail=nil 
+  while current do
+    local id=getid(current)
+    local next=getnext(current)
+    if id==glyph_code then
+      if getsubtype(current)<256 then
+        local p=rawget(properties,current)
+        if p then
+          local i=p.injections
+          if i then
+            local yoffset=i.yoffset
+            if yoffset and yoffset~=0 then
+              setfield(current,"yoffset",yoffset)
+            end
+            local leftkern=i.leftkern
+            if leftkern and leftkern~=0 then
+              head=insert_node_before(head,current,newkern(leftkern))
+            end
+            local rightkern=i.rightkern
+            if rightkern and rightkern~=0 then
+              insert_node_after(head,current,newkern(rightkern))
+            end
+          else
+            local i=p.emptyinjections
+            if i then
+              local rightkern=i.rightkern
+              if rightkern and rightkern~=0 then
+                if next and getid(next)==disc_code then
+                  if replace then
+                  else
+                    setfield(next,"replace",newkern(rightkern)) 
+                  end
+                end
+              end
+            end
+          end
+          if prevdisc then
+            local done=false
+            if post then
+              local i=p.postinjections
+              if i then
+                local leftkern=i.leftkern
+                if leftkern and leftkern~=0 then
+                  insert_node_after(post,posttail,newkern(leftkern))
+                  done=true
+                end
+              end
+            end
+            if replace then
+              local i=p.replaceinjections
+              if i then
+                local leftkern=i.leftkern
+                if leftkern and leftkern~=0 then
+                  insert_node_after(replace,replacetail,newkern(leftkern))
+                  done=true
+                end
+              end
+            else
+              local i=p.emptyinjections
+              if i then
+                local leftkern=i.leftkern
+                if leftkern and leftkern~=0 then
+                  setfield(prev,"replace",newkern(leftkern)) 
+                end
+              end
+            end
+            if done then
+              setdisc(prevdisc,pre,post,replace)
+            end
+          end
+        end
+      end
+      prevdisc=nil
+      prevglyph=current
+    elseif id==disc_code then
+      pre,post,replace,pretail,posttail,replacetail=getdisc(current,true)
+      local done=false
+      if pre then
+        for n in traverse_char(pre) do
+          local p=rawget(properties,n)
+          if p then
+            local i=p.injections or p.preinjections
+            if i then
+              local yoffset=i.yoffset
+              if yoffset and yoffset~=0 then
+                setfield(n,"yoffset",yoffset)
+              end
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                pre=insert_node_before(pre,n,newkern(leftkern))
+                done=true
+              end
+              local rightkern=i.rightkern
+              if rightkern and rightkern~=0 then
+                insert_node_after(pre,n,newkern(rightkern))
+                done=true
+              end
+            end
+          end
+        end
+      end
+      if post then
+        for n in traverse_char(post) do
+          local p=rawget(properties,n)
+          if p then
+            local i=p.injections or p.postinjections
+            if i then
+              local yoffset=i.yoffset
+              if yoffset and yoffset~=0 then
+                setfield(n,"yoffset",yoffset)
+              end
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                post=insert_node_before(post,n,newkern(leftkern))
+                done=true
+              end
+              local rightkern=i.rightkern
+              if rightkern and rightkern~=0 then
+                insert_node_after(post,n,newkern(rightkern))
+                done=true
+              end
+            end
+          end
+        end
+      end
+      if replace then
+        for n in traverse_char(replace) do
+          local p=rawget(properties,n)
+          if p then
+            local i=p.injections or p.replaceinjections
+            if i then
+              local yoffset=i.yoffset
+              if yoffset and yoffset~=0 then
+                setfield(n,"yoffset",yoffset)
+              end
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                replace=insert_node_before(replace,n,newkern(leftkern))
+                done=true
+              end
+              local rightkern=i.rightkern
+              if rightkern and rightkern~=0 then
+                insert_node_after(replace,n,newkern(rightkern))
+                done=true
+              end
+            end
+          end
+        end
+      end
+      if prevglyph then
+        if pre then
+          local p=rawget(properties,prevglyph)
+          if p then
+            local i=p.preinjections
+            if i then
+              local rightkern=i.rightkern
+              if rightkern and rightkern~=0 then
+                pre=insert_node_before(pre,pre,newkern(rightkern))
+                done=true
+              end
+            end
+          end
+        end
+        if replace then
+          local p=rawget(properties,prevglyph)
+          if p then
+            local i=p.replaceinjections
+            if i then
+              local rightkern=i.rightkern
+              if rightkern and rightkern~=0 then
+                replace=insert_node_before(replace,replace,newkern(rightkern))
+                done=true
+              end
+            end
+          end
+        end
+      end
+      if done then
+        setdisc(current,pre,post,replace)
+      end
+      prevglyph=nil
+      prevdisc=current
+    else
+      prevglyph=nil
+      prevdisc=nil
+    end
+    prev=current
+    current=next
+  end
+  if keepregisteredcounts then
+    keepregisteredcounts=false
+  else
+    nofregisteredkerns=0
+  end
+  return tonode(head),true
+end
+local function showoffset(n,flag)
+  local o=getfield(n,"xoffset")
+  if o==0 then
+    o=getfield(n,"yoffset")
+  end
+  if o~=0 then
+    setcolor(n,flag and "darkred" or "darkgreen")
+  else
+    resetcolor(n)
+  end
+end
+local function inject_everything(head,where)
+  head=tonut(head)
+  if trace_injections then
+    trace(head,"everything")
+  end
+  local hascursives=nofregisteredcursives>0
+  local hasmarks=nofregisteredmarks>0
+  local current=head
+  local last=nil
+  local font=font
+  local markdata=nil
+  local prev=nil
+  local next=nil
+  local prevdisc=nil
+  local prevglyph=nil
+  local pre=nil 
+  local post=nil 
+  local replace=nil 
+  local pretail=nil 
+  local posttail=nil 
+  local replacetail=nil
+  local cursiveanchor=nil
+  local minc=0
+  local maxc=0
+  local glyphs={}
+  local marks={}
+  local nofmarks=0
+  local function processmark(p,n,pn) 
+    local px=getfield(p,"xoffset")
+    local ox=0
+    local rightkern=nil
+    local pp=rawget(properties,p)
+    if pp then
+      pp=pp.injections
+      if pp then
+        rightkern=pp.rightkern
+      end
+    end
+    if rightkern then 
+      if pn.markdir<0 then
+        ox=px-pn.markx-rightkern
+      else
+        if false then
+          local leftkern=pp.leftkern
+          if leftkern then
+            ox=px-pn.markx-leftkern
+          else
+            ox=px-pn.markx
+          end
+        else
+          ox=px-pn.markx
+        end
+      end
+    else
+        ox=px-pn.markx
+      if pn.checkmark then
+        local wn=getfield(n,"width") 
+        if wn~=0 then
+          wn=wn/2
+          if trace_injections then
+            report_injections("correcting non zero width mark %C",getchar(n))
+          end
+          insert_node_before(n,n,newkern(-wn))
+          insert_node_after(n,n,newkern(-wn))
+        end
+      end
+    end
+    local oy=getfield(n,"yoffset")+getfield(p,"yoffset")+pn.marky
+    setfield(n,"xoffset",ox)
+    setfield(n,"yoffset",oy)
+    if trace_marks then
+      showoffset(n,true)
+    end
+  end
+  while current do
+    local id=getid(current)
+    local next=getnext(current)
+    if id==glyph_code then
+      if getsubtype(current)<256 then
+        local p=rawget(properties,current)
+        if p then
+          local i=p.injections
+          if i then
+            local pm=i.markbasenode
+            if pm then
+              nofmarks=nofmarks+1
+              marks[nofmarks]=current
+            else
+              local yoffset=i.yoffset
+              if yoffset and yoffset~=0 then
+                setfield(current,"yoffset",yoffset)
+              end
+              if hascursives then
+                local cursivex=i.cursivex
+                if cursivex then
+                  if cursiveanchor then
+                    if cursivex~=0 then
+                      i.leftkern=(i.leftkern or 0)+cursivex
+                    end
+                    if maxc==0 then
+                      minc=1
+                      maxc=1
+                      glyphs[1]=cursiveanchor
+                    else
+                      maxc=maxc+1
+                      glyphs[maxc]=cursiveanchor
+                    end
+                    properties[cursiveanchor].cursivedy=i.cursivey 
+                    last=current
+                  else
+                    maxc=0
+                  end
+                elseif maxc>0 then
+                  local ny=getfield(current,"yoffset")
+                  for i=maxc,minc,-1 do
+                    local ti=glyphs[i]
+                    ny=ny+properties[ti].cursivedy
+                    setfield(ti,"yoffset",ny) 
+                    if trace_cursive then
+                      showoffset(ti)
+                    end
+                  end
+                  maxc=0
+                  cursiveanchor=nil
+                end
+                if i.cursiveanchor then
+                  cursiveanchor=current 
+                else
+                  if maxc>0 then
+                    local ny=getfield(current,"yoffset")
+                    for i=maxc,minc,-1 do
+                      local ti=glyphs[i]
+                      ny=ny+properties[ti].cursivedy
+                      setfield(ti,"yoffset",ny) 
+                      if trace_cursive then
+                        showoffset(ti)
+                      end
+                    end
+                    maxc=0
+                  end
+                  cursiveanchor=nil
+                end
+              end
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                insert_node_before(head,current,newkern(leftkern))
+              end
+              local rightkern=i.rightkern
+              if rightkern and rightkern~=0 then
+                insert_node_after(head,current,newkern(rightkern))
+              end
+            end
+          else
+            local i=p.emptyinjections
+            if i then
+              local rightkern=i.rightkern
+              if rightkern and rightkern~=0 then
+                if next and getid(next)==disc_code then
+                  if replace then
+                  else
+                    setfield(next,"replace",newkern(rightkern)) 
+                  end
+                end
+              end
+            end
+          end
+          if prevdisc then
+            if p then
+              local done=false
+              if post then
+                local i=p.postinjections
+                if i then
+                  local leftkern=i.leftkern
+                  if leftkern and leftkern~=0 then
+                    insert_node_after(post,posttail,newkern(leftkern))
+                    done=true
+                  end
+                end
+              end
+              if replace then
+                local i=p.replaceinjections
+                if i then
+                  local leftkern=i.leftkern
+                  if leftkern and leftkern~=0 then
+                    insert_node_after(replace,replacetail,newkern(leftkern))
+                    done=true
+                  end
+                end
+              else
+                local i=p.emptyinjections
+                if i then
+                  local leftkern=i.leftkern
+                  if leftkern and leftkern~=0 then
+                    setfield(prev,"replace",newkern(leftkern)) 
+                  end
+                end
+              end
+              if done then
+                setdisc(prevdisc,pre,post,replace)
+              end
+            end
+          end
+        else
+          if hascursives and maxc>0 then
+            local ny=getfield(current,"yoffset")
+            for i=maxc,minc,-1 do
+              local ti=glyphs[i]
+              ny=ny+properties[ti].cursivedy
+              setfield(ti,"yoffset",getfield(ti,"yoffset")+ny) 
+            end
+            maxc=0
+            cursiveanchor=nil
+          end
+        end
+      end
+      prevdisc=nil
+      prevglyph=current
+    elseif id==disc_code then
+      pre,post,replace,pretail,posttail,replacetail=getdisc(current,true)
+      local done=false
+      if pre then
+        for n in traverse_char(pre) do
+          local p=rawget(properties,n)
+          if p then
+            local i=p.injections or p.preinjections
+            if i then
+              local yoffset=i.yoffset
+              if yoffset and yoffset~=0 then
+                setfield(n,"yoffset",yoffset)
+              end
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                pre=insert_node_before(pre,n,newkern(leftkern))
+                done=true
+              end
+              local rightkern=i.rightkern
+              if rightkern and rightkern~=0 then
+                insert_node_after(pre,n,newkern(rightkern))
+                done=true
+              end
+              if hasmarks then
+                local pm=i.markbasenode
+                if pm then
+                  processmark(pm,current,i)
+                end
+              end
+            end
+          end
+        end
+      end
+      if post then
+        for n in traverse_char(post) do
+          local p=rawget(properties,n)
+          if p then
+            local i=p.injections or p.postinjections
+            if i then
+              local yoffset=i.yoffset
+              if yoffset and yoffset~=0 then
+                setfield(n,"yoffset",yoffset)
+              end
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                post=insert_node_before(post,n,newkern(leftkern))
+                done=true
+              end
+              local rightkern=i.rightkern
+              if rightkern and rightkern~=0 then
+                insert_node_after(post,n,newkern(rightkern))
+                done=true
+              end
+              if hasmarks then
+                local pm=i.markbasenode
+                if pm then
+                  processmark(pm,current,i)
+                end
+              end
+            end
+          end
+        end
+      end
+      if replace then
+        for n in traverse_char(replace) do
+          local p=rawget(properties,n)
+          if p then
+            local i=p.injections or p.replaceinjections
+            if i then
+              local yoffset=i.yoffset
+              if yoffset and yoffset~=0 then
+                setfield(n,"yoffset",yoffset)
+              end
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                replace=insert_node_before(replace,n,newkern(leftkern))
+                done=true
+              end
+              local rightkern=i.rightkern
+              if rightkern and rightkern~=0 then
+                insert_node_after(replace,n,newkern(rightkern))
+                done=true
+              end
+              if hasmarks then
+                local pm=i.markbasenode
+                if pm then
+                  processmark(pm,current,i)
+                end
+              end
+            end
+          end
+        end
+      end
+      if prevglyph then
+        if pre then
+          local p=rawget(properties,prevglyph)
+          if p then
+            local i=p.preinjections
+            if i then
+              local rightkern=i.rightkern
+              if rightkern and rightkern~=0 then
+                pre=insert_node_before(pre,pre,newkern(rightkern))
+                done=true
+              end
+            end
+          end
+        end
+        if replace then
+          local p=rawget(properties,prevglyph)
+          if p then
+            local i=p.replaceinjections
+            if i then
+              local rightkern=i.rightkern
+              if rightkern and rightkern~=0 then
+                replace=insert_node_before(replace,replace,newkern(rightkern))
+                done=true
+              end
+            end
+          end
+        end
+      end
+      if done then
+        setdisc(current,pre,post,replace)
+      end
+      prevglyph=nil
+      prevdisc=current
+    else
+      prevglyph=nil
+      prevdisc=nil
+    end
+    prev=current
+    current=next
+  end
+  if hascursives and maxc>0 then
+    local ny=getfield(last,"yoffset")
+    for i=maxc,minc,-1 do
+      local ti=glyphs[i]
+      ny=ny+properties[ti].cursivedy
+      setfield(ti,"yoffset",ny) 
+      if trace_cursive then
+        showoffset(ti)
+      end
+    end
+  end
+  if nofmarks>0 then
+    for i=1,nofmarks do
+      local m=marks[i]
+      local p=rawget(properties,m)
+      local i=p.injections
+      local b=i.markbasenode
+      processmark(b,m,i)
+    end
+  elseif hasmarks then
+  end
+  if keepregisteredcounts then
+    keepregisteredcounts=false
+  else
+    nofregisteredkerns=0
+    nofregisteredpairs=0
+    nofregisteredmarks=0
+    nofregisteredcursives=0
+  end
+  return tonode(head),true
+end
+local triggers=false
+function nodes.injections.setspacekerns(font,sequence)
+  if triggers then
+    triggers[font]=sequence
+  else
+    triggers={ [font]=sequence }
+  end
+end
+local getthreshold
+if context then
+  local threshold=1 
+  local parameters=fonts.hashes.parameters
+  directives.register("otf.threshold",function(v) threshold=tonumber(v) or 1 end)
+  getthreshold=function(font)
+    local p=parameters[font]
+    local f=p.factor
+    local s=p.spacing
+    local t=threshold*(s and s.width or p.space or 0)-2
+    return t>0 and t or 0,f
+  end
+else
+  injections.threshold=0
+  getthreshold=function(font)
+    local p=fontdata[font].parameters
+    local f=p.factor
+    local s=p.spacing
+    local t=injections.threshold*(s and s.width or p.space or 0)-2
+    return t>0 and t or 0,f
+  end
+end
+injections.getthreshold=getthreshold
+function injections.isspace(n,threshold)
+  if getid(n)==glue_code then
+    local w=getfield(n,"width")
+    if threshold and w>threshold then 
+      return 32
+    end
+  end
+end
+local function injectspaces(head)
+  if not triggers then
+    return head,false
+  end
+  local lastfont=nil
+  local spacekerns=nil
+  local leftkerns=nil
+  local rightkerns=nil
+  local factor=0
+  local threshold=0
+  local leftkern=false
+  local rightkern=false
+  local function updatefont(font,trig)
+    leftkerns=trig.left
+    rightkerns=trig.right
+    lastfont=font
+    threshold,
+    factor=getthreshold(font)
+  end
+  for n in traverse_id(glue_code,tonut(head)) do
+    local prev,next=getboth(n)
+    local prevchar=ischar(prev)
+    local nextchar=ischar(next)
+    if nextchar then
+      local font=getfont(next)
+      local trig=triggers[font]
+      if trig then
+        if lastfont~=font then
+          updatefont(font,trig)
+        end
+        if rightkerns then
+          rightkern=rightkerns[nextchar]
+        end
+      end
+    end
+    if prevchar then
+      local font=getfont(prev)
+      local trig=triggers[font]
+      if trig then
+        if lastfont~=font then
+          updatefont(font,trig)
+        end
+        if leftkerns then
+          leftkern=leftkerns[prevchar]
+        end
+      end
+    end
+    if leftkern then
+      local old=getfield(n,"width")
+      if old>threshold then
+        if rightkern then
+          local new=old+(leftkern+rightkern)*factor
+          if trace_spaces then
+            report_spaces("%C [%p -> %p] %C",prevchar,old,new,nextchar)
+          end
+          setfield(n,"width",new)
+          leftkern=false
+        else
+          local new=old+leftkern*factor
+          if trace_spaces then
+            report_spaces("%C [%p -> %p]",prevchar,old,new)
+          end
+          setfield(n,"width",new)
+        end
+      end
+      leftkern=false
+    elseif rightkern then
+      local old=getfield(n,"width")
+      if old>threshold then
+        local new=old+rightkern*factor
+        if trace_spaces then
+          report_spaces("[%p -> %p] %C",nextchar,old,new)
+        end
+        setfield(n,"width",new)
+      end
+      rightkern=false
+    end
+  end
+  triggers=false
+  return head,true
+end
+function injections.handler(head,where)
+  if triggers then
+    head=injectspaces(head)
+  end
+  if nofregisteredmarks>0 or nofregisteredcursives>0 then
+    if trace_injections then
+      report_injections("injection variant %a","everything")
+    end
+    return inject_everything(head,where)
+  elseif nofregisteredpairs>0 then
+    if trace_injections then
+      report_injections("injection variant %a","pairs")
+    end
+    return inject_pairs_only(head,where)
+  elseif nofregisteredkerns>0 then
+    if trace_injections then
+      report_injections("injection variant %a","kerns")
+    end
+    return inject_kerns_only(head,where)
+  else
+    return head,false
+  end
+end
+
+end --- [luaotfload, fontloader-2017-02-11.lua scope for “font-otj”] ---
+
+
+do  --- [luaotfload, fontloader-2017-02-11.lua scope for “font-ota” c281d18dfc89a8ca18af64f55e9fa92b] ---
+
+if not modules then modules={} end modules ['font-ota']={
+  version=1.001,
+  comment="companion to font-otf.lua (analysing)",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local type=type
+if not trackers then trackers={ register=function() end } end
+local fonts,nodes,node=fonts,nodes,node
+local allocate=utilities.storage.allocate
+local otf=fonts.handlers.otf
+local analyzers=fonts.analyzers
+local initializers=allocate()
+local methods=allocate()
+analyzers.initializers=initializers
+analyzers.methods=methods
+local a_state=attributes.private('state')
+local nuts=nodes.nuts
+local tonut=nuts.tonut
+local getfield=nuts.getfield
+local getnext=nuts.getnext
+local getprev=nuts.getprev
+local getprev=nuts.getprev
+local getprop=nuts.getprop
+local setprop=nuts.setprop
+local getfont=nuts.getfont
+local getsubtype=nuts.getsubtype
+local getchar=nuts.getchar
+local ischar=nuts.is_char
+local traverse_id=nuts.traverse_id
+local end_of_math=nuts.end_of_math
+local nodecodes=nodes.nodecodes
+local disc_code=nodecodes.disc
+local math_code=nodecodes.math
+local fontdata=fonts.hashes.identifiers
+local categories=characters and characters.categories or {} 
+local chardata=characters and characters.data
+local otffeatures=fonts.constructors.features.otf
+local registerotffeature=otffeatures.register
+local s_init=1  local s_rphf=7
+local s_medi=2  local s_half=8
+local s_fina=3  local s_pref=9
+local s_isol=4  local s_blwf=10
+local s_mark=5  local s_pstf=11
+local s_rest=6
+local states={
+  init=s_init,
+  medi=s_medi,
+  med2=s_medi,
+  fina=s_fina,
+  fin2=s_fina,
+  fin3=s_fina,
+  isol=s_isol,
+  mark=s_mark,
+  rest=s_rest,
+  rphf=s_rphf,
+  half=s_half,
+  pref=s_pref,
+  blwf=s_blwf,
+  pstf=s_pstf,
+}
+local features={
+  init=s_init,
+  medi=s_medi,
+  med2=s_medi,
+  fina=s_fina,
+  fin2=s_fina,
+  fin3=s_fina,
+  isol=s_isol,
+  rphf=s_rphf,
+  half=s_half,
+  pref=s_pref,
+  blwf=s_blwf,
+  pstf=s_pstf,
+}
+analyzers.states=states
+analyzers.features=features
+analyzers.useunicodemarks=false
+function analyzers.setstate(head,font)
+  local useunicodemarks=analyzers.useunicodemarks
+  local tfmdata=fontdata[font]
+  local descriptions=tfmdata.descriptions
+  local first,last,current,n,done=nil,nil,head,0,false 
+  current=tonut(current)
+  while current do
+    local char,id=ischar(current,font)
+    if char and not getprop(current,a_state) then
+      done=true
+      local d=descriptions[char]
+      if d then
+        if d.class=="mark" then
+          done=true
+          setprop(current,a_state,s_mark)
+        elseif useunicodemarks and categories[char]=="mn" then
+          done=true
+          setprop(current,a_state,s_mark)
+        elseif n==0 then
+          first,last,n=current,current,1
+          setprop(current,a_state,s_init)
+        else
+          last,n=current,n+1
+          setprop(current,a_state,s_medi)
+        end
+      else 
+        if first and first==last then
+          setprop(last,a_state,s_isol)
+        elseif last then
+          setprop(last,a_state,s_fina)
+        end
+        first,last,n=nil,nil,0
+      end
+    elseif char==false then
+      if first and first==last then
+        setprop(last,a_state,s_isol)
+      elseif last then
+        setprop(last,a_state,s_fina)
+      end
+      first,last,n=nil,nil,0
+      if id==math_code then
+        current=end_of_math(current)
+      end
+    elseif id==disc_code then
+      setprop(current,a_state,s_medi)
+      last=current
+    else 
+      if first and first==last then
+        setprop(last,a_state,s_isol)
+      elseif last then
+        setprop(last,a_state,s_fina)
+      end
+      first,last,n=nil,nil,0
+      if id==math_code then
+        current=end_of_math(current)
+      end
+    end
+    current=getnext(current)
+  end
+  if first and first==last then
+    setprop(last,a_state,s_isol)
+  elseif last then
+    setprop(last,a_state,s_fina)
+  end
+  return head,done
+end
+local function analyzeinitializer(tfmdata,value) 
+  local script,language=otf.scriptandlanguage(tfmdata) 
+  local action=initializers[script]
+  if not action then
+  elseif type(action)=="function" then
+    return action(tfmdata,value)
+  else
+    local action=action[language]
+    if action then
+      return action(tfmdata,value)
+    end
+  end
+end
+local function analyzeprocessor(head,font,attr)
+  local tfmdata=fontdata[font]
+  local script,language=otf.scriptandlanguage(tfmdata,attr)
+  local action=methods[script]
+  if not action then
+  elseif type(action)=="function" then
+    return action(head,font,attr)
+  else
+    action=action[language]
+    if action then
+      return action(head,font,attr)
+    end
+  end
+  return head,false
+end
+registerotffeature {
+  name="analyze",
+  description="analysis of character classes",
+  default=true,
+  initializers={
+    node=analyzeinitializer,
+  },
+  processors={
+    position=1,
+    node=analyzeprocessor,
+  }
+}
+methods.latn=analyzers.setstate
+local arab_warned={}
+local function warning(current,what)
+  local char=getchar(current)
+  if not arab_warned[char] then
+    log.report("analyze","arab: character %C has no %a class",char,what)
+    arab_warned[char]=true
+  end
+end
+local mappers={
+  l=s_init,
+  d=s_medi,
+  c=s_medi,
+  r=s_fina,
+  u=s_isol,
+}
+local classifiers=characters.classifiers
+if not classifiers then
+  local f_arabic,l_arabic=characters.blockrange("arabic")
+  local f_syriac,l_syriac=characters.blockrange("syriac")
+  local f_mandiac,l_mandiac=characters.blockrange("mandiac")
+  local f_nko,l_nko=characters.blockrange("nko")
+  local f_ext_a,l_ext_a=characters.blockrange("arabicextendeda")
+  classifiers=table.setmetatableindex(function(t,k)
+    if type(k)=="number" then
+      local c=chardata[k]
+      local v=false
+      if c then
+        local arabic=c.arabic
+        if arabic then
+          v=mappers[arabic]
+          if not v then
+            log.report("analyze","error in mapping arabic %C",k)
+            v=false
+          end
+        elseif (k>=f_arabic and k<=l_arabic) or
+            (k>=f_syriac and k<=l_syriac) or
+            (k>=f_mandiac and k<=l_mandiac) or
+            (k>=f_nko   and k<=l_nko)   or
+            (k>=f_ext_a  and k<=l_ext_a)  then
+          if categories[k]=="mn" then
+            v=s_mark
+          else
+            v=s_rest
+          end
+        end
+      end
+      t[k]=v
+      return v
+    end
+  end)
+  characters.classifiers=classifiers
+end
+function methods.arab(head,font,attr)
+  local first,last=nil,nil
+  local c_first,c_last=nil,nil
+  local current,done=head,false
+  current=tonut(current)
+  while current do
+    local char,id=ischar(current,font)
+    if char and not getprop(current,a_state) then
+      done=true
+      local classifier=classifiers[char]
+      if not classifier then
+        if last then
+          if c_last==s_medi or c_last==s_fina then
+            setprop(last,a_state,s_fina)
+          else
+            warning(last,"fina")
+            setprop(last,a_state,s_error)
+          end
+          first,last=nil,nil
+        elseif first then
+          if c_first==s_medi or c_first==s_fina then
+            setprop(first,a_state,s_isol)
+          else
+            warning(first,"isol")
+            setprop(first,a_state,s_error)
+          end
+          first=nil
+        end
+      elseif classifier==s_mark then
+        setprop(current,a_state,s_mark)
+      elseif classifier==s_isol then
+        if last then
+          if c_last==s_medi or c_last==s_fina then
+            setprop(last,a_state,s_fina)
+          else
+            warning(last,"fina")
+            setprop(last,a_state,s_error)
+          end
+          first,last=nil,nil
+        elseif first then
+          if c_first==s_medi or c_first==s_fina then
+            setprop(first,a_state,s_isol)
+          else
+            warning(first,"isol")
+            setprop(first,a_state,s_error)
+          end
+          first=nil
+        end
+        setprop(current,a_state,s_isol)
+      elseif classifier==s_medi then
+        if first then
+          last=current
+          c_last=classifier
+          setprop(current,a_state,s_medi)
+        else
+          setprop(current,a_state,s_init)
+          first=current
+          c_first=classifier
+        end
+      elseif classifier==s_fina then
+        if last then
+          if getprop(last,a_state)~=s_init then
+            setprop(last,a_state,s_medi)
+          end
+          setprop(current,a_state,s_fina)
+          first,last=nil,nil
+        elseif first then
+          setprop(current,a_state,s_fina)
+          first=nil
+        else
+          setprop(current,a_state,s_isol)
+        end
+      else 
+        setprop(current,a_state,s_rest)
+        if last then
+          if c_last==s_medi or c_last==s_fina then
+            setprop(last,a_state,s_fina)
+          else
+            warning(last,"fina")
+            setprop(last,a_state,s_error)
+          end
+          first,last=nil,nil
+        elseif first then
+          if c_first==s_medi or c_first==s_fina then
+            setprop(first,a_state,s_isol)
+          else
+            warning(first,"isol")
+            setprop(first,a_state,s_error)
+          end
+          first=nil
+        end
+      end
+    else
+      if last then
+        if c_last==s_medi or c_last==s_fina then
+          setprop(last,a_state,s_fina)
+        else
+          warning(last,"fina")
+          setprop(last,a_state,s_error)
+        end
+        first,last=nil,nil
+      elseif first then
+        if c_first==s_medi or c_first==s_fina then
+          setprop(first,a_state,s_isol)
+        else
+          warning(first,"isol")
+          setprop(first,a_state,s_error)
+        end
+        first=nil
+      end
+      if id==math_code then 
+        current=end_of_math(current)
+      end
+    end
+    current=getnext(current)
+  end
+  if last then
+    if c_last==s_medi or c_last==s_fina then
+      setprop(last,a_state,s_fina)
+    else
+      warning(last,"fina")
+      setprop(last,a_state,s_error)
+    end
+  elseif first then
+    if c_first==s_medi or c_first==s_fina then
+      setprop(first,a_state,s_isol)
+    else
+      warning(first,"isol")
+      setprop(first,a_state,s_error)
+    end
+  end
+  return head,done
+end
+methods.syrc=methods.arab
+methods.mand=methods.arab
+methods.nko=methods.arab
+directives.register("otf.analyze.useunicodemarks",function(v)
+  analyzers.useunicodemarks=v
+end)
+
+end --- [luaotfload, fontloader-2017-02-11.lua scope for “font-ota”] ---
+
+
+do  --- [luaotfload, fontloader-2017-02-11.lua scope for “font-ots” 7e1e55f9f728474372665e4a64a43f5a] ---
+
+if not modules then modules={} end modules ['font-ots']={ 
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files",
+}
+local type,next,tonumber=type,next,tonumber
+local random=math.random
+local formatters=string.formatters
+local insert=table.insert
+local logs,trackers,nodes,attributes=logs,trackers,nodes,attributes
+local registertracker=trackers.register
+local registerdirective=directives.register
+local fonts=fonts
+local otf=fonts.handlers.otf
+local trace_lookups=false registertracker("otf.lookups",function(v) trace_lookups=v end)
+local trace_singles=false registertracker("otf.singles",function(v) trace_singles=v end)
+local trace_multiples=false registertracker("otf.multiples",function(v) trace_multiples=v end)
+local trace_alternatives=false registertracker("otf.alternatives",function(v) trace_alternatives=v end)
+local trace_ligatures=false registertracker("otf.ligatures",function(v) trace_ligatures=v end)
+local trace_contexts=false registertracker("otf.contexts",function(v) trace_contexts=v end)
+local trace_marks=false registertracker("otf.marks",function(v) trace_marks=v end)
+local trace_kerns=false registertracker("otf.kerns",function(v) trace_kerns=v end)
+local trace_cursive=false registertracker("otf.cursive",function(v) trace_cursive=v end)
+local trace_preparing=false registertracker("otf.preparing",function(v) trace_preparing=v end)
+local trace_bugs=false registertracker("otf.bugs",function(v) trace_bugs=v end)
+local trace_details=false registertracker("otf.details",function(v) trace_details=v end)
+local trace_steps=false registertracker("otf.steps",function(v) trace_steps=v end)
+local trace_skips=false registertracker("otf.skips",function(v) trace_skips=v end)
+local trace_directions=false registertracker("otf.directions",function(v) trace_directions=v end)
+local trace_plugins=false registertracker("otf.plugins",function(v) trace_plugins=v end)
+local trace_kernruns=false registertracker("otf.kernruns",function(v) trace_kernruns=v end)
+local trace_discruns=false registertracker("otf.discruns",function(v) trace_discruns=v end)
+local trace_compruns=false registertracker("otf.compruns",function(v) trace_compruns=v end)
+local trace_testruns=false registertracker("otf.testruns",function(v) trace_testruns=v end)
+local optimizekerns=true
+local alwaysdisc=true  registerdirective("otf.alwaysdisc",function(v) alwaysdisc=v end)
+local report_direct=logs.reporter("fonts","otf direct")
+local report_subchain=logs.reporter("fonts","otf subchain")
+local report_chain=logs.reporter("fonts","otf chain")
+local report_process=logs.reporter("fonts","otf process")
+local report_warning=logs.reporter("fonts","otf warning")
+local report_run=logs.reporter("fonts","otf run")
+registertracker("otf.replacements","otf.singles,otf.multiples,otf.alternatives,otf.ligatures")
+registertracker("otf.positions","otf.marks,otf.kerns,otf.cursive")
+registertracker("otf.actions","otf.replacements,otf.positions")
+registertracker("otf.injections","nodes.injections")
+registertracker("*otf.sample","otf.steps,otf.actions,otf.analyzing")
+local nuts=nodes.nuts
+local tonode=nuts.tonode
+local tonut=nuts.tonut
+local getfield=nuts.getfield
+local setfield=nuts.setfield
+local getnext=nuts.getnext
+local setnext=nuts.setnext
+local getprev=nuts.getprev
+local setprev=nuts.setprev
+local getboth=nuts.getboth
+local setboth=nuts.setboth
+local getid=nuts.getid
+local getattr=nuts.getattr
+local setattr=nuts.setattr
+local getprop=nuts.getprop
+local setprop=nuts.setprop
+local getfont=nuts.getfont
+local getsubtype=nuts.getsubtype
+local setsubtype=nuts.setsubtype
+local getchar=nuts.getchar
+local setchar=nuts.setchar
+local getdisc=nuts.getdisc
+local setdisc=nuts.setdisc
+local setlink=nuts.setlink
+local ischar=nuts.is_char
+local insert_node_after=nuts.insert_after
+local copy_node=nuts.copy
+local copy_node_list=nuts.copy_list
+local find_node_tail=nuts.tail
+local flush_node_list=nuts.flush_list
+local flush_node=nuts.flush_node
+local end_of_math=nuts.end_of_math
+local traverse_nodes=nuts.traverse
+local traverse_id=nuts.traverse_id
+local remove_node=nuts.remove
+local setmetatableindex=table.setmetatableindex
+local zwnj=0x200C
+local zwj=0x200D
+local wildcard="*"
+local default="dflt"
+local nodecodes=nodes.nodecodes
+local glyphcodes=nodes.glyphcodes
+local disccodes=nodes.disccodes
+local glyph_code=nodecodes.glyph
+local glue_code=nodecodes.glue
+local disc_code=nodecodes.disc
+local math_code=nodecodes.math
+local dir_code=nodecodes.dir
+local localpar_code=nodecodes.localpar
+local discretionary_code=disccodes.discretionary
+local ligature_code=glyphcodes.ligature
+local privateattribute=attributes.private
+local a_state=privateattribute('state')
+local injections=nodes.injections
+local setmark=injections.setmark
+local setcursive=injections.setcursive
+local setkern=injections.setkern
+local setpair=injections.setpair
+local resetinjection=injections.reset
+local copyinjection=injections.copy
+local setligaindex=injections.setligaindex
+local getligaindex=injections.getligaindex
+local cursonce=true
+local fonthashes=fonts.hashes
+local fontdata=fonthashes.identifiers
+local fontfeatures=fonthashes.features
+local otffeatures=fonts.constructors.features.otf
+local registerotffeature=otffeatures.register
+local onetimemessage=fonts.loggers.onetimemessage or function() end
+local getrandom=utilities and utilities.randomizer and utilities.randomizer.get
+otf.defaultnodealternate="none"
+local tfmdata=false
+local characters=false
+local descriptions=false
+local marks=false
+local currentfont=false
+local factor=0
+local threshold=0
+local checkmarks=false
+local sweepnode=nil
+local sweepprev=nil
+local sweepnext=nil
+local sweephead={}
+local notmatchpre={}
+local notmatchpost={}
+local notmatchreplace={}
+local handlers={}
+local isspace=injections.isspace
+local getthreshold=injections.getthreshold
+local checkstep=(nodes and nodes.tracers and nodes.tracers.steppers.check)  or function() end
+local registerstep=(nodes and nodes.tracers and nodes.tracers.steppers.register) or function() end
+local registermessage=(nodes and nodes.tracers and nodes.tracers.steppers.message) or function() end
+local function checkdisccontent(d)
+  local pre,post,replace=getdisc(d)
+  if pre   then for n in traverse_id(glue_code,pre)   do print("pre",nodes.idstostring(pre))   break end end
+  if post  then for n in traverse_id(glue_code,post)  do print("pos",nodes.idstostring(post))  break end end
+  if replace then for n in traverse_id(glue_code,replace) do print("rep",nodes.idstostring(replace)) break end end
+end
+local function logprocess(...)
+  if trace_steps then
+    registermessage(...)
+  end
+  report_direct(...)
+end
+local function logwarning(...)
+  report_direct(...)
+end
+local f_unicode=formatters["%U"]
+local f_uniname=formatters["%U (%s)"]
+local f_unilist=formatters["% t (% t)"]
+local function gref(n) 
+  if type(n)=="number" then
+    local description=descriptions[n]
+    local name=description and description.name
+    if name then
+      return f_uniname(n,name)
+    else
+      return f_unicode(n)
+    end
+  elseif n then
+    local num,nam={},{}
+    for i=1,#n do
+      local ni=n[i]
+      if tonumber(ni) then 
+        local di=descriptions[ni]
+        num[i]=f_unicode(ni)
+        nam[i]=di and di.name or "-"
+      end
+    end
+    return f_unilist(num,nam)
+  else
+    return "<error in node mode tracing>"
+  end
+end
+local function cref(dataset,sequence,index)
+  if not dataset then
+    return "no valid dataset"
+  elseif index then
+    return formatters["feature %a, type %a, chain lookup %a, index %a"](dataset[4],sequence.type,sequence.name,index)
+  else
+    return formatters["feature %a, type %a, chain lookup %a"](dataset[4],sequence.type,sequence.name)
+  end
+end
+local function pref(dataset,sequence)
+  return formatters["feature %a, type %a, lookup %a"](dataset[4],sequence.type,sequence.name)
+end
+local function mref(rlmode)
+  if not rlmode or rlmode==0 then
+    return "---"
+  elseif rlmode==-1 or rlmode=="+TRT" then
+    return "r2l"
+  else
+    return "l2r"
+  end
+end
+local function copy_glyph(g) 
+  local components=getfield(g,"components")
+  if components then
+    setfield(g,"components")
+    local n=copy_node(g)
+    copyinjection(n,g) 
+    setfield(g,"components",components)
+    return n
+  else
+    local n=copy_node(g)
+    copyinjection(n,g) 
+    return n
+  end
+end
+local function flattendisk(head,disc)
+  local pre,post,replace,pretail,posttail,replacetail=getdisc(disc,true)
+  local prev,next=getboth(disc)
+  local ishead=head==disc
+  setdisc(disc)
+  flush_node(disc)
+  if pre then
+    flush_node_list(pre)
+  end
+  if post then
+    flush_node_list(post)
+  end
+  if ishead then
+    if replace then
+      if next then
+        setlink(replacetail,next)
+      end
+      return replace,replace
+    elseif next then
+      return next,next
+    else
+      return 
+    end
+  else
+    if replace then
+      if next then
+        setlink(replacetail,next)
+      end
+      setlink(prev,replace)
+      return head,replace
+    else
+      setlink(prev,next) 
+      return head,next
+    end
+  end
+end
+local function appenddisc(disc,list)
+  local pre,post,replace,pretail,posttail,replacetail=getdisc(disc,true)
+  local posthead=list
+  local replacehead=copy_node_list(list)
+  if post then
+    setlink(posttail,posthead)
+  else
+    post=phead
+  end
+  if replace then
+    setlink(replacetail,replacehead)
+  else
+    replace=rhead
+  end
+  setdisc(disc,pre,post,replace)
+end
+local function markstoligature(head,start,stop,char)
+  if start==stop and getchar(start)==char then
+    return head,start
+  else
+    local prev=getprev(start)
+    local next=getnext(stop)
+    setprev(start)
+    setnext(stop)
+    local base=copy_glyph(start)
+    if head==start then
+      head=base
+    end
+    resetinjection(base)
+    setchar(base,char)
+    setsubtype(base,ligature_code)
+    setfield(base,"components",start)
+    setlink(prev,base)
+    setlink(base,next)
+    return head,base
+  end
+end
+local function getcomponentindex(start) 
+  if getid(start)~=glyph_code then 
+    return 0
+  elseif getsubtype(start)==ligature_code then
+    local i=0
+    local components=getfield(start,"components")
+    while components do
+      i=i+getcomponentindex(components)
+      components=getnext(components)
+    end
+    return i
+  elseif not marks[getchar(start)] then
+    return 1
+  else
+    return 0
+  end
+end
+local a_noligature=attributes.private("noligature")
+local function toligature(head,start,stop,char,dataset,sequence,markflag,discfound) 
+  if getattr(start,a_noligature)==1 then
+    return head,start
+  end
+  if start==stop and getchar(start)==char then
+    resetinjection(start)
+    setchar(start,char)
+    return head,start
+  end
+  local components=getfield(start,"components")
+  if components then
+  end
+  local prev=getprev(start)
+  local next=getnext(stop)
+  local comp=start
+  setprev(start)
+  setnext(stop)
+  local base=copy_glyph(start)
+  if start==head then
+    head=base
+  end
+  resetinjection(base)
+  setchar(base,char)
+  setsubtype(base,ligature_code)
+  setfield(base,"components",comp) 
+  if prev then
+    setnext(prev,base)
+  end
+  if next then
+    setprev(next,base)
+  end
+  setboth(base,prev,next)
+  if not discfound then
+    local deletemarks=markflag~="mark"
+    local components=start
+    local baseindex=0
+    local componentindex=0
+    local head=base
+    local current=base
+    while start do
+      local char=getchar(start)
+      if not marks[char] then
+        baseindex=baseindex+componentindex
+        componentindex=getcomponentindex(start)
+      elseif not deletemarks then 
+        setligaindex(start,baseindex+getligaindex(start,componentindex))
+        if trace_marks then
+          logwarning("%s: keep mark %s, gets index %s",pref(dataset,sequence),gref(char),getligaindex(start))
+        end
+        local n=copy_node(start)
+        copyinjection(n,start)
+        head,current=insert_node_after(head,current,n) 
+      elseif trace_marks then
+        logwarning("%s: delete mark %s",pref(dataset,sequence),gref(char))
+      end
+      start=getnext(start)
+    end
+    local start=getnext(current)
+    while start do
+      local char=ischar(start)
+      if char then
+        if marks[char] then
+          setligaindex(start,baseindex+getligaindex(start,componentindex))
+          if trace_marks then
+            logwarning("%s: set mark %s, gets index %s",pref(dataset,sequence),gref(char),getligaindex(start))
+          end
+          start=getnext(start)
+        else
+          break
+        end
+      else
+        break
+      end
+    end
+  else
+    local discprev,discnext=getboth(discfound)
+    if discprev and discnext then
+      local pre,post,replace,pretail,posttail,replacetail=getdisc(discfound,true)
+      if not replace then 
+        local prev=getprev(base)
+        local current=comp
+        local previous=nil
+        local copied=nil
+        while current do
+          if getid(current)==glyph_code then
+            local n=copy_node(current)
+            if copied then
+              setlink(previous,n)
+            else
+              copied=n
+            end
+            previous=n
+          end
+          current=getnext(current)
+        end
+        setprev(discnext) 
+        setnext(discprev) 
+        if pre then
+          setlink(discprev,pre)
+        end
+        pre=comp
+        if post then
+          setlink(posttail,discnext)
+          setprev(post)
+        else
+          post=discnext
+        end
+        setlink(prev,discfound)
+        setlink(discfound,next)
+        setboth(base)
+        setfield(base,"components",copied)
+        setdisc(discfound,pre,post,base) 
+        base=prev 
+      end
+    end
+  end
+  return head,base
+end
+local function multiple_glyphs(head,start,multiple,ignoremarks,what)
+  local nofmultiples=#multiple
+  if nofmultiples>0 then
+    resetinjection(start)
+    setchar(start,multiple[1])
+    if nofmultiples>1 then
+      local sn=getnext(start)
+      for k=2,nofmultiples do
+        local n=copy_node(start) 
+        resetinjection(n)
+        setchar(n,multiple[k])
+        insert_node_after(head,start,n)
+        start=n
+      end
+      if what==true then
+      elseif what>1 then
+        local m=multiple[nofmultiples]
+        for i=2,what do
+          local n=copy_node(start) 
+          resetinjection(n)
+          setchar(n,m)
+          insert_node_after(head,start,n)
+          start=n
+        end
+      end
+    end
+    return head,start,true
+  else
+    if trace_multiples then
+      logprocess("no multiple for %s",gref(getchar(start)))
+    end
+    return head,start,false
+  end
+end
+local function get_alternative_glyph(start,alternatives,value)
+  local n=#alternatives
+  if value=="random" then
+    local r=getrandom and getrandom("glyph",1,n) or random(1,n)
+    return alternatives[r],trace_alternatives and formatters["value %a, taking %a"](value,r)
+  elseif value=="first" then
+    return alternatives[1],trace_alternatives and formatters["value %a, taking %a"](value,1)
+  elseif value=="last" then
+    return alternatives[n],trace_alternatives and formatters["value %a, taking %a"](value,n)
+  end
+  value=value==true and 1 or tonumber(value)
+  if type(value)~="number" then
+    return alternatives[1],trace_alternatives and formatters["invalid value %s, taking %a"](value,1)
+  end
+  if value>n then
+    local defaultalt=otf.defaultnodealternate
+    if defaultalt=="first" then
+      return alternatives[n],trace_alternatives and formatters["invalid value %s, taking %a"](value,1)
+    elseif defaultalt=="last" then
+      return alternatives[1],trace_alternatives and formatters["invalid value %s, taking %a"](value,n)
+    else
+      return false,trace_alternatives and formatters["invalid value %a, %s"](value,"out of range")
+    end
+  elseif value==0 then
+    return getchar(start),trace_alternatives and formatters["invalid value %a, %s"](value,"no change")
+  elseif value<1 then
+    return alternatives[1],trace_alternatives and formatters["invalid value %a, taking %a"](value,1)
+  else
+    return alternatives[value],trace_alternatives and formatters["value %a, taking %a"](value,value)
+  end
+end
+function handlers.gsub_single(head,start,dataset,sequence,replacement)
+  if trace_singles then
+    logprocess("%s: replacing %s by single %s",pref(dataset,sequence),gref(getchar(start)),gref(replacement))
+  end
+  resetinjection(start)
+  setchar(start,replacement)
+  return head,start,true
+end
+function handlers.gsub_alternate(head,start,dataset,sequence,alternative)
+  local kind=dataset[4]
+  local what=dataset[1]
+  local value=what==true and tfmdata.shared.features[kind] or what
+  local choice,comment=get_alternative_glyph(start,alternative,value)
+  if choice then
+    if trace_alternatives then
+      logprocess("%s: replacing %s by alternative %a to %s, %s",pref(dataset,sequence),gref(getchar(start)),gref(choice),comment)
+    end
+    resetinjection(start)
+    setchar(start,choice)
+  else
+    if trace_alternatives then
+      logwarning("%s: no variant %a for %s, %s",pref(dataset,sequence),value,gref(getchar(start)),comment)
+    end
+  end
+  return head,start,true
+end
+function handlers.gsub_multiple(head,start,dataset,sequence,multiple)
+  if trace_multiples then
+    logprocess("%s: replacing %s by multiple %s",pref(dataset,sequence),gref(getchar(start)),gref(multiple))
+  end
+  return multiple_glyphs(head,start,multiple,sequence.flags[1],dataset[1])
+end
+function handlers.gsub_ligature(head,start,dataset,sequence,ligature)
+  local current=getnext(start)
+  if not current then
+    return head,start,false,nil
+  end
+  local stop=nil
+  local startchar=getchar(start)
+  if marks[startchar] then
+    while current do
+      local char=ischar(current,currentfont)
+      if char then
+        local lg=ligature[char]
+        if lg then
+          stop=current
+          ligature=lg
+          current=getnext(current)
+        else
+          break
+        end
+      else
+        break
+      end
+    end
+    if stop then
+      local lig=ligature.ligature
+      if lig then
+        if trace_ligatures then
+          local stopchar=getchar(stop)
+          head,start=markstoligature(head,start,stop,lig)
+          logprocess("%s: replacing %s upto %s by ligature %s case 1",pref(dataset,sequence),gref(startchar),gref(stopchar),gref(getchar(start)))
+        else
+          head,start=markstoligature(head,start,stop,lig)
+        end
+        return head,start,true,false
+      else
+      end
+    end
+  else
+    local skipmark=sequence.flags[1]
+    local discfound=false
+    local lastdisc=nil
+    while current do
+      local char,id=ischar(current,currentfont)
+      if char then
+        if skipmark and marks[char] then
+          current=getnext(current)
+        else 
+          local lg=ligature[char] 
+          if lg then
+            if not discfound and lastdisc then
+              discfound=lastdisc
+              lastdisc=nil
+            end
+            stop=current 
+            ligature=lg
+            current=getnext(current)
+          else
+            break
+          end
+        end
+      elseif char==false then
+        break
+      elseif id==disc_code then
+        local replace=getfield(current,"replace")
+        if replace then
+          while replace do
+            local char,id=ischar(replace,currentfont)
+            if char then
+              local lg=ligature[char] 
+              if lg then
+                ligature=lg
+                replace=getnext(replace)
+              else
+                return head,start,false,false
+              end
+            else
+              return head,start,false,false
+            end
+          end
+          stop=current
+        end
+        lastdisc=current
+        current=getnext(current)
+      else
+        break
+      end
+    end
+    local lig=ligature.ligature
+    if lig then
+      if stop then
+        if trace_ligatures then
+          local stopchar=getchar(stop)
+          head,start=toligature(head,start,stop,lig,dataset,sequence,skipmark,discfound)
+          logprocess("%s: replacing %s upto %s by ligature %s case 2",pref(dataset,sequence),gref(startchar),gref(stopchar),gref(lig))
+        else
+          head,start=toligature(head,start,stop,lig,dataset,sequence,skipmark,discfound)
+        end
+      else
+        resetinjection(start)
+        setchar(start,lig)
+        if trace_ligatures then
+          logprocess("%s: replacing %s by (no real) ligature %s case 3",pref(dataset,sequence),gref(startchar),gref(lig))
+        end
+      end
+      return head,start,true,discfound
+    else
+    end
+  end
+  return head,start,false,discfound
+end
+function handlers.gpos_single(head,start,dataset,sequence,kerns,rlmode,step,i,injection)
+  local startchar=getchar(start)
+  if step.format=="pair" then
+    local dx,dy,w,h=setpair(start,factor,rlmode,sequence.flags[4],kerns,injection)
+    if trace_kerns then
+      logprocess("%s: shifting single %s by (%p,%p) and correction (%p,%p)",pref(dataset,sequence),gref(startchar),dx,dy,w,h)
+    end
+  else
+    local k=setkern(start,factor,rlmode,kerns,injection)
+    if trace_kerns then
+      logprocess("%s: shifting single %s by %p",pref(dataset,sequence),gref(startchar),k)
+    end
+  end
+  return head,start,false
+end
+function handlers.gpos_pair(head,start,dataset,sequence,kerns,rlmode,step,i,injection)
+  local snext=getnext(start)
+  if not snext then
+    return head,start,false
+  else
+    local prev=start
+    local done=false
+    while snext do
+      local nextchar=ischar(snext,currentfont)
+      if nextchar then
+        local krn=kerns[nextchar]
+        if not krn and marks[nextchar] then
+          prev=snext
+          snext=getnext(snext)
+        elseif not krn then
+          break
+        elseif step.format=="pair" then
+          local a,b=krn[1],krn[2]
+          if optimizekerns then
+            if not b and a[1]==0 and a[2]==0 and a[4]==0 then
+              local k=setkern(snext,factor,rlmode,a[3],injection)
+              if trace_kerns then
+                logprocess("%s: shifting single %s by %p",pref(dataset,sequence),gref(nextchar),k)
+              end
+              done=true
+              break
+            end
+          end
+          if a and #a>0 then
+            local x,y,w,h=setpair(start,factor,rlmode,sequence.flags[4],a,injection)
+            if trace_kerns then
+              local startchar=getchar(start)
+              logprocess("%s: shifting first of pair %s and %s by (%p,%p) and correction (%p,%p) as %s",pref(dataset,sequence),gref(startchar),gref(nextchar),x,y,w,h,injection or "injections")
+            end
+          end
+          if b and #b>0 then
+            local x,y,w,h=setpair(snext,factor,rlmode,sequence.flags[4],b,injection)
+            if trace_kerns then
+              local startchar=getchar(snext)
+              logprocess("%s: shifting second of pair %s and %s by (%p,%p) and correction (%p,%p) as %s",pref(dataset,sequence),gref(startchar),gref(nextchar),x,y,w,h,injection or "injections")
+            end
+          end
+          done=true
+          break
+        elseif krn~=0 then
+          local k=setkern(snext,factor,rlmode,krn,injection)
+          if trace_kerns then
+            logprocess("%s: inserting kern %p between %s and %s as %s",pref(dataset,sequence),k,gref(getchar(prev)),gref(nextchar),injection or "injections")
+          end
+          done=true
+          break
+        else 
+          break
+        end
+      else
+        break
+      end
+    end
+    return head,start,done
+  end
+end
+function handlers.gpos_mark2base(head,start,dataset,sequence,markanchors,rlmode)
+  local markchar=getchar(start)
+  if marks[markchar] then
+    local base=getprev(start) 
+    if base then
+      local basechar=ischar(base,currentfont)
+      if basechar then
+        if marks[basechar] then
+          while base do
+            base=getprev(base)
+            if base then
+              basechar=ischar(base,currentfont)
+              if basechar then
+                if not marks[basechar] then
+                  break
+                end
+              else
+                if trace_bugs then
+                  logwarning("%s: no base for mark %s, case %i",pref(dataset,sequence),gref(markchar),1)
+                end
+                return head,start,false
+              end
+            else
+              if trace_bugs then
+                logwarning("%s: no base for mark %s, case %i",pref(dataset,sequence),gref(markchar),2)
+              end
+              return head,start,false
+            end
+          end
+        end
+        local ba=markanchors[1][basechar]
+        if ba then
+          local ma=markanchors[2]
+          local dx,dy,bound=setmark(start,base,factor,rlmode,ba,ma,characters[basechar],false,checkmarks)
+          if trace_marks then
+            logprocess("%s, anchor %s, bound %s: anchoring mark %s to basechar %s => (%p,%p)",
+              pref(dataset,sequence),anchor,bound,gref(markchar),gref(basechar),dx,dy)
+          end
+          return head,start,true
+        end
+      elseif trace_bugs then
+        logwarning("%s: nothing preceding, case %i",pref(dataset,sequence),1)
+      end
+    elseif trace_bugs then
+      logwarning("%s: nothing preceding, case %i",pref(dataset,sequence),2)
+    end
+  elseif trace_bugs then
+    logwarning("%s: mark %s is no mark",pref(dataset,sequence),gref(markchar))
+  end
+  return head,start,false
+end
+function handlers.gpos_mark2ligature(head,start,dataset,sequence,markanchors,rlmode)
+  local markchar=getchar(start)
+  if marks[markchar] then
+    local base=getprev(start) 
+    if base then
+      local basechar=ischar(base,currentfont)
+      if basechar then
+        if marks[basechar] then
+          while base do
+            base=getprev(base)
+            if base then
+              basechar=ischar(base,currentfont)
+              if basechar then
+                if not marks[basechar] then
+                  break
+                end
+              else
+                if trace_bugs then
+                  logwarning("%s: no base for mark %s, case %i",pref(dataset,sequence),gref(markchar),1)
+                end
+                return head,start,false
+              end
+            else
+              if trace_bugs then
+                logwarning("%s: no base for mark %s, case %i",pref(dataset,sequence),gref(markchar),2)
+              end
+              return head,start,false
+            end
+          end
+        end
+        local ba=markanchors[1][basechar]
+        if ba then
+          local ma=markanchors[2]
+          if ma then
+            local index=getligaindex(start)
+            ba=ba[index]
+            if ba then
+              local dx,dy,bound=setmark(start,base,factor,rlmode,ba,ma,characters[basechar],false,checkmarks)
+              if trace_marks then
+                logprocess("%s, anchor %s, index %s, bound %s: anchoring mark %s to baselig %s at index %s => (%p,%p)",
+                  pref(dataset,sequence),anchor,index,bound,gref(markchar),gref(basechar),index,dx,dy)
+              end
+              return head,start,true
+            else
+              if trace_bugs then
+                logwarning("%s: no matching anchors for mark %s and baselig %s with index %a",pref(dataset,sequence),gref(markchar),gref(basechar),index)
+              end
+            end
+          end
+        elseif trace_bugs then
+          onetimemessage(currentfont,basechar,"no base anchors",report_fonts)
+        end
+      elseif trace_bugs then
+        logwarning("%s: prev node is no char, case %i",pref(dataset,sequence),1)
+      end
+    elseif trace_bugs then
+      logwarning("%s: prev node is no char, case %i",pref(dataset,sequence),2)
+    end
+  elseif trace_bugs then
+    logwarning("%s: mark %s is no mark",pref(dataset,sequence),gref(markchar))
+  end
+  return head,start,false
+end
+function handlers.gpos_mark2mark(head,start,dataset,sequence,markanchors,rlmode)
+  local markchar=getchar(start)
+  if marks[markchar] then
+    local base=getprev(start) 
+    local slc=getligaindex(start)
+    if slc then 
+      while base do
+        local blc=getligaindex(base)
+        if blc and blc~=slc then
+          base=getprev(base)
+        else
+          break
+        end
+      end
+    end
+    if base then
+      local basechar=ischar(base,currentfont)
+      if basechar then 
+        local ba=markanchors[1][basechar] 
+        if ba then
+          local ma=markanchors[2]
+          local dx,dy,bound=setmark(start,base,factor,rlmode,ba,ma,characters[basechar],true,checkmarks)
+          if trace_marks then
+            logprocess("%s, anchor %s, bound %s: anchoring mark %s to basemark %s => (%p,%p)",
+              pref(dataset,sequence),anchor,bound,gref(markchar),gref(basechar),dx,dy)
+          end
+          return head,start,true
+        end
+      end
+    end
+  elseif trace_bugs then
+    logwarning("%s: mark %s is no mark",pref(dataset,sequence),gref(markchar))
+  end
+  return head,start,false
+end
+function handlers.gpos_cursive(head,start,dataset,sequence,exitanchors,rlmode,step,i) 
+  local done=false
+  local startchar=getchar(start)
+  if marks[startchar] then
+    if trace_cursive then
+      logprocess("%s: ignoring cursive for mark %s",pref(dataset,sequence),gref(startchar))
+    end
+  else
+    local nxt=getnext(start)
+    while not done and nxt do
+      local nextchar=ischar(nxt,currentfont)
+      if not nextchar then
+        break
+      elseif marks[nextchar] then
+        nxt=getnext(nxt)
+      else
+        local exit=exitanchors[3]
+        if exit then
+          local entry=exitanchors[1][nextchar]
+          if entry then
+            entry=entry[2]
+            if entry then
+              local dx,dy,bound=setcursive(start,nxt,factor,rlmode,exit,entry,characters[startchar],characters[nextchar])
+              if trace_cursive then
+                logprocess("%s: moving %s to %s cursive (%p,%p) using anchor %s and bound %s in %s mode",pref(dataset,sequence),gref(startchar),gref(nextchar),dx,dy,anchor,bound,mref(rlmode))
+              end
+              done=true
+            end
+          end
+        end
+        break
+      end
+    end
+  end
+  return head,start,done
+end
+local chainprocs={}
+local function logprocess(...)
+  if trace_steps then
+    registermessage(...)
+  end
+  report_subchain(...)
+end
+local logwarning=report_subchain
+local function logprocess(...)
+  if trace_steps then
+    registermessage(...)
+  end
+  report_chain(...)
+end
+local logwarning=report_chain
+local function reversesub(head,start,stop,dataset,sequence,replacements,rlmode)
+  local char=getchar(start)
+  local replacement=replacements[char]
+  if replacement then
+    if trace_singles then
+      logprocess("%s: single reverse replacement of %s by %s",cref(dataset,sequence),gref(char),gref(replacement))
+    end
+    resetinjection(start)
+    setchar(start,replacement)
+    return head,start,true
+  else
+    return head,start,false
+  end
+end
+chainprocs.reversesub=reversesub
+local function reportmoresteps(dataset,sequence)
+  logwarning("%s: more than 1 step",cref(dataset,sequence))
+end
+function chainprocs.gsub_single(head,start,stop,dataset,sequence,currentlookup,chainindex)
+  local steps=currentlookup.steps
+  local nofsteps=currentlookup.nofsteps
+  if nofsteps>1 then
+    reportmoresteps(dataset,sequence)
+  end
+  local current=start
+  while current do
+    local currentchar=ischar(current)
+    if currentchar then
+      local replacement=steps[1].coverage[currentchar]
+      if not replacement or replacement=="" then
+        if trace_bugs then
+          logwarning("%s: no single for %s",cref(dataset,sequence,chainindex),gref(currentchar))
+        end
+      else
+        if trace_singles then
+          logprocess("%s: replacing single %s by %s",cref(dataset,sequence,chainindex),gref(currentchar),gref(replacement))
+        end
+        resetinjection(current)
+        setchar(current,replacement)
+      end
+      return head,start,true
+    elseif currentchar==false then
+      break
+    elseif current==stop then
+      break
+    else
+      current=getnext(current)
+    end
+  end
+  return head,start,false
+end
+function chainprocs.gsub_multiple(head,start,stop,dataset,sequence,currentlookup)
+  local steps=currentlookup.steps
+  local nofsteps=currentlookup.nofsteps
+  if nofsteps>1 then
+    reportmoresteps(dataset,sequence)
+  end
+  local startchar=getchar(start)
+  local replacement=steps[1].coverage[startchar]
+  if not replacement or replacement=="" then
+    if trace_bugs then
+      logwarning("%s: no multiple for %s",cref(dataset,sequence),gref(startchar))
+    end
+  else
+    if trace_multiples then
+      logprocess("%s: replacing %s by multiple characters %s",cref(dataset,sequence),gref(startchar),gref(replacement))
+    end
+    return multiple_glyphs(head,start,replacement,sequence.flags[1],dataset[1])
+  end
+  return head,start,false
+end
+function chainprocs.gsub_alternate(head,start,stop,dataset,sequence,currentlookup)
+  local steps=currentlookup.steps
+  local nofsteps=currentlookup.nofsteps
+  if nofsteps>1 then
+    reportmoresteps(dataset,sequence)
+  end
+  local kind=dataset[4]
+  local what=dataset[1]
+  local value=what==true and tfmdata.shared.features[kind] or what 
+  local current=start
+  while current do
+    local currentchar=ischar(current)
+    if currentchar then
+      local alternatives=steps[1].coverage[currentchar]
+      if alternatives then
+        local choice,comment=get_alternative_glyph(current,alternatives,value)
+        if choice then
+          if trace_alternatives then
+            logprocess("%s: replacing %s by alternative %a to %s, %s",cref(dataset,sequence),gref(char),choice,gref(choice),comment)
+          end
+          resetinjection(start)
+          setchar(start,choice)
+        else
+          if trace_alternatives then
+            logwarning("%s: no variant %a for %s, %s",cref(dataset,sequence),value,gref(char),comment)
+          end
+        end
+      end
+      return head,start,true
+    elseif currentchar==false then
+      break
+    elseif current==stop then
+      break
+    else
+      current=getnext(current)
+    end
+  end
+  return head,start,false
+end
+function chainprocs.gsub_ligature(head,start,stop,dataset,sequence,currentlookup,chainindex)
+  local steps=currentlookup.steps
+  local nofsteps=currentlookup.nofsteps
+  if nofsteps>1 then
+    reportmoresteps(dataset,sequence)
+  end
+  local startchar=getchar(start)
+  local ligatures=steps[1].coverage[startchar]
+  if not ligatures then
+    if trace_bugs then
+      logwarning("%s: no ligatures starting with %s",cref(dataset,sequence,chainindex),gref(startchar))
+    end
+  else
+    local current=getnext(start)
+    local discfound=false
+    local last=stop
+    local nofreplacements=1
+    local skipmark=currentlookup.flags[1] 
+    while current do
+      local id=getid(current)
+      if id==disc_code then
+        if not discfound then
+          discfound=current
+        end
+        if current==stop then
+          break 
+        else
+          current=getnext(current)
+        end
+      else
+        local schar=getchar(current)
+        if skipmark and marks[schar] then
+            current=getnext(current)
+        else
+          local lg=ligatures[schar]
+          if lg then
+            ligatures=lg
+            last=current
+            nofreplacements=nofreplacements+1
+            if current==stop then
+              break
+            else
+              current=getnext(current)
+            end
+          else
+            break
+          end
+        end
+      end
+    end
+    local ligature=ligatures.ligature
+    if ligature then
+      if chainindex then
+        stop=last
+      end
+      if trace_ligatures then
+        if start==stop then
+          logprocess("%s: replacing character %s by ligature %s case 3",cref(dataset,sequence,chainindex),gref(startchar),gref(ligature))
+        else
+          logprocess("%s: replacing character %s upto %s by ligature %s case 4",cref(dataset,sequence,chainindex),gref(startchar),gref(getchar(stop)),gref(ligature))
+        end
+      end
+      head,start=toligature(head,start,stop,ligature,dataset,sequence,skipmark,discfound)
+      return head,start,true,nofreplacements,discfound
+    elseif trace_bugs then
+      if start==stop then
+        logwarning("%s: replacing character %s by ligature fails",cref(dataset,sequence,chainindex),gref(startchar))
+      else
+        logwarning("%s: replacing character %s upto %s by ligature fails",cref(dataset,sequence,chainindex),gref(startchar),gref(getchar(stop)))
+      end
+    end
+  end
+  return head,start,false,0,false
+end
+function chainprocs.gpos_single(head,start,stop,dataset,sequence,currentlookup,rlmode,chainindex)
+  local steps=currentlookup.steps
+  local nofsteps=currentlookup.nofsteps
+  if nofsteps>1 then
+    reportmoresteps(dataset,sequence)
+  end
+  local startchar=getchar(start)
+  local step=steps[1]
+  local kerns=step.coverage[startchar]
+  if not kerns then
+  elseif step.format=="pair" then
+    local dx,dy,w,h=setpair(start,factor,rlmode,sequence.flags[4],kerns) 
+    if trace_kerns then
+      logprocess("%s: shifting single %s by (%p,%p) and correction (%p,%p)",cref(dataset,sequence),gref(startchar),dx,dy,w,h)
+    end
+  else 
+    local k=setkern(start,factor,rlmode,kerns,injection)
+    if trace_kerns then
+      logprocess("%s: shifting single %s by %p",cref(dataset,sequence),gref(startchar),k)
+    end
+  end
+  return head,start,false
+end
+function chainprocs.gpos_pair(head,start,stop,dataset,sequence,currentlookup,rlmode,chainindex) 
+  local steps=currentlookup.steps
+  local nofsteps=currentlookup.nofsteps
+  if nofsteps>1 then
+    reportmoresteps(dataset,sequence)
+  end
+  local snext=getnext(start)
+  if snext then
+    local startchar=getchar(start)
+    local step=steps[1]
+    local kerns=step.coverage[startchar] 
+    if kerns then
+      local prev=start
+      local done=false
+      while snext do
+        local nextchar=ischar(snext,currentfont)
+        if not nextchar then
+          break
+        end
+        local krn=kerns[nextchar]
+        if not krn and marks[nextchar] then
+          prev=snext
+          snext=getnext(snext)
+        elseif not krn then
+          break
+        elseif step.format=="pair" then
+          local a,b=krn[1],krn[2]
+          if optimizekerns then
+            if not b and a[1]==0 and a[2]==0 and a[4]==0 then
+              local k=setkern(snext,factor,rlmode,a[3],"injections")
+              if trace_kerns then
+                logprocess("%s: shifting single %s by %p",cref(dataset,sequence),gref(startchar),k)
+              end
+              done=true
+              break
+            end
+          end
+          if a and #a>0 then
+            local startchar=getchar(start)
+            local x,y,w,h=setpair(start,factor,rlmode,sequence.flags[4],a,"injections") 
+            if trace_kerns then
+              logprocess("%s: shifting first of pair %s and %s by (%p,%p) and correction (%p,%p)",cref(dataset,sequence),gref(startchar),gref(nextchar),x,y,w,h)
+            end
+          end
+          if b and #b>0 then
+            local startchar=getchar(start)
+            local x,y,w,h=setpair(snext,factor,rlmode,sequence.flags[4],b,"injections")
+            if trace_kerns then
+              logprocess("%s: shifting second of pair %s and %s by (%p,%p) and correction (%p,%p)",cref(dataset,sequence),gref(startchar),gref(nextchar),x,y,w,h)
+            end
+          end
+          done=true
+          break
+        elseif krn~=0 then
+          local k=setkern(snext,factor,rlmode,krn)
+          if trace_kerns then
+            logprocess("%s: inserting kern %s between %s and %s",cref(dataset,sequence),k,gref(getchar(prev)),gref(nextchar))
+          end
+          done=true
+          break
+        else
+          break
+        end
+      end
+      return head,start,done
+    end
+  end
+  return head,start,false
+end
+function chainprocs.gpos_mark2base(head,start,stop,dataset,sequence,currentlookup,rlmode)
+  local steps=currentlookup.steps
+  local nofsteps=currentlookup.nofsteps
+  if nofsteps>1 then
+    reportmoresteps(dataset,sequence)
+  end
+  local markchar=getchar(start)
+  if marks[markchar] then
+    local markanchors=steps[1].coverage[markchar] 
+    if markanchors then
+      local base=getprev(start) 
+      if base then
+        local basechar=ischar(base,currentfont)
+        if basechar then
+          if marks[basechar] then
+            while base do
+              base=getprev(base)
+              if base then
+                local basechar=ischar(base,currentfont)
+                if basechar then
+                  if not marks[basechar] then
+                    break
+                  end
+                else
+                  if trace_bugs then
+                    logwarning("%s: no base for mark %s, case %i",pref(dataset,sequence),gref(markchar),1)
+                  end
+                  return head,start,false
+                end
+              else
+                if trace_bugs then
+                  logwarning("%s: no base for mark %s, case %i",pref(dataset,sequence),gref(markchar),2)
+                end
+                return head,start,false
+              end
+            end
+          end
+          local ba=markanchors[1][basechar]
+          if ba then
+            local ma=markanchors[2]
+            if ma then
+              local dx,dy,bound=setmark(start,base,factor,rlmode,ba,ma,characters[basechar],false,checkmarks)
+              if trace_marks then
+                logprocess("%s, anchor %s, bound %s: anchoring mark %s to basechar %s => (%p,%p)",
+                  cref(dataset,sequence),anchor,bound,gref(markchar),gref(basechar),dx,dy)
+              end
+              return head,start,true
+            end
+          end
+        elseif trace_bugs then
+          logwarning("%s: prev node is no char, case %i",cref(dataset,sequence),1)
+        end
+      elseif trace_bugs then
+        logwarning("%s: prev node is no char, case %i",cref(dataset,sequence),2)
+      end
+    elseif trace_bugs then
+      logwarning("%s: mark %s has no anchors",cref(dataset,sequence),gref(markchar))
+    end
+  elseif trace_bugs then
+    logwarning("%s: mark %s is no mark",cref(dataset,sequence),gref(markchar))
+  end
+  return head,start,false
+end
+function chainprocs.gpos_mark2ligature(head,start,stop,dataset,sequence,currentlookup,rlmode)
+  local steps=currentlookup.steps
+  local nofsteps=currentlookup.nofsteps
+  if nofsteps>1 then
+    reportmoresteps(dataset,sequence)
+  end
+  local markchar=getchar(start)
+  if marks[markchar] then
+    local markanchors=steps[1].coverage[markchar] 
+    if markanchors then
+      local base=getprev(start) 
+      if base then
+        local basechar=ischar(base,currentfont)
+        if basechar then
+          if marks[basechar] then
+            while base do
+              base=getprev(base)
+              if base then
+                local basechar=ischar(base,currentfont)
+                if basechar then
+                  if not marks[basechar] then
+                    break
+                  end
+                else
+                  if trace_bugs then
+                    logwarning("%s: no base for mark %s, case %i",cref(dataset,sequence),markchar,1)
+                  end
+                  return head,start,false
+                end
+              else
+                if trace_bugs then
+                  logwarning("%s: no base for mark %s, case %i",cref(dataset,sequence),markchar,2)
+                end
+                return head,start,false
+              end
+            end
+          end
+          local ba=markanchors[1][basechar]
+          if ba then
+            local ma=markanchors[2]
+            if ma then
+              local index=getligaindex(start)
+              ba=ba[index]
+              if ba then
+                local dx,dy,bound=setmark(start,base,factor,rlmode,ba,ma,characters[basechar],false,checkmarks)
+                if trace_marks then
+                  logprocess("%s, anchor %s, bound %s: anchoring mark %s to baselig %s at index %s => (%p,%p)",
+                    cref(dataset,sequence),anchor,a or bound,gref(markchar),gref(basechar),index,dx,dy)
+                end
+                return head,start,true
+              end
+            end
+          end
+        elseif trace_bugs then
+          logwarning("%s, prev node is no char, case %i",cref(dataset,sequence),1)
+        end
+      elseif trace_bugs then
+        logwarning("%s, prev node is no char, case %i",cref(dataset,sequence),2)
+      end
+    elseif trace_bugs then
+      logwarning("%s, mark %s has no anchors",cref(dataset,sequence),gref(markchar))
+    end
+  elseif trace_bugs then
+    logwarning("%s, mark %s is no mark",cref(dataset,sequence),gref(markchar))
+  end
+  return head,start,false
+end
+function chainprocs.gpos_mark2mark(head,start,stop,dataset,sequence,currentlookup,rlmode)
+  local steps=currentlookup.steps
+  local nofsteps=currentlookup.nofsteps
+  if nofsteps>1 then
+    reportmoresteps(dataset,sequence)
+  end
+  local markchar=getchar(start)
+  if marks[markchar] then
+    local markanchors=steps[1].coverage[markchar] 
+    if markanchors then
+      local base=getprev(start) 
+      local slc=getligaindex(start)
+      if slc then 
+        while base do
+          local blc=getligaindex(base)
+          if blc and blc~=slc then
+            base=getprev(base)
+          else
+            break
+          end
+        end
+      end
+      if base then 
+        local basechar=ischar(base,currentfont)
+        if basechar then
+          local ba=markanchors[1][basechar]
+          if ba then
+            local ma=markanchors[2]
+            if ma then
+              local dx,dy,bound=setmark(start,base,factor,rlmode,ba,ma,characters[basechar],true,checkmarks)
+              if trace_marks then
+                logprocess("%s, anchor %s, bound %s: anchoring mark %s to basemark %s => (%p,%p)",
+                  cref(dataset,sequence),anchor,bound,gref(markchar),gref(basechar),dx,dy)
+              end
+              return head,start,true
+            end
+          end
+        elseif trace_bugs then
+          logwarning("%s: prev node is no mark, case %i",cref(dataset,sequence),1)
+        end
+      elseif trace_bugs then
+        logwarning("%s: prev node is no mark, case %i",cref(dataset,sequence),2)
+      end
+    elseif trace_bugs then
+      logwarning("%s: mark %s has no anchors",cref(dataset,sequence),gref(markchar))
+    end
+  elseif trace_bugs then
+    logwarning("%s: mark %s is no mark",cref(dataset,sequence),gref(markchar))
+  end
+  return head,start,false
+end
+function chainprocs.gpos_cursive(head,start,stop,dataset,sequence,currentlookup,rlmode)
+  local steps=currentlookup.steps
+  local nofsteps=currentlookup.nofsteps
+  if nofsteps>1 then
+    reportmoresteps(dataset,sequence)
+  end
+  local startchar=getchar(start)
+  local exitanchors=steps[1].coverage[startchar] 
+  if exitanchors then
+    local done=false
+    if marks[startchar] then
+      if trace_cursive then
+        logprocess("%s: ignoring cursive for mark %s",pref(dataset,sequence),gref(startchar))
+      end
+    else
+      local nxt=getnext(start)
+      while not done and nxt do
+        local nextchar=ischar(nxt,currentfont)
+        if not nextchar then
+          break
+        elseif marks[nextchar] then
+          nxt=getnext(nxt)
+        else
+          local exit=exitanchors[3]
+          if exit then
+            local entry=exitanchors[1][nextchar]
+            if entry then
+              entry=entry[2]
+              if entry then
+                local dx,dy,bound=setcursive(start,nxt,factor,rlmode,exit,entry,characters[startchar],characters[nextchar])
+                if trace_cursive then
+                  logprocess("%s: moving %s to %s cursive (%p,%p) using anchor %s and bound %s in %s mode",pref(dataset,sequence),gref(startchar),gref(nextchar),dx,dy,anchor,bound,mref(rlmode))
+                end
+                done=true
+                break
+              end
+            end
+          elseif trace_bugs then
+            onetimemessage(currentfont,startchar,"no entry anchors",report_fonts)
+          end
+          break
+        end
+      end
+    end
+    return head,start,done
+  else
+    if trace_cursive and trace_details then
+      logprocess("%s, cursive %s is already done",pref(dataset,sequence),gref(getchar(start)),alreadydone)
+    end
+    return head,start,false
+  end
+end
+local function show_skip(dataset,sequence,char,ck,class)
+  logwarning("%s: skipping char %s, class %a, rule %a, lookuptype %a",cref(dataset,sequence),gref(char),class,ck[1],ck[8] or ck[2])
+end
+local new_kern=nuts.pool.kern
+local function checked(head)
+  local current=head
+  while current do
+    if getid(current)==glue_code then
+      local kern=new_kern(getfield(current,"width"))
+      if head==current then
+        local next=getnext(current)
+        if next then
+          setlink(kern,next)
+        end
+        flush_node(current)
+        head=kern
+        current=next
+      else
+        local prev,next=getboth(current)
+        setlink(prev,kern)
+        setlink(kern,next)
+        flush_node(current)
+        current=next
+      end
+    else
+      current=getnext(current)
+    end
+  end
+  return head
+end
+local function setdiscchecked(d,pre,post,replace)
+  if pre   then pre=checked(pre)   end
+  if post  then post=checked(post)  end
+  if replace then replace=checked(replace) end
+  setdisc(d,pre,post,replace)
+end
+local function chaindisk(head,start,last,dataset,sequence,chainlookup,rlmode,k,ck,chainproc)
+  if not start then
+    return head,start,false
+  end
+  local startishead=start==head
+  local seq=ck[3]
+  local f=ck[4]
+  local l=ck[5]
+  local s=#seq
+  local done=false
+  local sweepnode=sweepnode
+  local sweeptype=sweeptype
+  local sweepoverflow=false
+  local checkdisc=getprev(head) 
+  local keepdisc=not sweepnode
+  local lookaheaddisc=nil
+  local backtrackdisc=nil
+  local current=start
+  local last=start
+  local prev=getprev(start)
+  local hasglue=false
+  local i=f
+  while i<=l do
+    local id=getid(current)
+    if id==glyph_code then
+      i=i+1
+      last=current
+      current=getnext(current)
+    elseif id==glue_code then
+      i=i+1
+      last=current
+      current=getnext(current)
+      hasglue=true
+    elseif id==disc_code then
+      if keepdisc then
+        keepdisc=false
+        if notmatchpre[current]~=notmatchreplace[current] then
+          lookaheaddisc=current
+        end
+        local replace=getfield(current,"replace")
+        while replace and i<=l do
+          if getid(replace)==glyph_code then
+            i=i+1
+          end
+          replace=getnext(replace)
+        end
+        last=current
+        current=getnext(c)
+      else
+        head,current=flattendisk(head,current)
+      end
+    else
+      last=current
+      current=getnext(current)
+    end
+    if current then
+    elseif sweepoverflow then
+      break
+    elseif sweeptype=="post" or sweeptype=="replace" then
+      current=getnext(sweepnode)
+      if current then
+        sweeptype=nil
+        sweepoverflow=true
+      else
+        break
+      end
+    else
+      break 
+    end
+  end
+  if sweepoverflow then
+    local prev=current and getprev(current)
+    if not current or prev~=sweepnode then
+      local head=getnext(sweepnode)
+      local tail=nil
+      if prev then
+        tail=prev
+        setprev(current,sweepnode)
+      else
+        tail=find_node_tail(head)
+      end
+      setnext(sweepnode,current)
+      setprev(head)
+      setnext(tail)
+      appenddisc(sweepnode,head)
+    end
+  end
+  if l<s then
+    local i=l
+    local t=sweeptype=="post" or sweeptype=="replace"
+    while current and i<s do
+      local id=getid(current)
+      if id==glyph_code then
+        i=i+1
+        current=getnext(current)
+      elseif id==glue_code then
+        i=i+1
+        current=getnext(current)
+        hasglue=true
+      elseif id==disc_code then
+        if keepdisc then
+          keepdisc=false
+          if notmatchpre[current]~=notmatchreplace[current] then
+            lookaheaddisc=current
+          end
+          local replace=getfield(c,"replace")
+          while replace and i<s do
+            if getid(replace)==glyph_code then
+              i=i+1
+            end
+            replace=getnext(replace)
+          end
+          current=getnext(current)
+        elseif notmatchpre[current]~=notmatchreplace[current] then
+          head,current=flattendisk(head,current)
+        else
+          current=getnext(current) 
+        end
+      else
+        current=getnext(current)
+      end
+      if not current and t then
+        current=getnext(sweepnode)
+        if current then
+          sweeptype=nil
+        end
+      end
+    end
+  end
+  if f>1 then
+    local current=prev
+    local i=f
+    local t=sweeptype=="pre" or sweeptype=="replace"
+    if not current and t and current==checkdisk then
+      current=getprev(sweepnode)
+    end
+    while current and i>1 do 
+      local id=getid(current)
+      if id==glyph_code then
+        i=i-1
+      elseif id==glue_code then
+        i=i-1
+        hasglue=true
+      elseif id==disc_code then
+        if keepdisc then
+          keepdisc=false
+          if notmatchpost[current]~=notmatchreplace[current] then
+            backtrackdisc=current
+          end
+          local replace=getfield(current,"replace")
+          while replace and i>1 do
+            if getid(replace)==glyph_code then
+              i=i-1
+            end
+            replace=getnext(replace)
+          end
+        elseif notmatchpost[current]~=notmatchreplace[current] then
+          head,current=flattendisk(head,current)
+        end
+      end
+      current=getprev(current)
+      if t and current==checkdisk then
+        current=getprev(sweepnode)
+      end
+    end
+  end
+  local ok=false
+  if lookaheaddisc then
+    local cf=start
+    local cl=getprev(lookaheaddisc)
+    local cprev=getprev(start)
+    local insertedmarks=0
+    while cprev do
+      local char=ischar(cf,currentfont)
+      if char and marks[char] then
+        insertedmarks=insertedmarks+1
+        cf=cprev
+        startishead=cf==head
+        cprev=getprev(cprev)
+      else
+        break
+      end
+    end
+    setprev(lookaheaddisc,cprev)
+    if cprev then
+      setnext(cprev,lookaheaddisc)
+    end
+    setprev(cf)
+    setnext(cl)
+    if startishead then
+      head=lookaheaddisc
+    end
+    local pre,post,replace=getdisc(lookaheaddisc)
+    local new=copy_node_list(cf)
+    local cnew=new
+    for i=1,insertedmarks do
+      cnew=getnext(cnew)
+    end
+    local clast=cnew
+    for i=f,l do
+      clast=getnext(clast)
+    end
+    if not notmatchpre[lookaheaddisc] then
+      cf,start,ok=chainproc(cf,start,last,dataset,sequence,chainlookup,rlmode,k)
+    end
+    if not notmatchreplace[lookaheaddisc] then
+      new,cnew,ok=chainproc(new,cnew,clast,dataset,sequence,chainlookup,rlmode,k)
+    end
+    if pre then
+      setlink(cl,pre)
+    end
+    if replace then
+      local tail=find_node_tail(new)
+      setlink(tail,replace)
+    end
+    if hasglue then
+      setdiscchecked(lookaheaddisc,cf,post,new)
+    else
+      setdisc(lookaheaddisc,cf,post,new)
+    end
+    start=getprev(lookaheaddisc)
+    sweephead[cf]=getnext(clast)
+    sweephead[new]=getnext(last)
+  elseif backtrackdisc then
+    local cf=getnext(backtrackdisc)
+    local cl=start
+    local cnext=getnext(start)
+    local insertedmarks=0
+    while cnext do
+      local char=ischar(cnext,currentfont)
+      if char and marks[char] then
+        insertedmarks=insertedmarks+1
+        cl=cnext
+        cnext=getnext(cnext)
+      else
+        break
+      end
+    end
+    if cnext then
+      setprev(cnext,backtrackdisc)
+    end
+    setnext(backtrackdisc,cnext)
+    setprev(cf)
+    setnext(cl)
+    local pre,post,replace,pretail,posttail,replacetail=getdisc(backtrackdisc,true)
+    local new=copy_node_list(cf)
+    local cnew=find_node_tail(new)
+    for i=1,insertedmarks do
+      cnew=getprev(cnew)
+    end
+    local clast=cnew
+    for i=f,l do
+      clast=getnext(clast)
+    end
+    if not notmatchpost[backtrackdisc] then
+      cf,start,ok=chainproc(cf,start,last,dataset,sequence,chainlookup,rlmode,k)
+    end
+    if not notmatchreplace[backtrackdisc] then
+      new,cnew,ok=chainproc(new,cnew,clast,dataset,sequence,chainlookup,rlmode,k)
+    end
+    if post then
+      setlink(posttail,cf)
+    else
+      post=cf
+    end
+    if replace then
+      setlink(replacetail,new)
+    else
+      replace=new
+    end
+    if hasglue then
+      setdiscchecked(backtrackdisc,pre,post,replace)
+    else
+      setdisc(backtrackdisc,pre,post,replace)
+    end
+    start=getprev(backtrackdisc)
+    sweephead[post]=getnext(clast)
+    sweephead[replace]=getnext(last)
+  else
+    head,start,ok=chainproc(head,start,last,dataset,sequence,chainlookup,rlmode,k)
+  end
+  return head,start,ok
+end
+local noflags={ false,false,false,false }
+local function handle_contextchain(head,start,dataset,sequence,contexts,rlmode)
+  local sweepnode=sweepnode
+  local sweeptype=sweeptype
+  local currentfont=currentfont
+  local diskseen=false
+  local checkdisc=getprev(head)
+  local flags=sequence.flags or noflags
+  local done=false
+  local skipmark=flags[1]
+  local skipligature=flags[2]
+  local skipbase=flags[3]
+  local markclass=sequence.markclass
+  local skipped=false
+  for k=1,#contexts do 
+    local match=true
+    local current=start
+    local last=start
+    local ck=contexts[k]
+    local seq=ck[3]
+    local s=#seq
+    local size=1
+    if s==1 then
+      local char=ischar(current,currentfont)
+      if char then
+        match=seq[1][char]
+      end
+    else
+      local f=ck[4]
+      local l=ck[5]
+      size=l-f+1
+      if size>1 then
+        local discfound=nil
+        local n=f+1
+        last=getnext(last) 
+        while n<=l do
+          if not last and (sweeptype=="post" or sweeptype=="replace") then
+            last=getnext(sweepnode)
+            sweeptype=nil
+          end
+          if last then
+            local char,id=ischar(last,currentfont)
+            if char then
+              local ccd=descriptions[char]
+              if ccd then
+                local class=ccd.class or "base"
+                if class==skipmark or class==skipligature or class==skipbase or (markclass and class=="mark" and not markclass[char]) then
+                  skipped=true
+                  if trace_skips then
+                    show_skip(dataset,sequence,char,ck,class)
+                  end
+                  last=getnext(last)
+                elseif seq[n][char] then
+                  if n<l then
+                    last=getnext(last)
+                  end
+                  n=n+1
+                else
+                  if discfound then
+                    notmatchreplace[discfound]=true
+                    match=not notmatchpre[discfound]
+                  else
+                    match=false
+                  end
+                  break
+                end
+              else
+                if discfound then
+                  notmatchreplace[discfound]=true
+                  match=not notmatchpre[discfound]
+                else
+                  match=false
+                end
+                break
+              end
+            elseif char==false then
+              if discfound then
+                notmatchreplace[discfound]=true
+                match=not notmatchpre[discfound]
+              else
+                match=false
+              end
+              break
+            elseif id==disc_code then
+              diskseen=true
+              discfound=last
+              notmatchpre[last]=nil
+              notmatchpost[last]=true
+              notmatchreplace[last]=nil
+              local pre,post,replace=getdisc(last)
+              if pre then
+                local n=n
+                while pre do
+                  if seq[n][getchar(pre)] then
+                    n=n+1
+                    pre=getnext(pre)
+                    if n>l then
+                      break
+                    end
+                  else
+                    notmatchpre[last]=true
+                    break
+                  end
+                end
+                if n<=l then
+                  notmatchpre[last]=true
+                end
+              else
+                notmatchpre[last]=true
+              end
+              if replace then
+                while replace do
+                  if seq[n][getchar(replace)] then
+                    n=n+1
+                    replace=getnext(replace)
+                    if n>l then
+                      break
+                    end
+                  else
+                    notmatchreplace[last]=true
+                    match=not notmatchpre[last]
+                    break
+                  end
+                end
+                match=not notmatchpre[last]
+              end
+              last=getnext(last)
+            else
+              match=false
+              break
+            end
+          else
+            match=false
+            break
+          end
+        end
+      end
+      if match and f>1 then
+        local prev=getprev(start)
+        if prev then
+          if prev==checkdisc and (sweeptype=="pre" or sweeptype=="replace") then
+            prev=getprev(sweepnode)
+          end
+          if prev then
+            local discfound=nil
+            local n=f-1
+            while n>=1 do
+              if prev then
+                local char,id=ischar(prev,currentfont)
+                if char then
+                  local ccd=descriptions[char]
+                  if ccd then
+                    local class=ccd.class
+                    if class==skipmark or class==skipligature or class==skipbase or (markclass and class=="mark" and not markclass[char]) then
+                      skipped=true
+                      if trace_skips then
+                        show_skip(dataset,sequence,char,ck,class)
+                      end
+                      prev=getprev(prev) 
+                    elseif seq[n][char] then
+                      if n>1 then 
+                        prev=getprev(prev) 
+                      end
+                      n=n-1
+                    else
+                      if discfound then
+                        notmatchreplace[discfound]=true
+                        match=not notmatchpost[discfound]
+                      else
+                        match=false
+                      end
+                      break
+                    end
+                  else
+                    if discfound then
+                      notmatchreplace[discfound]=true
+                      match=not notmatchpost[discfound]
+                    else
+                      match=false
+                    end
+                    break
+                  end
+                elseif char==false then
+                  if discfound then
+                    notmatchreplace[discfound]=true
+                    match=not notmatchpost[discfound]
+                  else
+                    match=false
+                  end
+                  break
+                elseif id==disc_code then
+                  diskseen=true
+                  discfound=prev
+                  notmatchpre[prev]=true
+                  notmatchpost[prev]=nil
+                  notmatchreplace[prev]=nil
+                  local pre,post,replace,pretail,posttail,replacetail=getdisc(prev,true)
+                  if pre~=start and post~=start and replace~=start then
+                    if post then
+                      local n=n
+                      while posttail do
+                        if seq[n][getchar(posttail)] then
+                          n=n-1
+                          if posttail==post then
+                            break
+                          else
+                            posttail=getprev(posttail)
+                            if n<1 then
+                              break
+                            end
+                          end
+                        else
+                          notmatchpost[prev]=true
+                          break
+                        end
+                      end
+                      if n>=1 then
+                        notmatchpost[prev]=true
+                      end
+                    else
+                      notmatchpost[prev]=true
+                    end
+                    if replace then
+                      while replacetail do
+                        if seq[n][getchar(replacetail)] then
+                          n=n-1
+                          if replacetail==replace then
+                            break
+                          else
+                            replacetail=getprev(replacetail)
+                            if n<1 then
+                              break
+                            end
+                          end
+                        else
+                          notmatchreplace[prev]=true
+                          match=not notmatchpost[prev]
+                          break
+                        end
+                      end
+                      if not match then
+                        break
+                      end
+                    end
+                  end
+                  prev=getprev(prev)
+                elseif seq[n][32] and isspace(prev,threshold) then
+                  n=n-1
+                  prev=getprev(prev)
+                else
+                  match=false
+                  break
+                end
+              else
+                match=false
+                break
+              end
+            end
+          else
+            match=false
+          end
+        else
+          match=false
+        end
+      end
+      if match and s>l then
+        local current=last and getnext(last)
+        if not current then
+          if sweeptype=="post" or sweeptype=="replace" then
+            current=getnext(sweepnode)
+          end
+        end
+        if current then
+          local discfound=nil
+          local n=l+1
+          while n<=s do
+            if current then
+              local char,id=ischar(current,currentfont)
+              if char then
+                local ccd=descriptions[char]
+                if ccd then
+                  local class=ccd.class
+                  if class==skipmark or class==skipligature or class==skipbase or (markclass and class=="mark" and not markclass[char]) then
+                    skipped=true
+                    if trace_skips then
+                      show_skip(dataset,sequence,char,ck,class)
+                    end
+                    current=getnext(current) 
+                  elseif seq[n][char] then
+                    if n<s then 
+                      current=getnext(current) 
+                    end
+                    n=n+1
+                  else
+                    if discfound then
+                      notmatchreplace[discfound]=true
+                      match=not notmatchpre[discfound]
+                    else
+                      match=false
+                    end
+                    break
+                  end
+                else
+                  if discfound then
+                    notmatchreplace[discfound]=true
+                    match=not notmatchpre[discfound]
+                  else
+                    match=false
+                  end
+                  break
+                end
+              elseif char==false then
+                if discfound then
+                  notmatchreplace[discfound]=true
+                  match=not notmatchpre[discfound]
+                else
+                  match=false
+                end
+                break
+              elseif id==disc_code then
+                diskseen=true
+                discfound=current
+                notmatchpre[current]=nil
+                notmatchpost[current]=true
+                notmatchreplace[current]=nil
+                local pre,post,replace=getdisc(current)
+                if pre then
+                  local n=n
+                  while pre do
+                    if seq[n][getchar(pre)] then
+                      n=n+1
+                      pre=getnext(pre)
+                      if n>s then
+                        break
+                      end
+                    else
+                      notmatchpre[current]=true
+                      break
+                    end
+                  end
+                  if n<=s then
+                    notmatchpre[current]=true
+                  end
+                else
+                  notmatchpre[current]=true
+                end
+                if replace then
+                  while replace do
+                    if seq[n][getchar(replace)] then
+                      n=n+1
+                      replace=getnext(replace)
+                      if n>s then
+                        break
+                      end
+                    else
+                      notmatchreplace[current]=true
+                      match=notmatchpre[current]
+                      break
+                    end
+                  end
+                  if not match then
+                    break
+                  end
+                else
+                end
+                current=getnext(current)
+              elseif seq[n][32] and isspace(current,threshold) then
+                n=n+1
+                current=getnext(current)
+              else
+                match=false
+                break
+              end
+            else
+              match=false
+              break
+            end
+          end
+        else
+          match=false
+        end
+      end
+    end
+    if match then
+      local diskchain=diskseen or sweepnode
+      if trace_contexts then
+        local rule=ck[1]
+        local lookuptype=ck[8] or ck[2]
+        local first=ck[4]
+        local last=ck[5]
+        local char=getchar(start)
+        logwarning("%s: rule %s matches at char %s for (%s,%s,%s) chars, lookuptype %a",
+          cref(dataset,sequence),rule,gref(char),first-1,last-first+1,s-last,lookuptype)
+      end
+      local chainlookups=ck[6]
+      if chainlookups then
+        local nofchainlookups=#chainlookups
+        if size==1 then
+          local chainlookup=chainlookups[1]
+          local chainkind=chainlookup.type
+          local chainproc=chainprocs[chainkind]
+          if chainproc then
+            local ok
+            if diskchain then
+              head,start,ok=chaindisk(head,start,last,dataset,sequence,chainlookup,rlmode,1,ck,chainproc)
+            else
+              head,start,ok=chainproc(head,start,last,dataset,sequence,chainlookup,rlmode,1)
+            end
+            if ok then
+              done=true
+            end
+          else
+            logprocess("%s: %s is not yet supported (1)",cref(dataset,sequence),chainkind)
+          end
+         else
+          local i=1
+          while start do
+            if skipped then
+              while start do 
+                local char=getchar(start)
+                local ccd=descriptions[char]
+                if ccd then
+                  local class=ccd.class or "base"
+                  if class==skipmark or class==skipligature or class==skipbase or (markclass and class=="mark" and not markclass[char]) then
+                    start=getnext(start)
+                  else
+                    break
+                  end
+                else
+                  break
+                end
+              end
+            end
+            local chainlookup=chainlookups[i]
+            if chainlookup then
+              local chainkind=chainlookup.type
+              local chainproc=chainprocs[chainkind]
+              if chainproc then
+                local ok,n
+                if diskchain then
+                  head,start,ok=chaindisk(head,start,last,dataset,sequence,chainlookup,rlmode,i,ck,chainproc)
+                else
+                  head,start,ok,n=chainproc(head,start,last,dataset,sequence,chainlookup,rlmode,i)
+                end
+                if ok then
+                  done=true
+                  if n and n>1 and i+n>nofchainlookups then
+                    break
+                  end
+                end
+              else
+                logprocess("%s: %s is not yet supported (2)",cref(dataset,sequence),chainkind)
+              end
+            end
+            i=i+1
+            if i>size or not start then
+              break
+            elseif start then
+              start=getnext(start)
+            end
+          end
+        end
+      else
+        local replacements=ck[7]
+        if replacements then
+          head,start,done=reversesub(head,start,last,dataset,sequence,replacements,rlmode)
+        else
+          done=true
+          if trace_contexts then
+            logprocess("%s: skipping match",cref(dataset,sequence))
+          end
+        end
+      end
+      if done then
+        break 
+      end
+    end
+  end
+  if diskseen then
+    notmatchpre={}
+    notmatchpost={}
+    notmatchreplace={}
+  end
+  return head,start,done
+end
+handlers.gsub_context=handle_contextchain
+handlers.gsub_contextchain=handle_contextchain
+handlers.gsub_reversecontextchain=handle_contextchain
+handlers.gpos_contextchain=handle_contextchain
+handlers.gpos_context=handle_contextchain
+local function chained_contextchain(head,start,stop,dataset,sequence,currentlookup,rlmode)
+  local steps=currentlookup.steps
+  local nofsteps=currentlookup.nofsteps
+  if nofsteps>1 then
+    reportmoresteps(dataset,sequence)
+  end
+  return handle_contextchain(head,start,dataset,sequence,currentlookup,rlmode)
+end
+chainprocs.gsub_context=chained_contextchain
+chainprocs.gsub_contextchain=chained_contextchain
+chainprocs.gsub_reversecontextchain=chained_contextchain
+chainprocs.gpos_contextchain=chained_contextchain
+chainprocs.gpos_context=chained_contextchain
+local missing=setmetatableindex("table")
+local function logprocess(...)
+  if trace_steps then
+    registermessage(...)
+  end
+  report_process(...)
+end
+local logwarning=report_process
+local function report_missing_coverage(dataset,sequence)
+  local t=missing[currentfont]
+  if not t[sequence] then
+    t[sequence]=true
+    logwarning("missing coverage for feature %a, lookup %a, type %a, font %a, name %a",
+      dataset[4],sequence.name,sequence.type,currentfont,tfmdata.properties.fullname)
+  end
+end
+local resolved={}
+local sequencelists=setmetatableindex(function(t,font)
+  local sequences=fontdata[font].resources.sequences
+  if not sequences or not next(sequences) then
+    sequences=false
+  end
+  t[font]=sequences
+  return sequences
+end)
+local autofeatures=fonts.analyzers.features
+local featuretypes=otf.tables.featuretypes
+local defaultscript=otf.features.checkeddefaultscript
+local defaultlanguage=otf.features.checkeddefaultlanguage
+local function initialize(sequence,script,language,enabled,autoscript,autolanguage)
+  local features=sequence.features
+  if features then
+    local order=sequence.order
+    if order then
+      local featuretype=featuretypes[sequence.type or "unknown"]
+      for i=1,#order do
+        local kind=order[i]
+        local valid=enabled[kind]
+        if valid then
+          local scripts=features[kind]
+          local languages=scripts and (
+            scripts[script] or
+            scripts[wildcard] or
+            (autoscript and defaultscript(featuretype,autoscript,scripts))
+          )
+          local enabled=languages and (
+            languages[language] or
+            languages[wildcard] or
+            (autolanguage and defaultlanguage(featuretype,autolanguage,languages))
+          )
+          if enabled then
+            return { valid,autofeatures[kind] or false,sequence,kind }
+          end
+        end
+      end
+    else
+    end
+  end
+  return false
+end
+function otf.dataset(tfmdata,font) 
+  local shared=tfmdata.shared
+  local properties=tfmdata.properties
+  local language=properties.language or "dflt"
+  local script=properties.script  or "dflt"
+  local enabled=shared.features
+  local autoscript=enabled and enabled.autoscript
+  local autolanguage=enabled and enabled.autolanguage
+  local res=resolved[font]
+  if not res then
+    res={}
+    resolved[font]=res
+  end
+  local rs=res[script]
+  if not rs then
+    rs={}
+    res[script]=rs
+  end
+  local rl=rs[language]
+  if not rl then
+    rl={
+    }
+    rs[language]=rl
+    local sequences=tfmdata.resources.sequences
+    if sequences then
+      for s=1,#sequences do
+        local v=enabled and initialize(sequences[s],script,language,enabled,autoscript,autolanguage)
+        if v then
+          rl[#rl+1]=v
+        end
+      end
+    end
+  end
+  return rl
+end
+local function report_disc(what,n)
+  report_run("%s: %s > %s",what,n,languages.serializediscretionary(n))
+end
+local function kernrun(disc,k_run,font,attr,...)
+  if trace_kernruns then
+    report_disc("kern",disc)
+  end
+  local prev,next=getboth(disc)
+  local nextstart=next
+  local done=false
+  local pre,post,replace,pretail,posttail,replacetail=getdisc(disc,true)
+  local prevmarks=prev
+  while prevmarks do
+    local char=ischar(prevmarks,font)
+    if char and marks[char] then
+      prevmarks=getprev(prevmarks)
+    else
+      break
+    end
+  end
+  if prev and not ischar(prev,font) then 
+    prev=false
+  end
+  if next and not ischar(next,font) then 
+    next=false
+  end
+  if pre then
+    if k_run(pre,"injections",nil,font,attr,...) then
+      done=true
+    end
+    if prev then
+      local nest=getprev(pre)
+      setlink(prev,pre)
+      if k_run(prevmarks,"preinjections",pre,font,attr,...) then 
+        done=true
+      end
+      setprev(pre,nest)
+      setnext(prev,disc)
+    end
+  end
+  if post then
+    if k_run(post,"injections",nil,font,attr,...) then
+      done=true
+    end
+    if next then
+      setlink(posttail,next)
+      if k_run(posttail,"postinjections",next,font,attr,...) then
+        done=true
+      end
+      setnext(posttail)
+      setprev(next,disc)
+    end
+  end
+  if replace then
+    if k_run(replace,"injections",nil,font,attr,...) then
+      done=true
+    end
+    if prev then
+      local nest=getprev(replace)
+      setlink(prev,replace)
+      if k_run(prevmarks,"replaceinjections",replace,font,attr,...) then 
+        done=true
+      end
+      setprev(replace,nest)
+      setnext(prev,disc)
+    end
+    if next then
+      setlink(replacetail,next)
+      if k_run(replacetail,"replaceinjections",next,font,attr,...) then
+        done=true
+      end
+      setnext(replacetail)
+      setprev(next,disc)
+    end
+  elseif prev and next then
+    setlink(prev,next)
+    if k_run(prevmarks,"emptyinjections",next,font,attr,...) then
+      done=true
+    end
+    setlink(prev,disc)
+    setlink(disc,next)
+  end
+  return nextstart,done
+end
+local function comprun(disc,c_run,...)
+  if trace_compruns then
+    report_disc("comp",disc)
+  end
+  local pre,post,replace=getdisc(disc)
+  local renewed=false
+  if pre then
+    sweepnode=disc
+    sweeptype="pre" 
+    local new,done=c_run(pre,...)
+    if done then
+      pre=new
+      renewed=true
+    end
+  end
+  if post then
+    sweepnode=disc
+    sweeptype="post"
+    local new,done=c_run(post,...)
+    if done then
+      post=new
+      renewed=true
+    end
+  end
+  if replace then
+    sweepnode=disc
+    sweeptype="replace"
+    local new,done=c_run(replace,...)
+    if done then
+      replace=new
+      renewed=true
+    end
+  end
+  sweepnode=nil
+  sweeptype=nil
+  if renewed then
+    setdisc(disc,pre,post,replace)
+  end
+  return getnext(disc),renewed
+end
+local function testrun(disc,t_run,c_run,...)
+  if trace_testruns then
+    report_disc("test",disc)
+  end
+  local prev,next=getboth(disc)
+  if not next then
+    return
+  end
+  local pre,post,replace,pretail,posttail,replacetail=getdisc(disc,true)
+  local done=false
+  if replace and prev then
+    setlink(replacetail,next)
+    local ok,overflow=t_run(replace,next,...)
+    if ok and overflow then
+      setfield(disc,"replace")
+      setlink(prev,replace)
+      setboth(disc)
+      flush_node_list(disc)
+      return replace,true 
+    else
+      setnext(replacetail)
+      setprev(next,disc)
+    end
+  end
+  local renewed=false
+  if pre then
+    sweepnode=disc
+    sweeptype="pre"
+    local new,ok=c_run(pre,...)
+    if ok then
+      pre=new
+      renewed=true
+    end
+  end
+  if post then
+    sweepnode=disc
+    sweeptype="post"
+    local new,ok=c_run(post,...)
+    if ok then
+      post=new
+      renewed=true
+    end
+  end
+  if replace then
+    sweepnode=disc
+    sweeptype="replace"
+    local new,ok=c_run(replace,...)
+    if ok then
+      replace=new
+      renewed=true
+    end
+  end
+  sweepnode=nil
+  sweeptype=nil
+  if renewed then
+    setdisc(disc,pre,post,replace)
+    return next,true
+  else
+    return next,done
+  end
+end
+local nesting=0
+local function c_run_single(head,font,attr,lookupcache,step,dataset,sequence,rlmode,handler)
+  local done=false
+  local sweep=sweephead[head]
+  if sweep then
+    start=sweep
+    sweephead[head]=nil
+  else
+    start=head
+  end
+  while start do
+    local char=ischar(start,font)
+    if char then
+      local a=attr and getattr(start,0)
+      if not a or (a==attr) then
+        local lookupmatch=lookupcache[char]
+        if lookupmatch then
+          local ok
+          head,start,ok=handler(head,start,dataset,sequence,lookupmatch,rlmode,step,1)
+          if ok then
+            done=true
+          end
+        end
+        if start then
+          start=getnext(start)
+        end
+      else
+        start=getnext(start)
+      end
+    elseif char==false then
+      return head,done
+    elseif sweep then
+      return head,done
+    else
+      start=getnext(start)
+    end
+  end
+  return head,done
+end
+local function t_run_single(start,stop,font,attr,lookupcache)
+  while start~=stop do
+    local char=ischar(start,font)
+    if char then
+      local a=attr and getattr(start,0)
+      if not a or (a==attr) then
+        local lookupmatch=lookupcache[char]
+        if lookupmatch then
+          local s=getnext(start)
+          local l=nil
+          local d=0
+          while s do
+            if s==stop then
+              d=1
+            elseif d>0 then
+              d=d+1
+            end
+            local lg=lookupmatch[getchar(s)]
+            if lg then
+              l=lg
+              s=getnext(s)
+            else
+              break
+            end
+          end
+          if l and l.ligature then
+            return true,d>1
+          end
+        end
+      else
+      end
+      start=getnext(start)
+    else
+      break
+    end
+  end
+end
+local function k_run_single(sub,injection,last,font,attr,lookupcache,step,dataset,sequence,rlmode,handler)
+  local a=attr and getattr(sub,0)
+  if not a or (a==attr) then
+    for n in traverse_nodes(sub) do 
+      if n==last then
+        break
+      end
+      local char=ischar(n)
+      if char then
+        local lookupmatch=lookupcache[char]
+        if lookupmatch then
+          local h,d,ok=handler(sub,n,dataset,sequence,lookupmatch,rlmode,step,1,injection)
+          if ok then
+            return true
+          end
+        end
+      end
+    end
+  end
+end
+local function c_run_multiple(head,font,attr,steps,nofsteps,dataset,sequence,rlmode,handler)
+  local done=false
+  local sweep=sweephead[head]
+  if sweep then
+    start=sweep
+    sweephead[head]=nil
+  else
+    start=head
+  end
+  while start do
+    local char=ischar(start,font)
+    if char then
+      local a=attr and getattr(start,0)
+      if not a or (a==attr) then
+        for i=1,nofsteps do
+          local step=steps[i]
+          local lookupcache=step.coverage
+          if lookupcache then
+            local lookupmatch=lookupcache[char]
+            if lookupmatch then
+              local ok
+              head,start,ok=handler(head,start,dataset,sequence,lookupmatch,rlmode,step,i)
+              if ok then
+                done=true
+                break
+              elseif not start then
+                break
+              end
+            end
+          else
+            report_missing_coverage(dataset,sequence)
+          end
+        end
+        if start then
+          start=getnext(start)
+        end
+      else
+        start=getnext(start)
+      end
+    elseif char==false then
+      return head,done
+    elseif sweep then
+      return head,done
+    else
+      start=getnext(start)
+    end
+  end
+  return head,done
+end
+local function t_run_multiple(start,stop,font,attr,steps,nofsteps)
+  while start~=stop do
+    local char=ischar(start,font)
+    if char then
+      local a=attr and getattr(start,0)
+      if not a or (a==attr) then
+        for i=1,nofsteps do
+          local step=steps[i]
+          local lookupcache=step.coverage
+          if lookupcache then
+            local lookupmatch=lookupcache[char]
+            if lookupmatch then
+              local s=getnext(start)
+              local l=nil
+              local d=0
+              while s do
+                if s==stop then
+                  d=1
+                elseif d>0 then
+                  d=d+1
+                end
+                local lg=lookupmatch[getchar(s)]
+                if lg then
+                  l=lg
+                  s=getnext(s)
+                else
+                  break
+                end
+              end
+              if l and l.ligature then
+                return true,d>1
+              end
+            end
+          else
+            report_missing_coverage(dataset,sequence)
+          end
+        end
+      else
+      end
+      start=getnext(start)
+    else
+      break
+    end
+  end
+end
+local function k_run_multiple(sub,injection,last,font,attr,steps,nofsteps,dataset,sequence,rlmode,handler)
+  local a=attr and getattr(sub,0)
+  if not a or (a==attr) then
+    for n in traverse_nodes(sub) do 
+      if n==last then
+        break
+      end
+      local char=ischar(n)
+      if char then
+        for i=1,nofsteps do
+          local step=steps[i]
+          local lookupcache=step.coverage
+          if lookupcache then
+            local lookupmatch=lookupcache[char]
+            if lookupmatch then
+              local h,d,ok=handler(head,n,dataset,sequence,lookupmatch,step,rlmode,i,injection)
+              if ok then
+                return true
+              end
+            end
+          else
+            report_missing_coverage(dataset,sequence)
+          end
+        end
+      end
+    end
+  end
+end
+local function txtdirstate(start,stack,top,rlparmode)
+  local dir=getfield(start,"dir")
+  local new=1
+  if dir=="+TRT" then
+    top=top+1
+    stack[top]=dir
+    new=-1
+  elseif dir=="+TLT" then
+    top=top+1
+    stack[top]=dir
+  elseif dir=="-TRT" or dir=="-TLT" then
+    top=top-1
+    if stack[top]=="+TRT" then
+      new=-1
+    end
+  else
+    new=rlparmode
+  end
+  if trace_directions then
+    report_process("directions after txtdir %a: parmode %a, txtmode %a, level %a",dir,mref(rlparmode),mref(new),top)
+  end
+  return getnext(start),top,new
+end
+local function pardirstate(start)
+  local dir=getfield(start,"dir")
+  local new=0
+  if dir=="TLT" then
+    new=1
+  elseif dir=="TRT" then
+    new=-1
+  end
+  if trace_directions then
+    report_process("directions after pardir %a: parmode %a",dir,mref(new))
+  end
+  return getnext(start),new,new
+end
+otf.helpers=otf.helpers or {}
+otf.helpers.txtdirstate=txtdirstate
+otf.helpers.pardirstate=pardirstate
+local function featuresprocessor(head,font,attr)
+  local sequences=sequencelists[font] 
+  if not sequencelists then
+    return head,false
+  end
+  nesting=nesting+1
+  if nesting==1 then
+    currentfont=font
+    tfmdata=fontdata[font]
+    descriptions=tfmdata.descriptions
+    characters=tfmdata.characters
+    marks=tfmdata.resources.marks
+    threshold,
+    factor=getthreshold(font)
+    checkmarks=tfmdata.properties.checkmarks
+  elseif currentfont~=font then
+    report_warning("nested call with a different font, level %s, quitting",nesting)
+    nesting=nesting-1
+    return head,false
+  end
+  head=tonut(head)
+  if trace_steps then
+    checkstep(head)
+  end
+  local rlmode=0
+  local done=false
+  local datasets=otf.dataset(tfmdata,font,attr)
+  local forcedisc=alwaysdisc or not attr
+  local dirstack={} 
+  sweephead={}
+  for s=1,#datasets do
+    local dataset=datasets[s]
+    local attribute=dataset[2]
+    local sequence=dataset[3] 
+    local rlparmode=0
+    local topstack=0
+    local success=false
+    local typ=sequence.type
+    local gpossing=typ=="gpos_single" or typ=="gpos_pair" 
+    local handler=handlers[typ]
+    local steps=sequence.steps
+    local nofsteps=sequence.nofsteps
+    if not steps then
+      local h,d,ok=handler(head,head,dataset,sequence,nil,nil,nil,0,font,attr)
+      if ok then
+        success=true
+        if h then
+          head=h
+        end
+      end
+    elseif typ=="gsub_reversecontextchain" then
+      local start=find_node_tail(head)
+      while start do
+        local char=ischar(start,font)
+        if char then
+          local a=attr and getattr(start,0)
+          if not a or (a==attr) then
+            for i=1,nofsteps do
+              local step=steps[i]
+              local lookupcache=step.coverage
+              if lookupcache then
+                local lookupmatch=lookupcache[char]
+                if lookupmatch then
+                  local ok
+                  head,start,ok=handler(head,start,dataset,sequence,lookupmatch,rlmode,step,i)
+                  if ok then
+                    success=true
+                    break
+                  end
+                end
+              else
+                report_missing_coverage(dataset,sequence)
+              end
+            end
+            if start then
+              start=getprev(start)
+            end
+          else
+            start=getprev(start)
+          end
+        else
+          start=getprev(start)
+        end
+      end
+    else
+      local start=head 
+      rlmode=0 
+      if nofsteps==1 then 
+        local step=steps[1]
+        local lookupcache=step.coverage
+        if not lookupcache then
+          report_missing_coverage(dataset,sequence)
+        else
+          while start do
+            local char,id=ischar(start,font)
+            if char then
+              local a=attr and getattr(start,0)
+              if a then
+                a=(a==attr) and (not attribute or getprop(start,a_state)==attribute)
+              else
+                a=not attribute or getprop(start,a_state)==attribute
+              end
+              if a then
+                local lookupmatch=lookupcache[char]
+                if lookupmatch then
+                  local ok
+                  head,start,ok=handler(head,start,dataset,sequence,lookupmatch,rlmode,step,1)
+                  if ok then
+                    success=true
+                  end
+                end
+                if start then
+                  start=getnext(start)
+                end
+              else
+                start=getnext(start)
+              end
+            elseif char==false then
+              start=getnext(start)
+            elseif id==disc_code then
+              local a=forcedisc or getsubtype(start)==discretionary_code or getattr(start,0)==attr
+              if a then
+                local ok
+                if gpossing then
+                  start,ok=kernrun(start,k_run_single,font,attr,lookupcache,step,dataset,sequence,rlmode,handler)
+                elseif typ=="gsub_ligature" then
+                  start,ok=testrun(start,t_run_single,c_run_single,font,attr,lookupcache,step,dataset,sequence,rlmode,handler)
+                else
+                  start,ok=comprun(start,c_run_single,font,attr,lookupcache,step,dataset,sequence,rlmode,handler)
+                end
+                if ok then
+                  success=true
+                end
+              else
+                start=getnext(start)
+              end
+            elseif id==math_code then
+              start=getnext(end_of_math(start))
+            elseif id==dir_code then
+              start,topstack,rlmode=txtdirstate(start,dirstack,topstack,rlparmode)
+            elseif id==localpar_code then
+              start,rlparmode,rlmode=pardirstate(start)
+            else
+              start=getnext(start)
+            end
+          end
+        end
+      else
+        while start do
+          local char,id=ischar(start,font)
+          if char then
+            local a=attr and getattr(start,0)
+            if a then
+              a=(a==attr) and (not attribute or getprop(start,a_state)==attribute)
+            else
+              a=not attribute or getprop(start,a_state)==attribute
+            end
+            if a then
+              for i=1,nofsteps do
+                local step=steps[i]
+                local lookupcache=step.coverage
+                if lookupcache then
+                  local lookupmatch=lookupcache[char]
+                  if lookupmatch then
+                    local ok
+                    head,start,ok=handler(head,start,dataset,sequence,lookupmatch,rlmode,step,i)
+                    if ok then
+                      success=true
+                      break
+                    elseif not start then
+                      break
+                    end
+                  end
+                else
+                  report_missing_coverage(dataset,sequence)
+                end
+              end
+              if start then
+                start=getnext(start)
+              end
+            else
+              start=getnext(start)
+            end
+          elseif char==false then
+            start=getnext(start)
+          elseif id==disc_code then
+            local a=forcedisc or getsubtype(start)==discretionary_code or getattr(start,0)==attr
+            if a then
+              local ok
+              if gpossing then
+                start,ok=kernrun(start,k_run_multiple,font,attr,steps,nofsteps,dataset,sequence,rlmode,handler)
+              elseif typ=="gsub_ligature" then
+                start,ok=testrun(start,t_run_multiple,c_run_multiple,font,attr,steps,nofsteps,dataset,sequence,rlmode,handler)
+              else
+                start,ok=comprun(start,c_run_multiple,font,attr,steps,nofsteps,dataset,sequence,rlmode,handler)
+              end
+              if ok then
+                success=true
+              end
+            else
+              start=getnext(start)
+            end
+          elseif id==math_code then
+            start=getnext(end_of_math(start))
+          elseif id==dir_code then
+            start,topstack,rlmode=txtdirstate(start,dirstack,topstack,rlparmode)
+          elseif id==localpar_code then
+            start,rlparmode,rlmode=pardirstate(start)
+          else
+            start=getnext(start)
+          end
+        end
+      end
+    end
+    if success then
+      done=true
+    end
+    if trace_steps then 
+      registerstep(head)
+    end
+  end
+  nesting=nesting-1
+  head=tonode(head)
+  return head,done
+end
+local plugins={}
+otf.plugins=plugins
+function otf.registerplugin(name,f)
+  if type(name)=="string" and type(f)=="function" then
+    plugins[name]={ name,f }
+  end
+end
+local function plugininitializer(tfmdata,value)
+  if type(value)=="string" then
+    tfmdata.shared.plugin=plugins[value]
+  end
+end
+local function pluginprocessor(head,font)
+  local s=fontdata[font].shared
+  local p=s and s.plugin
+  if p then
+    if trace_plugins then
+      report_process("applying plugin %a",p[1])
+    end
+    return p[2](head,font)
+  else
+    return head,false
+  end
+end
+local function featuresinitializer(tfmdata,value)
+end
+registerotffeature {
+  name="features",
+  description="features",
+  default=true,
+  initializers={
+    position=1,
+    node=featuresinitializer,
+    plug=plugininitializer,
+  },
+  processors={
+    node=featuresprocessor,
+    plug=pluginprocessor,
+  }
+}
+otf.nodemodeinitializer=featuresinitializer
+otf.featuresprocessor=featuresprocessor
+otf.handlers=handlers
+local setspacekerns=nodes.injections.setspacekerns if not setspacekerns then os.exit() end
+if fontfeatures then
+  function otf.handlers.trigger_space_kerns(head,start,dataset,sequence,_,_,_,_,font,attr)
+    local features=fontfeatures[font]
+    local enabled=features and features.spacekern and features.kern
+    if enabled then
+      setspacekerns(font,sequence)
+    end
+    return head,start,enabled
+  end
+else 
+  function otf.handlers.trigger_space_kerns(head,start,dataset,sequence,_,_,_,_,font,attr)
+    local shared=fontdata[font].shared
+    local features=shared and shared.features
+    local enabled=features and features.spacekern and features.kern
+    if enabled then
+      setspacekerns(font,sequence)
+    end
+    return head,start,enabled
+  end
+end
+local function hasspacekerns(data)
+  local sequences=data.resources.sequences
+  for i=1,#sequences do
+    local sequence=sequences[i]
+    local steps=sequence.steps
+    if steps and sequence.features.kern then
+      for i=1,#steps do
+        local coverage=steps[i].coverage
+        if not coverage then
+        elseif coverage[32] then
+          return true
+        else
+          for k,v in next,coverage do
+            if v[32] then
+              return true
+            end
+          end
+        end
+      end
+    end
+  end
+  return false
+end
+otf.readers.registerextender {
+  name="spacekerns",
+  action=function(data)
+    data.properties.hasspacekerns=hasspacekerns(data)
+  end
+}
+local function spaceinitializer(tfmdata,value) 
+  local resources=tfmdata.resources
+  local spacekerns=resources and resources.spacekerns
+  local properties=tfmdata.properties
+  if value and spacekerns==nil then
+    if properties and properties.hasspacekerns then
+      local sequences=resources.sequences
+      local left={}
+      local right={}
+      local last=0
+      local feat=nil
+      for i=1,#sequences do
+        local sequence=sequences[i]
+        local steps=sequence.steps
+        if steps then
+          local kern=sequence.features.kern
+          if kern then
+            if feat then
+              for script,languages in next,kern do
+                local f=feat[script]
+                if f then
+                  for l in next,languages do
+                    f[l]=true
+                  end
+                else
+                  feat[script]=languages
+                end
+              end
+            else
+              feat=kern
+            end
+            for i=1,#steps do
+              local step=steps[i]
+              local coverage=step.coverage
+              local rules=step.rules
+              local format=step.format
+              if rules then
+              elseif coverage then
+                local single=format==gpos_single
+                local kerns=coverage[32]
+                if kerns then
+                  for k,v in next,kerns do
+                    if type(v)~="table" then
+                      right[k]=v
+                    elseif single then
+                      right[k]=v[3]
+                    else
+                      local one=v[1]
+                      if one then
+                        right[k]=one[3]
+                      end
+                    end
+                  end
+                end
+                for k,v in next,coverage do
+                  local kern=v[32]
+                  if kern then
+                    if type(kern)~="table" then
+                      left[k]=kern
+                    elseif single then
+                      left[k]=v[3]
+                    else
+                      local one=v[1]
+                      if one then
+                        left[k]=one[3]
+                      end
+                    end
+                  end
+                end
+              end
+            end
+            last=i
+          end
+        else
+        end
+      end
+      left=next(left) and left or false
+      right=next(right) and right or false
+      if left or right then
+        spacekerns={
+          left=left,
+          right=right,
+        }
+        if last>0 then
+          local triggersequence={
+            features={ kern=feat or { dflt={ dflt=true,} } },
+            flags=noflags,
+            name="trigger_space_kerns",
+            order={ "kern" },
+            type="trigger_space_kerns",
+            left=left,
+            right=right,
+          }
+          insert(sequences,last,triggersequence)
+        end
+      else
+        spacekerns=false
+      end
+    else
+      spacekerns=false
+    end
+    resources.spacekerns=spacekerns
+  end
+  return spacekerns
+end
+registerotffeature {
+  name="spacekern",
+  description="space kern injection",
+  default=true,
+  initializers={
+    node=spaceinitializer,
+  },
+}
+local function markinitializer(tfmdata,value)
+  local properties=tfmdata.properties
+  properties.checkmarks=value
+end
+registerotffeature {
+  name="checkmarks",
+  description="check mark widths",
+  default=true,
+  initializers={
+    node=markinitializer,
+  },
+}
+
+end --- [luaotfload, fontloader-2017-02-11.lua scope for “font-ots”] ---
+
+
+do  --- [luaotfload, fontloader-2017-02-11.lua scope for “font-osd” 10ecd4b375680b011e7c6a25e5ad74f7] ---
+
+if not modules then modules={} end modules ['font-osd']={ 
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Kai Eigner, TAT Zetwerk / Hans Hagen, PRAGMA ADE",
+  copyright="TAT Zetwerk / PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local insert,imerge,copy=table.insert,table.imerge,table.copy
+local next,type=next,type
+local report_devanagari=logs.reporter("otf","devanagari")
+fonts=fonts          or {}
+fonts.analyzers=fonts.analyzers     or {}
+fonts.analyzers.methods=fonts.analyzers.methods or { node={ otf={} } }
+local otf=fonts.handlers.otf
+local handlers=otf.handlers
+local methods=fonts.analyzers.methods
+local otffeatures=fonts.constructors.features.otf
+local registerotffeature=otffeatures.register
+local nuts=nodes.nuts
+local tonode=nuts.tonode
+local tonut=nuts.tonut
+local getnext=nuts.getnext
+local getprev=nuts.getprev
+local getboth=nuts.getboth
+local getid=nuts.getid
+local getchar=nuts.getchar
+local getfont=nuts.getfont
+local getsubtype=nuts.getsubtype
+local setlink=nuts.setlink
+local setnext=nuts.setnext
+local setprev=nuts.setprev
+local setchar=nuts.setchar
+local getprop=nuts.getprop
+local setprop=nuts.setprop
+local ischar=nuts.is_char
+local insert_node_after=nuts.insert_after
+local copy_node=nuts.copy
+local remove_node=nuts.remove
+local flush_list=nuts.flush_list
+local flush_node=nuts.flush_node
+local copyinjection=nodes.injections.copy 
+local unsetvalue=attributes.unsetvalue
+local fontdata=fonts.hashes.identifiers
+local a_state=attributes.private('state')
+local a_syllabe=attributes.private('syllabe')
+local dotted_circle=0x25CC
+local states=fonts.analyzers.states 
+local s_rphf=states.rphf
+local s_half=states.half
+local s_pref=states.pref
+local s_blwf=states.blwf
+local s_pstf=states.pstf
+local replace_all_nbsp=nil
+replace_all_nbsp=function(head) 
+  replace_all_nbsp=typesetters and typesetters.characters and typesetters.characters.replacenbspaces or function(head)
+    return head
+  end
+  return replace_all_nbsp(head)
+end
+local xprocesscharacters=nil
+if context then
+  xprocesscharacters=function(head,font)
+    xprocesscharacters=nodes.handlers.characters
+    return xprocesscharacters(head,font)
+  end
+else
+  xprocesscharacters=function(head,font)
+    xprocesscharacters=nodes.handlers.nodepass 
+    return xprocesscharacters(head,font)
+  end
+end
+local function processcharacters(head,font)
+  return tonut(xprocesscharacters(tonode(head))) 
+end
+local consonant={
+  [0x0915]=true,[0x0916]=true,[0x0917]=true,[0x0918]=true,
+  [0x0919]=true,[0x091A]=true,[0x091B]=true,[0x091C]=true,
+  [0x091D]=true,[0x091E]=true,[0x091F]=true,[0x0920]=true,
+  [0x0921]=true,[0x0922]=true,[0x0923]=true,[0x0924]=true,
+  [0x0925]=true,[0x0926]=true,[0x0927]=true,[0x0928]=true,
+  [0x0929]=true,[0x092A]=true,[0x092B]=true,[0x092C]=true,
+  [0x092D]=true,[0x092E]=true,[0x092F]=true,[0x0930]=true,
+  [0x0931]=true,[0x0932]=true,[0x0933]=true,[0x0934]=true,
+  [0x0935]=true,[0x0936]=true,[0x0937]=true,[0x0938]=true,
+  [0x0939]=true,[0x0958]=true,[0x0959]=true,[0x095A]=true,
+  [0x095B]=true,[0x095C]=true,[0x095D]=true,[0x095E]=true,
+  [0x095F]=true,[0x0979]=true,[0x097A]=true,
+  [0x0C95]=true,[0x0C96]=true,[0x0C97]=true,[0x0C98]=true,
+  [0x0C99]=true,[0x0C9A]=true,[0x0C9B]=true,[0x0C9C]=true,
+  [0x0C9D]=true,[0x0C9E]=true,[0x0C9F]=true,[0x0CA0]=true,
+  [0x0CA1]=true,[0x0CA2]=true,[0x0CA3]=true,[0x0CA4]=true,
+  [0x0CA5]=true,[0x0CA6]=true,[0x0CA7]=true,[0x0CA8]=true,
+  [0x0CA9]=true,[0x0CAA]=true,[0x0CAB]=true,[0x0CAC]=true,
+  [0x0CAD]=true,[0x0CAE]=true,[0x0CAF]=true,[0x0CB0]=true,
+  [0x0CB1]=true,[0x0CB2]=true,[0x0CB3]=true,[0x0CB4]=true,
+  [0x0CB5]=true,[0x0CB6]=true,[0x0CB7]=true,[0x0CB8]=true,
+  [0x0CB9]=true,
+  [0x0CDE]=true,
+  [0x0D15]=true,[0x0D16]=true,[0x0D17]=true,[0x0D18]=true,
+  [0x0D19]=true,[0x0D1A]=true,[0x0D1B]=true,[0x0D1C]=true,
+  [0x0D1D]=true,[0x0D1E]=true,[0x0D1F]=true,[0x0D20]=true,
+  [0x0D21]=true,[0x0D22]=true,[0x0D23]=true,[0x0D24]=true,
+  [0x0D25]=true,[0x0D26]=true,[0x0D27]=true,[0x0D28]=true,
+  [0x0D29]=true,[0x0D2A]=true,[0x0D2B]=true,[0x0D2C]=true,
+  [0x0D2D]=true,[0x0D2E]=true,[0x0D2F]=true,[0x0D30]=true,
+  [0x0D31]=true,[0x0D32]=true,[0x0D33]=true,[0x0D34]=true,
+  [0x0D35]=true,[0x0D36]=true,[0x0D37]=true,[0x0D38]=true,
+  [0x0D39]=true,[0x0D3A]=true,
+}
+local independent_vowel={
+  [0x0904]=true,[0x0905]=true,[0x0906]=true,[0x0907]=true,
+  [0x0908]=true,[0x0909]=true,[0x090A]=true,[0x090B]=true,
+  [0x090C]=true,[0x090D]=true,[0x090E]=true,[0x090F]=true,
+  [0x0910]=true,[0x0911]=true,[0x0912]=true,[0x0913]=true,
+  [0x0914]=true,[0x0960]=true,[0x0961]=true,[0x0972]=true,
+  [0x0973]=true,[0x0974]=true,[0x0975]=true,[0x0976]=true,
+  [0x0977]=true,
+  [0x0C85]=true,[0x0C86]=true,[0x0C87]=true,[0x0C88]=true,
+  [0x0C89]=true,[0x0C8A]=true,[0x0C8B]=true,[0x0C8C]=true,
+  [0x0C8D]=true,[0x0C8E]=true,[0x0C8F]=true,[0x0C90]=true,
+  [0x0C91]=true,[0x0C92]=true,[0x0C93]=true,[0x0C94]=true,
+  [0x0D05]=true,[0x0D06]=true,[0x0D07]=true,[0x0D08]=true,
+  [0x0D09]=true,[0x0D0A]=true,[0x0D0B]=true,[0x0D0C]=true,
+  [0x0D0E]=true,[0x0D0F]=true,[0x0D10]=true,[0x0D12]=true,
+  [0x0D13]=true,[0x0D14]=true,
+}
+local dependent_vowel={
+  [0x093A]=true,[0x093B]=true,[0x093E]=true,[0x093F]=true,
+  [0x0940]=true,[0x0941]=true,[0x0942]=true,[0x0943]=true,
+  [0x0944]=true,[0x0945]=true,[0x0946]=true,[0x0947]=true,
+  [0x0948]=true,[0x0949]=true,[0x094A]=true,[0x094B]=true,
+  [0x094C]=true,[0x094E]=true,[0x094F]=true,[0x0955]=true,
+  [0x0956]=true,[0x0957]=true,[0x0962]=true,[0x0963]=true,
+  [0x0CBE]=true,[0x0CBF]=true,[0x0CC0]=true,[0x0CC1]=true,
+  [0x0CC2]=true,[0x0CC3]=true,[0x0CC4]=true,[0x0CC5]=true,
+  [0x0CC6]=true,[0x0CC7]=true,[0x0CC8]=true,[0x0CC9]=true,
+  [0x0CCA]=true,[0x0CCB]=true,[0x0CCC]=true,
+  [0x0D3E]=true,[0x0D3F]=true,[0x0D40]=true,[0x0D41]=true,
+  [0x0D42]=true,[0x0D43]=true,[0x0D44]=true,[0x0D46]=true,
+  [0x0D47]=true,[0x0D48]=true,[0x0D4A]=true,[0x0D4B]=true,
+  [0x0D4C]=true,[0x0D57]=true,
+}
+local vowel_modifier={
+  [0x0900]=true,[0x0901]=true,[0x0902]=true,[0x0903]=true,
+  [0xA8E0]=true,[0xA8E1]=true,[0xA8E2]=true,[0xA8E3]=true,
+  [0xA8E4]=true,[0xA8E5]=true,[0xA8E6]=true,[0xA8E7]=true,
+  [0xA8E8]=true,[0xA8E9]=true,[0xA8EA]=true,[0xA8EB]=true,
+  [0xA8EC]=true,[0xA8ED]=true,[0xA8EE]=true,[0xA8EF]=true,
+  [0xA8F0]=true,[0xA8F1]=true,
+  [0x0D02]=true,[0x0D03]=true,
+}
+local stress_tone_mark={
+  [0x0951]=true,[0x0952]=true,[0x0953]=true,[0x0954]=true,
+  [0x0CCD]=true,
+  [0x0D4D]=true,
+}
+local nukta={
+  [0x093C]=true,
+  [0x0CBC]=true,
+}
+local halant={
+  [0x094D]=true,
+  [0x0CCD]=true,
+  [0x0D4D]=true,
+}
+local ra={
+  [0x0930]=true,
+  [0x0CB0]=true,
+  [0x0D30]=true,
+}
+local c_anudatta=0x0952 
+local c_nbsp=0x00A0 
+local c_zwnj=0x200C 
+local c_zwj=0x200D 
+local zw_char={ 
+  [0x200C]=true,
+  [0x200D]=true,
+}
+local pre_mark={
+  [0x093F]=true,[0x094E]=true,
+  [0x0D46]=true,[0x0D47]=true,[0x0D48]=true,
+}
+local above_mark={
+  [0x0900]=true,[0x0901]=true,[0x0902]=true,[0x093A]=true,
+  [0x0945]=true,[0x0946]=true,[0x0947]=true,[0x0948]=true,
+  [0x0951]=true,[0x0953]=true,[0x0954]=true,[0x0955]=true,
+  [0xA8E0]=true,[0xA8E1]=true,[0xA8E2]=true,[0xA8E3]=true,
+  [0xA8E4]=true,[0xA8E5]=true,[0xA8E6]=true,[0xA8E7]=true,
+  [0xA8E8]=true,[0xA8E9]=true,[0xA8EA]=true,[0xA8EB]=true,
+  [0xA8EC]=true,[0xA8ED]=true,[0xA8EE]=true,[0xA8EF]=true,
+  [0xA8F0]=true,[0xA8F1]=true,
+  [0x0D4E]=true,
+}
+local below_mark={
+  [0x093C]=true,[0x0941]=true,[0x0942]=true,[0x0943]=true,
+  [0x0944]=true,[0x094D]=true,[0x0952]=true,[0x0956]=true,
+  [0x0957]=true,[0x0962]=true,[0x0963]=true,
+}
+local post_mark={
+  [0x0903]=true,[0x093B]=true,[0x093E]=true,[0x0940]=true,
+  [0x0949]=true,[0x094A]=true,[0x094B]=true,[0x094C]=true,
+  [0x094F]=true,
+}
+local twopart_mark={
+  [0x0D4A]={ 0x0D46,0x0D3E,},	
+  [0x0D4B]={ 0x0D47,0x0D3E,},	
+  [0x0D4C]={ 0x0D46,0x0D57,},	
+}
+local mark_four={} 
+for k,v in next,pre_mark  do mark_four[k]=pre_mark  end
+for k,v in next,above_mark do mark_four[k]=above_mark end
+for k,v in next,below_mark do mark_four[k]=below_mark end
+for k,v in next,post_mark do mark_four[k]=post_mark end
+local mark_above_below_post={}
+for k,v in next,above_mark do mark_above_below_post[k]=above_mark end
+for k,v in next,below_mark do mark_above_below_post[k]=below_mark end
+for k,v in next,post_mark do mark_above_below_post[k]=post_mark end
+local reorder_class={
+  [0x0930]="before postscript",
+  [0x093F]="before half",
+  [0x0940]="after subscript",
+  [0x0941]="after subscript",
+  [0x0942]="after subscript",
+  [0x0943]="after subscript",
+  [0x0944]="after subscript",
+  [0x0945]="after subscript",
+  [0x0946]="after subscript",
+  [0x0947]="after subscript",
+  [0x0948]="after subscript",
+  [0x0949]="after subscript",
+  [0x094A]="after subscript",
+  [0x094B]="after subscript",
+  [0x094C]="after subscript",
+  [0x0962]="after subscript",
+  [0x0963]="after subscript",
+  [0x093E]="after subscript",
+  [0x0CB0]="after postscript",
+  [0x0CBF]="before subscript",
+  [0x0CC6]="before subscript",
+  [0x0CCC]="before subscript",
+  [0x0CBE]="before subscript",
+  [0x0CE2]="before subscript",
+  [0x0CE3]="before subscript",
+  [0x0CC1]="before subscript",
+  [0x0CC2]="before subscript",
+  [0x0CC3]="after subscript",
+  [0x0CC4]="after subscript",
+  [0x0CD5]="after subscript",
+  [0x0CD6]="after subscript",
+}
+local dflt_true={
+  dflt=true
+}
+local dev2_defaults={
+  dev2=dflt_true,
+}
+local deva_defaults={
+  dev2=dflt_true,
+  deva=dflt_true,
+}
+local false_flags={ false,false,false,false }
+local both_joiners_true={
+  [0x200C]=true,
+  [0x200D]=true,
+}
+local sequence_reorder_matras={
+  features={ dv01=dev2_defaults },
+  flags=false_flags,
+  name="dv01_reorder_matras",
+  order={ "dv01" },
+  type="devanagari_reorder_matras",
+  nofsteps=1,
+  steps={
+    {
+      osdstep=true,
+      coverage=pre_mark,
+    }
+  }
+}
+local sequence_reorder_reph={
+  features={ dv02=dev2_defaults },
+  flags=false_flags,
+  name="dv02_reorder_reph",
+  order={ "dv02" },
+  type="devanagari_reorder_reph",
+  nofsteps=1,
+  steps={
+    {
+      osdstep=true,
+      coverage={},
+    }
+  }
+}
+local sequence_reorder_pre_base_reordering_consonants={
+  features={ dv03=dev2_defaults },
+  flags=false_flags,
+  name="dv03_reorder_pre_base_reordering_consonants",
+  order={ "dv03" },
+  type="devanagari_reorder_pre_base_reordering_consonants",
+  nofsteps=1,
+  steps={
+    {
+      osdstep=true,
+      coverage={},
+    }
+  }
+}
+local sequence_remove_joiners={
+  features={ dv04=deva_defaults },
+  flags=false_flags,
+  name="dv04_remove_joiners",
+  order={ "dv04" },
+  type="devanagari_remove_joiners",
+  nofsteps=1,
+  steps={
+    { osdstep=true,
+      coverage=both_joiners_true,
+    },
+  }
+}
+local basic_shaping_forms={
+  nukt=true,
+  akhn=true,
+  rphf=true,
+  pref=true,
+  rkrf=true,
+  blwf=true,
+  half=true,
+  pstf=true,
+  vatu=true,
+  cjct=true,
+}
+local valid={
+  akhn=true,
+  rphf=true,
+  pref=true,
+  half=true,
+  blwf=true,
+  pstf=true,
+  pres=true,
+  blws=true,
+  psts=true,
+}
+local function initializedevanagi(tfmdata)
+  local script,language=otf.scriptandlanguage(tfmdata,attr) 
+  if script=="deva" or script=="dev2" or script=="mlym" or script=="mlm2" then
+    local resources=tfmdata.resources
+    local devanagari=resources.devanagari
+    if not devanagari then
+      report_devanagari("adding devanagari features to font")
+      local gsubfeatures=resources.features.gsub
+      local sequences=resources.sequences
+      local sharedfeatures=tfmdata.shared.features
+      local lastmatch=0
+      for s=1,#sequences do 
+        local features=sequences[s].features
+        if features then
+          for k,v in next,features do
+            if basic_shaping_forms[k] then
+              lastmatch=s
+            end
+          end
+        end
+      end
+      local insertindex=lastmatch+1
+      gsubfeatures["dv01"]=dev2_defaults 
+      gsubfeatures["dv02"]=dev2_defaults 
+      gsubfeatures["dv03"]=dev2_defaults 
+      gsubfeatures["dv04"]=deva_defaults
+      local reorder_pre_base_reordering_consonants=copy(sequence_reorder_pre_base_reordering_consonants)
+      local reorder_reph=copy(sequence_reorder_reph)
+      local reorder_matras=copy(sequence_reorder_matras)
+      local remove_joiners=copy(sequence_remove_joiners)
+      insert(sequences,insertindex,reorder_pre_base_reordering_consonants)
+      insert(sequences,insertindex,reorder_reph)
+      insert(sequences,insertindex,reorder_matras)
+      insert(sequences,insertindex,remove_joiners)
+      local blwfcache={}
+      local seqsubset={}
+      local rephstep={
+        coverage={} 
+      }
+      local devanagari={
+        reph=false,
+        vattu=false,
+        blwfcache=blwfcache,
+        seqsubset=seqsubset,
+        reorderreph=rephstep,
+      }
+      reorder_reph.steps={ rephstep }
+      local pre_base_reordering_consonants={}
+      reorder_pre_base_reordering_consonants.steps[1].coverage=pre_base_reordering_consonants
+      resources.devanagari=devanagari
+      for s=1,#sequences do
+        local sequence=sequences[s]
+        local steps=sequence.steps
+        local nofsteps=sequence.nofsteps
+        local features=sequence.features
+        local has_rphf=features.rphf
+        local has_blwf=features.blwf
+        if has_rphf and has_rphf.deva then
+          devanagari.reph=true
+        elseif has_blwf and has_blwf.deva then
+          devanagari.vattu=true
+          for i=1,nofsteps do
+            local step=steps[i]
+            local coverage=step.coverage
+            if coverage then
+              for k,v in next,coverage do
+                if not blwfcache[k] then
+                  blwfcache[k]=v
+                end
+              end
+            end
+          end
+        end
+        for kind,spec in next,features do 
+          if spec.dev2 and valid[kind] then
+            for i=1,nofsteps do
+              local step=steps[i]
+              local coverage=step.coverage
+              if coverage then
+                local reph=false
+                if kind=="rphf" then
+                  if true then
+                    for k,v in next,ra do
+                      local r=coverage[k]
+                      if r then
+                        local h=false
+                        for k,v in next,halant do
+                          local h=r[k]
+                          if h then
+                            reph=h.ligature or false
+                            break
+                          end
+                        end
+                        if reph then
+                          break
+                        end
+                      end
+                    end
+                  else
+                  end
+                end
+                seqsubset[#seqsubset+1]={ kind,coverage,reph }
+              end
+            end
+          end
+          if kind=="pref" then
+            local steps=sequence.steps
+            local nofsteps=sequence.nofsteps
+            for i=1,nofsteps do
+              local step=steps[i]
+              local coverage=step.coverage
+              if coverage then
+                for k,v in next,halant do
+                  local h=coverage[k]
+                  if h then
+                    local found=false
+                    for k,v in next,h do
+                      found=v and v.ligature
+                      if found then
+                        pre_base_reordering_consonants[k]=found
+                        break
+                      end
+                    end
+                    if found then
+                      break
+                    end
+                  end
+                end
+              end
+            end
+          end
+        end
+      end
+      if script=="deva" then
+        sharedfeatures["dv04"]=true 
+      elseif script=="dev2" then
+        sharedfeatures["dv01"]=true 
+        sharedfeatures["dv02"]=true 
+        sharedfeatures["dv03"]=true 
+        sharedfeatures["dv04"]=true 
+      elseif script=="mlym" then
+        sharedfeatures["pstf"]=true
+      elseif script=="mlm2" then
+        sharedfeatures["pstf"]=true
+        sharedfeatures["pref"]=true
+        sharedfeatures["dv03"]=true 
+        gsubfeatures ["dv03"]=dev2_defaults 
+        insert(sequences,insertindex,sequence_reorder_pre_base_reordering_consonants)
+      end
+    end
+  end
+end
+registerotffeature {
+  name="devanagari",
+  description="inject additional features",
+  default=true,
+  initializers={
+    node=initializedevanagi,
+  },
+}
+local function deva_initialize(font,attr) 
+  local tfmdata=fontdata[font]
+  local datasets=otf.dataset(tfmdata,font,attr) 
+  local devanagaridata=datasets.devanagari
+  if not devanagaridata then
+    devanagaridata={
+      reph=false,
+      vattu=false,
+      blwfcache={},
+    }
+    datasets.devanagari=devanagaridata
+    local resources=tfmdata.resources
+    local devanagari=resources.devanagari
+    for s=1,#datasets do
+      local dataset=datasets[s]
+      if dataset and dataset[1] then 
+        local kind=dataset[4]
+        if kind=="rphf" then
+          devanagaridata.reph=true
+        elseif kind=="blwf" then
+          devanagaridata.vattu=true
+          devanagaridata.blwfcache=devanagari.blwfcache
+        end
+      end
+    end
+  end
+  return devanagaridata.reph,devanagaridata.vattu,devanagaridata.blwfcache
+end
+local function deva_reorder(head,start,stop,font,attr,nbspaces)
+  local reph,vattu,blwfcache=deva_initialize(font,attr) 
+  local current=start
+  local n=getnext(start)
+  local base=nil
+  local firstcons=nil
+  local lastcons=nil
+  local basefound=false
+  if reph and ra[getchar(start)] and halant[getchar(n)] then
+    if n==stop then
+      return head,stop,nbspaces
+    end
+    if getchar(getnext(n))==c_zwj then
+      current=start
+    else
+      current=getnext(n)
+      setprop(start,a_state,s_rphf)
+    end
+  end
+  if getchar(current)==c_nbsp then
+    if current==stop then
+      stop=getprev(stop)
+      head=remove_node(head,current)
+      flush_node(current)
+      return head,stop,nbspaces
+    else
+      nbspaces=nbspaces+1
+      base=current
+      firstcons=current
+      lastcons=current
+      current=getnext(current)
+      if current~=stop then
+        if nukta[getchar(current)] then
+          current=getnext(current)
+        end
+        if getchar(current)==c_zwj then
+          if current~=stop then
+            local next=getnext(current)
+            if next~=stop and halant[getchar(next)] then
+              current=next
+              next=getnext(current)
+              local tmp=next and getnext(next) or nil 
+              local changestop=next==stop
+              local tempcurrent=copy_node(next)
+							copyinjection(tempcurrent,next)
+              local nextcurrent=copy_node(current)
+							copyinjection(nextcurrent,current) 
+              setlink(tempcurrent,nextcurrent)
+              setprop(tempcurrent,a_state,s_blwf)
+              tempcurrent=processcharacters(tempcurrent,font)
+              setprop(tempcurrent,a_state,unsetvalue)
+              if getchar(next)==getchar(tempcurrent) then
+                flush_list(tempcurrent)
+                local n=copy_node(current)
+								copyinjection(n,current) 
+                setchar(current,dotted_circle)
+                head=insert_node_after(head,current,n)
+              else
+                setchar(current,getchar(tempcurrent)) 
+                local freenode=getnext(current)
+                setlink(current,tmp)
+                flush_node(freenode)
+                flush_list(tempcurrent)
+                if changestop then
+                  stop=current
+                end
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+  while not basefound do
+    local char=getchar(current)
+    if consonant[char] then
+      setprop(current,a_state,s_half)
+      if not firstcons then
+        firstcons=current
+      end
+      lastcons=current
+      if not base then
+        base=current
+      elseif blwfcache[char] then
+        setprop(current,a_state,s_blwf)
+      else
+        base=current
+      end
+    end
+    basefound=current==stop
+    current=getnext(current)
+  end
+  if base~=lastcons then
+    local np=base
+    local n=getnext(base)
+    local ch=getchar(n)
+    if nukta[ch] then
+      np=n
+      n=getnext(n)
+      ch=getchar(n)
+    end
+    if halant[ch] then
+      if lastcons~=stop then
+        local ln=getnext(lastcons)
+        if nukta[getchar(ln)] then
+          lastcons=ln
+        end
+      end
+      local nn=getnext(n)
+      local ln=getnext(lastcons) 
+      setlink(np,nn)
+      setnext(lastcons,n)
+      if ln then
+        setprev(ln,n)
+      end
+      setnext(n,ln)
+      setprev(n,lastcons)
+      if lastcons==stop then
+        stop=n
+      end
+    end
+  end
+  n=getnext(start)
+  if n~=stop and ra[getchar(start)] and halant[getchar(n)] and not zw_char[getchar(getnext(n))] then
+    local matra=base
+    if base~=stop then
+      local next=getnext(base)
+      if dependent_vowel[getchar(next)] then
+        matra=next
+      end
+    end
+    local sp=getprev(start)
+    local nn=getnext(n)
+    local mn=getnext(matra)
+    setlink(sp,nn)
+    setlink(matra,start)
+    setlink(n,mn)
+    if head==start then
+      head=nn
+    end
+    start=nn
+    if matra==stop then
+      stop=n
+    end
+  end
+  local current=start
+  while current~=stop do
+    local next=getnext(current)
+    if next~=stop and halant[getchar(next)] and getchar(getnext(next))==c_zwnj then
+      setprop(current,a_state,unsetvalue)
+    end
+    current=next
+  end
+  if base~=stop and getprop(base,a_state) then
+    local next=getnext(base)
+    if halant[getchar(next)] and not (next~=stop and getchar(getnext(next))==c_zwj) then
+      setprop(base,a_state,unsetvalue)
+    end
+  end
+  local current,allreordered,moved=start,false,{ [base]=true }
+  local a,b,p,bn=base,base,base,getnext(base)
+  if base~=stop and nukta[getchar(bn)] then
+    a,b,p=bn,bn,bn
+  end
+  while not allreordered do
+    local c=current
+    local n=getnext(current)
+    local l=nil 
+    if c~=stop then
+      local ch=getchar(n)
+      if nukta[ch] then
+        c=n
+        n=getnext(n)
+        ch=getchar(n)
+      end
+      if c~=stop then
+        if halant[ch] then
+          c=n
+          n=getnext(n)
+          ch=getchar(n)
+        end
+        while c~=stop and dependent_vowel[ch] do
+          c=n
+          n=getnext(n)
+          ch=getchar(n)
+        end
+        if c~=stop then
+          if vowel_modifier[ch] then
+            c=n
+            n=getnext(n)
+            ch=getchar(n)
+          end
+          if c~=stop and stress_tone_mark[ch] then
+            c=n
+            n=getnext(n)
+          end
+        end
+      end
+    end
+    local bp=getprev(firstcons)
+    local cn=getnext(current)
+    local last=getnext(c)
+    while cn~=last do
+      if pre_mark[getchar(cn)] then
+        if bp then
+          setnext(bp,cn)
+        end
+        local prev,next=getboth(cn)
+        if next then
+          setprev(next,prev)
+        end
+        setnext(prev,next)
+        if cn==stop then
+          stop=prev
+        end
+        setprev(cn,bp)
+        setlink(cn,firstcons)
+        if firstcons==start then
+          if head==start then
+            head=cn
+          end
+          start=cn
+        end
+        break
+      end
+      cn=getnext(cn)
+    end
+    allreordered=c==stop
+    current=getnext(c)
+  end
+  if reph or vattu then
+    local current,cns=start,nil
+    while current~=stop do
+      local c=current
+      local n=getnext(current)
+      if ra[getchar(current)] and halant[getchar(n)] then
+        c=n
+        n=getnext(n)
+        local b,bn=base,base
+        while bn~=stop do
+          local next=getnext(bn)
+          if dependent_vowel[getchar(next)] then
+            b=next
+          end
+          bn=next
+        end
+        if getprop(current,a_state)==s_rphf then
+          if b~=current then
+            if current==start then
+              if head==start then
+                head=n
+              end
+              start=n
+            end
+            if b==stop then
+              stop=c
+            end
+            local prev=getprev(current)
+            setlink(prev,n)
+            local next=getnext(b)
+            setlink(c,next)
+            setlink(b,current)
+          end
+        elseif cns and getnext(cns)~=current then
+          local cp=getprev(current)
+          local cnsn=getnext(cns)
+          setlink(cp,n)
+          setlink(cns,current)
+          setlink(c,cnsn)
+          if c==stop then
+            stop=cp
+            break
+          end
+          current=getprev(n)
+        end
+      else
+        local char=getchar(current)
+        if consonant[char] then
+          cns=current
+          local next=getnext(cns)
+          if halant[getchar(next)] then
+            cns=next
+          end
+        elseif char==c_nbsp then
+          nbspaces=nbspaces+1
+          cns=current
+          local next=getnext(cns)
+          if halant[getchar(next)] then
+            cns=next
+          end
+        end
+      end
+      current=getnext(current)
+    end
+  end
+  if getchar(base)==c_nbsp then
+    nbspaces=nbspaces-1
+    head=remove_node(head,base)
+    flush_node(base)
+  end
+  return head,stop,nbspaces
+end
+function handlers.devanagari_reorder_matras(head,start) 
+  local current=start 
+  local startfont=getfont(start)
+  local startattr=getprop(start,a_syllabe)
+  while current do
+    local char=ischar(current,startfont)
+    local next=getnext(current)
+    if char and getprop(current,a_syllabe)==startattr then
+      if halant[char] and not getprop(current,a_state) then
+        if next then
+          local char=ischar(next,startfont)
+          if char and zw_char[char] and getprop(next,a_syllabe)==startattr then
+            current=next
+            next=getnext(current)
+          end
+        end
+        local startnext=getnext(start)
+        head=remove_node(head,start)
+        setlink(start,next)
+        setlink(current,start)
+        start=startnext
+        break
+      end
+    else
+      break
+    end
+    current=next
+  end
+  return head,start,true
+end
+function handlers.devanagari_reorder_reph(head,start)
+  local current=getnext(start)
+  local startnext=nil
+  local startprev=nil
+  local startfont=getfont(start)
+  local startattr=getprop(start,a_syllabe)
+  while current do
+    local char=ischar(current,startfont)
+    if char and getprop(current,a_syllabe)==startattr then 
+      if halant[char] and not getprop(current,a_state) then
+        local next=getnext(current)
+        if next then
+          local nextchar=ischar(next,startfont)
+          if nextchar and zw_char[nextchar] and getprop(next,a_syllabe)==startattr then
+            current=next
+            next=getnext(current)
+          end
+        end
+        startnext=getnext(start)
+        head=remove_node(head,start)
+        setlink(start,next)
+        setlink(current,start)
+        start=startnext
+        startattr=getprop(start,a_syllabe)
+        break
+      end
+      current=getnext(current)
+    else
+      break
+    end
+  end
+  if not startnext then
+    current=getnext(start)
+    while current do
+      local char=ischar(current,startfont)
+      if char and getprop(current,a_syllabe)==startattr then 
+        if getprop(current,a_state)==s_pstf then 
+          startnext=getnext(start)
+          head=remove_node(head,start)
+          local prev=getprev(current)
+          setlink(prev,start)
+          setlink(start,current)
+          start=startnext
+          startattr=getprop(start,a_syllabe)
+          break
+        end
+        current=getnext(current)
+      else
+        break
+      end
+    end
+  end
+  if not startnext then
+    current=getnext(start)
+    local c=nil
+    while current do
+      local char=ischar(current,startfont)
+      if char and getprop(current,a_syllabe)==startattr then 
+        if not c and mark_above_below_post[char] and reorder_class[char]~="after subscript" then
+          c=current
+        end
+        current=getnext(current)
+      else
+        break
+      end
+    end
+    if c then
+      startnext=getnext(start)
+      head=remove_node(head,start)
+      local prev=getprev(c)
+      setlink(prev,start)
+      setlink(start,c)
+      start=startnext
+      startattr=getprop(start,a_syllabe)
+    end
+  end
+  if not startnext then
+    current=start
+    local next=getnext(current)
+    while next do
+      local nextchar=ischar(next,startfont)
+      if nextchar and getprop(next,a_syllabe)==startattr then 
+        current=next
+        next=getnext(current)
+      else
+        break
+      end
+    end
+    if start~=current then
+      startnext=getnext(start)
+      head=remove_node(head,start)
+      local next=getnext(current)
+      setlink(start,next)
+      setlink(current,start)
+      start=startnext
+    end
+  end
+  return head,start,true
+end
+function handlers.devanagari_reorder_pre_base_reordering_consonants(head,start)
+  local current=start
+  local startnext=nil
+  local startprev=nil
+  local startfont=getfont(start)
+  local startattr=getprop(start,a_syllabe)
+  while current do
+    local char=ischar(current,startfont)
+    if char and getprop(current,a_syllabe)==startattr then
+      local next=getnext(current)
+      if halant[char] and not getprop(current,a_state) then
+        if next then
+          local nextchar=ischar(next,startfont)
+          if nextchar and getprop(next,a_syllabe)==startattr then
+            if nextchar==c_zwnj or nextchar==c_zwj then
+              current=next
+              next=getnext(current)
+            end
+          end
+        end
+        startnext=getnext(start)
+        removenode(start,start)
+        setlink(start,next)
+        setlink(current,start)
+        start=startnext
+        break
+      end
+      current=next
+    else
+      break
+    end
+  end
+  if not startnext then
+    current=getnext(start)
+    startattr=getprop(start,a_syllabe)
+    while current do
+      local char=ischar(current,startfont)
+      if char and getprop(current,a_syllabe)==startattr then
+        if not consonant[char] and getprop(current,a_state) then 
+          startnext=getnext(start)
+          removenode(start,start)
+          local prev=getprev(current)
+          setlink(prev,start)
+          setlink(start,current)
+          start=startnext
+          break
+        end
+        current=getnext(current)
+      else
+        break
+      end
+    end
+  end
+  return head,start,true
+end
+function handlers.devanagari_remove_joiners(head,start,kind,lookupname,replacement)
+  local stop=getnext(start)
+  local font=getfont(start)
+  local last=start
+  while stop do
+    local char=ischar(stop,font)
+    if char and (char==c_zwnj or char==c_zwj) then
+      last=stop
+      stop=getnext(stop)
+    else
+      break
+    end
+  end
+  local prev=getprev(start)
+  if stop then
+    setnext(last)
+    setlink(prev,stop)
+  elseif prev then
+    setnext(prev)
+  end
+  if head==start then
+  	head=stop
+  end
+  flush_list(start)
+  return head,stop,true
+end
+local function dev2_initialize(font,attr)
+  local devanagari=fontdata[font].resources.devanagari
+  if devanagari then
+    return devanagari.seqsubset or {},devanagari.reorderreph or {}
+  else
+    return {},{}
+  end
+end
+local function dev2_reorder(head,start,stop,font,attr,nbspaces) 
+  local seqsubset,reorderreph=dev2_initialize(font,attr)
+  local reph=false 
+  local halfpos=nil
+  local basepos=nil
+  local subpos=nil
+  local postpos=nil
+  local locl={}
+  for i=1,#seqsubset do
+    local subset=seqsubset[i]
+    local kind=subset[1]
+    local lookupcache=subset[2]
+    if kind=="rphf" then
+      reph=subset[3]
+      local current=start
+      local last=getnext(stop)
+      while current~=last do
+        if current~=stop then
+          local c=locl[current] or getchar(current)
+          local found=lookupcache[c]
+          if found then
+            local next=getnext(current)
+            local n=locl[next] or getchar(next)
+            if found[n] then  
+              local afternext=next~=stop and getnext(next)
+              if afternext and zw_char[getchar(afternext)] then 
+                current=next
+                current=getnext(current)
+              elseif current==start then
+                setprop(current,a_state,s_rphf)
+                current=next
+              else
+                current=next
+              end
+            end
+          end
+        end
+        current=getnext(current)
+      end
+    elseif kind=="pref" then
+      local current=start
+      local last=getnext(stop)
+      while current~=last do
+        if current~=stop then
+          local c=locl[current] or getchar(current)
+          local found=lookupcache[c]
+          if found then 
+            local next=getnext(current)
+            local n=locl[next] or getchar(next)
+            if found[n] then
+              setprop(current,a_state,s_pref)
+              setprop(next,a_state,s_pref)
+              current=next
+            end
+          end
+        end
+        current=getnext(current)
+      end
+    elseif kind=="half" then 
+      local current=start
+      local last=getnext(stop)
+      while current~=last do
+        if current~=stop then
+          local c=locl[current] or getchar(current)
+          local found=lookupcache[c]
+          if found then
+            local next=getnext(current)
+            local n=locl[next] or getchar(next)
+            if found[n] then
+              if next~=stop and getchar(getnext(next))==c_zwnj then  
+                current=next
+              else
+                setprop(current,a_state,s_half)
+                if not halfpos then
+                  halfpos=current
+                end
+              end
+              current=getnext(current)
+            end
+          end
+        end
+        current=getnext(current)
+      end
+    elseif kind=="blwf" then 
+      local current=start
+      local last=getnext(stop)
+      while current~=last do
+        if current~=stop then
+          local c=locl[current] or getchar(current)
+          local found=lookupcache[c]
+          if found then
+            local next=getnext(current)
+            local n=locl[next] or getchar(next)
+            if found[n] then
+              setprop(current,a_state,s_blwf)
+              setprop(next,a_state,s_blwf)
+              current=next
+              subpos=current
+            end
+          end
+        end
+        current=getnext(current)
+      end
+    elseif kind=="pstf" then 
+      local current=start
+      local last=getnext(stop)
+      while current~=last do
+        if current~=stop then
+          local c=locl[current] or getchar(current)
+          local found=lookupcache[c]
+          if found then
+            local next=getnext(current)
+            local n=locl[next] or getchar(next)
+            if found[n] then
+              setprop(current,a_state,s_pstf)
+              setprop(next,a_state,s_pstf)
+              current=next
+              postpos=current
+            end
+          end
+        end
+        current=getnext(current)
+      end
+    end
+  end
+  reorderreph.coverage={ [reph]=true }
+  local current,base,firstcons=start,nil,nil
+  if getprop(start,a_state)==s_rphf then
+    current=getnext(getnext(start))
+  end
+  if current~=getnext(stop) and getchar(current)==c_nbsp then
+    if current==stop then
+      stop=getprev(stop)
+      head=remove_node(head,current)
+      flush_node(current)
+      return head,stop,nbspaces
+    else
+      nbspaces=nbspaces+1
+      base=current
+      current=getnext(current)
+      if current~=stop then
+        local char=getchar(current)
+        if nukta[char] then
+          current=getnext(current)
+          char=getchar(current)
+        end
+        if char==c_zwj then
+          local next=getnext(current)
+          if current~=stop and next~=stop and halant[getchar(next)] then
+            current=next
+            next=getnext(current)
+            local tmp=getnext(next)
+            local changestop=next==stop
+            setnext(next,nil)
+            setprop(current,a_state,s_pref)
+            current=processcharacters(current,font)
+            setprop(current,a_state,s_blwf)
+            current=processcharacters(current,font)
+            setprop(current,a_state,s_pstf)
+            current=processcharacters(current,font)
+            setprop(current,a_state,unsetvalue)
+            if halant[getchar(current)] then
+              setnext(getnext(current),tmp)
+              local nc=copy_node(current)
+							copyinjection(nc,current)
+              setchar(current,dotted_circle)
+              head=insert_node_after(head,current,nc)
+            else
+              setnext(current,tmp) 
+              if changestop then
+                stop=current
+              end
+            end
+          end
+        end
+      end
+    end
+  else 
+    local last=getnext(stop)
+    while current~=last do  
+      local next=getnext(current)
+      if consonant[getchar(current)] then
+        if not (current~=stop and next~=stop and halant[getchar(next)] and getchar(getnext(next))==c_zwj) then
+          if not firstcons then
+            firstcons=current
+          end
+          local a=getprop(current,a_state)
+          if not (a==s_pref or a==s_blwf or a==s_pstf) then
+            base=current
+          end
+        end
+      end
+      current=next
+    end
+    if not base then
+      base=firstcons
+    end
+  end
+  if not base then
+    if getprop(start,a_state)==s_rphf then
+      setprop(start,a_state,unsetvalue)
+    end
+    return head,stop,nbspaces
+  else
+    if getprop(base,a_state) then
+      setprop(base,a_state,unsetvalue)
+    end
+    basepos=base
+  end
+  if not halfpos then
+    halfpos=base
+  end
+  if not subpos then
+    subpos=base
+  end
+  if not postpos then
+    postpos=subpos or base
+  end
+  local moved={}
+  local current=start
+  local last=getnext(stop)
+  while current~=last do
+    local char,target,cn=locl[current] or getchar(current),nil,getnext(current)
+    local tpm=twopart_mark[char]
+    if tpm then
+      local extra=copy_node(current)
+      copyinjection(extra,current)
+      char=tpm[1]
+      setchar(current,char)
+      setchar(extra,tpm[2])
+      head=insert_node_after(head,current,extra)
+    end
+    if not moved[current] and dependent_vowel[char] then
+      if pre_mark[char] then      
+        moved[current]=true
+        local prev,next=getboth(current)
+        setlink(prev,next)
+        if current==stop then
+          stop=getprev(current)
+        end
+        if halfpos==start then
+          if head==start then
+            head=current
+          end
+          start=current
+        end
+        local prev=getprev(halfpos)
+        setlink(prev,current)
+        setlink(current,halfpos)
+        halfpos=current
+      elseif above_mark[char] then  
+        target=basepos
+        if subpos==basepos then
+          subpos=current
+        end
+        if postpos==basepos then
+          postpos=current
+        end
+        basepos=current
+      elseif below_mark[char] then  
+        target=subpos
+        if postpos==subpos then
+          postpos=current
+        end
+        subpos=current
+      elseif post_mark[char] then  
+        target=postpos
+        postpos=current
+      end
+      if mark_above_below_post[char] then
+        local prev=getprev(current)
+        if prev~=target then
+          local next=getnext(current)
+          setlink(prev,next)
+          if current==stop then
+            stop=prev
+          end
+          local next=getnext(target)
+          setlink(current,next)
+          setlink(target,current)
+        end
+      end
+    end
+    current=cn
+  end
+  local current,c=start,nil
+  while current~=stop do
+    local char=getchar(current)
+    if halant[char] or stress_tone_mark[char] then
+      if not c then
+        c=current
+      end
+    else
+      c=nil
+    end
+    local next=getnext(current)
+    if c and nukta[getchar(next)] then
+      if head==c then
+        head=next
+      end
+      if stop==next then
+        stop=current
+      end
+      local prev=getprev(c)
+      setlink(prev,next)
+      local nextnext=getnext(next)
+      setnext(current,nextnext)
+      local nextnextnext=getnext(nextnext)
+      if nextnextnext then
+        setprev(nextnextnext,current)
+      end
+      setlink(nextnext,c)
+    end
+    if stop==current then break end
+    current=getnext(current)
+  end
+  if getchar(base)==c_nbsp then
+    if base==stop then
+      stop=getprev(stop)
+    end
+    nbspaces=nbspaces-1
+    head=remove_node(head,base)
+    flush_node(base)
+  end
+  return head,stop,nbspaces
+end
+local separator={}
+imerge(separator,consonant)
+imerge(separator,independent_vowel)
+imerge(separator,dependent_vowel)
+imerge(separator,vowel_modifier)
+imerge(separator,stress_tone_mark)
+for k,v in next,nukta do separator[k]=true end
+for k,v in next,halant do separator[k]=true end
+local function analyze_next_chars_one(c,font,variant)
+  local n=getnext(c)
+  if not n then
+    return c
+  end
+  if variant==1 then
+    local v=ischar(n,font)
+    if v and nukta[v] then
+      n=getnext(n)
+      if n then
+        v=ischar(n,font)
+      end
+    end
+    if n and v then
+      local nn=getnext(n)
+      if nn then
+        local vv=ischar(nn,font)
+        if vv then
+          local nnn=getnext(nn)
+          if nnn then
+            local vvv=ischar(nnn,font)
+            if vvv then
+              if vv==c_zwj and consonant[vvv] then
+                c=nnn
+              elseif (vv==c_zwnj or vv==c_zwj) and halant[vvv] then
+                local nnnn=getnext(nnn)
+                if nnnn then
+                  local vvvv=ischar(nnnn,font)
+                  if vvvv and consonant[vvvv] then
+                    c=nnnn
+                  end
+                end
+              end
+            end
+          end
+        end
+      end
+    end
+  elseif variant==2 then
+    local v=ischar(n,font)
+    if v and nukta[v] then
+      c=n
+    end
+    n=getnext(c)
+    if n then
+      v=ischar(n,font)
+      if v then
+        local nn=getnext(n)
+        if nn then
+          local vv=ischar(nn,font)
+          if vv and zw_char[v] then
+            n=nn
+            v=vv
+            nn=getnext(nn)
+            vv=nn and ischar(nn,font)
+          end
+          if vv and halant[v] and consonant[vv] then
+            c=nn
+          end
+        end
+      end
+    end
+  end
+  local n=getnext(c)
+  if not n then
+    return c
+  end
+  local v=ischar(n,font)
+  if not v then
+    return c
+  end
+  if dependent_vowel[v] then
+    c=getnext(c)
+    n=getnext(c)
+    if not n then
+      return c
+    end
+    v=ischar(n,font)
+    if not v then
+      return c
+    end
+  end
+  if nukta[v] then
+    c=getnext(c)
+    n=getnext(c)
+    if not n then
+      return c
+    end
+    v=ischar(n,font)
+    if not v then
+      return c
+    end
+  end
+  if halant[v] then
+    c=getnext(c)
+    n=getnext(c)
+    if not n then
+      return c
+    end
+    v=ischar(n,font)
+    if not v then
+      return c
+    end
+  end
+  if vowel_modifier[v] then
+    c=getnext(c)
+    n=getnext(c)
+    if not n then
+      return c
+    end
+    v=ischar(n,font)
+    if not v then
+      return c
+    end
+  end
+  if stress_tone_mark[v] then
+    c=getnext(c)
+    n=getnext(c)
+    if not n then
+      return c
+    end
+    v=ischar(n,font)
+    if not v then
+      return c
+    end
+  end
+  if stress_tone_mark[v] then
+    return n
+  else
+    return c
+  end
+end
+local function analyze_next_chars_two(c,font)
+  local n=getnext(c)
+  if not n then
+    return c
+  end
+  local v=ischar(n,font)
+  if v and nukta[v] then
+    c=n
+  end
+  n=c
+  while true do
+    local nn=getnext(n)
+    if nn then
+      local vv=ischar(nn,font)
+      if vv then
+        if halant[vv] then
+          n=nn
+          local nnn=getnext(nn)
+          if nnn then
+            local vvv=ischar(nnn,font)
+            if vvv and zw_char[vvv] then
+              n=nnn
+            end
+          end
+        elseif vv==c_zwnj or vv==c_zwj then
+          local nnn=getnext(nn)
+          if nnn then
+            local vvv=ischar(nnn,font)
+            if vvv and halant[vvv] then
+              n=nnn
+            end
+          end
+        else
+          break
+        end
+        local nn=getnext(n)
+        if nn then
+          local vv=ischar(nn,font)
+          if vv and consonant[vv] then
+            n=nn
+            local nnn=getnext(nn)
+            if nnn then
+              local vvv=ischar(nnn,font)
+              if vvv and nukta[vvv] then
+                n=nnn
+              end
+            end
+            c=n
+          else
+            break
+          end
+        else
+          break
+        end
+      else
+        break
+      end
+    else
+      break
+    end
+  end
+  if not c then
+    return
+  end
+  local n=getnext(c)
+  if not n then
+    return c
+  end
+  local v=ischar(n,font)
+  if not v then
+    return c
+  end
+  if v==c_anudatta then
+    c=n
+    n=getnext(c)
+    if not n then
+      return c
+    end
+    v=ischar(n,font)
+    if not v then
+      return c
+    end
+  end
+  if halant[v] then
+    c=n
+    n=getnext(c)
+    if not n then
+      return c
+    end
+    v=ischar(n,font)
+    if not v then
+      return c
+    end
+    if v==c_zwnj or v==c_zwj then
+      c=n
+      n=getnext(c)
+      if not n then
+        return c
+      end
+      v=ischar(n,font)
+      if not v then
+        return c
+      end
+    end
+  else
+    if dependent_vowel[v] then
+      c=n
+      n=getnext(c)
+      if not n then
+        return c
+      end
+      v=ischar(n,font)
+      if not v then
+        return c
+      end
+    end
+    if nukta[v] then
+      c=n
+      n=getnext(c)
+      if not n then
+        return c
+      end
+      v=ischar(n,font)
+      if not v then
+        return c
+      end
+    end
+    if halant[v] then
+      c=n
+      n=getnext(c)
+      if not n then
+        return c
+      end
+      v=ischar(n,font)
+      if not v then
+        return c
+      end
+    end
+  end
+  if vowel_modifier[v] then
+    c=n
+    n=getnext(c)
+    if not n then
+      return c
+    end
+    v=ischar(n,font)
+    if not v then
+      return c
+    end
+  end
+  if stress_tone_mark[v] then
+    c=n
+    n=getnext(c)
+    if not n then
+      return c
+    end
+    v=ischar(n,font)
+    if not v then
+      return c
+    end
+  end
+  if stress_tone_mark[v] then
+    return n
+  else
+    return c
+  end
+end
+local function inject_syntax_error(head,current,mark)
+  local signal=copy_node(current)
+	copyinjection(signal,current)
+  if mark==pre_mark then 
+    setchar(signal,dotted_circle)
+  else
+    setchar(current,dotted_circle)
+  end
+  return insert_node_after(head,current,signal)
+end
+function methods.deva(head,font,attr)
+  head=tonut(head)
+  local current=head
+  local start=true
+  local done=false
+  local nbspaces=0
+  while current do
+		local char=ischar(current,font)
+    if char then
+      done=true
+      local syllablestart=current
+      local syllableend=nil
+      local c=current
+      local n=getnext(c)
+	    local first=char
+      if n and ra[first] then
+        local second=ischar(n,font)
+        if second and halant[second] then
+          local n=getnext(n)
+          if n then
+            local third=ischar(n,font)
+            if third then
+              c=n
+              first=third
+            end
+          end
+        end
+      end
+      local standalone=first==c_nbsp
+      if standalone then
+        local prev=getprev(current)
+        if prev then
+          local prevchar=ischar(prev,font)
+          if not prevchar then
+          elseif not separator[prevchar] then
+          else
+            standalone=false
+          end
+        else
+        end
+      end
+      if standalone then
+				local syllableend=analyze_next_chars_one(c,font,2)
+				current=getnext(syllableend)
+        if syllablestart~=syllableend then
+          head,current,nbspaces=deva_reorder(head,syllablestart,syllableend,font,attr,nbspaces)
+          current=getnext(current)
+        end
+      else
+        if consonant[char] then
+          local prevc=true
+          while prevc do
+            prevc=false
+            local n=getnext(current)
+            if not n then
+              break
+            end
+            local v=ischar(n,font)
+            if not v then
+              break
+            end
+            if nukta[v] then
+              n=getnext(n)
+              if not n then
+                break
+              end
+              v=ischar(n,font)
+              if not v then
+                break
+              end
+            end
+            if halant[v] then
+              n=getnext(n)
+              if not n then
+                break
+              end
+              v=ischar(n,font)
+              if not v then
+                break
+              end
+              if v==c_zwnj or v==c_zwj then
+                n=getnext(n)
+                if not n then
+                  break
+                end
+                v=ischar(n,font)
+                if not v then
+                  break
+                end
+              end
+              if consonant[v] then
+                prevc=true
+                current=n
+              end
+            end
+          end
+          local n=getnext(current)
+          if n then
+            local v=ischar(n,font)
+            if v and nukta[v] then
+              current=n
+              n=getnext(current)
+            end
+          end
+          syllableend=current
+          current=n
+          if current then
+            local v=ischar(current,font)
+            if not v then
+            elseif halant[v] then
+              local n=getnext(current)
+              if n then
+                local v=ischar(n,font)
+                if v and zw_char[v] then
+                  syllableend=n
+                  current=getnext(n)
+                else
+                  syllableend=current
+                  current=n
+                end
+              else
+                syllableend=current
+                current=n
+              end
+            else
+              if dependent_vowel[v] then
+                syllableend=current
+                current=getnext(current)
+                v=ischar(current,font)
+              end
+              if v and vowel_modifier[v] then
+                syllableend=current
+                current=getnext(current)
+                v=ischar(current,font)
+              end
+              if v and stress_tone_mark[v] then
+                syllableend=current
+                current=getnext(current)
+              end
+            end
+          end
+          if syllablestart~=syllableend then
+            head,current,nbspaces=deva_reorder(head,syllablestart,syllableend,font,attr,nbspaces)
+            current=getnext(current)
+          end
+        elseif independent_vowel[char] then
+          syllableend=current
+          current=getnext(current)
+          if current then
+            local v=ischar(current,font)
+            if v then
+              if vowel_modifier[v] then
+                syllableend=current
+                current=getnext(current)
+                v=ischar(current,font)
+              end
+              if v and stress_tone_mark[v] then
+                syllableend=current
+                current=getnext(current)
+              end
+            end
+          end
+        else
+          local mark=mark_four[char]
+          if mark then
+            head,current=inject_syntax_error(head,current,mark)
+          end
+          current=getnext(current)
+        end
+      end
+    else
+      current=getnext(current)
+    end
+    start=false
+  end
+  if nbspaces>0 then
+    head=replace_all_nbsp(head)
+  end
+  head=tonode(head)
+  return head,done
+end
+function methods.dev2(head,font,attr)
+  head=tonut(head)
+  local current=head
+  local start=true
+  local done=false
+  local syllabe=0
+  local nbspaces=0
+  while current do
+    local syllablestart=nil
+    local syllableend=nil
+    local char=ischar(current,font)
+    if char then
+      done=true
+      syllablestart=current
+      local c=current
+      local n=getnext(current)
+      if n and ra[char] then
+        local nextchar=ischar(n,font)
+        if nextchar and halant[nextchar] then
+          local n=getnext(n)
+          if n then
+            local nextnextchar=ischar(n,font)
+            if nextnextchar then
+              c=n
+							char=nextnextchar
+            end
+          end
+        end
+      end
+      if independent_vowel[char] then
+        current=analyze_next_chars_one(c,font,1)
+        syllableend=current
+      else
+        local standalone=char==c_nbsp
+        if standalone then
+          nbspaces=nbspaces+1
+          local p=getprev(current)
+          if not p then
+          elseif ischar(p,font) then
+          elseif not separator[getchar(p)] then
+          else
+            standalone=false
+          end
+        end
+        if standalone then
+          current=analyze_next_chars_one(c,font,2)
+          syllableend=current
+        elseif consonant[getchar(current)] then
+          current=analyze_next_chars_two(current,font) 
+          syllableend=current
+        end
+      end
+    end
+    if syllableend then
+      syllabe=syllabe+1
+      local c=syllablestart
+      local n=getnext(syllableend)
+      while c~=n do
+        setprop(c,a_syllabe,syllabe)
+        c=getnext(c)
+      end
+    end
+    if syllableend and syllablestart~=syllableend then
+      head,current,nbspaces=dev2_reorder(head,syllablestart,syllableend,font,attr,nbspaces)
+    end
+    if not syllableend then
+      local char=ischar(current,font)
+      if char and not getprop(current,a_state) then
+        local mark=mark_four[char]
+        if mark then
+          head,current=inject_syntax_error(head,current,mark)
+        end
+      end
+    end
+    start=false
+    current=getnext(current)
+  end
+  if nbspaces>0 then
+    head=replace_all_nbsp(head)
+  end
+  head=tonode(head)
+  return head,done
+end
+methods.mlym=methods.deva
+methods.mlm2=methods.dev2
+
+end --- [luaotfload, fontloader-2017-02-11.lua scope for “font-osd”] ---
+
+
+do  --- [luaotfload, fontloader-2017-02-11.lua scope for “font-ocl” fbc00782e4efb24a7569f99cd1574ffb] ---
+
+if not modules then modules={} end modules ['font-ocl']={
+  version=1.001,
+  comment="companion to font-otf.lua (context)",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local tostring,next,format=tostring,next,string.format
+local round,max=math.round,math.round
+local formatters=string.formatters
+local tounicode=fonts.mappings.tounicode
+local otf=fonts.handlers.otf
+local f_color=formatters["pdf:direct:%f %f %f rg"]
+local f_gray=formatters["pdf:direct:%f g"]
+local s_black="pdf:direct:0 g"
+if context then
+  local startactualtext=nil
+  local stopactualtext=nil
+  function otf.getactualtext(s)
+    if not startactualtext then
+      startactualtext=backends.codeinjections.startunicodetoactualtextdirect
+      stopactualtext=backends.codeinjections.stopunicodetoactualtextdirect
+    end
+    return startactualtext(s),stopactualtext()
+  end
+else
+  local tounicode=fonts.mappings.tounicode16
+  function otf.getactualtext(s)
+    return
+      "/Span << /ActualText <feff"..n.."> >> BDC",
+      "EMC"
+  end
+end
+local sharedpalettes={}
+if context then
+  local graytorgb=attributes.colors.graytorgb
+  local cmyktorgb=attributes.colors.cmyktorgb
+  function otf.registerpalette(name,values)
+    sharedpalettes[name]=values
+    for i=1,#values do
+      local v=values[i]
+      local r,g,b
+      local s=v.s
+      if s then
+        r,g,b=graytorgb(s)
+      else
+        local c,m,y,k=v.c,v.m,v.y,v.k
+        if c or m or y or k then
+          r,g,b=cmyktorgb(c or 0,m or 0,y or 0,k or 0)
+        else
+          r,g,b=v.r,v.g,v.b
+        end
+      end
+      values[i]={
+        max(r and round(r*255) or 0,255),
+        max(g and round(g*255) or 0,255),
+        max(b and round(b*255) or 0,255)
+      }
+    end
+  end
+else 
+  function otf.registerpalette(name,values)
+    sharedpalettes[name]=values
+    for i=1,#values do
+      local v=values[i]
+      values[i]={
+        max(round((v.r or 0)*255),255),
+        max(round((v.g or 0)*255),255),
+        max(round((v.b or 0)*255),255)
+      }
+    end
+  end
+end
+local function initializecolr(tfmdata,kind,value) 
+  if value then
+    local palettes=tfmdata.resources.colorpalettes
+    if palettes then
+      local palette=sharedpalettes[value] or palettes[tonumber(value) or 1] or palettes[1] or {}
+      local classes=#palette
+      if classes==0 then
+        return
+      end
+      local characters=tfmdata.characters
+      local descriptions=tfmdata.descriptions
+      local properties=tfmdata.properties
+      local colorvalues={}
+      properties.virtualized=true
+      tfmdata.fonts={
+        { id=0 }
+      }
+      for i=1,classes do
+        local p=palette[i]
+        local r,g,b=p[1],p[2],p[3]
+        if r==g and g==b then
+          colorvalues[i]={ "special",f_gray(r/255) }
+        else
+          colorvalues[i]={ "special",f_color(r/255,g/255,b/255) }
+        end
+      end
+      local getactualtext=otf.getactualtext
+      for unicode,character in next,characters do
+        local description=descriptions[unicode]
+        if description then
+          local colorlist=description.colors
+          if colorlist then
+            local b,e=getactualtext(tounicode(characters[unicode].unicode or 0xFFFD))
+            local w=character.width or 0
+            local s=#colorlist
+            local t={
+              { "special","pdf:page:q" },
+              { "special","pdf:raw:"..b }
+            }
+            local n=#t
+            for i=1,s do
+              local entry=colorlist[i]
+              n=n+1 t[n]=colorvalues[entry.class] or s_black
+              n=n+1 t[n]={ "char",entry.slot }
+              if s>1 and i<s and w~=0 then
+                n=n+1 t[n]={ "right",-w }
+              end
+            end
+            n=n+1 t[n]={ "special","pdf:page:"..e }
+            n=n+1 t[n]={ "special","pdf:raw:Q" }
+            character.commands=t
+          end
+        end
+      end
+    end
+  end
+end
+fonts.handlers.otf.features.register {
+  name="colr",
+  description="color glyphs",
+  manipulators={
+    base=initializecolr,
+    node=initializecolr,
+  }
+}
+local otfsvg=otf.svg or {}
+otf.svg=otfsvg
+otf.svgenabled=true
+do
+  local nofstreams=0
+  local f_name=formatters[ [[svg-glyph-%05i]] ]
+  local f_used=context and formatters[ [[original:///%s]] ] or formatters[ [[%s]] ]
+  local cache={}
+  function otfsvg.storepdfdata(pdf)
+    nofstreams=nofstreams+1
+    local o,n=epdf.openMemStream(pdf,#pdf,f_name(nofstreams))
+    cache[n]=o 
+    return nil,f_used(n),nil
+  end
+  if context then
+    local storepdfdata=otfsvg.storepdfdata
+    local initialized=false
+    function otfsvg.storepdfdata(pdf)
+      if not initialized then
+        if resolvers.setmemstream then
+          local f_setstream=formatters[ [[resolvers.setmemstream("svg-glyph-%05i",%q,true)]] ]
+          local f_getstream=formatters[ [[memstream:///svg-glyph-%05i]] ]
+          local f_nilstream=formatters[ [[resolvers.resetmemstream("svg-glyph-%05i",true)]] ]
+          storepdfdata=function(pdf)
+            nofstreams=nofstreams+1
+            return
+              f_setstream(nofstreams,pdf),
+              f_getstream(nofstreams),
+              f_nilstream(nofstreams)
+          end
+          otfsvg.storepdfdata=storepdfdata
+        end
+        initialized=true
+      end
+      return storepdfdata(pdf)
+    end
+  end
+end
+do
+  local report_svg=logs.reporter("fonts","svg conversion")
+  local loaddata=io.loaddata
+  local savedata=io.savedata
+  local remove=os.remove
+  if context and xml.convert then
+    local xmlconvert=xml.convert
+    local xmlfirst=xml.first
+    function otfsvg.filterglyph(entry,index)
+      local svg=xmlconvert(entry.data)
+      local root=svg and xmlfirst(svg,"/svg[@id='glyph"..index.."']")
+      local data=root and tostring(root)
+      return data
+    end
+  else
+    function otfsvg.filterglyph(entry,index) 
+      return entry.data
+    end
+  end
+  function otfsvg.topdf(svgshapes)
+    local inkscape=io.popen("inkscape --shell > temp-otf-svg-shape.log","w")
+    local pdfshapes={}
+    local nofshapes=#svgshapes
+    local f_svgfile=formatters["temp-otf-svg-shape-%i.svg"]
+    local f_pdffile=formatters["temp-otf-svg-shape-%i.pdf"]
+    local f_convert=formatters["%s --export-pdf=%s\n"]
+    local filterglyph=otfsvg.filterglyph
+    report_svg("processing %i svg containers",nofshapes)
+    statistics.starttiming()
+    for i=1,nofshapes do
+      local entry=svgshapes[i]
+      for index=entry.first,entry.last do
+        local data=filterglyph(entry,index)
+        if data and data~="" then
+          local svgfile=f_svgfile(index)
+          local pdffile=f_pdffile(index)
+          savedata(svgfile,data)
+          inkscape:write(f_convert(svgfile,pdffile))
+          pdfshapes[index]=true
+        end
+      end
+    end
+    inkscape:write("quit\n")
+    inkscape:close()
+    report_svg("processing %i pdf results",nofshapes)
+    for index in next,pdfshapes do
+      local svgfile=f_svgfile(index)
+      local pdffile=f_pdffile(index)
+      pdfshapes[index]=loaddata(pdffile)
+      remove(svgfile)
+      remove(pdffile)
+    end
+    statistics.stoptiming()
+    if statistics.elapsedseconds then
+      report_svg("svg conversion time %s",statistics.elapsedseconds())
+    end
+    return pdfshapes
+  end
+end
+local function initializesvg(tfmdata,kind,value) 
+  if value and otf.svgenabled then
+    local characters=tfmdata.characters
+    local descriptions=tfmdata.descriptions
+    local properties=tfmdata.properties
+    local svg=properties.svg
+    local hash=svg and svg.hash
+    local timestamp=svg and svg.timestamp
+    if not hash then
+      return
+    end
+    local pdffile=containers.read(otf.pdfcache,hash)
+    local pdfshapes=pdffile and pdffile.pdfshapes
+    if not pdfshapes or pdffile.timestamp~=timestamp then
+      local svgfile=containers.read(otf.svgcache,hash)
+      local svgshapes=svgfile and svgfile.svgshapes
+      pdfshapes=svgshapes and otfsvg.topdf(svgshapes) or {}
+      containers.write(otf.pdfcache,hash,{
+        pdfshapes=pdfshapes,
+        timestamp=timestamp,
+      })
+    end
+    if not pdfshapes or not next(pdfshapes) then
+      return
+    end
+    properties.virtualized=true
+    tfmdata.fonts={
+      { id=0 }
+    }
+    local getactualtext=otf.getactualtext
+    local storepdfdata=otfsvg.storepdfdata
+    local nop={ "nop" }
+    for unicode,character in next,characters do
+      local index=character.index
+      if index then
+        local pdf=pdfshapes[index]
+        if pdf then
+          local setcode,name,nilcode=storepdfdata(pdf)
+          if name then
+            local bt,et=getactualtext(unicode)
+            local wd=character.width or 0
+            local ht=character.height or 0
+            local dp=character.depth or 0
+            character.commands={
+              { "special","pdf:direct:"..bt },
+              { "down",dp },
+              setcode and { "lua",setcode } or nop,
+              { "image",{ filename=name,width=wd,height=ht,depth=dp } },
+              nilcode and { "lua",nilcode } or nop,
+              { "special","pdf:direct:"..et },
+            }
+            character.svg=true
+          end
+        end
+      end
+    end
+  end
+end
+fonts.handlers.otf.features.register {
+  name="svg",
+  description="svg glyphs",
+  manipulators={
+    base=initializesvg,
+    node=initializesvg,
+  }
+}
+
+end --- [luaotfload, fontloader-2017-02-11.lua scope for “font-ocl”] ---
+
+
+do  --- [luaotfload, fontloader-2017-02-11.lua scope for “font-otc” 85d63e257c748c624768aa7c8ec7f0bc] ---
+
+if not modules then modules={} end modules ['font-otc']={
+  version=1.001,
+  comment="companion to font-otf.lua (context)",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local format,insert,sortedkeys,tohash=string.format,table.insert,table.sortedkeys,table.tohash
+local type,next=type,next
+local lpegmatch=lpeg.match
+local utfbyte,utflen=utf.byte,utf.len
+local trace_loading=false trackers.register("otf.loading",function(v) trace_loading=v end)
+local report_otf=logs.reporter("fonts","otf loading")
+local fonts=fonts
+local otf=fonts.handlers.otf
+local registerotffeature=otf.features.register
+local setmetatableindex=table.setmetatableindex
+local normalized={
+  substitution="substitution",
+  single="substitution",
+  ligature="ligature",
+  alternate="alternate",
+  multiple="multiple",
+  kern="kern",
+  pair="pair",
+  chainsubstitution="chainsubstitution",
+  chainposition="chainposition",
+}
+local types={
+  substitution="gsub_single",
+  ligature="gsub_ligature",
+  alternate="gsub_alternate",
+  multiple="gsub_multiple",
+  kern="gpos_pair",
+  pair="gpos_pair",
+  chainsubstitution="gsub_contextchain",
+  chainposition="gpos_contextchain",
+}
+local names={
+  gsub_single="gsub",
+  gsub_multiple="gsub",
+  gsub_alternate="gsub",
+  gsub_ligature="gsub",
+  gsub_context="gsub",
+  gsub_contextchain="gsub",
+  gsub_reversecontextchain="gsub",
+  gpos_single="gpos",
+  gpos_pair="gpos",
+  gpos_cursive="gpos",
+  gpos_mark2base="gpos",
+  gpos_mark2ligature="gpos",
+  gpos_mark2mark="gpos",
+  gpos_context="gpos",
+  gpos_contextchain="gpos",
+}
+setmetatableindex(types,function(t,k) t[k]=k return k end) 
+local everywhere={ ["*"]={ ["*"]=true } } 
+local noflags={ false,false,false,false }
+local function getrange(sequences,category)
+  local count=#sequences
+  local first=nil
+  local last=nil
+  for i=1,count do
+    local t=sequences[i].type
+    if t and names[t]==category then
+      if not first then
+        first=i
+      end
+      last=i
+    end
+  end
+  return first or 1,last or count
+end
+local function validspecification(specification,name)
+  local dataset=specification.dataset
+  if dataset then
+  elseif specification[1] then
+    dataset=specification
+    specification={ dataset=dataset }
+  else
+    dataset={ { data=specification.data } }
+    specification.data=nil
+    specification.dataset=dataset
+  end
+  local first=dataset[1]
+  if first then
+    first=first.data
+  end
+  if not first then
+    report_otf("invalid feature specification, no dataset")
+    return
+  end
+  if type(name)~="string" then
+    name=specification.name or first.name
+  end
+  if type(name)~="string" then
+    report_otf("invalid feature specification, no name")
+    return
+  end
+  local n=#dataset
+  if n>0 then
+    for i=1,n do
+      setmetatableindex(dataset[i],specification)
+    end
+    return specification,name
+  end
+end
+local function addfeature(data,feature,specifications)
+  if not specifications then
+    report_otf("missing specification")
+    return
+  end
+  local descriptions=data.descriptions
+  local resources=data.resources
+  local features=resources.features
+  local sequences=resources.sequences
+  if not features or not sequences then
+    report_otf("missing specification")
+    return
+  end
+  local alreadydone=resources.alreadydone
+  if not alreadydone then
+    alreadydone={}
+    resources.alreadydone=alreadydone
+  end
+  if alreadydone[specifications] then
+    return
+  else
+    alreadydone[specifications]=true
+  end
+  local fontfeatures=resources.features or everywhere
+  local unicodes=resources.unicodes
+  local splitter=lpeg.splitter(" ",unicodes)
+  local done=0
+  local skip=0
+  local aglunicodes=false
+  local specifications=validspecification(specifications,feature)
+  if not specifications then
+    return
+  end
+  local function tounicode(code)
+    if not code then
+      return
+    end
+    if type(code)=="number" then
+      return code
+    end
+    local u=unicodes[code]
+    if u then
+      return u
+    end
+    if utflen(code)==1 then
+      u=utfbyte(code)
+      if u then
+        return u
+      end
+    end
+    if not aglunicodes then
+      aglunicodes=fonts.encodings.agl.unicodes 
+    end
+    return aglunicodes[code]
+  end
+  local coverup=otf.coverup
+  local coveractions=coverup.actions
+  local stepkey=coverup.stepkey
+  local register=coverup.register
+  local function prepare_substitution(list,featuretype)
+    local coverage={}
+    local cover=coveractions[featuretype]
+    for code,replacement in next,list do
+      local unicode=tounicode(code)
+      local description=descriptions[unicode]
+      if description then
+        if type(replacement)=="table" then
+          replacement=replacement[1]
+        end
+        replacement=tounicode(replacement)
+        if replacement and descriptions[replacement] then
+          cover(coverage,unicode,replacement)
+          done=done+1
+        else
+          skip=skip+1
+        end
+      else
+        skip=skip+1
+      end
+    end
+    return coverage
+  end
+  local function prepare_alternate(list,featuretype)
+    local coverage={}
+    local cover=coveractions[featuretype]
+    for code,replacement in next,list do
+      local unicode=tounicode(code)
+      local description=descriptions[unicode]
+      if not description then
+        skip=skip+1
+      elseif type(replacement)=="table" then
+        local r={}
+        for i=1,#replacement do
+          local u=tounicode(replacement[i])
+          r[i]=descriptions[u] and u or unicode
+        end
+        cover(coverage,unicode,r)
+        done=done+1
+      else
+        local u=tounicode(replacement)
+        if u then
+          cover(coverage,unicode,{ u })
+          done=done+1
+        else
+          skip=skip+1
+        end
+      end
+    end
+    return coverage
+  end
+  local function prepare_multiple(list,featuretype)
+    local coverage={}
+    local cover=coveractions[featuretype]
+    for code,replacement in next,list do
+      local unicode=tounicode(code)
+      local description=descriptions[unicode]
+      if not description then
+        skip=skip+1
+      elseif type(replacement)=="table" then
+        local r,n={},0
+        for i=1,#replacement do
+          local u=tounicode(replacement[i])
+          if descriptions[u] then
+            n=n+1
+            r[n]=u
+          end
+        end
+        if n>0 then
+          cover(coverage,unicode,r)
+          done=done+1
+        else
+          skip=skip+1
+        end
+      else
+        local u=tounicode(replacement)
+        if u then
+          cover(coverage,unicode,{ u })
+          done=done+1
+        else
+          skip=skip+1
+        end
+      end
+    end
+    return coverage
+  end
+  local function prepare_ligature(list,featuretype)
+    local coverage={}
+    local cover=coveractions[featuretype]
+    for code,ligature in next,list do
+      local unicode=tounicode(code)
+      local description=descriptions[unicode]
+      if description then
+        if type(ligature)=="string" then
+          ligature={ lpegmatch(splitter,ligature) }
+        end
+        local present=true
+        for i=1,#ligature do
+          local l=ligature[i]
+          local u=tounicode(l)
+          if descriptions[u] then
+            ligature[i]=u
+          else
+            present=false
+            break
+          end
+        end
+        if present then
+          cover(coverage,unicode,ligature)
+          done=done+1
+        else
+          skip=skip+1
+        end
+      else
+        skip=skip+1
+      end
+    end
+    return coverage
+  end
+  local function prepare_kern(list,featuretype)
+    local coverage={}
+    local cover=coveractions[featuretype]
+    for code,replacement in next,list do
+      local unicode=tounicode(code)
+      local description=descriptions[unicode]
+      if description and type(replacement)=="table" then
+        local r={}
+        for k,v in next,replacement do
+          local u=tounicode(k)
+          if u then
+            r[u]=v
+          end
+        end
+        if next(r) then
+          cover(coverage,unicode,r)
+          done=done+1
+        else
+          skip=skip+1
+        end
+      else
+        skip=skip+1
+      end
+    end
+    return coverage
+  end
+  local function prepare_pair(list,featuretype)
+    local coverage={}
+    local cover=coveractions[featuretype]
+    if cover then
+      for code,replacement in next,list do
+        local unicode=tounicode(code)
+        local description=descriptions[unicode]
+        if description and type(replacement)=="table" then
+          local r={}
+          for k,v in next,replacement do
+            local u=tounicode(k)
+            if u then
+              r[u]=v
+            end
+          end
+          if next(r) then
+            cover(coverage,unicode,r)
+            done=done+1
+          else
+            skip=skip+1
+          end
+        else
+          skip=skip+1
+        end
+      end
+    else
+      report_otf("unknown cover type %a",featuretype)
+    end
+    return coverage
+  end
+  local function prepare_chain(list,featuretype,sublookups)
+    local rules=list.rules
+    local coverage={}
+    if rules then
+      local rulehash={}
+      local rulesize=0
+      local sequence={}
+      local nofsequences=0
+      local lookuptype=types[featuretype]
+      for nofrules=1,#rules do
+        local rule=rules[nofrules]
+        local current=rule.current
+        local before=rule.before
+        local after=rule.after
+        local replacements=rule.replacements or false
+        local sequence={}
+        local nofsequences=0
+        if before then
+          for n=1,#before do
+            nofsequences=nofsequences+1
+            sequence[nofsequences]=before[n]
+          end
+        end
+        local start=nofsequences+1
+        for n=1,#current do
+          nofsequences=nofsequences+1
+          sequence[nofsequences]=current[n]
+        end
+        local stop=nofsequences
+        if after then
+          for n=1,#after do
+            nofsequences=nofsequences+1
+            sequence[nofsequences]=after[n]
+          end
+        end
+        local lookups=rule.lookups or false
+        local subtype=nil
+        if lookups and sublookups then
+          for k,v in next,lookups do
+            local lookup=sublookups[v]
+            if lookup then
+              lookups[k]=lookup
+              if not subtype then
+                subtype=lookup.type
+              end
+            else
+            end
+          end
+        end
+        if nofsequences>0 then
+          local hashed={}
+          for i=1,nofsequences do
+            local t={}
+            local s=sequence[i]
+            for i=1,#s do
+              local u=tounicode(s[i])
+              if u then
+                t[u]=true
+              end
+            end
+            hashed[i]=t
+          end
+          sequence=hashed
+          rulesize=rulesize+1
+          rulehash[rulesize]={
+            nofrules,
+            lookuptype,
+            sequence,
+            start,
+            stop,
+            lookups,
+            replacements,
+            subtype,
+          }
+          for unic in next,sequence[start] do
+            local cu=coverage[unic]
+            if not cu then
+              coverage[unic]=rulehash 
+            end
+          end
+        end
+      end
+    end
+    return coverage
+  end
+  local dataset=specifications.dataset
+  local function report(name,category,position,first,last,sequences)
+    report_otf("injecting name %a of category %a at position %i in [%i,%i] of [%i,%i]",
+      name,category,position,first,last,1,#sequences)
+  end
+  local function inject(specification,sequences,sequence,first,last,category,name)
+    local position=specification.position or false
+    if not position then
+      position=specification.prepend
+      if position==true then
+        if trace_loading then
+          report(name,category,first,first,last,sequences)
+        end
+        insert(sequences,first,sequence)
+        return
+      end
+    end
+    if not position then
+      position=specification.append
+      if position==true then
+        if trace_loading then
+          report(name,category,last+1,first,last,sequences)
+        end
+        insert(sequences,last+1,sequence)
+        return
+      end
+    end
+    local kind=type(position)
+    if kind=="string" then
+      local index=false
+      for i=first,last do
+        local s=sequences[i]
+        local f=s.features
+        if f then
+          for k in next,f do
+            if k==position then
+              index=i
+              break
+            end
+          end
+          if index then
+            break
+          end
+        end
+      end
+      if index then
+        position=index
+      else
+        position=last+1
+      end
+    elseif kind=="number" then
+      if position<0 then
+        position=last-position+1
+      end
+      if position>last then
+        position=last+1
+      elseif position<first then
+        position=first
+      end
+    else
+      position=last+1
+    end
+    if trace_loading then
+      report(name,category,position,first,last,sequences)
+    end
+    insert(sequences,position,sequence)
+  end
+  for s=1,#dataset do
+    local specification=dataset[s]
+    local valid=specification.valid 
+    local feature=specification.name or feature
+    if not feature or feature=="" then
+      report_otf("no valid name given for extra feature")
+    elseif not valid or valid(data,specification,feature) then 
+      local initialize=specification.initialize
+      if initialize then
+        specification.initialize=initialize(specification,data) and initialize or nil
+      end
+      local askedfeatures=specification.features or everywhere
+      local askedsteps=specification.steps or specification.subtables or { specification.data } or {}
+      local featuretype=normalized[specification.type or "substitution"] or "substitution"
+      local featureflags=specification.flags or noflags
+      local featureorder=specification.order or { feature }
+      local featurechain=(featuretype=="chainsubstitution" or featuretype=="chainposition") and 1 or 0
+      local nofsteps=0
+      local steps={}
+      local sublookups=specification.lookups
+      local category=nil
+      if sublookups then
+        local s={}
+        for i=1,#sublookups do
+          local specification=sublookups[i]
+          local askedsteps=specification.steps or specification.subtables or { specification.data } or {}
+          local featuretype=normalized[specification.type or "substitution"] or "substitution"
+          local featureflags=specification.flags or noflags
+          local nofsteps=0
+          local steps={}
+          for i=1,#askedsteps do
+            local list=askedsteps[i]
+            local coverage=nil
+            local format=nil
+            if featuretype=="substitution" then
+              coverage=prepare_substitution(list,featuretype)
+            elseif featuretype=="ligature" then
+              coverage=prepare_ligature(list,featuretype)
+            elseif featuretype=="alternate" then
+              coverage=prepare_alternate(list,featuretype)
+            elseif featuretype=="multiple" then
+              coverage=prepare_multiple(list,featuretype)
+            elseif featuretype=="kern" then
+              format="kern"
+              coverage=prepare_kern(list,featuretype)
+            elseif featuretype=="pair" then
+              format="pair"
+              coverage=prepare_pair(list,featuretype)
+            end
+            if coverage and next(coverage) then
+              nofsteps=nofsteps+1
+              steps[nofsteps]=register(coverage,featuretype,format,feature,nofsteps,descriptions,resources)
+            end
+          end
+          s[i]={
+            [stepkey]=steps,
+            nofsteps=nofsteps,
+            type=types[featuretype],
+          }
+        end
+        sublookups=s
+      end
+      for i=1,#askedsteps do
+        local list=askedsteps[i]
+        local coverage=nil
+        local format=nil
+        if featuretype=="substitution" then
+          category="gsub"
+          coverage=prepare_substitution(list,featuretype)
+        elseif featuretype=="ligature" then
+          category="gsub"
+          coverage=prepare_ligature(list,featuretype)
+        elseif featuretype=="alternate" then
+          category="gsub"
+          coverage=prepare_alternate(list,featuretype)
+        elseif featuretype=="multiple" then
+          category="gsub"
+          coverage=prepare_multiple(list,featuretype)
+        elseif featuretype=="kern" then
+          category="gpos"
+          format="kern"
+          coverage=prepare_kern(list,featuretype)
+        elseif featuretype=="pair" then
+          category="gpos"
+          format="pair"
+          coverage=prepare_pair(list,featuretype)
+        elseif featuretype=="chainsubstitution" then
+          category="gsub"
+          coverage=prepare_chain(list,featuretype,sublookups)
+        elseif featuretype=="chainposition" then
+          category="gpos"
+          coverage=prepare_chain(list,featuretype,sublookups)
+        else
+          report_otf("not registering feature %a, unknown category",feature)
+          return
+        end
+        if coverage and next(coverage) then
+          nofsteps=nofsteps+1
+          steps[nofsteps]=register(coverage,featuretype,format,feature,nofsteps,descriptions,resources)
+        end
+      end
+      if nofsteps>0 then
+        for k,v in next,askedfeatures do
+          if v[1] then
+            askedfeatures[k]=tohash(v)
+          end
+        end
+        if featureflags[1] then featureflags[1]="mark" end
+        if featureflags[2] then featureflags[2]="ligature" end
+        if featureflags[3] then featureflags[3]="base" end
+        local steptype=types[featuretype]
+        local sequence={
+          chain=featurechain,
+          features={ [feature]=askedfeatures },
+          flags=featureflags,
+          name=feature,
+          order=featureorder,
+          [stepkey]=steps,
+          nofsteps=nofsteps,
+          type=steptype,
+        }
+        local first,last=getrange(sequences,category)
+        inject(specification,sequences,sequence,first,last,category,feature)
+        local features=fontfeatures[category]
+        if not features then
+          features={}
+          fontfeatures[category]=features
+        end
+        local k=features[feature]
+        if not k then
+          k={}
+          features[feature]=k
+        end
+        for script,languages in next,askedfeatures do
+          local kk=k[script]
+          if not kk then
+            kk={}
+            k[script]=kk
+          end
+          for language,value in next,languages do
+            kk[language]=value
+          end
+        end
+      end
+    end
+  end
+  if trace_loading then
+    report_otf("registering feature %a, affected glyphs %a, skipped glyphs %a",feature,done,skip)
+  end
+end
+otf.enhancers.addfeature=addfeature
+local extrafeatures={}
+local knownfeatures={}
+function otf.addfeature(name,specification)
+  if type(name)=="table" then
+    specification=name
+  end
+  if type(specification)~="table" then
+    report_otf("invalid feature specification, no valid table")
+    return
+  end
+  specification,name=validspecification(specification,name)
+  if name and specification then
+    local slot=knownfeatures[name]
+    if slot then
+    else
+      slot=#extrafeatures+1
+      knownfeatures[name]=slot
+    end
+    specification.name=name 
+    extrafeatures[slot]=specification
+  end
+end
+local function enhance(data,filename,raw)
+  for slot=1,#extrafeatures do
+    local specification=extrafeatures[slot]
+    addfeature(data,specification.name,specification)
+  end
+end
+otf.enhancers.enhance=enhance
+otf.enhancers.register("check extra features",enhance)
+local tlig={
+  [0x2013]={ 0x002D,0x002D },
+  [0x2014]={ 0x002D,0x002D,0x002D },
+}
+local tlig_specification={
+  type="ligature",
+  features=everywhere,
+  data=tlig,
+  order={ "tlig" },
+  flags=noflags,
+  prepend=true,
+}
+otf.addfeature("tlig",tlig_specification)
+registerotffeature {
+  name='tlig',
+  description='tex ligatures',
+}
+local trep={
+  [0x0027]=0x2019,
+}
+local trep_specification={
+  type="substitution",
+  features=everywhere,
+  data=trep,
+  order={ "trep" },
+  flags=noflags,
+  prepend=true,
+}
+otf.addfeature("trep",trep_specification)
+registerotffeature {
+  name='trep',
+  description='tex replacements',
+}
+local anum_arabic={
+  [0x0030]=0x0660,
+  [0x0031]=0x0661,
+  [0x0032]=0x0662,
+  [0x0033]=0x0663,
+  [0x0034]=0x0664,
+  [0x0035]=0x0665,
+  [0x0036]=0x0666,
+  [0x0037]=0x0667,
+  [0x0038]=0x0668,
+  [0x0039]=0x0669,
+}
+local anum_persian={
+  [0x0030]=0x06F0,
+  [0x0031]=0x06F1,
+  [0x0032]=0x06F2,
+  [0x0033]=0x06F3,
+  [0x0034]=0x06F4,
+  [0x0035]=0x06F5,
+  [0x0036]=0x06F6,
+  [0x0037]=0x06F7,
+  [0x0038]=0x06F8,
+  [0x0039]=0x06F9,
+}
+local function valid(data)
+  local features=data.resources.features
+  if features then
+    for k,v in next,features do
+      for k,v in next,v do
+        if v.arab then
+          return true
+        end
+      end
+    end
+  end
+end
+local anum_specification={
+  {
+    type="substitution",
+    features={ arab={ urd=true,dflt=true } },
+    order={ "anum" },
+    data=anum_arabic,
+    flags=noflags,
+    valid=valid,
+  },
+  {
+    type="substitution",
+    features={ arab={ urd=true } },
+    order={ "anum" },
+    data=anum_persian,
+    flags=noflags,
+    valid=valid,
+  },
+}
+otf.addfeature("anum",anum_specification) 
+registerotffeature {
+  name='anum',
+  description='arabic digits',
+}
+
+end --- [luaotfload, fontloader-2017-02-11.lua scope for “font-otc”] ---
+
+
+do  --- [luaotfload, fontloader-2017-02-11.lua scope for “font-onr” 205c8bc640715aecf3538a33b842f450] ---
+
+if not modules then modules={} end modules ['font-onr']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local fonts,logs,trackers,resolvers=fonts,logs,trackers,resolvers
+local next,type,tonumber,rawget,rawset=next,type,tonumber,rawget,rawset
+local match,lower,gsub,strip,find=string.match,string.lower,string.gsub,string.strip,string.find
+local char,byte,sub=string.char,string.byte,string.sub
+local abs=math.abs
+local bxor,rshift=bit32.bxor,bit32.rshift
+local P,S,R,Cmt,C,Ct,Cs,Carg,Cf,Cg=lpeg.P,lpeg.S,lpeg.R,lpeg.Cmt,lpeg.C,lpeg.Ct,lpeg.Cs,lpeg.Carg,lpeg.Cf,lpeg.Cg
+local lpegmatch,patterns=lpeg.match,lpeg.patterns
+local trace_indexing=false trackers.register("afm.indexing",function(v) trace_indexing=v end)
+local trace_loading=false trackers.register("afm.loading",function(v) trace_loading=v end)
+local report_afm=logs.reporter("fonts","afm loading")
+local report_pfb=logs.reporter("fonts","pfb loading")
+local handlers=fonts.handlers
+local afm=handlers.afm or {}
+handlers.afm=afm
+local readers=afm.readers or {}
+afm.readers=readers
+afm.version=1.512
+local get_indexes,get_shapes
+do
+  local decrypt
+  do
+    local r,c1,c2,n=0,0,0,0
+    local function step(c)
+      local cipher=byte(c)
+      local plain=bxor(cipher,rshift(r,8))
+      r=((cipher+r)*c1+c2)%65536
+      return char(plain)
+    end
+    decrypt=function(binary,initial,seed)
+      r,c1,c2,n=initial,52845,22719,seed
+      binary=gsub(binary,".",step)
+      return sub(binary,n+1)
+    end
+  end
+  local charstrings=P("/CharStrings")
+  local subroutines=P("/Subrs")
+  local encoding=P("/Encoding")
+  local dup=P("dup")
+  local put=P("put")
+  local array=P("array")
+  local name=P("/")*C((R("az")+R("AZ")+R("09")+S("-_."))^1)
+  local digits=R("09")^1
+  local cardinal=digits/tonumber
+  local spaces=P(" ")^1
+  local spacing=patterns.whitespace^0
+  local routines,vector,chars,n,m
+  local initialize=function(str,position,size)
+    n=0
+    m=size 
+    return position+1
+  end
+  local setroutine=function(str,position,index,size)
+    local forward=position+tonumber(size)
+    local stream=sub(str,position+1,forward)
+    routines[index]=decrypt(stream,4330,4)
+    return forward
+  end
+  local setvector=function(str,position,name,size)
+    local forward=position+tonumber(size)
+    if n>=m then
+      return #str
+    elseif forward<#str then
+      vector[n]=name
+      n=n+1 
+      return forward
+    else
+      return #str
+    end
+  end
+  local setshapes=function(str,position,name,size)
+    local forward=position+tonumber(size)
+    local stream=sub(str,position+1,forward)
+    if n>m then
+      return #str
+    elseif forward<#str then
+      vector[n]=name
+      n=n+1
+      chars [n]=decrypt(stream,4330,4)
+      return forward
+    else
+      return #str
+    end
+  end
+  local p_rd=spacing*(P("RD")+P("-|"))
+  local p_np=spacing*(P("NP")+P("|"))
+  local p_nd=spacing*(P("ND")+P("|"))
+  local p_filterroutines=
+    (1-subroutines)^0*subroutines*spaces*Cmt(cardinal,initialize)*(Cmt(cardinal*spaces*cardinal*p_rd,setroutine)*p_np+P(1))^1
+  local p_filtershapes=
+    (1-charstrings)^0*charstrings*spaces*Cmt(cardinal,initialize)*(Cmt(name*spaces*cardinal*p_rd,setshapes)*p_nd+P(1))^1
+  local p_filternames=Ct (
+    (1-charstrings)^0*charstrings*spaces*Cmt(cardinal,initialize)*(Cmt(name*spaces*cardinal,setvector)+P(1))^1
+  )
+  local p_filterencoding=(1-encoding)^0*encoding*spaces*digits*spaces*array*(1-dup)^0*Cf(
+      Ct("")*Cg(spacing*dup*spaces*cardinal*spaces*name*spaces*put)^1
+,rawset)
+  local function loadpfbvector(filename,shapestoo)
+    local data=io.loaddata(resolvers.findfile(filename))
+    if not data then
+      report_pfb("no data in %a",filename)
+      return
+    end
+    if not (find(data,"!PS%-AdobeFont%-") or find(data,"%%!FontType1")) then
+      report_pfb("no font in %a",filename)
+      return
+    end
+    local ascii,binary=match(data,"(.*)eexec%s+......(.*)")
+    if not binary then
+      report_pfb("no binary data in %a",filename)
+      return
+    end
+    binary=decrypt(binary,55665,4)
+    local names={}
+    local encoding=lpegmatch(p_filterencoding,ascii)
+    local glyphs={}
+    routines,vector,chars={},{},{}
+    if shapestoo then
+      lpegmatch(p_filterroutines,binary)
+      lpegmatch(p_filtershapes,binary)
+      local data={
+        dictionaries={
+          {
+            charstrings=chars,
+            charset=vector,
+            subroutines=routines,
+          }
+        },
+      }
+      fonts.handlers.otf.readers.parsecharstrings(data,glyphs,true,true)
+    else
+      lpegmatch(p_filternames,binary)
+    end
+    names=vector
+    routines,vector,chars=nil,nil,nil
+    return names,encoding,glyphs
+  end
+  local pfb=handlers.pfb or {}
+  handlers.pfb=pfb
+  pfb.loadvector=loadpfbvector
+  get_indexes=function(data,pfbname)
+    local vector=loadpfbvector(pfbname)
+    if vector then
+      local characters=data.characters
+      if trace_loading then
+        report_afm("getting index data from %a",pfbname)
+      end
+      for index=1,#vector do
+        local name=vector[index]
+        local char=characters[name]
+        if char then
+          if trace_indexing then
+            report_afm("glyph %a has index %a",name,index)
+          end
+          char.index=index
+        end
+      end
+    end
+  end
+  get_shapes=function(pfbname)
+    local vector,encoding,glyphs=loadpfbvector(pfbname,true)
+    return glyphs
+  end
+end
+local spacer=patterns.spacer
+local whitespace=patterns.whitespace
+local lineend=patterns.newline
+local spacing=spacer^0
+local number=spacing*S("+-")^-1*(R("09")+S("."))^1/tonumber
+local name=spacing*C((1-whitespace)^1)
+local words=spacing*((1-lineend)^1/strip)
+local rest=(1-lineend)^0
+local fontdata=Carg(1)
+local semicolon=spacing*P(";")
+local plus=spacing*P("plus")*number
+local minus=spacing*P("minus")*number
+local function addkernpair(data,one,two,value)
+  local chr=data.characters[one]
+  if chr then
+    local kerns=chr.kerns
+    if kerns then
+      kerns[two]=tonumber(value)
+    else
+      chr.kerns={ [two]=tonumber(value) }
+    end
+  end
+end
+local p_kernpair=(fontdata*P("KPX")*name*name*number)/addkernpair
+local chr=false
+local ind=0
+local function start(data,version)
+  data.metadata.afmversion=version
+  ind=0
+  chr={}
+end
+local function stop()
+  ind=0
+  chr=false
+end
+local function setindex(i)
+  if i<0 then
+    ind=ind+1 
+  else
+    ind=i
+  end
+  chr={
+    index=ind
+  }
+end
+local function setwidth(width)
+  chr.width=width
+end
+local function setname(data,name)
+  data.characters[name]=chr
+end
+local function setboundingbox(boundingbox)
+  chr.boundingbox=boundingbox
+end
+local function setligature(plus,becomes)
+  local ligatures=chr.ligatures
+  if ligatures then
+    ligatures[plus]=becomes
+  else
+    chr.ligatures={ [plus]=becomes }
+  end
+end
+local p_charmetric=((
+  P("C")*number/setindex+P("WX")*number/setwidth+P("N")*fontdata*name/setname+P("B")*Ct((number)^4)/setboundingbox+P("L")*(name)^2/setligature
+ )*semicolon )^1
+local p_charmetrics=P("StartCharMetrics")*number*(p_charmetric+(1-P("EndCharMetrics")))^0*P("EndCharMetrics")
+local p_kernpairs=P("StartKernPairs")*number*(p_kernpair+(1-P("EndKernPairs" )))^0*P("EndKernPairs" )
+local function set_1(data,key,a)   data.metadata[lower(key)]=a      end
+local function set_2(data,key,a,b)  data.metadata[lower(key)]={ a,b }  end
+local function set_3(data,key,a,b,c) data.metadata[lower(key)]={ a,b,c } end
+local p_parameters=P(false)+fontdata*((P("FontName")+P("FullName")+P("FamilyName"))/lower)*words/function(data,key,value)
+    data.metadata[key]=value
+  end+fontdata*((P("Weight")+P("Version"))/lower)*name/function(data,key,value)
+    data.metadata[key]=value
+  end+fontdata*P("IsFixedPitch")*name/function(data,pitch)
+    data.metadata.monospaced=toboolean(pitch,true)
+  end+fontdata*P("FontBBox")*Ct(number^4)/function(data,boundingbox)
+    data.metadata.boundingbox=boundingbox
+ end+fontdata*((P("CharWidth")+P("CapHeight")+P("XHeight")+P("Descender")+P("Ascender")+P("ItalicAngle"))/lower)*number/function(data,key,value)
+    data.metadata[key]=value
+  end+P("Comment")*spacing*(P(false)+(fontdata*C("DESIGNSIZE")*number*rest)/set_1 
++(fontdata*C("TFM designsize")*number*rest)/set_1+(fontdata*C("DesignSize")*number*rest)/set_1+(fontdata*C("CODINGSCHEME")*words*rest)/set_1 
++(fontdata*C("CHECKSUM")*number*words*rest)/set_1 
++(fontdata*C("SPACE")*number*plus*minus*rest)/set_3 
++(fontdata*C("QUAD")*number*rest)/set_1 
++(fontdata*C("EXTRASPACE")*number*rest)/set_1 
++(fontdata*C("NUM")*number*number*number*rest)/set_3 
++(fontdata*C("DENOM")*number*number*rest)/set_2 
++(fontdata*C("SUP")*number*number*number*rest)/set_3 
++(fontdata*C("SUB")*number*number*rest)/set_2 
++(fontdata*C("SUPDROP")*number*rest)/set_1 
++(fontdata*C("SUBDROP")*number*rest)/set_1 
++(fontdata*C("DELIM")*number*number*rest)/set_2 
++(fontdata*C("AXISHEIGHT")*number*rest)/set_1 
+  )
+local fullparser=(P("StartFontMetrics")*fontdata*name/start )*(p_charmetrics+p_kernpairs+p_parameters+(1-P("EndFontMetrics")) )^0*(P("EndFontMetrics")/stop )
+local fullparser=(P("StartFontMetrics")*fontdata*name/start )*(p_charmetrics+p_kernpairs+p_parameters+(1-P("EndFontMetrics")) )^0*(P("EndFontMetrics")/stop )
+local infoparser=(P("StartFontMetrics")*fontdata*name/start )*(p_parameters+(1-P("EndFontMetrics")) )^0*(P("EndFontMetrics")/stop )
+local function read(filename,parser)
+  local afmblob=io.loaddata(filename)
+  if afmblob then
+    local data={
+      resources={
+        filename=resolvers.unresolve(filename),
+        version=afm.version,
+        creator="context mkiv",
+      },
+      properties={
+        hasitalics=false,
+      },
+      goodies={},
+      metadata={
+        filename=file.removesuffix(file.basename(filename))
+      },
+      characters={
+      },
+      descriptions={
+      },
+    }
+    if trace_loading then
+      report_afm("parsing afm file %a",filename)
+    end
+    lpegmatch(parser,afmblob,1,data)
+    return data
+  else
+    if trace_loading then
+      report_afm("no valid afm file %a",filename)
+    end
+    return nil
+  end
+end
+function readers.loadfont(afmname,pfbname)
+  local data=read(resolvers.findfile(afmname),fullparser)
+  if data then
+    if not pfbname or pfbname=="" then
+      pfbname=file.replacesuffix(file.nameonly(afmname),"pfb")
+      pfbname=resolvers.findfile(pfbname)
+    end
+    if pfbname and pfbname~="" then
+      data.resources.filename=resolvers.unresolve(pfbname)
+      get_indexes(data,pfbname)
+    elseif trace_loading then
+      report_afm("no pfb file for %a",afmname)
+    end
+    return data
+  end
+end
+function readers.loadshapes(filename)
+  local fullname=resolvers.findfile(filename) or ""
+  if fullname=="" then
+    return {
+      filename="not found: "..filename,
+      glyphs={}
+    }
+  else
+    return {
+      filename=fullname,
+      format="opentype",
+      glyphs=get_shapes(fullname) or {},
+      units=1000,
+    }
+  end
+end
+function readers.getinfo(filename)
+  local data=read(resolvers.findfile(filename),infoparser)
+  if data then
+    return data.metadata
+  end
+end
+
+end --- [luaotfload, fontloader-2017-02-11.lua scope for “font-onr”] ---
+
+
+do  --- [luaotfload, fontloader-2017-02-11.lua scope for “font-one” 6fbf6b9e219a944cd1ad5933d77cc488] ---
+
+if not modules then modules={} end modules ['font-one']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local fonts,logs,trackers,containers,resolvers=fonts,logs,trackers,containers,resolvers
+local next,type,tonumber,rawget=next,type,tonumber,rawget
+local match,gmatch,lower,gsub,strip,find=string.match,string.gmatch,string.lower,string.gsub,string.strip,string.find
+local char,byte,sub=string.char,string.byte,string.sub
+local abs=math.abs
+local bxor,rshift=bit32.bxor,bit32.rshift
+local P,S,R,Cmt,C,Ct,Cs,Carg=lpeg.P,lpeg.S,lpeg.R,lpeg.Cmt,lpeg.C,lpeg.Ct,lpeg.Cs,lpeg.Carg
+local lpegmatch,patterns=lpeg.match,lpeg.patterns
+local trace_features=false trackers.register("afm.features",function(v) trace_features=v end)
+local trace_indexing=false trackers.register("afm.indexing",function(v) trace_indexing=v end)
+local trace_loading=false trackers.register("afm.loading",function(v) trace_loading=v end)
+local trace_defining=false trackers.register("fonts.defining",function(v) trace_defining=v end)
+local report_afm=logs.reporter("fonts","afm loading")
+local setmetatableindex=table.setmetatableindex
+local derivetable=table.derive
+local findbinfile=resolvers.findbinfile
+local definers=fonts.definers
+local readers=fonts.readers
+local constructors=fonts.constructors
+local afm=constructors.handlers.afm
+local pfb=constructors.handlers.pfb
+local otf=fonts.handlers.otf
+local otfreaders=otf.readers
+local otfenhancers=otf.enhancers
+local afmfeatures=constructors.features.afm
+local registerafmfeature=afmfeatures.register
+local afmenhancers=constructors.enhancers.afm
+local registerafmenhancer=afmenhancers.register
+afm.version=1.512 
+afm.cache=containers.define("fonts","one",afm.version,true)
+afm.autoprefixed=true 
+afm.helpdata={} 
+afm.syncspace=true 
+local overloads=fonts.mappings.overloads
+local applyruntimefixes=fonts.treatments and fonts.treatments.applyfixes
+function afm.load(filename)
+  filename=resolvers.findfile(filename,'afm') or ""
+  if filename~="" and not fonts.names.ignoredfile(filename) then
+    local name=file.removesuffix(file.basename(filename))
+    local data=containers.read(afm.cache,name)
+    local attr=lfs.attributes(filename)
+    local size,time=attr.size or 0,attr.modification or 0
+    local pfbfile=file.replacesuffix(name,"pfb")
+    local pfbname=resolvers.findfile(pfbfile,"pfb") or ""
+    if pfbname=="" then
+      pfbname=resolvers.findfile(file.basename(pfbfile),"pfb") or ""
+    end
+    local pfbsize,pfbtime=0,0
+    if pfbname~="" then
+      local attr=lfs.attributes(pfbname)
+      pfbsize=attr.size or 0
+      pfbtime=attr.modification or 0
+    end
+    if not data or data.size~=size or data.time~=time or data.pfbsize~=pfbsize or data.pfbtime~=pfbtime then
+      report_afm("reading %a",filename)
+      data=afm.readers.loadfont(filename,pfbname)
+      if data then
+        afmenhancers.apply(data,filename)
+        fonts.mappings.addtounicode(data,filename)
+        otfreaders.pack(data)
+        data.size=size
+        data.time=time
+        data.pfbsize=pfbsize
+        data.pfbtime=pfbtime
+        report_afm("saving %a in cache",name)
+        data=containers.write(afm.cache,name,data)
+        data=containers.read(afm.cache,name)
+      end
+    end
+    if data then
+      otfreaders.unpack(data)
+      otfreaders.expand(data) 
+      otfreaders.addunicodetable(data) 
+      otfenhancers.apply(data,filename,data)
+      if applyruntimefixes then
+        applyruntimefixes(filename,data)
+      end
+    end
+    return data
+  end
+end
+local uparser=fonts.mappings.makenameparser() 
+local function enhance_unify_names(data,filename)
+  local unicodevector=fonts.encodings.agl.unicodes 
+  local unicodes={}
+  local names={}
+  local private=constructors.privateoffset
+  local descriptions=data.descriptions
+  for name,blob in next,data.characters do
+    local code=unicodevector[name] 
+    if not code then
+      code=lpegmatch(uparser,name)
+      if type(code)~="number" then
+        code=private
+        private=private+1
+        report_afm("assigning private slot %U for unknown glyph name %a",code,name)
+      end
+    end
+    local index=blob.index
+    unicodes[name]=code
+    names[name]=index
+    blob.name=name
+    descriptions[code]={
+      boundingbox=blob.boundingbox,
+      width=blob.width,
+      kerns=blob.kerns,
+      index=index,
+      name=name,
+    }
+  end
+  for unicode,description in next,descriptions do
+    local kerns=description.kerns
+    if kerns then
+      local krn={}
+      for name,kern in next,kerns do
+        local unicode=unicodes[name]
+        if unicode then
+          krn[unicode]=kern
+        else
+        end
+      end
+      description.kerns=krn
+    end
+  end
+  data.characters=nil
+  local resources=data.resources
+  local filename=resources.filename or file.removesuffix(file.basename(filename))
+  resources.filename=resolvers.unresolve(filename) 
+  resources.unicodes=unicodes 
+  resources.marks={}
+  resources.private=private
+end
+local everywhere={ ["*"]={ ["*"]=true } } 
+local noflags={ false,false,false,false }
+local function enhance_normalize_features(data)
+  local ligatures=setmetatableindex("table")
+  local kerns=setmetatableindex("table")
+  local extrakerns=setmetatableindex("table")
+  for u,c in next,data.descriptions do
+    local l=c.ligatures
+    local k=c.kerns
+    local e=c.extrakerns
+    if l then
+      ligatures[u]=l
+      for u,v in next,l do
+        l[u]={ ligature=v }
+      end
+      c.ligatures=nil
+    end
+    if k then
+      kerns[u]=k
+      for u,v in next,k do
+        k[u]=v 
+      end
+      c.kerns=nil
+    end
+    if e then
+      extrakerns[u]=e
+      for u,v in next,e do
+        e[u]=v 
+      end
+      c.extrakerns=nil
+    end
+  end
+  local features={
+    gpos={},
+    gsub={},
+  }
+  local sequences={
+  }
+  if next(ligatures) then
+    features.gsub.liga=everywhere
+    data.properties.hasligatures=true
+    sequences[#sequences+1]={
+      features={
+        liga=everywhere,
+      },
+      flags=noflags,
+      name="s_s_0",
+      nofsteps=1,
+      order={ "liga" },
+      type="gsub_ligature",
+      steps={
+        {
+          coverage=ligatures,
+        },
+      },
+    }
+  end
+  if next(kerns) then
+    features.gpos.kern=everywhere
+    data.properties.haskerns=true
+    sequences[#sequences+1]={
+      features={
+        kern=everywhere,
+      },
+      flags=noflags,
+      name="p_s_0",
+      nofsteps=1,
+      order={ "kern" },
+      type="gpos_pair",
+      steps={
+        {
+          format="kern",
+          coverage=kerns,
+        },
+      },
+    }
+  end
+  if next(extrakerns) then
+    features.gpos.extrakerns=everywhere
+    data.properties.haskerns=true
+    sequences[#sequences+1]={
+      features={
+        extrakerns=everywhere,
+      },
+      flags=noflags,
+      name="p_s_1",
+      nofsteps=1,
+      order={ "extrakerns" },
+      type="gpos_pair",
+      steps={
+        {
+          format="kern",
+          coverage=extrakerns,
+        },
+      },
+    }
+  end
+  data.resources.features=features
+  data.resources.sequences=sequences
+end
+local function enhance_fix_names(data)
+  for k,v in next,data.descriptions do
+    local n=v.name
+    local r=overloads[n]
+    if r then
+      local name=r.name
+      if trace_indexing then
+        report_afm("renaming characters %a to %a",n,name)
+      end
+      v.name=name
+      v.unicode=r.unicode
+    end
+  end
+end
+local addthem=function(rawdata,ligatures)
+  if ligatures then
+    local descriptions=rawdata.descriptions
+    local resources=rawdata.resources
+    local unicodes=resources.unicodes
+    for ligname,ligdata in next,ligatures do
+      local one=descriptions[unicodes[ligname]]
+      if one then
+        for _,pair in next,ligdata do
+          local two,three=unicodes[pair[1]],unicodes[pair[2]]
+          if two and three then
+            local ol=one.ligatures
+            if ol then
+              if not ol[two] then
+                ol[two]=three
+              end
+            else
+              one.ligatures={ [two]=three }
+            end
+          end
+        end
+      end
+    end
+  end
+end
+local function enhance_add_ligatures(rawdata)
+  addthem(rawdata,afm.helpdata.ligatures)
+end
+local function enhance_add_extra_kerns(rawdata) 
+  local descriptions=rawdata.descriptions
+  local resources=rawdata.resources
+  local unicodes=resources.unicodes
+  local function do_it_left(what)
+    if what then
+      for unicode,description in next,descriptions do
+        local kerns=description.kerns
+        if kerns then
+          local extrakerns
+          for complex,simple in next,what do
+            complex=unicodes[complex]
+            simple=unicodes[simple]
+            if complex and simple then
+              local ks=kerns[simple]
+              if ks and not kerns[complex] then
+                if extrakerns then
+                  extrakerns[complex]=ks
+                else
+                  extrakerns={ [complex]=ks }
+                end
+              end
+            end
+          end
+          if extrakerns then
+            description.extrakerns=extrakerns
+          end
+        end
+      end
+    end
+  end
+  local function do_it_copy(what)
+    if what then
+      for complex,simple in next,what do
+        complex=unicodes[complex]
+        simple=unicodes[simple]
+        if complex and simple then
+          local complexdescription=descriptions[complex]
+          if complexdescription then 
+            local simpledescription=descriptions[complex]
+            if simpledescription then
+              local extrakerns
+              local kerns=simpledescription.kerns
+              if kerns then
+                for unicode,kern in next,kerns do
+                  if extrakerns then
+                    extrakerns[unicode]=kern
+                  else
+                    extrakerns={ [unicode]=kern }
+                  end
+                end
+              end
+              local extrakerns=simpledescription.extrakerns
+              if extrakerns then
+                for unicode,kern in next,extrakerns do
+                  if extrakerns then
+                    extrakerns[unicode]=kern
+                  else
+                    extrakerns={ [unicode]=kern }
+                  end
+                end
+              end
+              if extrakerns then
+                complexdescription.extrakerns=extrakerns
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+  do_it_left(afm.helpdata.leftkerned)
+  do_it_left(afm.helpdata.bothkerned)
+  do_it_copy(afm.helpdata.bothkerned)
+  do_it_copy(afm.helpdata.rightkerned)
+end
+local function adddimensions(data) 
+  if data then
+    for unicode,description in next,data.descriptions do
+      local bb=description.boundingbox
+      if bb then
+        local ht,dp=bb[4],-bb[2]
+        if ht==0 or ht<0 then
+        else
+          description.height=ht
+        end
+        if dp==0 or dp<0 then
+        else
+          description.depth=dp
+        end
+      end
+    end
+  end
+end
+local function copytotfm(data)
+  if data and data.descriptions then
+    local metadata=data.metadata
+    local resources=data.resources
+    local properties=derivetable(data.properties)
+    local descriptions=derivetable(data.descriptions)
+    local goodies=derivetable(data.goodies)
+    local characters={}
+    local parameters={}
+    local unicodes=resources.unicodes
+    for unicode,description in next,data.descriptions do 
+      characters[unicode]={}
+    end
+    local filename=constructors.checkedfilename(resources)
+    local fontname=metadata.fontname or metadata.fullname
+    local fullname=metadata.fullname or metadata.fontname
+    local endash=0x0020 
+    local emdash=0x2014
+    local spacer="space"
+    local spaceunits=500
+    local monospaced=metadata.monospaced
+    local charwidth=metadata.charwidth
+    local italicangle=metadata.italicangle
+    local charxheight=metadata.xheight and metadata.xheight>0 and metadata.xheight
+    properties.monospaced=monospaced
+    parameters.italicangle=italicangle
+    parameters.charwidth=charwidth
+    parameters.charxheight=charxheight
+    if properties.monospaced then
+      if descriptions[endash] then
+        spaceunits,spacer=descriptions[endash].width,"space"
+      end
+      if not spaceunits and descriptions[emdash] then
+        spaceunits,spacer=descriptions[emdash].width,"emdash"
+      end
+      if not spaceunits and charwidth then
+        spaceunits,spacer=charwidth,"charwidth"
+      end
+    else
+      if descriptions[endash] then
+        spaceunits,spacer=descriptions[endash].width,"space"
+      end
+      if not spaceunits and charwidth then
+        spaceunits,spacer=charwidth,"charwidth"
+      end
+    end
+    spaceunits=tonumber(spaceunits)
+    if spaceunits<200 then
+    end
+    parameters.slant=0
+    parameters.space=spaceunits
+    parameters.space_stretch=500
+    parameters.space_shrink=333
+    parameters.x_height=400
+    parameters.quad=1000
+    if italicangle and italicangle~=0 then
+      parameters.italicangle=italicangle
+      parameters.italicfactor=math.cos(math.rad(90+italicangle))
+      parameters.slant=- math.tan(italicangle*math.pi/180)
+    end
+    if monospaced then
+      parameters.space_stretch=0
+      parameters.space_shrink=0
+    elseif afm.syncspace then
+      parameters.space_stretch=spaceunits/2
+      parameters.space_shrink=spaceunits/3
+    end
+    parameters.extra_space=parameters.space_shrink
+    if charxheight then
+      parameters.x_height=charxheight
+    else
+      local x=0x0078 
+      if x then
+        local x=descriptions[x]
+        if x then
+          parameters.x_height=x.height
+        end
+      end
+    end
+    if metadata.sup then
+      local dummy={ 0,0,0 }
+      parameters[ 1]=metadata.designsize    or 0
+      parameters[ 2]=metadata.checksum     or 0
+      parameters[ 3],
+      parameters[ 4],
+      parameters[ 5]=unpack(metadata.space   or dummy)
+      parameters[ 6]=metadata.quad    or 0
+      parameters[ 7]=metadata.extraspace or 0
+      parameters[ 8],
+      parameters[ 9],
+      parameters[10]=unpack(metadata.num    or dummy)
+      parameters[11],
+      parameters[12]=unpack(metadata.denom   or dummy)
+      parameters[13],
+      parameters[14],
+      parameters[15]=unpack(metadata.sup    or dummy)
+      parameters[16],
+      parameters[17]=unpack(metadata.sub    or dummy)
+      parameters[18]=metadata.supdrop  or 0
+      parameters[19]=metadata.subdrop  or 0
+      parameters[20],
+      parameters[21]=unpack(metadata.delim   or dummy)
+      parameters[22]=metadata.axisheight or 0
+    end
+    parameters.designsize=(metadata.designsize or 10)*65536
+    parameters.ascender=abs(metadata.ascender or 0)
+    parameters.descender=abs(metadata.descender or 0)
+    parameters.units=1000
+    properties.spacer=spacer
+    properties.encodingbytes=2
+    properties.format=fonts.formats[filename] or "type1"
+    properties.filename=filename
+    properties.fontname=fontname
+    properties.fullname=fullname
+    properties.psname=fullname
+    properties.name=filename or fullname or fontname
+    if next(characters) then
+      return {
+        characters=characters,
+        descriptions=descriptions,
+        parameters=parameters,
+        resources=resources,
+        properties=properties,
+        goodies=goodies,
+      }
+    end
+  end
+  return nil
+end
+function afm.setfeatures(tfmdata,features)
+  local okay=constructors.initializefeatures("afm",tfmdata,features,trace_features,report_afm)
+  if okay then
+    return constructors.collectprocessors("afm",tfmdata,features,trace_features,report_afm)
+  else
+    return {} 
+  end
+end
+local function addtables(data)
+  local resources=data.resources
+  local lookuptags=resources.lookuptags
+  local unicodes=resources.unicodes
+  if not lookuptags then
+    lookuptags={}
+    resources.lookuptags=lookuptags
+  end
+  setmetatableindex(lookuptags,function(t,k)
+    local v=type(k)=="number" and ("lookup "..k) or k
+    t[k]=v
+    return v
+  end)
+  if not unicodes then
+    unicodes={}
+    resources.unicodes=unicodes
+    setmetatableindex(unicodes,function(t,k)
+      setmetatableindex(unicodes,nil)
+      for u,d in next,data.descriptions do
+        local n=d.name
+        if n then
+          t[n]=u
+        end
+      end
+      return rawget(t,k)
+    end)
+  end
+  constructors.addcoreunicodes(unicodes) 
+end
+local function afmtotfm(specification)
+  local afmname=specification.filename or specification.name
+  if specification.forced=="afm" or specification.format=="afm" then 
+    if trace_loading then
+      report_afm("forcing afm format for %a",afmname)
+    end
+  else
+    local tfmname=findbinfile(afmname,"ofm") or ""
+    if tfmname~="" then
+      if trace_loading then
+        report_afm("fallback from afm to tfm for %a",afmname)
+      end
+      return 
+    end
+  end
+  if afmname~="" then
+    local features=constructors.checkedfeatures("afm",specification.features.normal)
+    specification.features.normal=features
+    constructors.hashinstance(specification,true)
+    specification=definers.resolve(specification) 
+    local cache_id=specification.hash
+    local tfmdata=containers.read(constructors.cache,cache_id) 
+    if not tfmdata then
+      local rawdata=afm.load(afmname)
+      if rawdata and next(rawdata) then
+        addtables(rawdata)
+        adddimensions(rawdata)
+        tfmdata=copytotfm(rawdata)
+        if tfmdata and next(tfmdata) then
+          local shared=tfmdata.shared
+          if not shared then
+            shared={}
+            tfmdata.shared=shared
+          end
+          shared.rawdata=rawdata
+          shared.dynamics={}
+          tfmdata.changed={}
+          shared.features=features
+          shared.processes=afm.setfeatures(tfmdata,features)
+        end
+      elseif trace_loading then
+        report_afm("no (valid) afm file found with name %a",afmname)
+      end
+      tfmdata=containers.write(constructors.cache,cache_id,tfmdata)
+    end
+    return tfmdata
+  end
+end
+local function read_from_afm(specification)
+  local tfmdata=afmtotfm(specification)
+  if tfmdata then
+    tfmdata.properties.name=specification.name
+    tfmdata=constructors.scale(tfmdata,specification)
+    local allfeatures=tfmdata.shared.features or specification.features.normal
+    constructors.applymanipulators("afm",tfmdata,allfeatures,trace_features,report_afm)
+    fonts.loggers.register(tfmdata,'afm',specification)
+  end
+  return tfmdata
+end
+registerafmfeature {
+  name="mode",
+  description="mode",
+  initializers={
+    base=otf.modeinitializer,
+    node=otf.modeinitializer,
+  }
+}
+registerafmfeature {
+  name="features",
+  description="features",
+  default=true,
+  initializers={
+    node=otf.nodemodeinitializer,
+    base=otf.basemodeinitializer,
+  },
+  processors={
+    node=otf.featuresprocessor,
+  }
+}
+fonts.formats.afm="type1"
+fonts.formats.pfb="type1"
+local function check_afm(specification,fullname)
+  local foundname=findbinfile(fullname,'afm') or "" 
+  if foundname=="" then
+    foundname=fonts.names.getfilename(fullname,"afm") or ""
+  end
+  if foundname=="" and afm.autoprefixed then
+    local encoding,shortname=match(fullname,"^(.-)%-(.*)$") 
+    if encoding and shortname and fonts.encodings.known[encoding] then
+      shortname=findbinfile(shortname,'afm') or "" 
+      if shortname~="" then
+        foundname=shortname
+        if trace_defining then
+          report_afm("stripping encoding prefix from filename %a",afmname)
+        end
+      end
+    end
+  end
+  if foundname~="" then
+    specification.filename=foundname
+    specification.format="afm"
+    return read_from_afm(specification)
+  end
+end
+function readers.afm(specification,method)
+  local fullname=specification.filename or ""
+  local tfmdata=nil
+  if fullname=="" then
+    local forced=specification.forced or ""
+    if forced~="" then
+      tfmdata=check_afm(specification,specification.name.."."..forced)
+    end
+    if not tfmdata then
+      local check_tfm=readers.check_tfm
+      method=(check_tfm and (method or definers.method or "afm or tfm")) or "afm"
+      if method=="tfm" then
+        tfmdata=check_tfm(specification,specification.name)
+      elseif method=="afm" then
+        tfmdata=check_afm(specification,specification.name)
+      elseif method=="tfm or afm" then
+        tfmdata=check_tfm(specification,specification.name) or check_afm(specification,specification.name)
+      else 
+        tfmdata=check_afm(specification,specification.name) or check_tfm(specification,specification.name)
+      end
+    end
+  else
+    tfmdata=check_afm(specification,fullname)
+  end
+  return tfmdata
+end
+function readers.pfb(specification,method) 
+  local original=specification.specification
+  if trace_defining then
+    report_afm("using afm reader for %a",original)
+  end
+  specification.forced="afm"
+  local function swap(name)
+    local value=specification[swap]
+    if value then
+      specification[swap]=gsub("%.pfb",".afm",1)
+    end
+  end
+  swap("filename")
+  swap("fullname")
+  swap("forcedname")
+  swap("specification")
+  return readers.afm(specification,method)
+end
+registerafmenhancer("unify names",enhance_unify_names)
+registerafmenhancer("add ligatures",enhance_add_ligatures)
+registerafmenhancer("add extra kerns",enhance_add_extra_kerns)
+registerafmenhancer("normalize features",enhance_normalize_features)
+registerafmenhancer("check extra features",otfenhancers.enhance)
+registerafmenhancer("fix names",enhance_fix_names)
+
+end --- [luaotfload, fontloader-2017-02-11.lua scope for “font-one”] ---
+
+
+do  --- [luaotfload, fontloader-2017-02-11.lua scope for “font-afk” b36a76ceb835f41f8c05b471000ddc14] ---
+
+if not modules then modules={} end modules ['font-afk']={
+  version=1.001,
+  comment="companion to font-afm.lua",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files",
+  dataonly=true,
+}
+local allocate=utilities.storage.allocate
+fonts.handlers.afm.helpdata={
+  ligatures=allocate { 
+    ['f']={ 
+      { 'f','ff' },
+      { 'i','fi' },
+      { 'l','fl' },
+    },
+    ['ff']={
+      { 'i','ffi' }
+    },
+    ['fi']={
+      { 'i','fii' }
+    },
+    ['fl']={
+      { 'i','fli' }
+    },
+    ['s']={
+      { 't','st' }
+    },
+    ['i']={
+      { 'j','ij' }
+    },
+  },
+  texligatures=allocate {
+    ['quoteleft']={
+      { 'quoteleft','quotedblleft' }
+    },
+    ['quoteright']={
+      { 'quoteright','quotedblright' }
+    },
+    ['hyphen']={
+      { 'hyphen','endash' }
+    },
+    ['endash']={
+      { 'hyphen','emdash' }
+    }
+  },
+  leftkerned=allocate {
+    AEligature="A",aeligature="a",
+    OEligature="O",oeligature="o",
+    IJligature="I",ijligature="i",
+    AE="A",ae="a",
+    OE="O",oe="o",
+    IJ="I",ij="i",
+    Ssharp="S",ssharp="s",
+  },
+  rightkerned=allocate {
+    AEligature="E",aeligature="e",
+    OEligature="E",oeligature="e",
+    IJligature="J",ijligature="j",
+    AE="E",ae="e",
+    OE="E",oe="e",
+    IJ="J",ij="j",
+    Ssharp="S",ssharp="s",
+  },
+  bothkerned=allocate {
+    Acircumflex="A",acircumflex="a",
+    Ccircumflex="C",ccircumflex="c",
+    Ecircumflex="E",ecircumflex="e",
+    Gcircumflex="G",gcircumflex="g",
+    Hcircumflex="H",hcircumflex="h",
+    Icircumflex="I",icircumflex="i",
+    Jcircumflex="J",jcircumflex="j",
+    Ocircumflex="O",ocircumflex="o",
+    Scircumflex="S",scircumflex="s",
+    Ucircumflex="U",ucircumflex="u",
+    Wcircumflex="W",wcircumflex="w",
+    Ycircumflex="Y",ycircumflex="y",
+    Agrave="A",agrave="a",
+    Egrave="E",egrave="e",
+    Igrave="I",igrave="i",
+    Ograve="O",ograve="o",
+    Ugrave="U",ugrave="u",
+    Ygrave="Y",ygrave="y",
+    Atilde="A",atilde="a",
+    Itilde="I",itilde="i",
+    Otilde="O",otilde="o",
+    Utilde="U",utilde="u",
+    Ntilde="N",ntilde="n",
+    Adiaeresis="A",adiaeresis="a",Adieresis="A",adieresis="a",
+    Ediaeresis="E",ediaeresis="e",Edieresis="E",edieresis="e",
+    Idiaeresis="I",idiaeresis="i",Idieresis="I",idieresis="i",
+    Odiaeresis="O",odiaeresis="o",Odieresis="O",odieresis="o",
+    Udiaeresis="U",udiaeresis="u",Udieresis="U",udieresis="u",
+    Ydiaeresis="Y",ydiaeresis="y",Ydieresis="Y",ydieresis="y",
+    Aacute="A",aacute="a",
+    Cacute="C",cacute="c",
+    Eacute="E",eacute="e",
+    Iacute="I",iacute="i",
+    Lacute="L",lacute="l",
+    Nacute="N",nacute="n",
+    Oacute="O",oacute="o",
+    Racute="R",racute="r",
+    Sacute="S",sacute="s",
+    Uacute="U",uacute="u",
+    Yacute="Y",yacute="y",
+    Zacute="Z",zacute="z",
+    Dstroke="D",dstroke="d",
+    Hstroke="H",hstroke="h",
+    Tstroke="T",tstroke="t",
+    Cdotaccent="C",cdotaccent="c",
+    Edotaccent="E",edotaccent="e",
+    Gdotaccent="G",gdotaccent="g",
+    Idotaccent="I",idotaccent="i",
+    Zdotaccent="Z",zdotaccent="z",
+    Amacron="A",amacron="a",
+    Emacron="E",emacron="e",
+    Imacron="I",imacron="i",
+    Omacron="O",omacron="o",
+    Umacron="U",umacron="u",
+    Ccedilla="C",ccedilla="c",
+    Kcedilla="K",kcedilla="k",
+    Lcedilla="L",lcedilla="l",
+    Ncedilla="N",ncedilla="n",
+    Rcedilla="R",rcedilla="r",
+    Scedilla="S",scedilla="s",
+    Tcedilla="T",tcedilla="t",
+    Ohungarumlaut="O",ohungarumlaut="o",
+    Uhungarumlaut="U",uhungarumlaut="u",
+    Aogonek="A",aogonek="a",
+    Eogonek="E",eogonek="e",
+    Iogonek="I",iogonek="i",
+    Uogonek="U",uogonek="u",
+    Aring="A",aring="a",
+    Uring="U",uring="u",
+    Abreve="A",abreve="a",
+    Ebreve="E",ebreve="e",
+    Gbreve="G",gbreve="g",
+    Ibreve="I",ibreve="i",
+    Obreve="O",obreve="o",
+    Ubreve="U",ubreve="u",
+    Ccaron="C",ccaron="c",
+    Dcaron="D",dcaron="d",
+    Ecaron="E",ecaron="e",
+    Lcaron="L",lcaron="l",
+    Ncaron="N",ncaron="n",
+    Rcaron="R",rcaron="r",
+    Scaron="S",scaron="s",
+    Tcaron="T",tcaron="t",
+    Zcaron="Z",zcaron="z",
+    dotlessI="I",dotlessi="i",
+    dotlessJ="J",dotlessj="j",
+    AEligature="AE",aeligature="ae",AE="AE",ae="ae",
+    OEligature="OE",oeligature="oe",OE="OE",oe="oe",
+    IJligature="IJ",ijligature="ij",IJ="IJ",ij="ij",
+    Lstroke="L",lstroke="l",Lslash="L",lslash="l",
+    Ostroke="O",ostroke="o",Oslash="O",oslash="o",
+    Ssharp="SS",ssharp="ss",
+    Aumlaut="A",aumlaut="a",
+    Eumlaut="E",eumlaut="e",
+    Iumlaut="I",iumlaut="i",
+    Oumlaut="O",oumlaut="o",
+    Uumlaut="U",uumlaut="u",
+  }
+}
+
+end --- [luaotfload, fontloader-2017-02-11.lua scope for “font-afk”] ---
+
+
+do  --- [luaotfload, fontloader-2017-02-11.lua scope for “font-tfm” 3d813578dbf6c447e4b859c2bf0618f7] ---
+
+if not modules then modules={} end modules ['font-tfm']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local next,type=next,type
+local match,format=string.match,string.format
+local concat,sortedhash=table.concat,table.sortedhash
+local trace_defining=false trackers.register("fonts.defining",function(v) trace_defining=v end)
+local trace_features=false trackers.register("tfm.features",function(v) trace_features=v end)
+local report_defining=logs.reporter("fonts","defining")
+local report_tfm=logs.reporter("fonts","tfm loading")
+local findbinfile=resolvers.findbinfile
+local setmetatableindex=table.setmetatableindex
+local fonts=fonts
+local handlers=fonts.handlers
+local readers=fonts.readers
+local constructors=fonts.constructors
+local encodings=fonts.encodings
+local tfm=constructors.handlers.tfm
+tfm.version=1.000
+tfm.maxnestingdepth=5
+tfm.maxnestingsize=65536*1024
+local otf=fonts.handlers.otf
+local otfenhancers=otf.enhancers
+local tfmfeatures=constructors.features.tfm
+local registertfmfeature=tfmfeatures.register
+local tfmenhancers=constructors.enhancers.tfm
+local registertfmenhancer=tfmenhancers.register
+constructors.resolvevirtualtoo=false 
+fonts.formats.tfm="type1" 
+fonts.formats.ofm="type1"
+function tfm.setfeatures(tfmdata,features)
+  local okay=constructors.initializefeatures("tfm",tfmdata,features,trace_features,report_tfm)
+  if okay then
+    return constructors.collectprocessors("tfm",tfmdata,features,trace_features,report_tfm)
+  else
+    return {} 
+  end
+end
+local depth={}
+local function read_from_tfm(specification)
+  local filename=specification.filename
+  local size=specification.size
+  depth[filename]=(depth[filename] or 0)+1
+  if trace_defining then
+    report_defining("loading tfm file %a at size %s",filename,size)
+  end
+  local tfmdata=font.read_tfm(filename,size) 
+  if tfmdata then
+    local features=specification.features and specification.features.normal or {}
+    local features=constructors.checkedfeatures("tfm",features)
+    specification.features.normal=features
+    local newtfmdata=(depth[filename]==1) and tfm.reencode(tfmdata,specification)
+    if newtfmdata then
+       tfmdata=newtfmdata
+    end
+    local resources=tfmdata.resources or {}
+    local properties=tfmdata.properties or {}
+    local parameters=tfmdata.parameters or {}
+    local shared=tfmdata.shared   or {}
+    shared.features=features
+    shared.resources=resources
+    properties.name=tfmdata.name      
+    properties.fontname=tfmdata.fontname    
+    properties.psname=tfmdata.psname     
+    properties.fullname=tfmdata.fullname    
+    properties.filename=specification.filename 
+    properties.format=fonts.formats.tfm
+    tfmdata.properties=properties
+    tfmdata.resources=resources
+    tfmdata.parameters=parameters
+    tfmdata.shared=shared
+    shared.rawdata={ resources=resources }
+    shared.features=features
+    if newtfmdata then
+      if not resources.marks then
+        resources.marks={}
+      end
+      if not resources.sequences then
+        resources.sequences={}
+      end
+      if not resources.features then
+        resources.features={
+          gsub={},
+          gpos={},
+        }
+      end
+      if not tfmdata.changed then
+        tfmdata.changed={}
+      end
+      if not tfmdata.descriptions then
+        tfmdata.descriptions=tfmdata.characters
+      end
+      otf.readers.addunicodetable(tfmdata)
+      tfmenhancers.apply(tfmdata,filename)
+      constructors.applymanipulators("tfm",tfmdata,features,trace_features,report_tfm)
+      otf.readers.unifymissing(tfmdata)
+      fonts.mappings.addtounicode(tfmdata,filename)
+      tfmdata.tounicode=1
+      local tounicode=fonts.mappings.tounicode
+      for unicode,v in next,tfmdata.characters do
+        local u=v.unicode
+        if u then
+          v.tounicode=tounicode(u)
+        end
+      end
+      if tfmdata.usedbitmap then
+        tfm.addtounicode(tfmdata)
+      end
+    end
+    shared.processes=next(features) and tfm.setfeatures(tfmdata,features) or nil
+    parameters.factor=1 
+    parameters.size=size
+    parameters.slant=parameters.slant     or parameters[1] or 0
+    parameters.space=parameters.space     or parameters[2] or 0
+    parameters.space_stretch=parameters.space_stretch or parameters[3] or 0
+    parameters.space_shrink=parameters.space_shrink  or parameters[4] or 0
+    parameters.x_height=parameters.x_height    or parameters[5] or 0
+    parameters.quad=parameters.quad      or parameters[6] or 0
+    parameters.extra_space=parameters.extra_space  or parameters[7] or 0
+    constructors.enhanceparameters(parameters)
+    if newtfmdata then
+    elseif constructors.resolvevirtualtoo then
+      fonts.loggers.register(tfmdata,file.suffix(filename),specification) 
+      local vfname=findbinfile(specification.name,'ovf')
+      if vfname and vfname~="" then
+        local vfdata=font.read_vf(vfname,size) 
+        if vfdata then
+          local chars=tfmdata.characters
+          for k,v in next,vfdata.characters do
+            chars[k].commands=v.commands
+          end
+          properties.virtualized=true
+          tfmdata.fonts=vfdata.fonts
+          tfmdata.type="virtual" 
+          local fontlist=vfdata.fonts
+          local name=file.nameonly(filename)
+          for i=1,#fontlist do
+            local n=fontlist[i].name
+            local s=fontlist[i].size
+            local d=depth[filename]
+            s=constructors.scaled(s,vfdata.designsize)
+            if d>tfm.maxnestingdepth then
+              report_defining("too deeply nested virtual font %a with size %a, max nesting depth %s",n,s,tfm.maxnestingdepth)
+              fontlist[i]={ id=0 }
+            elseif (d>1) and (s>tfm.maxnestingsize) then
+              report_defining("virtual font %a exceeds size %s",n,s)
+              fontlist[i]={ id=0 }
+            else
+              local t,id=fonts.constructors.readanddefine(n,s)
+              fontlist[i]={ id=id }
+            end
+          end
+        end
+      end
+    end
+    properties.haskerns=true
+    properties.hasligatures=true
+    resources.unicodes={}
+    resources.lookuptags={}
+    depth[filename]=depth[filename]-1
+    return tfmdata
+  else
+    depth[filename]=depth[filename]-1
+  end
+end
+local function check_tfm(specification,fullname) 
+  local foundname=findbinfile(fullname,'tfm') or ""
+  if foundname=="" then
+    foundname=findbinfile(fullname,'ofm') or "" 
+  end
+  if foundname=="" then
+    foundname=fonts.names.getfilename(fullname,"tfm") or ""
+  end
+  if foundname~="" then
+    specification.filename=foundname
+    specification.format="ofm"
+    return read_from_tfm(specification)
+  elseif trace_defining then
+    report_defining("loading tfm with name %a fails",specification.name)
+  end
+end
+readers.check_tfm=check_tfm
+function readers.tfm(specification)
+  local fullname=specification.filename or ""
+  if fullname=="" then
+    local forced=specification.forced or ""
+    if forced~="" then
+      fullname=specification.name.."."..forced
+    else
+      fullname=specification.name
+    end
+  end
+  return check_tfm(specification,fullname)
+end
+readers.ofm=readers.tfm
+do
+  local outfiles={}
+  local tfmcache=table.setmetatableindex(function(t,tfmdata)
+    local id=font.define(tfmdata)
+    t[tfmdata]=id
+    return id
+  end)
+  local encdone=table.setmetatableindex("table")
+  function tfm.reencode(tfmdata,specification)
+    local features=specification.features
+    if not features then
+      return
+    end
+    local features=features.normal
+    if not features then
+      return
+    end
+    local tfmfile=file.basename(tfmdata.name)
+    local encfile=features.reencode 
+    local pfbfile=features.pfbfile 
+    local bitmap=features.bitmap  
+    if not encfile then
+      return
+    end
+    local pfbfile=outfiles[tfmfile]
+    if pfbfile==nil then
+      if bitmap then
+        pfbfile=false
+      elseif type(pfbfile)~="string" then
+        pfbfile=tfmfile
+      end
+      if type(pfbfile)=="string" then
+        pfbfile=file.addsuffix(pfbfile,"pfb")
+        report_tfm("using type1 shapes from %a for %a",pfbfile,tfmfile)
+      else
+        report_tfm("using bitmap shapes for %a",tfmfile)
+        pfbfile=false 
+      end
+      outfiles[tfmfile]=pfbfile
+    end
+    local encoding=false
+    local vector=false
+    if type(pfbfile)=="string" then
+      local pfb=fonts.constructors.handlers.pfb
+      if pfb and pfb.loadvector then
+        local v,e=pfb.loadvector(pfbfile)
+        if v then
+          vector=v
+        end
+        if e then
+          encoding=e
+        end
+      end
+    end
+    if type(encfile)=="string" and encfile~="auto" then
+      encoding=fonts.encodings.load(file.addsuffix(encfile,"enc"))
+      if encoding then
+        encoding=encoding.vector
+      end
+    end
+    if not encoding then
+      report_tfm("bad encoding for %a, quitting",tfmfile)
+      return
+    end
+    local unicoding=fonts.encodings.agl and fonts.encodings.agl.unicodes
+    local virtualid=tfmcache[tfmdata]
+    local tfmdata=table.copy(tfmdata) 
+    local characters={}
+    local originals=tfmdata.characters
+    local indices={}
+    local parentfont={ "font",1 }
+    local private=fonts.constructors.privateoffset
+    local reported=encdone[tfmfile][encfile]
+    local backmap=vector and table.swapped(vector)
+    local done={} 
+    for index,name in sortedhash(encoding) do 
+      local unicode=unicoding[name]
+      local original=originals[index]
+      if original then
+        if unicode then
+          original.unicode=unicode
+        else
+          unicode=private
+          private=private+1
+          if not reported then
+            report_tfm("glyph %a in font %a with encoding %a gets unicode %U",name,tfmfile,encfile,unicode)
+          end
+        end
+        characters[unicode]=original
+        indices[index]=unicode
+        original.name=name 
+        if backmap then
+          original.index=backmap[name]
+        else 
+          original.commands={ parentfont,{ "char",index } }
+          original.oindex=index
+        end
+        done[name]=true
+      elseif not done[name] then
+        report_tfm("bad index %a in font %a with name %a",index,tfmfile,name)
+      end
+    end
+    encdone[tfmfile][encfile]=true
+    for k,v in next,characters do
+      local kerns=v.kerns
+      if kerns then
+        local t={}
+        for k,v in next,kerns do
+          local i=indices[k]
+          if i then
+            t[i]=v
+          end
+        end
+        v.kerns=next(t) and t or nil
+      end
+      local ligatures=v.ligatures
+      if ligatures then
+        local t={}
+        for k,v in next,ligatures do
+          local i=indices[k]
+          if i then
+            t[i]=v
+            v.char=indices[v.char]
+          end
+        end
+        v.ligatures=next(t) and t or nil
+      end
+    end
+    tfmdata.fonts={ { id=virtualid } }
+    tfmdata.characters=characters
+    tfmdata.fullname=tfmdata.fullname or tfmdata.name
+    tfmdata.psname=file.nameonly(pfbfile or tfmdata.name)
+    tfmdata.filename=pfbfile
+    tfmdata.encodingbytes=2
+    tfmdata.format="type1"
+    tfmdata.tounicode=1
+    tfmdata.embedding="subset"
+    tfmdata.usedbitmap=bitmap and virtualid
+    return tfmdata
+  end
+end
+do
+  local template=[[
+/CIDInit /ProcSet findresource begin
+  12 dict begin
+  begincmap
+    /CIDSystemInfo << /Registry (TeX) /Ordering (bitmap-%s) /Supplement 0 >> def
+    /CMapName /TeX-bitmap-%s def
+    /CMapType 2 def
+    1 begincodespacerange
+      <00> <FF>
+    endcodespacerange
+    %s beginbfchar
+%s
+    endbfchar
+  endcmap
+CMapName currentdict /CMap defineresource pop end
+end
+end
+]]
+  local flushstreamobject=lpdf and lpdf.flushstreamobject
+  local setfontattributes=pdf.setfontattributes
+  if not flushstreamobject then
+    flushstreamobject=function(data)
+      return pdf.obj {
+        immediate=true,
+        type="stream",
+        string=data,
+      }
+    end
+  end
+  if not setfontattributes then
+    setfontattributes=function(id,data)
+      print(format("your luatex is too old so no tounicode bitmap font%i",id))
+    end
+  end
+  function tfm.addtounicode(tfmdata)
+    local id=tfmdata.usedbitmap
+    local map={}
+    local char={} 
+    for k,v in next,tfmdata.characters do
+      local index=v.oindex
+      local tounicode=v.tounicode
+      if index and tounicode then
+        map[index]=tounicode
+      end
+    end
+    for k,v in sortedhash(map) do
+      char[#char+1]=format("<%02X> <%s>",k,v)
+    end
+    char=concat(char,"\n")
+    local stream=format(template,id,id,#char,char)
+    local reference=flushstreamobject(stream,nil,true)
+    setfontattributes(id,format("/ToUnicode %i 0 R",reference))
+  end
+end
+do
+  local everywhere={ ["*"]={ ["*"]=true } } 
+  local noflags={ false,false,false,false }
+  local function enhance_normalize_features(data)
+    local ligatures=setmetatableindex("table")
+    local kerns=setmetatableindex("table")
+    local characters=data.characters
+    for u,c in next,characters do
+      local l=c.ligatures
+      local k=c.kerns
+      if l then
+        ligatures[u]=l
+        for u,v in next,l do
+          l[u]={ ligature=v.char }
+        end
+        c.ligatures=nil
+      end
+      if k then
+        kerns[u]=k
+        for u,v in next,k do
+          k[u]=v 
+        end
+        c.kerns=nil
+      end
+    end
+    for u,l in next,ligatures do
+      for k,v in next,l do
+        local vl=v.ligature
+        local dl=ligatures[vl]
+        if dl then
+          for kk,vv in next,dl do
+            v[kk]=vv 
+          end
+        end
+      end
+    end
+    local features={
+      gpos={},
+      gsub={},
+    }
+    local sequences={
+    }
+    if next(ligatures) then
+      features.gsub.liga=everywhere
+      data.properties.hasligatures=true
+      sequences[#sequences+1]={
+        features={
+          liga=everywhere,
+        },
+        flags=noflags,
+        name="s_s_0",
+        nofsteps=1,
+        order={ "liga" },
+        type="gsub_ligature",
+        steps={
+          {
+            coverage=ligatures,
+          },
+        },
+      }
+    end
+    if next(kerns) then
+      features.gpos.kern=everywhere
+      data.properties.haskerns=true
+      sequences[#sequences+1]={
+        features={
+          kern=everywhere,
+        },
+        flags=noflags,
+        name="p_s_0",
+        nofsteps=1,
+        order={ "kern" },
+        type="gpos_pair",
+        steps={
+          {
+            format="kern",
+            coverage=kerns,
+          },
+        },
+      }
+    end
+    data.resources.features=features
+    data.resources.sequences=sequences
+    data.shared.resources=data.shared.resources or resources
+  end
+  registertfmenhancer("normalize features",enhance_normalize_features)
+  registertfmenhancer("check extra features",otfenhancers.enhance)
+end
+registertfmfeature {
+  name="mode",
+  description="mode",
+  initializers={
+    base=otf.modeinitializer,
+    node=otf.modeinitializer,
+  }
+}
+registertfmfeature {
+  name="features",
+  description="features",
+  default=true,
+  initializers={
+    base=otf.basemodeinitializer,
+    node=otf.nodemodeinitializer,
+  },
+  processors={
+    node=otf.featuresprocessor,
+  }
+}
+
+end --- [luaotfload, fontloader-2017-02-11.lua scope for “font-tfm”] ---
+
+
+do  --- [luaotfload, fontloader-2017-02-11.lua scope for “font-lua” 1fbfdf7b689b2bdfd0e3bb9bf74ce136] ---
+
+if not modules then modules={} end modules ['font-lua']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local trace_defining=false trackers.register("fonts.defining",function(v) trace_defining=v end)
+local report_lua=logs.reporter("fonts","lua loading")
+local fonts=fonts
+local readers=fonts.readers
+fonts.formats.lua="lua"
+local function check_lua(specification,fullname)
+  local fullname=resolvers.findfile(fullname) or ""
+  if fullname~="" then
+    local loader=loadfile(fullname)
+    loader=loader and loader()
+    return loader and loader(specification)
+  end
+end
+readers.check_lua=check_lua
+function readers.lua(specification)
+  local original=specification.specification
+  if trace_defining then
+    report_lua("using lua reader for %a",original)
+  end
+  local fullname=specification.filename or ""
+  if fullname=="" then
+    local forced=specification.forced or ""
+    if forced~="" then
+      fullname=specification.name.."."..forced
+    else
+      fullname=specification.name
+    end
+  end
+  return check_lua(specification,fullname)
+end
+
+end --- [luaotfload, fontloader-2017-02-11.lua scope for “font-lua”] ---
+
+
+do  --- [luaotfload, fontloader-2017-02-11.lua scope for “font-def” 49fa2b50d8d2a1bb70b08b72f858ecd0] ---
+
+if not modules then modules={} end modules ['font-def']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local lower,gsub=string.lower,string.gsub
+local tostring,next=tostring,next
+local lpegmatch=lpeg.match
+local suffixonly,removesuffix=file.suffix,file.removesuffix
+local formatters=string.formatters
+local allocate=utilities.storage.allocate
+local trace_defining=false trackers .register("fonts.defining",function(v) trace_defining=v end)
+local directive_embedall=false directives.register("fonts.embedall",function(v) directive_embedall=v end)
+trackers.register("fonts.loading","fonts.defining","otf.loading","afm.loading","tfm.loading")
+trackers.register("fonts.all","fonts.*","otf.*","afm.*","tfm.*")
+local report_defining=logs.reporter("fonts","defining")
+local fonts=fonts
+local fontdata=fonts.hashes.identifiers
+local readers=fonts.readers
+local definers=fonts.definers
+local specifiers=fonts.specifiers
+local constructors=fonts.constructors
+local fontgoodies=fonts.goodies
+readers.sequence=allocate { 'otf','ttf','afm','tfm','lua' } 
+local variants=allocate()
+specifiers.variants=variants
+definers.methods=definers.methods or {}
+local internalized=allocate() 
+local lastdefined=nil 
+local loadedfonts=constructors.loadedfonts
+local designsizes=constructors.designsizes
+local resolvefile=fontgoodies and fontgoodies.filenames and fontgoodies.filenames.resolve or function(s) return s end
+local splitter,splitspecifiers=nil,"" 
+local P,C,S,Cc=lpeg.P,lpeg.C,lpeg.S,lpeg.Cc
+local left=P("(")
+local right=P(")")
+local colon=P(":")
+local space=P(" ")
+definers.defaultlookup="file"
+local prefixpattern=P(false)
+local function addspecifier(symbol)
+  splitspecifiers=splitspecifiers..symbol
+  local method=S(splitspecifiers)
+  local lookup=C(prefixpattern)*colon
+  local sub=left*C(P(1-left-right-method)^1)*right
+  local specification=C(method)*C(P(1)^1)
+  local name=C((1-sub-specification)^1)
+  splitter=P((lookup+Cc(""))*name*(sub+Cc(""))*(specification+Cc("")))
+end
+local function addlookup(str,default)
+  prefixpattern=prefixpattern+P(str)
+end
+definers.addlookup=addlookup
+addlookup("file")
+addlookup("name")
+addlookup("spec")
+local function getspecification(str)
+  return lpegmatch(splitter,str or "") 
+end
+definers.getspecification=getspecification
+function definers.registersplit(symbol,action,verbosename)
+  addspecifier(symbol)
+  variants[symbol]=action
+  if verbosename then
+    variants[verbosename]=action
+  end
+end
+local function makespecification(specification,lookup,name,sub,method,detail,size)
+  size=size or 655360
+  if not lookup or lookup=="" then
+    lookup=definers.defaultlookup
+  end
+  if trace_defining then
+    report_defining("specification %a, lookup %a, name %a, sub %a, method %a, detail %a",
+      specification,lookup,name,sub,method,detail)
+  end
+  local t={
+    lookup=lookup,
+    specification=specification,
+    size=size,
+    name=name,
+    sub=sub,
+    method=method,
+    detail=detail,
+    resolved="",
+    forced="",
+    features={},
+  }
+  return t
+end
+definers.makespecification=makespecification
+function definers.analyze(specification,size)
+  local lookup,name,sub,method,detail=getspecification(specification or "")
+  return makespecification(specification,lookup,name,sub,method,detail,size)
+end
+definers.resolvers=definers.resolvers or {}
+local resolvers=definers.resolvers
+function resolvers.file(specification)
+  local name=resolvefile(specification.name) 
+  local suffix=lower(suffixonly(name))
+  if fonts.formats[suffix] then
+    specification.forced=suffix
+    specification.forcedname=name
+    specification.name=removesuffix(name)
+  else
+    specification.name=name 
+  end
+end
+function resolvers.name(specification)
+  local resolve=fonts.names.resolve
+  if resolve then
+    local resolved,sub,subindex=resolve(specification.name,specification.sub,specification) 
+    if resolved then
+      specification.resolved=resolved
+      specification.sub=sub
+      specification.subindex=subindex
+      local suffix=lower(suffixonly(resolved))
+      if fonts.formats[suffix] then
+        specification.forced=suffix
+        specification.forcedname=resolved
+        specification.name=removesuffix(resolved)
+      else
+        specification.name=resolved
+      end
+    end
+  else
+    resolvers.file(specification)
+  end
+end
+function resolvers.spec(specification)
+  local resolvespec=fonts.names.resolvespec
+  if resolvespec then
+    local resolved,sub,subindex=resolvespec(specification.name,specification.sub,specification) 
+    if resolved then
+      specification.resolved=resolved
+      specification.sub=sub
+      specification.subindex=subindex
+      specification.forced=lower(suffixonly(resolved))
+      specification.forcedname=resolved
+      specification.name=removesuffix(resolved)
+    end
+  else
+    resolvers.name(specification)
+  end
+end
+function definers.resolve(specification)
+  if not specification.resolved or specification.resolved=="" then 
+    local r=resolvers[specification.lookup]
+    if r then
+      r(specification)
+    end
+  end
+  if specification.forced=="" then
+    specification.forced=nil
+    specification.forcedname=nil
+  end
+  specification.hash=lower(specification.name..' @ '..constructors.hashfeatures(specification))
+  if specification.sub and specification.sub~="" then
+    specification.hash=specification.sub..' @ '..specification.hash
+  end
+  return specification
+end
+function definers.applypostprocessors(tfmdata)
+  local postprocessors=tfmdata.postprocessors
+  if postprocessors then
+    local properties=tfmdata.properties
+    for i=1,#postprocessors do
+      local extrahash=postprocessors[i](tfmdata) 
+      if type(extrahash)=="string" and extrahash~="" then
+        extrahash=gsub(lower(extrahash),"[^a-z]","-")
+        properties.fullname=formatters["%s-%s"](properties.fullname,extrahash)
+      end
+    end
+  end
+  return tfmdata
+end
+local function checkembedding(tfmdata)
+  local properties=tfmdata.properties
+  local embedding
+  if directive_embedall then
+    embedding="full"
+  elseif properties and properties.filename and constructors.dontembed[properties.filename] then
+    embedding="no"
+  else
+    embedding="subset"
+  end
+  if properties then
+    properties.embedding=embedding
+  else
+    tfmdata.properties={ embedding=embedding }
+  end
+  tfmdata.embedding=embedding
+end
+function definers.loadfont(specification)
+  local hash=constructors.hashinstance(specification)
+  local tfmdata=loadedfonts[hash] 
+  if not tfmdata then
+    local forced=specification.forced or ""
+    if forced~="" then
+      local reader=readers[lower(forced)] 
+      tfmdata=reader and reader(specification)
+      if not tfmdata then
+        report_defining("forced type %a of %a not found",forced,specification.name)
+      end
+    else
+      local sequence=readers.sequence 
+      for s=1,#sequence do
+        local reader=sequence[s]
+        if readers[reader] then 
+          if trace_defining then
+            report_defining("trying (reader sequence driven) type %a for %a with file %a",reader,specification.name,specification.filename)
+          end
+          tfmdata=readers[reader](specification)
+          if tfmdata then
+            break
+          else
+            specification.filename=nil
+          end
+        end
+      end
+    end
+    if tfmdata then
+      tfmdata=definers.applypostprocessors(tfmdata)
+      checkembedding(tfmdata) 
+      loadedfonts[hash]=tfmdata
+      designsizes[specification.hash]=tfmdata.parameters.designsize
+    end
+  end
+  if not tfmdata then
+    report_defining("font with asked name %a is not found using lookup %a",specification.name,specification.lookup)
+  end
+  return tfmdata
+end
+function constructors.checkvirtualids()
+end
+function constructors.readanddefine(name,size) 
+  local specification=definers.analyze(name,size)
+  local method=specification.method
+  if method and variants[method] then
+    specification=variants[method](specification)
+  end
+  specification=definers.resolve(specification)
+  local hash=constructors.hashinstance(specification)
+  local id=definers.registered(hash)
+  if not id then
+    local tfmdata=definers.loadfont(specification)
+    if tfmdata then
+      tfmdata.properties.hash=hash
+      constructors.checkvirtualids(tfmdata) 
+      id=font.define(tfmdata)
+      definers.register(tfmdata,id)
+    else
+      id=0 
+    end
+  end
+  return fontdata[id],id
+end
+function definers.current() 
+  return lastdefined
+end
+function definers.registered(hash)
+  local id=internalized[hash]
+  return id,id and fontdata[id]
+end
+function definers.register(tfmdata,id)
+  if tfmdata and id then
+    local hash=tfmdata.properties.hash
+    if not hash then
+      report_defining("registering font, id %a, name %a, invalid hash",id,tfmdata.properties.filename or "?")
+    elseif not internalized[hash] then
+      internalized[hash]=id
+      if trace_defining then
+        report_defining("registering font, id %s, hash %a",id,hash)
+      end
+      fontdata[id]=tfmdata
+    end
+  end
+end
+function definers.read(specification,size,id) 
+  statistics.starttiming(fonts)
+  if type(specification)=="string" then
+    specification=definers.analyze(specification,size)
+  end
+  local method=specification.method
+  if method and variants[method] then
+    specification=variants[method](specification)
+  end
+  specification=definers.resolve(specification)
+  local hash=constructors.hashinstance(specification)
+  local tfmdata=definers.registered(hash) 
+  if tfmdata then
+    if trace_defining then
+      report_defining("already hashed: %s",hash)
+    end
+  else
+    tfmdata=definers.loadfont(specification) 
+    if tfmdata then
+      if trace_defining then
+        report_defining("loaded and hashed: %s",hash)
+      end
+      tfmdata.properties.hash=hash
+      if id then
+        definers.register(tfmdata,id)
+      end
+    else
+      if trace_defining then
+        report_defining("not loaded and hashed: %s",hash)
+      end
+    end
+  end
+  lastdefined=tfmdata or id 
+  if not tfmdata then 
+    report_defining("unknown font %a, loading aborted",specification.name)
+  elseif trace_defining and type(tfmdata)=="table" then
+    local properties=tfmdata.properties or {}
+    local parameters=tfmdata.parameters or {}
+    report_defining("using %a font with id %a, name %a, size %a, bytes %a, encoding %a, fullname %a, filename %a",
+      properties.format or "unknown",id,properties.name,parameters.size,properties.encodingbytes,
+      properties.encodingname,properties.fullname,file.basename(properties.filename))
+  end
+  statistics.stoptiming(fonts)
+  return tfmdata
+end
+function font.getfont(id)
+  return fontdata[id] 
+end
+callbacks.register('define_font',definers.read,"definition of fonts (tfmdata preparation)")
+
+end --- [luaotfload, fontloader-2017-02-11.lua scope for “font-def”] ---
+
+
+do  --- [luaotfload, fontloader-2017-02-11.lua scope for “fonts-ext” aff3846f4c1f15de0a9f4fd7081e0c68] ---
+
+if not modules then modules={} end modules ['luatex-fonts-ext']={
+  version=1.001,
+  comment="companion to luatex-*.tex",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+if context then
+  texio.write_nl("fatal error: this module is not for context")
+  os.exit()
+end
+local fonts=fonts
+local otffeatures=fonts.constructors.features.otf
+local function initializeitlc(tfmdata,value)
+  if value then
+    local parameters=tfmdata.parameters
+    local italicangle=parameters.italicangle
+    if italicangle and italicangle~=0 then
+      local properties=tfmdata.properties
+      local factor=tonumber(value) or 1
+      properties.hasitalics=true
+      properties.autoitalicamount=factor*(parameters.uwidth or 40)/2
+    end
+  end
+end
+otffeatures.register {
+  name="itlc",
+  description="italic correction",
+  initializers={
+    base=initializeitlc,
+    node=initializeitlc,
+  }
+}
+local function initializeslant(tfmdata,value)
+  value=tonumber(value)
+  if not value then
+    value=0
+  elseif value>1 then
+    value=1
+  elseif value<-1 then
+    value=-1
+  end
+  tfmdata.parameters.slantfactor=value
+end
+otffeatures.register {
+  name="slant",
+  description="slant glyphs",
+  initializers={
+    base=initializeslant,
+    node=initializeslant,
+  }
+}
+local function initializeextend(tfmdata,value)
+  value=tonumber(value)
+  if not value then
+    value=0
+  elseif value>10 then
+    value=10
+  elseif value<-10 then
+    value=-10
+  end
+  tfmdata.parameters.extendfactor=value
+end
+otffeatures.register {
+  name="extend",
+  description="scale glyphs horizontally",
+  initializers={
+    base=initializeextend,
+    node=initializeextend,
+  }
+}
+fonts.protrusions=fonts.protrusions    or {}
+fonts.protrusions.setups=fonts.protrusions.setups or {}
+local setups=fonts.protrusions.setups
+local function initializeprotrusion(tfmdata,value)
+  if value then
+    local setup=setups[value]
+    if setup then
+      local factor,left,right=setup.factor or 1,setup.left or 1,setup.right or 1
+      local emwidth=tfmdata.parameters.quad
+      tfmdata.parameters.protrusion={
+        auto=true,
+      }
+      for i,chr in next,tfmdata.characters do
+        local v,pl,pr=setup[i],nil,nil
+        if v then
+          pl,pr=v[1],v[2]
+        end
+        if pl and pl~=0 then chr.left_protruding=left*pl*factor end
+        if pr and pr~=0 then chr.right_protruding=right*pr*factor end
+      end
+    end
+  end
+end
+otffeatures.register {
+  name="protrusion",
+  description="shift characters into the left and or right margin",
+  initializers={
+    base=initializeprotrusion,
+    node=initializeprotrusion,
+  }
+}
+fonts.expansions=fonts.expansions    or {}
+fonts.expansions.setups=fonts.expansions.setups or {}
+local setups=fonts.expansions.setups
+local function initializeexpansion(tfmdata,value)
+  if value then
+    local setup=setups[value]
+    if setup then
+      local factor=setup.factor or 1
+      tfmdata.parameters.expansion={
+        stretch=10*(setup.stretch or 0),
+        shrink=10*(setup.shrink or 0),
+        step=10*(setup.step  or 0),
+        auto=true,
+      }
+      for i,chr in next,tfmdata.characters do
+        local v=setup[i]
+        if v and v~=0 then
+          chr.expansion_factor=v*factor
+        else 
+          chr.expansion_factor=factor
+        end
+      end
+    end
+  end
+end
+otffeatures.register {
+  name="expansion",
+  description="apply hz optimization",
+  initializers={
+    base=initializeexpansion,
+    node=initializeexpansion,
+  }
+}
+function fonts.loggers.onetimemessage() end
+local byte=string.byte
+fonts.expansions.setups['default']={
+  stretch=2,shrink=2,step=.5,factor=1,
+  [byte('A')]=0.5,[byte('B')]=0.7,[byte('C')]=0.7,[byte('D')]=0.5,[byte('E')]=0.7,
+  [byte('F')]=0.7,[byte('G')]=0.5,[byte('H')]=0.7,[byte('K')]=0.7,[byte('M')]=0.7,
+  [byte('N')]=0.7,[byte('O')]=0.5,[byte('P')]=0.7,[byte('Q')]=0.5,[byte('R')]=0.7,
+  [byte('S')]=0.7,[byte('U')]=0.7,[byte('W')]=0.7,[byte('Z')]=0.7,
+  [byte('a')]=0.7,[byte('b')]=0.7,[byte('c')]=0.7,[byte('d')]=0.7,[byte('e')]=0.7,
+  [byte('g')]=0.7,[byte('h')]=0.7,[byte('k')]=0.7,[byte('m')]=0.7,[byte('n')]=0.7,
+  [byte('o')]=0.7,[byte('p')]=0.7,[byte('q')]=0.7,[byte('s')]=0.7,[byte('u')]=0.7,
+  [byte('w')]=0.7,[byte('z')]=0.7,
+  [byte('2')]=0.7,[byte('3')]=0.7,[byte('6')]=0.7,[byte('8')]=0.7,[byte('9')]=0.7,
+}
+fonts.protrusions.setups['default']={
+  factor=1,left=1,right=1,
+  [0x002C]={ 0,1  },
+  [0x002E]={ 0,1  },
+  [0x003A]={ 0,1  },
+  [0x003B]={ 0,1  },
+  [0x002D]={ 0,1  },
+  [0x2013]={ 0,0.50 },
+  [0x2014]={ 0,0.33 },
+  [0x3001]={ 0,1  },
+  [0x3002]={ 0,1  },
+  [0x060C]={ 0,1  },
+  [0x061B]={ 0,1  },
+  [0x06D4]={ 0,1  },
+}
+fonts.handlers.otf.features.normalize=function(t)
+  if t.rand then
+    t.rand="random"
+  end
+  return t
+end
+function fonts.helpers.nametoslot(name)
+  local t=type(name)
+  if t=="string" then
+    local tfmdata=fonts.hashes.identifiers[currentfont()]
+    local shared=tfmdata and tfmdata.shared
+    local fntdata=shared and shared.rawdata
+    return fntdata and fntdata.resources.unicodes[name]
+  elseif t=="number" then
+    return n
+  end
+end
+fonts.encodings=fonts.encodings or {}
+local reencodings={}
+fonts.encodings.reencodings=reencodings
+local function specialreencode(tfmdata,value)
+  local encoding=value and reencodings[value]
+  if encoding then
+    local temp={}
+    local char=tfmdata.characters
+    for k,v in next,encoding do
+      temp[k]=char[v]
+    end
+    for k,v in next,temp do
+      char[k]=temp[k]
+    end
+    return string.format("reencoded:%s",value)
+  end
+end
+local function reencode(tfmdata,value)
+  tfmdata.postprocessors=tfmdata.postprocessors or {}
+  table.insert(tfmdata.postprocessors,
+    function(tfmdata)
+      return specialreencode(tfmdata,value)
+    end
+  )
+end
+otffeatures.register {
+  name="reencode",
+  description="reencode characters",
+  manipulators={
+    base=reencode,
+    node=reencode,
+  }
+}
+local function ignore(tfmdata,key,value)
+  if value then
+    tfmdata.mathparameters=nil
+  end
+end
+otffeatures.register {
+  name="ignoremathconstants",
+  description="ignore math constants table",
+  initializers={
+    base=ignore,
+    node=ignore,
+  }
+}
+
+end --- [luaotfload, fontloader-2017-02-11.lua scope for “fonts-ext”] ---
+
+
+do  --- [luaotfload, fontloader-2017-02-11.lua scope for “font-gbn” 850f31ba73ff8de96371d0aed2b2b4cb] ---
+
+if not modules then modules={} end modules ['font-gbn']={
+  version=1.001,
+  comment="companion to luatex-*.tex",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+if context then
+  texio.write_nl("fatal error: this module is not for context")
+  os.exit()
+end
+local fonts=fonts
+local nodes=nodes
+local nuts=nodes.nuts 
+local traverse_id=nuts.traverse_id
+local flush_node=nuts.flush_node
+local glyph_code=nodes.nodecodes.glyph
+local disc_code=nodes.nodecodes.disc
+local tonode=nuts.tonode
+local tonut=nuts.tonut
+local getfont=nuts.getfont
+local getchar=nuts.getchar
+local getid=nuts.getid
+local getboth=nuts.getboth
+local getprev=nuts.getprev
+local getnext=nuts.getnext
+local getdisc=nuts.getdisc
+local setchar=nuts.setchar
+local setlink=nuts.setlink
+local setprev=nuts.setprev
+local nodetail=nuts.tail
+local n_ligaturing=node.ligaturing
+local n_kerning=node.kerning
+local ligaturing=nuts.ligaturing
+local kerning=nuts.kerning
+local basemodepass=true
+local function l_warning() texio.write_nl("warning: node.ligaturing called directly") l_warning=nil end
+local function k_warning() texio.write_nl("warning: node.kerning called directly")  k_warning=nil end
+function node.ligaturing(...)
+  if basemodepass and l_warning then
+    l_warning()
+  end
+  return n_ligaturing(...)
+end
+function node.kerning(...)
+  if basemodepass and k_warning then
+    k_warning()
+  end
+  return n_kerning(...)
+end
+function nodes.handlers.setbasemodepass(v)
+  basemodepass=v
+end
+function nodes.handlers.nodepass(head)
+  local fontdata=fonts.hashes.identifiers
+  if fontdata then
+    local nuthead=tonut(head)
+    local usedfonts={}
+    local basefonts={}
+    local prevfont=nil
+    local basefont=nil
+    local variants=nil
+    local redundant=nil
+    for n in traverse_id(glyph_code,nuthead) do
+      local font=getfont(n)
+      if font~=prevfont then
+        if basefont then
+          basefont[2]=getprev(n)
+        end
+        prevfont=font
+        local used=usedfonts[font]
+        if not used then
+          local tfmdata=fontdata[font] 
+          if tfmdata then
+            local shared=tfmdata.shared 
+            if shared then
+              local processors=shared.processes
+              if processors and #processors>0 then
+                usedfonts[font]=processors
+              elseif basemodepass then
+                basefont={ n,nil }
+                basefonts[#basefonts+1]=basefont
+              end
+            end
+            local resources=tfmdata.resources
+            variants=resources and resources.variants
+            variants=variants and next(variants) and variants or false
+          end
+        else
+          local tfmdata=fontdata[prevfont]
+          if tfmdata then
+            local resources=tfmdata.resources
+            variants=resources and resources.variants
+            variants=variants and next(variants) and variants or false
+          end
+        end
+      end
+      if variants then
+        local char=getchar(n)
+        if char>=0xFE00 and (char<=0xFE0F or (char>=0xE0100 and char<=0xE01EF)) then
+          local hash=variants[char]
+          if hash then
+            local p=getprev(n)
+            if p and getid(p)==glyph_code then
+              local variant=hash[getchar(p)]
+              if variant then
+                setchar(p,variant)
+              end
+            end
+          end
+          if not redundant then
+            redundant={ n }
+          else
+            redundant[#redundant+1]=n
+          end
+        end
+      end
+    end
+    local nofbasefonts=#basefonts
+    if redundant then
+      for i=1,#redundant do
+        local r=redundant[i]
+        local p,n=getboth(r)
+        if r==nuthead then
+          nuthead=n
+          setprev(n)
+        else
+          setlink(p,n)
+        end
+        if nofbasefonts>0 then
+          for i=1,nofbasefonts do
+            local bi=basefonts[i]
+            if r==bi[1] then
+              bi[1]=n
+            end
+            if r==bi[2] then
+              bi[2]=n
+            end
+          end
+        end
+        flush_node(r)
+      end
+    end
+    for d in traverse_id(disc_code,nuthead) do
+      local _,_,r=getdisc(d)
+      if r then
+        for n in traverse_id(glyph_code,r) do
+          local font=getfont(n)
+          if font~=prevfont then
+            prevfont=font
+            local used=usedfonts[font]
+            if not used then
+              local tfmdata=fontdata[font] 
+              if tfmdata then
+                local shared=tfmdata.shared 
+                if shared then
+                  local processors=shared.processes
+                  if processors and #processors>0 then
+                    usedfonts[font]=processors
+                  end
+                end
+              end
+            end
+          end
+        end
+      end
+    end
+    if next(usedfonts) then
+      for font,processors in next,usedfonts do
+        for i=1,#processors do
+          head=processors[i](head,font,0) or head
+        end
+      end
+    end
+    if basemodepass and nofbasefonts>0 then
+      for i=1,nofbasefonts do
+        local range=basefonts[i]
+        local start=range[1]
+        local stop=range[2]
+        if start then
+          local front=nuthead==start
+          if not stop then
+            stop=nodetail(start)
+          end
+          if stop then
+            start,stop=ligaturing(start,stop)
+            start,stop=kerning(start,stop)
+          elseif start then 
+            start,stop=ligaturing(start,stop)
+            start,stop=kerning(start,stop)
+          end
+          if front and nuthead~=start then
+            head=tonode(start)
+          end
+        end
+      end
+    end
+    return head,true
+  else
+    return head,false
+  end
+end
+function nodes.handlers.basepass(head)
+  if not basemodepass then
+    head=n_ligaturing(head)
+    head=n_kerning(head)
+  end
+  return head,true
+end
+local nodepass=nodes.handlers.nodepass
+local basepass=nodes.handlers.basepass
+local injectpass=nodes.injections.handler
+local protectpass=nodes.handlers.protectglyphs
+function nodes.simple_font_handler(head)
+  if head then
+    head=nodepass(head)
+    head=injectpass(head)
+    if not basemodepass then
+      head=basepass(head)
+    end
+    protectpass(head)
+    return head,true
+  else
+    return head,false
+  end
+end
+
+end --- [luaotfload, fontloader-2017-02-11.lua scope for “font-gbn”] ---
+
+
+--- vim:ft=lua:sw=2:ts=8:et:tw=79
diff --git a/Master/texmf-dist/tex/luatex/fontloader-luaotfload/fontloader-reference-2017-07-28.lua b/Master/texmf-dist/tex/luatex/fontloader-luaotfload/fontloader-reference-2017-07-28.lua
new file mode 100644
index 00000000000..0445af9cfae
--- /dev/null
+++ b/Master/texmf-dist/tex/luatex/fontloader-luaotfload/fontloader-reference-2017-07-28.lua
@@ -0,0 +1,34685 @@
+-- merged file : c:/data/develop/context/sources/luatex-fonts-merged.lua
+-- parent file : c:/data/develop/context/sources/luatex-fonts.lua
+-- merge date  : 07/28/17 22:51:33
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['l-lua']={
+  version=1.001,
+  comment="companion to luat-lib.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+_MAJORVERSION,_MINORVERSION=string.match(_VERSION,"^[^%d]+(%d+)%.(%d+).*$")
+_MAJORVERSION=tonumber(_MAJORVERSION) or 5
+_MINORVERSION=tonumber(_MINORVERSION) or 1
+_LUAVERSION=_MAJORVERSION+_MINORVERSION/10
+if _LUAVERSION<5.2 and jit then
+  _MINORVERSION=2
+  _LUAVERSION=5.2
+end
+if not lpeg then
+  lpeg=require("lpeg")
+end
+if loadstring then
+  local loadnormal=load
+  function load(first,...)
+    if type(first)=="string" then
+      return loadstring(first,...)
+    else
+      return loadnormal(first,...)
+    end
+  end
+else
+  loadstring=load
+end
+if not ipairs then
+  local function iterate(a,i)
+    i=i+1
+    local v=a[i]
+    if v~=nil then
+      return i,v 
+    end
+  end
+  function ipairs(a)
+    return iterate,a,0
+  end
+end
+if not pairs then
+  function pairs(t)
+    return next,t 
+  end
+end
+if not table.unpack then
+  table.unpack=_G.unpack
+elseif not unpack then
+  _G.unpack=table.unpack
+end
+if not package.loaders then 
+  package.loaders=package.searchers
+end
+local print,select,tostring=print,select,tostring
+local inspectors={}
+function setinspector(kind,inspector) 
+  inspectors[kind]=inspector
+end
+function inspect(...) 
+  for s=1,select("#",...) do
+    local value=select(s,...)
+    if value==nil then
+      print("nil")
+    else
+      local done=false
+      local kind=type(value)
+      local inspector=inspectors[kind]
+      if inspector then
+        done=inspector(value)
+        if done then
+          break
+        end
+      end
+      for kind,inspector in next,inspectors do
+        done=inspector(value)
+        if done then
+          break
+        end
+      end
+      if not done then
+        print(tostring(value))
+      end
+    end
+  end
+end
+local dummy=function() end
+function optionalrequire(...)
+  local ok,result=xpcall(require,dummy,...)
+  if ok then
+    return result
+  end
+end
+if lua then
+  lua.mask=load([[τεχ = 1]]) and "utf" or "ascii"
+end
+local flush=io.flush
+if flush then
+  local execute=os.execute if execute then function os.execute(...) flush() return execute(...) end end
+  local exec=os.exec  if exec  then function os.exec  (...) flush() return exec  (...) end end
+  local spawn=os.spawn  if spawn  then function os.spawn (...) flush() return spawn (...) end end
+  local popen=io.popen  if popen  then function io.popen (...) flush() return popen (...) end end
+end
+FFISUPPORTED=type(ffi)=="table" and ffi.os~="" and ffi.arch~="" and ffi.load
+if not FFISUPPORTED then
+  local okay;okay,ffi=pcall(require,"ffi")
+  FFISUPPORTED=type(ffi)=="table" and ffi.os~="" and ffi.arch~="" and ffi.load
+end
+if not FFISUPPORTED then
+  ffi=nil
+elseif not ffi.number then
+  ffi.number=tonumber
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['l-lpeg']={
+  version=1.001,
+  comment="companion to luat-lib.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+lpeg=require("lpeg")
+if not lpeg.print then function lpeg.print(...) print(lpeg.pcode(...)) end end
+local type,next,tostring=type,next,tostring
+local byte,char,gmatch,format=string.byte,string.char,string.gmatch,string.format
+local floor=math.floor
+local P,R,S,V,Ct,C,Cs,Cc,Cp,Cmt=lpeg.P,lpeg.R,lpeg.S,lpeg.V,lpeg.Ct,lpeg.C,lpeg.Cs,lpeg.Cc,lpeg.Cp,lpeg.Cmt
+local lpegtype,lpegmatch,lpegprint=lpeg.type,lpeg.match,lpeg.print
+if setinspector then
+  setinspector("lpeg",function(v) if lpegtype(v) then lpegprint(v) return true end end)
+end
+lpeg.patterns=lpeg.patterns or {} 
+local patterns=lpeg.patterns
+local anything=P(1)
+local endofstring=P(-1)
+local alwaysmatched=P(true)
+patterns.anything=anything
+patterns.endofstring=endofstring
+patterns.beginofstring=alwaysmatched
+patterns.alwaysmatched=alwaysmatched
+local sign=S('+-')
+local zero=P('0')
+local digit=R('09')
+local octdigit=R("07")
+local lowercase=R("az")
+local uppercase=R("AZ")
+local underscore=P("_")
+local hexdigit=digit+lowercase+uppercase
+local cr,lf,crlf=P("\r"),P("\n"),P("\r\n")
+local newline=P("\r")*(P("\n")+P(true))+P("\n") 
+local escaped=P("\\")*anything
+local squote=P("'")
+local dquote=P('"')
+local space=P(" ")
+local period=P(".")
+local comma=P(",")
+local utfbom_32_be=P('\000\000\254\255') 
+local utfbom_32_le=P('\255\254\000\000') 
+local utfbom_16_be=P('\254\255')     
+local utfbom_16_le=P('\255\254')     
+local utfbom_8=P('\239\187\191')   
+local utfbom=utfbom_32_be+utfbom_32_le+utfbom_16_be+utfbom_16_le+utfbom_8
+local utftype=utfbom_32_be*Cc("utf-32-be")+utfbom_32_le*Cc("utf-32-le")+utfbom_16_be*Cc("utf-16-be")+utfbom_16_le*Cc("utf-16-le")+utfbom_8*Cc("utf-8")+alwaysmatched*Cc("utf-8") 
+local utfstricttype=utfbom_32_be*Cc("utf-32-be")+utfbom_32_le*Cc("utf-32-le")+utfbom_16_be*Cc("utf-16-be")+utfbom_16_le*Cc("utf-16-le")+utfbom_8*Cc("utf-8")
+local utfoffset=utfbom_32_be*Cc(4)+utfbom_32_le*Cc(4)+utfbom_16_be*Cc(2)+utfbom_16_le*Cc(2)+utfbom_8*Cc(3)+Cc(0)
+local utf8next=R("\128\191")
+patterns.utfbom_32_be=utfbom_32_be
+patterns.utfbom_32_le=utfbom_32_le
+patterns.utfbom_16_be=utfbom_16_be
+patterns.utfbom_16_le=utfbom_16_le
+patterns.utfbom_8=utfbom_8
+patterns.utf_16_be_nl=P("\000\r\000\n")+P("\000\r")+P("\000\n") 
+patterns.utf_16_le_nl=P("\r\000\n\000")+P("\r\000")+P("\n\000") 
+patterns.utf_32_be_nl=P("\000\000\000\r\000\000\000\n")+P("\000\000\000\r")+P("\000\000\000\n")
+patterns.utf_32_le_nl=P("\r\000\000\000\n\000\000\000")+P("\r\000\000\000")+P("\n\000\000\000")
+patterns.utf8one=R("\000\127")
+patterns.utf8two=R("\194\223")*utf8next
+patterns.utf8three=R("\224\239")*utf8next*utf8next
+patterns.utf8four=R("\240\244")*utf8next*utf8next*utf8next
+patterns.utfbom=utfbom
+patterns.utftype=utftype
+patterns.utfstricttype=utfstricttype
+patterns.utfoffset=utfoffset
+local utf8char=patterns.utf8one+patterns.utf8two+patterns.utf8three+patterns.utf8four
+local validutf8char=utf8char^0*endofstring*Cc(true)+Cc(false)
+local utf8character=P(1)*R("\128\191")^0 
+patterns.utf8=utf8char
+patterns.utf8char=utf8char
+patterns.utf8character=utf8character 
+patterns.validutf8=validutf8char
+patterns.validutf8char=validutf8char
+local eol=S("\n\r")
+local spacer=S(" \t\f\v") 
+local whitespace=eol+spacer
+local nonspacer=1-spacer
+local nonwhitespace=1-whitespace
+patterns.eol=eol
+patterns.spacer=spacer
+patterns.whitespace=whitespace
+patterns.nonspacer=nonspacer
+patterns.nonwhitespace=nonwhitespace
+local stripper=spacer^0*C((spacer^0*nonspacer^1)^0)   
+local fullstripper=whitespace^0*C((whitespace^0*nonwhitespace^1)^0)
+local collapser=Cs(spacer^0/""*nonspacer^0*((spacer^0/" "*nonspacer^1)^0))
+local nospacer=Cs((whitespace^1/""+nonwhitespace^1)^0)
+local b_collapser=Cs(whitespace^0/""*(nonwhitespace^1+whitespace^1/" ")^0)
+local e_collapser=Cs((whitespace^1*P(-1)/""+nonwhitespace^1+whitespace^1/" ")^0)
+local m_collapser=Cs((nonwhitespace^1+whitespace^1/" ")^0)
+local b_stripper=Cs(spacer^0/""*(nonspacer^1+spacer^1/" ")^0)
+local e_stripper=Cs((spacer^1*P(-1)/""+nonspacer^1+spacer^1/" ")^0)
+local m_stripper=Cs((nonspacer^1+spacer^1/" ")^0)
+patterns.stripper=stripper
+patterns.fullstripper=fullstripper
+patterns.collapser=collapser
+patterns.nospacer=nospacer
+patterns.b_collapser=b_collapser
+patterns.m_collapser=m_collapser
+patterns.e_collapser=e_collapser
+patterns.b_stripper=b_stripper
+patterns.m_stripper=m_stripper
+patterns.e_stripper=e_stripper
+patterns.lowercase=lowercase
+patterns.uppercase=uppercase
+patterns.letter=patterns.lowercase+patterns.uppercase
+patterns.space=space
+patterns.tab=P("\t")
+patterns.spaceortab=patterns.space+patterns.tab
+patterns.newline=newline
+patterns.emptyline=newline^1
+patterns.equal=P("=")
+patterns.comma=comma
+patterns.commaspacer=comma*spacer^0
+patterns.period=period
+patterns.colon=P(":")
+patterns.semicolon=P(";")
+patterns.underscore=underscore
+patterns.escaped=escaped
+patterns.squote=squote
+patterns.dquote=dquote
+patterns.nosquote=(escaped+(1-squote))^0
+patterns.nodquote=(escaped+(1-dquote))^0
+patterns.unsingle=(squote/"")*patterns.nosquote*(squote/"") 
+patterns.undouble=(dquote/"")*patterns.nodquote*(dquote/"") 
+patterns.unquoted=patterns.undouble+patterns.unsingle 
+patterns.unspacer=((patterns.spacer^1)/"")^0
+patterns.singlequoted=squote*patterns.nosquote*squote
+patterns.doublequoted=dquote*patterns.nodquote*dquote
+patterns.quoted=patterns.doublequoted+patterns.singlequoted
+patterns.digit=digit
+patterns.octdigit=octdigit
+patterns.hexdigit=hexdigit
+patterns.sign=sign
+patterns.cardinal=digit^1
+patterns.integer=sign^-1*digit^1
+patterns.unsigned=digit^0*period*digit^1
+patterns.float=sign^-1*patterns.unsigned
+patterns.cunsigned=digit^0*comma*digit^1
+patterns.cpunsigned=digit^0*(period+comma)*digit^1
+patterns.cfloat=sign^-1*patterns.cunsigned
+patterns.cpfloat=sign^-1*patterns.cpunsigned
+patterns.number=patterns.float+patterns.integer
+patterns.cnumber=patterns.cfloat+patterns.integer
+patterns.cpnumber=patterns.cpfloat+patterns.integer
+patterns.oct=zero*octdigit^1
+patterns.octal=patterns.oct
+patterns.HEX=zero*P("X")*(digit+uppercase)^1
+patterns.hex=zero*P("x")*(digit+lowercase)^1
+patterns.hexadecimal=zero*S("xX")*hexdigit^1
+patterns.hexafloat=sign^-1*zero*S("xX")*(hexdigit^0*period*hexdigit^1+hexdigit^1*period*hexdigit^0+hexdigit^1)*(S("pP")*sign^-1*hexdigit^1)^-1
+patterns.decafloat=sign^-1*(digit^0*period*digit^1+digit^1*period*digit^0+digit^1)*S("eE")*sign^-1*digit^1
+patterns.propername=(uppercase+lowercase+underscore)*(uppercase+lowercase+underscore+digit)^0*endofstring
+patterns.somecontent=(anything-newline-space)^1 
+patterns.beginline=#(1-newline)
+patterns.longtostring=Cs(whitespace^0/""*((patterns.quoted+nonwhitespace^1+whitespace^1/""*(P(-1)+Cc(" ")))^0))
+local function anywhere(pattern) 
+  return P { P(pattern)+1*V(1) }
+end
+lpeg.anywhere=anywhere
+function lpeg.instringchecker(p)
+  p=anywhere(p)
+  return function(str)
+    return lpegmatch(p,str) and true or false
+  end
+end
+function lpeg.splitter(pattern,action)
+  return (((1-P(pattern))^1)/action+1)^0
+end
+function lpeg.tsplitter(pattern,action)
+  return Ct((((1-P(pattern))^1)/action+1)^0)
+end
+local splitters_s,splitters_m,splitters_t={},{},{}
+local function splitat(separator,single)
+  local splitter=(single and splitters_s[separator]) or splitters_m[separator]
+  if not splitter then
+    separator=P(separator)
+    local other=C((1-separator)^0)
+    if single then
+      local any=anything
+      splitter=other*(separator*C(any^0)+"") 
+      splitters_s[separator]=splitter
+    else
+      splitter=other*(separator*other)^0
+      splitters_m[separator]=splitter
+    end
+  end
+  return splitter
+end
+local function tsplitat(separator)
+  local splitter=splitters_t[separator]
+  if not splitter then
+    splitter=Ct(splitat(separator))
+    splitters_t[separator]=splitter
+  end
+  return splitter
+end
+lpeg.splitat=splitat
+lpeg.tsplitat=tsplitat
+function string.splitup(str,separator)
+  if not separator then
+    separator=","
+  end
+  return lpegmatch(splitters_m[separator] or splitat(separator),str)
+end
+local cache={}
+function lpeg.split(separator,str)
+  local c=cache[separator]
+  if not c then
+    c=tsplitat(separator)
+    cache[separator]=c
+  end
+  return lpegmatch(c,str)
+end
+function string.split(str,separator)
+  if separator then
+    local c=cache[separator]
+    if not c then
+      c=tsplitat(separator)
+      cache[separator]=c
+    end
+    return lpegmatch(c,str)
+  else
+    return { str }
+  end
+end
+local spacing=patterns.spacer^0*newline 
+local empty=spacing*Cc("")
+local nonempty=Cs((1-spacing)^1)*spacing^-1
+local content=(empty+nonempty)^1
+patterns.textline=content
+local linesplitter=tsplitat(newline)
+patterns.linesplitter=linesplitter
+function string.splitlines(str)
+  return lpegmatch(linesplitter,str)
+end
+local cache={}
+function lpeg.checkedsplit(separator,str)
+  local c=cache[separator]
+  if not c then
+    separator=P(separator)
+    local other=C((1-separator)^1)
+    c=Ct(separator^0*other*(separator^1*other)^0)
+    cache[separator]=c
+  end
+  return lpegmatch(c,str)
+end
+function string.checkedsplit(str,separator)
+  local c=cache[separator]
+  if not c then
+    separator=P(separator)
+    local other=C((1-separator)^1)
+    c=Ct(separator^0*other*(separator^1*other)^0)
+    cache[separator]=c
+  end
+  return lpegmatch(c,str)
+end
+local function f2(s) local c1,c2=byte(s,1,2) return  c1*64+c2-12416 end
+local function f3(s) local c1,c2,c3=byte(s,1,3) return (c1*64+c2)*64+c3-925824 end
+local function f4(s) local c1,c2,c3,c4=byte(s,1,4) return ((c1*64+c2)*64+c3)*64+c4-63447168 end
+local utf8byte=patterns.utf8one/byte+patterns.utf8two/f2+patterns.utf8three/f3+patterns.utf8four/f4
+patterns.utf8byte=utf8byte
+local cache={}
+function lpeg.stripper(str)
+  if type(str)=="string" then
+    local s=cache[str]
+    if not s then
+      s=Cs(((S(str)^1)/""+1)^0)
+      cache[str]=s
+    end
+    return s
+  else
+    return Cs(((str^1)/""+1)^0)
+  end
+end
+local cache={}
+function lpeg.keeper(str)
+  if type(str)=="string" then
+    local s=cache[str]
+    if not s then
+      s=Cs((((1-S(str))^1)/""+1)^0)
+      cache[str]=s
+    end
+    return s
+  else
+    return Cs((((1-str)^1)/""+1)^0)
+  end
+end
+function lpeg.frontstripper(str) 
+  return (P(str)+P(true))*Cs(anything^0)
+end
+function lpeg.endstripper(str) 
+  return Cs((1-P(str)*endofstring)^0)
+end
+function lpeg.replacer(one,two,makefunction,isutf) 
+  local pattern
+  local u=isutf and utf8char or 1
+  if type(one)=="table" then
+    local no=#one
+    local p=P(false)
+    if no==0 then
+      for k,v in next,one do
+        p=p+P(k)/v
+      end
+      pattern=Cs((p+u)^0)
+    elseif no==1 then
+      local o=one[1]
+      one,two=P(o[1]),o[2]
+      pattern=Cs((one/two+u)^0)
+    else
+      for i=1,no do
+        local o=one[i]
+        p=p+P(o[1])/o[2]
+      end
+      pattern=Cs((p+u)^0)
+    end
+  else
+    pattern=Cs((P(one)/(two or "")+u)^0)
+  end
+  if makefunction then
+    return function(str)
+      return lpegmatch(pattern,str)
+    end
+  else
+    return pattern
+  end
+end
+function lpeg.finder(lst,makefunction,isutf) 
+  local pattern
+  if type(lst)=="table" then
+    pattern=P(false)
+    if #lst==0 then
+      for k,v in next,lst do
+        pattern=pattern+P(k) 
+      end
+    else
+      for i=1,#lst do
+        pattern=pattern+P(lst[i])
+      end
+    end
+  else
+    pattern=P(lst)
+  end
+  if isutf then
+    pattern=((utf8char or 1)-pattern)^0*pattern
+  else
+    pattern=(1-pattern)^0*pattern
+  end
+  if makefunction then
+    return function(str)
+      return lpegmatch(pattern,str)
+    end
+  else
+    return pattern
+  end
+end
+local splitters_f,splitters_s={},{}
+function lpeg.firstofsplit(separator) 
+  local splitter=splitters_f[separator]
+  if not splitter then
+    local pattern=P(separator)
+    splitter=C((1-pattern)^0)
+    splitters_f[separator]=splitter
+  end
+  return splitter
+end
+function lpeg.secondofsplit(separator) 
+  local splitter=splitters_s[separator]
+  if not splitter then
+    local pattern=P(separator)
+    splitter=(1-pattern)^0*pattern*C(anything^0)
+    splitters_s[separator]=splitter
+  end
+  return splitter
+end
+local splitters_s,splitters_p={},{}
+function lpeg.beforesuffix(separator) 
+  local splitter=splitters_s[separator]
+  if not splitter then
+    local pattern=P(separator)
+    splitter=C((1-pattern)^0)*pattern*endofstring
+    splitters_s[separator]=splitter
+  end
+  return splitter
+end
+function lpeg.afterprefix(separator) 
+  local splitter=splitters_p[separator]
+  if not splitter then
+    local pattern=P(separator)
+    splitter=pattern*C(anything^0)
+    splitters_p[separator]=splitter
+  end
+  return splitter
+end
+function lpeg.balancer(left,right)
+  left,right=P(left),P(right)
+  return P { left*((1-left-right)+V(1))^0*right }
+end
+local nany=utf8char/""
+function lpeg.counter(pattern)
+  pattern=Cs((P(pattern)/" "+nany)^0)
+  return function(str)
+    return #lpegmatch(pattern,str)
+  end
+end
+utf=utf or (unicode and unicode.utf8) or {}
+local utfcharacters=utf and utf.characters or string.utfcharacters
+local utfgmatch=utf and utf.gmatch
+local utfchar=utf and utf.char
+lpeg.UP=lpeg.P
+if utfcharacters then
+  function lpeg.US(str)
+    local p=P(false)
+    for uc in utfcharacters(str) do
+      p=p+P(uc)
+    end
+    return p
+  end
+elseif utfgmatch then
+  function lpeg.US(str)
+    local p=P(false)
+    for uc in utfgmatch(str,".") do
+      p=p+P(uc)
+    end
+    return p
+  end
+else
+  function lpeg.US(str)
+    local p=P(false)
+    local f=function(uc)
+      p=p+P(uc)
+    end
+    lpegmatch((utf8char/f)^0,str)
+    return p
+  end
+end
+local range=utf8byte*utf8byte+Cc(false) 
+function lpeg.UR(str,more)
+  local first,last
+  if type(str)=="number" then
+    first=str
+    last=more or first
+  else
+    first,last=lpegmatch(range,str)
+    if not last then
+      return P(str)
+    end
+  end
+  if first==last then
+    return P(str)
+  elseif utfchar and (last-first<8) then 
+    local p=P(false)
+    for i=first,last do
+      p=p+P(utfchar(i))
+    end
+    return p 
+  else
+    local f=function(b)
+      return b>=first and b<=last
+    end
+    return utf8byte/f 
+  end
+end
+function lpeg.is_lpeg(p)
+  return p and lpegtype(p)=="pattern"
+end
+function lpeg.oneof(list,...) 
+  if type(list)~="table" then
+    list={ list,... }
+  end
+  local p=P(list[1])
+  for l=2,#list do
+    p=p+P(list[l])
+  end
+  return p
+end
+local sort=table.sort
+local function copyindexed(old)
+  local new={}
+  for i=1,#old do
+    new[i]=old
+  end
+  return new
+end
+local function sortedkeys(tab)
+  local keys,s={},0
+  for key,_ in next,tab do
+    s=s+1
+    keys[s]=key
+  end
+  sort(keys)
+  return keys
+end
+function lpeg.append(list,pp,delayed,checked)
+  local p=pp
+  if #list>0 then
+    local keys=copyindexed(list)
+    sort(keys)
+    for i=#keys,1,-1 do
+      local k=keys[i]
+      if p then
+        p=P(k)+p
+      else
+        p=P(k)
+      end
+    end
+  elseif delayed then 
+    local keys=sortedkeys(list)
+    if p then
+      for i=1,#keys,1 do
+        local k=keys[i]
+        local v=list[k]
+        p=P(k)/list+p
+      end
+    else
+      for i=1,#keys do
+        local k=keys[i]
+        local v=list[k]
+        if p then
+          p=P(k)+p
+        else
+          p=P(k)
+        end
+      end
+      if p then
+        p=p/list
+      end
+    end
+  elseif checked then
+    local keys=sortedkeys(list)
+    for i=1,#keys do
+      local k=keys[i]
+      local v=list[k]
+      if p then
+        if k==v then
+          p=P(k)+p
+        else
+          p=P(k)/v+p
+        end
+      else
+        if k==v then
+          p=P(k)
+        else
+          p=P(k)/v
+        end
+      end
+    end
+  else
+    local keys=sortedkeys(list)
+    for i=1,#keys do
+      local k=keys[i]
+      local v=list[k]
+      if p then
+        p=P(k)/v+p
+      else
+        p=P(k)/v
+      end
+    end
+  end
+  return p
+end
+local p_false=P(false)
+local p_true=P(true)
+local function make(t,rest)
+  local p=p_false
+  local keys=sortedkeys(t)
+  for i=1,#keys do
+    local k=keys[i]
+    if k~="" then
+      local v=t[k]
+      if v==true then
+        p=p+P(k)*p_true
+      elseif v==false then
+      else
+        p=p+P(k)*make(v,v[""])
+      end
+    end
+  end
+  if rest then
+    p=p+p_true
+  end
+  return p
+end
+local function collapse(t,x)
+  if type(t)~="table" then
+    return t,x
+  else
+    local n=next(t)
+    if n==nil then
+      return t,x
+    elseif next(t,n)==nil then
+      local k=n
+      local v=t[k]
+      if type(v)=="table" then
+        return collapse(v,x..k)
+      else
+        return v,x..k
+      end
+    else
+      local tt={}
+      for k,v in next,t do
+        local vv,kk=collapse(v,k)
+        tt[kk]=vv
+      end
+      return tt,x
+    end
+  end
+end
+function lpeg.utfchartabletopattern(list) 
+  local tree={}
+  local n=#list
+  if n==0 then
+    for s in next,list do
+      local t=tree
+      local p,pk
+      for c in gmatch(s,".") do
+        if t==true then
+          t={ [c]=true,[""]=true }
+          p[pk]=t
+          p=t
+          t=false
+        elseif t==false then
+          t={ [c]=false }
+          p[pk]=t
+          p=t
+          t=false
+        else
+          local tc=t[c]
+          if not tc then
+            tc=false
+            t[c]=false
+          end
+          p=t
+          t=tc
+        end
+        pk=c
+      end
+      if t==false then
+        p[pk]=true
+      elseif t==true then
+      else
+        t[""]=true
+      end
+    end
+  else
+    for i=1,n do
+      local s=list[i]
+      local t=tree
+      local p,pk
+      for c in gmatch(s,".") do
+        if t==true then
+          t={ [c]=true,[""]=true }
+          p[pk]=t
+          p=t
+          t=false
+        elseif t==false then
+          t={ [c]=false }
+          p[pk]=t
+          p=t
+          t=false
+        else
+          local tc=t[c]
+          if not tc then
+            tc=false
+            t[c]=false
+          end
+          p=t
+          t=tc
+        end
+        pk=c
+      end
+      if t==false then
+        p[pk]=true
+      elseif t==true then
+      else
+        t[""]=true
+      end
+    end
+  end
+  return make(tree)
+end
+patterns.containseol=lpeg.finder(eol)
+local function nextstep(n,step,result)
+  local m=n%step   
+  local d=floor(n/step) 
+  if d>0 then
+    local v=V(tostring(step))
+    local s=result.start
+    for i=1,d do
+      if s then
+        s=v*s
+      else
+        s=v
+      end
+    end
+    result.start=s
+  end
+  if step>1 and result.start then
+    local v=V(tostring(step/2))
+    result[tostring(step)]=v*v
+  end
+  if step>0 then
+    return nextstep(m,step/2,result)
+  else
+    return result
+  end
+end
+function lpeg.times(pattern,n)
+  return P(nextstep(n,2^16,{ "start",["1"]=pattern }))
+end
+local trailingzeros=zero^0*-digit 
+local case_1=period*trailingzeros/""
+local case_2=period*(digit-trailingzeros)^1*(trailingzeros/"")
+local number=digit^1*(case_1+case_2)
+local stripper=Cs((number+1)^0)
+lpeg.patterns.stripzeros=stripper
+local byte_to_HEX={}
+local byte_to_hex={}
+local byte_to_dec={} 
+local hex_to_byte={}
+for i=0,255 do
+  local H=format("%02X",i)
+  local h=format("%02x",i)
+  local d=format("%03i",i)
+  local c=char(i)
+  byte_to_HEX[c]=H
+  byte_to_hex[c]=h
+  byte_to_dec[c]=d
+  hex_to_byte[h]=c
+  hex_to_byte[H]=c
+end
+local hextobyte=P(2)/hex_to_byte
+local bytetoHEX=P(1)/byte_to_HEX
+local bytetohex=P(1)/byte_to_hex
+local bytetodec=P(1)/byte_to_dec
+local hextobytes=Cs(hextobyte^0)
+local bytestoHEX=Cs(bytetoHEX^0)
+local bytestohex=Cs(bytetohex^0)
+local bytestodec=Cs(bytetodec^0)
+patterns.hextobyte=hextobyte
+patterns.bytetoHEX=bytetoHEX
+patterns.bytetohex=bytetohex
+patterns.bytetodec=bytetodec
+patterns.hextobytes=hextobytes
+patterns.bytestoHEX=bytestoHEX
+patterns.bytestohex=bytestohex
+patterns.bytestodec=bytestodec
+function string.toHEX(s)
+  if not s or s=="" then
+    return s
+  else
+    return lpegmatch(bytestoHEX,s)
+  end
+end
+function string.tohex(s)
+  if not s or s=="" then
+    return s
+  else
+    return lpegmatch(bytestohex,s)
+  end
+end
+function string.todec(s)
+  if not s or s=="" then
+    return s
+  else
+    return lpegmatch(bytestodec,s)
+  end
+end
+function string.tobytes(s)
+  if not s or s=="" then
+    return s
+  else
+    return lpegmatch(hextobytes,s)
+  end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['l-functions']={
+  version=1.001,
+  comment="companion to luat-lib.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+functions=functions or {}
+function functions.dummy() end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['l-string']={
+  version=1.001,
+  comment="companion to luat-lib.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local string=string
+local sub,gmatch,format,char,byte,rep,lower=string.sub,string.gmatch,string.format,string.char,string.byte,string.rep,string.lower
+local lpegmatch,patterns=lpeg.match,lpeg.patterns
+local P,S,C,Ct,Cc,Cs=lpeg.P,lpeg.S,lpeg.C,lpeg.Ct,lpeg.Cc,lpeg.Cs
+local unquoted=patterns.squote*C(patterns.nosquote)*patterns.squote+patterns.dquote*C(patterns.nodquote)*patterns.dquote
+function string.unquoted(str)
+  return lpegmatch(unquoted,str) or str
+end
+function string.quoted(str)
+  return format("%q",str) 
+end
+function string.count(str,pattern) 
+  local n=0
+  for _ in gmatch(str,pattern) do 
+    n=n+1
+  end
+  return n
+end
+function string.limit(str,n,sentinel) 
+  if #str>n then
+    sentinel=sentinel or "..."
+    return sub(str,1,(n-#sentinel))..sentinel
+  else
+    return str
+  end
+end
+local stripper=patterns.stripper
+local fullstripper=patterns.fullstripper
+local collapser=patterns.collapser
+local nospacer=patterns.nospacer
+local longtostring=patterns.longtostring
+function string.strip(str)
+  return str and lpegmatch(stripper,str) or ""
+end
+function string.fullstrip(str)
+  return str and lpegmatch(fullstripper,str) or ""
+end
+function string.collapsespaces(str)
+  return str and lpegmatch(collapser,str) or ""
+end
+function string.nospaces(str)
+  return str and lpegmatch(nospacer,str) or ""
+end
+function string.longtostring(str)
+  return str and lpegmatch(longtostring,str) or ""
+end
+local pattern=P(" ")^0*P(-1)
+function string.is_empty(str)
+  if not str or str=="" then
+    return true
+  else
+    return lpegmatch(pattern,str) and true or false
+  end
+end
+local anything=patterns.anything
+local allescapes=Cc("%")*S(".-+%?()[]*") 
+local someescapes=Cc("%")*S(".-+%()[]")  
+local matchescapes=Cc(".")*S("*?")     
+local pattern_a=Cs ((allescapes+anything )^0 )
+local pattern_b=Cs ((someescapes+matchescapes+anything )^0 )
+local pattern_c=Cs (Cc("^")*(someescapes+matchescapes+anything )^0*Cc("$") )
+function string.escapedpattern(str,simple)
+  return lpegmatch(simple and pattern_b or pattern_a,str)
+end
+function string.topattern(str,lowercase,strict)
+  if str=="" or type(str)~="string" then
+    return ".*"
+  elseif strict then
+    str=lpegmatch(pattern_c,str)
+  else
+    str=lpegmatch(pattern_b,str)
+  end
+  if lowercase then
+    return lower(str)
+  else
+    return str
+  end
+end
+function string.valid(str,default)
+  return (type(str)=="string" and str~="" and str) or default or nil
+end
+string.itself=function(s) return s end
+local pattern_c=Ct(C(1)^0) 
+local pattern_b=Ct((C(1)/byte)^0)
+function string.totable(str,bytes)
+  return lpegmatch(bytes and pattern_b or pattern_c,str)
+end
+local replacer=lpeg.replacer("@","%%") 
+function string.tformat(fmt,...)
+  return format(lpegmatch(replacer,fmt),...)
+end
+string.quote=string.quoted
+string.unquote=string.unquoted
+if not string.bytetable then
+  local limit=5000 
+  function string.bytetable(str)
+    local n=#str
+    if n>limit then
+      local t={ byte(str,1,limit) }
+      for i=limit+1,n do
+        t[i]=byte(str,i)
+      end
+      return t
+    else
+      return { byte(str,1,n) }
+    end
+  end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['l-table']={
+  version=1.001,
+  comment="companion to luat-lib.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local type,next,tostring,tonumber,ipairs,select=type,next,tostring,tonumber,ipairs,select
+local table,string=table,string
+local concat,sort,insert,remove=table.concat,table.sort,table.insert,table.remove
+local format,lower,dump=string.format,string.lower,string.dump
+local getmetatable,setmetatable=getmetatable,setmetatable
+local getinfo=debug.getinfo
+local lpegmatch,patterns=lpeg.match,lpeg.patterns
+local floor=math.floor
+local stripper=patterns.stripper
+function table.strip(tab)
+  local lst,l={},0
+  for i=1,#tab do
+    local s=lpegmatch(stripper,tab[i]) or ""
+    if s=="" then
+    else
+      l=l+1
+      lst[l]=s
+    end
+  end
+  return lst
+end
+function table.keys(t)
+  if t then
+    local keys,k={},0
+    for key in next,t do
+      k=k+1
+      keys[k]=key
+    end
+    return keys
+  else
+    return {}
+  end
+end
+local function compare(a,b)
+  local ta=type(a) 
+  if ta=="number" then
+    local tb=type(b) 
+    if ta==tb then
+      return a<b
+    elseif tb=="string" then
+      return tostring(a)<b
+    end
+  elseif ta=="string" then
+    local tb=type(b) 
+    if ta==tb then
+      return a<b
+    else
+      return a<tostring(b)
+    end
+  end
+  return tostring(a)<tostring(b) 
+end
+local function sortedkeys(tab)
+  if tab then
+    local srt,category,s={},0,0 
+    for key in next,tab do
+      s=s+1
+      srt[s]=key
+      if category==3 then
+      elseif category==1 then
+        if type(key)~="string" then
+          category=3
+        end
+      elseif category==2 then
+        if type(key)~="number" then
+          category=3
+        end
+      else
+        local tkey=type(key)
+        if tkey=="string" then
+          category=1
+        elseif tkey=="number" then
+          category=2
+        else
+          category=3
+        end
+      end
+    end
+    if s<2 then
+    elseif category==3 then
+      sort(srt,compare)
+    else
+      sort(srt)
+    end
+    return srt
+  else
+    return {}
+  end
+end
+local function sortedhashonly(tab)
+  if tab then
+    local srt,s={},0
+    for key in next,tab do
+      if type(key)=="string" then
+        s=s+1
+        srt[s]=key
+      end
+    end
+    if s>1 then
+      sort(srt)
+    end
+    return srt
+  else
+    return {}
+  end
+end
+local function sortedindexonly(tab)
+  if tab then
+    local srt,s={},0
+    for key in next,tab do
+      if type(key)=="number" then
+        s=s+1
+        srt[s]=key
+      end
+    end
+    if s>1 then
+      sort(srt)
+    end
+    return srt
+  else
+    return {}
+  end
+end
+local function sortedhashkeys(tab,cmp) 
+  if tab then
+    local srt,s={},0
+    for key in next,tab do
+      if key then
+        s=s+1
+        srt[s]=key
+      end
+    end
+    if s>1 then
+      sort(srt,cmp)
+    end
+    return srt
+  else
+    return {}
+  end
+end
+function table.allkeys(t)
+  local keys={}
+  for k,v in next,t do
+    for k in next,v do
+      keys[k]=true
+    end
+  end
+  return sortedkeys(keys)
+end
+table.sortedkeys=sortedkeys
+table.sortedhashonly=sortedhashonly
+table.sortedindexonly=sortedindexonly
+table.sortedhashkeys=sortedhashkeys
+local function nothing() end
+local function sortedhash(t,cmp)
+  if t then
+    local s
+    if cmp then
+      s=sortedhashkeys(t,function(a,b) return cmp(t,a,b) end)
+    else
+      s=sortedkeys(t) 
+    end
+    local m=#s
+    if m==1 then
+      return next,t
+    elseif m>0 then
+      local n=0
+      return function()
+        if n<m then
+          n=n+1
+          local k=s[n]
+          return k,t[k]
+        end
+      end
+    end
+  end
+  return nothing
+end
+table.sortedhash=sortedhash
+table.sortedpairs=sortedhash 
+function table.append(t,list)
+  local n=#t
+  for i=1,#list do
+    n=n+1
+    t[n]=list[i]
+  end
+  return t
+end
+function table.prepend(t,list)
+  local nl=#list
+  local nt=nl+#t
+  for i=#t,1,-1 do
+    t[nt]=t[i]
+    nt=nt-1
+  end
+  for i=1,#list do
+    t[i]=list[i]
+  end
+  return t
+end
+function table.merge(t,...) 
+  t=t or {}
+  for i=1,select("#",...) do
+    for k,v in next,(select(i,...)) do
+      t[k]=v
+    end
+  end
+  return t
+end
+function table.merged(...)
+  local t={}
+  for i=1,select("#",...) do
+    for k,v in next,(select(i,...)) do
+      t[k]=v
+    end
+  end
+  return t
+end
+function table.imerge(t,...)
+  local nt=#t
+  for i=1,select("#",...) do
+    local nst=select(i,...)
+    for j=1,#nst do
+      nt=nt+1
+      t[nt]=nst[j]
+    end
+  end
+  return t
+end
+function table.imerged(...)
+  local tmp,ntmp={},0
+  for i=1,select("#",...) do
+    local nst=select(i,...)
+    for j=1,#nst do
+      ntmp=ntmp+1
+      tmp[ntmp]=nst[j]
+    end
+  end
+  return tmp
+end
+local function fastcopy(old,metatabletoo) 
+  if old then
+    local new={}
+    for k,v in next,old do
+      if type(v)=="table" then
+        new[k]=fastcopy(v,metatabletoo) 
+      else
+        new[k]=v
+      end
+    end
+    if metatabletoo then
+      local mt=getmetatable(old)
+      if mt then
+        setmetatable(new,mt)
+      end
+    end
+    return new
+  else
+    return {}
+  end
+end
+local function copy(t,tables) 
+  tables=tables or {}
+  local tcopy={}
+  if not tables[t] then
+    tables[t]=tcopy
+  end
+  for i,v in next,t do 
+    if type(i)=="table" then
+      if tables[i] then
+        i=tables[i]
+      else
+        i=copy(i,tables)
+      end
+    end
+    if type(v)~="table" then
+      tcopy[i]=v
+    elseif tables[v] then
+      tcopy[i]=tables[v]
+    else
+      tcopy[i]=copy(v,tables)
+    end
+  end
+  local mt=getmetatable(t)
+  if mt then
+    setmetatable(tcopy,mt)
+  end
+  return tcopy
+end
+table.fastcopy=fastcopy
+table.copy=copy
+function table.derive(parent) 
+  local child={}
+  if parent then
+    setmetatable(child,{ __index=parent })
+  end
+  return child
+end
+function table.tohash(t,value)
+  local h={}
+  if t then
+    if value==nil then value=true end
+    for _,v in next,t do 
+      h[v]=value
+    end
+  end
+  return h
+end
+function table.fromhash(t)
+  local hsh,h={},0
+  for k,v in next,t do 
+    if v then
+      h=h+1
+      hsh[h]=k
+    end
+  end
+  return hsh
+end
+local noquotes,hexify,handle,compact,inline,functions,metacheck
+local reserved=table.tohash { 
+  'and','break','do','else','elseif','end','false','for','function','if',
+  'in','local','nil','not','or','repeat','return','then','true','until','while',
+  'NaN','goto',
+}
+local function is_simple_table(t,hexify) 
+  local nt=#t
+  if nt>0 then
+    local n=0
+    for _,v in next,t do
+      n=n+1
+      if type(v)=="table" then
+        return nil
+      end
+    end
+    local haszero=rawget(t,0) 
+    if n==nt then
+      local tt={}
+      for i=1,nt do
+        local v=t[i]
+        local tv=type(v)
+        if tv=="number" then
+          if hexify then
+            tt[i]=format("0x%X",v)
+          else
+            tt[i]=v 
+          end
+        elseif tv=="string" then
+          tt[i]=format("%q",v) 
+        elseif tv=="boolean" then
+          tt[i]=v and "true" or "false"
+        else
+          return nil
+        end
+      end
+      return tt
+    elseif haszero and (n==nt+1) then
+      local tt={}
+      for i=0,nt do
+        local v=t[i]
+        local tv=type(v)
+        if tv=="number" then
+          if hexify then
+            tt[i+1]=format("0x%X",v)
+          else
+            tt[i+1]=v 
+          end
+        elseif tv=="string" then
+          tt[i+1]=format("%q",v) 
+        elseif tv=="boolean" then
+          tt[i+1]=v and "true" or "false"
+        else
+          return nil
+        end
+      end
+      tt[1]="[0] = "..tt[1]
+      return tt
+    end
+  end
+  return nil
+end
+table.is_simple_table=is_simple_table
+local propername=patterns.propername 
+local function dummy() end
+local function do_serialize(root,name,depth,level,indexed)
+  if level>0 then
+    depth=depth.." "
+    if indexed then
+      handle(format("%s{",depth))
+    else
+      local tn=type(name)
+      if tn=="number" then
+        if hexify then
+          handle(format("%s[0x%X]={",depth,name))
+        else
+          handle(format("%s[%s]={",depth,name))
+        end
+      elseif tn=="string" then
+        if noquotes and not reserved[name] and lpegmatch(propername,name) then
+          handle(format("%s%s={",depth,name))
+        else
+          handle(format("%s[%q]={",depth,name))
+        end
+      elseif tn=="boolean" then
+        handle(format("%s[%s]={",depth,name and "true" or "false"))
+      else
+        handle(format("%s{",depth))
+      end
+    end
+  end
+  if root and next(root)~=nil then
+    local first,last=nil,0
+    if compact then
+      last=#root
+      for k=1,last do
+        if rawget(root,k)==nil then
+          last=k-1
+          break
+        end
+      end
+      if last>0 then
+        first=1
+      end
+    end
+    local sk=sortedkeys(root)
+    for i=1,#sk do
+      local k=sk[i]
+      local v=root[k]
+      local tv=type(v)
+      local tk=type(k)
+      if compact and first and tk=="number" and k>=first and k<=last then
+        if tv=="number" then
+          if hexify then
+            handle(format("%s 0x%X,",depth,v))
+          else
+            handle(format("%s %s,",depth,v)) 
+          end
+        elseif tv=="string" then
+          handle(format("%s %q,",depth,v))
+        elseif tv=="table" then
+          if next(v)==nil then
+            handle(format("%s {},",depth))
+          elseif inline then 
+            local st=is_simple_table(v,hexify)
+            if st then
+              handle(format("%s { %s },",depth,concat(st,", ")))
+            else
+              do_serialize(v,k,depth,level+1,true)
+            end
+          else
+            do_serialize(v,k,depth,level+1,true)
+          end
+        elseif tv=="boolean" then
+          handle(format("%s %s,",depth,v and "true" or "false"))
+        elseif tv=="function" then
+          if functions then
+            handle(format('%s load(%q),',depth,dump(v))) 
+          else
+            handle(format('%s "function",',depth))
+          end
+        else
+          handle(format("%s %q,",depth,tostring(v)))
+        end
+      elseif k=="__p__" then 
+        if false then
+          handle(format("%s __p__=nil,",depth))
+        end
+      elseif tv=="number" then
+        if tk=="number" then
+          if hexify then
+            handle(format("%s [0x%X]=0x%X,",depth,k,v))
+          else
+            handle(format("%s [%s]=%s,",depth,k,v)) 
+          end
+        elseif tk=="boolean" then
+          if hexify then
+            handle(format("%s [%s]=0x%X,",depth,k and "true" or "false",v))
+          else
+            handle(format("%s [%s]=%s,",depth,k and "true" or "false",v)) 
+          end
+        elseif tk~="string" then
+        elseif noquotes and not reserved[k] and lpegmatch(propername,k) then
+          if hexify then
+            handle(format("%s %s=0x%X,",depth,k,v))
+          else
+            handle(format("%s %s=%s,",depth,k,v)) 
+          end
+        else
+          if hexify then
+            handle(format("%s [%q]=0x%X,",depth,k,v))
+          else
+            handle(format("%s [%q]=%s,",depth,k,v)) 
+          end
+        end
+      elseif tv=="string" then
+        if tk=="number" then
+          if hexify then
+            handle(format("%s [0x%X]=%q,",depth,k,v))
+          else
+            handle(format("%s [%s]=%q,",depth,k,v))
+          end
+        elseif tk=="boolean" then
+          handle(format("%s [%s]=%q,",depth,k and "true" or "false",v))
+        elseif tk~="string" then
+        elseif noquotes and not reserved[k] and lpegmatch(propername,k) then
+          handle(format("%s %s=%q,",depth,k,v))
+        else
+          handle(format("%s [%q]=%q,",depth,k,v))
+        end
+      elseif tv=="table" then
+        if next(v)==nil then
+          if tk=="number" then
+            if hexify then
+              handle(format("%s [0x%X]={},",depth,k))
+            else
+              handle(format("%s [%s]={},",depth,k))
+            end
+          elseif tk=="boolean" then
+            handle(format("%s [%s]={},",depth,k and "true" or "false"))
+          elseif tk~="string" then
+          elseif noquotes and not reserved[k] and lpegmatch(propername,k) then
+            handle(format("%s %s={},",depth,k))
+          else
+            handle(format("%s [%q]={},",depth,k))
+          end
+        elseif inline then
+          local st=is_simple_table(v,hexify)
+          if st then
+            if tk=="number" then
+              if hexify then
+                handle(format("%s [0x%X]={ %s },",depth,k,concat(st,", ")))
+              else
+                handle(format("%s [%s]={ %s },",depth,k,concat(st,", ")))
+              end
+            elseif tk=="boolean" then
+              handle(format("%s [%s]={ %s },",depth,k and "true" or "false",concat(st,", ")))
+            elseif tk~="string" then
+            elseif noquotes and not reserved[k] and lpegmatch(propername,k) then
+              handle(format("%s %s={ %s },",depth,k,concat(st,", ")))
+            else
+              handle(format("%s [%q]={ %s },",depth,k,concat(st,", ")))
+            end
+          else
+            do_serialize(v,k,depth,level+1)
+          end
+        else
+          do_serialize(v,k,depth,level+1)
+        end
+      elseif tv=="boolean" then
+        if tk=="number" then
+          if hexify then
+            handle(format("%s [0x%X]=%s,",depth,k,v and "true" or "false"))
+          else
+            handle(format("%s [%s]=%s,",depth,k,v and "true" or "false"))
+          end
+        elseif tk=="boolean" then
+          handle(format("%s [%s]=%s,",depth,tostring(k),v and "true" or "false"))
+        elseif tk~="string" then
+        elseif noquotes and not reserved[k] and lpegmatch(propername,k) then
+          handle(format("%s %s=%s,",depth,k,v and "true" or "false"))
+        else
+          handle(format("%s [%q]=%s,",depth,k,v and "true" or "false"))
+        end
+      elseif tv=="function" then
+        if functions then
+          local f=getinfo(v).what=="C" and dump(dummy) or dump(v)
+          if tk=="number" then
+            if hexify then
+              handle(format("%s [0x%X]=load(%q),",depth,k,f))
+            else
+              handle(format("%s [%s]=load(%q),",depth,k,f))
+            end
+          elseif tk=="boolean" then
+            handle(format("%s [%s]=load(%q),",depth,k and "true" or "false",f))
+          elseif tk~="string" then
+          elseif noquotes and not reserved[k] and lpegmatch(propername,k) then
+            handle(format("%s %s=load(%q),",depth,k,f))
+          else
+            handle(format("%s [%q]=load(%q),",depth,k,f))
+          end
+        end
+      else
+        if tk=="number" then
+          if hexify then
+            handle(format("%s [0x%X]=%q,",depth,k,tostring(v)))
+          else
+            handle(format("%s [%s]=%q,",depth,k,tostring(v)))
+          end
+        elseif tk=="boolean" then
+          handle(format("%s [%s]=%q,",depth,k and "true" or "false",tostring(v)))
+        elseif tk~="string" then
+        elseif noquotes and not reserved[k] and lpegmatch(propername,k) then
+          handle(format("%s %s=%q,",depth,k,tostring(v)))
+        else
+          handle(format("%s [%q]=%q,",depth,k,tostring(v)))
+        end
+      end
+    end
+  end
+  if level>0 then
+    handle(format("%s},",depth))
+  end
+end
+local function serialize(_handle,root,name,specification) 
+  local tname=type(name)
+  if type(specification)=="table" then
+    noquotes=specification.noquotes
+    hexify=specification.hexify
+    handle=_handle or specification.handle or print
+    functions=specification.functions
+    compact=specification.compact
+    inline=specification.inline and compact
+    metacheck=specification.metacheck
+    if functions==nil then
+      functions=true
+    end
+    if compact==nil then
+      compact=true
+    end
+    if inline==nil then
+      inline=compact
+    end
+    if metacheck==nil then
+      metacheck=true
+    end
+  else
+    noquotes=false
+    hexify=false
+    handle=_handle or print
+    compact=true
+    inline=true
+    functions=true
+    metacheck=true
+  end
+  if tname=="string" then
+    if name=="return" then
+      handle("return {")
+    else
+      handle(name.."={")
+    end
+  elseif tname=="number" then
+    if hexify then
+      handle(format("[0x%X]={",name))
+    else
+      handle("["..name.."]={")
+    end
+  elseif tname=="boolean" then
+    if name then
+      handle("return {")
+    else
+      handle("{")
+    end
+  else
+    handle("t={")
+  end
+  if root then
+    if metacheck and getmetatable(root) then
+      local dummy=root._w_h_a_t_e_v_e_r_
+      root._w_h_a_t_e_v_e_r_=nil
+    end
+    if next(root)~=nil then
+      do_serialize(root,name,"",0)
+    end
+  end
+  handle("}")
+end
+function table.serialize(root,name,specification)
+  local t,n={},0
+  local function flush(s)
+    n=n+1
+    t[n]=s
+  end
+  serialize(flush,root,name,specification)
+  return concat(t,"\n")
+end
+table.tohandle=serialize
+local maxtab=2*1024
+function table.tofile(filename,root,name,specification)
+  local f=io.open(filename,'w')
+  if f then
+    if maxtab>1 then
+      local t,n={},0
+      local function flush(s)
+        n=n+1
+        t[n]=s
+        if n>maxtab then
+          f:write(concat(t,"\n"),"\n") 
+          t,n={},0 
+        end
+      end
+      serialize(flush,root,name,specification)
+      f:write(concat(t,"\n"),"\n")
+    else
+      local function flush(s)
+        f:write(s,"\n")
+      end
+      serialize(flush,root,name,specification)
+    end
+    f:close()
+    io.flush()
+  end
+end
+local function flattened(t,f,depth) 
+  if f==nil then
+    f={}
+    depth=0xFFFF
+  elseif tonumber(f) then
+    depth=f
+    f={}
+  elseif not depth then
+    depth=0xFFFF
+  end
+  for k,v in next,t do
+    if type(k)~="number" then
+      if depth>0 and type(v)=="table" then
+        flattened(v,f,depth-1)
+      else
+        f[#f+1]=v
+      end
+    end
+  end
+  for k=1,#t do
+    local v=t[k]
+    if depth>0 and type(v)=="table" then
+      flattened(v,f,depth-1)
+    else
+      f[#f+1]=v
+    end
+  end
+  return f
+end
+table.flattened=flattened
+local function collapsed(t,f,h)
+  if f==nil then
+    f={}
+    h={}
+  end
+  for k=1,#t do
+    local v=t[k]
+    if type(v)=="table" then
+      collapsed(v,f,h)
+    elseif not h[v] then
+      f[#f+1]=v
+      h[v]=true
+    end
+  end
+  return f
+end
+local function collapsedhash(t,h)
+  if h==nil then
+    h={}
+  end
+  for k=1,#t do
+    local v=t[k]
+    if type(v)=="table" then
+      collapsedhash(v,h)
+    else
+      h[v]=true
+    end
+  end
+  return h
+end
+table.collapsed=collapsed   
+table.collapsedhash=collapsedhash
+local function unnest(t,f) 
+  if not f then     
+    f={}      
+  end
+  for i=1,#t do
+    local v=t[i]
+    if type(v)=="table" then
+      if type(v[1])=="table" then
+        unnest(v,f)
+      else
+        f[#f+1]=v
+      end
+    else
+      f[#f+1]=v
+    end
+  end
+  return f
+end
+function table.unnest(t) 
+  return unnest(t)
+end
+local function are_equal(a,b,n,m) 
+  if a==b then
+    return true
+  elseif a and b and #a==#b then
+    n=n or 1
+    m=m or #a
+    for i=n,m do
+      local ai,bi=a[i],b[i]
+      if ai==bi then
+      elseif type(ai)=="table" and type(bi)=="table" then
+        if not are_equal(ai,bi) then
+          return false
+        end
+      else
+        return false
+      end
+    end
+    return true
+  else
+    return false
+  end
+end
+local function identical(a,b) 
+  if a~=b then
+    for ka,va in next,a do
+      local vb=b[ka]
+      if va==vb then
+      elseif type(va)=="table" and type(vb)=="table" then
+        if not identical(va,vb) then
+          return false
+        end
+      else
+        return false
+      end
+    end
+  end
+  return true
+end
+table.identical=identical
+table.are_equal=are_equal
+local function sparse(old,nest,keeptables)
+  local new={}
+  for k,v in next,old do
+    if not (v=="" or v==false) then
+      if nest and type(v)=="table" then
+        v=sparse(v,nest)
+        if keeptables or next(v)~=nil then
+          new[k]=v
+        end
+      else
+        new[k]=v
+      end
+    end
+  end
+  return new
+end
+table.sparse=sparse
+function table.compact(t)
+  return sparse(t,true,true)
+end
+function table.contains(t,v)
+  if t then
+    for i=1,#t do
+      if t[i]==v then
+        return i
+      end
+    end
+  end
+  return false
+end
+function table.count(t)
+  local n=0
+  for k,v in next,t do
+    n=n+1
+  end
+  return n
+end
+function table.swapped(t,s) 
+  local n={}
+  if s then
+    for k,v in next,s do
+      n[k]=v
+    end
+  end
+  for k,v in next,t do
+    n[v]=k
+  end
+  return n
+end
+function table.hashed(t) 
+  for i=1,#t do
+    t[t[i]]=i
+  end
+  return t
+end
+function table.mirrored(t) 
+  local n={}
+  for k,v in next,t do
+    n[v]=k
+    n[k]=v
+  end
+  return n
+end
+function table.reversed(t)
+  if t then
+    local tt,tn={},#t
+    if tn>0 then
+      local ttn=0
+      for i=tn,1,-1 do
+        ttn=ttn+1
+        tt[ttn]=t[i]
+      end
+    end
+    return tt
+  end
+end
+function table.reverse(t)
+  if t then
+    local n=#t
+    for i=1,floor(n/2) do
+      local j=n-i+1
+      t[i],t[j]=t[j],t[i]
+    end
+    return t
+  end
+end
+function table.sequenced(t,sep,simple) 
+  if not t then
+    return ""
+  end
+  local n=#t
+  local s={}
+  if n>0 then
+    for i=1,n do
+      s[i]=tostring(t[i])
+    end
+  else
+    n=0
+    for k,v in sortedhash(t) do
+      if simple then
+        if v==true then
+          n=n+1
+          s[n]=k
+        elseif v and v~="" then
+          n=n+1
+          s[n]=k.."="..tostring(v)
+        end
+      else
+        n=n+1
+        s[n]=k.."="..tostring(v)
+      end
+    end
+  end
+  return concat(s,sep or " | ")
+end
+function table.print(t,...)
+  if type(t)~="table" then
+    print(tostring(t))
+  else
+    serialize(print,t,...)
+  end
+end
+if setinspector then
+  setinspector("table",function(v) if type(v)=="table" then serialize(print,v,"table") return true end end)
+end
+function table.sub(t,i,j)
+  return { unpack(t,i,j) }
+end
+function table.is_empty(t)
+  return not t or next(t)==nil
+end
+function table.has_one_entry(t)
+  return t and next(t,next(t))==nil
+end
+function table.loweredkeys(t) 
+  local l={}
+  for k,v in next,t do
+    l[lower(k)]=v
+  end
+  return l
+end
+function table.unique(old)
+  local hash={}
+  local new={}
+  local n=0
+  for i=1,#old do
+    local oi=old[i]
+    if not hash[oi] then
+      n=n+1
+      new[n]=oi
+      hash[oi]=true
+    end
+  end
+  return new
+end
+function table.sorted(t,...)
+  sort(t,...)
+  return t 
+end
+function table.values(t,s) 
+  if t then
+    local values,keys,v={},{},0
+    for key,value in next,t do
+      if not keys[value] then
+        v=v+1
+        values[v]=value
+        keys[k]=key
+      end
+    end
+    if s then
+      sort(values)
+    end
+    return values
+  else
+    return {}
+  end
+end
+function table.filtered(t,pattern,sort,cmp)
+  if t and type(pattern)=="string" then
+    if sort then
+      local s
+      if cmp then
+        s=sortedhashkeys(t,function(a,b) return cmp(t,a,b) end)
+      else
+        s=sortedkeys(t) 
+      end
+      local n=0
+      local m=#s
+      local function kv(s)
+        while n<m do
+          n=n+1
+          local k=s[n]
+          if find(k,pattern) then
+            return k,t[k]
+          end
+        end
+      end
+      return kv,s
+    else
+      local n=next(t)
+      local function iterator()
+        while n~=nil do
+          local k=n
+          n=next(t,k)
+          if find(k,pattern) then
+            return k,t[k]
+          end
+        end
+      end
+      return iterator,t
+    end
+  else
+    return nothing
+  end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['l-io']={
+  version=1.001,
+  comment="companion to luat-lib.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local io=io
+local open,flush,write,read=io.open,io.flush,io.write,io.read
+local byte,find,gsub,format=string.byte,string.find,string.gsub,string.format
+local concat=table.concat
+local floor=math.floor
+local type=type
+if string.find(os.getenv("PATH"),";",1,true) then
+  io.fileseparator,io.pathseparator="\\",";"
+else
+  io.fileseparator,io.pathseparator="/",":"
+end
+local large=2^24    
+local medium=large/16 
+local small=medium/8
+local function readall(f)
+  local size=f:seek("end")
+  if size>0 then
+    f:seek("set",0)
+    return f:read(size)
+  else
+    return ""
+  end
+end
+io.readall=readall
+function io.loaddata(filename,textmode) 
+  local f=open(filename,(textmode and 'r') or 'rb')
+  if f then
+    local size=f:seek("end")
+    local data=nil
+    if size>0 then
+      f:seek("set",0)
+      data=f:read(size)
+    end
+    f:close()
+    return data
+  end
+end
+function io.copydata(source,target,action)
+  local f=open(source,"rb")
+  if f then
+    local g=open(target,"wb")
+    if g then
+      local size=f:seek("end")
+      if size>0 then
+        f:seek("set",0)
+        local data=f:read(size)
+        if action then
+          data=action(data)
+        end
+        if data then
+          g:write(data)
+        end
+      end
+      g:close()
+    end
+    f:close()
+    flush()
+  end
+end
+function io.savedata(filename,data,joiner)
+  local f=open(filename,"wb")
+  if f then
+    if type(data)=="table" then
+      f:write(concat(data,joiner or ""))
+    elseif type(data)=="function" then
+      data(f)
+    else
+      f:write(data or "")
+    end
+    f:close()
+    flush()
+    return true
+  else
+    return false
+  end
+end
+if fio and fio.readline then
+  local readline=fio.readline
+  function io.loadlines(filename,n) 
+    local f=open(filename,'r')
+    if not f then
+    elseif n then
+      local lines={}
+      for i=1,n do
+        local line=readline(f)
+        if line then
+          lines[i]=line
+        else
+          break
+        end
+      end
+      f:close()
+      lines=concat(lines,"\n")
+      if #lines>0 then
+        return lines
+      end
+    else
+      local line=readline(f)
+      f:close()
+      if line and #line>0 then
+        return line
+      end
+    end
+  end
+else
+  function io.loadlines(filename,n) 
+    local f=open(filename,'r')
+    if not f then
+    elseif n then
+      local lines={}
+      for i=1,n do
+        local line=f:read("*lines")
+        if line then
+          lines[i]=line
+        else
+          break
+        end
+      end
+      f:close()
+      lines=concat(lines,"\n")
+      if #lines>0 then
+        return lines
+      end
+    else
+      local line=f:read("*line") or ""
+      f:close()
+      if #line>0 then
+        return line
+      end
+    end
+  end
+end
+function io.loadchunk(filename,n)
+  local f=open(filename,'rb')
+  if f then
+    local data=f:read(n or 1024)
+    f:close()
+    if #data>0 then
+      return data
+    end
+  end
+end
+function io.exists(filename)
+  local f=open(filename)
+  if f==nil then
+    return false
+  else
+    f:close()
+    return true
+  end
+end
+function io.size(filename)
+  local f=open(filename)
+  if f==nil then
+    return 0
+  else
+    local s=f:seek("end")
+    f:close()
+    return s
+  end
+end
+local function noflines(f)
+  if type(f)=="string" then
+    local f=open(filename)
+    if f then
+      local n=f and noflines(f) or 0
+      f:close()
+      return n
+    else
+      return 0
+    end
+  else
+    local n=0
+    for _ in f:lines() do
+      n=n+1
+    end
+    f:seek('set',0)
+    return n
+  end
+end
+io.noflines=noflines
+local nextchar={
+  [ 4]=function(f)
+    return f:read(1,1,1,1)
+  end,
+  [ 2]=function(f)
+    return f:read(1,1)
+  end,
+  [ 1]=function(f)
+    return f:read(1)
+  end,
+  [-2]=function(f)
+    local a,b=f:read(1,1)
+    return b,a
+  end,
+  [-4]=function(f)
+    local a,b,c,d=f:read(1,1,1,1)
+    return d,c,b,a
+  end
+}
+function io.characters(f,n)
+  if f then
+    return nextchar[n or 1],f
+  end
+end
+local nextbyte={
+  [4]=function(f)
+    local a,b,c,d=f:read(1,1,1,1)
+    if d then
+      return byte(a),byte(b),byte(c),byte(d)
+    end
+  end,
+  [3]=function(f)
+    local a,b,c=f:read(1,1,1)
+    if b then
+      return byte(a),byte(b),byte(c)
+    end
+  end,
+  [2]=function(f)
+    local a,b=f:read(1,1)
+    if b then
+      return byte(a),byte(b)
+    end
+  end,
+  [1]=function (f)
+    local a=f:read(1)
+    if a then
+      return byte(a)
+    end
+  end,
+  [-2]=function (f)
+    local a,b=f:read(1,1)
+    if b then
+      return byte(b),byte(a)
+    end
+  end,
+  [-3]=function(f)
+    local a,b,c=f:read(1,1,1)
+    if b then
+      return byte(c),byte(b),byte(a)
+    end
+  end,
+  [-4]=function(f)
+    local a,b,c,d=f:read(1,1,1,1)
+    if d then
+      return byte(d),byte(c),byte(b),byte(a)
+    end
+  end
+}
+function io.bytes(f,n)
+  if f then
+    return nextbyte[n or 1],f
+  else
+    return nil,nil
+  end
+end
+function io.ask(question,default,options)
+  while true do
+    write(question)
+    if options then
+      write(format(" [%s]",concat(options,"|")))
+    end
+    if default then
+      write(format(" [%s]",default))
+    end
+    write(format(" "))
+    flush()
+    local answer=read()
+    answer=gsub(answer,"^%s*(.*)%s*$","%1")
+    if answer=="" and default then
+      return default
+    elseif not options then
+      return answer
+    else
+      for k=1,#options do
+        if options[k]==answer then
+          return answer
+        end
+      end
+      local pattern="^"..answer
+      for k=1,#options do
+        local v=options[k]
+        if find(v,pattern) then
+          return v
+        end
+      end
+    end
+  end
+end
+local function readnumber(f,n,m) 
+  if m then
+    f:seek("set",n)
+    n=m
+  end
+  if n==1 then
+    return byte(f:read(1))
+  elseif n==2 then
+    local a,b=byte(f:read(2),1,2)
+    return 0x100*a+b
+  elseif n==3 then
+    local a,b,c=byte(f:read(3),1,3)
+    return 0x10000*a+0x100*b+c
+  elseif n==4 then
+    local a,b,c,d=byte(f:read(4),1,4)
+    return 0x1000000*a+0x10000*b+0x100*c+d
+  elseif n==8 then
+    local a,b=readnumber(f,4),readnumber(f,4)
+    return 0x100*a+b
+  elseif n==12 then
+    local a,b,c=readnumber(f,4),readnumber(f,4),readnumber(f,4)
+    return 0x10000*a+0x100*b+c
+  elseif n==-2 then
+    local b,a=byte(f:read(2),1,2)
+    return 0x100*a+b
+  elseif n==-3 then
+    local c,b,a=byte(f:read(3),1,3)
+    return 0x10000*a+0x100*b+c
+  elseif n==-4 then
+    local d,c,b,a=byte(f:read(4),1,4)
+    return 0x1000000*a+0x10000*b+0x100*c+d
+  elseif n==-8 then
+    local h,g,f,e,d,c,b,a=byte(f:read(8),1,8)
+    return 0x100000000000000*a+0x1000000000000*b+0x10000000000*c+0x100000000*d+0x1000000*e+0x10000*f+0x100*g+h
+  else
+    return 0
+  end
+end
+io.readnumber=readnumber
+function io.readstring(f,n,m)
+  if m then
+    f:seek("set",n)
+    n=m
+  end
+  local str=gsub(f:read(n),"\000","")
+  return str
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['l-file']={
+  version=1.001,
+  comment="companion to luat-lib.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+file=file or {}
+local file=file
+if not lfs then
+  lfs=optionalrequire("lfs")
+end
+local insert,concat=table.insert,table.concat
+local match,find,gmatch=string.match,string.find,string.gmatch
+local lpegmatch=lpeg.match
+local getcurrentdir,attributes=lfs.currentdir,lfs.attributes
+local checkedsplit=string.checkedsplit
+local P,R,S,C,Cs,Cp,Cc,Ct=lpeg.P,lpeg.R,lpeg.S,lpeg.C,lpeg.Cs,lpeg.Cp,lpeg.Cc,lpeg.Ct
+local tricky=S("/\\")*P(-1)
+local attributes=lfs.attributes
+if sandbox then
+  sandbox.redefine(lfs.isfile,"lfs.isfile")
+  sandbox.redefine(lfs.isdir,"lfs.isdir")
+end
+function lfs.isdir(name)
+  if lpegmatch(tricky,name) then
+    return attributes(name,"mode")=="directory"
+  else
+    return attributes(name.."/.","mode")=="directory"
+  end
+end
+function lfs.isfile(name)
+  return attributes(name,"mode")=="file"
+end
+local colon=P(":")
+local period=P(".")
+local periods=P("..")
+local fwslash=P("/")
+local bwslash=P("\\")
+local slashes=S("\\/")
+local noperiod=1-period
+local noslashes=1-slashes
+local name=noperiod^1
+local suffix=period/""*(1-period-slashes)^1*-1
+local pattern=C((1-(slashes^1*noslashes^1*-1))^1)*P(1) 
+local function pathpart(name,default)
+  return name and lpegmatch(pattern,name) or default or ""
+end
+local pattern=(noslashes^0*slashes)^1*C(noslashes^1)*-1
+local function basename(name)
+  return name and lpegmatch(pattern,name) or name
+end
+local pattern=(noslashes^0*slashes^1)^0*Cs((1-suffix)^1)*suffix^0
+local function nameonly(name)
+  return name and lpegmatch(pattern,name) or name
+end
+local pattern=(noslashes^0*slashes)^0*(noperiod^1*period)^1*C(noperiod^1)*-1
+local function suffixonly(name)
+  return name and lpegmatch(pattern,name) or ""
+end
+local pattern=(noslashes^0*slashes)^0*noperiod^1*((period*C(noperiod^1))^1)*-1+Cc("")
+local function suffixesonly(name)
+  if name then
+    return lpegmatch(pattern,name)
+  else
+    return ""
+  end
+end
+file.pathpart=pathpart
+file.basename=basename
+file.nameonly=nameonly
+file.suffixonly=suffixonly
+file.suffix=suffixonly
+file.suffixesonly=suffixesonly
+file.suffixes=suffixesonly
+file.dirname=pathpart  
+file.extname=suffixonly
+local drive=C(R("az","AZ"))*colon
+local path=C((noslashes^0*slashes)^0)
+local suffix=period*C(P(1-period)^0*P(-1))
+local base=C((1-suffix)^0)
+local rest=C(P(1)^0)
+drive=drive+Cc("")
+path=path+Cc("")
+base=base+Cc("")
+suffix=suffix+Cc("")
+local pattern_a=drive*path*base*suffix
+local pattern_b=path*base*suffix
+local pattern_c=C(drive*path)*C(base*suffix) 
+local pattern_d=path*rest
+function file.splitname(str,splitdrive)
+  if not str then
+  elseif splitdrive then
+    return lpegmatch(pattern_a,str) 
+  else
+    return lpegmatch(pattern_b,str) 
+  end
+end
+function file.splitbase(str)
+  if str then
+    return lpegmatch(pattern_d,str) 
+  else
+    return "",str 
+  end
+end
+function file.nametotable(str,splitdrive)
+  if str then
+    local path,drive,subpath,name,base,suffix=lpegmatch(pattern_c,str)
+    if splitdrive then
+      return {
+        path=path,
+        drive=drive,
+        subpath=subpath,
+        name=name,
+        base=base,
+        suffix=suffix,
+      }
+    else
+      return {
+        path=path,
+        name=name,
+        base=base,
+        suffix=suffix,
+      }
+    end
+  end
+end
+local pattern=Cs(((period*(1-period-slashes)^1*-1)/""+1)^1)
+function file.removesuffix(name)
+  return name and lpegmatch(pattern,name)
+end
+local suffix=period/""*(1-period-slashes)^1*-1
+local pattern=Cs((noslashes^0*slashes^1)^0*((1-suffix)^1))*Cs(suffix)
+function file.addsuffix(filename,suffix,criterium)
+  if not filename or not suffix or suffix=="" then
+    return filename
+  elseif criterium==true then
+    return filename.."."..suffix
+  elseif not criterium then
+    local n,s=lpegmatch(pattern,filename)
+    if not s or s=="" then
+      return filename.."."..suffix
+    else
+      return filename
+    end
+  else
+    local n,s=lpegmatch(pattern,filename)
+    if s and s~="" then
+      local t=type(criterium)
+      if t=="table" then
+        for i=1,#criterium do
+          if s==criterium[i] then
+            return filename
+          end
+        end
+      elseif t=="string" then
+        if s==criterium then
+          return filename
+        end
+      end
+    end
+    return (n or filename).."."..suffix
+  end
+end
+local suffix=period*(1-period-slashes)^1*-1
+local pattern=Cs((1-suffix)^0)
+function file.replacesuffix(name,suffix)
+  if name and suffix and suffix~="" then
+    return lpegmatch(pattern,name).."."..suffix
+  else
+    return name
+  end
+end
+local reslasher=lpeg.replacer(P("\\"),"/")
+function file.reslash(str)
+  return str and lpegmatch(reslasher,str)
+end
+function file.is_writable(name)
+  if not name then
+  elseif lfs.isdir(name) then
+    name=name.."/m_t_x_t_e_s_t.tmp"
+    local f=io.open(name,"wb")
+    if f then
+      f:close()
+      os.remove(name)
+      return true
+    end
+  elseif lfs.isfile(name) then
+    local f=io.open(name,"ab")
+    if f then
+      f:close()
+      return true
+    end
+  else
+    local f=io.open(name,"ab")
+    if f then
+      f:close()
+      os.remove(name)
+      return true
+    end
+  end
+  return false
+end
+local readable=P("r")*Cc(true)
+function file.is_readable(name)
+  if name then
+    local a=attributes(name)
+    return a and lpegmatch(readable,a.permissions) or false
+  else
+    return false
+  end
+end
+file.isreadable=file.is_readable 
+file.iswritable=file.is_writable 
+function file.size(name)
+  if name then
+    local a=attributes(name)
+    return a and a.size or 0
+  else
+    return 0
+  end
+end
+function file.splitpath(str,separator) 
+  return str and checkedsplit(lpegmatch(reslasher,str),separator or io.pathseparator)
+end
+function file.joinpath(tab,separator) 
+  return tab and concat(tab,separator or io.pathseparator) 
+end
+local someslash=S("\\/")
+local stripper=Cs(P(fwslash)^0/""*reslasher)
+local isnetwork=someslash*someslash*(1-someslash)+(1-fwslash-colon)^1*colon
+local isroot=fwslash^1*-1
+local hasroot=fwslash^1
+local reslasher=lpeg.replacer(S("\\/"),"/")
+local deslasher=lpeg.replacer(S("\\/")^1,"/")
+function file.join(one,two,three,...)
+  if not two then
+    return one=="" and one or lpegmatch(reslasher,one)
+  end
+  if one=="" then
+    return lpegmatch(stripper,three and concat({ two,three,... },"/") or two)
+  end
+  if lpegmatch(isnetwork,one) then
+    local one=lpegmatch(reslasher,one)
+    local two=lpegmatch(deslasher,three and concat({ two,three,... },"/") or two)
+    if lpegmatch(hasroot,two) then
+      return one..two
+    else
+      return one.."/"..two
+    end
+  elseif lpegmatch(isroot,one) then
+    local two=lpegmatch(deslasher,three and concat({ two,three,... },"/") or two)
+    if lpegmatch(hasroot,two) then
+      return two
+    else
+      return "/"..two
+    end
+  else
+    return lpegmatch(deslasher,concat({ one,two,three,... },"/"))
+  end
+end
+local drivespec=R("az","AZ")^1*colon
+local anchors=fwslash+drivespec
+local untouched=periods+(1-period)^1*P(-1)
+local mswindrive=Cs(drivespec*(bwslash/"/"+fwslash)^0)
+local mswinuncpath=(bwslash+fwslash)*(bwslash+fwslash)*Cc("//")
+local splitstarter=(mswindrive+mswinuncpath+Cc(false))*Ct(lpeg.splitat(S("/\\")^1))
+local absolute=fwslash
+function file.collapsepath(str,anchor) 
+  if not str then
+    return
+  end
+  if anchor==true and not lpegmatch(anchors,str) then
+    str=getcurrentdir().."/"..str
+  end
+  if str=="" or str=="." then
+    return "."
+  elseif lpegmatch(untouched,str) then
+    return lpegmatch(reslasher,str)
+  end
+  local starter,oldelements=lpegmatch(splitstarter,str)
+  local newelements={}
+  local i=#oldelements
+  while i>0 do
+    local element=oldelements[i]
+    if element=='.' then
+    elseif element=='..' then
+      local n=i-1
+      while n>0 do
+        local element=oldelements[n]
+        if element~='..' and element~='.' then
+          oldelements[n]='.'
+          break
+        else
+          n=n-1
+        end
+       end
+      if n<1 then
+        insert(newelements,1,'..')
+      end
+    elseif element~="" then
+      insert(newelements,1,element)
+    end
+    i=i-1
+  end
+  if #newelements==0 then
+    return starter or "."
+  elseif starter then
+    return starter..concat(newelements,'/')
+  elseif lpegmatch(absolute,str) then
+    return "/"..concat(newelements,'/')
+  else
+    newelements=concat(newelements,'/')
+    if anchor=="." and find(str,"^%./") then
+      return "./"..newelements
+    else
+      return newelements
+    end
+  end
+end
+local validchars=R("az","09","AZ","--","..")
+local pattern_a=lpeg.replacer(1-validchars)
+local pattern_a=Cs((validchars+P(1)/"-")^1)
+local whatever=P("-")^0/""
+local pattern_b=Cs(whatever*(1-whatever*-1)^1)
+function file.robustname(str,strict)
+  if str then
+    str=lpegmatch(pattern_a,str) or str
+    if strict then
+      return lpegmatch(pattern_b,str) or str 
+    else
+      return str
+    end
+  end
+end
+local loaddata=io.loaddata
+local savedata=io.savedata
+file.readdata=loaddata
+file.savedata=savedata
+function file.copy(oldname,newname)
+  if oldname and newname then
+    local data=loaddata(oldname)
+    if data and data~="" then
+      savedata(newname,data)
+    end
+  end
+end
+local letter=R("az","AZ")+S("_-+")
+local separator=P("://")
+local qualified=period^0*fwslash+letter*colon+letter^1*separator+letter^1*fwslash
+local rootbased=fwslash+letter*colon
+lpeg.patterns.qualified=qualified
+lpeg.patterns.rootbased=rootbased
+function file.is_qualified_path(filename)
+  return filename and lpegmatch(qualified,filename)~=nil
+end
+function file.is_rootbased_path(filename)
+  return filename and lpegmatch(rootbased,filename)~=nil
+end
+function file.strip(name,dir)
+  if name then
+    local b,a=match(name,"^(.-)"..dir.."(.*)$")
+    return a~="" and a or name
+  end
+end
+function lfs.mkdirs(path)
+  local full=""
+  for sub in gmatch(path,"(/*[^\\/]+)") do 
+    full=full..sub
+    lfs.mkdir(full)
+  end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['l-boolean']={
+  version=1.001,
+  comment="companion to luat-lib.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local type,tonumber=type,tonumber
+boolean=boolean or {}
+local boolean=boolean
+function boolean.tonumber(b)
+  if b then return 1 else return 0 end 
+end
+function toboolean(str,tolerant) 
+  if str==nil then
+    return false
+  elseif str==false then
+    return false
+  elseif str==true then
+    return true
+  elseif str=="true" then
+    return true
+  elseif str=="false" then
+    return false
+  elseif not tolerant then
+    return false
+  elseif str==0 then
+    return false
+  elseif (tonumber(str) or 0)>0 then
+    return true
+  else
+    return str=="yes" or str=="on" or str=="t"
+  end
+end
+string.toboolean=toboolean
+function string.booleanstring(str)
+  if str=="0" then
+    return false
+  elseif str=="1" then
+    return true
+  elseif str=="" then
+    return false
+  elseif str=="false" then
+    return false
+  elseif str=="true" then
+    return true
+  elseif (tonumber(str) or 0)>0 then
+    return true
+  else
+    return str=="yes" or str=="on" or str=="t"
+  end
+end
+function string.is_boolean(str,default,strict)
+  if type(str)=="string" then
+    if str=="true" or str=="yes" or str=="on" or str=="t" or (not strict and str=="1") then
+      return true
+    elseif str=="false" or str=="no" or str=="off" or str=="f" or (not strict and str=="0") then
+      return false
+    end
+  end
+  return default
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['l-math']={
+  version=1.001,
+  comment="companion to luat-lib.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local floor,sin,cos,tan=math.floor,math.sin,math.cos,math.tan
+if not math.ceiling then
+  math.ceiling=math.ceil
+end
+if not math.round then
+  function math.round(x) return floor(x+0.5) end
+end
+if not math.div then
+  function math.div(n,m) return floor(n/m) end
+end
+if not math.mod then
+  function math.mod(n,m) return n%m end
+end
+local pipi=2*math.pi/360
+if not math.sind then
+  function math.sind(d) return sin(d*pipi) end
+  function math.cosd(d) return cos(d*pipi) end
+  function math.tand(d) return tan(d*pipi) end
+end
+if not math.odd then
+  function math.odd (n) return n%2~=0 end
+  function math.even(n) return n%2==0 end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['l-unicode']={
+  version=1.001,
+  comment="companion to luat-lib.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+utf=utf or (unicode and unicode.utf8) or {}
+utf.characters=utf.characters or string.utfcharacters
+utf.values=utf.values   or string.utfvalues
+local type=type
+local char,byte,format,sub,gmatch=string.char,string.byte,string.format,string.sub,string.gmatch
+local concat=table.concat
+local P,C,R,Cs,Ct,Cmt,Cc,Carg,Cp=lpeg.P,lpeg.C,lpeg.R,lpeg.Cs,lpeg.Ct,lpeg.Cmt,lpeg.Cc,lpeg.Carg,lpeg.Cp
+local lpegmatch=lpeg.match
+local patterns=lpeg.patterns
+local tabletopattern=lpeg.utfchartabletopattern
+local bytepairs=string.bytepairs
+local finder=lpeg.finder
+local replacer=lpeg.replacer
+local utfvalues=utf.values
+local utfgmatch=utf.gmatch 
+local p_utftype=patterns.utftype
+local p_utfstricttype=patterns.utfstricttype
+local p_utfoffset=patterns.utfoffset
+local p_utf8char=patterns.utf8character
+local p_utf8byte=patterns.utf8byte
+local p_utfbom=patterns.utfbom
+local p_newline=patterns.newline
+local p_whitespace=patterns.whitespace
+if not unicode then
+  unicode={ utf=utf } 
+end
+if not utf.char then
+  local floor,char=math.floor,string.char
+  function utf.char(n)
+    if n<0x80 then
+      return char(n)
+    elseif n<0x800 then
+      return char(
+        0xC0+floor(n/0x40),
+        0x80+(n%0x40)
+      )
+    elseif n<0x10000 then
+      return char(
+        0xE0+floor(n/0x1000),
+        0x80+(floor(n/0x40)%0x40),
+        0x80+(n%0x40)
+      )
+    elseif n<0x200000 then
+      return char(
+        0xF0+floor(n/0x40000),
+        0x80+(floor(n/0x1000)%0x40),
+        0x80+(floor(n/0x40)%0x40),
+        0x80+(n%0x40)
+      )
+    else
+      return ""
+    end
+  end
+end
+if not utf.byte then
+  local utf8byte=patterns.utf8byte
+  function utf.byte(c)
+    return lpegmatch(utf8byte,c)
+  end
+end
+local utfchar,utfbyte=utf.char,utf.byte
+function utf.filetype(data)
+  return data and lpegmatch(p_utftype,data) or "unknown"
+end
+local toentities=Cs (
+  (
+    patterns.utf8one+(
+        patterns.utf8two+patterns.utf8three+patterns.utf8four
+      )/function(s) local b=utfbyte(s) if b<127 then return s else return format("&#%X;",b) end end
+  )^0
+)
+patterns.toentities=toentities
+function utf.toentities(str)
+  return lpegmatch(toentities,str)
+end
+local one=P(1)
+local two=C(1)*C(1)
+local four=C(R(utfchar(0xD8),utfchar(0xFF)))*C(1)*C(1)*C(1)
+local pattern=P("\254\255")*Cs((
+          four/function(a,b,c,d)
+                local ab=0xFF*byte(a)+byte(b)
+                local cd=0xFF*byte(c)+byte(d)
+                return utfchar((ab-0xD800)*0x400+(cd-0xDC00)+0x10000)
+              end+two/function(a,b)
+                return utfchar(byte(a)*256+byte(b))
+              end+one
+        )^1 )+P("\255\254")*Cs((
+          four/function(b,a,d,c)
+                local ab=0xFF*byte(a)+byte(b)
+                local cd=0xFF*byte(c)+byte(d)
+                return utfchar((ab-0xD800)*0x400+(cd-0xDC00)+0x10000)
+              end+two/function(b,a)
+                return utfchar(byte(a)*256+byte(b))
+              end+one
+        )^1 )
+function string.toutf(s) 
+  return lpegmatch(pattern,s) or s 
+end
+local validatedutf=Cs (
+  (
+    patterns.utf8one+patterns.utf8two+patterns.utf8three+patterns.utf8four+P(1)/"�"
+  )^0
+)
+patterns.validatedutf=validatedutf
+function utf.is_valid(str)
+  return type(str)=="string" and lpegmatch(validatedutf,str) or false
+end
+if not utf.len then
+  local n,f=0,1
+  local utfcharcounter=patterns.utfbom^-1*Cmt (
+    Cc(1)*patterns.utf8one^1+Cc(2)*patterns.utf8two^1+Cc(3)*patterns.utf8three^1+Cc(4)*patterns.utf8four^1,
+    function(_,t,d) 
+      n=n+(t-f)/d
+      f=t
+      return true
+    end
+  )^0
+  function utf.len(str)
+    n,f=0,1
+    lpegmatch(utfcharcounter,str or "")
+    return n
+  end
+end
+utf.length=utf.len
+if not utf.sub then
+  local utflength=utf.length
+  local b,e,n,first,last=0,0,0,0,0
+  local function slide_zero(s,p)
+    n=n+1
+    if n>=last then
+      e=p-1
+    else
+      return p
+    end
+  end
+  local function slide_one(s,p)
+    n=n+1
+    if n==first then
+      b=p
+    end
+    if n>=last then
+      e=p-1
+    else
+      return p
+    end
+  end
+  local function slide_two(s,p)
+    n=n+1
+    if n==first then
+      b=p
+    else
+      return true
+    end
+  end
+  local pattern_zero=Cmt(p_utf8char,slide_zero)^0
+  local pattern_one=Cmt(p_utf8char,slide_one )^0
+  local pattern_two=Cmt(p_utf8char,slide_two )^0
+  local pattern_first=C(patterns.utf8character)
+  function utf.sub(str,start,stop)
+    if not start then
+      return str
+    end
+    if start==0 then
+      start=1
+    end
+    if not stop then
+      if start<0 then
+        local l=utflength(str) 
+        start=l+start
+      else
+        start=start-1
+      end
+      b,n,first=0,0,start
+      lpegmatch(pattern_two,str)
+      if n>=first then
+        return sub(str,b)
+      else
+        return ""
+      end
+    end
+    if start<0 or stop<0 then
+      local l=utf.length(str)
+      if start<0 then
+        start=l+start
+        if start<=0 then
+          start=1
+        else
+          start=start+1
+        end
+      end
+      if stop<0 then
+        stop=l+stop
+        if stop==0 then
+          stop=1
+        else
+          stop=stop+1
+        end
+      end
+    end
+    if start==1 and stop==1 then
+      return lpegmatch(pattern_first,str) or ""
+    elseif start>stop then
+      return ""
+    elseif start>1 then
+      b,e,n,first,last=0,0,0,start-1,stop
+      lpegmatch(pattern_one,str)
+      if n>=first and e==0 then
+        e=#str
+      end
+      return sub(str,b,e)
+    else
+      b,e,n,last=1,0,0,stop
+      lpegmatch(pattern_zero,str)
+      if e==0 then
+        e=#str
+      end
+      return sub(str,b,e)
+    end
+  end
+end
+function utf.remapper(mapping,option,action) 
+  local variant=type(mapping)
+  if variant=="table" then
+    action=action or mapping
+    if option=="dynamic" then
+      local pattern=false
+      table.setmetatablenewindex(mapping,function(t,k,v) rawset(t,k,v) pattern=false end)
+      return function(str)
+        if not str or str=="" then
+          return ""
+        else
+          if not pattern then
+            pattern=Cs((tabletopattern(mapping)/action+p_utf8char)^0)
+          end
+          return lpegmatch(pattern,str)
+        end
+      end
+    elseif option=="pattern" then
+      return Cs((tabletopattern(mapping)/action+p_utf8char)^0)
+    else
+      local pattern=Cs((tabletopattern(mapping)/action+p_utf8char)^0)
+      return function(str)
+        if not str or str=="" then
+          return ""
+        else
+          return lpegmatch(pattern,str)
+        end
+      end,pattern
+    end
+  elseif variant=="function" then
+    if option=="pattern" then
+      return Cs((p_utf8char/mapping+p_utf8char)^0)
+    else
+      local pattern=Cs((p_utf8char/mapping+p_utf8char)^0)
+      return function(str)
+        if not str or str=="" then
+          return ""
+        else
+          return lpegmatch(pattern,str)
+        end
+      end,pattern
+    end
+  else
+    return function(str)
+      return str or ""
+    end
+  end
+end
+function utf.replacer(t) 
+  local r=replacer(t,false,false,true)
+  return function(str)
+    return lpegmatch(r,str)
+  end
+end
+function utf.subtituter(t) 
+  local f=finder (t)
+  local r=replacer(t,false,false,true)
+  return function(str)
+    local i=lpegmatch(f,str)
+    if not i then
+      return str
+    elseif i>#str then
+      return str
+    else
+      return lpegmatch(r,str)
+    end
+  end
+end
+local utflinesplitter=p_utfbom^-1*lpeg.tsplitat(p_newline)
+local utfcharsplitter_ows=p_utfbom^-1*Ct(C(p_utf8char)^0)
+local utfcharsplitter_iws=p_utfbom^-1*Ct((p_whitespace^1+C(p_utf8char))^0)
+local utfcharsplitter_raw=Ct(C(p_utf8char)^0)
+patterns.utflinesplitter=utflinesplitter
+function utf.splitlines(str)
+  return lpegmatch(utflinesplitter,str or "")
+end
+function utf.split(str,ignorewhitespace) 
+  if ignorewhitespace then
+    return lpegmatch(utfcharsplitter_iws,str or "")
+  else
+    return lpegmatch(utfcharsplitter_ows,str or "")
+  end
+end
+function utf.totable(str) 
+  return lpegmatch(utfcharsplitter_raw,str)
+end
+function utf.magic(f) 
+  local str=f:read(4) or ""
+  local off=lpegmatch(p_utfoffset,str)
+  if off<4 then
+    f:seek('set',off)
+  end
+  return lpegmatch(p_utftype,str)
+end
+local utf16_to_utf8_be,utf16_to_utf8_le
+local utf32_to_utf8_be,utf32_to_utf8_le
+local utf_16_be_getbom=patterns.utfbom_16_be^-1
+local utf_16_le_getbom=patterns.utfbom_16_le^-1
+local utf_32_be_getbom=patterns.utfbom_32_be^-1
+local utf_32_le_getbom=patterns.utfbom_32_le^-1
+local utf_16_be_linesplitter=utf_16_be_getbom*lpeg.tsplitat(patterns.utf_16_be_nl)
+local utf_16_le_linesplitter=utf_16_le_getbom*lpeg.tsplitat(patterns.utf_16_le_nl)
+local utf_32_be_linesplitter=utf_32_be_getbom*lpeg.tsplitat(patterns.utf_32_be_nl)
+local utf_32_le_linesplitter=utf_32_le_getbom*lpeg.tsplitat(patterns.utf_32_le_nl)
+local more=0
+local p_utf16_to_utf8_be=C(1)*C(1)/function(left,right)
+  local now=256*byte(left)+byte(right)
+  if more>0 then
+    now=(more-0xD800)*0x400+(now-0xDC00)+0x10000 
+    more=0
+    return utfchar(now)
+  elseif now>=0xD800 and now<=0xDBFF then
+    more=now
+    return "" 
+  else
+    return utfchar(now)
+  end
+end
+local p_utf16_to_utf8_le=C(1)*C(1)/function(right,left)
+  local now=256*byte(left)+byte(right)
+  if more>0 then
+    now=(more-0xD800)*0x400+(now-0xDC00)+0x10000 
+    more=0
+    return utfchar(now)
+  elseif now>=0xD800 and now<=0xDBFF then
+    more=now
+    return "" 
+  else
+    return utfchar(now)
+  end
+end
+local p_utf32_to_utf8_be=C(1)*C(1)*C(1)*C(1)/function(a,b,c,d)
+  return utfchar(256*256*256*byte(a)+256*256*byte(b)+256*byte(c)+byte(d))
+end
+local p_utf32_to_utf8_le=C(1)*C(1)*C(1)*C(1)/function(a,b,c,d)
+  return utfchar(256*256*256*byte(d)+256*256*byte(c)+256*byte(b)+byte(a))
+end
+p_utf16_to_utf8_be=P(true)/function() more=0 end*utf_16_be_getbom*Cs(p_utf16_to_utf8_be^0)
+p_utf16_to_utf8_le=P(true)/function() more=0 end*utf_16_le_getbom*Cs(p_utf16_to_utf8_le^0)
+p_utf32_to_utf8_be=P(true)/function() more=0 end*utf_32_be_getbom*Cs(p_utf32_to_utf8_be^0)
+p_utf32_to_utf8_le=P(true)/function() more=0 end*utf_32_le_getbom*Cs(p_utf32_to_utf8_le^0)
+patterns.utf16_to_utf8_be=p_utf16_to_utf8_be
+patterns.utf16_to_utf8_le=p_utf16_to_utf8_le
+patterns.utf32_to_utf8_be=p_utf32_to_utf8_be
+patterns.utf32_to_utf8_le=p_utf32_to_utf8_le
+utf16_to_utf8_be=function(s)
+  if s and s~="" then
+    return lpegmatch(p_utf16_to_utf8_be,s)
+  else
+    return s
+  end
+end
+local utf16_to_utf8_be_t=function(t)
+  if not t then
+    return nil
+  elseif type(t)=="string" then
+    t=lpegmatch(utf_16_be_linesplitter,t)
+  end
+  for i=1,#t do
+    local s=t[i]
+    if s~="" then
+      t[i]=lpegmatch(p_utf16_to_utf8_be,s)
+    end
+  end
+  return t
+end
+utf16_to_utf8_le=function(s)
+  if s and s~="" then
+    return lpegmatch(p_utf16_to_utf8_le,s)
+  else
+    return s
+  end
+end
+local utf16_to_utf8_le_t=function(t)
+  if not t then
+    return nil
+  elseif type(t)=="string" then
+    t=lpegmatch(utf_16_le_linesplitter,t)
+  end
+  for i=1,#t do
+    local s=t[i]
+    if s~="" then
+      t[i]=lpegmatch(p_utf16_to_utf8_le,s)
+    end
+  end
+  return t
+end
+utf32_to_utf8_be=function(s)
+  if s and s~="" then
+    return lpegmatch(p_utf32_to_utf8_be,s)
+  else
+    return s
+  end
+end
+local utf32_to_utf8_be_t=function(t)
+  if not t then
+    return nil
+  elseif type(t)=="string" then
+    t=lpegmatch(utf_32_be_linesplitter,t)
+  end
+  for i=1,#t do
+    local s=t[i]
+    if s~="" then
+      t[i]=lpegmatch(p_utf32_to_utf8_be,s)
+    end
+  end
+  return t
+end
+utf32_to_utf8_le=function(s)
+  if s and s~="" then
+    return lpegmatch(p_utf32_to_utf8_le,s)
+  else
+    return s
+  end
+end
+local utf32_to_utf8_le_t=function(t)
+  if not t then
+    return nil
+  elseif type(t)=="string" then
+    t=lpegmatch(utf_32_le_linesplitter,t)
+  end
+  for i=1,#t do
+    local s=t[i]
+    if s~="" then
+      t[i]=lpegmatch(p_utf32_to_utf8_le,s)
+    end
+  end
+  return t
+end
+utf.utf16_to_utf8_le_t=utf16_to_utf8_le_t
+utf.utf16_to_utf8_be_t=utf16_to_utf8_be_t
+utf.utf32_to_utf8_le_t=utf32_to_utf8_le_t
+utf.utf32_to_utf8_be_t=utf32_to_utf8_be_t
+utf.utf16_to_utf8_le=utf16_to_utf8_le
+utf.utf16_to_utf8_be=utf16_to_utf8_be
+utf.utf32_to_utf8_le=utf32_to_utf8_le
+utf.utf32_to_utf8_be=utf32_to_utf8_be
+function utf.utf8_to_utf8_t(t)
+  return type(t)=="string" and lpegmatch(utflinesplitter,t) or t
+end
+function utf.utf16_to_utf8_t(t,endian)
+  return endian and utf16_to_utf8_be_t(t) or utf16_to_utf8_le_t(t) or t
+end
+function utf.utf32_to_utf8_t(t,endian)
+  return endian and utf32_to_utf8_be_t(t) or utf32_to_utf8_le_t(t) or t
+end
+local function little(b)
+  if b<0x10000 then
+    return char(b%256,b/256)
+  else
+    b=b-0x10000
+    local b1,b2=b/1024+0xD800,b%1024+0xDC00
+    return char(b1%256,b1/256,b2%256,b2/256)
+  end
+end
+local function big(b)
+  if b<0x10000 then
+    return char(b/256,b%256)
+  else
+    b=b-0x10000
+    local b1,b2=b/1024+0xD800,b%1024+0xDC00
+    return char(b1/256,b1%256,b2/256,b2%256)
+  end
+end
+local l_remap=Cs((p_utf8byte/little+P(1)/"")^0)
+local b_remap=Cs((p_utf8byte/big+P(1)/"")^0)
+local function utf8_to_utf16_be(str,nobom)
+  if nobom then
+    return lpegmatch(b_remap,str)
+  else
+    return char(254,255)..lpegmatch(b_remap,str)
+  end
+end
+local function utf8_to_utf16_le(str,nobom)
+  if nobom then
+    return lpegmatch(l_remap,str)
+  else
+    return char(255,254)..lpegmatch(l_remap,str)
+  end
+end
+utf.utf8_to_utf16_be=utf8_to_utf16_be
+utf.utf8_to_utf16_le=utf8_to_utf16_le
+function utf.utf8_to_utf16(str,littleendian,nobom)
+  if littleendian then
+    return utf8_to_utf16_le(str,nobom)
+  else
+    return utf8_to_utf16_be(str,nobom)
+  end
+end
+local pattern=Cs (
+  (p_utf8byte/function(unicode     ) return format("0x%04X",unicode) end)*(p_utf8byte*Carg(1)/function(unicode,separator) return format("%s0x%04X",separator,unicode) end)^0
+)
+function utf.tocodes(str,separator)
+  return lpegmatch(pattern,str,1,separator or " ")
+end
+function utf.ustring(s)
+  return format("U+%05X",type(s)=="number" and s or utfbyte(s))
+end
+function utf.xstring(s)
+  return format("0x%05X",type(s)=="number" and s or utfbyte(s))
+end
+function utf.toeight(str)
+  if not str or str=="" then
+    return nil
+  end
+  local utftype=lpegmatch(p_utfstricttype,str)
+  if utftype=="utf-8" then
+    return sub(str,4)        
+  elseif utftype=="utf-16-be" then
+    return utf16_to_utf8_be(str)  
+  elseif utftype=="utf-16-le" then
+    return utf16_to_utf8_le(str)  
+  else
+    return str
+  end
+end
+local p_nany=p_utf8char/""
+if utfgmatch then
+  function utf.count(str,what)
+    if type(what)=="string" then
+      local n=0
+      for _ in utfgmatch(str,what) do
+        n=n+1
+      end
+      return n
+    else 
+      return #lpegmatch(Cs((P(what)/" "+p_nany)^0),str)
+    end
+  end
+else
+  local cache={}
+  function utf.count(str,what)
+    if type(what)=="string" then
+      local p=cache[what]
+      if not p then
+        p=Cs((P(what)/" "+p_nany)^0)
+        cache[p]=p
+      end
+      return #lpegmatch(p,str)
+    else 
+      return #lpegmatch(Cs((P(what)/" "+p_nany)^0),str)
+    end
+  end
+end
+if not utf.characters then
+  function utf.characters(str)
+    return gmatch(str,".[\128-\191]*")
+  end
+  string.utfcharacters=utf.characters
+end
+if not utf.values then
+  local find=string.find
+  local dummy=function()
+  end
+  function utf.values(str)
+    local n=#str
+    if n==0 then
+      return dummy
+    elseif n==1 then
+      return function() return utfbyte(str) end
+    else
+      local p=1
+      return function()
+          local b,e=find(str,".[\128-\191]*",p)
+          if b then
+            p=e+1
+            return utfbyte(sub(str,b,e))
+          end
+      end
+    end
+  end
+  string.utfvalues=utf.values
+end
+function utf.chrlen(u) 
+  return
+    (u<0x80 and 1) or
+    (u<0xE0 and 2) or
+    (u<0xF0 and 3) or
+    (u<0xF8 and 4) or
+    (u<0xFC and 5) or
+    (u<0xFE and 6) or 0
+end
+local extract=bit32.extract
+local char=string.char
+function unicode.toutf32string(n)
+  if n<=0xFF then
+    return
+      char(n).."\000\000\000"
+  elseif n<=0xFFFF then
+    return
+      char(extract(n,0,8))..char(extract(n,8,8)).."\000\000"
+  elseif n<=0xFFFFFF then
+    return
+      char(extract(n,0,8))..char(extract(n,8,8))..char(extract(n,16,8)).."\000"
+  else
+    return
+      char(extract(n,0,8))..char(extract(n,8,8))..char(extract(n,16,8))..char(extract(n,24,8))
+  end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['util-str']={
+  version=1.001,
+  comment="companion to luat-lib.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+utilities=utilities or {}
+utilities.strings=utilities.strings or {}
+local strings=utilities.strings
+local format,gsub,rep,sub,find=string.format,string.gsub,string.rep,string.sub,string.find
+local load,dump=load,string.dump
+local tonumber,type,tostring=tonumber,type,tostring
+local unpack,concat=table.unpack,table.concat
+local P,V,C,S,R,Ct,Cs,Cp,Carg,Cc=lpeg.P,lpeg.V,lpeg.C,lpeg.S,lpeg.R,lpeg.Ct,lpeg.Cs,lpeg.Cp,lpeg.Carg,lpeg.Cc
+local patterns,lpegmatch=lpeg.patterns,lpeg.match
+local utfchar,utfbyte=utf.char,utf.byte
+local loadstripped=nil
+if _LUAVERSION<5.2 then
+  loadstripped=function(str,shortcuts)
+    return load(str)
+  end
+else
+  loadstripped=function(str,shortcuts)
+    if shortcuts then
+      return load(dump(load(str),true),nil,nil,shortcuts)
+    else
+      return load(dump(load(str),true))
+    end
+  end
+end
+if not number then number={} end 
+local stripper=patterns.stripzeros
+local newline=patterns.newline
+local endofstring=patterns.endofstring
+local whitespace=patterns.whitespace
+local spacer=patterns.spacer
+local spaceortab=patterns.spaceortab
+local function points(n)
+  n=tonumber(n)
+  return (not n or n==0) and "0pt" or lpegmatch(stripper,format("%.5fpt",n/65536))
+end
+local function basepoints(n)
+  n=tonumber(n)
+  return (not n or n==0) and "0bp" or lpegmatch(stripper,format("%.5fbp",n*(7200/7227)/65536))
+end
+number.points=points
+number.basepoints=basepoints
+local rubish=spaceortab^0*newline
+local anyrubish=spaceortab+newline
+local anything=patterns.anything
+local stripped=(spaceortab^1/"")*newline
+local leading=rubish^0/""
+local trailing=(anyrubish^1*endofstring)/""
+local redundant=rubish^3/"\n"
+local pattern=Cs(leading*(trailing+redundant+stripped+anything)^0)
+function strings.collapsecrlf(str)
+  return lpegmatch(pattern,str)
+end
+local repeaters={} 
+function strings.newrepeater(str,offset)
+  offset=offset or 0
+  local s=repeaters[str]
+  if not s then
+    s={}
+    repeaters[str]=s
+  end
+  local t=s[offset]
+  if t then
+    return t
+  end
+  t={}
+  setmetatable(t,{ __index=function(t,k)
+    if not k then
+      return ""
+    end
+    local n=k+offset
+    local s=n>0 and rep(str,n) or ""
+    t[k]=s
+    return s
+  end })
+  s[offset]=t
+  return t
+end
+local extra,tab,start=0,0,4,0
+local nspaces=strings.newrepeater(" ")
+string.nspaces=nspaces
+local pattern=Carg(1)/function(t)
+    extra,tab,start=0,t or 7,1
+  end*Cs((
+   Cp()*patterns.tab/function(position)
+     local current=(position-start+1)+extra
+     local spaces=tab-(current-1)%tab
+     if spaces>0 then
+       extra=extra+spaces-1
+       return nspaces[spaces] 
+     else
+       return ""
+     end
+   end+newline*Cp()/function(position)
+     extra,start=0,position
+   end+patterns.anything
+ )^1)
+function strings.tabtospace(str,tab)
+  return lpegmatch(pattern,str,1,tab or 7)
+end
+local space=spacer^0
+local nospace=space/""
+local endofline=nospace*newline
+local stripend=(whitespace^1*endofstring)/""
+local normalline=(nospace*((1-space*(newline+endofstring))^1)*nospace)
+local stripempty=endofline^1/""
+local normalempty=endofline^1
+local singleempty=endofline*(endofline^0/"")
+local doubleempty=endofline*endofline^-1*(endofline^0/"")
+local stripstart=stripempty^0
+local p_prune_normal=Cs (stripstart*(stripend+normalline+normalempty )^0 )
+local p_prune_collapse=Cs (stripstart*(stripend+normalline+doubleempty )^0 )
+local p_prune_noempty=Cs (stripstart*(stripend+normalline+singleempty )^0 )
+local p_retain_normal=Cs ((normalline+normalempty )^0 )
+local p_retain_collapse=Cs ((normalline+doubleempty )^0 )
+local p_retain_noempty=Cs ((normalline+singleempty )^0 )
+local striplinepatterns={
+  ["prune"]=p_prune_normal,
+  ["prune and collapse"]=p_prune_collapse,
+  ["prune and no empty"]=p_prune_noempty,
+  ["retain"]=p_retain_normal,
+  ["retain and collapse"]=p_retain_collapse,
+  ["retain and no empty"]=p_retain_noempty,
+  ["collapse"]=patterns.collapser,
+}
+setmetatable(striplinepatterns,{ __index=function(t,k) return p_prune_collapse end })
+strings.striplinepatterns=striplinepatterns
+function strings.striplines(str,how)
+  return str and lpegmatch(striplinepatterns[how],str) or str
+end
+strings.striplong=strings.striplines
+function strings.nice(str)
+  str=gsub(str,"[:%-+_]+"," ") 
+  return str
+end
+local n=0
+local sequenced=table.sequenced
+function string.autodouble(s,sep)
+  if s==nil then
+    return '""'
+  end
+  local t=type(s)
+  if t=="number" then
+    return tostring(s) 
+  end
+  if t=="table" then
+    return ('"'..sequenced(s,sep or ",")..'"')
+  end
+  return ('"'..tostring(s)..'"')
+end
+function string.autosingle(s,sep)
+  if s==nil then
+    return "''"
+  end
+  local t=type(s)
+  if t=="number" then
+    return tostring(s) 
+  end
+  if t=="table" then
+    return ("'"..sequenced(s,sep or ",").."'")
+  end
+  return ("'"..tostring(s).."'")
+end
+local tracedchars={ [0]=
+  "[null]","[soh]","[stx]","[etx]","[eot]","[enq]","[ack]","[bel]",
+  "[bs]","[ht]","[lf]","[vt]","[ff]","[cr]","[so]","[si]",
+  "[dle]","[dc1]","[dc2]","[dc3]","[dc4]","[nak]","[syn]","[etb]",
+  "[can]","[em]","[sub]","[esc]","[fs]","[gs]","[rs]","[us]",
+  "[space]",
+}
+string.tracedchars=tracedchars
+strings.tracers=tracedchars
+function string.tracedchar(b)
+  if type(b)=="number" then
+    return tracedchars[b] or (utfchar(b).." (U+"..format("%05X",b)..")")
+  else
+    local c=utfbyte(b)
+    return tracedchars[c] or (b.." (U+"..(c and format("%05X",c) or "?????")..")")
+  end
+end
+function number.signed(i)
+  if i>0 then
+    return "+",i
+  else
+    return "-",-i
+  end
+end
+local digit=patterns.digit
+local period=patterns.period
+local three=digit*digit*digit
+local splitter=Cs (
+  (((1-(three^1*period))^1+C(three))*(Carg(1)*three)^1+C((1-period)^1))*(P(1)/""*Carg(2))*C(2)
+)
+patterns.formattednumber=splitter
+function number.formatted(n,sep1,sep2)
+  local s=type(s)=="string" and n or format("%0.2f",n)
+  if sep1==true then
+    return lpegmatch(splitter,s,1,".",",")
+  elseif sep1=="." then
+    return lpegmatch(splitter,s,1,sep1,sep2 or ",")
+  elseif sep1=="," then
+    return lpegmatch(splitter,s,1,sep1,sep2 or ".")
+  else
+    return lpegmatch(splitter,s,1,sep1 or ",",sep2 or ".")
+  end
+end
+local p=Cs(
+    P("-")^0*(P("0")^1/"")^0*(1-P("."))^0*(P(".")*P("0")^1*P(-1)/""+P(".")^0)*P(1-P("0")^1*P(-1))^0
+  )
+function number.compactfloat(n,fmt)
+  if n==0 then
+    return "0"
+  elseif n==1 then
+    return "1"
+  end
+  n=lpegmatch(p,format(fmt or "%0.3f",n))
+  if n=="." or n=="" or n=="-" then
+    return "0"
+  end
+  return n
+end
+local zero=P("0")^1/""
+local plus=P("+")/""
+local minus=P("-")
+local separator=S(".")
+local digit=R("09")
+local trailing=zero^1*#S("eE")
+local exponent=(S("eE")*(plus+Cs((minus*zero^0*P(-1))/"")+minus)*zero^0*(P(-1)*Cc("0")+P(1)^1))
+local pattern_a=Cs(minus^0*digit^1*(separator/""*trailing+separator*(trailing+digit)^0)*exponent)
+local pattern_b=Cs((exponent+P(1))^0)
+function number.sparseexponent(f,n)
+  if not n then
+    n=f
+    f="%e"
+  end
+  local tn=type(n)
+  if tn=="string" then 
+    local m=tonumber(n)
+    if m then
+      return lpegmatch((f=="%e" or f=="%E") and pattern_a or pattern_b,format(f,m))
+    end
+  elseif tn=="number" then
+    return lpegmatch((f=="%e" or f=="%E") and pattern_a or pattern_b,format(f,n))
+  end
+  return tostring(n)
+end
+local hf={}
+local hs={}
+setmetatable(hf,{ __index=function(t,k)
+  local v="%."..k.."f"
+  t[k]=v
+  return v
+end } )
+setmetatable(hs,{ __index=function(t,k)
+  local v="%"..k.."s"
+  t[k]=v
+  return v
+end } )
+function number.formattedfloat(n,b,a)
+  local s=format(hf[a],n)
+  local l=(b or 0)+(a or 0)+1
+  if #s<l then
+    return format(hs[l],s)
+  else
+    return s
+  end
+end
+local template=[[
+%s
+%s
+return function(%s) return %s end
+]]
+local preamble,environment="",{}
+if _LUAVERSION<5.2 then
+  preamble=[[
+local lpeg=lpeg
+local type=type
+local tostring=tostring
+local tonumber=tonumber
+local format=string.format
+local concat=table.concat
+local signed=number.signed
+local points=number.points
+local basepoints= number.basepoints
+local utfchar=utf.char
+local utfbyte=utf.byte
+local lpegmatch=lpeg.match
+local nspaces=string.nspaces
+local tracedchar=string.tracedchar
+local autosingle=string.autosingle
+local autodouble=string.autodouble
+local sequenced=table.sequenced
+local formattednumber=number.formatted
+local sparseexponent=number.sparseexponent
+local formattedfloat=number.formattedfloat
+    ]]
+else
+  environment={
+    global=global or _G,
+    lpeg=lpeg,
+    type=type,
+    tostring=tostring,
+    tonumber=tonumber,
+    format=string.format,
+    concat=table.concat,
+    signed=number.signed,
+    points=number.points,
+    basepoints=number.basepoints,
+    utfchar=utf.char,
+    utfbyte=utf.byte,
+    lpegmatch=lpeg.match,
+    nspaces=string.nspaces,
+    tracedchar=string.tracedchar,
+    autosingle=string.autosingle,
+    autodouble=string.autodouble,
+    sequenced=table.sequenced,
+    formattednumber=number.formatted,
+    sparseexponent=number.sparseexponent,
+    formattedfloat=number.formattedfloat
+  }
+end
+local arguments={ "a1" } 
+setmetatable(arguments,{ __index=function(t,k)
+    local v=t[k-1]..",a"..k
+    t[k]=v
+    return v
+  end
+})
+local prefix_any=C((S("+- .")+R("09"))^0)
+local prefix_sub=(C((S("+-")+R("09"))^0)+Cc(0))*P(".")*(C((S("+-")+R("09"))^0)+Cc(0))
+local prefix_tab=P("{")*C((1-P("}"))^0)*P("}")+C((1-R("az","AZ","09","%%"))^0)
+local format_s=function(f)
+  n=n+1
+  if f and f~="" then
+    return format("format('%%%ss',a%s)",f,n)
+  else 
+    return format("(a%s or '')",n) 
+  end
+end
+local format_S=function(f) 
+  n=n+1
+  if f and f~="" then
+    return format("format('%%%ss',tostring(a%s))",f,n)
+  else
+    return format("tostring(a%s)",n)
+  end
+end
+local format_q=function()
+  n=n+1
+  return format("(a%s and format('%%q',a%s) or '')",n,n) 
+end
+local format_Q=function() 
+  n=n+1
+  return format("format('%%q',tostring(a%s))",n)
+end
+local format_i=function(f)
+  n=n+1
+  if f and f~="" then
+    return format("format('%%%si',a%s)",f,n)
+  else
+    return format("format('%%i',a%s)",n) 
+  end
+end
+local format_d=format_i
+local format_I=function(f)
+  n=n+1
+  return format("format('%%s%%%si',signed(a%s))",f,n)
+end
+local format_f=function(f)
+  n=n+1
+  return format("format('%%%sf',a%s)",f,n)
+end
+local format_F=function(f) 
+  n=n+1
+  if not f or f=="" then
+    return format("(((a%s > -0.0000000005 and a%s < 0.0000000005) and '0') or format((a%s %% 1 == 0) and '%%i' or '%%.9f',a%s))",n,n,n,n)
+  else
+    return format("format((a%s %% 1 == 0) and '%%i' or '%%%sf',a%s)",n,f,n)
+  end
+end
+local format_k=function(b,a) 
+  n=n+1
+  return format("formattedfloat(a%s,%i,%i)",n,b or 0,a or 0)
+end
+local format_g=function(f)
+  n=n+1
+  return format("format('%%%sg',a%s)",f,n)
+end
+local format_G=function(f)
+  n=n+1
+  return format("format('%%%sG',a%s)",f,n)
+end
+local format_e=function(f)
+  n=n+1
+  return format("format('%%%se',a%s)",f,n)
+end
+local format_E=function(f)
+  n=n+1
+  return format("format('%%%sE',a%s)",f,n)
+end
+local format_j=function(f)
+  n=n+1
+  return format("sparseexponent('%%%se',a%s)",f,n)
+end
+local format_J=function(f)
+  n=n+1
+  return format("sparseexponent('%%%sE',a%s)",f,n)
+end
+local format_x=function(f)
+  n=n+1
+  return format("format('%%%sx',a%s)",f,n)
+end
+local format_X=function(f)
+  n=n+1
+  return format("format('%%%sX',a%s)",f,n)
+end
+local format_o=function(f)
+  n=n+1
+  return format("format('%%%so',a%s)",f,n)
+end
+local format_c=function()
+  n=n+1
+  return format("utfchar(a%s)",n)
+end
+local format_C=function()
+  n=n+1
+  return format("tracedchar(a%s)",n)
+end
+local format_r=function(f)
+  n=n+1
+  return format("format('%%%s.0f',a%s)",f,n)
+end
+local format_h=function(f)
+  n=n+1
+  if f=="-" then
+    f=sub(f,2)
+    return format("format('%%%sx',type(a%s) == 'number' and a%s or utfbyte(a%s))",f=="" and "05" or f,n,n,n)
+  else
+    return format("format('0x%%%sx',type(a%s) == 'number' and a%s or utfbyte(a%s))",f=="" and "05" or f,n,n,n)
+  end
+end
+local format_H=function(f)
+  n=n+1
+  if f=="-" then
+    f=sub(f,2)
+    return format("format('%%%sX',type(a%s) == 'number' and a%s or utfbyte(a%s))",f=="" and "05" or f,n,n,n)
+  else
+    return format("format('0x%%%sX',type(a%s) == 'number' and a%s or utfbyte(a%s))",f=="" and "05" or f,n,n,n)
+  end
+end
+local format_u=function(f)
+  n=n+1
+  if f=="-" then
+    f=sub(f,2)
+    return format("format('%%%sx',type(a%s) == 'number' and a%s or utfbyte(a%s))",f=="" and "05" or f,n,n,n)
+  else
+    return format("format('u+%%%sx',type(a%s) == 'number' and a%s or utfbyte(a%s))",f=="" and "05" or f,n,n,n)
+  end
+end
+local format_U=function(f)
+  n=n+1
+  if f=="-" then
+    f=sub(f,2)
+    return format("format('%%%sX',type(a%s) == 'number' and a%s or utfbyte(a%s))",f=="" and "05" or f,n,n,n)
+  else
+    return format("format('U+%%%sX',type(a%s) == 'number' and a%s or utfbyte(a%s))",f=="" and "05" or f,n,n,n)
+  end
+end
+local format_p=function()
+  n=n+1
+  return format("points(a%s)",n)
+end
+local format_b=function()
+  n=n+1
+  return format("basepoints(a%s)",n)
+end
+local format_t=function(f)
+  n=n+1
+  if f and f~="" then
+    return format("concat(a%s,%q)",n,f)
+  else
+    return format("concat(a%s)",n)
+  end
+end
+local format_T=function(f)
+  n=n+1
+  if f and f~="" then
+    return format("sequenced(a%s,%q)",n,f)
+  else
+    return format("sequenced(a%s)",n)
+  end
+end
+local format_l=function()
+  n=n+1
+  return format("(a%s and 'true' or 'false')",n)
+end
+local format_L=function()
+  n=n+1
+  return format("(a%s and 'TRUE' or 'FALSE')",n)
+end
+local format_N=function() 
+  n=n+1
+  return format("tostring(tonumber(a%s) or a%s)",n,n)
+end
+local format_a=function(f)
+  n=n+1
+  if f and f~="" then
+    return format("autosingle(a%s,%q)",n,f)
+  else
+    return format("autosingle(a%s)",n)
+  end
+end
+local format_A=function(f)
+  n=n+1
+  if f and f~="" then
+    return format("autodouble(a%s,%q)",n,f)
+  else
+    return format("autodouble(a%s)",n)
+  end
+end
+local format_w=function(f) 
+  n=n+1
+  f=tonumber(f)
+  if f then 
+    return format("nspaces[%s+a%s]",f,n) 
+  else
+    return format("nspaces[a%s]",n) 
+  end
+end
+local format_W=function(f) 
+  return format("nspaces[%s]",tonumber(f) or 0)
+end
+local format_m=function(f)
+  n=n+1
+  if not f or f=="" then
+    f=","
+  end
+  return format([[formattednumber(a%s,%q,".")]],n,f)
+end
+local format_M=function(f)
+  n=n+1
+  if not f or f=="" then
+    f="."
+  end
+  return format([[formattednumber(a%s,%q,",")]],n,f)
+end
+local format_z=function(f)
+  n=n+(tonumber(f) or 1)
+  return "''" 
+end
+local format_rest=function(s)
+  return format("%q",s) 
+end
+local format_extension=function(extensions,f,name)
+  local extension=extensions[name] or "tostring(%s)"
+  local f=tonumber(f) or 1
+  local w=find(extension,"%.%.%.")
+  if f==0 then
+    if w then
+      extension=gsub(extension,"%.%.%.","")
+    end
+    return extension
+  elseif f==1 then
+    if w then
+      extension=gsub(extension,"%.%.%.","%%s")
+    end
+    n=n+1
+    local a="a"..n
+    return format(extension,a,a) 
+  elseif f<0 then
+    local a="a"..(n+f+1)
+    return format(extension,a,a)
+  else
+    if w then
+      extension=gsub(extension,"%.%.%.",rep("%%s,",f-1).."%%s")
+    end
+    local t={}
+    for i=1,f do
+      n=n+1
+      t[i]="a"..n
+    end
+    return format(extension,unpack(t))
+  end
+end
+local builder=Cs { "start",
+  start=(
+    (
+      P("%")/""*(
+        V("!") 
++V("s")+V("q")+V("i")+V("d")+V("f")+V("F")+V("g")+V("G")+V("e")+V("E")+V("x")+V("X")+V("o")
++V("c")+V("C")+V("S") 
++V("Q") 
++V("N") 
++V("k")
++V("r")+V("h")+V("H")+V("u")+V("U")+V("p")+V("b")+V("t")+V("T")+V("l")+V("L")+V("I")+V("w") 
++V("W") 
++V("a") 
++V("A") 
++V("j")+V("J") 
++V("m")+V("M") 
++V("z")
+      )+V("*")
+    )*(P(-1)+Carg(1))
+  )^0,
+  ["s"]=(prefix_any*P("s"))/format_s,
+  ["q"]=(prefix_any*P("q"))/format_q,
+  ["i"]=(prefix_any*P("i"))/format_i,
+  ["d"]=(prefix_any*P("d"))/format_d,
+  ["f"]=(prefix_any*P("f"))/format_f,
+  ["F"]=(prefix_any*P("F"))/format_F,
+  ["g"]=(prefix_any*P("g"))/format_g,
+  ["G"]=(prefix_any*P("G"))/format_G,
+  ["e"]=(prefix_any*P("e"))/format_e,
+  ["E"]=(prefix_any*P("E"))/format_E,
+  ["x"]=(prefix_any*P("x"))/format_x,
+  ["X"]=(prefix_any*P("X"))/format_X,
+  ["o"]=(prefix_any*P("o"))/format_o,
+  ["S"]=(prefix_any*P("S"))/format_S,
+  ["Q"]=(prefix_any*P("Q"))/format_S,
+  ["N"]=(prefix_any*P("N"))/format_N,
+  ["k"]=(prefix_sub*P("k"))/format_k,
+  ["c"]=(prefix_any*P("c"))/format_c,
+  ["C"]=(prefix_any*P("C"))/format_C,
+  ["r"]=(prefix_any*P("r"))/format_r,
+  ["h"]=(prefix_any*P("h"))/format_h,
+  ["H"]=(prefix_any*P("H"))/format_H,
+  ["u"]=(prefix_any*P("u"))/format_u,
+  ["U"]=(prefix_any*P("U"))/format_U,
+  ["p"]=(prefix_any*P("p"))/format_p,
+  ["b"]=(prefix_any*P("b"))/format_b,
+  ["t"]=(prefix_tab*P("t"))/format_t,
+  ["T"]=(prefix_tab*P("T"))/format_T,
+  ["l"]=(prefix_any*P("l"))/format_l,
+  ["L"]=(prefix_any*P("L"))/format_L,
+  ["I"]=(prefix_any*P("I"))/format_I,
+  ["w"]=(prefix_any*P("w"))/format_w,
+  ["W"]=(prefix_any*P("W"))/format_W,
+  ["j"]=(prefix_any*P("j"))/format_j,
+  ["J"]=(prefix_any*P("J"))/format_J,
+  ["m"]=(prefix_tab*P("m"))/format_m,
+  ["M"]=(prefix_tab*P("M"))/format_M,
+  ["z"]=(prefix_any*P("z"))/format_z,
+  ["a"]=(prefix_any*P("a"))/format_a,
+  ["A"]=(prefix_any*P("A"))/format_A,
+  ["*"]=Cs(((1-P("%"))^1+P("%%")/"%%")^1)/format_rest,
+  ["?"]=Cs(((1-P("%"))^1        )^1)/format_rest,
+  ["!"]=Carg(2)*prefix_any*P("!")*C((1-P("!"))^1)*P("!")/format_extension,
+}
+local direct=Cs (
+  P("%")*(S("+- .")+R("09"))^0*S("sqidfgGeExXo")*P(-1)/[[local format = string.format return function(str) return format("%0",str) end]]
+)
+local function make(t,str)
+  local f
+  local p
+  local p=lpegmatch(direct,str)
+  if p then
+    f=loadstripped(p)()
+  else
+    n=0
+    p=lpegmatch(builder,str,1,t._connector_,t._extensions_) 
+    if n>0 then
+      p=format(template,preamble,t._preamble_,arguments[n],p)
+      f=loadstripped(p,t._environment_)() 
+    else
+      f=function() return str end
+    end
+  end
+  t[str]=f
+  return f
+end
+local function use(t,fmt,...)
+  return t[fmt](...)
+end
+strings.formatters={}
+if _LUAVERSION<5.2 then
+  function strings.formatters.new(noconcat)
+    local t={ _type_="formatter",_connector_=noconcat and "," or "..",_extensions_={},_preamble_=preamble,_environment_={} }
+    setmetatable(t,{ __index=make,__call=use })
+    return t
+  end
+else
+  function strings.formatters.new(noconcat)
+    local e={} 
+    for k,v in next,environment do
+      e[k]=v
+    end
+    local t={ _type_="formatter",_connector_=noconcat and "," or "..",_extensions_={},_preamble_="",_environment_=e }
+    setmetatable(t,{ __index=make,__call=use })
+    return t
+  end
+end
+local formatters=strings.formatters.new() 
+string.formatters=formatters 
+string.formatter=function(str,...) return formatters[str](...) end 
+local function add(t,name,template,preamble)
+  if type(t)=="table" and t._type_=="formatter" then
+    t._extensions_[name]=template or "%s"
+    if type(preamble)=="string" then
+      t._preamble_=preamble.."\n"..t._preamble_ 
+    elseif type(preamble)=="table" then
+      for k,v in next,preamble do
+        t._environment_[k]=v
+      end
+    end
+  end
+end
+strings.formatters.add=add
+patterns.xmlescape=Cs((P("<")/"&lt;"+P(">")/"&gt;"+P("&")/"&amp;"+P('"')/"&quot;"+P(1))^0)
+patterns.texescape=Cs((C(S("#$%\\{}"))/"\\%1"+P(1))^0)
+patterns.luaescape=Cs(((1-S('"\n'))^1+P('"')/'\\"'+P('\n')/'\\n"')^0) 
+patterns.luaquoted=Cs(Cc('"')*((1-S('"\n'))^1+P('"')/'\\"'+P('\n')/'\\n"')^0*Cc('"'))
+if _LUAVERSION<5.2 then
+  add(formatters,"xml",[[lpegmatch(xmlescape,%s)]],"local xmlescape = lpeg.patterns.xmlescape")
+  add(formatters,"tex",[[lpegmatch(texescape,%s)]],"local texescape = lpeg.patterns.texescape")
+  add(formatters,"lua",[[lpegmatch(luaescape,%s)]],"local luaescape = lpeg.patterns.luaescape")
+else
+  add(formatters,"xml",[[lpegmatch(xmlescape,%s)]],{ xmlescape=lpeg.patterns.xmlescape })
+  add(formatters,"tex",[[lpegmatch(texescape,%s)]],{ texescape=lpeg.patterns.texescape })
+  add(formatters,"lua",[[lpegmatch(luaescape,%s)]],{ luaescape=lpeg.patterns.luaescape })
+end
+local dquote=patterns.dquote 
+local equote=patterns.escaped+dquote/'\\"'+1
+local space=patterns.space
+local cquote=Cc('"')
+local pattern=Cs(dquote*(equote-P(-2))^0*dquote)          
++Cs(cquote*(equote-space)^0*space*equote^0*cquote) 
+function string.optionalquoted(str)
+  return lpegmatch(pattern,str) or str
+end
+local pattern=Cs((newline/(os.newline or "\r")+1)^0)
+function string.replacenewlines(str)
+  return lpegmatch(pattern,str)
+end
+function strings.newcollector()
+  local result,r={},0
+  return
+    function(fmt,str,...) 
+      r=r+1
+      result[r]=str==nil and fmt or formatters[fmt](str,...)
+    end,
+    function(connector) 
+      if result then
+        local str=concat(result,connector)
+        result,r={},0
+        return str
+      end
+    end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['util-fil']={
+  version=1.001,
+  comment="companion to luat-lib.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local byte=string.byte
+local char=string.char
+local extract=bit32 and bit32.extract
+local floor=math.floor
+utilities=utilities or {}
+local files={}
+utilities.files=files
+local zerobased={}
+function files.open(filename,zb)
+  local f=io.open(filename,"rb")
+  if f then
+    zerobased[f]=zb or false
+  end
+  return f
+end
+function files.close(f)
+  zerobased[f]=nil
+  f:close()
+end
+function files.size(f)
+  local current=f:seek()
+  local size=f:seek("end")
+  f:seek("set",current)
+  return size
+end
+files.getsize=files.size
+function files.setposition(f,n)
+  if zerobased[f] then
+    f:seek("set",n)
+  else
+    f:seek("set",n-1)
+  end
+end
+function files.getposition(f)
+  if zerobased[f] then
+    return f:seek()
+  else
+    return f:seek()+1
+  end
+end
+function files.look(f,n,chars)
+  local p=f:seek()
+  local s=f:read(n)
+  f:seek("set",p)
+  if chars then
+    return s
+  else
+    return byte(s,1,#s)
+  end
+end
+function files.skip(f,n)
+  if n==1 then
+    f:read(n)
+  else
+    f:seek("set",f:seek()+n)
+  end
+end
+function files.readbyte(f)
+  return byte(f:read(1))
+end
+function files.readbytes(f,n)
+  return byte(f:read(n),1,n)
+end
+function files.readbytetable(f,n)
+  local s=f:read(n or 1)
+  return { byte(s,1,#s) } 
+end
+function files.readchar(f)
+  return f:read(1)
+end
+function files.readstring(f,n)
+  return f:read(n or 1)
+end
+function files.readinteger1(f) 
+  local n=byte(f:read(1))
+  if n>=0x80 then
+    return n-0x100
+  else
+    return n
+  end
+end
+files.readcardinal1=files.readbyte 
+files.readcardinal=files.readcardinal1
+files.readinteger=files.readinteger1
+files.readsignedbyte=files.readinteger1
+function files.readcardinal2(f)
+  local a,b=byte(f:read(2),1,2)
+  return 0x100*a+b
+end
+function files.readcardinal2le(f)
+  local b,a=byte(f:read(2),1,2)
+  return 0x100*a+b
+end
+function files.readinteger2(f)
+  local a,b=byte(f:read(2),1,2)
+  if a>=0x80 then
+    return 0x100*a+b-0x10000
+  else
+    return 0x100*a+b
+  end
+end
+function files.readinteger2le(f)
+  local b,a=byte(f:read(2),1,2)
+  if a>=0x80 then
+    return 0x100*a+b-0x10000
+  else
+    return 0x100*a+b
+  end
+end
+function files.readcardinal3(f)
+  local a,b,c=byte(f:read(3),1,3)
+  return 0x10000*a+0x100*b+c
+end
+function files.readcardinal3le(f)
+  local c,b,a=byte(f:read(3),1,3)
+  return 0x10000*a+0x100*b+c
+end
+function files.readinteger3(f)
+  local a,b,c=byte(f:read(3),1,3)
+  if a>=0x80 then
+    return 0x10000*a+0x100*b+c-0x1000000
+  else
+    return 0x10000*a+0x100*b+c
+  end
+end
+function files.readinteger3le(f)
+  local c,b,a=byte(f:read(3),1,3)
+  if a>=0x80 then
+    return 0x10000*a+0x100*b+c-0x1000000
+  else
+    return 0x10000*a+0x100*b+c
+  end
+end
+function files.readcardinal4(f)
+  local a,b,c,d=byte(f:read(4),1,4)
+  return 0x1000000*a+0x10000*b+0x100*c+d
+end
+function files.readcardinal4le(f)
+  local d,c,b,a=byte(f:read(4),1,4)
+  return 0x1000000*a+0x10000*b+0x100*c+d
+end
+function files.readinteger4(f)
+  local a,b,c,d=byte(f:read(4),1,4)
+  if a>=0x80 then
+    return 0x1000000*a+0x10000*b+0x100*c+d-0x100000000
+  else
+    return 0x1000000*a+0x10000*b+0x100*c+d
+  end
+end
+function files.readinteger4le(f)
+  local d,c,b,a=byte(f:read(4),1,4)
+  if a>=0x80 then
+    return 0x1000000*a+0x10000*b+0x100*c+d-0x100000000
+  else
+    return 0x1000000*a+0x10000*b+0x100*c+d
+  end
+end
+function files.readfixed2(f)
+  local a,b=byte(f:read(2),1,2)
+  if a>=0x80 then
+    return (a-0x100)+b/0x100
+  else
+    return (a    )+b/0x100
+  end
+end
+function files.readfixed4(f)
+  local a,b,c,d=byte(f:read(4),1,4)
+  if a>=0x80 then
+    return (0x100*a+b-0x10000)+(0x100*c+d)/0x10000
+  else
+    return (0x100*a+b     )+(0x100*c+d)/0x10000
+  end
+end
+if extract then
+  local extract=bit32.extract
+  local band=bit32.band
+  function files.read2dot14(f)
+    local a,b=byte(f:read(2),1,2)
+    if a>=0x80 then
+      local n=-(0x100*a+b)
+      return-(extract(n,14,2)+(band(n,0x3FFF)/16384.0))
+    else
+      local n=0x100*a+b
+      return  (extract(n,14,2)+(band(n,0x3FFF)/16384.0))
+    end
+  end
+end
+function files.skipshort(f,n)
+  f:read(2*(n or 1))
+end
+function files.skiplong(f,n)
+  f:read(4*(n or 1))
+end
+function files.writecardinal2(f,n)
+  local a=char(n%256)
+  n=floor(n/256)
+  local b=char(n%256)
+  f:write(b,a)
+end
+function files.writecardinal4(f,n)
+  local a=char(n%256)
+  n=floor(n/256)
+  local b=char(n%256)
+  n=floor(n/256)
+  local c=char(n%256)
+  n=floor(n/256)
+  local d=char(n%256)
+  f:write(d,c,b,a)
+end
+function files.writestring(f,s)
+  f:write(char(byte(s,1,#s)))
+end
+function files.writebyte(f,b)
+  f:write(char(b))
+end
+if fio and fio.readcardinal1 then
+  files.readcardinal1=fio.readcardinal1
+  files.readcardinal2=fio.readcardinal2
+  files.readcardinal3=fio.readcardinal3
+  files.readcardinal4=fio.readcardinal4
+  files.readinteger1=fio.readinteger1
+  files.readinteger2=fio.readinteger2
+  files.readinteger3=fio.readinteger3
+  files.readinteger4=fio.readinteger4
+  files.read2dot14=fio.read2dot14
+  files.setposition=fio.setposition
+  files.getposition=fio.getposition
+  files.readbyte=files.readcardinal1
+  files.readsignedbyte=files.readinteger1
+  files.readcardinal=files.readcardinal1
+  files.readinteger=files.readinteger1
+  local skipposition=fio.skipposition
+  files.skipposition=skipposition
+  files.readbytes=fio.readbytes
+  files.readbytetable=fio.readbytetable
+  function files.skipshort(f,n)
+    skipposition(f,2*(n or 1))
+  end
+  function files.skiplong(f,n)
+    skipposition(f,4*(n or 1))
+  end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['luat-basics-gen']={
+  version=1.100,
+  comment="companion to luatex-*.tex",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+if context then
+  texio.write_nl("fatal error: this module is not for context")
+  os.exit()
+end
+local dummyfunction=function()
+end
+local dummyreporter=function(c)
+  return function(f,...)
+    local r=texio.reporter or texio.write_nl
+    if f then
+      r(c.." : "..string.formatters(f,...))
+    else
+      r("")
+    end
+  end
+end
+statistics={
+  register=dummyfunction,
+  starttiming=dummyfunction,
+  stoptiming=dummyfunction,
+  elapsedtime=nil,
+}
+directives={
+  register=dummyfunction,
+  enable=dummyfunction,
+  disable=dummyfunction,
+}
+trackers={
+  register=dummyfunction,
+  enable=dummyfunction,
+  disable=dummyfunction,
+}
+experiments={
+  register=dummyfunction,
+  enable=dummyfunction,
+  disable=dummyfunction,
+}
+storage={ 
+  register=dummyfunction,
+  shared={},
+}
+logs={
+  new=dummyreporter,
+  reporter=dummyreporter,
+  messenger=dummyreporter,
+  report=dummyfunction,
+}
+callbacks={
+  register=function(n,f)
+    return callback.register(n,f)
+  end,
+}
+utilities=utilities or {} utilities.storage={
+  allocate=function(t)
+    return t or {}
+  end,
+  mark=function(t)
+    return t or {}
+  end,
+}
+characters=characters or {
+  data={}
+}
+texconfig.kpse_init=true
+resolvers=resolvers or {} 
+local remapper={
+  otf="opentype fonts",
+  ttf="truetype fonts",
+  ttc="truetype fonts",
+  cid="cid maps",
+  cidmap="cid maps",
+  pfb="type1 fonts",
+  afm="afm",
+  enc="enc files",
+}
+function resolvers.findfile(name,fileformat)
+  name=string.gsub(name,"\\","/")
+  if not fileformat or fileformat=="" then
+    fileformat=file.suffix(name)
+    if fileformat=="" then
+      fileformat="tex"
+    end
+  end
+  fileformat=string.lower(fileformat)
+  fileformat=remapper[fileformat] or fileformat
+  local found=kpse.find_file(name,fileformat)
+  if not found or found=="" then
+    found=kpse.find_file(name,"other text files")
+  end
+  return found
+end
+resolvers.findbinfile=resolvers.findfile
+function resolvers.loadbinfile(filename,filetype)
+  local data=io.loaddata(filename)
+  return true,data,#data
+end
+function resolvers.resolve(s)
+  return s
+end
+function resolvers.unresolve(s)
+  return s
+end
+caches={}
+local writable=nil
+local readables={}
+local usingjit=jit
+if not caches.namespace or caches.namespace=="" or caches.namespace=="context" then
+  caches.namespace='generic'
+end
+do
+  local cachepaths=kpse.expand_var('$TEXMFCACHE') or ""
+  if cachepaths=="" or cachepaths=="$TEXMFCACHE" then
+    cachepaths=kpse.expand_var('$TEXMFVAR') or ""
+  end
+  if cachepaths=="" or cachepaths=="$TEXMFVAR" then
+    cachepaths=kpse.expand_var('$VARTEXMF') or ""
+  end
+  if cachepaths=="" then
+    local fallbacks={ "TMPDIR","TEMPDIR","TMP","TEMP","HOME","HOMEPATH" }
+    for i=1,#fallbacks do
+      cachepaths=os.getenv(fallbacks[i]) or ""
+      if cachepath~="" and lfs.isdir(cachepath) then
+        break
+      end
+    end
+  end
+  if cachepaths=="" then
+    cachepaths="."
+  end
+  cachepaths=string.split(cachepaths,os.type=="windows" and ";" or ":")
+  for i=1,#cachepaths do
+    local cachepath=cachepaths[i]
+    if not lfs.isdir(cachepath) then
+      lfs.mkdirs(cachepath) 
+      if lfs.isdir(cachepath) then
+        texio.write(string.format("(created cache path: %s)",cachepath))
+      end
+    end
+    if file.is_writable(cachepath) then
+      writable=file.join(cachepath,"luatex-cache")
+      lfs.mkdir(writable)
+      writable=file.join(writable,caches.namespace)
+      lfs.mkdir(writable)
+      break
+    end
+  end
+  for i=1,#cachepaths do
+    if file.is_readable(cachepaths[i]) then
+      readables[#readables+1]=file.join(cachepaths[i],"luatex-cache",caches.namespace)
+    end
+  end
+  if not writable then
+    texio.write_nl("quiting: fix your writable cache path")
+    os.exit()
+  elseif #readables==0 then
+    texio.write_nl("quiting: fix your readable cache path")
+    os.exit()
+  elseif #readables==1 and readables[1]==writable then
+    texio.write(string.format("(using cache: %s)",writable))
+  else
+    texio.write(string.format("(using write cache: %s)",writable))
+    texio.write(string.format("(using read cache: %s)",table.concat(readables," ")))
+  end
+end
+function caches.getwritablepath(category,subcategory)
+  local path=file.join(writable,category)
+  lfs.mkdir(path)
+  path=file.join(path,subcategory)
+  lfs.mkdir(path)
+  return path
+end
+function caches.getreadablepaths(category,subcategory)
+  local t={}
+  for i=1,#readables do
+    t[i]=file.join(readables[i],category,subcategory)
+  end
+  return t
+end
+local function makefullname(path,name)
+  if path and path~="" then
+    return file.addsuffix(file.join(path,name),"lua"),file.addsuffix(file.join(path,name),usingjit and "lub" or "luc")
+  end
+end
+function caches.is_writable(path,name)
+  local fullname=makefullname(path,name)
+  return fullname and file.is_writable(fullname)
+end
+function caches.loaddata(readables,name,writable)
+  for i=1,#readables do
+    local path=readables[i]
+    local loader=false
+    local luaname,lucname=makefullname(path,name)
+    if lfs.isfile(lucname) then
+      texio.write(string.format("(load luc: %s)",lucname))
+      loader=loadfile(lucname)
+    end
+    if not loader and lfs.isfile(luaname) then
+      local luacrap,lucname=makefullname(writable,name)
+      texio.write(string.format("(compiling luc: %s)",lucname))
+      if lfs.isfile(lucname) then
+        loader=loadfile(lucname)
+      end
+      caches.compile(data,luaname,lucname)
+      if lfs.isfile(lucname) then
+        texio.write(string.format("(load luc: %s)",lucname))
+        loader=loadfile(lucname)
+      else
+        texio.write(string.format("(loading failed: %s)",lucname))
+      end
+      if not loader then
+        texio.write(string.format("(load lua: %s)",luaname))
+        loader=loadfile(luaname)
+      else
+        texio.write(string.format("(loading failed: %s)",luaname))
+      end
+    end
+    if loader then
+      loader=loader()
+      collectgarbage("step")
+      return loader
+    end
+  end
+  return false
+end
+function caches.savedata(path,name,data)
+  local luaname,lucname=makefullname(path,name)
+  if luaname then
+    texio.write(string.format("(save: %s)",luaname))
+    table.tofile(luaname,data,true)
+    if lucname and type(caches.compile)=="function" then
+      os.remove(lucname) 
+      texio.write(string.format("(save: %s)",lucname))
+      caches.compile(data,luaname,lucname)
+    end
+  end
+end
+function caches.compile(data,luaname,lucname)
+  local d=io.loaddata(luaname)
+  if not d or d=="" then
+    d=table.serialize(data,true) 
+  end
+  if d and d~="" then
+    local f=io.open(lucname,'wb')
+    if f then
+      local s=loadstring(d)
+      if s then
+        f:write(string.dump(s,true))
+      end
+      f:close()
+    end
+  end
+end
+function table.setmetatableindex(t,f)
+  if type(t)~="table" then
+    f,t=t,{}
+  end
+  local m=getmetatable(t)
+  if f=="table" then
+    f=function(t,k) local v={} t[k]=v return v end
+  end
+  if m then
+    m.__index=f
+  else
+    setmetatable(t,{ __index=f })
+  end
+  return t
+end
+arguments={}
+if arg then
+  for i=1,#arg do
+    local k,v=string.match(arg[i],"^%-%-([^=]+)=?(.-)$")
+    if k and v then
+      arguments[k]=v
+    end
+  end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['data-con']={
+  version=1.100,
+  comment="companion to luat-lib.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local format,lower,gsub=string.format,string.lower,string.gsub
+local trace_cache=false trackers.register("resolvers.cache",function(v) trace_cache=v end)
+local trace_containers=false trackers.register("resolvers.containers",function(v) trace_containers=v end)
+local trace_storage=false trackers.register("resolvers.storage",function(v) trace_storage=v end)
+containers=containers or {}
+local containers=containers
+containers.usecache=true
+local report_containers=logs.reporter("resolvers","containers")
+local allocated={}
+local mt={
+  __index=function(t,k)
+    if k=="writable" then
+      local writable=caches.getwritablepath(t.category,t.subcategory) or { "." }
+      t.writable=writable
+      return writable
+    elseif k=="readables" then
+      local readables=caches.getreadablepaths(t.category,t.subcategory) or { "." }
+      t.readables=readables
+      return readables
+    end
+  end,
+  __storage__=true
+}
+function containers.define(category,subcategory,version,enabled)
+  if category and subcategory then
+    local c=allocated[category]
+    if not c then
+      c={}
+      allocated[category]=c
+    end
+    local s=c[subcategory]
+    if not s then
+      s={
+        category=category,
+        subcategory=subcategory,
+        storage={},
+        enabled=enabled,
+        version=version or math.pi,
+        trace=false,
+      }
+      setmetatable(s,mt)
+      c[subcategory]=s
+    end
+    return s
+  end
+end
+function containers.is_usable(container,name)
+  return container.enabled and caches and caches.is_writable(container.writable,name)
+end
+function containers.is_valid(container,name)
+  if name and name~="" then
+    local storage=container.storage[name]
+    return storage and storage.cache_version==container.version
+  else
+    return false
+  end
+end
+function containers.read(container,name)
+  local storage=container.storage
+  local stored=storage[name]
+  if not stored and container.enabled and caches and containers.usecache then
+    stored=caches.loaddata(container.readables,name,container.writable)
+    if stored and stored.cache_version==container.version then
+      if trace_cache or trace_containers then
+        report_containers("action %a, category %a, name %a","load",container.subcategory,name)
+      end
+    else
+      stored=nil
+    end
+    storage[name]=stored
+  elseif stored then
+    if trace_cache or trace_containers then
+      report_containers("action %a, category %a, name %a","reuse",container.subcategory,name)
+    end
+  end
+  return stored
+end
+function containers.write(container,name,data)
+  if data then
+    data.cache_version=container.version
+    if container.enabled and caches then
+      local unique,shared=data.unique,data.shared
+      data.unique,data.shared=nil,nil
+      caches.savedata(container.writable,name,data)
+      if trace_cache or trace_containers then
+        report_containers("action %a, category %a, name %a","save",container.subcategory,name)
+      end
+      data.unique,data.shared=unique,shared
+    end
+    if trace_cache or trace_containers then
+      report_containers("action %a, category %a, name %a","store",container.subcategory,name)
+    end
+    container.storage[name]=data
+  end
+  return data
+end
+function containers.content(container,name)
+  return container.storage[name]
+end
+function containers.cleanname(name)
+  return (gsub(lower(name),"[^%w\128-\255]+","-")) 
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['luatex-fonts-nod']={
+  version=1.001,
+  comment="companion to luatex-fonts.lua",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+if context then
+  texio.write_nl("fatal error: this module is not for context")
+  os.exit()
+end
+if tex.attribute[0]~=0 then
+  texio.write_nl("log","!")
+  texio.write_nl("log","! Attribute 0 is reserved for ConTeXt's font feature management and has to be")
+  texio.write_nl("log","! set to zero. Also, some attributes in the range 1-255 are used for special")
+  texio.write_nl("log","! purposes so setting them at the TeX end might break the font handler.")
+  texio.write_nl("log","!")
+  tex.attribute[0]=0 
+end
+attributes=attributes or {}
+attributes.unsetvalue=-0x7FFFFFFF
+local numbers,last={},127
+attributes.private=attributes.private or function(name)
+  local number=numbers[name]
+  if not number then
+    if last<255 then
+      last=last+1
+    end
+    number=last
+    numbers[name]=number
+  end
+  return number
+end
+nodes={}
+nodes.handlers={}
+local nodecodes={}
+local glyphcodes=node.subtypes("glyph")
+local disccodes=node.subtypes("disc")
+for k,v in next,node.types() do
+  v=string.gsub(v,"_","")
+  nodecodes[k]=v
+  nodecodes[v]=k
+end
+for i=0,#glyphcodes do
+  glyphcodes[glyphcodes[i]]=i
+end
+for i=0,#disccodes do
+  disccodes[disccodes[i]]=i
+end
+nodes.nodecodes=nodecodes
+nodes.glyphcodes=glyphcodes
+nodes.disccodes=disccodes
+local flush_node=node.flush_node
+local remove_node=node.remove
+local traverse_id=node.traverse_id
+nodes.handlers.protectglyphs=node.protect_glyphs
+nodes.handlers.unprotectglyphs=node.unprotect_glyphs
+local math_code=nodecodes.math
+local end_of_math=node.end_of_math
+function node.end_of_math(n)
+  if n.id==math_code and n.subtype==1 then
+    return n
+  else
+    return end_of_math(n)
+  end
+end
+function nodes.remove(head,current,free_too)
+  local t=current
+  head,current=remove_node(head,current)
+  if t then
+    if free_too then
+      flush_node(t)
+      t=nil
+    else
+      t.next,t.prev=nil,nil
+    end
+  end
+  return head,current,t
+end
+function nodes.delete(head,current)
+  return nodes.remove(head,current,true)
+end
+local getfield=node.getfield
+local setfield=node.setfield
+nodes.getfield=getfield
+nodes.setfield=setfield
+nodes.getattr=getfield
+nodes.setattr=setfield
+nodes.tostring=node.tostring or tostring
+nodes.copy=node.copy
+nodes.copy_node=node.copy
+nodes.copy_list=node.copy_list
+nodes.delete=node.delete
+nodes.dimensions=node.dimensions
+nodes.end_of_math=node.end_of_math
+nodes.flush_list=node.flush_list
+nodes.flush_node=node.flush_node
+nodes.flush=node.flush_node
+nodes.free=node.free
+nodes.insert_after=node.insert_after
+nodes.insert_before=node.insert_before
+nodes.hpack=node.hpack
+nodes.new=node.new
+nodes.tail=node.tail
+nodes.traverse=node.traverse
+nodes.traverse_id=node.traverse_id
+nodes.slide=node.slide
+nodes.vpack=node.vpack
+nodes.first_glyph=node.first_glyph
+nodes.has_glyph=node.has_glyph or node.first_glyph
+nodes.current_attr=node.current_attr
+nodes.has_field=node.has_field
+nodes.last_node=node.last_node
+nodes.usedlist=node.usedlist
+nodes.protrusion_skippable=node.protrusion_skippable
+nodes.write=node.write
+nodes.has_attribute=node.has_attribute
+nodes.set_attribute=node.set_attribute
+nodes.unset_attribute=node.unset_attribute
+nodes.protect_glyphs=node.protect_glyphs
+nodes.unprotect_glyphs=node.unprotect_glyphs
+nodes.mlist_to_hlist=node.mlist_to_hlist
+local direct=node.direct
+local nuts={}
+nodes.nuts=nuts
+local tonode=direct.tonode
+local tonut=direct.todirect
+nodes.tonode=tonode
+nodes.tonut=tonut
+nuts.tonode=tonode
+nuts.tonut=tonut
+local getfield=direct.getfield
+local setfield=direct.setfield
+nuts.getfield=getfield
+nuts.setfield=setfield
+nuts.getnext=direct.getnext
+nuts.setnext=direct.setnext
+nuts.getprev=direct.getprev
+nuts.setprev=direct.setprev
+nuts.getboth=direct.getboth
+nuts.setboth=direct.setboth
+nuts.getid=direct.getid
+nuts.getattr=direct.get_attribute or direct.has_attribute or getfield
+nuts.setattr=setfield
+nuts.getfont=direct.getfont
+nuts.setfont=direct.setfont
+nuts.getsubtype=direct.getsubtype
+nuts.setsubtype=direct.setsubtype
+nuts.getchar=direct.getchar
+nuts.setchar=direct.setchar
+nuts.getdisc=direct.getdisc
+nuts.setdisc=direct.setdisc
+nuts.setlink=direct.setlink
+nuts.getlist=direct.getlist
+nuts.setlist=direct.setlist
+nuts.getoffsets=direct.getoffsets or
+  function(n)
+    return getfield(n,"xoffset"),getfield(n,"yoffset")
+  end
+nuts.setoffsets=direct.setoffsets or
+  function(n,x,y)
+    if x then setfield(n,"xoffset",x) end
+    if y then setfield(n,"xoffset",y) end
+  end
+nuts.getleader=direct.getleader   or function(n)  return getfield(n,"leader")    end
+nuts.setleader=direct.setleader   or function(n,l)    setfield(n,"leader",l)   end
+nuts.getcomponents=direct.getcomponents or function(n)  return getfield(n,"components")  end
+nuts.setcomponents=direct.setcomponents or function(n,c)    setfield(n,"components",c) end
+nuts.getkern=direct.getkern    or function(n)  return getfield(n,"kern")     end
+nuts.setkern=direct.setkern    or function(n,k)    setfield(n,"kern",k)    end
+nuts.getdir=direct.getdir    or function(n)  return getfield(n,"dir")     end
+nuts.setdir=direct.setdir    or function(n,d)    setfield(n,"dir",d)    end
+nuts.getwidth=direct.getwidth   or function(n)  return getfield(n,"width")    end
+nuts.setwidth=direct.setwidth   or function(n,w) return setfield(n,"width",w)   end
+nuts.getheight=direct.getheight   or function(n)  return getfield(n,"height")    end
+nuts.setheight=direct.setheight   or function(n,h) return setfield(n,"height",h)   end
+nuts.getdepth=direct.getdepth   or function(n)  return getfield(n,"depth")    end
+nuts.setdepth=direct.setdepth   or function(n,d) return setfield(n,"depth",d)   end
+if not direct.is_glyph then
+  local getchar=direct.getchar
+  local getid=direct.getid
+  local getfont=direct.getfont
+  local glyph_code=nodes.nodecodes.glyph
+  function direct.is_glyph(n,f)
+    local id=getid(n)
+    if id==glyph_code then
+      if f and getfont(n)==f then
+        return getchar(n)
+      else
+        return false
+      end
+    else
+      return nil,id
+    end
+  end
+  function direct.is_char(n,f)
+    local id=getid(n)
+    if id==glyph_code then
+      if getsubtype(n)>=256 then
+        return false
+      elseif f and getfont(n)==f then
+        return getchar(n)
+      else
+        return false
+      end
+    else
+      return nil,id
+    end
+  end
+end
+nuts.ischar=direct.is_char
+nuts.is_char=direct.is_char
+nuts.isglyph=direct.is_glyph
+nuts.is_glyph=direct.is_glyph
+nuts.insert_before=direct.insert_before
+nuts.insert_after=direct.insert_after
+nuts.delete=direct.delete
+nuts.copy=direct.copy
+nuts.copy_node=direct.copy
+nuts.copy_list=direct.copy_list
+nuts.tail=direct.tail
+nuts.flush_list=direct.flush_list
+nuts.flush_node=direct.flush_node
+nuts.flush=direct.flush
+nuts.free=direct.free
+nuts.remove=direct.remove
+nuts.is_node=direct.is_node
+nuts.end_of_math=direct.end_of_math
+nuts.traverse=direct.traverse
+nuts.traverse_id=direct.traverse_id
+nuts.traverse_char=direct.traverse_char
+nuts.ligaturing=direct.ligaturing
+nuts.kerning=direct.kerning
+nuts.new=direct.new
+nuts.getprop=nuts.getattr
+nuts.setprop=nuts.setattr
+local propertydata=direct.get_properties_table()
+nodes.properties={ data=propertydata }
+direct.set_properties_mode(true,true)   
+function direct.set_properties_mode() end 
+nuts.getprop=function(n,k)
+  local p=propertydata[n]
+  if p then
+    return p[k]
+  end
+end
+nuts.setprop=function(n,k,v)
+  if v then
+    local p=propertydata[n]
+    if p then
+      p[k]=v
+    else
+      propertydata[n]={ [k]=v }
+    end
+  end
+end
+nodes.setprop=nodes.setproperty
+nodes.getprop=nodes.getproperty
+local setprev=nuts.setprev
+local setnext=nuts.setnext
+local getnext=nuts.getnext
+local setlink=nuts.setlink
+local getfield=nuts.getfield
+local setfield=nuts.setfield
+local getcomponents=nuts.getcomponents
+local setcomponents=nuts.setcomponents
+local find_tail=nuts.tail
+local flush_list=nuts.flush_list
+local flush_node=nuts.flush_node
+local traverse_id=nuts.traverse_id
+local copy_node=nuts.copy_node
+local glyph_code=nodes.nodecodes.glyph
+function nuts.set_components(target,start,stop)
+  local head=getcomponents(target)
+  if head then
+    flush_list(head)
+    head=nil
+  end
+  if start then
+    setprev(start)
+  else
+    return nil
+  end
+  if stop then
+    setnext(stop)
+  end
+  local tail=nil
+  while start do
+    local c=getcomponents(start)
+    local n=getnext(start)
+    if c then
+      if head then
+        setlink(tail,c)
+      else
+        head=c
+      end
+      tail=find_tail(c)
+      setcomponents(start)
+      flush_node(start)
+    else
+      if head then
+        setlink(tail,start)
+      else
+        head=start
+      end
+      tail=start
+    end
+    start=n
+  end
+  setcomponents(target,head)
+  return head
+end
+nuts.get_components=nuts.getcomponents
+function nuts.take_components(target)
+  local c=getcomponents(target)
+  setcomponents(target)
+  return c
+end
+function nuts.count_components(n,marks)
+  local components=getcomponents(n)
+  if components then
+    if marks then
+      local i=0
+      for g in traverse_id(glyph_code,components) do
+        if not marks[getchar(g)] then
+          i=i+1
+        end
+      end
+      return i
+    else
+      return count(glyph_code,components)
+    end
+  else
+    return 0
+  end
+end
+function nuts.copy_no_components(g,copyinjection)
+  local components=getcomponents(g)
+  if components then
+    setcomponents(g)
+    local n=copy_node(g)
+    if copyinjection then
+      copyinjection(n,g)
+    end
+    setcomponents(g,components)
+    return n
+  else
+    local n=copy_node(g)
+    if copyinjection then
+      copyinjection(n,g)
+    end
+    return n
+  end
+end
+function nuts.copy_only_glyphs(current)
+  local head=nil
+  local previous=nil
+  for n in traverse_id(glyph_code,current) do
+    n=copy_node(n)
+    if head then
+      setlink(previous,n)
+    else
+      head=n
+    end
+    previous=n
+  end
+  return head
+end
+nuts.uses_font=direct.uses_font
+if not nuts.uses_font then
+  local getdisc=nuts.getdisc
+  local getfont=nuts.getfont
+  function nuts.uses_font(n,font)
+    local pre,post,replace=getdisc(n)
+    if pre then
+      for n in traverse_id(glyph_code,pre) do
+        if getfont(n)==font then
+          return true
+        end
+      end
+    end
+    if post then
+      for n in traverse_id(glyph_code,post) do
+        if getfont(n)==font then
+          return true
+        end
+      end
+    end
+    if replace then
+      for n in traverse_id(glyph_code,replace) do
+        if getfont(n)==font then
+          return true
+        end
+      end
+    end
+    return false
+  end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+
+characters=characters or {}
+characters.blockrange={}
+characters.classifiers={
+ [768]=5,
+ [769]=5,
+ [770]=5,
+ [771]=5,
+ [772]=5,
+ [773]=5,
+ [774]=5,
+ [775]=5,
+ [776]=5,
+ [777]=5,
+ [778]=5,
+ [779]=5,
+ [780]=5,
+ [781]=5,
+ [782]=5,
+ [783]=5,
+ [784]=5,
+ [785]=5,
+ [786]=5,
+ [787]=5,
+ [788]=5,
+ [789]=5,
+ [790]=5,
+ [791]=5,
+ [792]=5,
+ [793]=5,
+ [794]=5,
+ [795]=5,
+ [796]=5,
+ [797]=5,
+ [798]=5,
+ [799]=5,
+ [800]=5,
+ [801]=5,
+ [802]=5,
+ [803]=5,
+ [804]=5,
+ [805]=5,
+ [806]=5,
+ [807]=5,
+ [808]=5,
+ [809]=5,
+ [810]=5,
+ [811]=5,
+ [812]=5,
+ [813]=5,
+ [814]=5,
+ [815]=5,
+ [816]=5,
+ [817]=5,
+ [818]=5,
+ [819]=5,
+ [820]=5,
+ [821]=5,
+ [822]=5,
+ [823]=5,
+ [824]=5,
+ [825]=5,
+ [826]=5,
+ [827]=5,
+ [828]=5,
+ [829]=5,
+ [830]=5,
+ [831]=5,
+ [832]=5,
+ [833]=5,
+ [834]=5,
+ [835]=5,
+ [836]=5,
+ [837]=5,
+ [838]=5,
+ [839]=5,
+ [840]=5,
+ [841]=5,
+ [842]=5,
+ [843]=5,
+ [844]=5,
+ [845]=5,
+ [846]=5,
+ [847]=5,
+ [848]=5,
+ [849]=5,
+ [850]=5,
+ [851]=5,
+ [852]=5,
+ [853]=5,
+ [854]=5,
+ [855]=5,
+ [856]=5,
+ [857]=5,
+ [858]=5,
+ [859]=5,
+ [860]=5,
+ [861]=5,
+ [862]=5,
+ [863]=5,
+ [864]=5,
+ [865]=5,
+ [866]=5,
+ [867]=5,
+ [868]=5,
+ [869]=5,
+ [870]=5,
+ [871]=5,
+ [872]=5,
+ [873]=5,
+ [874]=5,
+ [875]=5,
+ [876]=5,
+ [877]=5,
+ [878]=5,
+ [879]=5,
+ [1155]=5,
+ [1156]=5,
+ [1157]=5,
+ [1158]=5,
+ [1159]=5,
+ [1425]=5,
+ [1426]=5,
+ [1427]=5,
+ [1428]=5,
+ [1429]=5,
+ [1430]=5,
+ [1431]=5,
+ [1432]=5,
+ [1433]=5,
+ [1434]=5,
+ [1435]=5,
+ [1436]=5,
+ [1437]=5,
+ [1438]=5,
+ [1439]=5,
+ [1440]=5,
+ [1441]=5,
+ [1442]=5,
+ [1443]=5,
+ [1444]=5,
+ [1445]=5,
+ [1446]=5,
+ [1447]=5,
+ [1448]=5,
+ [1449]=5,
+ [1450]=5,
+ [1451]=5,
+ [1452]=5,
+ [1453]=5,
+ [1454]=5,
+ [1455]=5,
+ [1456]=5,
+ [1457]=5,
+ [1458]=5,
+ [1459]=5,
+ [1460]=5,
+ [1461]=5,
+ [1462]=5,
+ [1463]=5,
+ [1464]=5,
+ [1465]=5,
+ [1466]=5,
+ [1467]=5,
+ [1468]=5,
+ [1469]=5,
+ [1471]=5,
+ [1473]=5,
+ [1474]=5,
+ [1476]=5,
+ [1477]=5,
+ [1479]=5,
+ [1536]=4,
+ [1537]=4,
+ [1538]=4,
+ [1539]=4,
+ [1540]=4,
+ [1541]=4,
+ [1542]=6,
+ [1543]=6,
+ [1544]=4,
+ [1545]=6,
+ [1546]=6,
+ [1547]=4,
+ [1548]=6,
+ [1549]=6,
+ [1550]=6,
+ [1551]=6,
+ [1552]=5,
+ [1553]=5,
+ [1554]=5,
+ [1555]=5,
+ [1556]=5,
+ [1557]=5,
+ [1558]=5,
+ [1559]=5,
+ [1560]=5,
+ [1561]=5,
+ [1562]=5,
+ [1563]=6,
+ [1564]=6,
+ [1566]=6,
+ [1567]=6,
+ [1568]=2,
+ [1569]=4,
+ [1570]=3,
+ [1571]=3,
+ [1572]=3,
+ [1573]=3,
+ [1574]=2,
+ [1575]=3,
+ [1576]=2,
+ [1577]=3,
+ [1578]=2,
+ [1579]=2,
+ [1580]=2,
+ [1581]=2,
+ [1582]=2,
+ [1583]=3,
+ [1584]=3,
+ [1585]=3,
+ [1586]=3,
+ [1587]=2,
+ [1588]=2,
+ [1589]=2,
+ [1590]=2,
+ [1591]=2,
+ [1592]=2,
+ [1593]=2,
+ [1594]=2,
+ [1595]=2,
+ [1596]=2,
+ [1597]=2,
+ [1598]=2,
+ [1599]=2,
+ [1600]=2,
+ [1601]=2,
+ [1602]=2,
+ [1603]=2,
+ [1604]=2,
+ [1605]=2,
+ [1606]=2,
+ [1607]=2,
+ [1608]=3,
+ [1609]=2,
+ [1610]=2,
+ [1611]=5,
+ [1612]=5,
+ [1613]=5,
+ [1614]=5,
+ [1615]=5,
+ [1616]=5,
+ [1617]=5,
+ [1618]=5,
+ [1619]=5,
+ [1620]=5,
+ [1621]=5,
+ [1622]=5,
+ [1623]=5,
+ [1624]=5,
+ [1625]=5,
+ [1626]=5,
+ [1627]=5,
+ [1628]=5,
+ [1629]=5,
+ [1630]=5,
+ [1631]=5,
+ [1632]=6,
+ [1633]=6,
+ [1634]=6,
+ [1635]=6,
+ [1636]=6,
+ [1637]=6,
+ [1638]=6,
+ [1639]=6,
+ [1640]=6,
+ [1641]=6,
+ [1642]=6,
+ [1643]=6,
+ [1644]=6,
+ [1645]=6,
+ [1646]=2,
+ [1647]=2,
+ [1648]=5,
+ [1649]=3,
+ [1650]=3,
+ [1651]=3,
+ [1652]=4,
+ [1653]=3,
+ [1654]=3,
+ [1655]=3,
+ [1656]=2,
+ [1657]=2,
+ [1658]=2,
+ [1659]=2,
+ [1660]=2,
+ [1661]=2,
+ [1662]=2,
+ [1663]=2,
+ [1664]=2,
+ [1665]=2,
+ [1666]=2,
+ [1667]=2,
+ [1668]=2,
+ [1669]=2,
+ [1670]=2,
+ [1671]=2,
+ [1672]=3,
+ [1673]=3,
+ [1674]=3,
+ [1675]=3,
+ [1676]=3,
+ [1677]=3,
+ [1678]=3,
+ [1679]=3,
+ [1680]=3,
+ [1681]=3,
+ [1682]=3,
+ [1683]=3,
+ [1684]=3,
+ [1685]=3,
+ [1686]=3,
+ [1687]=3,
+ [1688]=3,
+ [1689]=3,
+ [1690]=2,
+ [1691]=2,
+ [1692]=2,
+ [1693]=2,
+ [1694]=2,
+ [1695]=2,
+ [1696]=2,
+ [1697]=2,
+ [1698]=2,
+ [1699]=2,
+ [1700]=2,
+ [1701]=2,
+ [1702]=2,
+ [1703]=2,
+ [1704]=2,
+ [1705]=2,
+ [1706]=2,
+ [1707]=2,
+ [1708]=2,
+ [1709]=2,
+ [1710]=2,
+ [1711]=2,
+ [1712]=2,
+ [1713]=2,
+ [1714]=2,
+ [1715]=2,
+ [1716]=2,
+ [1717]=2,
+ [1718]=2,
+ [1719]=2,
+ [1720]=2,
+ [1721]=2,
+ [1722]=2,
+ [1723]=2,
+ [1724]=2,
+ [1725]=2,
+ [1726]=2,
+ [1727]=2,
+ [1728]=3,
+ [1729]=2,
+ [1730]=2,
+ [1731]=3,
+ [1732]=3,
+ [1733]=3,
+ [1734]=3,
+ [1735]=3,
+ [1736]=3,
+ [1737]=3,
+ [1738]=3,
+ [1739]=3,
+ [1740]=2,
+ [1741]=3,
+ [1742]=2,
+ [1743]=3,
+ [1744]=2,
+ [1745]=2,
+ [1746]=3,
+ [1747]=3,
+ [1748]=6,
+ [1749]=3,
+ [1750]=5,
+ [1751]=5,
+ [1752]=5,
+ [1753]=5,
+ [1754]=5,
+ [1755]=5,
+ [1756]=5,
+ [1757]=4,
+ [1758]=6,
+ [1759]=5,
+ [1760]=5,
+ [1761]=5,
+ [1762]=5,
+ [1763]=5,
+ [1764]=5,
+ [1765]=6,
+ [1766]=6,
+ [1767]=5,
+ [1768]=5,
+ [1769]=6,
+ [1770]=5,
+ [1771]=5,
+ [1772]=5,
+ [1773]=5,
+ [1774]=3,
+ [1775]=3,
+ [1776]=6,
+ [1777]=6,
+ [1778]=6,
+ [1779]=6,
+ [1780]=6,
+ [1781]=6,
+ [1782]=6,
+ [1783]=6,
+ [1784]=6,
+ [1785]=6,
+ [1786]=2,
+ [1787]=2,
+ [1788]=2,
+ [1789]=6,
+ [1790]=6,
+ [1791]=2,
+ [1792]=6,
+ [1793]=6,
+ [1794]=6,
+ [1795]=6,
+ [1796]=6,
+ [1797]=6,
+ [1798]=6,
+ [1799]=6,
+ [1800]=6,
+ [1801]=6,
+ [1802]=6,
+ [1803]=6,
+ [1804]=6,
+ [1805]=6,
+ [1807]=6,
+ [1808]=3,
+ [1809]=5,
+ [1810]=2,
+ [1811]=2,
+ [1812]=2,
+ [1813]=3,
+ [1814]=3,
+ [1815]=3,
+ [1816]=3,
+ [1817]=3,
+ [1818]=2,
+ [1819]=2,
+ [1820]=2,
+ [1821]=2,
+ [1822]=3,
+ [1823]=2,
+ [1824]=2,
+ [1825]=2,
+ [1826]=2,
+ [1827]=2,
+ [1828]=2,
+ [1829]=2,
+ [1830]=2,
+ [1831]=2,
+ [1832]=3,
+ [1833]=2,
+ [1834]=3,
+ [1835]=2,
+ [1836]=3,
+ [1837]=2,
+ [1838]=2,
+ [1839]=3,
+ [1840]=5,
+ [1841]=5,
+ [1842]=5,
+ [1843]=5,
+ [1844]=5,
+ [1845]=5,
+ [1846]=5,
+ [1847]=5,
+ [1848]=5,
+ [1849]=5,
+ [1850]=5,
+ [1851]=5,
+ [1852]=5,
+ [1853]=5,
+ [1854]=5,
+ [1855]=5,
+ [1856]=5,
+ [1857]=5,
+ [1858]=5,
+ [1859]=5,
+ [1860]=5,
+ [1861]=5,
+ [1862]=5,
+ [1863]=5,
+ [1864]=5,
+ [1865]=5,
+ [1866]=5,
+ [1869]=3,
+ [1870]=2,
+ [1871]=2,
+ [1872]=2,
+ [1873]=2,
+ [1874]=2,
+ [1875]=2,
+ [1876]=2,
+ [1877]=2,
+ [1878]=2,
+ [1879]=2,
+ [1880]=2,
+ [1881]=3,
+ [1882]=3,
+ [1883]=3,
+ [1884]=2,
+ [1885]=2,
+ [1886]=2,
+ [1887]=2,
+ [1888]=2,
+ [1889]=2,
+ [1890]=2,
+ [1891]=2,
+ [1892]=2,
+ [1893]=2,
+ [1894]=2,
+ [1895]=2,
+ [1896]=2,
+ [1897]=2,
+ [1898]=2,
+ [1899]=3,
+ [1900]=3,
+ [1901]=2,
+ [1902]=2,
+ [1903]=2,
+ [1904]=2,
+ [1905]=3,
+ [1906]=2,
+ [1907]=3,
+ [1908]=3,
+ [1909]=2,
+ [1910]=2,
+ [1911]=2,
+ [1912]=3,
+ [1913]=3,
+ [1914]=2,
+ [1915]=2,
+ [1916]=2,
+ [1917]=2,
+ [1918]=2,
+ [1919]=2,
+ [1958]=5,
+ [1959]=5,
+ [1960]=5,
+ [1961]=5,
+ [1962]=5,
+ [1963]=5,
+ [1964]=5,
+ [1965]=5,
+ [1966]=5,
+ [1967]=5,
+ [1968]=5,
+ [1984]=6,
+ [1985]=6,
+ [1986]=6,
+ [1987]=6,
+ [1988]=6,
+ [1989]=6,
+ [1990]=6,
+ [1991]=6,
+ [1992]=6,
+ [1993]=6,
+ [1994]=2,
+ [1995]=2,
+ [1996]=2,
+ [1997]=2,
+ [1998]=2,
+ [1999]=2,
+ [2000]=2,
+ [2001]=2,
+ [2002]=2,
+ [2003]=2,
+ [2004]=2,
+ [2005]=2,
+ [2006]=2,
+ [2007]=2,
+ [2008]=2,
+ [2009]=2,
+ [2010]=2,
+ [2011]=2,
+ [2012]=2,
+ [2013]=2,
+ [2014]=2,
+ [2015]=2,
+ [2016]=2,
+ [2017]=2,
+ [2018]=2,
+ [2019]=2,
+ [2020]=2,
+ [2021]=2,
+ [2022]=2,
+ [2023]=2,
+ [2024]=2,
+ [2025]=2,
+ [2026]=2,
+ [2027]=5,
+ [2028]=5,
+ [2029]=5,
+ [2030]=5,
+ [2031]=5,
+ [2032]=5,
+ [2033]=5,
+ [2034]=5,
+ [2035]=5,
+ [2036]=6,
+ [2037]=6,
+ [2038]=6,
+ [2039]=6,
+ [2040]=6,
+ [2041]=6,
+ [2042]=2,
+ [2070]=5,
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+ [2073]=5,
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+ [2086]=5,
+ [2087]=5,
+ [2089]=5,
+ [2090]=5,
+ [2091]=5,
+ [2092]=5,
+ [2093]=5,
+ [2112]=3,
+ [2113]=2,
+ [2114]=2,
+ [2115]=2,
+ [2116]=2,
+ [2117]=2,
+ [2118]=3,
+ [2119]=3,
+ [2120]=2,
+ [2121]=3,
+ [2122]=2,
+ [2123]=2,
+ [2124]=2,
+ [2125]=2,
+ [2126]=2,
+ [2127]=2,
+ [2128]=2,
+ [2129]=2,
+ [2130]=2,
+ [2131]=2,
+ [2132]=3,
+ [2133]=2,
+ [2134]=4,
+ [2135]=4,
+ [2136]=4,
+ [2137]=5,
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+ [2208]=2,
+ [2209]=2,
+ [2210]=2,
+ [2211]=2,
+ [2212]=2,
+ [2213]=2,
+ [2214]=2,
+ [2215]=2,
+ [2216]=2,
+ [2217]=2,
+ [2218]=3,
+ [2219]=3,
+ [2220]=3,
+ [2221]=4,
+ [2222]=3,
+ [2223]=2,
+ [2224]=2,
+ [2225]=3,
+ [2226]=3,
+ [2227]=2,
+ [2228]=2,
+ [2230]=2,
+ [2231]=2,
+ [2232]=2,
+ [2233]=3,
+ [2234]=2,
+ [2235]=2,
+ [2236]=2,
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+ [2260]=5,
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+ [2274]=4,
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+ [6299]=2,
+ [6300]=2,
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+ [6313]=5,
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+ [7664]=5,
+ [7665]=5,
+ [7666]=5,
+ [7667]=5,
+ [7668]=5,
+ [7669]=5,
+ [7675]=5,
+ [7676]=5,
+ [7677]=5,
+ [7678]=5,
+ [7679]=5,
+ [8204]=4,
+ [8205]=2,
+ [8239]=4,
+ [8294]=4,
+ [8295]=4,
+ [8296]=4,
+ [8297]=4,
+ [8400]=5,
+ [8401]=5,
+ [8402]=5,
+ [8403]=5,
+ [8404]=5,
+ [8405]=5,
+ [8406]=5,
+ [8407]=5,
+ [8408]=5,
+ [8409]=5,
+ [8410]=5,
+ [8411]=5,
+ [8412]=5,
+ [8417]=5,
+ [8421]=5,
+ [8422]=5,
+ [8423]=5,
+ [8424]=5,
+ [8425]=5,
+ [8426]=5,
+ [8427]=5,
+ [8428]=5,
+ [8429]=5,
+ [8430]=5,
+ [8431]=5,
+ [8432]=5,
+ [11503]=5,
+ [11504]=5,
+ [11505]=5,
+ [11647]=5,
+ [11744]=5,
+ [11745]=5,
+ [11746]=5,
+ [11747]=5,
+ [11748]=5,
+ [11749]=5,
+ [11750]=5,
+ [11751]=5,
+ [11752]=5,
+ [11753]=5,
+ [11754]=5,
+ [11755]=5,
+ [11756]=5,
+ [11757]=5,
+ [11758]=5,
+ [11759]=5,
+ [11760]=5,
+ [11761]=5,
+ [11762]=5,
+ [11763]=5,
+ [11764]=5,
+ [11765]=5,
+ [11766]=5,
+ [11767]=5,
+ [11768]=5,
+ [11769]=5,
+ [11770]=5,
+ [11771]=5,
+ [11772]=5,
+ [11773]=5,
+ [11774]=5,
+ [11775]=5,
+ [12330]=5,
+ [12331]=5,
+ [12332]=5,
+ [12333]=5,
+ [12334]=5,
+ [12335]=5,
+ [12441]=5,
+ [12442]=5,
+ [42607]=5,
+ [42612]=5,
+ [42613]=5,
+ [42614]=5,
+ [42615]=5,
+ [42616]=5,
+ [42617]=5,
+ [42618]=5,
+ [42619]=5,
+ [42620]=5,
+ [42621]=5,
+ [42654]=5,
+ [42655]=5,
+ [42736]=5,
+ [42737]=5,
+ [43014]=5,
+ [43019]=5,
+ [43045]=5,
+ [43046]=5,
+ [43072]=2,
+ [43073]=2,
+ [43074]=2,
+ [43075]=2,
+ [43076]=2,
+ [43077]=2,
+ [43078]=2,
+ [43079]=2,
+ [43080]=2,
+ [43081]=2,
+ [43082]=2,
+ [43083]=2,
+ [43084]=2,
+ [43085]=2,
+ [43086]=2,
+ [43087]=2,
+ [43088]=2,
+ [43089]=2,
+ [43090]=2,
+ [43091]=2,
+ [43092]=2,
+ [43093]=2,
+ [43094]=2,
+ [43095]=2,
+ [43096]=2,
+ [43097]=2,
+ [43098]=2,
+ [43099]=2,
+ [43100]=2,
+ [43101]=2,
+ [43102]=2,
+ [43103]=2,
+ [43104]=2,
+ [43105]=2,
+ [43106]=2,
+ [43107]=2,
+ [43108]=2,
+ [43109]=2,
+ [43110]=2,
+ [43111]=2,
+ [43112]=2,
+ [43113]=2,
+ [43114]=2,
+ [43115]=2,
+ [43116]=2,
+ [43117]=2,
+ [43118]=2,
+ [43119]=2,
+ [43120]=2,
+ [43121]=2,
+ [43122]=1,
+ [43123]=4,
+ [43204]=5,
+ [43205]=5,
+ [43232]=5,
+ [43233]=5,
+ [43234]=5,
+ [43235]=5,
+ [43236]=5,
+ [43237]=5,
+ [43238]=5,
+ [43239]=5,
+ [43240]=5,
+ [43241]=5,
+ [43242]=5,
+ [43243]=5,
+ [43244]=5,
+ [43245]=5,
+ [43246]=5,
+ [43247]=5,
+ [43248]=5,
+ [43249]=5,
+ [43302]=5,
+ [43303]=5,
+ [43304]=5,
+ [43305]=5,
+ [43306]=5,
+ [43307]=5,
+ [43308]=5,
+ [43309]=5,
+ [43335]=5,
+ [43336]=5,
+ [43337]=5,
+ [43338]=5,
+ [43339]=5,
+ [43340]=5,
+ [43341]=5,
+ [43342]=5,
+ [43343]=5,
+ [43344]=5,
+ [43345]=5,
+ [43392]=5,
+ [43393]=5,
+ [43394]=5,
+ [43443]=5,
+ [43446]=5,
+ [43447]=5,
+ [43448]=5,
+ [43449]=5,
+ [43452]=5,
+ [43493]=5,
+ [43561]=5,
+ [43562]=5,
+ [43563]=5,
+ [43564]=5,
+ [43565]=5,
+ [43566]=5,
+ [43569]=5,
+ [43570]=5,
+ [43573]=5,
+ [43574]=5,
+ [43587]=5,
+ [43596]=5,
+ [43644]=5,
+ [43696]=5,
+ [43698]=5,
+ [43699]=5,
+ [43700]=5,
+ [43703]=5,
+ [43704]=5,
+ [43710]=5,
+ [43711]=5,
+ [43713]=5,
+ [43756]=5,
+ [43757]=5,
+ [43766]=5,
+ [44005]=5,
+ [44008]=5,
+ [44013]=5,
+ [64286]=5,
+ [65056]=5,
+ [65057]=5,
+ [65058]=5,
+ [65059]=5,
+ [65060]=5,
+ [65061]=5,
+ [65062]=5,
+ [65063]=5,
+ [65064]=5,
+ [65065]=5,
+ [65066]=5,
+ [65067]=5,
+ [65068]=5,
+ [65069]=5,
+ [65070]=5,
+ [65071]=5,
+ [66045]=5,
+ [66272]=5,
+ [66422]=5,
+ [66423]=5,
+ [66424]=5,
+ [66425]=5,
+ [66426]=5,
+ [68097]=5,
+ [68098]=5,
+ [68099]=5,
+ [68101]=5,
+ [68102]=5,
+ [68108]=5,
+ [68109]=5,
+ [68110]=5,
+ [68111]=5,
+ [68152]=5,
+ [68153]=5,
+ [68154]=5,
+ [68159]=5,
+ [68288]=2,
+ [68289]=2,
+ [68290]=2,
+ [68291]=2,
+ [68292]=2,
+ [68293]=3,
+ [68294]=4,
+ [68295]=3,
+ [68296]=4,
+ [68297]=3,
+ [68298]=3,
+ [68299]=4,
+ [68300]=4,
+ [68301]=1,
+ [68302]=3,
+ [68303]=3,
+ [68304]=3,
+ [68305]=3,
+ [68306]=3,
+ [68307]=2,
+ [68308]=2,
+ [68309]=2,
+ [68310]=2,
+ [68311]=1,
+ [68312]=2,
+ [68313]=2,
+ [68314]=2,
+ [68315]=2,
+ [68316]=2,
+ [68317]=3,
+ [68318]=2,
+ [68319]=2,
+ [68320]=2,
+ [68321]=3,
+ [68322]=4,
+ [68323]=4,
+ [68324]=3,
+ [68325]=5,
+ [68326]=5,
+ [68331]=2,
+ [68332]=2,
+ [68333]=2,
+ [68334]=2,
+ [68335]=3,
+ [68480]=2,
+ [68481]=3,
+ [68482]=2,
+ [68483]=3,
+ [68484]=3,
+ [68485]=3,
+ [68486]=2,
+ [68487]=2,
+ [68488]=2,
+ [68489]=3,
+ [68490]=2,
+ [68491]=2,
+ [68492]=3,
+ [68493]=2,
+ [68494]=3,
+ [68495]=3,
+ [68496]=2,
+ [68497]=3,
+ [68521]=3,
+ [68522]=3,
+ [68523]=3,
+ [68524]=3,
+ [68525]=2,
+ [68526]=2,
+ [68527]=4,
+ [69633]=5,
+ [69688]=5,
+ [69689]=5,
+ [69690]=5,
+ [69691]=5,
+ [69692]=5,
+ [69693]=5,
+ [69694]=5,
+ [69695]=5,
+ [69696]=5,
+ [69697]=5,
+ [69698]=5,
+ [69699]=5,
+ [69700]=5,
+ [69701]=5,
+ [69702]=5,
+ [69759]=5,
+ [69760]=5,
+ [69761]=5,
+ [69811]=5,
+ [69812]=5,
+ [69813]=5,
+ [69814]=5,
+ [69817]=5,
+ [69818]=5,
+ [69888]=5,
+ [69889]=5,
+ [69890]=5,
+ [69927]=5,
+ [69928]=5,
+ [69929]=5,
+ [69930]=5,
+ [69931]=5,
+ [69933]=5,
+ [69934]=5,
+ [69935]=5,
+ [69936]=5,
+ [69937]=5,
+ [69938]=5,
+ [69939]=5,
+ [69940]=5,
+ [70003]=5,
+ [70016]=5,
+ [70017]=5,
+ [70070]=5,
+ [70071]=5,
+ [70072]=5,
+ [70073]=5,
+ [70074]=5,
+ [70075]=5,
+ [70076]=5,
+ [70077]=5,
+ [70078]=5,
+ [70090]=5,
+ [70091]=5,
+ [70092]=5,
+ [70191]=5,
+ [70192]=5,
+ [70193]=5,
+ [70196]=5,
+ [70198]=5,
+ [70199]=5,
+ [70206]=5,
+ [70367]=5,
+ [70371]=5,
+ [70372]=5,
+ [70373]=5,
+ [70374]=5,
+ [70375]=5,
+ [70376]=5,
+ [70377]=5,
+ [70378]=5,
+ [70400]=5,
+ [70401]=5,
+ [70460]=5,
+ [70464]=5,
+ [70502]=5,
+ [70503]=5,
+ [70504]=5,
+ [70505]=5,
+ [70506]=5,
+ [70507]=5,
+ [70508]=5,
+ [70512]=5,
+ [70513]=5,
+ [70514]=5,
+ [70515]=5,
+ [70516]=5,
+ [70712]=5,
+ [70713]=5,
+ [70714]=5,
+ [70715]=5,
+ [70716]=5,
+ [70717]=5,
+ [70718]=5,
+ [70719]=5,
+ [70722]=5,
+ [70723]=5,
+ [70724]=5,
+ [70726]=5,
+ [70835]=5,
+ [70836]=5,
+ [70837]=5,
+ [70838]=5,
+ [70839]=5,
+ [70840]=5,
+ [70842]=5,
+ [70847]=5,
+ [70848]=5,
+ [70850]=5,
+ [70851]=5,
+ [71090]=5,
+ [71091]=5,
+ [71092]=5,
+ [71093]=5,
+ [71100]=5,
+ [71101]=5,
+ [71103]=5,
+ [71104]=5,
+ [71132]=5,
+ [71133]=5,
+ [71219]=5,
+ [71220]=5,
+ [71221]=5,
+ [71222]=5,
+ [71223]=5,
+ [71224]=5,
+ [71225]=5,
+ [71226]=5,
+ [71229]=5,
+ [71231]=5,
+ [71232]=5,
+ [71339]=5,
+ [71341]=5,
+ [71344]=5,
+ [71345]=5,
+ [71346]=5,
+ [71347]=5,
+ [71348]=5,
+ [71349]=5,
+ [71351]=5,
+ [71453]=5,
+ [71454]=5,
+ [71455]=5,
+ [71458]=5,
+ [71459]=5,
+ [71460]=5,
+ [71461]=5,
+ [71463]=5,
+ [71464]=5,
+ [71465]=5,
+ [71466]=5,
+ [71467]=5,
+ [72752]=5,
+ [72753]=5,
+ [72754]=5,
+ [72755]=5,
+ [72756]=5,
+ [72757]=5,
+ [72758]=5,
+ [72760]=5,
+ [72761]=5,
+ [72762]=5,
+ [72763]=5,
+ [72764]=5,
+ [72765]=5,
+ [72767]=5,
+ [72850]=5,
+ [72851]=5,
+ [72852]=5,
+ [72853]=5,
+ [72854]=5,
+ [72855]=5,
+ [72856]=5,
+ [72857]=5,
+ [72858]=5,
+ [72859]=5,
+ [72860]=5,
+ [72861]=5,
+ [72862]=5,
+ [72863]=5,
+ [72864]=5,
+ [72865]=5,
+ [72866]=5,
+ [72867]=5,
+ [72868]=5,
+ [72869]=5,
+ [72870]=5,
+ [72871]=5,
+ [72874]=5,
+ [72875]=5,
+ [72876]=5,
+ [72877]=5,
+ [72878]=5,
+ [72879]=5,
+ [72880]=5,
+ [72882]=5,
+ [72883]=5,
+ [72885]=5,
+ [72886]=5,
+ [92912]=5,
+ [92913]=5,
+ [92914]=5,
+ [92915]=5,
+ [92916]=5,
+ [92976]=5,
+ [92977]=5,
+ [92978]=5,
+ [92979]=5,
+ [92980]=5,
+ [92981]=5,
+ [92982]=5,
+ [94095]=5,
+ [94096]=5,
+ [94097]=5,
+ [94098]=5,
+ [113821]=5,
+ [113822]=5,
+ [119143]=5,
+ [119144]=5,
+ [119145]=5,
+ [119163]=5,
+ [119164]=5,
+ [119165]=5,
+ [119166]=5,
+ [119167]=5,
+ [119168]=5,
+ [119169]=5,
+ [119170]=5,
+ [119173]=5,
+ [119174]=5,
+ [119175]=5,
+ [119176]=5,
+ [119177]=5,
+ [119178]=5,
+ [119179]=5,
+ [119210]=5,
+ [119211]=5,
+ [119212]=5,
+ [119213]=5,
+ [119362]=5,
+ [119363]=5,
+ [119364]=5,
+ [121344]=5,
+ [121345]=5,
+ [121346]=5,
+ [121347]=5,
+ [121348]=5,
+ [121349]=5,
+ [121350]=5,
+ [121351]=5,
+ [121352]=5,
+ [121353]=5,
+ [121354]=5,
+ [121355]=5,
+ [121356]=5,
+ [121357]=5,
+ [121358]=5,
+ [121359]=5,
+ [121360]=5,
+ [121361]=5,
+ [121362]=5,
+ [121363]=5,
+ [121364]=5,
+ [121365]=5,
+ [121366]=5,
+ [121367]=5,
+ [121368]=5,
+ [121369]=5,
+ [121370]=5,
+ [121371]=5,
+ [121372]=5,
+ [121373]=5,
+ [121374]=5,
+ [121375]=5,
+ [121376]=5,
+ [121377]=5,
+ [121378]=5,
+ [121379]=5,
+ [121380]=5,
+ [121381]=5,
+ [121382]=5,
+ [121383]=5,
+ [121384]=5,
+ [121385]=5,
+ [121386]=5,
+ [121387]=5,
+ [121388]=5,
+ [121389]=5,
+ [121390]=5,
+ [121391]=5,
+ [121392]=5,
+ [121393]=5,
+ [121394]=5,
+ [121395]=5,
+ [121396]=5,
+ [121397]=5,
+ [121398]=5,
+ [121403]=5,
+ [121404]=5,
+ [121405]=5,
+ [121406]=5,
+ [121407]=5,
+ [121408]=5,
+ [121409]=5,
+ [121410]=5,
+ [121411]=5,
+ [121412]=5,
+ [121413]=5,
+ [121414]=5,
+ [121415]=5,
+ [121416]=5,
+ [121417]=5,
+ [121418]=5,
+ [121419]=5,
+ [121420]=5,
+ [121421]=5,
+ [121422]=5,
+ [121423]=5,
+ [121424]=5,
+ [121425]=5,
+ [121426]=5,
+ [121427]=5,
+ [121428]=5,
+ [121429]=5,
+ [121430]=5,
+ [121431]=5,
+ [121432]=5,
+ [121433]=5,
+ [121434]=5,
+ [121435]=5,
+ [121436]=5,
+ [121437]=5,
+ [121438]=5,
+ [121439]=5,
+ [121440]=5,
+ [121441]=5,
+ [121442]=5,
+ [121443]=5,
+ [121444]=5,
+ [121445]=5,
+ [121446]=5,
+ [121447]=5,
+ [121448]=5,
+ [121449]=5,
+ [121450]=5,
+ [121451]=5,
+ [121452]=5,
+ [121461]=5,
+ [121476]=5,
+ [121499]=5,
+ [121500]=5,
+ [121501]=5,
+ [121502]=5,
+ [121503]=5,
+ [121505]=5,
+ [121506]=5,
+ [121507]=5,
+ [121508]=5,
+ [121509]=5,
+ [121510]=5,
+ [121511]=5,
+ [121512]=5,
+ [121513]=5,
+ [121514]=5,
+ [121515]=5,
+ [121516]=5,
+ [121517]=5,
+ [121518]=5,
+ [121519]=5,
+ [122880]=5,
+ [122881]=5,
+ [122882]=5,
+ [122883]=5,
+ [122884]=5,
+ [122885]=5,
+ [122886]=5,
+ [122888]=5,
+ [122889]=5,
+ [122890]=5,
+ [122891]=5,
+ [122892]=5,
+ [122893]=5,
+ [122894]=5,
+ [122895]=5,
+ [122896]=5,
+ [122897]=5,
+ [122898]=5,
+ [122899]=5,
+ [122900]=5,
+ [122901]=5,
+ [122902]=5,
+ [122903]=5,
+ [122904]=5,
+ [122907]=5,
+ [122908]=5,
+ [122909]=5,
+ [122910]=5,
+ [122911]=5,
+ [122912]=5,
+ [122913]=5,
+ [122915]=5,
+ [122916]=5,
+ [122918]=5,
+ [122919]=5,
+ [122920]=5,
+ [122921]=5,
+ [122922]=5,
+ [125136]=5,
+ [125137]=5,
+ [125138]=5,
+ [125139]=5,
+ [125140]=5,
+ [125141]=5,
+ [125142]=5,
+ [125184]=2,
+ [125185]=2,
+ [125186]=2,
+ [125187]=2,
+ [125188]=2,
+ [125189]=2,
+ [125190]=2,
+ [125191]=2,
+ [125192]=2,
+ [125193]=2,
+ [125194]=2,
+ [125195]=2,
+ [125196]=2,
+ [125197]=2,
+ [125198]=2,
+ [125199]=2,
+ [125200]=2,
+ [125201]=2,
+ [125202]=2,
+ [125203]=2,
+ [125204]=2,
+ [125205]=2,
+ [125206]=2,
+ [125207]=2,
+ [125208]=2,
+ [125209]=2,
+ [125210]=2,
+ [125211]=2,
+ [125212]=2,
+ [125213]=2,
+ [125214]=2,
+ [125215]=2,
+ [125216]=2,
+ [125217]=2,
+ [125218]=2,
+ [125219]=2,
+ [125220]=2,
+ [125221]=2,
+ [125222]=2,
+ [125223]=2,
+ [125224]=2,
+ [125225]=2,
+ [125226]=2,
+ [125227]=2,
+ [125228]=2,
+ [125229]=2,
+ [125230]=2,
+ [125231]=2,
+ [125232]=2,
+ [125233]=2,
+ [125234]=2,
+ [125235]=2,
+ [125236]=2,
+ [125237]=2,
+ [125238]=2,
+ [125239]=2,
+ [125240]=2,
+ [125241]=2,
+ [125242]=2,
+ [125243]=2,
+ [125244]=2,
+ [125245]=2,
+ [125246]=2,
+ [125247]=2,
+ [125248]=2,
+ [125249]=2,
+ [125250]=2,
+ [125251]=2,
+ [125252]=5,
+ [125253]=5,
+ [125254]=5,
+ [125255]=5,
+ [125256]=5,
+ [125257]=5,
+ [125258]=5,
+ [1042752]=5,
+}
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-ini']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local allocate=utilities.storage.allocate
+fonts=fonts or {}
+local fonts=fonts
+fonts.hashes={ identifiers=allocate() }
+fonts.tables=fonts.tables   or {}
+fonts.helpers=fonts.helpers  or {}
+fonts.tracers=fonts.tracers  or {} 
+fonts.specifiers=fonts.specifiers or {} 
+fonts.analyzers={} 
+fonts.readers={}
+fonts.definers={ methods={} }
+fonts.loggers={ register=function() end }
+if context then
+  fontloader=nil
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-con']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local next,tostring,rawget=next,tostring,rawget
+local format,match,lower,gsub,find=string.format,string.match,string.lower,string.gsub,string.find
+local sort,insert,concat=table.sort,table.insert,table.concat
+local sortedkeys,sortedhash,serialize,fastcopy=table.sortedkeys,table.sortedhash,table.serialize,table.fastcopy
+local derivetable=table.derive
+local ioflush=io.flush
+local trace_defining=false trackers.register("fonts.defining",function(v) trace_defining=v end)
+local trace_scaling=false trackers.register("fonts.scaling",function(v) trace_scaling=v end)
+local report_defining=logs.reporter("fonts","defining")
+local fonts=fonts
+local constructors=fonts.constructors or {}
+fonts.constructors=constructors
+local handlers=fonts.handlers or {} 
+fonts.handlers=handlers
+local allocate=utilities.storage.allocate
+local setmetatableindex=table.setmetatableindex
+constructors.dontembed=allocate()
+constructors.autocleanup=true
+constructors.namemode="fullpath" 
+constructors.version=1.01
+constructors.cache=containers.define("fonts","constructors",constructors.version,false)
+constructors.privateoffset=0xF0000 
+constructors.cacheintex=true
+local designsizes=allocate()
+constructors.designsizes=designsizes
+local loadedfonts=allocate()
+constructors.loadedfonts=loadedfonts
+local factors={
+  pt=65536.0,
+  bp=65781.8,
+}
+function constructors.setfactor(f)
+  constructors.factor=factors[f or 'pt'] or factors.pt
+end
+constructors.setfactor()
+function constructors.scaled(scaledpoints,designsize) 
+  if scaledpoints<0 then
+    local factor=constructors.factor
+    if designsize then
+      if designsize>factor then 
+        return (- scaledpoints/1000)*designsize 
+      else
+        return (- scaledpoints/1000)*designsize*factor
+      end
+    else
+      return (- scaledpoints/1000)*10*factor
+    end
+  else
+    return scaledpoints
+  end
+end
+function constructors.getprivate(tfmdata)
+  local properties=tfmdata.properties
+  local private=properties.private
+  properties.private=private+1
+  return private
+end
+function constructors.cleanuptable(tfmdata)
+  if constructors.autocleanup and tfmdata.properties.virtualized then
+    for k,v in next,tfmdata.characters do
+      if v.commands then v.commands=nil end
+    end
+  end
+end
+function constructors.calculatescale(tfmdata,scaledpoints)
+  local parameters=tfmdata.parameters
+  if scaledpoints<0 then
+    scaledpoints=(- scaledpoints/1000)*(tfmdata.designsize or parameters.designsize) 
+  end
+  return scaledpoints,scaledpoints/(parameters.units or 1000) 
+end
+local unscaled={
+  ScriptPercentScaleDown=true,
+  ScriptScriptPercentScaleDown=true,
+  RadicalDegreeBottomRaisePercent=true,
+  NoLimitSupFactor=true,
+  NoLimitSubFactor=true,
+}
+function constructors.assignmathparameters(target,original)
+  local mathparameters=original.mathparameters
+  if mathparameters and next(mathparameters) then
+    local targetparameters=target.parameters
+    local targetproperties=target.properties
+    local targetmathparameters={}
+    local factor=targetproperties.math_is_scaled and 1 or targetparameters.factor
+    for name,value in next,mathparameters do
+      if unscaled[name] then
+        targetmathparameters[name]=value
+      else
+        targetmathparameters[name]=value*factor
+      end
+    end
+    if not targetmathparameters.FractionDelimiterSize then
+      targetmathparameters.FractionDelimiterSize=1.01*targetparameters.size
+    end
+    if not mathparameters.FractionDelimiterDisplayStyleSize then
+      targetmathparameters.FractionDelimiterDisplayStyleSize=2.40*targetparameters.size
+    end
+    target.mathparameters=targetmathparameters
+  end
+end
+function constructors.beforecopyingcharacters(target,original)
+end
+function constructors.aftercopyingcharacters(target,original)
+end
+constructors.sharefonts=false
+constructors.nofsharedfonts=0
+local sharednames={}
+function constructors.trytosharefont(target,tfmdata)
+  if constructors.sharefonts then 
+    local characters=target.characters
+    local n=1
+    local t={ target.psname }
+    local u=sortedkeys(characters)
+    for i=1,#u do
+      local k=u[i]
+      n=n+1;t[n]=k
+      n=n+1;t[n]=characters[k].index or k
+    end
+    local h=md5.HEX(concat(t," "))
+    local s=sharednames[h]
+    if s then
+      if trace_defining then
+        report_defining("font %a uses backend resources of font %a",target.fullname,s)
+      end
+      target.fullname=s
+      constructors.nofsharedfonts=constructors.nofsharedfonts+1
+      target.properties.sharedwith=s
+    else
+      sharednames[h]=target.fullname
+    end
+  end
+end
+function constructors.enhanceparameters(parameters)
+  local xheight=parameters.x_height
+  local quad=parameters.quad
+  local space=parameters.space
+  local stretch=parameters.space_stretch
+  local shrink=parameters.space_shrink
+  local extra=parameters.extra_space
+  local slant=parameters.slant
+  parameters.xheight=xheight
+  parameters.spacestretch=stretch
+  parameters.spaceshrink=shrink
+  parameters.extraspace=extra
+  parameters.em=quad
+  parameters.ex=xheight
+  parameters.slantperpoint=slant
+  parameters.spacing={
+    width=space,
+    stretch=stretch,
+    shrink=shrink,
+    extra=extra,
+  }
+end
+local function mathkerns(v,vdelta)
+  local k={}
+  for i=1,#v do
+    local entry=v[i]
+    local height=entry.height
+    local kern=entry.kern
+    k[i]={
+      height=height and vdelta*height or 0,
+      kern=kern  and vdelta*kern  or 0,
+    }
+  end
+  return k
+end
+local psfake=0
+local function fixedpsname(psname,fallback)
+  local usedname=psname
+  if psname and psname~="" then
+    if find(psname," ") then
+      usedname=gsub(psname,"[%s]+","-")
+    else
+    end
+  elseif not fallback or fallback=="" then
+    psfake=psfake+1
+    psname="fakename-"..psfake
+  else
+    psname=fallback
+    usedname=gsub(psname,"[^a-zA-Z0-9]+","-")
+  end
+  return usedname,psname~=usedname
+end
+function constructors.scale(tfmdata,specification)
+  local target={}
+  if tonumber(specification) then
+    specification={ size=specification }
+  end
+  target.specification=specification
+  local scaledpoints=specification.size
+  local relativeid=specification.relativeid
+  local properties=tfmdata.properties   or {}
+  local goodies=tfmdata.goodies    or {}
+  local resources=tfmdata.resources   or {}
+  local descriptions=tfmdata.descriptions  or {} 
+  local characters=tfmdata.characters   or {} 
+  local changed=tfmdata.changed    or {} 
+  local shared=tfmdata.shared     or {}
+  local parameters=tfmdata.parameters   or {}
+  local mathparameters=tfmdata.mathparameters or {}
+  local targetcharacters={}
+  local targetdescriptions=derivetable(descriptions)
+  local targetparameters=derivetable(parameters)
+  local targetproperties=derivetable(properties)
+  local targetgoodies=goodies            
+  target.characters=targetcharacters
+  target.descriptions=targetdescriptions
+  target.parameters=targetparameters
+  target.properties=targetproperties
+  target.goodies=targetgoodies
+  target.shared=shared
+  target.resources=resources
+  target.unscaled=tfmdata
+  local mathsize=tonumber(specification.mathsize) or 0
+  local textsize=tonumber(specification.textsize) or scaledpoints
+  local forcedsize=tonumber(parameters.mathsize  ) or 0 
+  local extrafactor=tonumber(specification.factor ) or 1
+  if (mathsize==2 or forcedsize==2) and parameters.scriptpercentage then
+    scaledpoints=parameters.scriptpercentage*textsize/100
+  elseif (mathsize==3 or forcedsize==3) and parameters.scriptscriptpercentage then
+    scaledpoints=parameters.scriptscriptpercentage*textsize/100
+  elseif forcedsize>1000 then 
+    scaledpoints=forcedsize
+  else
+  end
+  targetparameters.mathsize=mathsize  
+  targetparameters.textsize=textsize  
+  targetparameters.forcedsize=forcedsize 
+  targetparameters.extrafactor=extrafactor
+  local tounicode=fonts.mappings.tounicode
+  local defaultwidth=resources.defaultwidth or 0
+  local defaultheight=resources.defaultheight or 0
+  local defaultdepth=resources.defaultdepth or 0
+  local units=parameters.units or 1000
+  targetproperties.language=properties.language or "dflt" 
+  targetproperties.script=properties.script  or "dflt" 
+  targetproperties.mode=properties.mode   or "base"
+  local askedscaledpoints=scaledpoints
+  local scaledpoints,delta=constructors.calculatescale(tfmdata,scaledpoints,nil,specification)
+  local hdelta=delta
+  local vdelta=delta
+  target.designsize=parameters.designsize 
+  target.units=units
+  target.units_per_em=units
+  local direction=properties.direction or tfmdata.direction or 0 
+  target.direction=direction
+  properties.direction=direction
+  target.size=scaledpoints
+  target.encodingbytes=properties.encodingbytes or 1
+  target.embedding=properties.embedding or "subset"
+  target.tounicode=1
+  target.cidinfo=properties.cidinfo
+  target.format=properties.format
+  target.cache=constructors.cacheintex and "yes" or "renew"
+  local fontname=properties.fontname or tfmdata.fontname
+  local fullname=properties.fullname or tfmdata.fullname
+  local filename=properties.filename or tfmdata.filename
+  local psname=properties.psname  or tfmdata.psname
+  local name=properties.name   or tfmdata.name
+  local psname,psfixed=fixedpsname(psname,fontname or fullname or file.nameonly(filename))
+  target.fontname=fontname
+  target.fullname=fullname
+  target.filename=filename
+  target.psname=psname
+  target.name=name
+  properties.fontname=fontname
+  properties.fullname=fullname
+  properties.filename=filename
+  properties.psname=psname
+  properties.name=name
+  local expansion=parameters.expansion
+  if expansion then
+    target.stretch=expansion.stretch
+    target.shrink=expansion.shrink
+    target.step=expansion.step
+  end
+  local extendfactor=parameters.extendfactor or 0
+  if extendfactor~=0 and extendfactor~=1 then
+    hdelta=hdelta*extendfactor
+    target.extend=extendfactor*1000 
+  else
+    target.extend=1000 
+  end
+  local slantfactor=parameters.slantfactor or 0
+  if slantfactor~=0 then
+    target.slant=slantfactor*1000
+  else
+    target.slant=0
+  end
+  targetparameters.factor=delta
+  targetparameters.hfactor=hdelta
+  targetparameters.vfactor=vdelta
+  targetparameters.size=scaledpoints
+  targetparameters.units=units
+  targetparameters.scaledpoints=askedscaledpoints
+  local isvirtual=properties.virtualized or tfmdata.type=="virtual"
+  local hasquality=parameters.expansion or parameters.protrusion
+  local hasitalics=properties.hasitalics
+  local autoitalicamount=properties.autoitalicamount
+  local stackmath=not properties.nostackmath
+  local nonames=properties.noglyphnames
+  local haskerns=properties.haskerns   or properties.mode=="base" 
+  local hasligatures=properties.hasligatures or properties.mode=="base" 
+  local realdimensions=properties.realdimensions
+  local writingmode=properties.writingmode or "horizontal"
+  local identity=properties.identity or "horizontal"
+  local vfonts=target.fonts
+  if vfonts and #vfonts>0 then
+    target.fonts=fastcopy(vfonts) 
+  elseif isvirtual then
+    target.fonts={ { id=0 } } 
+  end
+  if changed and not next(changed) then
+    changed=false
+  end
+  target.type=isvirtual and "virtual" or "real"
+  target.writingmode=writingmode=="vertical" and "vertical" or "horizontal"
+  target.identity=identity=="vertical" and "vertical" or "horizontal"
+  target.postprocessors=tfmdata.postprocessors
+  local targetslant=(parameters.slant     or parameters[1] or 0)*factors.pt 
+  local targetspace=(parameters.space     or parameters[2] or 0)*hdelta
+  local targetspace_stretch=(parameters.space_stretch or parameters[3] or 0)*hdelta
+  local targetspace_shrink=(parameters.space_shrink or parameters[4] or 0)*hdelta
+  local targetx_height=(parameters.x_height   or parameters[5] or 0)*vdelta
+  local targetquad=(parameters.quad     or parameters[6] or 0)*hdelta
+  local targetextra_space=(parameters.extra_space  or parameters[7] or 0)*hdelta
+  targetparameters.slant=targetslant 
+  targetparameters.space=targetspace
+  targetparameters.space_stretch=targetspace_stretch
+  targetparameters.space_shrink=targetspace_shrink
+  targetparameters.x_height=targetx_height
+  targetparameters.quad=targetquad
+  targetparameters.extra_space=targetextra_space
+  local ascender=parameters.ascender
+  if ascender then
+    targetparameters.ascender=delta*ascender
+  end
+  local descender=parameters.descender
+  if descender then
+    targetparameters.descender=delta*descender
+  end
+  constructors.enhanceparameters(targetparameters)
+  local protrusionfactor=(targetquad~=0 and 1000/targetquad) or 0
+  local scaledwidth=defaultwidth*hdelta
+  local scaledheight=defaultheight*vdelta
+  local scaleddepth=defaultdepth*vdelta
+  local hasmath=(properties.hasmath or next(mathparameters)) and true
+  if hasmath then
+    constructors.assignmathparameters(target,tfmdata) 
+    properties.hasmath=true
+    target.nomath=false
+    target.MathConstants=target.mathparameters
+  else
+    properties.hasmath=false
+    target.nomath=true
+    target.mathparameters=nil 
+  end
+  if hasmath then
+    local mathitalics=properties.mathitalics
+    if mathitalics==false then
+      if trace_defining then
+        report_defining("%s italics %s for font %a, fullname %a, filename %a","math",hasitalics and "ignored" or "disabled",name,fullname,filename)
+      end
+      hasitalics=false
+      autoitalicamount=false
+    end
+  else
+    local textitalics=properties.textitalics
+    if textitalics==false then
+      if trace_defining then
+        report_defining("%s italics %s for font %a, fullname %a, filename %a","text",hasitalics and "ignored" or "disabled",name,fullname,filename)
+      end
+      hasitalics=false
+      autoitalicamount=false
+    end
+  end
+  if trace_defining then
+    report_defining("defining tfm, name %a, fullname %a, filename %a, %spsname %a, hscale %a, vscale %a, math %a, italics %a",
+      name,fullname,filename,psfixed and "(fixed) " or "",psname,hdelta,vdelta,
+      hasmath and "enabled" or "disabled",hasitalics and "enabled" or "disabled")
+  end
+  constructors.beforecopyingcharacters(target,tfmdata)
+  local sharedkerns={}
+  for unicode,character in next,characters do
+    local chr,description,index
+    if changed then
+      local c=changed[unicode]
+      if c and c~=unicode then
+        if c then
+          description=descriptions[c] or descriptions[unicode] or character
+          character=characters[c] or character
+          index=description.index or c
+        else
+          description=descriptions[unicode] or character
+          index=description.index or unicode
+        end
+      else
+        description=descriptions[unicode] or character
+        index=description.index or unicode
+      end
+    else
+      description=descriptions[unicode] or character
+      index=description.index or unicode
+    end
+    local width=description.width
+    local height=description.height
+    local depth=description.depth
+    if realdimensions then
+      if not height or height==0 then
+        local bb=description.boundingbox
+        local ht=bb[4]
+        if ht~=0 then
+          height=ht
+        end
+        if not depth or depth==0 then
+          local dp=-bb[2]
+          if dp~=0 then
+            depth=dp
+          end
+        end
+      elseif not depth or depth==0 then
+        local dp=-description.boundingbox[2]
+        if dp~=0 then
+          depth=dp
+        end
+      end
+    end
+    if width then width=hdelta*width else width=scaledwidth end
+    if height then height=vdelta*height else height=scaledheight end
+    if depth and depth~=0 then
+      depth=delta*depth
+      if nonames then
+        chr={
+          index=index,
+          height=height,
+          depth=depth,
+          width=width,
+        }
+      else
+        chr={
+          name=description.name,
+          index=index,
+          height=height,
+          depth=depth,
+          width=width,
+        }
+      end
+    else
+      if nonames then
+        chr={
+          index=index,
+          height=height,
+          width=width,
+        }
+      else
+        chr={
+          name=description.name,
+          index=index,
+          height=height,
+          width=width,
+        }
+      end
+    end
+    local isunicode=description.unicode
+    if isunicode then
+      chr.unicode=isunicode
+      chr.tounicode=tounicode(isunicode)
+    end
+    if hasquality then
+      local ve=character.expansion_factor
+      if ve then
+        chr.expansion_factor=ve*1000 
+      end
+      local vl=character.left_protruding
+      if vl then
+        chr.left_protruding=protrusionfactor*width*vl
+      end
+      local vr=character.right_protruding
+      if vr then
+        chr.right_protruding=protrusionfactor*width*vr
+      end
+    end
+    if hasmath then
+      local vn=character.next
+      if vn then
+        chr.next=vn
+      else
+        local vv=character.vert_variants
+        if vv then
+          local t={}
+          for i=1,#vv do
+            local vvi=vv[i]
+            t[i]={
+              ["start"]=(vvi["start"]  or 0)*vdelta,
+              ["end"]=(vvi["end"]   or 0)*vdelta,
+              ["advance"]=(vvi["advance"] or 0)*vdelta,
+              ["extender"]=vvi["extender"],
+              ["glyph"]=vvi["glyph"],
+            }
+          end
+          chr.vert_variants=t
+        else
+          local hv=character.horiz_variants
+          if hv then
+            local t={}
+            for i=1,#hv do
+              local hvi=hv[i]
+              t[i]={
+                ["start"]=(hvi["start"]  or 0)*hdelta,
+                ["end"]=(hvi["end"]   or 0)*hdelta,
+                ["advance"]=(hvi["advance"] or 0)*hdelta,
+                ["extender"]=hvi["extender"],
+                ["glyph"]=hvi["glyph"],
+              }
+            end
+            chr.horiz_variants=t
+          end
+        end
+      end
+      local vi=character.vert_italic
+      if vi and vi~=0 then
+        chr.vert_italic=vi*hdelta
+      end
+      local va=character.accent
+      if va then
+        chr.top_accent=vdelta*va
+      end
+      if stackmath then
+        local mk=character.mathkerns
+        if mk then
+          local tr,tl,br,bl=mk.topright,mk.topleft,mk.bottomright,mk.bottomleft
+          chr.mathkern={ 
+            top_right=tr and mathkerns(tr,vdelta) or nil,
+            top_left=tl and mathkerns(tl,vdelta) or nil,
+            bottom_right=br and mathkerns(br,vdelta) or nil,
+            bottom_left=bl and mathkerns(bl,vdelta) or nil,
+          }
+        end
+      end
+      if hasitalics then
+        local vi=character.italic
+        if vi and vi~=0 then
+          chr.italic=vi*hdelta
+        end
+      end
+    elseif autoitalicamount then 
+      local vi=description.italic
+      if not vi then
+        local bb=description.boundingbox
+        if bb then
+          local vi=bb[3]-description.width+autoitalicamount
+          if vi>0 then 
+            chr.italic=vi*hdelta
+          end
+        else
+        end
+      elseif vi~=0 then
+        chr.italic=vi*hdelta
+      end
+    elseif hasitalics then 
+      local vi=character.italic
+      if vi and vi~=0 then
+        chr.italic=vi*hdelta
+      end
+    end
+    if haskerns then
+      local vk=character.kerns
+      if vk then
+        local s=sharedkerns[vk]
+        if not s then
+          s={}
+          for k,v in next,vk do s[k]=v*hdelta end
+          sharedkerns[vk]=s
+        end
+        chr.kerns=s
+      end
+    end
+    if hasligatures then
+      local vl=character.ligatures
+      if vl then
+        if true then
+          chr.ligatures=vl 
+        else
+          local tt={}
+          for i,l in next,vl do
+            tt[i]=l
+          end
+          chr.ligatures=tt
+        end
+      end
+    end
+    if isvirtual then
+      local vc=character.commands
+      if vc then
+        local ok=false
+        for i=1,#vc do
+          local key=vc[i][1]
+          if key=="right" or key=="down" then
+            ok=true
+            break
+          end
+        end
+        if ok then
+          local tt={}
+          for i=1,#vc do
+            local ivc=vc[i]
+            local key=ivc[1]
+            if key=="right" then
+              tt[i]={ key,ivc[2]*hdelta }
+            elseif key=="down" then
+              tt[i]={ key,ivc[2]*vdelta }
+            elseif key=="rule" then
+              tt[i]={ key,ivc[2]*vdelta,ivc[3]*hdelta }
+            else 
+              tt[i]=ivc 
+            end
+          end
+          chr.commands=tt
+        else
+          chr.commands=vc
+        end
+        chr.index=nil
+      end
+    end
+    targetcharacters[unicode]=chr
+  end
+  properties.setitalics=hasitalics
+  constructors.aftercopyingcharacters(target,tfmdata)
+  constructors.trytosharefont(target,tfmdata)
+  local vfonts=target.fonts
+  if isvirtual then
+    if not vfonts or #vfonts==0 then
+      target.fonts={ { id=0 } }
+    end
+  elseif vfonts then
+    properties.virtualized=true
+    target.type="virtual"
+    if #vfonts==0 then
+      target.fonts={ { id=0 } }
+    end
+  end
+  return target
+end
+function constructors.finalize(tfmdata)
+  if tfmdata.properties and tfmdata.properties.finalized then
+    return
+  end
+  if not tfmdata.characters then
+    return nil
+  end
+  if not tfmdata.goodies then
+    tfmdata.goodies={} 
+  end
+  local parameters=tfmdata.parameters
+  if not parameters then
+    return nil
+  end
+  if not parameters.expansion then
+    parameters.expansion={
+      stretch=tfmdata.stretch or 0,
+      shrink=tfmdata.shrink or 0,
+      step=tfmdata.step  or 0,
+    }
+  end
+  if not parameters.size then
+    parameters.size=tfmdata.size
+  end
+  if not parameters.extendfactor then
+    parameters.extendfactor=tfmdata.extend or 0
+  end
+  if not parameters.slantfactor then
+    parameters.slantfactor=tfmdata.slant or 0
+  end
+  local designsize=parameters.designsize
+  if designsize then
+    parameters.minsize=tfmdata.minsize or designsize
+    parameters.maxsize=tfmdata.maxsize or designsize
+  else
+    designsize=factors.pt*10
+    parameters.designsize=designsize
+    parameters.minsize=designsize
+    parameters.maxsize=designsize
+  end
+  parameters.minsize=tfmdata.minsize or parameters.designsize
+  parameters.maxsize=tfmdata.maxsize or parameters.designsize
+  if not parameters.units then
+    parameters.units=tfmdata.units or tfmdata.units_per_em or 1000
+  end
+  if not tfmdata.descriptions then
+    local descriptions={} 
+    setmetatableindex(descriptions,function(t,k) local v={} t[k]=v return v end)
+    tfmdata.descriptions=descriptions
+  end
+  local properties=tfmdata.properties
+  if not properties then
+    properties={}
+    tfmdata.properties=properties
+  end
+  if not properties.virtualized then
+    properties.virtualized=tfmdata.type=="virtual"
+  end
+  if not tfmdata.properties then
+    tfmdata.properties={
+      fontname=tfmdata.fontname,
+      filename=tfmdata.filename,
+      fullname=tfmdata.fullname,
+      name=tfmdata.name,
+      psname=tfmdata.psname,
+      encodingbytes=tfmdata.encodingbytes or 1,
+      embedding=tfmdata.embedding   or "subset",
+      tounicode=tfmdata.tounicode   or 1,
+      cidinfo=tfmdata.cidinfo    or nil,
+      format=tfmdata.format    or "type1",
+      direction=tfmdata.direction   or 0,
+      writingmode=tfmdata.writingmode  or "horizontal",
+      identity=tfmdata.identity   or "horizontal",
+    }
+  end
+  if not tfmdata.resources then
+    tfmdata.resources={}
+  end
+  if not tfmdata.shared then
+    tfmdata.shared={}
+  end
+  if not properties.hasmath then
+    properties.hasmath=not tfmdata.nomath
+  end
+  tfmdata.MathConstants=nil
+  tfmdata.postprocessors=nil
+  tfmdata.fontname=nil
+  tfmdata.filename=nil
+  tfmdata.fullname=nil
+  tfmdata.name=nil 
+  tfmdata.psname=nil
+  tfmdata.encodingbytes=nil
+  tfmdata.embedding=nil
+  tfmdata.tounicode=nil
+  tfmdata.cidinfo=nil
+  tfmdata.format=nil
+  tfmdata.direction=nil
+  tfmdata.type=nil
+  tfmdata.nomath=nil
+  tfmdata.designsize=nil
+  tfmdata.size=nil
+  tfmdata.stretch=nil
+  tfmdata.shrink=nil
+  tfmdata.step=nil
+  tfmdata.extend=nil
+  tfmdata.slant=nil
+  tfmdata.units=nil
+  tfmdata.units_per_em=nil
+  tfmdata.cache=nil
+  properties.finalized=true
+  return tfmdata
+end
+local hashmethods={}
+constructors.hashmethods=hashmethods
+function constructors.hashfeatures(specification) 
+  local features=specification.features
+  if features then
+    local t,n={},0
+    for category,list in sortedhash(features) do
+      if next(list) then
+        local hasher=hashmethods[category]
+        if hasher then
+          local hash=hasher(list)
+          if hash then
+            n=n+1
+            t[n]=category..":"..hash
+          end
+        end
+      end
+    end
+    if n>0 then
+      return concat(t," & ")
+    end
+  end
+  return "unknown"
+end
+hashmethods.normal=function(list)
+  local s={}
+  local n=0
+  for k,v in next,list do
+    if not k then
+    elseif k=="number" or k=="features" then
+    else
+      n=n+1
+      s[n]=k..'='..tostring(v)
+    end
+  end
+  if n>0 then
+    sort(s)
+    return concat(s,"+")
+  end
+end
+function constructors.hashinstance(specification,force)
+  local hash,size,fallbacks=specification.hash,specification.size,specification.fallbacks
+  if force or not hash then
+    hash=constructors.hashfeatures(specification)
+    specification.hash=hash
+  end
+  if size<1000 and designsizes[hash] then
+    size=math.round(constructors.scaled(size,designsizes[hash]))
+    specification.size=size
+  end
+  if fallbacks then
+    return hash..' @ '..tostring(size)..' @ '..fallbacks
+  else
+    return hash..' @ '..tostring(size)
+  end
+end
+function constructors.setname(tfmdata,specification) 
+  if constructors.namemode=="specification" then
+    local specname=specification.specification
+    if specname then
+      tfmdata.properties.name=specname
+      if trace_defining then
+        report_otf("overloaded fontname %a",specname)
+      end
+    end
+  end
+end
+function constructors.checkedfilename(data)
+  local foundfilename=data.foundfilename
+  if not foundfilename then
+    local askedfilename=data.filename or ""
+    if askedfilename~="" then
+      askedfilename=resolvers.resolve(askedfilename) 
+      foundfilename=resolvers.findbinfile(askedfilename,"") or ""
+      if foundfilename=="" then
+        report_defining("source file %a is not found",askedfilename)
+        foundfilename=resolvers.findbinfile(file.basename(askedfilename),"") or ""
+        if foundfilename~="" then
+          report_defining("using source file %a due to cache mismatch",foundfilename)
+        end
+      end
+    end
+    data.foundfilename=foundfilename
+  end
+  return foundfilename
+end
+local formats=allocate()
+fonts.formats=formats
+setmetatableindex(formats,function(t,k)
+  local l=lower(k)
+  if rawget(t,k) then
+    t[k]=l
+    return l
+  end
+  return rawget(t,file.suffix(l))
+end)
+do
+  local function setindeed(mode,source,target,group,name,position)
+    local action=source[mode]
+    if not action then
+      return
+    end
+    local t=target[mode]
+    if not t then
+      report_defining("fatal error in setting feature %a, group %a, mode %a",name,group,mode)
+      os.exit()
+    elseif position then
+      insert(t,position,{ name=name,action=action })
+    else
+      for i=1,#t do
+        local ti=t[i]
+        if ti.name==name then
+          ti.action=action
+          return
+        end
+      end
+      insert(t,{ name=name,action=action })
+    end
+  end
+  local function set(group,name,target,source)
+    target=target[group]
+    if not target then
+      report_defining("fatal target error in setting feature %a, group %a",name,group)
+      os.exit()
+    end
+    local source=source[group]
+    if not source then
+      report_defining("fatal source error in setting feature %a, group %a",name,group)
+      os.exit()
+    end
+    local position=source.position
+    setindeed("node",source,target,group,name,position)
+    setindeed("base",source,target,group,name,position)
+    setindeed("plug",source,target,group,name,position)
+  end
+  local function register(where,specification)
+    local name=specification.name
+    if name and name~="" then
+      local default=specification.default
+      local description=specification.description
+      local initializers=specification.initializers
+      local processors=specification.processors
+      local manipulators=specification.manipulators
+      local modechecker=specification.modechecker
+      if default then
+        where.defaults[name]=default
+      end
+      if description and description~="" then
+        where.descriptions[name]=description
+      end
+      if initializers then
+        set('initializers',name,where,specification)
+      end
+      if processors then
+        set('processors',name,where,specification)
+      end
+      if manipulators then
+        set('manipulators',name,where,specification)
+      end
+      if modechecker then
+        where.modechecker=modechecker
+      end
+    end
+  end
+  constructors.registerfeature=register
+  function constructors.getfeatureaction(what,where,mode,name)
+    what=handlers[what].features
+    if what then
+      where=what[where]
+      if where then
+        mode=where[mode]
+        if mode then
+          for i=1,#mode do
+            local m=mode[i]
+            if m.name==name then
+              return m.action
+            end
+          end
+        end
+      end
+    end
+  end
+  local newfeatures={}
+  constructors.newfeatures=newfeatures 
+  constructors.features=newfeatures
+  local function setnewfeatures(what)
+    local handler=handlers[what]
+    local features=handler.features
+    if not features then
+      local tables=handler.tables   
+      local statistics=handler.statistics 
+      features=allocate {
+        defaults={},
+        descriptions=tables and tables.features or {},
+        used=statistics and statistics.usedfeatures or {},
+        initializers={ base={},node={},plug={} },
+        processors={ base={},node={},plug={} },
+        manipulators={ base={},node={},plug={} },
+      }
+      features.register=function(specification) return register(features,specification) end
+      handler.features=features 
+    end
+    return features
+  end
+  setmetatable(newfeatures,{
+    __call=function(t,k) local v=t[k] return v end,
+    __index=function(t,k) local v=setnewfeatures(k) t[k]=v return v end,
+  })
+end
+do
+  local newhandler={}
+  constructors.handlers=newhandler 
+  constructors.newhandler=newhandler
+  local function setnewhandler(what) 
+    local handler=handlers[what]
+    if not handler then
+      handler={}
+      handlers[what]=handler
+    end
+    return handler
+  end
+  setmetatable(newhandler,{
+    __call=function(t,k) local v=t[k] return v end,
+    __index=function(t,k) local v=setnewhandler(k) t[k]=v return v end,
+  })
+end
+do
+  local newenhancer={}
+  constructors.enhancers=newenhancer
+  constructors.newenhancer=newenhancer
+  local function setnewenhancer(format)
+    local handler=handlers[format]
+    local enhancers=handler.enhancers
+    if not enhancers then
+      local actions=allocate() 
+      local before=allocate()
+      local after=allocate()
+      local order=allocate()
+      local known={}
+      local nofsteps=0
+      local patches={ before=before,after=after }
+      local trace=false
+      local report=logs.reporter("fonts",format.." enhancing")
+      trackers.register(format..".loading",function(v) trace=v end)
+      local function enhance(name,data,filename,raw)
+        local enhancer=actions[name]
+        if enhancer then
+          if trace then
+            report("apply enhancement %a to file %a",name,filename)
+            ioflush()
+          end
+          enhancer(data,filename,raw)
+        else
+        end
+      end
+      local function apply(data,filename,raw)
+        local basename=file.basename(lower(filename))
+        if trace then
+          report("%s enhancing file %a","start",filename)
+        end
+        ioflush() 
+        for e=1,nofsteps do
+          local enhancer=order[e]
+          local b=before[enhancer]
+          if b then
+            for pattern,action in next,b do
+              if find(basename,pattern) then
+                action(data,filename,raw)
+              end
+            end
+          end
+          enhance(enhancer,data,filename,raw) 
+          local a=after[enhancer]
+          if a then
+            for pattern,action in next,a do
+              if find(basename,pattern) then
+                action(data,filename,raw)
+              end
+            end
+          end
+          ioflush() 
+        end
+        if trace then
+          report("%s enhancing file %a","stop",filename)
+        end
+        ioflush() 
+      end
+      local function register(what,action)
+        if action then
+          if actions[what] then
+          else
+            nofsteps=nofsteps+1
+            order[nofsteps]=what
+            known[what]=nofsteps
+          end
+          actions[what]=action
+        else
+          report("bad enhancer %a",what)
+        end
+      end
+      local function patch(what,where,pattern,action)
+        local pw=patches[what]
+        if pw then
+          local ww=pw[where]
+          if ww then
+            ww[pattern]=action
+          else
+            pw[where]={ [pattern]=action }
+            if not known[where] then
+              nofsteps=nofsteps+1
+              order[nofsteps]=where
+              known[where]=nofsteps
+            end
+          end
+        end
+      end
+      enhancers={
+        register=register,
+        apply=apply,
+        patch=patch,
+        report=report,
+        patches={
+          register=patch,
+          report=report,
+        },
+      }
+      handler.enhancers=enhancers
+    end
+    return enhancers
+  end
+  setmetatable(newenhancer,{
+    __call=function(t,k) local v=t[k] return v end,
+    __index=function(t,k) local v=setnewenhancer(k) t[k]=v return v end,
+  })
+end
+function constructors.checkedfeatures(what,features)
+  local defaults=handlers[what].features.defaults
+  if features and next(features) then
+    features=fastcopy(features) 
+    for key,value in next,defaults do
+      if features[key]==nil then
+        features[key]=value
+      end
+    end
+    return features
+  else
+    return fastcopy(defaults) 
+  end
+end
+function constructors.initializefeatures(what,tfmdata,features,trace,report)
+  if features and next(features) then
+    local properties=tfmdata.properties or {} 
+    local whathandler=handlers[what]
+    local whatfeatures=whathandler.features
+    local whatmodechecker=whatfeatures.modechecker
+    local mode=properties.mode or (whatmodechecker and whatmodechecker(tfmdata,features,features.mode)) or features.mode or "base"
+    properties.mode=mode 
+    features.mode=mode
+    local done={}
+    while true do
+      local redo=false
+      local initializers=whatfeatures.initializers[mode]
+      if initializers then
+        for i=1,#initializers do
+          local step=initializers[i]
+          local feature=step.name
+          local value=features[feature]
+          if not value then
+          elseif done[feature] then
+          else
+            local action=step.action
+            if trace then
+              report("initializing feature %a to %a for mode %a for font %a",feature,
+                value,mode,tfmdata.properties.fullname)
+            end
+            action(tfmdata,value,features) 
+            if mode~=properties.mode or mode~=features.mode then
+              if whatmodechecker then
+                properties.mode=whatmodechecker(tfmdata,features,properties.mode) 
+                features.mode=properties.mode
+              end
+              if mode~=properties.mode then
+                mode=properties.mode
+                redo=true
+              end
+            end
+            done[feature]=true
+          end
+          if redo then
+            break
+          end
+        end
+        if not redo then
+          break
+        end
+      else
+        break
+      end
+    end
+    properties.mode=mode 
+    return true
+  else
+    return false
+  end
+end
+function constructors.collectprocessors(what,tfmdata,features,trace,report)
+  local processes,nofprocesses={},0
+  if features and next(features) then
+    local properties=tfmdata.properties
+    local whathandler=handlers[what]
+    local whatfeatures=whathandler.features
+    local whatprocessors=whatfeatures.processors
+    local mode=properties.mode
+    local processors=whatprocessors[mode]
+    if processors then
+      for i=1,#processors do
+        local step=processors[i]
+        local feature=step.name
+        if features[feature] then
+          local action=step.action
+          if trace then
+            report("installing feature processor %a for mode %a for font %a",feature,mode,tfmdata.properties.fullname)
+          end
+          if action then
+            nofprocesses=nofprocesses+1
+            processes[nofprocesses]=action
+          end
+        end
+      end
+    elseif trace then
+      report("no feature processors for mode %a for font %a",mode,properties.fullname)
+    end
+  end
+  return processes
+end
+function constructors.applymanipulators(what,tfmdata,features,trace,report)
+  if features and next(features) then
+    local properties=tfmdata.properties
+    local whathandler=handlers[what]
+    local whatfeatures=whathandler.features
+    local whatmanipulators=whatfeatures.manipulators
+    local mode=properties.mode
+    local manipulators=whatmanipulators[mode]
+    if manipulators then
+      for i=1,#manipulators do
+        local step=manipulators[i]
+        local feature=step.name
+        local value=features[feature]
+        if value then
+          local action=step.action
+          if trace then
+            report("applying feature manipulator %a for mode %a for font %a",feature,mode,properties.fullname)
+          end
+          if action then
+            action(tfmdata,feature,value)
+          end
+        end
+      end
+    end
+  end
+end
+function constructors.addcoreunicodes(unicodes) 
+  if not unicodes then
+    unicodes={}
+  end
+  unicodes.space=0x0020
+  unicodes.hyphen=0x002D
+  unicodes.zwj=0x200D
+  unicodes.zwnj=0x200C
+  return unicodes
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['luatex-font-enc']={
+  version=1.001,
+  comment="companion to luatex-*.tex",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+if context then
+  texio.write_nl("fatal error: this module is not for context")
+  os.exit()
+end
+local fonts=fonts
+local encodings={}
+fonts.encodings=encodings
+encodings.agl={}
+encodings.known={}
+setmetatable(encodings.agl,{ __index=function(t,k)
+  if k=="unicodes" then
+    texio.write(" <loading (extended) adobe glyph list>")
+    local unicodes=dofile(resolvers.findfile("font-age.lua"))
+    encodings.agl={ unicodes=unicodes }
+    return unicodes
+  else
+    return nil
+  end
+end })
+encodings.cache=containers.define("fonts","enc",encodings.version,true)
+function encodings.load(filename)
+  local name=file.removesuffix(filename)
+  local data=containers.read(encodings.cache,name)
+  if data then
+    return data
+  end
+  local vector,tag,hash,unicodes={},"",{},{}
+  local foundname=resolvers.findfile(filename,'enc')
+  if foundname and foundname~="" then
+    local ok,encoding,size=resolvers.loadbinfile(foundname)
+    if ok and encoding then
+      encoding=string.gsub(encoding,"%%(.-)\n","")
+      local unicoding=encodings.agl.unicodes
+      local tag,vec=string.match(encoding,"/(%w+)%s*%[(.*)%]%s*def")
+      local i=0
+      for ch in string.gmatch(vec,"/([%a%d%.]+)") do
+        if ch~=".notdef" then
+          vector[i]=ch
+          if not hash[ch] then
+            hash[ch]=i
+          else
+          end
+          local u=unicoding[ch]
+          if u then
+            unicodes[u]=i
+          end
+        end
+        i=i+1
+      end
+    end
+  end
+  local data={
+    name=name,
+    tag=tag,
+    vector=vector,
+    hash=hash,
+    unicodes=unicodes
+  }
+  return containers.write(encodings.cache,name,data)
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-cid']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local format,match,lower=string.format,string.match,string.lower
+local tonumber=tonumber
+local P,S,R,C,V,lpegmatch=lpeg.P,lpeg.S,lpeg.R,lpeg.C,lpeg.V,lpeg.match
+local fonts,logs,trackers=fonts,logs,trackers
+local trace_loading=false trackers.register("otf.loading",function(v) trace_loading=v end)
+local report_otf=logs.reporter("fonts","otf loading")
+local cid={}
+fonts.cid=cid
+local cidmap={}
+local cidmax=10
+local number=C(R("09","af","AF")^1)
+local space=S(" \n\r\t")
+local spaces=space^0
+local period=P(".")
+local periods=period*period
+local name=P("/")*C((1-space)^1)
+local unicodes,names={},{} 
+local function do_one(a,b)
+  unicodes[tonumber(a)]=tonumber(b,16)
+end
+local function do_range(a,b,c)
+  c=tonumber(c,16)
+  for i=tonumber(a),tonumber(b) do
+    unicodes[i]=c
+    c=c+1
+  end
+end
+local function do_name(a,b)
+  names[tonumber(a)]=b
+end
+local grammar=P { "start",
+  start=number*spaces*number*V("series"),
+  series=(spaces*(V("one")+V("range")+V("named")))^1,
+  one=(number*spaces*number)/do_one,
+  range=(number*periods*number*spaces*number)/do_range,
+  named=(number*spaces*name)/do_name
+}
+local function loadcidfile(filename)
+  local data=io.loaddata(filename)
+  if data then
+    unicodes,names={},{}
+    lpegmatch(grammar,data)
+    local supplement,registry,ordering=match(filename,"^(.-)%-(.-)%-()%.(.-)$")
+    return {
+      supplement=supplement,
+      registry=registry,
+      ordering=ordering,
+      filename=filename,
+      unicodes=unicodes,
+      names=names,
+    }
+  end
+end
+cid.loadfile=loadcidfile 
+local template="%s-%s-%s.cidmap"
+local function locate(registry,ordering,supplement)
+  local filename=format(template,registry,ordering,supplement)
+  local hashname=lower(filename)
+  local found=cidmap[hashname]
+  if not found then
+    if trace_loading then
+      report_otf("checking cidmap, registry %a, ordering %a, supplement %a, filename %a",registry,ordering,supplement,filename)
+    end
+    local fullname=resolvers.findfile(filename,'cid') or ""
+    if fullname~="" then
+      found=loadcidfile(fullname)
+      if found then
+        if trace_loading then
+          report_otf("using cidmap file %a",filename)
+        end
+        cidmap[hashname]=found
+        found.usedname=file.basename(filename)
+      end
+    end
+  end
+  return found
+end
+function cid.getmap(specification)
+  if not specification then
+    report_otf("invalid cidinfo specification, table expected")
+    return
+  end
+  local registry=specification.registry
+  local ordering=specification.ordering
+  local supplement=specification.supplement
+  local filename=format(registry,ordering,supplement)
+  local lowername=lower(filename)
+  local found=cidmap[lowername]
+  if found then
+    return found
+  end
+  if ordering=="Identity" then
+    local found={
+      supplement=supplement,
+      registry=registry,
+      ordering=ordering,
+      filename=filename,
+      unicodes={},
+      names={},
+    }
+    cidmap[lowername]=found
+    return found
+  end
+  if trace_loading then
+    report_otf("cidmap needed, registry %a, ordering %a, supplement %a",registry,ordering,supplement)
+  end
+  found=locate(registry,ordering,supplement)
+  if not found then
+    local supnum=tonumber(supplement)
+    local cidnum=nil
+    if supnum<cidmax then
+      for s=supnum+1,cidmax do
+        local c=locate(registry,ordering,s)
+        if c then
+          found,cidnum=c,s
+          break
+        end
+      end
+    end
+    if not found and supnum>0 then
+      for s=supnum-1,0,-1 do
+        local c=locate(registry,ordering,s)
+        if c then
+          found,cidnum=c,s
+          break
+        end
+      end
+    end
+    registry=lower(registry)
+    ordering=lower(ordering)
+    if found and cidnum>0 then
+      for s=0,cidnum-1 do
+        local filename=format(template,registry,ordering,s)
+        if not cidmap[filename] then
+          cidmap[filename]=found
+        end
+      end
+    end
+  end
+  return found
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-map']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local tonumber,next,type=tonumber,next,type
+local match,format,find,concat,gsub,lower=string.match,string.format,string.find,table.concat,string.gsub,string.lower
+local P,R,S,C,Ct,Cc,lpegmatch=lpeg.P,lpeg.R,lpeg.S,lpeg.C,lpeg.Ct,lpeg.Cc,lpeg.match
+local floor=math.floor
+local formatters=string.formatters
+local sortedhash,sortedkeys=table.sortedhash,table.sortedkeys
+local trace_loading=false trackers.register("fonts.loading",function(v) trace_loading=v end)
+local trace_mapping=false trackers.register("fonts.mapping",function(v) trace_mapping=v end)
+local report_fonts=logs.reporter("fonts","loading")
+local force_ligatures=false directives.register("fonts.mapping.forceligatures",function(v) force_ligatures=v end)
+local fonts=fonts or {}
+local mappings=fonts.mappings or {}
+fonts.mappings=mappings
+local allocate=utilities.storage.allocate
+local hex=R("AF","af","09")
+local hexfour=(hex*hex*hex^-2)/function(s) return tonumber(s,16) end
+local hexsix=(hex*hex*hex^-4)/function(s) return tonumber(s,16) end
+local dec=(R("09")^1)/tonumber
+local period=P(".")
+local unicode=(P("uni")+P("UNI"))*(hexfour*(period+P(-1))*Cc(false)+Ct(hexfour^1)*Cc(true)) 
+local ucode=(P("u")+P("U") )*(hexsix*(period+P(-1))*Cc(false)+Ct(hexsix^1)*Cc(true)) 
+local index=P("index")*dec*Cc(false)
+local parser=unicode+ucode+index
+local parsers={}
+local function makenameparser(str)
+  if not str or str=="" then
+    return parser
+  else
+    local p=parsers[str]
+    if not p then
+      p=P(str)*period*dec*Cc(false)
+      parsers[str]=p
+    end
+    return p
+  end
+end
+local f_single=formatters["%04X"]
+local f_double=formatters["%04X%04X"]
+local function tounicode16(unicode)
+  if unicode<0xD7FF or (unicode>0xDFFF and unicode<=0xFFFF) then
+    return f_single(unicode)
+  else
+    unicode=unicode-0x10000
+    return f_double(floor(unicode/1024)+0xD800,unicode%1024+0xDC00)
+  end
+end
+local function tounicode16sequence(unicodes)
+  local t={}
+  for l=1,#unicodes do
+    local u=unicodes[l]
+    if u<0xD7FF or (u>0xDFFF and u<=0xFFFF) then
+      t[l]=f_single(u)
+    else
+      u=u-0x10000
+      t[l]=f_double(floor(u/1024)+0xD800,u%1024+0xDC00)
+    end
+  end
+  return concat(t)
+end
+local function tounicode(unicode,name)
+  if type(unicode)=="table" then
+    local t={}
+    for l=1,#unicode do
+      local u=unicode[l]
+      if u<0xD7FF or (u>0xDFFF and u<=0xFFFF) then
+        t[l]=f_single(u)
+      else
+        u=u-0x10000
+        t[l]=f_double(floor(u/1024)+0xD800,u%1024+0xDC00)
+      end
+    end
+    return concat(t)
+  else
+    if unicode<0xD7FF or (unicode>0xDFFF and unicode<=0xFFFF) then
+      return f_single(unicode)
+    else
+      unicode=unicode-0x10000
+      return f_double(floor(unicode/1024)+0xD800,unicode%1024+0xDC00)
+    end
+  end
+end
+local function fromunicode16(str)
+  if #str==4 then
+    return tonumber(str,16)
+  else
+    local l,r=match(str,"(....)(....)")
+    return 0x10000+(tonumber(l,16)-0xD800)*0x400+tonumber(r,16)-0xDC00
+  end
+end
+mappings.makenameparser=makenameparser
+mappings.tounicode=tounicode
+mappings.tounicode16=tounicode16
+mappings.tounicode16sequence=tounicode16sequence
+mappings.fromunicode16=fromunicode16
+local ligseparator=P("_")
+local varseparator=P(".")
+local namesplitter=Ct(C((1-ligseparator-varseparator)^1)*(ligseparator*C((1-ligseparator-varseparator)^1))^0)
+do
+  local overloads=allocate {
+    IJ={ name="I_J",unicode={ 0x49,0x4A },mess=0x0132 },
+    ij={ name="i_j",unicode={ 0x69,0x6A },mess=0x0133 },
+    ff={ name="f_f",unicode={ 0x66,0x66 },mess=0xFB00 },
+    fi={ name="f_i",unicode={ 0x66,0x69 },mess=0xFB01 },
+    fl={ name="f_l",unicode={ 0x66,0x6C },mess=0xFB02 },
+    ffi={ name="f_f_i",unicode={ 0x66,0x66,0x69 },mess=0xFB03 },
+    ffl={ name="f_f_l",unicode={ 0x66,0x66,0x6C },mess=0xFB04 },
+    fj={ name="f_j",unicode={ 0x66,0x6A } },
+    fk={ name="f_k",unicode={ 0x66,0x6B } },
+  }
+  local o={}
+  for k,v in next,overloads do
+    local name=v.name
+    local mess=v.mess
+    if name then
+      o[name]=v
+    end
+    if mess then
+      o[mess]=v
+    end
+    o[k]=v
+  end
+  mappings.overloads=o
+end
+function mappings.addtounicode(data,filename,checklookups,forceligatures)
+  local resources=data.resources
+  local unicodes=resources.unicodes
+  if not unicodes then
+    if trace_mapping then
+      report_fonts("no unicode list, quitting tounicode for %a",filename)
+    end
+    return
+  end
+  local properties=data.properties
+  local descriptions=data.descriptions
+  local overloads=mappings.overloads
+  unicodes['space']=unicodes['space'] or 32
+  unicodes['hyphen']=unicodes['hyphen'] or 45
+  unicodes['zwj']=unicodes['zwj']  or 0x200D
+  unicodes['zwnj']=unicodes['zwnj']  or 0x200C
+  local private=fonts.constructors and fonts.constructors.privateoffset or 0xF0000 
+  local unicodevector=fonts.encodings.agl.unicodes or {} 
+  local contextvector=fonts.encodings.agl.ctxcodes or {} 
+  local missing={}
+  local nofmissing=0
+  local oparser=nil
+  local cidnames=nil
+  local cidcodes=nil
+  local cidinfo=properties.cidinfo
+  local usedmap=cidinfo and fonts.cid.getmap(cidinfo)
+  local uparser=makenameparser() 
+  if usedmap then
+     oparser=usedmap and makenameparser(cidinfo.ordering)
+     cidnames=usedmap.names
+     cidcodes=usedmap.unicodes
+  end
+  local ns=0
+  local nl=0
+  local dlist=sortedkeys(descriptions)
+  for i=1,#dlist do
+    local du=dlist[i]
+    local glyph=descriptions[du]
+    local name=glyph.name
+    if name then
+      local overload=overloads[name] or overloads[du]
+      if overload then
+        glyph.unicode=overload.unicode
+      else
+        local gu=glyph.unicode 
+        if not gu or gu==-1 or du>=private or (du>=0xE000 and du<=0xF8FF) or du==0xFFFE or du==0xFFFF then
+          local unicode=unicodevector[name] or contextvector[name]
+          if unicode then
+            glyph.unicode=unicode
+            ns=ns+1
+          end
+          if (not unicode) and usedmap then
+            local foundindex=lpegmatch(oparser,name)
+            if foundindex then
+              unicode=cidcodes[foundindex] 
+              if unicode then
+                glyph.unicode=unicode
+                ns=ns+1
+              else
+                local reference=cidnames[foundindex] 
+                if reference then
+                  local foundindex=lpegmatch(oparser,reference)
+                  if foundindex then
+                    unicode=cidcodes[foundindex]
+                    if unicode then
+                      glyph.unicode=unicode
+                      ns=ns+1
+                    end
+                  end
+                  if not unicode or unicode=="" then
+                    local foundcodes,multiple=lpegmatch(uparser,reference)
+                    if foundcodes then
+                      glyph.unicode=foundcodes
+                      if multiple then
+                        nl=nl+1
+                        unicode=true
+                      else
+                        ns=ns+1
+                        unicode=foundcodes
+                      end
+                    end
+                  end
+                end
+              end
+            end
+          end
+          if not unicode or unicode=="" then
+            local split=lpegmatch(namesplitter,name)
+            local nsplit=split and #split or 0 
+            if nsplit==0 then
+            elseif nsplit==1 then
+              local base=split[1]
+              local u=unicodes[base] or unicodevector[base] or contextvector[name]
+              if not u then
+              elseif type(u)=="table" then
+                if u[1]<private then
+                  unicode=u
+                  glyph.unicode=unicode
+                end
+              elseif u<private then
+                unicode=u
+                glyph.unicode=unicode
+              end
+            else
+              local t,n={},0
+              for l=1,nsplit do
+                local base=split[l]
+                local u=unicodes[base] or unicodevector[base] or contextvector[name]
+                if not u then
+                  break
+                elseif type(u)=="table" then
+                  if u[1]>=private then
+                    break
+                  end
+                  n=n+1
+                  t[n]=u[1]
+                else
+                  if u>=private then
+                    break
+                  end
+                  n=n+1
+                  t[n]=u
+                end
+              end
+              if n>0 then
+                if n==1 then
+                  unicode=t[1]
+                else
+                  unicode=t
+                end
+                glyph.unicode=unicode
+              end
+            end
+            nl=nl+1
+          end
+          if not unicode or unicode=="" then
+            local foundcodes,multiple=lpegmatch(uparser,name)
+            if foundcodes then
+              glyph.unicode=foundcodes
+              if multiple then
+                nl=nl+1
+                unicode=true
+              else
+                ns=ns+1
+                unicode=foundcodes
+              end
+            end
+          end
+          local r=overloads[unicode]
+          if r then
+            unicode=r.unicode
+            glyph.unicode=unicode
+          end
+          if not unicode then
+            missing[du]=true
+            nofmissing=nofmissing+1
+          end
+        end
+      end
+    else
+      local overload=overloads[du]
+      if overload then
+        glyph.unicode=overload.unicode
+      end
+    end
+  end
+  if type(checklookups)=="function" then
+    checklookups(data,missing,nofmissing)
+  end
+  local unicoded=0
+  local collected=fonts.handlers.otf.readers.getcomponents(data) 
+  local function resolve(glyph,u)
+    local n=#u
+    for i=1,n do
+      if u[i]>private then
+        n=0
+        break
+      end
+    end
+    if n>0 then
+      if n>1 then
+        glyph.unicode=u
+      else
+        glyph.unicode=u[1]
+      end
+      unicoded=unicoded+1
+    end
+  end
+  if not collected then
+  elseif forceligatures or force_ligatures then
+    for i=1,#dlist do
+      local du=dlist[i]
+      if du>=private or (du>=0xE000 and du<=0xF8FF) then
+        local u=collected[du] 
+        if u then
+          resolve(descriptions[du],u)
+        end
+      end
+    end
+  else
+    for i=1,#dlist do
+      local du=dlist[i]
+      if du>=private or (du>=0xE000 and du<=0xF8FF) then
+        local glyph=descriptions[du]
+        if glyph.class=="ligature" and not glyph.unicode then
+          local u=collected[du] 
+          if u then
+             resolve(glyph,u)
+          end
+        end
+      end
+    end
+  end
+  if trace_mapping and unicoded>0 then
+    report_fonts("%n ligature tounicode mappings deduced from gsub ligature features",unicoded)
+  end
+  if trace_mapping then
+    for i=1,#dlist do
+      local du=dlist[i]
+      local glyph=descriptions[du]
+      local name=glyph.name or "-"
+      local index=glyph.index or 0
+      local unicode=glyph.unicode
+      if unicode then
+        if type(unicode)=="table" then
+          local unicodes={}
+          for i=1,#unicode do
+            unicodes[i]=formatters("%U",unicode[i])
+          end
+          report_fonts("internal slot %U, name %a, unicode %U, tounicode % t",index,name,du,unicodes)
+        else
+          report_fonts("internal slot %U, name %a, unicode %U, tounicode %U",index,name,du,unicode)
+        end
+      else
+        report_fonts("internal slot %U, name %a, unicode %U",index,name,du)
+      end
+    end
+  end
+  if trace_loading and (ns>0 or nl>0) then
+    report_fonts("%s tounicode entries added, ligatures %s",nl+ns,ns)
+  end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['luatex-fonts-syn']={
+  version=1.001,
+  comment="companion to luatex-*.tex",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+if context then
+  texio.write_nl("fatal error: this module is not for context")
+  os.exit()
+end
+local fonts=fonts
+fonts.names=fonts.names or {}
+fonts.names.version=1.001 
+fonts.names.basename="luatex-fonts-names"
+fonts.names.cache=containers.define("fonts","data",fonts.names.version,true)
+local data=nil
+local loaded=false
+local fileformats={ "lua","tex","other text files" }
+function fonts.names.reportmissingbase()
+  texio.write("<missing font database, run: mtxrun --script fonts --reload --simple>")
+  fonts.names.reportmissingbase=nil
+end
+function fonts.names.reportmissingname()
+  texio.write("<unknown font in database, run: mtxrun --script fonts --reload --simple>")
+  fonts.names.reportmissingname=nil
+end
+function fonts.names.resolve(name,sub)
+  if not loaded then
+    local basename=fonts.names.basename
+    if basename and basename~="" then
+      data=containers.read(fonts.names.cache,basename)
+      if not data then
+        basename=file.addsuffix(basename,"lua")
+        for i=1,#fileformats do
+          local format=fileformats[i]
+          local foundname=resolvers.findfile(basename,format) or ""
+          if foundname~="" then
+            data=dofile(foundname)
+            texio.write("<font database loaded: ",foundname,">")
+            break
+          end
+        end
+      end
+    end
+    loaded=true
+  end
+  if type(data)=="table" and data.version==fonts.names.version then
+    local condensed=string.gsub(string.lower(name),"[^%a%d]","")
+    local found=data.mappings and data.mappings[condensed]
+    if found then
+      local fontname,filename,subfont=found[1],found[2],found[3]
+      if subfont then
+        return filename,fontname
+      else
+        return filename,false
+      end
+    elseif fonts.names.reportmissingname then
+      fonts.names.reportmissingname()
+      return name,false 
+    end
+  elseif fonts.names.reportmissingbase then
+    fonts.names.reportmissingbase()
+  end
+end
+fonts.names.resolvespec=fonts.names.resolve 
+function fonts.names.getfilename(askedname,suffix) 
+  return ""
+end
+function fonts.names.ignoredfile(filename) 
+  return false 
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-oti']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local lower=string.lower
+local fonts=fonts
+local constructors=fonts.constructors
+local otf=constructors.handlers.otf
+local otffeatures=constructors.features.otf
+local registerotffeature=otffeatures.register
+local otftables=otf.tables or {}
+otf.tables=otftables
+local allocate=utilities.storage.allocate
+registerotffeature {
+  name="features",
+  description="initialization of feature handler",
+  default=true,
+}
+local function setmode(tfmdata,value)
+  if value then
+    tfmdata.properties.mode=lower(value)
+  end
+end
+otf.modeinitializer=setmode
+local function setlanguage(tfmdata,value)
+  if value then
+    local cleanvalue=lower(value)
+    local languages=otftables and otftables.languages
+    local properties=tfmdata.properties
+    if not languages then
+      properties.language=cleanvalue
+    elseif languages[value] then
+      properties.language=cleanvalue
+    else
+      properties.language="dflt"
+    end
+  end
+end
+local function setscript(tfmdata,value)
+  if value then
+    local cleanvalue=lower(value)
+    local scripts=otftables and otftables.scripts
+    local properties=tfmdata.properties
+    if not scripts then
+      properties.script=cleanvalue
+    elseif scripts[value] then
+      properties.script=cleanvalue
+    else
+      properties.script="dflt"
+    end
+  end
+end
+registerotffeature {
+  name="mode",
+  description="mode",
+  initializers={
+    base=setmode,
+    node=setmode,
+    plug=setmode,
+  }
+}
+registerotffeature {
+  name="language",
+  description="language",
+  initializers={
+    base=setlanguage,
+    node=setlanguage,
+    plug=setlanguage,
+  }
+}
+registerotffeature {
+  name="script",
+  description="script",
+  initializers={
+    base=setscript,
+    node=setscript,
+    plug=setscript,
+  }
+}
+otftables.featuretypes=allocate {
+  gpos_single="position",
+  gpos_pair="position",
+  gpos_cursive="position",
+  gpos_mark2base="position",
+  gpos_mark2ligature="position",
+  gpos_mark2mark="position",
+  gpos_context="position",
+  gpos_contextchain="position",
+  gsub_single="substitution",
+  gsub_multiple="substitution",
+  gsub_alternate="substitution",
+  gsub_ligature="substitution",
+  gsub_context="substitution",
+  gsub_contextchain="substitution",
+  gsub_reversecontextchain="substitution",
+  gsub_reversesub="substitution",
+}
+function otffeatures.checkeddefaultscript(featuretype,autoscript,scripts)
+  if featuretype=="position" then
+    local default=scripts.dflt
+    if default then
+      if autoscript=="position" or autoscript==true then
+        return default
+      else
+        report_otf("script feature %s not applied, enable default positioning")
+      end
+    else
+    end
+  elseif featuretype=="substitution" then
+    local default=scripts.dflt
+    if default then
+      if autoscript=="substitution" or autoscript==true then
+        return default
+      end
+    end
+  end
+end
+function otffeatures.checkeddefaultlanguage(featuretype,autolanguage,languages)
+  if featuretype=="position" then
+    local default=languages.dflt
+    if default then
+      if autolanguage=="position" or autolanguage==true then
+        return default
+      else
+        report_otf("language feature %s not applied, enable default positioning")
+      end
+    else
+    end
+  elseif featuretype=="substitution" then
+    local default=languages.dflt
+    if default then
+      if autolanguage=="substitution" or autolanguage==true then
+        return default
+      end
+    end
+  end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-otr']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local next,type=next,type
+local byte,lower,char,gsub=string.byte,string.lower,string.char,string.gsub
+local floor,round=math.floor,math.round
+local P,R,S,C,Cs,Cc,Ct,Carg,Cmt=lpeg.P,lpeg.R,lpeg.S,lpeg.C,lpeg.Cs,lpeg.Cc,lpeg.Ct,lpeg.Carg,lpeg.Cmt
+local lpegmatch=lpeg.match
+local setmetatableindex=table.setmetatableindex
+local formatters=string.formatters
+local sortedkeys=table.sortedkeys
+local sortedhash=table.sortedhash
+local stripstring=string.nospaces
+local utf16_to_utf8_be=utf.utf16_to_utf8_be
+local report=logs.reporter("otf reader")
+local trace_cmap=false 
+local trace_cmap_detail=false
+fonts=fonts or {}
+local handlers=fonts.handlers or {}
+fonts.handlers=handlers
+local otf=handlers.otf or {}
+handlers.otf=otf
+local readers=otf.readers or {}
+otf.readers=readers
+local streamreader=utilities.files  
+local streamwriter=utilities.files
+readers.streamreader=streamreader
+readers.streamwriter=streamwriter
+local openfile=streamreader.open
+local closefile=streamreader.close
+local setposition=streamreader.setposition
+local skipshort=streamreader.skipshort
+local readbytes=streamreader.readbytes
+local readstring=streamreader.readstring
+local readbyte=streamreader.readcardinal1 
+local readushort=streamreader.readcardinal2 
+local readuint=streamreader.readcardinal3 
+local readulong=streamreader.readcardinal4
+local readshort=streamreader.readinteger2  
+local readlong=streamreader.readinteger4  
+local readfixed=streamreader.readfixed4
+local read2dot14=streamreader.read2dot14   
+local readfword=readshort          
+local readufword=readushort         
+local readoffset=readushort
+function streamreader.readtag(f)
+  return lower(stripstring(readstring(f,4)))
+end
+local function readlongdatetime(f)
+  local a,b,c,d,e,f,g,h=readbytes(f,8)
+  return 0x100000000*d+0x1000000*e+0x10000*f+0x100*g+h
+end
+local tableversion=0.004
+readers.tableversion=tableversion
+local privateoffset=fonts.constructors and fonts.constructors.privateoffset or 0xF0000
+local reservednames={ [0]="copyright",
+  "family",
+  "subfamily",
+  "uniqueid",
+  "fullname",
+  "version",
+  "postscriptname",
+  "trademark",
+  "manufacturer",
+  "designer",
+  "description",
+  "vendorurl",
+  "designerurl",
+  "license",
+  "licenseurl",
+  "reserved",
+  "typographicfamily",
+  "typographicsubfamily",
+  "compatiblefullname",
+  "sampletext",
+  "cidfindfontname",
+  "wwsfamily",
+  "wwssubfamily",
+  "lightbackgroundpalette",
+  "darkbackgroundpalette",
+  "variationspostscriptnameprefix",
+}
+local platforms={ [0]="unicode",
+  "macintosh",
+  "iso",
+  "windows",
+  "custom",
+}
+local encodings={
+  unicode={ [0]="unicode 1.0 semantics",
+    "unicode 1.1 semantics",
+    "iso/iec 10646",
+    "unicode 2.0 bmp",
+    "unicode 2.0 full",
+    "unicode variation sequences",
+    "unicode full repertoire",
+  },
+  macintosh={ [0]="roman","japanese","chinese (traditional)","korean","arabic","hebrew","greek","russian",
+    "rsymbol","devanagari","gurmukhi","gujarati","oriya","bengali","tamil","telugu","kannada",
+    "malayalam","sinhalese","burmese","khmer","thai","laotian","georgian","armenian",
+    "chinese (simplified)","tibetan","mongolian","geez","slavic","vietnamese","sindhi",
+    "uninterpreted",
+  },
+  iso={ [0]="7-bit ascii",
+    "iso 10646",
+    "iso 8859-1",
+  },
+  windows={ [0]="symbol",
+    "unicode bmp",
+    "shiftjis",
+    "prc",
+    "big5",
+    "wansung",
+    "johab",
+    "reserved 7",
+    "reserved 8",
+    "reserved 9",
+    "unicode ucs-4",
+  },
+  custom={
+  }
+}
+local decoders={
+  unicode={},
+  macintosh={},
+  iso={},
+  windows={
+    ["unicode semantics"]=utf16_to_utf8_be,
+    ["unicode bmp"]=utf16_to_utf8_be,
+    ["unicode full"]=utf16_to_utf8_be,
+    ["unicode 1.0 semantics"]=utf16_to_utf8_be,
+    ["unicode 1.1 semantics"]=utf16_to_utf8_be,
+    ["unicode 2.0 bmp"]=utf16_to_utf8_be,
+    ["unicode 2.0 full"]=utf16_to_utf8_be,
+    ["unicode variation sequences"]=utf16_to_utf8_be,
+    ["unicode full repertoire"]=utf16_to_utf8_be,
+  },
+  custom={},
+}
+local languages={
+  unicode={
+    [ 0]="english",
+  },
+  macintosh={
+    [ 0]="english",
+  },
+  iso={},
+  windows={
+    [0x0409]="english - united states",
+  },
+  custom={},
+}
+local standardromanencoding={ [0]=
+  "notdef",".null","nonmarkingreturn","space","exclam","quotedbl",
+  "numbersign","dollar","percent","ampersand","quotesingle","parenleft",
+  "parenright","asterisk","plus","comma","hyphen","period","slash",
+  "zero","one","two","three","four","five","six","seven","eight",
+  "nine","colon","semicolon","less","equal","greater","question","at",
+  "A","B","C","D","E","F","G","H","I","J","K","L","M","N","O",
+  "P","Q","R","S","T","U","V","W","X","Y","Z","bracketleft",
+  "backslash","bracketright","asciicircum","underscore","grave","a","b",
+  "c","d","e","f","g","h","i","j","k","l","m","n","o","p","q",
+  "r","s","t","u","v","w","x","y","z","braceleft","bar",
+  "braceright","asciitilde","Adieresis","Aring","Ccedilla","Eacute",
+  "Ntilde","Odieresis","Udieresis","aacute","agrave","acircumflex",
+  "adieresis","atilde","aring","ccedilla","eacute","egrave",
+  "ecircumflex","edieresis","iacute","igrave","icircumflex","idieresis",
+  "ntilde","oacute","ograve","ocircumflex","odieresis","otilde","uacute",
+  "ugrave","ucircumflex","udieresis","dagger","degree","cent","sterling",
+  "section","bullet","paragraph","germandbls","registered","copyright",
+  "trademark","acute","dieresis","notequal","AE","Oslash","infinity",
+  "plusminus","lessequal","greaterequal","yen","mu","partialdiff",
+  "summation","product","pi","integral","ordfeminine","ordmasculine",
+  "Omega","ae","oslash","questiondown","exclamdown","logicalnot",
+  "radical","florin","approxequal","Delta","guillemotleft",
+  "guillemotright","ellipsis","nonbreakingspace","Agrave","Atilde",
+  "Otilde","OE","oe","endash","emdash","quotedblleft","quotedblright",
+  "quoteleft","quoteright","divide","lozenge","ydieresis","Ydieresis",
+  "fraction","currency","guilsinglleft","guilsinglright","fi","fl",
+  "daggerdbl","periodcentered","quotesinglbase","quotedblbase",
+  "perthousand","Acircumflex","Ecircumflex","Aacute","Edieresis","Egrave",
+  "Iacute","Icircumflex","Idieresis","Igrave","Oacute","Ocircumflex",
+  "apple","Ograve","Uacute","Ucircumflex","Ugrave","dotlessi",
+  "circumflex","tilde","macron","breve","dotaccent","ring","cedilla",
+  "hungarumlaut","ogonek","caron","Lslash","lslash","Scaron","scaron",
+  "Zcaron","zcaron","brokenbar","Eth","eth","Yacute","yacute","Thorn",
+  "thorn","minus","multiply","onesuperior","twosuperior","threesuperior",
+  "onehalf","onequarter","threequarters","franc","Gbreve","gbreve",
+  "Idotaccent","Scedilla","scedilla","Cacute","cacute","Ccaron","ccaron",
+  "dcroat",
+}
+local weights={
+  [100]="thin",
+  [200]="extralight",
+  [300]="light",
+  [400]="normal",
+  [500]="medium",
+  [600]="semibold",
+  [700]="bold",
+  [800]="extrabold",
+  [900]="black",
+}
+local widths={
+  [1]="ultracondensed",
+  [2]="extracondensed",
+  [3]="condensed",
+  [4]="semicondensed",
+  [5]="normal",
+  [6]="semiexpanded",
+  [7]="expanded",
+  [8]="extraexpanded",
+  [9]="ultraexpanded",
+}
+setmetatableindex(weights,function(t,k)
+  local r=floor((k+50)/100)*100
+  local v=(r>900 and "black") or rawget(t,r) or "normal"
+  return v
+end)
+setmetatableindex(widths,function(t,k)
+  return "normal"
+end)
+local panoseweights={
+  [ 0]="normal",
+  [ 1]="normal",
+  [ 2]="verylight",
+  [ 3]="light",
+  [ 4]="thin",
+  [ 5]="book",
+  [ 6]="medium",
+  [ 7]="demi",
+  [ 8]="bold",
+  [ 9]="heavy",
+  [10]="black",
+}
+local panosewidths={
+  [ 0]="normal",
+  [ 1]="normal",
+  [ 2]="normal",
+  [ 3]="normal",
+  [ 4]="normal",
+  [ 5]="expanded",
+  [ 6]="condensed",
+  [ 7]="veryexpanded",
+  [ 8]="verycondensed",
+  [ 9]="monospaced",
+}
+local helpers={}
+readers.helpers=helpers
+local function gotodatatable(f,fontdata,tag,criterium)
+  if criterium and f then
+    local datatable=fontdata.tables[tag]
+    if datatable then
+      local tableoffset=datatable.offset
+      setposition(f,tableoffset)
+      return tableoffset
+    end
+  end
+end
+local function reportskippedtable(f,fontdata,tag,criterium)
+  if criterium and f then
+    local datatable=fontdata.tables[tag]
+    if datatable then
+      report("loading of table %a skipped",tag)
+    end
+  end
+end
+local function setvariabledata(fontdata,tag,data)
+  local variabledata=fontdata.variabledata
+  if variabledata then
+    variabledata[tag]=data
+  else
+    fontdata.variabledata={ [tag]=data }
+  end
+end
+helpers.gotodatatable=gotodatatable
+helpers.setvariabledata=setvariabledata
+helpers.reportskippedtable=reportskippedtable
+local platformnames={
+  postscriptname=true,
+  fullname=true,
+  family=true,
+  subfamily=true,
+  typographicfamily=true,
+  typographicsubfamily=true,
+  compatiblefullname=true,
+}
+function readers.name(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"name",true)
+  if tableoffset then
+    local format=readushort(f)
+    local nofnames=readushort(f)
+    local offset=readushort(f)
+    local start=tableoffset+offset
+    local namelists={
+      unicode={},
+      windows={},
+      macintosh={},
+    }
+    for i=1,nofnames do
+      local platform=platforms[readushort(f)]
+      if platform then
+        local namelist=namelists[platform]
+        if namelist then
+          local encoding=readushort(f)
+          local language=readushort(f)
+          local encodings=encodings[platform]
+          local languages=languages[platform]
+          if encodings and languages then
+            local encoding=encodings[encoding]
+            local language=languages[language]
+            if encoding and language then
+              local index=readushort(f)
+              local name=reservednames[index]
+              namelist[#namelist+1]={
+                platform=platform,
+                encoding=encoding,
+                language=language,
+                name=name,
+                index=index,
+                length=readushort(f),
+                offset=start+readushort(f),
+              }
+            else
+              skipshort(f,3)
+            end
+          else
+            skipshort(f,3)
+          end
+        else
+          skipshort(f,5)
+        end
+      else
+        skipshort(f,5)
+      end
+    end
+    local names={}
+    local done={}
+    local extras={}
+    local function filter(platform,e,l)
+      local namelist=namelists[platform]
+      for i=1,#namelist do
+        local name=namelist[i]
+        local nametag=name.name
+        local index=name.index
+        if not done[nametag or i] then
+          local encoding=name.encoding
+          local language=name.language
+          if (not e or encoding==e) and (not l or language==l) then
+            setposition(f,name.offset)
+            local content=readstring(f,name.length)
+            local decoder=decoders[platform]
+            if decoder then
+              decoder=decoder[encoding]
+            end
+            if decoder then
+              content=decoder(content)
+            end
+            if nametag then
+              names[nametag]={
+                content=content,
+                platform=platform,
+                encoding=encoding,
+                language=language,
+              }
+            end
+            extras[index]=content
+            done[nametag or i]=true
+          end
+        end
+      end
+    end
+    filter("windows","unicode bmp","english - united states")
+    filter("macintosh","roman","english")
+    filter("windows")
+    filter("macintosh")
+    filter("unicode")
+    fontdata.names=names
+    fontdata.extras=extras
+    if specification.platformnames then
+      local collected={}
+      for platform,namelist in next,namelists do
+        local filtered=false
+        for i=1,#namelist do
+          local entry=namelist[i]
+          local name=entry.name
+          if platformnames[name] then
+            setposition(f,entry.offset)
+            local content=readstring(f,entry.length)
+            local encoding=entry.encoding
+            local decoder=decoders[platform]
+            if decoder then
+              decoder=decoder[encoding]
+            end
+            if decoder then
+              content=decoder(content)
+            end
+            if filtered then
+              filtered[name]=content
+            else
+              filtered={ [name]=content }
+            end
+          end
+        end
+        if filtered then
+          collected[platform]=filtered
+        end
+      end
+      fontdata.platformnames=collected
+    end
+  else
+    fontdata.names={}
+  end
+end
+local validutf=lpeg.patterns.validutf8
+local function getname(fontdata,key)
+  local names=fontdata.names
+  if names then
+    local value=names[key]
+    if value then
+      local content=value.content
+      return lpegmatch(validutf,content) and content or nil
+    end
+  end
+end
+readers["os/2"]=function(f,fontdata)
+  local tableoffset=gotodatatable(f,fontdata,"os/2",true)
+  if tableoffset then
+    local version=readushort(f)
+    local windowsmetrics={
+      version=version,
+      averagewidth=readshort(f),
+      weightclass=readushort(f),
+      widthclass=readushort(f),
+      fstype=readushort(f),
+      subscriptxsize=readshort(f),
+      subscriptysize=readshort(f),
+      subscriptxoffset=readshort(f),
+      subscriptyoffset=readshort(f),
+      superscriptxsize=readshort(f),
+      superscriptysize=readshort(f),
+      superscriptxoffset=readshort(f),
+      superscriptyoffset=readshort(f),
+      strikeoutsize=readshort(f),
+      strikeoutpos=readshort(f),
+      familyclass=readshort(f),
+      panose={ readbytes(f,10) },
+      unicoderanges={ readulong(f),readulong(f),readulong(f),readulong(f) },
+      vendor=readstring(f,4),
+      fsselection=readushort(f),
+      firstcharindex=readushort(f),
+      lastcharindex=readushort(f),
+      typoascender=readshort(f),
+      typodescender=readshort(f),
+      typolinegap=readshort(f),
+      winascent=readushort(f),
+      windescent=readushort(f),
+    }
+    if version>=1 then
+      windowsmetrics.codepageranges={ readulong(f),readulong(f) }
+    end
+    if version>=3 then
+      windowsmetrics.xheight=readshort(f)
+      windowsmetrics.capheight=readshort(f)
+      windowsmetrics.defaultchar=readushort(f)
+      windowsmetrics.breakchar=readushort(f)
+    end
+    windowsmetrics.weight=windowsmetrics.weightclass and weights[windowsmetrics.weightclass]
+    windowsmetrics.width=windowsmetrics.widthclass and widths [windowsmetrics.widthclass]
+    windowsmetrics.panoseweight=panoseweights[windowsmetrics.panose[3]]
+    windowsmetrics.panosewidth=panosewidths [windowsmetrics.panose[4]]
+    fontdata.windowsmetrics=windowsmetrics
+  else
+    fontdata.windowsmetrics={}
+  end
+end
+readers.head=function(f,fontdata)
+  local tableoffset=gotodatatable(f,fontdata,"head",true)
+  if tableoffset then
+    local fontheader={
+      version=readfixed(f),
+      revision=readfixed(f),
+      checksum=readulong(f),
+      magic=readulong(f),
+      flags=readushort(f),
+      units=readushort(f),
+      created=readlongdatetime(f),
+      modified=readlongdatetime(f),
+      xmin=readshort(f),
+      ymin=readshort(f),
+      xmax=readshort(f),
+      ymax=readshort(f),
+      macstyle=readushort(f),
+      smallpixels=readushort(f),
+      directionhint=readshort(f),
+      indextolocformat=readshort(f),
+      glyphformat=readshort(f),
+    }
+    fontdata.fontheader=fontheader
+  else
+    fontdata.fontheader={}
+  end
+  fontdata.nofglyphs=0
+end
+readers.hhea=function(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"hhea",specification.details)
+  if tableoffset then
+    fontdata.horizontalheader={
+      version=readfixed(f),
+      ascender=readfword(f),
+      descender=readfword(f),
+      linegap=readfword(f),
+      maxadvancewidth=readufword(f),
+      minleftsidebearing=readfword(f),
+      minrightsidebearing=readfword(f),
+      maxextent=readfword(f),
+      caretsloperise=readshort(f),
+      caretsloperun=readshort(f),
+      caretoffset=readshort(f),
+      reserved_1=readshort(f),
+      reserved_2=readshort(f),
+      reserved_3=readshort(f),
+      reserved_4=readshort(f),
+      metricdataformat=readshort(f),
+      nofmetrics=readushort(f),
+    }
+  else
+    fontdata.horizontalheader={
+      nofmetrics=0,
+    }
+  end
+end
+readers.vhea=function(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"vhea",specification.details)
+  if tableoffset then
+    fontdata.verticalheader={
+      version=readfixed(f),
+      ascender=readfword(f),
+      descender=readfword(f),
+      linegap=readfword(f),
+      maxadvanceheight=readufword(f),
+      mintopsidebearing=readfword(f),
+      minbottomsidebearing=readfword(f),
+      maxextent=readfword(f),
+      caretsloperise=readshort(f),
+      caretsloperun=readshort(f),
+      caretoffset=readshort(f),
+      reserved_1=readshort(f),
+      reserved_2=readshort(f),
+      reserved_3=readshort(f),
+      reserved_4=readshort(f),
+      metricdataformat=readshort(f),
+      nofmetrics=readushort(f),
+    }
+  else
+    fontdata.verticalheader={
+      nofmetrics=0,
+    }
+  end
+end
+readers.maxp=function(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"maxp",specification.details)
+  if tableoffset then
+    local version=readfixed(f)
+    local nofglyphs=readushort(f)
+    fontdata.nofglyphs=nofglyphs
+    if version==0.5 then
+      fontdata.maximumprofile={
+        version=version,
+        nofglyphs=nofglyphs,
+      }
+    elseif version==1.0 then
+      fontdata.maximumprofile={
+        version=version,
+        nofglyphs=nofglyphs,
+        points=readushort(f),
+        contours=readushort(f),
+        compositepoints=readushort(f),
+        compositecontours=readushort(f),
+        zones=readushort(f),
+        twilightpoints=readushort(f),
+        storage=readushort(f),
+        functiondefs=readushort(f),
+        instructiondefs=readushort(f),
+        stackelements=readushort(f),
+        sizeofinstructions=readushort(f),
+        componentelements=readushort(f),
+        componentdepth=readushort(f),
+      }
+    else
+      fontdata.maximumprofile={
+        version=version,
+        nofglyphs=0,
+      }
+    end
+  end
+end
+readers.hmtx=function(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"hmtx",specification.glyphs)
+  if tableoffset then
+    local horizontalheader=fontdata.horizontalheader
+    local nofmetrics=horizontalheader.nofmetrics
+    local glyphs=fontdata.glyphs
+    local nofglyphs=fontdata.nofglyphs
+    local width=0 
+    local leftsidebearing=0
+    for i=0,nofmetrics-1 do
+      local glyph=glyphs[i]
+      width=readshort(f)
+      leftsidebearing=readshort(f)
+      if width~=0 then
+        glyph.width=width
+      end
+    end
+    for i=nofmetrics,nofglyphs-1 do
+      local glyph=glyphs[i]
+      if width~=0 then
+        glyph.width=width
+      end
+    end
+  end
+end
+readers.vmtx=function(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"vmtx",specification.glyphs)
+  if tableoffset then
+    local verticalheader=fontdata.verticalheader
+    local nofmetrics=verticalheader.nofmetrics
+    local glyphs=fontdata.glyphs
+    local nofglyphs=fontdata.nofglyphs
+    local vheight=0
+    local vdefault=verticalheader.ascender+verticalheader.descender
+    local topsidebearing=0
+    for i=0,nofmetrics-1 do
+      local glyph=glyphs[i]
+      vheight=readshort(f)
+      topsidebearing=readshort(f)
+      if vheight~=0 and vheight~=vdefault then
+        glyph.vheight=vheight
+      end
+    end
+    for i=nofmetrics,nofglyphs-1 do
+      local glyph=glyphs[i]
+      if vheight~=0 and vheight~=vdefault then
+        glyph.vheight=vheight
+      end
+    end
+  end
+end
+readers.vorg=function(f,fontdata,specification)
+  reportskippedtable(f,fontdata,"vorg",specification.glyphs)
+end
+readers.post=function(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"post",true)
+  if tableoffset then
+    local version=readfixed(f)
+    fontdata.postscript={
+      version=version,
+      italicangle=round(1000*readfixed(f))/1000,
+      underlineposition=readfword(f),
+      underlinethickness=readfword(f),
+      monospaced=readulong(f),
+      minmemtype42=readulong(f),
+      maxmemtype42=readulong(f),
+      minmemtype1=readulong(f),
+      maxmemtype1=readulong(f),
+    }
+    if not specification.glyphs then
+    elseif version==1.0 then
+      for index=0,#standardromanencoding do
+        glyphs[index].name=standardromanencoding[index]
+      end
+    elseif version==2.0 then
+      local glyphs=fontdata.glyphs
+      local nofglyphs=readushort(f)
+      local indices={}
+      local names={}
+      local maxnames=0
+      for i=0,nofglyphs-1 do
+        local nameindex=readushort(f)
+        if nameindex>=258 then
+          maxnames=maxnames+1
+          nameindex=nameindex-257
+          indices[nameindex]=i
+        else
+          glyphs[i].name=standardromanencoding[nameindex]
+        end
+      end
+      for i=1,maxnames do
+        local mapping=indices[i]
+        if not mapping then
+          report("quit post name fetching at %a of %a: %s",i,maxnames,"no index")
+          break
+        else
+          local length=readbyte(f)
+          if length>0 then
+            glyphs[mapping].name=readstring(f,length)
+          else
+            report("quit post name fetching at %a of %a: %s",i,maxnames,"overflow")
+            break
+          end
+        end
+      end
+    elseif version==2.5 then
+    elseif version==3.0 then
+    end
+  else
+    fontdata.postscript={}
+  end
+end
+readers.cff=function(f,fontdata,specification)
+  reportskippedtable(f,fontdata,"cff",specification.glyphs)
+end
+local formatreaders={}
+local duplicatestoo=true
+local sequence={
+  { 3,1,4 },
+  { 3,10,12 },
+  { 0,3,4 },
+  { 0,1,4 },
+  { 0,0,6 },
+  { 3,0,6 },
+  { 0,5,14 },
+{ 0,4,12 },
+  { 3,10,13 },
+}
+local supported={}
+for i=1,#sequence do
+  local si=sequence[i]
+  local sp,se,sf=si[1],si[2],si[3]
+  local p=supported[sp]
+  if not p then
+    p={}
+    supported[sp]=p
+  end
+  local e=p[se]
+  if not e then
+    e={}
+    p[se]=e
+  end
+  e[sf]=true
+end
+formatreaders[4]=function(f,fontdata,offset)
+  setposition(f,offset+2)
+  local length=readushort(f) 
+  local language=readushort(f)
+  local nofsegments=readushort(f)/2
+  skipshort(f,3)
+  local endchars={}
+  local startchars={}
+  local deltas={}
+  local offsets={}
+  local indices={}
+  local mapping=fontdata.mapping
+  local glyphs=fontdata.glyphs
+  local duplicates=fontdata.duplicates
+  local nofdone=0
+  for i=1,nofsegments do
+    endchars[i]=readushort(f)
+  end
+  local reserved=readushort(f) 
+  for i=1,nofsegments do
+    startchars[i]=readushort(f)
+  end
+  for i=1,nofsegments do
+    deltas[i]=readshort(f)
+  end
+  for i=1,nofsegments do
+    offsets[i]=readushort(f)
+  end
+  local size=(length-2*2-5*2-4*nofsegments*2)/2
+  for i=1,size-1 do
+    indices[i]=readushort(f)
+  end
+  for segment=1,nofsegments do
+    local startchar=startchars[segment]
+    local endchar=endchars[segment]
+    local offset=offsets[segment]
+    local delta=deltas[segment]
+    if startchar==0xFFFF and endchar==0xFFFF then
+    elseif startchar==0xFFFF and offset==0 then
+    elseif offset==0xFFFF then
+    elseif offset==0 then
+      if trace_cmap_detail then
+        report("format 4.%i segment %2i from %C upto %C at index %H",1,segment,startchar,endchar,(startchar+delta)%65536)
+      end
+      for unicode=startchar,endchar do
+        local index=(unicode+delta)%65536
+        if index and index>0 then
+          local glyph=glyphs[index]
+          if glyph then
+            local gu=glyph.unicode
+            if not gu then
+              glyph.unicode=unicode
+              nofdone=nofdone+1
+            elseif gu~=unicode then
+              if duplicatestoo then
+                local d=duplicates[gu]
+                if d then
+                  d[unicode]=true
+                else
+                  duplicates[gu]={ [unicode]=true }
+                end
+              else
+                report("duplicate case 1: %C %04i %s",unicode,index,glyphs[index].name)
+              end
+            end
+            if not mapping[index] then
+              mapping[index]=unicode
+            end
+          end
+        end
+      end
+    else
+      local shift=(segment-nofsegments+offset/2)-startchar
+      if trace_cmap_detail then
+        report("format 4.%i segment %2i from %C upto %C at index %H",0,segment,startchar,endchar,(startchar+delta)%65536)
+      end
+      for unicode=startchar,endchar do
+        local slot=shift+unicode
+        local index=indices[slot]
+        if index and index>0 then
+          index=(index+delta)%65536
+          local glyph=glyphs[index]
+          if glyph then
+            local gu=glyph.unicode
+            if not gu then
+              glyph.unicode=unicode
+              nofdone=nofdone+1
+            elseif gu~=unicode then
+              if duplicatestoo then
+                local d=duplicates[gu]
+                if d then
+                  d[unicode]=true
+                else
+                  duplicates[gu]={ [unicode]=true }
+                end
+              else
+                report("duplicate case 2: %C %04i %s",unicode,index,glyphs[index].name)
+              end
+            end
+            if not mapping[index] then
+              mapping[index]=unicode
+            end
+          end
+        end
+      end
+    end
+  end
+  return nofdone
+end
+formatreaders[6]=function(f,fontdata,offset)
+  setposition(f,offset) 
+  local format=readushort(f)
+  local length=readushort(f)
+  local language=readushort(f)
+  local mapping=fontdata.mapping
+  local glyphs=fontdata.glyphs
+  local duplicates=fontdata.duplicates
+  local start=readushort(f)
+  local count=readushort(f)
+  local stop=start+count-1
+  local nofdone=0
+  if trace_cmap_detail then
+    report("format 6 from %C to %C",2,start,stop)
+  end
+  for unicode=start,stop do
+    local index=readushort(f)
+    if index>0 then
+      local glyph=glyphs[index]
+      if glyph then
+        local gu=glyph.unicode
+        if not gu then
+          glyph.unicode=unicode
+          nofdone=nofdone+1
+        elseif gu~=unicode then
+        end
+        if not mapping[index] then
+          mapping[index]=unicode
+        end
+      end
+    end
+  end
+  return nofdone
+end
+formatreaders[12]=function(f,fontdata,offset)
+  setposition(f,offset+2+2+4+4) 
+  local mapping=fontdata.mapping
+  local glyphs=fontdata.glyphs
+  local duplicates=fontdata.duplicates
+  local nofgroups=readulong(f)
+  local nofdone=0
+  for i=1,nofgroups do
+    local first=readulong(f)
+    local last=readulong(f)
+    local index=readulong(f)
+    if trace_cmap_detail then
+      report("format 12 from %C to %C starts at index %i",first,last,index)
+    end
+    for unicode=first,last do
+      local glyph=glyphs[index]
+      if glyph then
+        local gu=glyph.unicode
+        if not gu then
+          glyph.unicode=unicode
+          nofdone=nofdone+1
+        elseif gu~=unicode then
+          local d=duplicates[gu]
+          if d then
+            d[unicode]=true
+          else
+            duplicates[gu]={ [unicode]=true }
+          end
+        end
+        if not mapping[index] then
+          mapping[index]=unicode
+        end
+      end
+      index=index+1
+    end
+  end
+  return nofdone
+end
+formatreaders[13]=function(f,fontdata,offset)
+  setposition(f,offset+2+2+4+4) 
+  local mapping=fontdata.mapping
+  local glyphs=fontdata.glyphs
+  local duplicates=fontdata.duplicates
+  local nofgroups=readulong(f)
+  local nofdone=0
+  for i=1,nofgroups do
+    local first=readulong(f)
+    local last=readulong(f)
+    local index=readulong(f)
+    if first<privateoffset then
+      if trace_cmap_detail then
+        report("format 13 from %C to %C get index %i",first,last,index)
+      end
+      local glyph=glyphs[index]
+      local unicode=glyph.unicode
+      if not unicode then
+        unicode=first
+        glyph.unicode=unicode
+        first=first+1
+      end
+      local list=duplicates[unicode]
+      mapping[index]=unicode
+      if not list then
+        list={}
+        duplicates[unicode]=list
+      end
+      if last>=privateoffset then
+        local limit=privateoffset-1
+        report("format 13 from %C to %C pruned to %C",first,last,limit)
+        last=limit
+      end
+      for unicode=first,last do
+        list[unicode]=true
+      end
+      nofdone=nofdone+last-first+1
+    else
+      report("format 13 from %C to %C ignored",first,last)
+    end
+  end
+  return nofdone
+end
+formatreaders[14]=function(f,fontdata,offset)
+  if offset and offset~=0 then
+    setposition(f,offset)
+    local format=readushort(f)
+    local length=readulong(f)
+    local nofrecords=readulong(f)
+    local records={}
+    local variants={}
+    local nofdone=0
+    fontdata.variants=variants
+    for i=1,nofrecords do
+      records[i]={
+        selector=readuint(f),
+        default=readulong(f),
+        other=readulong(f),
+      }
+    end
+    for i=1,nofrecords do
+      local record=records[i]
+      local selector=record.selector
+      local default=record.default
+      local other=record.other
+      local other=record.other
+      if other~=0 then
+        setposition(f,offset+other)
+        local mapping={}
+        local count=readulong(f)
+        for i=1,count do
+          mapping[readuint(f)]=readushort(f)
+        end
+        nofdone=nofdone+count
+        variants[selector]=mapping
+      end
+    end
+    return nofdone
+  else
+    return 0
+  end
+end
+local function checkcmap(f,fontdata,records,platform,encoding,format)
+  local data=records[platform]
+  if not data then
+    return 0
+  end
+  data=data[encoding]
+  if not data then
+    return 0
+  end
+  data=data[format]
+  if not data then
+    return 0
+  end
+  local reader=formatreaders[format]
+  if not reader then
+    return 0
+  end
+  local p=platforms[platform]
+  local e=encodings[p]
+  local n=reader(f,fontdata,data) or 0
+  if trace_cmap then
+    report("cmap checked: platform %i (%s), encoding %i (%s), format %i, new unicodes %i",platform,p,encoding,e and e[encoding] or "?",format,n)
+  end
+  return n
+end
+function readers.cmap(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"cmap",specification.glyphs)
+  if tableoffset then
+    local version=readushort(f)
+    local noftables=readushort(f)
+    local records={}
+    local unicodecid=false
+    local variantcid=false
+    local variants={}
+    local duplicates=fontdata.duplicates or {}
+    fontdata.duplicates=duplicates
+    for i=1,noftables do
+      local platform=readushort(f)
+      local encoding=readushort(f)
+      local offset=readulong(f)
+      local record=records[platform]
+      if not record then
+        records[platform]={
+          [encoding]={
+            offsets={ offset },
+            formats={},
+          }
+        }
+      else
+        local subtables=record[encoding]
+        if not subtables then
+          record[encoding]={
+            offsets={ offset },
+            formats={},
+          }
+        else
+          local offsets=subtables.offsets
+          offsets[#offsets+1]=offset
+        end
+      end
+    end
+    if trace_cmap then
+      report("found cmaps:")
+    end
+    for platform,record in sortedhash(records) do
+      local p=platforms[platform]
+      local e=encodings[p]
+      local sp=supported[platform]
+      local ps=p or "?"
+      if trace_cmap then
+        if sp then
+          report("  platform %i: %s",platform,ps)
+        else
+          report("  platform %i: %s (unsupported)",platform,ps)
+        end
+      end
+      for encoding,subtables in sortedhash(record) do
+        local se=sp and sp[encoding]
+        local es=e and e[encoding] or "?"
+        if trace_cmap then
+          if se then
+            report("    encoding %i: %s",encoding,es)
+          else
+            report("    encoding %i: %s (unsupported)",encoding,es)
+          end
+        end
+        local offsets=subtables.offsets
+        local formats=subtables.formats
+        for i=1,#offsets do
+          local offset=tableoffset+offsets[i]
+          setposition(f,offset)
+          formats[readushort(f)]=offset
+        end
+        record[encoding]=formats
+        if trace_cmap then
+          local list=sortedkeys(formats)
+          for i=1,#list do
+            if not (se and se[list[i]]) then
+              list[i]=list[i].." (unsupported)"
+            end
+          end
+          report("      formats: % t",list)
+        end
+      end
+    end
+    local ok=false
+    for i=1,#sequence do
+      local si=sequence[i]
+      local sp,se,sf=si[1],si[2],si[3]
+      if checkcmap(f,fontdata,records,sp,se,sf)>0 then
+        ok=true
+      end
+    end
+    if not ok then
+      report("no useable unicode cmap found")
+    end
+    fontdata.cidmaps={
+      version=version,
+      noftables=noftables,
+      records=records,
+    }
+  else
+    fontdata.cidmaps={}
+  end
+end
+function readers.loca(f,fontdata,specification)
+  reportskippedtable(f,fontdata,"loca",specification.glyphs)
+end
+function readers.glyf(f,fontdata,specification) 
+  reportskippedtable(f,fontdata,"glyf",specification.glyphs)
+end
+function readers.colr(f,fontdata,specification)
+  reportskippedtable(f,fontdata,"colr",specification.glyphs)
+end
+function readers.cpal(f,fontdata,specification)
+  reportskippedtable(f,fontdata,"cpal",specification.glyphs)
+end
+function readers.svg(f,fontdata,specification)
+  reportskippedtable(f,fontdata,"svg",specification.glyphs)
+end
+function readers.sbix(f,fontdata,specification)
+  reportskippedtable(f,fontdata,"sbix",specification.glyphs)
+end
+function readers.cbdt(f,fontdata,specification)
+  reportskippedtable(f,fontdata,"cbdt",specification.glyphs)
+end
+function readers.cblc(f,fontdata,specification)
+  reportskippedtable(f,fontdata,"cblc",specification.glyphs)
+end
+function readers.ebdt(f,fontdata,specification)
+  reportskippedtable(f,fontdata,"ebdt",specification.glyphs)
+end
+function readers.ebsc(f,fontdata,specification)
+  reportskippedtable(f,fontdata,"ebsc",specification.glyphs)
+end
+function readers.eblc(f,fontdata,specification)
+  reportskippedtable(f,fontdata,"eblc",specification.glyphs)
+end
+function readers.kern(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"kern",specification.kerns)
+  if tableoffset then
+    local version=readushort(f)
+    local noftables=readushort(f)
+    for i=1,noftables do
+      local version=readushort(f)
+      local length=readushort(f)
+      local coverage=readushort(f)
+      local format=bit32.rshift(coverage,8) 
+      if format==0 then
+        local nofpairs=readushort(f)
+        local searchrange=readushort(f)
+        local entryselector=readushort(f)
+        local rangeshift=readushort(f)
+        local kerns={}
+        local glyphs=fontdata.glyphs
+        for i=1,nofpairs do
+          local left=readushort(f)
+          local right=readushort(f)
+          local kern=readfword(f)
+          local glyph=glyphs[left]
+          local kerns=glyph.kerns
+          if kerns then
+            kerns[right]=kern
+          else
+            glyph.kerns={ [right]=kern }
+          end
+        end
+      elseif format==2 then
+        report("todo: kern classes")
+      else
+        report("todo: kerns")
+      end
+    end
+  end
+end
+function readers.gdef(f,fontdata,specification)
+  reportskippedtable(f,fontdata,"gdef",specification.details)
+end
+function readers.gsub(f,fontdata,specification)
+  reportskippedtable(f,fontdata,"gsub",specification.details)
+end
+function readers.gpos(f,fontdata,specification)
+  reportskippedtable(f,fontdata,"gpos",specification.details)
+end
+function readers.math(f,fontdata,specification)
+  reportskippedtable(f,fontdata,"math",specification.details)
+end
+local function getinfo(maindata,sub,platformnames,rawfamilynames,metricstoo,instancenames)
+  local fontdata=sub and maindata.subfonts and maindata.subfonts[sub] or maindata
+  local names=fontdata.names
+  local info=nil
+  if names then
+    local metrics=fontdata.windowsmetrics or {}
+    local postscript=fontdata.postscript   or {}
+    local fontheader=fontdata.fontheader   or {}
+    local cffinfo=fontdata.cffinfo    or {}
+    local filename=fontdata.filename
+    local weight=getname(fontdata,"weight") or (cffinfo and cffinfo.weight) or (metrics and metrics.weight)
+    local width=getname(fontdata,"width") or (cffinfo and cffinfo.width ) or (metrics and metrics.width )
+    local fontname=getname(fontdata,"postscriptname")
+    local fullname=getname(fontdata,"fullname")
+    local family=getname(fontdata,"family")
+    local subfamily=getname(fontdata,"subfamily")
+    local familyname=getname(fontdata,"typographicfamily")
+    local subfamilyname=getname(fontdata,"typographicsubfamily")
+    local compatiblename=getname(fontdata,"compatiblefullname") 
+    if rawfamilynames then
+    else
+      if not  familyname then  familyname=family end
+      if not subfamilyname then subfamilyname=subfamily end
+    end
+    if platformnames then
+      platformnames=fontdata.platformnames
+    end
+    if instancenames then
+      local variabledata=fontdata.variabledata
+      if variabledata then
+        local instances=variabledata and variabledata.instances
+        if instances then
+          instancenames={}
+          for i=1,#instances do
+            instancenames[i]=lower(stripstring(instances[i].subfamily))
+          end
+        else
+          instancenames=nil
+        end
+      else
+        instancenames=nil
+      end
+    end
+    info={ 
+      subfontindex=fontdata.subfontindex or sub or 0,
+      version=getname(fontdata,"version"),
+      fontname=fontname,
+      fullname=fullname,
+      family=family,
+      subfamily=subfamily,
+      familyname=familyname,
+      subfamilyname=subfamilyname,
+      compatiblename=compatiblename,
+      weight=weight and lower(weight),
+      width=width and lower(width),
+      pfmweight=metrics.weightclass or 400,
+      pfmwidth=metrics.widthclass or 5,
+      panosewidth=metrics.panosewidth,
+      panoseweight=metrics.panoseweight,
+      italicangle=postscript.italicangle or 0,
+      units=fontheader.units or 0,
+      designsize=fontdata.designsize,
+      minsize=fontdata.minsize,
+      maxsize=fontdata.maxsize,
+      monospaced=(tonumber(postscript.monospaced or 0)>0) or metrics.panosewidth=="monospaced",
+      averagewidth=metrics.averagewidth,
+      xheight=metrics.xheight,
+      capheight=metrics.capheight,
+      ascender=metrics.typoascender,
+      descender=metrics.typodescender,
+      platformnames=platformnames or nil,
+      instancenames=instancenames or nil,
+    }
+    if metricstoo then
+      local keys={
+        "version",
+        "ascender","descender","linegap",
+        "maxadvancewidth","maxadvanceheight","maxextent",
+        "minbottomsidebearing","mintopsidebearing",
+      }
+      local h=fontdata.horizontalheader or {}
+      local v=fontdata.verticalheader  or {}
+      if h then
+        local th={}
+        local tv={}
+        for i=1,#keys do
+          local key=keys[i]
+          th[key]=h[key] or 0
+          tv[key]=v[key] or 0
+        end
+        info.horizontalmetrics=th
+        info.verticalmetrics=tv
+      end
+    end
+  elseif n then
+    info={
+      filename=fontdata.filename,
+      comment="there is no info for subfont "..n,
+    }
+  else
+    info={
+      filename=fontdata.filename,
+      comment="there is no info",
+    }
+  end
+  return info
+end
+local function loadtables(f,specification,offset)
+  if offset then
+    setposition(f,offset)
+  end
+  local tables={}
+  local basename=file.basename(specification.filename)
+  local filesize=specification.filesize
+  local filetime=specification.filetime
+  local fontdata={ 
+    filename=basename,
+    filesize=filesize,
+    filetime=filetime,
+    version=readstring(f,4),
+    noftables=readushort(f),
+    searchrange=readushort(f),
+    entryselector=readushort(f),
+    rangeshift=readushort(f),
+    tables=tables,
+    foundtables=false,
+  }
+  for i=1,fontdata.noftables do
+    local tag=lower(stripstring(readstring(f,4)))
+    local checksum=readulong(f) 
+    local offset=readulong(f)
+    local length=readulong(f)
+    if offset+length>filesize then
+      report("bad %a table in file %a",tag,basename)
+    end
+    tables[tag]={
+      checksum=checksum,
+      offset=offset,
+      length=length,
+    }
+  end
+  fontdata.foundtables=sortedkeys(tables)
+  if tables.cff or tables.cff2 then
+    fontdata.format="opentype"
+  else
+    fontdata.format="truetype"
+  end
+  return fontdata
+end
+local function prepareglyps(fontdata)
+  local glyphs=setmetatableindex(function(t,k)
+    local v={
+      index=k,
+    }
+    t[k]=v
+    return v
+  end)
+  fontdata.glyphs=glyphs
+  fontdata.mapping={}
+end
+local function readtable(tag,f,fontdata,specification,...)
+  local reader=readers[tag]
+  if reader then
+    reader(f,fontdata,specification,...)
+  end
+end
+local variablefonts_supported=(context and true) or (logs and logs.application and true) or false
+local function readdata(f,offset,specification)
+  local fontdata=loadtables(f,specification,offset)
+  if specification.glyphs then
+    prepareglyps(fontdata)
+  end
+  if not variablefonts_supported then
+    specification.instance=nil
+    specification.variable=nil
+    specification.factors=nil
+  end
+  fontdata.temporary={}
+  readtable("name",f,fontdata,specification)
+  local askedname=specification.askedname
+  if askedname then
+    local fullname=getname(fontdata,"fullname") or ""
+    local cleanname=gsub(askedname,"[^a-zA-Z0-9]","")
+    local foundname=gsub(fullname,"[^a-zA-Z0-9]","")
+    if lower(cleanname)~=lower(foundname) then
+      return 
+    end
+  end
+  readtable("stat",f,fontdata,specification)
+  readtable("avar",f,fontdata,specification)
+  readtable("fvar",f,fontdata,specification)
+  if variablefonts_supported then
+    local variabledata=fontdata.variabledata
+    if variabledata then
+      local instances=variabledata.instances
+      local axis=variabledata.axis
+      if axis and (not instances or #instances==0) then
+        instances={}
+        variabledata.instances=instances
+        local function add(n,subfamily,value)
+          local values={}
+          for i=1,#axis do
+            local a=axis[i]
+            values[i]={
+              axis=a.tag,
+              value=i==n and value or a.default,
+            }
+          end
+          instances[#instances+1]={
+            subfamily=subfamily,
+            values=values,
+          }
+        end
+        for i=1,#axis do
+          local a=axis[i]
+          local tag=a.tag
+          add(i,"default"..tag,a.default)
+          add(i,"minimum"..tag,a.minimum)
+          add(i,"maximum"..tag,a.maximum)
+        end
+      end
+    end
+    if not specification.factors then
+      local instance=specification.instance
+      if type(instance)=="string" then
+        local factors=helpers.getfactors(fontdata,instance)
+        if factors then
+          specification.factors=factors
+          fontdata.factors=factors
+          fontdata.instance=instance
+          report("user instance: %s, factors: % t",instance,factors)
+        else
+          report("user instance: %s, bad factors",instance)
+        end
+      end
+    end
+    if not fontdata.factors then
+      if fontdata.variabledata then
+        local factors=helpers.getfactors(fontdata,true)
+        if factors then
+          specification.factors=factors
+          fontdata.factors=factors
+          report("factors: % t",factors)
+        else
+          report("bad factors")
+        end
+      else
+      end
+    end
+  end
+  readtable("os/2",f,fontdata,specification)
+  readtable("head",f,fontdata,specification)
+  readtable("maxp",f,fontdata,specification)
+  readtable("hhea",f,fontdata,specification)
+  readtable("vhea",f,fontdata,specification)
+  readtable("hmtx",f,fontdata,specification)
+  readtable("vmtx",f,fontdata,specification)
+  readtable("vorg",f,fontdata,specification)
+  readtable("post",f,fontdata,specification)
+  readtable("mvar",f,fontdata,specification)
+  readtable("hvar",f,fontdata,specification)
+  readtable("vvar",f,fontdata,specification)
+  readtable("gdef",f,fontdata,specification)
+  readtable("cff",f,fontdata,specification)
+  readtable("cff2",f,fontdata,specification)
+  readtable("cmap",f,fontdata,specification)
+  readtable("loca",f,fontdata,specification) 
+  readtable("glyf",f,fontdata,specification) 
+  readtable("colr",f,fontdata,specification)
+  readtable("cpal",f,fontdata,specification)
+  readtable("svg",f,fontdata,specification)
+  readtable("sbix",f,fontdata,specification)
+  readtable("cbdt",f,fontdata,specification)
+  readtable("cblc",f,fontdata,specification)
+  readtable("ebdt",f,fontdata,specification)
+  readtable("eblc",f,fontdata,specification)
+  readtable("kern",f,fontdata,specification)
+  readtable("gsub",f,fontdata,specification)
+  readtable("gpos",f,fontdata,specification)
+  readtable("math",f,fontdata,specification)
+  fontdata.locations=nil
+  fontdata.tables=nil
+  fontdata.cidmaps=nil
+  fontdata.dictionaries=nil
+  return fontdata
+end
+local function loadfontdata(specification)
+  local filename=specification.filename
+  local fileattr=lfs.attributes(filename)
+  local filesize=fileattr and fileattr.size or 0
+  local filetime=fileattr and fileattr.modification or 0
+  local f=openfile(filename,true) 
+  if not f then
+    report("unable to open %a",filename)
+  elseif filesize==0 then
+    report("empty file %a",filename)
+    closefile(f)
+  else
+    specification.filesize=filesize
+    specification.filetime=filetime
+    local version=readstring(f,4)
+    local fontdata=nil
+    if version=="OTTO" or version=="true" or version=="\0\1\0\0" then
+      fontdata=readdata(f,0,specification)
+    elseif version=="ttcf" then
+      local subfont=tonumber(specification.subfont)
+      local offsets={}
+      local ttcversion=readulong(f)
+      local nofsubfonts=readulong(f)
+      for i=1,nofsubfonts do
+        offsets[i]=readulong(f)
+      end
+      if subfont then 
+        if subfont>=1 and subfont<=nofsubfonts then
+          fontdata=readdata(f,offsets[subfont],specification)
+        else
+          report("no subfont %a in file %a",subfont,filename)
+        end
+      else
+        subfont=specification.subfont
+        if type(subfont)=="string" and subfont~="" then
+          specification.askedname=subfont
+          for i=1,nofsubfonts do
+            fontdata=readdata(f,offsets[i],specification)
+            if fontdata then
+              fontdata.subfontindex=i
+              report("subfont named %a has index %a",subfont,i)
+              break
+            end
+          end
+          if not fontdata then
+            report("no subfont named %a",subfont)
+          end
+        else
+          local subfonts={}
+          fontdata={
+            filename=filename,
+            filesize=filesize,
+            filetime=filetime,
+            version=version,
+            subfonts=subfonts,
+            ttcversion=ttcversion,
+            nofsubfonts=nofsubfonts,
+          }
+          for i=1,nofsubfonts do
+            subfonts[i]=readdata(f,offsets[i],specification)
+          end
+        end
+      end
+    else
+      report("unknown version %a in file %a",version,filename)
+    end
+    closefile(f)
+    return fontdata or {}
+  end
+end
+local function loadfont(specification,n,instance)
+  if type(specification)=="string" then
+    specification={
+      filename=specification,
+      info=true,
+      details=true,
+      glyphs=true,
+      shapes=true,
+      kerns=true,
+      variable=true,
+      globalkerns=true,
+      lookups=true,
+      subfont=n or true,
+      tounicode=false,
+      instance=instance
+    }
+  end
+  if specification.shapes or specification.lookups or specification.kerns then
+    specification.glyphs=true
+  end
+  if specification.glyphs then
+    specification.details=true
+  end
+  if specification.details then
+    specification.info=true 
+  end
+  if specification.platformnames then
+    specification.platformnames=true 
+  end
+  if specification.instance or instance then
+    specification.variable=true
+    specification.instance=specification.instance or instance
+  end
+  local function message(str)
+    report("fatal error in file %a: %s\n%s",specification.filename,str,debug.traceback())
+  end
+  local ok,result=xpcall(loadfontdata,message,specification)
+  if ok then
+    return result
+  end
+end
+function readers.loadshapes(filename,n,instance,streams)
+  local fontdata=loadfont {
+    filename=filename,
+    shapes=true,
+    streams=streams,
+    variable=true,
+    subfont=n,
+    instance=instance,
+  }
+  if fontdata then
+    for k,v in next,fontdata.glyphs do
+      v.class=nil
+      v.index=nil
+      v.math=nil
+    end
+  end
+  return fontdata and {
+    filename=filename,
+    format=fontdata.format,
+    glyphs=fontdata.glyphs,
+    units=fontdata.fontheader.units,
+  } or {
+    filename=filename,
+    format="unknown",
+    glyphs={},
+    units=0,
+  }
+end
+function readers.loadfont(filename,n,instance)
+  local fontdata=loadfont {
+    filename=filename,
+    glyphs=true,
+    shapes=false,
+    lookups=true,
+    variable=true,
+    subfont=n,
+    instance=instance,
+  }
+  if fontdata then
+    return {
+      tableversion=tableversion,
+      creator="context mkiv",
+      size=fontdata.filesize,
+      time=fontdata.filetime,
+      glyphs=fontdata.glyphs,
+      descriptions=fontdata.descriptions,
+      format=fontdata.format,
+      goodies={},
+      metadata=getinfo(fontdata,n,false,false,true,true),
+      properties={
+        hasitalics=fontdata.hasitalics or false,
+        maxcolorclass=fontdata.maxcolorclass,
+        hascolor=fontdata.hascolor or false,
+        instance=fontdata.instance,
+        factors=fontdata.factors,
+      },
+      resources={
+        filename=filename,
+        private=privateoffset,
+        duplicates=fontdata.duplicates or {},
+        features=fontdata.features  or {},
+        sublookups=fontdata.sublookups or {},
+        marks=fontdata.marks    or {},
+        markclasses=fontdata.markclasses or {},
+        marksets=fontdata.marksets  or {},
+        sequences=fontdata.sequences  or {},
+        variants=fontdata.variants,
+        version=getname(fontdata,"version"),
+        cidinfo=fontdata.cidinfo,
+        mathconstants=fontdata.mathconstants,
+        colorpalettes=fontdata.colorpalettes,
+        svgshapes=fontdata.svgshapes,
+        sbixshapes=fontdata.sbixshapes,
+        variabledata=fontdata.variabledata,
+        foundtables=fontdata.foundtables,
+      },
+    }
+  end
+end
+function readers.getinfo(filename,specification)
+  local subfont=nil
+  local platformnames=false
+  local rawfamilynames=false
+  local instancenames=true
+  if type(specification)=="table" then
+    subfont=tonumber(specification.subfont)
+    platformnames=specification.platformnames
+    rawfamilynames=specification.rawfamilynames
+  else
+    subfont=tonumber(specification)
+  end
+  local fontdata=loadfont {
+    filename=filename,
+    details=true,
+    platformnames=platformnames,
+    instancenames=true,
+  }
+  if fontdata then
+    local subfonts=fontdata.subfonts
+    if not subfonts then
+      return getinfo(fontdata,nil,platformnames,rawfamilynames,false,instancenames)
+    elseif not subfont then
+      local info={}
+      for i=1,#subfonts do
+        info[i]=getinfo(fontdata,i,platformnames,rawfamilynames,false,instancenames)
+      end
+      return info
+    elseif subfont>=1 and subfont<=#subfonts then
+      return getinfo(fontdata,subfont,platformnames,rawfamilynames,false,instancenames)
+    else
+      return {
+        filename=filename,
+        comment="there is no subfont "..subfont.." in this file"
+      }
+    end
+  else
+    return {
+      filename=filename,
+      comment="the file cannot be opened for reading",
+    }
+  end
+end
+function readers.rehash(fontdata,hashmethod)
+  report("the %a helper is not yet implemented","rehash")
+end
+function readers.checkhash(fontdata)
+  report("the %a helper is not yet implemented","checkhash")
+end
+function readers.pack(fontdata,hashmethod)
+  report("the %a helper is not yet implemented","pack")
+end
+function readers.unpack(fontdata)
+  report("the %a helper is not yet implemented","unpack")
+end
+function readers.expand(fontdata)
+  report("the %a helper is not yet implemented","unpack")
+end
+function readers.compact(fontdata)
+  report("the %a helper is not yet implemented","compact")
+end
+local extenders={}
+function readers.registerextender(extender)
+  extenders[#extenders+1]=extender
+end
+function readers.extend(fontdata)
+  for i=1,#extenders do
+    local extender=extenders[i]
+    local name=extender.name or "unknown"
+    local action=extender.action
+    if action then
+      action(fontdata)
+    end
+  end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-cff']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local next,type,tonumber=next,type,tonumber
+local byte,char,gmatch=string.byte,string.char,string.gmatch
+local concat,remove=table.concat,table.remove
+local floor,abs,round,ceil,min,max=math.floor,math.abs,math.round,math.ceil,math.min,math.max
+local P,C,R,S,C,Cs,Ct=lpeg.P,lpeg.C,lpeg.R,lpeg.S,lpeg.C,lpeg.Cs,lpeg.Ct
+local lpegmatch=lpeg.match
+local formatters=string.formatters
+local bytetable=string.bytetable
+local readers=fonts.handlers.otf.readers
+local streamreader=readers.streamreader
+local readstring=streamreader.readstring
+local readbyte=streamreader.readcardinal1 
+local readushort=streamreader.readcardinal2 
+local readuint=streamreader.readcardinal3 
+local readulong=streamreader.readcardinal4 
+local setposition=streamreader.setposition
+local getposition=streamreader.getposition
+local readbytetable=streamreader.readbytetable
+local setmetatableindex=table.setmetatableindex
+local trace_charstrings=false trackers.register("fonts.cff.charstrings",function(v) trace_charstrings=v end)
+local report=logs.reporter("otf reader","cff")
+local parsedictionaries
+local parsecharstring
+local parsecharstrings
+local resetcharstrings
+local parseprivates
+local startparsing
+local stopparsing
+local defaultstrings={ [0]=
+  ".notdef","space","exclam","quotedbl","numbersign","dollar","percent",
+  "ampersand","quoteright","parenleft","parenright","asterisk","plus",
+  "comma","hyphen","period","slash","zero","one","two","three","four",
+  "five","six","seven","eight","nine","colon","semicolon","less",
+  "equal","greater","question","at","A","B","C","D","E","F","G","H",
+  "I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W",
+  "X","Y","Z","bracketleft","backslash","bracketright","asciicircum",
+  "underscore","quoteleft","a","b","c","d","e","f","g","h","i","j",
+  "k","l","m","n","o","p","q","r","s","t","u","v","w","x","y",
+  "z","braceleft","bar","braceright","asciitilde","exclamdown","cent",
+  "sterling","fraction","yen","florin","section","currency",
+  "quotesingle","quotedblleft","guillemotleft","guilsinglleft",
+  "guilsinglright","fi","fl","endash","dagger","daggerdbl",
+  "periodcentered","paragraph","bullet","quotesinglbase","quotedblbase",
+  "quotedblright","guillemotright","ellipsis","perthousand","questiondown",
+  "grave","acute","circumflex","tilde","macron","breve","dotaccent",
+  "dieresis","ring","cedilla","hungarumlaut","ogonek","caron","emdash",
+  "AE","ordfeminine","Lslash","Oslash","OE","ordmasculine","ae",
+  "dotlessi","lslash","oslash","oe","germandbls","onesuperior",
+  "logicalnot","mu","trademark","Eth","onehalf","plusminus","Thorn",
+  "onequarter","divide","brokenbar","degree","thorn","threequarters",
+  "twosuperior","registered","minus","eth","multiply","threesuperior",
+  "copyright","Aacute","Acircumflex","Adieresis","Agrave","Aring",
+  "Atilde","Ccedilla","Eacute","Ecircumflex","Edieresis","Egrave",
+  "Iacute","Icircumflex","Idieresis","Igrave","Ntilde","Oacute",
+  "Ocircumflex","Odieresis","Ograve","Otilde","Scaron","Uacute",
+  "Ucircumflex","Udieresis","Ugrave","Yacute","Ydieresis","Zcaron",
+  "aacute","acircumflex","adieresis","agrave","aring","atilde",
+  "ccedilla","eacute","ecircumflex","edieresis","egrave","iacute",
+  "icircumflex","idieresis","igrave","ntilde","oacute","ocircumflex",
+  "odieresis","ograve","otilde","scaron","uacute","ucircumflex",
+  "udieresis","ugrave","yacute","ydieresis","zcaron","exclamsmall",
+  "Hungarumlautsmall","dollaroldstyle","dollarsuperior","ampersandsmall",
+  "Acutesmall","parenleftsuperior","parenrightsuperior","twodotenleader",
+  "onedotenleader","zerooldstyle","oneoldstyle","twooldstyle",
+  "threeoldstyle","fouroldstyle","fiveoldstyle","sixoldstyle",
+  "sevenoldstyle","eightoldstyle","nineoldstyle","commasuperior",
+  "threequartersemdash","periodsuperior","questionsmall","asuperior",
+  "bsuperior","centsuperior","dsuperior","esuperior","isuperior",
+  "lsuperior","msuperior","nsuperior","osuperior","rsuperior","ssuperior",
+  "tsuperior","ff","ffi","ffl","parenleftinferior","parenrightinferior",
+  "Circumflexsmall","hyphensuperior","Gravesmall","Asmall","Bsmall",
+  "Csmall","Dsmall","Esmall","Fsmall","Gsmall","Hsmall","Ismall",
+  "Jsmall","Ksmall","Lsmall","Msmall","Nsmall","Osmall","Psmall",
+  "Qsmall","Rsmall","Ssmall","Tsmall","Usmall","Vsmall","Wsmall",
+  "Xsmall","Ysmall","Zsmall","colonmonetary","onefitted","rupiah",
+  "Tildesmall","exclamdownsmall","centoldstyle","Lslashsmall",
+  "Scaronsmall","Zcaronsmall","Dieresissmall","Brevesmall","Caronsmall",
+  "Dotaccentsmall","Macronsmall","figuredash","hypheninferior",
+  "Ogoneksmall","Ringsmall","Cedillasmall","questiondownsmall","oneeighth",
+  "threeeighths","fiveeighths","seveneighths","onethird","twothirds",
+  "zerosuperior","foursuperior","fivesuperior","sixsuperior",
+  "sevensuperior","eightsuperior","ninesuperior","zeroinferior",
+  "oneinferior","twoinferior","threeinferior","fourinferior",
+  "fiveinferior","sixinferior","seveninferior","eightinferior",
+  "nineinferior","centinferior","dollarinferior","periodinferior",
+  "commainferior","Agravesmall","Aacutesmall","Acircumflexsmall",
+  "Atildesmall","Adieresissmall","Aringsmall","AEsmall","Ccedillasmall",
+  "Egravesmall","Eacutesmall","Ecircumflexsmall","Edieresissmall",
+  "Igravesmall","Iacutesmall","Icircumflexsmall","Idieresissmall",
+  "Ethsmall","Ntildesmall","Ogravesmall","Oacutesmall","Ocircumflexsmall",
+  "Otildesmall","Odieresissmall","OEsmall","Oslashsmall","Ugravesmall",
+  "Uacutesmall","Ucircumflexsmall","Udieresissmall","Yacutesmall",
+  "Thornsmall","Ydieresissmall","001.000","001.001","001.002","001.003",
+  "Black","Bold","Book","Light","Medium","Regular","Roman","Semibold",
+}
+local cffreaders={
+  readbyte,
+  readushort,
+  readuint,
+  readulong,
+}
+local function readheader(f)
+  local offset=getposition(f)
+  local major=readbyte(f)
+  local header={
+    offset=offset,
+    major=major,
+    minor=readbyte(f),
+    size=readbyte(f),
+  }
+  if major==1 then
+    header.dsize=readbyte(f)  
+  elseif major==2 then
+    header.dsize=readushort(f) 
+  else
+  end
+  setposition(f,offset+header.size)
+  return header
+end
+local function readlengths(f,longcount)
+  local count=longcount and readulong(f) or readushort(f)
+  if count==0 then
+    return {}
+  end
+  local osize=readbyte(f)
+  local read=cffreaders[osize]
+  if not read then
+    report("bad offset size: %i",osize)
+    return {}
+  end
+  local lengths={}
+  local previous=read(f)
+  for i=1,count do
+    local offset=read(f)
+    local length=offset-previous
+    if length<0 then
+      report("bad offset: %i",length)
+      length=0
+    end
+    lengths[i]=length
+    previous=offset
+  end
+  return lengths
+end
+local function readfontnames(f)
+  local names=readlengths(f)
+  for i=1,#names do
+    names[i]=readstring(f,names[i])
+  end
+  return names
+end
+local function readtopdictionaries(f)
+  local dictionaries=readlengths(f)
+  for i=1,#dictionaries do
+    dictionaries[i]=readstring(f,dictionaries[i])
+  end
+  return dictionaries
+end
+local function readstrings(f)
+  local lengths=readlengths(f)
+  local strings=setmetatableindex({},defaultstrings)
+  local index=#defaultstrings
+  for i=1,#lengths do
+    index=index+1
+    strings[index]=readstring(f,lengths[i])
+  end
+  return strings
+end
+do
+  local stack={}
+  local top=0
+  local result={}
+  local strings={}
+  local p_single=P("\00")/function()
+      result.version=strings[stack[top]] or "unset"
+      top=0
+    end+P("\01")/function()
+      result.notice=strings[stack[top]] or "unset"
+      top=0
+    end+P("\02")/function()
+      result.fullname=strings[stack[top]] or "unset"
+      top=0
+    end+P("\03")/function()
+      result.familyname=strings[stack[top]] or "unset"
+      top=0
+    end+P("\04")/function()
+      result.weight=strings[stack[top]] or "unset"
+      top=0
+    end+P("\05")/function()
+      result.fontbbox={ unpack(stack,1,4) }
+      top=0
+    end
++P("\13")/function()
+      result.uniqueid=stack[top]
+      top=0
+    end+P("\14")/function()
+      result.xuid=concat(stack,"",1,top)
+      top=0
+    end+P("\15")/function()
+      result.charset=stack[top]
+      top=0
+    end+P("\16")/function()
+      result.encoding=stack[top]
+      top=0
+    end+P("\17")/function() 
+      result.charstrings=stack[top]
+      top=0
+    end+P("\18")/function()
+      result.private={
+        size=stack[top-1],
+        offset=stack[top],
+      }
+      top=0
+    end+P("\19")/function()
+      result.subroutines=stack[top]
+      top=0 
+    end+P("\20")/function()
+      result.defaultwidthx=stack[top]
+      top=0 
+    end+P("\21")/function()
+      result.nominalwidthx=stack[top]
+      top=0 
+    end
++P("\24")/function() 
+      result.vstore=stack[top]
+      top=0
+    end+P("\25")/function() 
+      result.maxstack=stack[top]
+      top=0
+    end
+  local p_double=P("\12")*(
+    P("\00")/function()
+      result.copyright=stack[top]
+      top=0
+    end+P("\01")/function()
+      result.monospaced=stack[top]==1 and true or false 
+      top=0
+    end+P("\02")/function()
+      result.italicangle=stack[top]
+      top=0
+    end+P("\03")/function()
+      result.underlineposition=stack[top]
+      top=0
+    end+P("\04")/function()
+      result.underlinethickness=stack[top]
+      top=0
+    end+P("\05")/function()
+      result.painttype=stack[top]
+      top=0
+    end+P("\06")/function()
+      result.charstringtype=stack[top]
+      top=0
+    end+P("\07")/function() 
+      result.fontmatrix={ unpack(stack,1,6) }
+      top=0
+    end+P("\08")/function()
+      result.strokewidth=stack[top]
+      top=0
+    end+P("\20")/function()
+      result.syntheticbase=stack[top]
+      top=0
+    end+P("\21")/function()
+      result.postscript=strings[stack[top]] or "unset"
+      top=0
+    end+P("\22")/function()
+      result.basefontname=strings[stack[top]] or "unset"
+      top=0
+    end+P("\21")/function()
+      result.basefontblend=stack[top]
+      top=0
+    end+P("\30")/function()
+      result.cid.registry=strings[stack[top-2]] or "unset"
+      result.cid.ordering=strings[stack[top-1]] or "unset"
+      result.cid.supplement=stack[top]
+      top=0
+    end+P("\31")/function()
+      result.cid.fontversion=stack[top]
+      top=0
+    end+P("\32")/function()
+      result.cid.fontrevision=stack[top]
+      top=0
+    end+P("\33")/function()
+      result.cid.fonttype=stack[top]
+      top=0
+    end+P("\34")/function()
+      result.cid.count=stack[top]
+      top=0
+    end+P("\35")/function()
+      result.cid.uidbase=stack[top]
+      top=0
+    end+P("\36")/function() 
+      result.cid.fdarray=stack[top]
+      top=0
+    end+P("\37")/function() 
+      result.cid.fdselect=stack[top]
+      top=0
+    end+P("\38")/function()
+      result.cid.fontname=strings[stack[top]] or "unset"
+      top=0
+    end
+  )
+  local p_last=P("\x0F")/"0"+P("\x1F")/"1"+P("\x2F")/"2"+P("\x3F")/"3"+P("\x4F")/"4"+P("\x5F")/"5"+P("\x6F")/"6"+P("\x7F")/"7"+P("\x8F")/"8"+P("\x9F")/"9"+P("\xAF")/""+P("\xBF")/""+P("\xCF")/""+P("\xDF")/""+P("\xEF")/""+R("\xF0\xFF")/""
+  local remap={
+    ["\x00"]="00",["\x01"]="01",["\x02"]="02",["\x03"]="03",["\x04"]="04",["\x05"]="05",["\x06"]="06",["\x07"]="07",["\x08"]="08",["\x09"]="09",["\x0A"]="0.",["\x0B"]="0E",["\x0C"]="0E-",["\x0D"]="0",["\x0E"]="0-",["\x0F"]="0",
+    ["\x10"]="10",["\x11"]="11",["\x12"]="12",["\x13"]="13",["\x14"]="14",["\x15"]="15",["\x16"]="16",["\x17"]="17",["\x18"]="18",["\x19"]="19",["\x1A"]="0.",["\x1B"]="0E",["\x1C"]="0E-",["\x1D"]="0",["\x1E"]="0-",["\x1F"]="0",
+    ["\x20"]="20",["\x21"]="21",["\x22"]="22",["\x23"]="23",["\x24"]="24",["\x25"]="25",["\x26"]="26",["\x27"]="27",["\x28"]="28",["\x29"]="29",["\x2A"]="0.",["\x2B"]="0E",["\x2C"]="0E-",["\x2D"]="0",["\x2E"]="0-",["\x2F"]="0",
+    ["\x30"]="30",["\x31"]="31",["\x32"]="32",["\x33"]="33",["\x34"]="34",["\x35"]="35",["\x36"]="36",["\x37"]="37",["\x38"]="38",["\x39"]="39",["\x3A"]="0.",["\x3B"]="0E",["\x3C"]="0E-",["\x3D"]="0",["\x3E"]="0-",["\x3F"]="0",
+    ["\x40"]="40",["\x41"]="41",["\x42"]="42",["\x43"]="43",["\x44"]="44",["\x45"]="45",["\x46"]="46",["\x47"]="47",["\x48"]="48",["\x49"]="49",["\x4A"]="0.",["\x4B"]="0E",["\x4C"]="0E-",["\x4D"]="0",["\x4E"]="0-",["\x4F"]="0",
+    ["\x50"]="50",["\x51"]="51",["\x52"]="52",["\x53"]="53",["\x54"]="54",["\x55"]="55",["\x56"]="56",["\x57"]="57",["\x58"]="58",["\x59"]="59",["\x5A"]="0.",["\x5B"]="0E",["\x5C"]="0E-",["\x5D"]="0",["\x5E"]="0-",["\x5F"]="0",
+    ["\x60"]="60",["\x61"]="61",["\x62"]="62",["\x63"]="63",["\x64"]="64",["\x65"]="65",["\x66"]="66",["\x67"]="67",["\x68"]="68",["\x69"]="69",["\x6A"]="0.",["\x6B"]="0E",["\x6C"]="0E-",["\x6D"]="0",["\x6E"]="0-",["\x6F"]="0",
+    ["\x70"]="70",["\x71"]="71",["\x72"]="72",["\x73"]="73",["\x74"]="74",["\x75"]="75",["\x76"]="76",["\x77"]="77",["\x78"]="78",["\x79"]="79",["\x7A"]="0.",["\x7B"]="0E",["\x7C"]="0E-",["\x7D"]="0",["\x7E"]="0-",["\x7F"]="0",
+    ["\x80"]="80",["\x81"]="81",["\x82"]="82",["\x83"]="83",["\x84"]="84",["\x85"]="85",["\x86"]="86",["\x87"]="87",["\x88"]="88",["\x89"]="89",["\x8A"]="0.",["\x8B"]="0E",["\x8C"]="0E-",["\x8D"]="0",["\x8E"]="0-",["\x8F"]="0",
+    ["\x90"]="90",["\x91"]="91",["\x92"]="92",["\x93"]="93",["\x94"]="94",["\x95"]="95",["\x96"]="96",["\x97"]="97",["\x98"]="98",["\x99"]="99",["\x9A"]="0.",["\x9B"]="0E",["\x9C"]="0E-",["\x9D"]="0",["\x9E"]="0-",["\x9F"]="0",
+    ["\xA0"]=".0",["\xA1"]=".1",["\xA2"]=".2",["\xA3"]=".3",["\xA4"]=".4",["\xA5"]=".5",["\xA6"]=".6",["\xA7"]=".7",["\xA8"]=".8",["\xA9"]=".9",["\xAA"]="..",["\xAB"]=".E",["\xAC"]=".E-",["\xAD"]=".",["\xAE"]=".-",["\xAF"]=".",
+    ["\xB0"]="E0",["\xB1"]="E1",["\xB2"]="E2",["\xB3"]="E3",["\xB4"]="E4",["\xB5"]="E5",["\xB6"]="E6",["\xB7"]="E7",["\xB8"]="E8",["\xB9"]="E9",["\xBA"]="E.",["\xBB"]="EE",["\xBC"]="EE-",["\xBD"]="E",["\xBE"]="E-",["\xBF"]="E",
+    ["\xC0"]="E-0",["\xC1"]="E-1",["\xC2"]="E-2",["\xC3"]="E-3",["\xC4"]="E-4",["\xC5"]="E-5",["\xC6"]="E-6",["\xC7"]="E-7",["\xC8"]="E-8",["\xC9"]="E-9",["\xCA"]="E-.",["\xCB"]="E-E",["\xCC"]="E-E-",["\xCD"]="E-",["\xCE"]="E--",["\xCF"]="E-",
+    ["\xD0"]="-0",["\xD1"]="-1",["\xD2"]="-2",["\xD3"]="-3",["\xD4"]="-4",["\xD5"]="-5",["\xD6"]="-6",["\xD7"]="-7",["\xD8"]="-8",["\xD9"]="-9",["\xDA"]="-.",["\xDB"]="-E",["\xDC"]="-E-",["\xDD"]="-",["\xDE"]="--",["\xDF"]="-",
+  }
+  local p_nibbles=P("\30")*Cs(((1-p_last)/remap)^0+p_last)/function(n)
+    top=top+1
+    stack[top]=tonumber(n) or 0
+  end
+  local p_byte=C(R("\32\246"))/function(b0)
+    top=top+1
+    stack[top]=byte(b0)-139
+  end
+  local p_positive=C(R("\247\250"))*C(1)/function(b0,b1)
+    top=top+1
+    stack[top]=(byte(b0)-247)*256+byte(b1)+108
+  end
+  local p_negative=C(R("\251\254"))*C(1)/function(b0,b1)
+    top=top+1
+    stack[top]=-(byte(b0)-251)*256-byte(b1)-108
+  end
+  local p_short=P("\28")*C(1)*C(1)/function(b1,b2)
+    top=top+1
+    local n=0x100*byte(b1)+byte(b2)
+    if n>=0x8000 then
+      stack[top]=n-0xFFFF-1
+    else
+      stack[top]=n
+    end
+  end
+  local p_long=P("\29")*C(1)*C(1)*C(1)*C(1)/function(b1,b2,b3,b4)
+    top=top+1
+    local n=0x1000000*byte(b1)+0x10000*byte(b2)+0x100*byte(b3)+byte(b4)
+    if n>=0x8000000 then
+      stack[top]=n-0xFFFFFFFF-1
+    else
+      stack[top]=n
+    end
+  end
+  local p_unsupported=P(1)/function(detail)
+    top=0
+  end
+  local p_dictionary=(
+    p_byte+p_positive+p_negative+p_short+p_long+p_nibbles+p_single+p_double+p_unsupported
+  )^1
+  parsedictionaries=function(data,dictionaries,what)
+    stack={}
+    strings=data.strings
+    for i=1,#dictionaries do
+      top=0
+      result=what=="cff" and {
+        monospaced=false,
+        italicangle=0,
+        underlineposition=-100,
+        underlinethickness=50,
+        painttype=0,
+        charstringtype=2,
+        fontmatrix={ 0.001,0,0,0.001,0,0 },
+        fontbbox={ 0,0,0,0 },
+        strokewidth=0,
+        charset=0,
+        encoding=0,
+        cid={
+          fontversion=0,
+          fontrevision=0,
+          fonttype=0,
+          count=8720,
+        }
+      } or {
+        charstringtype=2,
+        charset=0,
+        vstore=0,
+        cid={
+        },
+      }
+      lpegmatch(p_dictionary,dictionaries[i])
+      dictionaries[i]=result
+    end
+    result={}
+    top=0
+    stack={}
+  end
+  parseprivates=function(data,dictionaries)
+    stack={}
+    strings=data.strings
+    for i=1,#dictionaries do
+      local private=dictionaries[i].private
+      if private and private.data then
+        top=0
+        result={
+          forcebold=false,
+          languagegroup=0,
+          expansionfactor=0.06,
+          initialrandomseed=0,
+          subroutines=0,
+          defaultwidthx=0,
+          nominalwidthx=0,
+          cid={
+          },
+        }
+        lpegmatch(p_dictionary,private.data)
+        private.data=result
+      end
+    end
+    result={}
+    top=0
+    stack={}
+  end
+  local x=0
+  local y=0
+  local width=false
+  local r=0
+  local stems=0
+  local globalbias=0
+  local localbias=0
+  local nominalwidth=0
+  local defaultwidth=0
+  local charset=false
+  local globals=false
+  local locals=false
+  local depth=1
+  local xmin=0
+  local xmax=0
+  local ymin=0
+  local ymax=0
+  local checked=false
+  local keepcurve=false
+  local version=2
+  local regions=false
+  local nofregions=0
+  local region=false
+  local factors=false
+  local axis=false
+  local vsindex=0
+  local function showstate(where)
+    report("%w%-10s : [%s] n=%i",depth*2,where,concat(stack," ",1,top),top)
+  end
+  local function showvalue(where,value,showstack)
+    if showstack then
+      report("%w%-10s : %s : [%s] n=%i",depth*2,where,tostring(value),concat(stack," ",1,top),top)
+    else
+      report("%w%-10s : %s",depth*2,where,tostring(value))
+    end
+  end
+  local function xymoveto()
+    if keepcurve then
+      r=r+1
+      result[r]={ x,y,"m" }
+    end
+    if checked then
+      if x>xmax then xmax=x elseif x<xmin then xmin=x end
+      if y>ymax then ymax=y elseif y<ymin then ymin=y end
+    else
+      xmin=x
+      ymin=y
+      xmax=x
+      ymax=y
+      checked=true
+    end
+  end
+  local function xmoveto() 
+    if keepcurve then
+      r=r+1
+      result[r]={ x,y,"m" }
+    end
+    if not checked then
+      xmin=x
+      ymin=y
+      xmax=x
+      ymax=y
+      checked=true
+    elseif x>xmax then
+      xmax=x
+    elseif x<xmin then
+      xmin=x
+    end
+  end
+  local function ymoveto() 
+    if keepcurve then
+      r=r+1
+      result[r]={ x,y,"m" }
+    end
+    if not checked then
+      xmin=x
+      ymin=y
+      xmax=x
+      ymax=y
+      checked=true
+    elseif y>ymax then
+      ymax=y
+    elseif y<ymin then
+      ymin=y
+    end
+  end
+  local function moveto()
+    if trace_charstrings then
+      showstate("moveto")
+    end
+    top=0 
+    xymoveto()
+  end
+  local function xylineto() 
+    if keepcurve then
+      r=r+1
+      result[r]={ x,y,"l" }
+    end
+    if checked then
+      if x>xmax then xmax=x elseif x<xmin then xmin=x end
+      if y>ymax then ymax=y elseif y<ymin then ymin=y end
+    else
+      xmin=x
+      ymin=y
+      xmax=x
+      ymax=y
+      checked=true
+    end
+  end
+  local function xlineto() 
+    if keepcurve then
+      r=r+1
+      result[r]={ x,y,"l" }
+    end
+    if not checked then
+      xmin=x
+      ymin=y
+      xmax=x
+      ymax=y
+      checked=true
+    elseif x>xmax then
+      xmax=x
+    elseif x<xmin then
+      xmin=x
+    end
+  end
+  local function ylineto() 
+    if keepcurve then
+      r=r+1
+      result[r]={ x,y,"l" }
+    end
+    if not checked then
+      xmin=x
+      ymin=y
+      xmax=x
+      ymax=y
+      checked=true
+    elseif y>ymax then
+      ymax=y
+    elseif y<ymin then
+      ymin=y
+    end
+  end
+  local function xycurveto(x1,y1,x2,y2,x3,y3) 
+    if trace_charstrings then
+      showstate("curveto")
+    end
+    if keepcurve then
+      r=r+1
+      result[r]={ x1,y1,x2,y2,x3,y3,"c" }
+    end
+    if checked then
+      if x1>xmax then xmax=x1 elseif x1<xmin then xmin=x1 end
+      if y1>ymax then ymax=y1 elseif y1<ymin then ymin=y1 end
+    else
+      xmin=x1
+      ymin=y1
+      xmax=x1
+      ymax=y1
+      checked=true
+    end
+    if x2>xmax then xmax=x2 elseif x2<xmin then xmin=x2 end
+    if y2>ymax then ymax=y2 elseif y2<ymin then ymin=y2 end
+    if x3>xmax then xmax=x3 elseif x3<xmin then xmin=x3 end
+    if y3>ymax then ymax=y3 elseif y3<ymin then ymin=y3 end
+  end
+  local function rmoveto()
+    if not width then
+      if top>2 then
+        width=stack[1]
+        if trace_charstrings then
+          showvalue("backtrack width",width)
+        end
+      else
+        width=true
+      end
+    end
+    if trace_charstrings then
+      showstate("rmoveto")
+    end
+    x=x+stack[top-1] 
+    y=y+stack[top]  
+    top=0
+    xymoveto()
+  end
+  local function hmoveto()
+    if not width then
+      if top>1 then
+        width=stack[1]
+        if trace_charstrings then
+          showvalue("backtrack width",width)
+        end
+      else
+        width=true
+      end
+    end
+    if trace_charstrings then
+      showstate("hmoveto")
+    end
+    x=x+stack[top] 
+    top=0
+    xmoveto()
+  end
+  local function vmoveto()
+    if not width then
+      if top>1 then
+        width=stack[1]
+        if trace_charstrings then
+          showvalue("backtrack width",width)
+        end
+      else
+        width=true
+      end
+    end
+    if trace_charstrings then
+      showstate("vmoveto")
+    end
+    y=y+stack[top] 
+    top=0
+    ymoveto()
+  end
+  local function rlineto()
+    if trace_charstrings then
+      showstate("rlineto")
+    end
+    for i=1,top,2 do
+      x=x+stack[i]  
+      y=y+stack[i+1] 
+      xylineto()
+    end
+    top=0
+  end
+  local function hlineto() 
+    if trace_charstrings then
+      showstate("hlineto")
+    end
+    if top==1 then
+      x=x+stack[1]
+      xlineto()
+    else
+      local swap=true
+      for i=1,top do
+        if swap then
+          x=x+stack[i]
+          xlineto()
+          swap=false
+        else
+          y=y+stack[i]
+          ylineto()
+          swap=true
+        end
+      end
+    end
+    top=0
+  end
+  local function vlineto() 
+    if trace_charstrings then
+      showstate("vlineto")
+    end
+    if top==1 then
+      y=y+stack[1]
+      ylineto()
+    else
+      local swap=false
+      for i=1,top do
+        if swap then
+          x=x+stack[i]
+          xlineto()
+          swap=false
+        else
+          y=y+stack[i]
+          ylineto()
+          swap=true
+        end
+      end
+    end
+    top=0
+  end
+  local function rrcurveto()
+    if trace_charstrings then
+      showstate("rrcurveto")
+    end
+    for i=1,top,6 do
+      local ax=x+stack[i]  
+      local ay=y+stack[i+1] 
+      local bx=ax+stack[i+2] 
+      local by=ay+stack[i+3] 
+      x=bx+stack[i+4]    
+      y=by+stack[i+5]    
+      xycurveto(ax,ay,bx,by,x,y)
+    end
+    top=0
+  end
+  local function hhcurveto()
+    if trace_charstrings then
+      showstate("hhcurveto")
+    end
+    local s=1
+    if top%2~=0 then
+      y=y+stack[1]      
+      s=2
+    end
+    for i=s,top,4 do
+      local ax=x+stack[i]  
+      local ay=y
+      local bx=ax+stack[i+1] 
+      local by=ay+stack[i+2] 
+      x=bx+stack[i+3]    
+      y=by
+      xycurveto(ax,ay,bx,by,x,y)
+    end
+    top=0
+  end
+  local function vvcurveto()
+    if trace_charstrings then
+      showstate("vvcurveto")
+    end
+    local s=1
+    local d=0
+    if top%2~=0 then
+      d=stack[1]        
+      s=2
+    end
+    for i=s,top,4 do
+      local ax=x+d
+      local ay=y+stack[i]  
+      local bx=ax+stack[i+1] 
+      local by=ay+stack[i+2] 
+      x=bx
+      y=by+stack[i+3]    
+      xycurveto(ax,ay,bx,by,x,y)
+      d=0
+    end
+    top=0
+  end
+  local function xxcurveto(swap)
+    local last=top%4~=0 and stack[top]
+    if last then
+      top=top-1
+    end
+    for i=1,top,4 do
+      local ax,ay,bx,by
+      if swap then
+        ax=x+stack[i]
+        ay=y
+        bx=ax+stack[i+1]
+        by=ay+stack[i+2]
+        y=by+stack[i+3]
+        if last and i+3==top then
+          x=bx+last
+        else
+          x=bx
+        end
+        swap=false
+      else
+        ax=x
+        ay=y+stack[i]
+        bx=ax+stack[i+1]
+        by=ay+stack[i+2]
+        x=bx+stack[i+3]
+        if last and i+3==top then
+          y=by+last
+        else
+          y=by
+        end
+        swap=true
+      end
+      xycurveto(ax,ay,bx,by,x,y)
+    end
+    top=0
+  end
+  local function hvcurveto()
+    if trace_charstrings then
+      showstate("hvcurveto")
+    end
+    xxcurveto(true)
+  end
+  local function vhcurveto()
+    if trace_charstrings then
+      showstate("vhcurveto")
+    end
+    xxcurveto(false)
+  end
+  local function rcurveline()
+    if trace_charstrings then
+      showstate("rcurveline")
+    end
+    for i=1,top-2,6 do
+      local ax=x+stack[i]  
+      local ay=y+stack[i+1] 
+      local bx=ax+stack[i+2] 
+      local by=ay+stack[i+3] 
+      x=bx+stack[i+4] 
+      y=by+stack[i+5] 
+      xycurveto(ax,ay,bx,by,x,y)
+    end
+    x=x+stack[top-1] 
+    y=y+stack[top]  
+    xylineto()
+    top=0
+  end
+  local function rlinecurve()
+    if trace_charstrings then
+      showstate("rlinecurve")
+    end
+    if top>6 then
+      for i=1,top-6,2 do
+        x=x+stack[i]
+        y=y+stack[i+1]
+        xylineto()
+      end
+    end
+    local ax=x+stack[top-5]
+    local ay=y+stack[top-4]
+    local bx=ax+stack[top-3]
+    local by=ay+stack[top-2]
+    x=bx+stack[top-1]
+    y=by+stack[top]
+    xycurveto(ax,ay,bx,by,x,y)
+    top=0
+  end
+  local function flex() 
+    if trace_charstrings then
+      showstate("flex")
+    end
+    local ax=x+stack[1] 
+    local ay=y+stack[2] 
+    local bx=ax+stack[3] 
+    local by=ay+stack[4] 
+    local cx=bx+stack[5] 
+    local cy=by+stack[6] 
+    xycurveto(ax,ay,bx,by,cx,cy)
+    local dx=cx+stack[7] 
+    local dy=cy+stack[8] 
+    local ex=dx+stack[9] 
+    local ey=dy+stack[10] 
+    x=ex+stack[11]    
+    y=ey+stack[12]    
+    xycurveto(dx,dy,ex,ey,x,y)
+    top=0
+  end
+  local function hflex()
+    if trace_charstrings then
+      showstate("hflex")
+    end
+    local ax=x+stack[1] 
+    local ay=y
+    local bx=ax+stack[2] 
+    local by=ay+stack[3] 
+    local cx=bx+stack[4] 
+    local cy=by
+    xycurveto(ax,ay,bx,by,cx,cy)
+    local dx=cx+stack[5] 
+    local dy=by
+    local ex=dx+stack[6] 
+    local ey=y
+    x=ex+stack[7]    
+    xycurveto(dx,dy,ex,ey,x,y)
+    top=0
+  end
+  local function hflex1()
+    if trace_charstrings then
+      showstate("hflex1")
+    end
+    local ax=x+stack[1] 
+    local ay=y+stack[2] 
+    local bx=ax+stack[3] 
+    local by=ay+stack[4] 
+    local cx=bx+stack[5] 
+    local cy=by
+    xycurveto(ax,ay,bx,by,cx,cy)
+    local dx=cx+stack[6] 
+    local dy=by
+    local ex=dx+stack[7] 
+    local ey=dy+stack[8] 
+    x=ex+stack[9]    
+    xycurveto(dx,dy,ex,ey,x,y)
+    top=0
+  end
+  local function flex1()
+    if trace_charstrings then
+      showstate("flex1")
+    end
+    local ax=x+stack[1] 
+    local ay=y+stack[2] 
+    local bx=ax+stack[3] 
+    local by=ay+stack[4] 
+    local cx=bx+stack[5] 
+    local cy=by+stack[6] 
+    xycurveto(ax,ay,bx,by,cx,cy)
+    local dx=cx+stack[7] 
+    local dy=cy+stack[8] 
+    local ex=dx+stack[9] 
+    local ey=dy+stack[10] 
+    if abs(ex-x)>abs(ey-y) then 
+      x=ex+stack[11]
+    else
+      y=ey+stack[11]
+    end
+    xycurveto(dx,dy,ex,ey,x,y)
+    top=0
+  end
+  local function getstem()
+    if top==0 then
+    elseif top%2~=0 then
+      if width then
+        remove(stack,1)
+      else
+        width=remove(stack,1)
+        if trace_charstrings then
+          showvalue("width",width)
+        end
+      end
+      top=top-1
+    end
+    if trace_charstrings then
+      showstate("stem")
+    end
+    stems=stems+top/2
+    top=0
+  end
+  local function getmask()
+    if top==0 then
+    elseif top%2~=0 then
+      if width then
+        remove(stack,1)
+      else
+        width=remove(stack,1)
+        if trace_charstrings then
+          showvalue("width",width)
+        end
+      end
+      top=top-1
+    end
+    if trace_charstrings then
+      showstate(operator==19 and "hintmark" or "cntrmask")
+    end
+    stems=stems+top/2
+    top=0
+    if stems==0 then
+    elseif stems<=8 then
+      return 1
+    else
+      return floor((stems+7)/8)
+    end
+  end
+  local function unsupported(t)
+    if trace_charstrings then
+      showstate("unsupported "..t)
+    end
+    top=0
+  end
+  local function unsupportedsub(t)
+    if trace_charstrings then
+      showstate("unsupported sub "..t)
+    end
+    top=0
+  end
+  local function getstem3()
+    if trace_charstrings then
+      showstate("stem3")
+    end
+    top=0
+  end
+  local function divide()
+    if version==1 then
+      local d=stack[top]
+      top=top-1
+      stack[top]=stack[top]/d
+    end
+  end
+  local function closepath()
+    if version==1 then
+      if trace_charstrings then
+        showstate("closepath")
+      end
+    end
+    top=0
+  end
+  local function hsbw()
+    if version==1 then
+      if trace_charstrings then
+        showstate("dotsection")
+      end
+      width=stack[top]
+    end
+    top=0
+  end
+  local function seac()
+    if version==1 then
+      if trace_charstrings then
+        showstate("seac")
+      end
+    end
+    top=0
+  end
+  local function sbw()
+    if version==1 then
+      if trace_charstrings then
+        showstate("sbw")
+      end
+      width=stack[top-1]
+    end
+    top=0
+  end
+  local function callothersubr()
+    if version==1 then
+      if trace_charstrings then
+        showstate("callothersubr (unsupported)")
+      end
+    end
+    top=0
+  end
+  local function pop()
+    if version==1 then
+      if trace_charstrings then
+        showstate("pop (unsupported)")
+      end
+      top=top+1
+      stack[top]=0 
+    else
+      top=0
+    end
+  end
+  local function setcurrentpoint()
+    if version==1 then
+      if trace_charstrings then
+        showstate("pop (unsupported)")
+      end
+      x=x+stack[top-1]
+      y=y+stack[top]
+    end
+    top=0
+  end
+  local reginit=false
+  local function updateregions(n) 
+    if regions then
+      local current=regions[n] or regions[1]
+      nofregions=#current
+      if axis and n~=reginit then
+        factors={}
+        for i=1,nofregions do
+          local region=current[i]
+          local s=1
+          for j=1,#axis do
+            local f=axis[j]
+            local r=region[j]
+            local start=r.start
+            local peak=r.peak
+            local stop=r.stop
+            if start>peak or peak>stop then
+            elseif start<0 and stop>0 and peak~=0 then
+            elseif peak==0 then
+            elseif f<start or f>stop then
+              s=0
+              break
+            elseif f<peak then
+              s=s*(f-start)/(peak-start)
+            elseif f>peak then
+              s=s*(stop-f)/(stop-peak)
+            else
+            end
+          end
+          factors[i]=s
+        end
+      end
+    end
+    reginit=n
+  end
+  local function setvsindex()
+    local vsindex=stack[top]
+    if trace_charstrings then
+      showstate(formatters["vsindex %i"](vsindex))
+    end
+    updateregions(vsindex)
+    top=top-1
+  end
+  local function blend()
+    local n=stack[top]
+    top=top-1
+    if axis then
+      if trace_charstrings then
+        local t=top-nofregions*n
+        local m=t-n
+        for i=1,n do
+          local k=m+i
+          local d=m+n+(i-1)*nofregions
+          local old=stack[k]
+          local new=old
+          for r=1,nofregions do
+            new=new+stack[d+r]*factors[r]
+          end
+          stack[k]=new
+          showstate(formatters["blend %i of %i: %s -> %s"](i,n,old,new))
+        end
+        top=t
+      elseif n==1 then
+        top=top-nofregions
+        local v=stack[top]
+        for r=1,nofregions do
+          v=v+stack[top+r]*factors[r]
+        end
+        stack[top]=v
+      else
+        top=top-nofregions*n
+        local d=top
+        local k=top-n
+        for i=1,n do
+          k=k+1
+          local v=stack[k]
+          for r=1,nofregions do
+            v=v+stack[d+r]*factors[r]
+          end
+          stack[k]=v
+          d=d+nofregions
+        end
+      end
+    else
+    end
+  end
+  local actions={ [0]=unsupported,
+    getstem,
+    unsupported,
+    getstem,
+    vmoveto,
+    rlineto,
+    hlineto,
+    vlineto,
+    rrcurveto,
+    unsupported,
+    unsupported,
+    unsupported,
+    unsupported,
+    hsbw,
+    unsupported,
+    setvsindex,
+    blend,
+    unsupported,
+    getstem,
+    getmask,
+    getmask,
+    rmoveto,
+    hmoveto,
+    getstem,
+    rcurveline,
+    rlinecurve,
+    vvcurveto,
+    hhcurveto,
+    unsupported,
+    unsupported,
+    vhcurveto,
+    hvcurveto,
+  }
+  local subactions={
+    [000]=dotsection,
+    [001]=getstem3,
+    [002]=getstem3,
+    [006]=seac,
+    [007]=sbw,
+    [012]=divide,
+    [016]=callothersubr,
+    [017]=pop,
+    [033]=setcurrentpoint,
+    [034]=hflex,
+    [035]=flex,
+    [036]=hflex1,
+    [037]=flex1,
+  }
+  local c_endchar=char(14)
+  local passon do
+    local rshift=bit32.rshift
+    local band=bit32.band
+    local round=math.round
+    local encode=table.setmetatableindex(function(t,i)
+      for i=-2048,-1130 do
+        t[i]=char(28,band(rshift(i,8),0xFF),band(i,0xFF))
+      end
+      for i=-1131,-108 do
+        local v=0xFB00-i-108
+        t[i]=char(band(rshift(v,8),0xFF),band(v,0xFF))
+      end
+      for i=-107,107 do
+        t[i]=char(i+139)
+      end
+      for i=108,1131 do
+        local v=0xF700+i-108
+        t[i]=char(band(rshift(v,8),0xFF),band(v,0xFF))
+      end
+      for i=1132,2048 do
+        t[i]=char(28,band(rshift(i,8),0xFF),band(i,0xFF))
+      end
+      return t[i]
+    end)
+    local function setvsindex()
+      local vsindex=stack[top]
+      updateregions(vsindex)
+      top=top-1
+    end
+    local function blend()
+      local n=stack[top]
+      top=top-1
+      if not axis then
+      elseif n==1 then
+        top=top-nofregions
+        local v=stack[top]
+        for r=1,nofregions do
+          v=v+stack[top+r]*factors[r]
+        end
+        stack[top]=round(v)
+      else
+        top=top-nofregions*n
+        local d=top
+        local k=top-n
+        for i=1,n do
+          k=k+1
+          local v=stack[k]
+          for r=1,nofregions do
+            v=v+stack[d+r]*factors[r]
+          end
+          stack[k]=round(v)
+          d=d+nofregions
+        end
+      end
+    end
+    passon=function(operation)
+      if operation==15 then
+        setvsindex()
+      elseif operation==16 then
+        blend()
+      else
+        for i=1,top do
+          r=r+1
+          result[r]=encode[stack[i]]
+        end
+        r=r+1
+        result[r]=char(operation) 
+        top=0
+      end
+    end
+  end
+  local process
+  local function call(scope,list,bias) 
+    depth=depth+1
+    if top==0 then
+      showstate(formatters["unknown %s call"](scope))
+      top=0
+    else
+      local index=stack[top]+bias
+      top=top-1
+      if trace_charstrings then
+        showvalue(scope,index,true)
+      end
+      local tab=list[index]
+      if tab then
+        process(tab)
+      else
+        showstate(formatters["unknown %s call %i"](scope,index))
+        top=0
+      end
+    end
+    depth=depth-1
+  end
+  local justpass=false
+  process=function(tab)
+    local i=1
+    local n=#tab
+    while i<=n do
+      local t=tab[i]
+      if t>=32 then
+        top=top+1
+        if t<=246 then
+          stack[top]=t-139
+          i=i+1
+        elseif t<=250 then
+          stack[top]=t*256-63124+tab[i+1]
+          i=i+2
+        elseif t<=254 then
+          stack[top]=-t*256+64148-tab[i+1]
+          i=i+2
+        else
+          local n=0x100*tab[i+1]+tab[i+2]
+          if n>=0x8000 then
+            stack[top]=n-0x10000+(0x100*tab[i+3]+tab[i+4])/0xFFFF
+          else
+            stack[top]=n+(0x100*tab[i+3]+tab[i+4])/0xFFFF
+          end
+          i=i+5
+        end
+      elseif t==28 then
+        top=top+1
+        local n=0x100*tab[i+1]+tab[i+2]
+        if n>=0x8000 then
+          stack[top]=n-0x10000
+        else
+          stack[top]=n
+        end
+        i=i+3
+      elseif t==11 then 
+        if trace_charstrings then
+          showstate("return")
+        end
+        return
+      elseif t==10 then
+        call("local",locals,localbias) 
+        i=i+1
+      elseif t==14 then 
+        if width then
+        elseif top>0 then
+          width=stack[1]
+          if trace_charstrings then
+            showvalue("width",width)
+          end
+        else
+          width=true
+        end
+        if trace_charstrings then
+          showstate("endchar")
+        end
+        return
+      elseif t==29 then
+        call("global",globals,globalbias) 
+        i=i+1
+      elseif t==12 then
+        i=i+1
+        local t=tab[i]
+        local a=subactions[t]
+        if a then
+          a(t)
+        else
+          if trace_charstrings then
+            showvalue("<subaction>",t)
+          end
+          top=0
+        end
+        i=i+1
+      elseif justpass then
+        passon(t)
+        i=i+1
+      else
+        local a=actions[t]
+        if a then
+          local s=a(t)
+          if s then
+            i=i+s+1
+          else
+            i=i+1
+          end
+        else
+          if trace_charstrings then
+            showvalue("<action>",t)
+          end
+          top=0
+          i=i+1
+        end
+      end
+    end
+  end
+  local function setbias(globals,locals)
+    if version==1 then
+      return
+        false,
+        false
+    else
+      local g,l=#globals,#locals
+      return
+        ((g<1240 and 107) or (g<33900 and 1131) or 32768)+1,
+        ((l<1240 and 107) or (l<33900 and 1131) or 32768)+1
+    end
+  end
+  local function processshape(tab,index)
+    tab=bytetable(tab)
+    x=0
+    y=0
+    width=false
+    r=0
+    top=0
+    stems=0
+    result={} 
+    xmin=0
+    xmax=0
+    ymin=0
+    ymax=0
+    checked=false
+    if trace_charstrings then
+      report("glyph: %i",index)
+      report("data : % t",tab)
+    end
+    if regions then
+      updateregions(vsindex)
+    end
+    process(tab)
+    local boundingbox={
+      round(xmin),
+      round(ymin),
+      round(xmax),
+      round(ymax),
+    }
+    if width==true or width==false then
+      width=defaultwidth
+    else
+      width=nominalwidth+width
+    end
+    local glyph=glyphs[index] 
+    if justpass then
+      r=r+1
+      result[r]=c_endchar
+      local stream=concat(result)
+      if glyph then
+        glyph.stream=stream
+      else
+        glyphs[index]={ stream=stream }
+      end
+    elseif glyph then
+      glyph.segments=keepcurve~=false and result or nil
+      glyph.boundingbox=boundingbox
+      if not glyph.width then
+        glyph.width=width
+      end
+      if charset and not glyph.name then
+        glyph.name=charset[index]
+      end
+    elseif keepcurve then
+      glyphs[index]={
+        segments=result,
+        boundingbox=boundingbox,
+        width=width,
+        name=charset and charset[index] or nil,
+      }
+    else
+      glyphs[index]={
+        boundingbox=boundingbox,
+        width=width,
+        name=charset and charset[index] or nil,
+      }
+    end
+    if trace_charstrings then
+      report("width      : %s",tostring(width))
+      report("boundingbox: % t",boundingbox)
+    end
+  end
+  startparsing=function(fontdata,data,streams)
+    reginit=false
+    axis=false
+    regions=data.regions
+    justpass=streams==true
+    if regions then
+      regions={ regions } 
+      axis=data.factors or false
+    end
+  end
+  stopparsing=function(fontdata,data)
+    stack={}
+    glyphs=false
+    result={}
+    top=0
+    locals=false
+    globals=false
+    strings=false
+  end
+  local function setwidths(private)
+    if not private then
+      return 0,0
+    end
+    local privatedata=private.data
+    if not privatedata then
+      return 0,0
+    end
+    return privatedata.nominalwidthx or 0,privatedata.defaultwidthx or 0
+  end
+  parsecharstrings=function(fontdata,data,glphs,doshapes,tversion,streams)
+    local dictionary=data.dictionaries[1]
+    local charstrings=dictionary.charstrings
+    keepcurve=doshapes
+    version=tversion
+    strings=data.strings
+    globals=data.routines or {}
+    locals=dictionary.subroutines or {}
+    charset=dictionary.charset
+    vsindex=dictionary.vsindex or 0
+    glyphs=glphs or {}
+    globalbias,localbias=setbias(globals,locals)
+    nominalwidth,defaultwidth=setwidths(dictionary.private)
+    startparsing(fontdata,data,streams)
+    for index=1,#charstrings do
+      processshape(charstrings[index],index-1)
+      charstrings[index]=nil 
+    end
+    stopparsing(fontdata,data)
+    return glyphs
+  end
+  parsecharstring=function(fontdata,data,dictionary,tab,glphs,index,doshapes,tversion)
+    keepcurve=doshapes
+    version=tversion
+    strings=data.strings
+    globals=data.routines or {}
+    locals=dictionary.subroutines or {}
+    charset=false
+    vsindex=dictionary.vsindex or 0
+    glyphs=glphs or {}
+    globalbias,localbias=setbias(globals,locals)
+    nominalwidth,defaultwidth=setwidths(dictionary.private)
+    processshape(tab,index-1)
+  end
+end
+local function readglobals(f,data)
+  local routines=readlengths(f)
+  for i=1,#routines do
+    routines[i]=readbytetable(f,routines[i])
+  end
+  data.routines=routines
+end
+local function readencodings(f,data)
+  data.encodings={}
+end
+local function readcharsets(f,data,dictionary)
+  local header=data.header
+  local strings=data.strings
+  local nofglyphs=data.nofglyphs
+  local charsetoffset=dictionary.charset
+  if charsetoffset and charsetoffset~=0 then
+    setposition(f,header.offset+charsetoffset)
+    local format=readbyte(f)
+    local charset={ [0]=".notdef" }
+    dictionary.charset=charset
+    if format==0 then
+      for i=1,nofglyphs do
+        charset[i]=strings[readushort(f)]
+      end
+    elseif format==1 or format==2 then
+      local readcount=format==1 and readbyte or readushort
+      local i=1
+      while i<=nofglyphs do
+        local sid=readushort(f)
+        local n=readcount(f)
+        for s=sid,sid+n do
+          charset[i]=strings[s]
+          i=i+1
+          if i>nofglyphs then
+            break
+          end
+        end
+      end
+    else
+      report("cff parser: unsupported charset format %a",format)
+    end
+  else
+    dictionary.nocharset=true
+    dictionary.charset=nil
+  end
+end
+local function readprivates(f,data)
+  local header=data.header
+  local dictionaries=data.dictionaries
+  local private=dictionaries[1].private
+  if private then
+    setposition(f,header.offset+private.offset)
+    private.data=readstring(f,private.size)
+  end
+end
+local function readlocals(f,data,dictionary)
+  local header=data.header
+  local private=dictionary.private
+  if private then
+    local subroutineoffset=private.data.subroutines
+    if subroutineoffset~=0 then
+      setposition(f,header.offset+private.offset+subroutineoffset)
+      local subroutines=readlengths(f)
+      for i=1,#subroutines do
+        subroutines[i]=readbytetable(f,subroutines[i])
+      end
+      dictionary.subroutines=subroutines
+      private.data.subroutines=nil
+    else
+      dictionary.subroutines={}
+    end
+  else
+    dictionary.subroutines={}
+  end
+end
+local function readcharstrings(f,data,what)
+  local header=data.header
+  local dictionaries=data.dictionaries
+  local dictionary=dictionaries[1]
+  local stringtype=dictionary.charstringtype
+  local offset=dictionary.charstrings
+  if type(offset)~="number" then
+  elseif stringtype==2 then
+    setposition(f,header.offset+offset)
+    local charstrings=readlengths(f,what=="cff2")
+    local nofglyphs=#charstrings
+    for i=1,nofglyphs do
+      charstrings[i]=readstring(f,charstrings[i])
+    end
+    data.nofglyphs=nofglyphs
+    dictionary.charstrings=charstrings
+  else
+    report("unsupported charstr type %i",stringtype)
+    data.nofglyphs=0
+    dictionary.charstrings={}
+  end
+end
+local function readcidprivates(f,data)
+  local header=data.header
+  local dictionaries=data.dictionaries[1].cid.dictionaries
+  for i=1,#dictionaries do
+    local dictionary=dictionaries[i]
+    local private=dictionary.private
+    if private then
+      setposition(f,header.offset+private.offset)
+      private.data=readstring(f,private.size)
+    end
+  end
+  parseprivates(data,dictionaries)
+end
+readers.parsecharstrings=parsecharstrings 
+local function readnoselect(f,fontdata,data,glyphs,doshapes,version,streams)
+  local dictionaries=data.dictionaries
+  local dictionary=dictionaries[1]
+  readglobals(f,data)
+  readcharstrings(f,data,version)
+  if version=="cff2" then
+    dictionary.charset=nil
+  else
+    readencodings(f,data)
+    readcharsets(f,data,dictionary)
+  end
+  readprivates(f,data)
+  parseprivates(data,data.dictionaries)
+  readlocals(f,data,dictionary)
+  startparsing(fontdata,data,streams)
+  parsecharstrings(fontdata,data,glyphs,doshapes,version,streams)
+  stopparsing(fontdata,data)
+end
+local function readfdselect(f,fontdata,data,glyphs,doshapes,version,streams)
+  local header=data.header
+  local dictionaries=data.dictionaries
+  local dictionary=dictionaries[1]
+  local cid=dictionary.cid
+  local cidselect=cid and cid.fdselect
+  readglobals(f,data)
+  readcharstrings(f,data,version)
+  if version~="cff2" then
+    readencodings(f,data)
+  end
+  local charstrings=dictionary.charstrings
+  local fdindex={}
+  local nofglyphs=data.nofglyphs
+  local maxindex=-1
+  setposition(f,header.offset+cidselect)
+  local format=readbyte(f)
+  if format==1 then
+    for i=0,nofglyphs do 
+      local index=readbyte(i)
+      fdindex[i]=index
+      if index>maxindex then
+        maxindex=index
+      end
+    end
+  elseif format==3 then
+    local nofranges=readushort(f)
+    local first=readushort(f)
+    local index=readbyte(f)
+    while true do
+      local last=readushort(f)
+      if index>maxindex then
+        maxindex=index
+      end
+      for i=first,last do
+        fdindex[i]=index
+      end
+      if last>=nofglyphs then
+        break
+      else
+        first=last+1
+        index=readbyte(f)
+      end
+    end
+  else
+  end
+  if maxindex>=0 then
+    local cidarray=cid.fdarray
+    setposition(f,header.offset+cidarray)
+    local dictionaries=readlengths(f)
+    for i=1,#dictionaries do
+      dictionaries[i]=readstring(f,dictionaries[i])
+    end
+    parsedictionaries(data,dictionaries)
+    cid.dictionaries=dictionaries
+    readcidprivates(f,data)
+    for i=1,#dictionaries do
+      readlocals(f,data,dictionaries[i])
+    end
+    startparsing(fontdata,data,streams)
+    for i=1,#charstrings do
+      parsecharstring(fontdata,data,dictionaries[fdindex[i]+1],charstrings[i],glyphs,i,doshapes,version)
+      charstrings[i]=nil
+    end
+    stopparsing(fontdata,data)
+  end
+end
+local gotodatatable=readers.helpers.gotodatatable
+local function cleanup(data,dictionaries)
+end
+function readers.cff(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"cff",specification.details)
+  if tableoffset then
+    local header=readheader(f)
+    if header.major~=1 then
+      report("only version %s is supported for table %a",1,"cff")
+      return
+    end
+    local glyphs=fontdata.glyphs
+    local names=readfontnames(f)
+    local dictionaries=readtopdictionaries(f)
+    local strings=readstrings(f)
+    local data={
+      header=header,
+      names=names,
+      dictionaries=dictionaries,
+      strings=strings,
+      nofglyphs=fontdata.nofglyphs,
+    }
+    parsedictionaries(data,dictionaries,"cff")
+    local dic=dictionaries[1]
+    local cid=dic.cid
+    fontdata.cffinfo={
+      familynamename=dic.familyname,
+      fullname=dic.fullname,
+      boundingbox=dic.boundingbox,
+      weight=dic.weight,
+      italicangle=dic.italicangle,
+      underlineposition=dic.underlineposition,
+      underlinethickness=dic.underlinethickness,
+      monospaced=dic.monospaced,
+    }
+    fontdata.cidinfo=cid and {
+      registry=cid.registry,
+      ordering=cid.ordering,
+      supplement=cid.supplement,
+    }
+    if specification.glyphs then
+      local all=specification.shapes or false
+      if cid and cid.fdselect then
+        readfdselect(f,fontdata,data,glyphs,all,"cff")
+      else
+        readnoselect(f,fontdata,data,glyphs,all,"cff")
+      end
+    end
+    cleanup(data,dictionaries)
+  end
+end
+function readers.cff2(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"cff2",specification.glyphs)
+  if tableoffset then
+    local header=readheader(f)
+    if header.major~=2 then
+      report("only version %s is supported for table %a",2,"cff2")
+      return
+    end
+    local glyphs=fontdata.glyphs
+    local dictionaries={ readstring(f,header.dsize) }
+    local data={
+      header=header,
+      dictionaries=dictionaries,
+      nofglyphs=fontdata.nofglyphs,
+    }
+    parsedictionaries(data,dictionaries,"cff2")
+    local offset=dictionaries[1].vstore
+    if offset>0 then
+      local storeoffset=dictionaries[1].vstore+data.header.offset+2 
+      local regions,deltas=readers.helpers.readvariationdata(f,storeoffset,factors)
+      data.regions=regions
+      data.deltas=deltas
+    else
+      data.regions={}
+      data.deltas={}
+    end
+    data.factors=specification.factors
+    local cid=data.dictionaries[1].cid
+    local all=specification.shapes or false
+    if cid and cid.fdselect then
+      readfdselect(f,fontdata,data,glyphs,all,"cff2",specification.streams)
+    else
+      readnoselect(f,fontdata,data,glyphs,all,"cff2",specification.streams)
+    end
+    cleanup(data,dictionaries)
+  end
+end
+function readers.cffcheck(filename)
+  local f=io.open(filename,"rb")
+  if f then
+    local fontdata={
+      glyphs={},
+    }
+    local header=readheader(f)
+    if header.major~=1 then
+      report("only version %s is supported for table %a",1,"cff")
+      return
+    end
+    local names=readfontnames(f)
+    local dictionaries=readtopdictionaries(f)
+    local strings=readstrings(f)
+    local glyphs={}
+    local data={
+      header=header,
+      names=names,
+      dictionaries=dictionaries,
+      strings=strings,
+      glyphs=glyphs,
+      nofglyphs=4,
+    }
+    parsedictionaries(data,dictionaries,"cff")
+    local cid=data.dictionaries[1].cid
+    if cid and cid.fdselect then
+      readfdselect(f,fontdata,data,glyphs,false)
+    else
+      readnoselect(f,fontdata,data,glyphs,false)
+    end
+    return data
+  end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-ttf']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local next,type,unpack=next,type,unpack
+local bittest,band,rshift=bit32.btest,bit32.band,bit32.rshift
+local sqrt,round=math.sqrt,math.round
+local char=string.char
+local concat=table.concat
+local report=logs.reporter("otf reader","ttf")
+local trace_deltas=false
+local readers=fonts.handlers.otf.readers
+local streamreader=readers.streamreader
+local setposition=streamreader.setposition
+local getposition=streamreader.getposition
+local skipbytes=streamreader.skip
+local readbyte=streamreader.readcardinal1 
+local readushort=streamreader.readcardinal2 
+local readulong=streamreader.readcardinal4 
+local readchar=streamreader.readinteger1  
+local readshort=streamreader.readinteger2  
+local read2dot14=streamreader.read2dot14   
+local readinteger=streamreader.readinteger1
+local helpers=readers.helpers
+local gotodatatable=helpers.gotodatatable
+local function mergecomposites(glyphs,shapes)
+  local function merge(index,shape,components)
+    local contours={}
+    local points={}
+    local nofcontours=0
+    local nofpoints=0
+    local offset=0
+    local deltas=shape.deltas
+    for i=1,#components do
+      local component=components[i]
+      local subindex=component.index
+      local subshape=shapes[subindex]
+      local subcontours=subshape.contours
+      local subpoints=subshape.points
+      if not subcontours then
+        local subcomponents=subshape.components
+        if subcomponents then
+          subcontours,subpoints=merge(subindex,subshape,subcomponents)
+        end
+      end
+      if subpoints then
+        local matrix=component.matrix
+        local xscale=matrix[1]
+        local xrotate=matrix[2]
+        local yrotate=matrix[3]
+        local yscale=matrix[4]
+        local xoffset=matrix[5]
+        local yoffset=matrix[6]
+        for i=1,#subpoints do
+          local p=subpoints[i]
+          local x=p[1]
+          local y=p[2]
+          nofpoints=nofpoints+1
+          points[nofpoints]={
+            xscale*x+xrotate*y+xoffset,
+            yscale*y+yrotate*x+yoffset,
+            p[3]
+          }
+        end
+        for i=1,#subcontours do
+          nofcontours=nofcontours+1
+          contours[nofcontours]=offset+subcontours[i]
+        end
+        offset=offset+#subpoints
+      else
+        report("missing contours composite %s, component %s of %s, glyph %s",index,i,#components,subindex)
+      end
+    end
+    shape.points=points 
+    shape.contours=contours
+    shape.components=nil
+    return contours,points
+  end
+  for index=1,#glyphs do
+    local shape=shapes[index]
+    if shape then
+      local components=shape.components
+      if components then
+        merge(index,shape,components)
+      end
+    end
+  end
+end
+local function readnothing(f,nofcontours)
+  return {
+    type="nothing",
+  }
+end
+local function curveto(m_x,m_y,l_x,l_y,r_x,r_y) 
+  return
+    l_x+2/3*(m_x-l_x),l_y+2/3*(m_y-l_y),
+    r_x+2/3*(m_x-r_x),r_y+2/3*(m_y-r_y),
+    r_x,r_y,"c"
+end
+local function applyaxis(glyph,shape,deltas,dowidth)
+  local points=shape.points
+  if points then
+    local nofpoints=#points
+    local h=nofpoints+2 
+    local l=nofpoints+1
+    local dw=0
+    local dl=0
+    for i=1,#deltas do
+      local deltaset=deltas[i]
+      local xvalues=deltaset.xvalues
+      local yvalues=deltaset.yvalues
+      local dpoints=deltaset.points
+      local factor=deltaset.factor
+      if dpoints then
+        local nofdpoints=#dpoints
+        for i=1,nofdpoints do
+          local d=dpoints[i]
+          local p=points[d]
+          if p then
+            if xvalues then
+              local x=xvalues[i]
+              if x and x~=0 then
+                p[1]=p[1]+factor*x
+              end
+            end
+            if yvalues then
+              local y=yvalues[i]
+              if y and y~=0 then
+                p[2]=p[2]+factor*y
+              end
+            end
+          elseif dowidth then
+            if d==h then
+              local x=xvalues[i]
+              if x then
+                dw=dw+factor*x
+              end
+            elseif d==l then
+              local x=xvalues[i]
+              if x then
+                dl=dl+factor*x
+              end
+            end
+          end
+        end
+      else
+        for i=1,nofpoints do
+          local p=points[i]
+          if xvalues then
+            local x=xvalues[i]
+            if x and x~=0 then
+              p[1]=p[1]+factor*x
+            end
+          end
+          if yvalues then
+            local y=yvalues[i]
+            if y and y~=0 then
+              p[2]=p[2]+factor*y
+            end
+          end
+        end
+        if dowidth then
+          local x=xvalues[h]
+          if x then
+            dw=dw+factor*x
+          end
+          local x=xvalues[l]
+          if x then
+            dl=dl+factor*x
+          end
+        end
+      end
+    end
+    if dowidth then
+      local width=glyph.width or 0
+      glyph.width=width+dw-dl
+    end
+  else
+    report("no points for glyph %a",glyph.name)
+  end
+end
+local quadratic=false
+local function contours2outlines_normal(glyphs,shapes) 
+  for index=1,#glyphs do
+    local shape=shapes[index]
+    if shape then
+      local glyph=glyphs[index]
+      local contours=shape.contours
+      local points=shape.points
+      if contours then
+        local nofcontours=#contours
+        local segments={}
+        local nofsegments=0
+        glyph.segments=segments
+        if nofcontours>0 then
+          local px,py=0,0 
+          local first=1
+          for i=1,nofcontours do
+            local last=contours[i]
+            if last>=first then
+              local first_pt=points[first]
+              local first_on=first_pt[3]
+              if first==last then
+                first_pt[3]="m" 
+                nofsegments=nofsegments+1
+                segments[nofsegments]=first_pt
+              else 
+                local first_on=first_pt[3]
+                local last_pt=points[last]
+                local last_on=last_pt[3]
+                local start=1
+                local control_pt=false
+                if first_on then
+                  start=2
+                else
+                  if last_on then
+                    first_pt=last_pt
+                  else
+                    first_pt={ (first_pt[1]+last_pt[1])/2,(first_pt[2]+last_pt[2])/2,false }
+                  end
+                  control_pt=first_pt
+                end
+                local x,y=first_pt[1],first_pt[2]
+                if not done then
+                  xmin,ymin,xmax,ymax=x,y,x,y
+                  done=true
+                end
+                nofsegments=nofsegments+1
+                segments[nofsegments]={ x,y,"m" } 
+                if not quadratic then
+                  px,py=x,y
+                end
+                local previous_pt=first_pt
+                for i=first,last do
+                  local current_pt=points[i]
+                  local current_on=current_pt[3]
+                  local previous_on=previous_pt[3]
+                  if previous_on then
+                    if current_on then
+                      local x,y=current_pt[1],current_pt[2]
+                      nofsegments=nofsegments+1
+                      segments[nofsegments]={ x,y,"l" } 
+                      if not quadratic then
+                        px,py=x,y
+                      end
+                    else
+                      control_pt=current_pt
+                    end
+                  elseif current_on then
+                    local x1,y1=control_pt[1],control_pt[2]
+                    local x2,y2=current_pt[1],current_pt[2]
+                    nofsegments=nofsegments+1
+                    if quadratic then
+                      segments[nofsegments]={ x1,y1,x2,y2,"q" } 
+                    else
+                      x1,y1,x2,y2,px,py=curveto(x1,y1,px,py,x2,y2)
+                      segments[nofsegments]={ x1,y1,x2,y2,px,py,"c" } 
+                    end
+                    control_pt=false
+                  else
+                    local x2,y2=(previous_pt[1]+current_pt[1])/2,(previous_pt[2]+current_pt[2])/2
+                    local x1,y1=control_pt[1],control_pt[2]
+                    nofsegments=nofsegments+1
+                    if quadratic then
+                      segments[nofsegments]={ x1,y1,x2,y2,"q" } 
+                    else
+                      x1,y1,x2,y2,px,py=curveto(x1,y1,px,py,x2,y2)
+                      segments[nofsegments]={ x1,y1,x2,y2,px,py,"c" } 
+                    end
+                    control_pt=current_pt
+                  end
+                  previous_pt=current_pt
+                end
+                if first_pt==last_pt then
+                else
+                  nofsegments=nofsegments+1
+                  local x2,y2=first_pt[1],first_pt[2]
+                  if not control_pt then
+                    segments[nofsegments]={ x2,y2,"l" } 
+                  elseif quadratic then
+                    local x1,y1=control_pt[1],control_pt[2]
+                    segments[nofsegments]={ x1,y1,x2,y2,"q" } 
+                  else
+                    local x1,y1=control_pt[1],control_pt[2]
+                    x1,y1,x2,y2,px,py=curveto(x1,y1,px,py,x2,y2)
+                    segments[nofsegments]={ x1,y1,x2,y2,px,py,"c" }
+                  end
+                end
+              end
+            end
+            first=last+1
+          end
+        end
+      end
+    end
+  end
+end
+local function contours2outlines_shaped(glyphs,shapes,keepcurve)
+  for index=1,#glyphs do
+    local shape=shapes[index]
+    if shape then
+      local glyph=glyphs[index]
+      local contours=shape.contours
+      local points=shape.points
+      if contours then
+        local nofcontours=#contours
+        local segments=keepcurve and {} or nil
+        local nofsegments=0
+        if keepcurve then
+          glyph.segments=segments
+        end
+        if nofcontours>0 then
+          local xmin,ymin,xmax,ymax,done=0,0,0,0,false
+          local px,py=0,0 
+          local first=1
+          for i=1,nofcontours do
+            local last=contours[i]
+            if last>=first then
+              local first_pt=points[first]
+              local first_on=first_pt[3]
+              if first==last then
+                if keepcurve then
+                  first_pt[3]="m" 
+                  nofsegments=nofsegments+1
+                  segments[nofsegments]=first_pt
+                end
+              else 
+                local first_on=first_pt[3]
+                local last_pt=points[last]
+                local last_on=last_pt[3]
+                local start=1
+                local control_pt=false
+                if first_on then
+                  start=2
+                else
+                  if last_on then
+                    first_pt=last_pt
+                  else
+                    first_pt={ (first_pt[1]+last_pt[1])/2,(first_pt[2]+last_pt[2])/2,false }
+                  end
+                  control_pt=first_pt
+                end
+                local x,y=first_pt[1],first_pt[2]
+                if not done then
+                  xmin,ymin,xmax,ymax=x,y,x,y
+                  done=true
+                else
+                  if x<xmin then xmin=x elseif x>xmax then xmax=x end
+                  if y<ymin then ymin=y elseif y>ymax then ymax=y end
+                end
+                if keepcurve then
+                  nofsegments=nofsegments+1
+                  segments[nofsegments]={ x,y,"m" } 
+                end
+                if not quadratic then
+                  px,py=x,y
+                end
+                local previous_pt=first_pt
+                for i=first,last do
+                  local current_pt=points[i]
+                  local current_on=current_pt[3]
+                  local previous_on=previous_pt[3]
+                  if previous_on then
+                    if current_on then
+                      local x,y=current_pt[1],current_pt[2]
+                      if x<xmin then xmin=x elseif x>xmax then xmax=x end
+                      if y<ymin then ymin=y elseif y>ymax then ymax=y end
+                      if keepcurve then
+                        nofsegments=nofsegments+1
+                        segments[nofsegments]={ x,y,"l" } 
+                      end
+                      if not quadratic then
+                        px,py=x,y
+                      end
+                    else
+                      control_pt=current_pt
+                    end
+                  elseif current_on then
+                    local x1,y1=control_pt[1],control_pt[2]
+                    local x2,y2=current_pt[1],current_pt[2]
+                    if quadratic then
+                      if x1<xmin then xmin=x1 elseif x1>xmax then xmax=x1 end
+                      if y1<ymin then ymin=y1 elseif y1>ymax then ymax=y1 end
+                      if keepcurve then
+                        nofsegments=nofsegments+1
+                        segments[nofsegments]={ x1,y1,x2,y2,"q" } 
+                      end
+                    else
+                      x1,y1,x2,y2,px,py=curveto(x1,y1,px,py,x2,y2)
+                      if x1<xmin then xmin=x1 elseif x1>xmax then xmax=x1 end
+                      if y1<ymin then ymin=y1 elseif y1>ymax then ymax=y1 end
+                      if x2<xmin then xmin=x2 elseif x2>xmax then xmax=x2 end
+                      if y2<ymin then ymin=y2 elseif y2>ymax then ymax=y2 end
+                      if px<xmin then xmin=px elseif px>xmax then xmax=px end
+                      if py<ymin then ymin=py elseif py>ymax then ymax=py end
+                      if keepcurve then
+                        nofsegments=nofsegments+1
+                        segments[nofsegments]={ x1,y1,x2,y2,px,py,"c" } 
+                      end
+                    end
+                    control_pt=false
+                  else
+                    local x2,y2=(previous_pt[1]+current_pt[1])/2,(previous_pt[2]+current_pt[2])/2
+                    local x1,y1=control_pt[1],control_pt[2]
+                    if quadratic then
+                      if x1<xmin then xmin=x1 elseif x1>xmax then xmax=x1 end
+                      if y1<ymin then ymin=y1 elseif y1>ymax then ymax=y1 end
+                      if keepcurve then
+                        nofsegments=nofsegments+1
+                        segments[nofsegments]={ x1,y1,x2,y2,"q" } 
+                      end
+                    else
+                      x1,y1,x2,y2,px,py=curveto(x1,y1,px,py,x2,y2)
+                      if x1<xmin then xmin=x1 elseif x1>xmax then xmax=x1 end
+                      if y1<ymin then ymin=y1 elseif y1>ymax then ymax=y1 end
+                      if x2<xmin then xmin=x2 elseif x2>xmax then xmax=x2 end
+                      if y2<ymin then ymin=y2 elseif y2>ymax then ymax=y2 end
+                      if px<xmin then xmin=px elseif px>xmax then xmax=px end
+                      if py<ymin then ymin=py elseif py>ymax then ymax=py end
+                      if keepcurve then
+                        nofsegments=nofsegments+1
+                        segments[nofsegments]={ x1,y1,x2,y2,px,py,"c" } 
+                      end
+                    end
+                    control_pt=current_pt
+                  end
+                  previous_pt=current_pt
+                end
+                if first_pt==last_pt then
+                elseif not control_pt then
+                  if keepcurve then
+                    nofsegments=nofsegments+1
+                    segments[nofsegments]={ first_pt[1],first_pt[2],"l" } 
+                  end
+                else
+                  local x1,y1=control_pt[1],control_pt[2]
+                  local x2,y2=first_pt[1],first_pt[2]
+                  if x1<xmin then xmin=x1 elseif x1>xmax then xmax=x1 end
+                  if y1<ymin then ymin=y1 elseif y1>ymax then ymax=y1 end
+                  if quadratic then
+                    if keepcurve then
+                      nofsegments=nofsegments+1
+                      segments[nofsegments]={ x1,y1,x2,y2,"q" } 
+                    end
+                  else
+                    x1,y1,x2,y2,px,py=curveto(x1,y1,px,py,x2,y2)
+                    if x2<xmin then xmin=x2 elseif x2>xmax then xmax=x2 end
+                    if y2<ymin then ymin=y2 elseif y2>ymax then ymax=y2 end
+                    if px<xmin then xmin=px elseif px>xmax then xmax=px end
+                    if py<ymin then ymin=py elseif py>ymax then ymax=py end
+                    if keepcurve then
+                      nofsegments=nofsegments+1
+                      segments[nofsegments]={ x1,y1,x2,y2,px,py,"c" } 
+                    end
+                  end
+                end
+              end
+            end
+            first=last+1
+          end
+          glyph.boundingbox={ round(xmin),round(ymin),round(xmax),round(ymax) }
+        end
+      end
+    end
+  end
+end
+local c_zero=char(0)
+local s_zero=char(0,0)
+local function toushort(n)
+  return char(band(rshift(n,8),0xFF),band(n,0xFF))
+end
+local function toshort(n)
+  if n<0 then
+    n=n+0x10000
+  end
+  return char(band(rshift(n,8),0xFF),band(n,0xFF))
+end
+local function repackpoints(glyphs,shapes)
+  local noboundingbox={ 0,0,0,0 }
+  local result={} 
+  for index=1,#glyphs do
+    local shape=shapes[index]
+    if shape then
+      local r=0
+      local glyph=glyphs[index]
+      if false then
+      else
+        local contours=shape.contours
+        local nofcontours=contours and #contours or 0
+        local boundingbox=glyph.boundingbox or noboundingbox
+        r=r+1 result[r]=toshort(nofcontours)
+        r=r+1 result[r]=toshort(boundingbox[1]) 
+        r=r+1 result[r]=toshort(boundingbox[2]) 
+        r=r+1 result[r]=toshort(boundingbox[3]) 
+        r=r+1 result[r]=toshort(boundingbox[4]) 
+        if nofcontours>0 then
+          for i=1,nofcontours do
+            r=r+1 result[r]=toshort(contours[i]-1)
+          end
+          r=r+1 result[r]=s_zero 
+          local points=shape.points
+          local currentx=0
+          local currenty=0
+          local xpoints={}
+          local ypoints={}
+          local x=0
+          local y=0
+          local lastflag=nil
+          local nofflags=0
+          for i=1,#points do
+            local pt=points[i]
+            local px=pt[1]
+            local py=pt[2]
+            local fl=pt[3] and 0x01 or 0x00
+            if px==currentx then
+              fl=fl+0x10
+            else
+              local dx=round(px-currentx)
+              if dx<-255 or dx>255 then
+                x=x+1 xpoints[x]=toshort(dx)
+              elseif dx<0 then
+                fl=fl+0x02
+                x=x+1 xpoints[x]=char(-dx)
+              elseif dx>0 then
+                fl=fl+0x12
+                x=x+1 xpoints[x]=char(dx)
+              else
+                fl=fl+0x02
+                x=x+1 xpoints[x]=c_zero
+              end
+            end
+            if py==currenty then
+              fl=fl+0x20
+            else
+              local dy=round(py-currenty)
+              if dy<-255 or dy>255 then
+                y=y+1 ypoints[y]=toshort(dy)
+              elseif dy<0 then
+                fl=fl+0x04
+                y=y+1 ypoints[y]=char(-dy)
+              elseif dy>0 then
+                fl=fl+0x24
+                y=y+1 ypoints[y]=char(dy)
+              else
+                fl=fl+0x04
+                y=y+1 ypoints[y]=c_zero
+              end
+            end
+            currentx=px
+            currenty=py
+            if lastflag==fl then
+              nofflags=nofflags+1
+            else 
+              if nofflags==1 then
+                r=r+1 result[r]=char(lastflag)
+              elseif nofflags==2 then
+                r=r+1 result[r]=char(lastflag,lastflag)
+              elseif nofflags>2 then
+                lastflag=lastflag+0x08
+                r=r+1 result[r]=char(lastflag,nofflags-1)
+              end
+              nofflags=1
+              lastflag=fl
+            end
+          end
+          if nofflags==1 then
+            r=r+1 result[r]=char(lastflag)
+          elseif nofflags==2 then
+            r=r+1 result[r]=char(lastflag,lastflag)
+          elseif nofflags>2 then
+            lastflag=lastflag+0x08
+            r=r+1 result[r]=char(lastflag,nofflags-1)
+          end
+          r=r+1 result[r]=concat(xpoints)
+          r=r+1 result[r]=concat(ypoints)
+        end
+      end
+      glyph.stream=concat(result,"",1,r)
+    else
+    end
+  end
+end
+local function readglyph(f,nofcontours) 
+  local points={}
+  local contours={}
+  local instructions={}
+  local flags={}
+  for i=1,nofcontours do
+    contours[i]=readshort(f)+1
+  end
+  local nofpoints=contours[nofcontours]
+  local nofinstructions=readushort(f)
+  skipbytes(f,nofinstructions)
+  local i=1
+  while i<=nofpoints do
+    local flag=readbyte(f)
+    flags[i]=flag
+    if bittest(flag,0x08) then
+      for j=1,readbyte(f) do
+        i=i+1
+        flags[i]=flag
+      end
+    end
+    i=i+1
+  end
+  local x=0
+  for i=1,nofpoints do
+    local flag=flags[i]
+    local short=bittest(flag,0x02)
+    local same=bittest(flag,0x10)
+    if short then
+      if same then
+        x=x+readbyte(f)
+      else
+        x=x-readbyte(f)
+      end
+    elseif same then
+    else
+      x=x+readshort(f)
+    end
+    points[i]={ x,0,bittest(flag,0x01) }
+  end
+  local y=0
+  for i=1,nofpoints do
+    local flag=flags[i]
+    local short=bittest(flag,0x04)
+    local same=bittest(flag,0x20)
+    if short then
+      if same then
+        y=y+readbyte(f)
+      else
+        y=y-readbyte(f)
+      end
+    elseif same then
+    else
+      y=y+readshort(f)
+    end
+    points[i][2]=y
+  end
+  return {
+    type="glyph",
+    points=points,
+    contours=contours,
+    nofpoints=nofpoints,
+  }
+end
+local function readcomposite(f)
+  local components={}
+  local nofcomponents=0
+  local instructions=false
+  while true do
+    local flags=readushort(f)
+    local index=readushort(f)
+    local f_xyarg=bittest(flags,0x0002)
+    local f_offset=bittest(flags,0x0800)
+    local xscale=1
+    local xrotate=0
+    local yrotate=0
+    local yscale=1
+    local xoffset=0
+    local yoffset=0
+    local base=false
+    local reference=false
+    if f_xyarg then
+      if bittest(flags,0x0001) then 
+        xoffset=readshort(f)
+        yoffset=readshort(f)
+      else
+        xoffset=readchar(f) 
+        yoffset=readchar(f) 
+      end
+    else
+      if bittest(flags,0x0001) then 
+        base=readshort(f)
+        reference=readshort(f)
+      else
+        base=readchar(f) 
+        reference=readchar(f) 
+      end
+    end
+    if bittest(flags,0x0008) then 
+      xscale=read2dot14(f)
+      yscale=xscale
+      if f_xyarg and f_offset then
+        xoffset=xoffset*xscale
+        yoffset=yoffset*yscale
+      end
+    elseif bittest(flags,0x0040) then 
+      xscale=read2dot14(f)
+      yscale=read2dot14(f)
+      if f_xyarg and f_offset then
+        xoffset=xoffset*xscale
+        yoffset=yoffset*yscale
+      end
+    elseif bittest(flags,0x0080) then 
+      xscale=read2dot14(f)
+      xrotate=read2dot14(f)
+      yrotate=read2dot14(f)
+      yscale=read2dot14(f)
+      if f_xyarg and f_offset then
+        xoffset=xoffset*sqrt(xscale^2+xrotate^2)
+        yoffset=yoffset*sqrt(yrotate^2+yscale^2)
+      end
+    end
+    nofcomponents=nofcomponents+1
+    components[nofcomponents]={
+      index=index,
+      usemine=bittest(flags,0x0200),
+      round=bittest(flags,0x0006),
+      base=base,
+      reference=reference,
+      matrix={ xscale,xrotate,yrotate,yscale,xoffset,yoffset },
+    }
+    if bittest(flags,0x0100) then
+      instructions=true
+    end
+    if not bittest(flags,0x0020) then 
+      break
+    end
+  end
+  return {
+    type="composite",
+    components=components,
+  }
+end
+function readers.loca(f,fontdata,specification)
+  if specification.glyphs then
+    local datatable=fontdata.tables.loca
+    if datatable then
+      local offset=fontdata.tables.glyf.offset
+      local format=fontdata.fontheader.indextolocformat
+      local locations={}
+      setposition(f,datatable.offset)
+      if format==1 then
+        local nofglyphs=datatable.length/4-2
+        for i=0,nofglyphs do
+          locations[i]=offset+readulong(f)
+        end
+        fontdata.nofglyphs=nofglyphs
+      else
+        local nofglyphs=datatable.length/2-2
+        for i=0,nofglyphs do
+          locations[i]=offset+readushort(f)*2
+        end
+        fontdata.nofglyphs=nofglyphs
+      end
+      fontdata.locations=locations
+    end
+  end
+end
+function readers.glyf(f,fontdata,specification) 
+  local tableoffset=gotodatatable(f,fontdata,"glyf",specification.glyphs)
+  if tableoffset then
+    local locations=fontdata.locations
+    if locations then
+      local glyphs=fontdata.glyphs
+      local nofglyphs=fontdata.nofglyphs
+      local filesize=fontdata.filesize
+      local nothing={ 0,0,0,0 }
+      local shapes={}
+      local loadshapes=specification.shapes or specification.instance
+      for index=0,nofglyphs do
+        local location=locations[index]
+        if location>=filesize then
+          report("discarding %s glyphs due to glyph location bug",nofglyphs-index+1)
+          fontdata.nofglyphs=index-1
+          fontdata.badfont=true
+          break
+        elseif location>0 then
+          setposition(f,location)
+          local nofcontours=readshort(f)
+          glyphs[index].boundingbox={
+            readshort(f),
+            readshort(f),
+            readshort(f),
+            readshort(f),
+          }
+          if not loadshapes then
+          elseif nofcontours==0 then
+            shapes[index]=readnothing(f,nofcontours)
+          elseif nofcontours>0 then
+            shapes[index]=readglyph(f,nofcontours)
+          else
+            shapes[index]=readcomposite(f,nofcontours)
+          end
+        else
+          if loadshapes then
+            shapes[index]={}
+          end
+          glyphs[index].boundingbox=nothing
+        end
+      end
+      if loadshapes then
+        if readers.gvar then
+          readers.gvar(f,fontdata,specification,glyphs,shapes)
+        end
+        mergecomposites(glyphs,shapes)
+        if specification.instance then
+          if specification.streams then
+            repackpoints(glyphs,shapes)
+          else
+            contours2outlines_shaped(glyphs,shapes,specification.shapes)
+          end
+        elseif specification.shapes then
+          contours2outlines_normal(glyphs,shapes)
+        end
+      end
+    end
+  end
+end
+local function readtuplerecord(f,nofaxis)
+  local record={}
+  for i=1,nofaxis do
+    record[i]=read2dot14(f)
+  end
+  return record
+end
+local function readpoints(f)
+  local count=readbyte(f)
+  if count==0 then
+    return nil,0 
+  else
+    if count<128 then
+    elseif bittest(count,0x80) then
+      count=band(count,0x7F)*256+readbyte(f)
+    else
+    end
+    local points={}
+    local p=0
+    local n=1 
+    while p<count do
+      local control=readbyte(f)
+      local runreader=bittest(control,0x80) and readushort or readbyte
+      local runlength=band(control,0x7F)
+      for i=1,runlength+1 do
+        n=n+runreader(f)
+        p=p+1
+        points[p]=n
+      end
+    end
+    return points,p
+  end
+end
+local function readdeltas(f,nofpoints)
+  local deltas={}
+  local p=0
+  local z=0
+  while nofpoints>0 do
+    local control=readbyte(f)
+if not control then
+  break
+end
+    local allzero=bittest(control,0x80)
+    local runlength=band(control,0x3F)+1
+    if allzero then
+      z=z+runlength
+    else
+      local runreader=bittest(control,0x40) and readshort or readinteger
+      if z>0 then
+        for i=1,z do
+          p=p+1
+          deltas[p]=0
+        end
+        z=0
+      end
+      for i=1,runlength do
+        p=p+1
+        deltas[p]=runreader(f)
+      end
+    end
+    nofpoints=nofpoints-runlength
+  end
+  if p>0 then
+    return deltas
+  else
+  end
+end
+local function readdeltas(f,nofpoints)
+  local deltas={}
+  local p=0
+  while nofpoints>0 do
+    local control=readbyte(f)
+    if control then
+      local allzero=bittest(control,0x80)
+      local runlength=band(control,0x3F)+1
+      if allzero then
+        for i=1,runlength do
+          p=p+1
+          deltas[p]=0
+        end
+      else
+        local runreader=bittest(control,0x40) and readshort or readinteger
+        for i=1,runlength do
+          p=p+1
+          deltas[p]=runreader(f)
+        end
+      end
+      nofpoints=nofpoints-runlength
+    else
+      break
+    end
+  end
+  if p>0 then
+    return deltas
+  else
+  end
+end
+function readers.gvar(f,fontdata,specification,glyphdata,shapedata)
+  local instance=specification.instance
+  if not instance then
+    return
+  end
+  local factors=specification.factors
+  if not factors then
+    return
+  end
+  local tableoffset=gotodatatable(f,fontdata,"gvar",specification.variable or specification.shapes)
+  if tableoffset then
+    local version=readulong(f) 
+    local nofaxis=readushort(f)
+    local noftuples=readushort(f)
+    local tupleoffset=tableoffset+readulong(f)
+    local nofglyphs=readushort(f)
+    local flags=readushort(f)
+    local dataoffset=tableoffset+readulong(f)
+    local data={}
+    local tuples={}
+    local glyphdata=fontdata.glyphs
+    local dowidth=not fontdata.variabledata.hvarwidths
+    if bittest(flags,0x0001) then
+      for i=1,nofglyphs+1 do
+        data[i]=dataoffset+readulong(f)
+      end
+    else
+      for i=1,nofglyphs+1 do
+        data[i]=dataoffset+2*readushort(f)
+      end
+    end
+    if noftuples>0 then
+      setposition(f,tupleoffset)
+      for i=1,noftuples do
+        tuples[i]=readtuplerecord(f,nofaxis)
+      end
+    end
+    local nextoffset=false
+    local startoffset=data[1]
+    for i=1,nofglyphs do 
+      nextoffset=data[i+1]
+      local glyph=glyphdata[i-1]
+      local name=trace_deltas and glyph.name
+      if startoffset==nextoffset then
+        if name then
+          report("no deltas for glyph %a",name)
+        end
+      else
+        local shape=shapedata[i-1] 
+        if not shape then
+          if name then
+            report("no shape for glyph %a",name)
+          end
+        else
+          lastoffset=startoffset
+          setposition(f,startoffset)
+          local flags=readushort(f)
+          local count=band(flags,0x0FFF)
+          local offset=startoffset+readushort(f) 
+          local deltas={}
+          local allpoints=(shape.nofpoints or 0) 
+          local shared=false
+          local nofshared=0
+          if bittest(flags,0x8000) then
+            local current=getposition(f)
+            setposition(f,offset)
+            shared,nofshared=readpoints(f)
+            offset=getposition(f)
+            setposition(f,current)
+          end
+          for j=1,count do
+            local size=readushort(f) 
+            local flags=readushort(f)
+            local index=band(flags,0x0FFF)
+            local haspeak=bittest(flags,0x8000)
+            local intermediate=bittest(flags,0x4000)
+            local private=bittest(flags,0x2000)
+            local peak=nil
+            local start=nil
+            local stop=nil
+            local xvalues=nil
+            local yvalues=nil
+            local points=shared  
+            local nofpoints=nofshared
+            if haspeak then
+              peak=readtuplerecord(f,nofaxis)
+            else
+              if index+1>#tuples then
+                report("error, bad tuple index",index)
+              end
+              peak=tuples[index+1] 
+            end
+            if intermediate then
+              start=readtuplerecord(f,nofaxis)
+              stop=readtuplerecord(f,nofaxis)
+            end
+            if size>0 then
+              local current=getposition(f)
+              setposition(f,offset)
+              if private then
+                points,nofpoints=readpoints(f)
+              end 
+              if nofpoints==0 then
+                nofpoints=allpoints+4
+              end
+              if nofpoints>0 then
+                xvalues=readdeltas(f,nofpoints)
+                yvalues=readdeltas(f,nofpoints)
+              end
+              offset=offset+size
+              setposition(f,current)
+            end
+            if not xvalues and not yvalues then
+              points=nil
+            end
+            local s=1
+            for i=1,nofaxis do
+              local f=factors[i]
+              local peak=peak and peak [i] or 0
+              local start=start and start[i] or (peak<0 and peak or 0)
+              local stop=stop and stop [i] or (peak>0 and peak or 0)
+              if start>peak or peak>stop then
+              elseif start<0 and stop>0 and peak~=0 then
+              elseif peak==0 then
+              elseif f<start or f>stop then
+                s=0
+                break
+              elseif f<peak then
+                s=s*(f-start)/(peak-start)
+              elseif f>peak then
+                s=s*(stop-f)/(stop-peak)
+              else
+              end
+            end
+            if s==0 then
+              if name then
+                report("no deltas applied for glyph %a",name)
+              end
+            else
+              deltas[#deltas+1]={
+                factor=s,
+                points=points,
+                xvalues=xvalues,
+                yvalues=yvalues,
+              }
+            end
+          end
+          if shape.type=="glyph" then
+            applyaxis(glyph,shape,deltas,dowidth)
+          else
+            shape.deltas=deltas
+          end
+        end
+      end
+      startoffset=nextoffset
+    end
+  end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-dsp']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local next,type=next,type
+local bittest=bit32.btest
+local band=bit32.band
+local extract=bit32.extract
+local bor=bit32.bor
+local lshift=bit32.lshift
+local rshift=bit32.rshift
+local gsub=string.gsub
+local lower=string.lower
+local sub=string.sub
+local strip=string.strip
+local tohash=table.tohash
+local concat=table.concat
+local copy=table.copy
+local reversed=table.reversed
+local sort=table.sort
+local insert=table.insert
+local round=math.round
+local lpegmatch=lpeg.match
+local setmetatableindex=table.setmetatableindex
+local formatters=string.formatters
+local sortedkeys=table.sortedkeys
+local sortedhash=table.sortedhash
+local report=logs.reporter("otf reader")
+local readers=fonts.handlers.otf.readers
+local streamreader=readers.streamreader
+local setposition=streamreader.setposition
+local getposition=streamreader.getposition
+local readushort=streamreader.readcardinal2 
+local readulong=streamreader.readcardinal4 
+local readinteger=streamreader.readinteger1
+local readshort=streamreader.readinteger2  
+local readstring=streamreader.readstring
+local readtag=streamreader.readtag
+local readbytes=streamreader.readbytes
+local readfixed=streamreader.readfixed4
+local read2dot14=streamreader.read2dot14
+local skipshort=streamreader.skipshort
+local skipbytes=streamreader.skip
+local readfword=readshort
+local readbytetable=streamreader.readbytetable
+local readbyte=streamreader.readbyte
+local gsubhandlers={}
+local gposhandlers={}
+readers.gsubhandlers=gsubhandlers
+readers.gposhandlers=gposhandlers
+local helpers=readers.helpers
+local gotodatatable=helpers.gotodatatable
+local setvariabledata=helpers.setvariabledata
+local lookupidoffset=-1  
+local classes={
+  "base",
+  "ligature",
+  "mark",
+  "component",
+}
+local gsubtypes={
+  "single",
+  "multiple",
+  "alternate",
+  "ligature",
+  "context",
+  "chainedcontext",
+  "extension",
+  "reversechainedcontextsingle",
+}
+local gpostypes={
+  "single",
+  "pair",
+  "cursive",
+  "marktobase",
+  "marktoligature",
+  "marktomark",
+  "context",
+  "chainedcontext",
+  "extension",
+}
+local chaindirections={
+  context=0,
+  chainedcontext=1,
+  reversechainedcontextsingle=-1,
+}
+local function setmetrics(data,where,tag,d)
+  local w=data[where]
+  if w then
+    local v=w[tag]
+    if v then
+      w[tag]=v+d
+    end
+  end
+end
+local variabletags={
+  hasc=function(data,d) setmetrics(data,"windowsmetrics","typoascender",d) end,
+  hdsc=function(data,d) setmetrics(data,"windowsmetrics","typodescender",d) end,
+  hlgp=function(data,d) setmetrics(data,"windowsmetrics","typolinegap",d) end,
+  hcla=function(data,d) setmetrics(data,"windowsmetrics","winascent",d) end,
+  hcld=function(data,d) setmetrics(data,"windowsmetrics","windescent",d) end,
+  vasc=function(data,d) setmetrics(data,"vhea not done","ascent",d) end,
+  vdsc=function(data,d) setmetrics(data,"vhea not done","descent",d) end,
+  vlgp=function(data,d) setmetrics(data,"vhea not done","linegap",d) end,
+  xhgt=function(data,d) setmetrics(data,"windowsmetrics","xheight",d) end,
+  cpht=function(data,d) setmetrics(data,"windowsmetrics","capheight",d) end,
+  sbxs=function(data,d) setmetrics(data,"windowsmetrics","subscriptxsize",d) end,
+  sbys=function(data,d) setmetrics(data,"windowsmetrics","subscriptysize",d) end,
+  sbxo=function(data,d) setmetrics(data,"windowsmetrics","subscriptxoffset",d) end,
+  sbyo=function(data,d) setmetrics(data,"windowsmetrics","subscriptyoffset",d) end,
+  spxs=function(data,d) setmetrics(data,"windowsmetrics","superscriptxsize",d) end,
+  spys=function(data,d) setmetrics(data,"windowsmetrics","superscriptysize",d) end,
+  spxo=function(data,d) setmetrics(data,"windowsmetrics","superscriptxoffset",d) end,
+  spyo=function(data,d) setmetrics(data,"windowsmetrics","superscriptyoffset",d) end,
+  strs=function(data,d) setmetrics(data,"windowsmetrics","strikeoutsize",d) end,
+  stro=function(data,d) setmetrics(data,"windowsmetrics","strikeoutpos",d) end,
+  unds=function(data,d) setmetrics(data,"postscript","underlineposition",d) end,
+  undo=function(data,d) setmetrics(data,"postscript","underlinethickness",d) end,
+}
+local read_cardinal={
+  streamreader.readcardinal1,
+  streamreader.readcardinal2,
+  streamreader.readcardinal3,
+  streamreader.readcardinal4,
+}
+local read_integer={
+  streamreader.readinteger1,
+  streamreader.readinteger2,
+  streamreader.readinteger3,
+  streamreader.readinteger4,
+}
+local lookupnames={
+  gsub={
+    single="gsub_single",
+    multiple="gsub_multiple",
+    alternate="gsub_alternate",
+    ligature="gsub_ligature",
+    context="gsub_context",
+    chainedcontext="gsub_contextchain",
+    reversechainedcontextsingle="gsub_reversecontextchain",
+  },
+  gpos={
+    single="gpos_single",
+    pair="gpos_pair",
+    cursive="gpos_cursive",
+    marktobase="gpos_mark2base",
+    marktoligature="gpos_mark2ligature",
+    marktomark="gpos_mark2mark",
+    context="gpos_context",
+    chainedcontext="gpos_contextchain",
+  }
+}
+local lookupflags=setmetatableindex(function(t,k)
+  local v={
+    bittest(k,0x0008) and true or false,
+    bittest(k,0x0004) and true or false,
+    bittest(k,0x0002) and true or false,
+    bittest(k,0x0001) and true or false,
+  }
+  t[k]=v
+  return v
+end)
+local pattern=lpeg.Cf (
+  lpeg.Ct("")*lpeg.Cg (
+    lpeg.C((lpeg.R("az","09")+lpeg.P(" "))^1)*lpeg.S(" :=")*(lpeg.patterns.number/tonumber)*lpeg.S(" ,")^0
+  )^1,rawset
+)
+local hash=table.setmetatableindex(function(t,k)
+  local v=lpegmatch(pattern,k)
+  local t={}
+  for k,v in sortedhash(v) do
+    t[#t+1]=k.."="..v
+  end
+  v=concat(t,",")
+  t[k]=v
+  return v
+end)
+helpers.normalizedaxishash=hash
+local cleanname=fonts.names and fonts.names.cleanname or function(name)
+  return name and (gsub(lower(name),"[^%a%d]","")) or nil
+end
+helpers.cleanname=cleanname
+function helpers.normalizedaxis(str)
+  return hash[str] or str
+end
+local function axistofactors(str)
+  return lpegmatch(pattern,str)
+end
+local function getaxisscale(segments,minimum,default,maximum,user)
+  if not minimum or not default or not maximum then
+    return false
+  end
+  if user<minimum then
+    user=minimum
+  elseif user>maximum then
+    user=maximum
+  end
+  if user<default then
+    default=- (default-user)/(default-minimum)
+  elseif user>default then
+    default=(user-default)/(maximum-default)
+  else
+    default=0
+  end
+  if not segments then
+    return default
+  end
+  local e
+  for i=1,#segments do
+    local s=segments[i]
+    if type(s)~="number" then
+      report("using default axis scale")
+      return default
+    elseif s[1]>=default then
+      if s[2]==default then
+        return default
+      else
+        e=i
+        break
+      end
+    end
+  end
+  if e then
+    local b=segments[e-1]
+    local e=segments[e]
+    return b[2]+(e[2]-b[2])*(default-b[1])/(e[1]-b[1])
+  else
+    return false
+  end
+end
+local function getfactors(data,instancespec)
+  if instancespec==true then
+  elseif type(instancespec)~="string" or instancespec=="" then
+    return
+  end
+  local variabledata=data.variabledata
+  if not variabledata then
+    return
+  end
+  local instances=variabledata.instances
+  local axis=variabledata.axis
+  local segments=variabledata.segments
+  if instances and axis then
+    local values
+    if instancespec==true then
+      values={}
+      for i=1,#axis do
+        values[i]={
+          value=axis[i].default,
+        }
+      end
+    else
+      for i=1,#instances do
+        local instance=instances[i]
+        if cleanname(instance.subfamily)==instancespec then
+          values=instance.values
+          break
+        end
+      end
+    end
+    if values then
+      local factors={}
+      for i=1,#axis do
+        local a=axis[i]
+        factors[i]=getaxisscale(segments,a.minimum,a.default,a.maximum,values[i].value)
+      end
+      return factors
+    end
+    local values=axistofactors(hash[instancespec] or instancespec)
+    if values then
+      local factors={}
+      for i=1,#axis do
+        local a=axis[i]
+        local d=a.default
+        factors[i]=getaxisscale(segments,a.minimum,d,a.maximum,values[a.name or a.tag] or d)
+      end
+      return factors
+    end
+  end
+end
+local function getscales(regions,factors)
+  local scales={}
+  for i=1,#regions do
+    local region=regions[i]
+    local s=1
+    for j=1,#region do
+      local axis=region[j]
+      local f=factors[j]
+      local start=axis.start
+      local peak=axis.peak
+      local stop=axis.stop
+      if start>peak or peak>stop then
+      elseif start<0 and stop>0 and peak~=0 then
+      elseif peak==0 then
+      elseif f<start or f>stop then
+        s=0
+        break
+      elseif f<peak then
+        s=s*(f-start)/(peak-start)
+      elseif f>peak then
+        s=s*(stop-f)/(stop-peak)
+      else
+      end
+    end
+    scales[i]=s
+  end
+  return scales
+end
+helpers.getaxisscale=getaxisscale
+helpers.getfactors=getfactors
+helpers.getscales=getscales
+helpers.axistofactors=axistofactors
+local function readvariationdata(f,storeoffset,factors) 
+  local position=getposition(f)
+  setposition(f,storeoffset)
+  local format=readushort(f)
+  local regionoffset=storeoffset+readulong(f)
+  local nofdeltadata=readushort(f)
+  local deltadata={}
+  for i=1,nofdeltadata do
+    deltadata[i]=readulong(f)
+  end
+  setposition(f,regionoffset)
+  local nofaxis=readushort(f)
+  local nofregions=readushort(f)
+  local regions={}
+  for i=1,nofregions do 
+    local t={}
+    for i=1,nofaxis do
+      t[i]={ 
+        start=read2dot14(f),
+        peak=read2dot14(f),
+        stop=read2dot14(f),
+      }
+    end
+    regions[i]=t
+  end
+  if factors then
+    for i=1,nofdeltadata do
+      setposition(f,storeoffset+deltadata[i])
+      local nofdeltasets=readushort(f)
+      local nofshorts=readushort(f)
+      local nofregions=readushort(f)
+      local usedregions={}
+      local deltas={}
+      for i=1,nofregions do
+        usedregions[i]=regions[readushort(f)+1]
+      end
+      for i=1,nofdeltasets do
+        local t={} 
+        for i=1,nofshorts do
+          t[i]=readshort(f)
+        end
+        for i=nofshorts+1,nofregions do
+          t[i]=readinteger(f)
+        end
+        deltas[i]=t
+      end
+      deltadata[i]={
+        regions=usedregions,
+        deltas=deltas,
+        scales=factors and getscales(usedregions,factors) or nil,
+      }
+    end
+  end
+  setposition(f,position)
+  return regions,deltadata
+end
+helpers.readvariationdata=readvariationdata
+local function readcoverage(f,offset,simple)
+  setposition(f,offset)
+  local coverageformat=readushort(f)
+  local coverage={}
+  if coverageformat==1 then
+    local nofcoverage=readushort(f)
+    if simple then
+      for i=1,nofcoverage do
+        coverage[i]=readushort(f)
+      end
+    else
+      for i=0,nofcoverage-1 do
+        coverage[readushort(f)]=i 
+      end
+    end
+  elseif coverageformat==2 then
+    local nofranges=readushort(f)
+    local n=simple and 1 or 0 
+    for i=1,nofranges do
+      local firstindex=readushort(f)
+      local lastindex=readushort(f)
+      local coverindex=readushort(f)
+      if simple then
+        for i=firstindex,lastindex do
+          coverage[n]=i
+          n=n+1
+        end
+      else
+        for i=firstindex,lastindex do
+          coverage[i]=n
+          n=n+1
+        end
+      end
+    end
+  else
+    report("unknown coverage format %a ",coverageformat)
+  end
+  return coverage
+end
+local function readclassdef(f,offset,preset)
+  setposition(f,offset)
+  local classdefformat=readushort(f)
+  local classdef={}
+  if type(preset)=="number" then
+    for k=0,preset-1 do
+      classdef[k]=1
+    end
+  end
+  if classdefformat==1 then
+    local index=readushort(f)
+    local nofclassdef=readushort(f)
+    for i=1,nofclassdef do
+      classdef[index]=readushort(f)+1
+      index=index+1
+    end
+  elseif classdefformat==2 then
+    local nofranges=readushort(f)
+    local n=0
+    for i=1,nofranges do
+      local firstindex=readushort(f)
+      local lastindex=readushort(f)
+      local class=readushort(f)+1
+      for i=firstindex,lastindex do
+        classdef[i]=class
+      end
+    end
+  else
+    report("unknown classdef format %a ",classdefformat)
+  end
+  if type(preset)=="table" then
+    for k in next,preset do
+      if not classdef[k] then
+        classdef[k]=1
+      end
+    end
+  end
+  return classdef
+end
+local function classtocoverage(defs)
+  if defs then
+    local list={}
+    for index,class in next,defs do
+      local c=list[class]
+      if c then
+        c[#c+1]=index
+      else
+        list[class]={ index }
+      end
+    end
+    return list
+  end
+end
+local skips={ [0]=0,
+  1,
+  1,
+  2,
+  1,
+  2,
+  2,
+  3,
+  2,
+  2,
+  3,
+  2,
+  3,
+  3,
+  4,
+}
+local function readvariation(f,offset)
+  local p=getposition(f)
+  setposition(f,offset)
+  local outer=readushort(f)
+  local inner=readushort(f)
+  local format=readushort(f)
+  setposition(f,p)
+  if format==0x8000 then
+    return outer,inner
+  end
+end
+local function readposition(f,format,mainoffset,getdelta)
+  if format==0 then
+    return false
+  end
+  if format==0x04 then
+    local h=readshort(f)
+    if h==0 then
+      return true 
+    else
+      return { 0,0,h,0 }
+    end
+  end
+  if format==0x05 then
+    local x=readshort(f)
+    local h=readshort(f)
+    if x==0 and h==0 then
+      return true 
+    else
+      return { x,0,h,0 }
+    end
+  end
+  if format==0x44 then
+    local h=readshort(f)
+    if getdelta then
+      local d=readshort(f) 
+      if d>0 then
+        local outer,inner=readvariation(f,mainoffset+d)
+        if outer then
+          h=h+getdelta(outer,inner)
+        end
+      end
+    else
+      skipshort(f,1)
+    end
+    if h==0 then
+      return true 
+    else
+      return { 0,0,h,0 }
+    end
+  end
+  local x=bittest(format,0x01) and readshort(f) or 0 
+  local y=bittest(format,0x02) and readshort(f) or 0 
+  local h=bittest(format,0x04) and readshort(f) or 0 
+  local v=bittest(format,0x08) and readshort(f) or 0 
+  if format>=0x10 then
+    local X=bittest(format,0x10) and skipshort(f) or 0
+    local Y=bittest(format,0x20) and skipshort(f) or 0
+    local H=bittest(format,0x40) and skipshort(f) or 0
+    local V=bittest(format,0x80) and skipshort(f) or 0
+    local s=skips[extract(format,4,4)]
+    if s>0 then
+      skipshort(f,s)
+    end
+    if getdelta then
+      if X>0 then
+        local outer,inner=readvariation(f,mainoffset+X)
+        if outer then
+          x=x+getdelta(outer,inner)
+        end
+      end
+      if Y>0 then
+        local outer,inner=readvariation(f,mainoffset+Y)
+        if outer then
+          y=y+getdelta(outer,inner)
+        end
+      end
+      if H>0 then
+        local outer,inner=readvariation(f,mainoffset+H)
+        if outer then
+          h=h+getdelta(outer,inner)
+        end
+      end
+      if V>0 then
+        local outer,inner=readvariation(f,mainoffset+V)
+        if outer then
+          v=v+getdelta(outer,inner)
+        end
+      end
+    end
+    return { x,y,h,v }
+  elseif x==0 and y==0 and h==0 and v==0 then
+    return true 
+  else
+    return { x,y,h,v }
+  end
+end
+local function readanchor(f,offset,getdelta) 
+  if not offset or offset==0 then
+    return nil 
+  end
+  setposition(f,offset)
+  local format=readshort(f) 
+  local x=readshort(f)
+  local y=readshort(f)
+  if format==3 then
+    if getdelta then
+      local X=readshort(f)
+      local Y=readshort(f)
+      if X>0 then
+        local outer,inner=readvariation(f,offset+X)
+        if outer then
+          x=x+getdelta(outer,inner)
+        end
+      end
+      if Y>0 then
+        local outer,inner=readvariation(f,offset+Y)
+        if outer then
+          y=y+getdelta(outer,inner)
+        end
+      end
+    else
+      skipshort(f,2)
+    end
+    return { x,y } 
+  else
+    return { x,y }
+  end
+end
+local function readfirst(f,offset)
+  if offset then
+    setposition(f,offset)
+  end
+  return { readushort(f) }
+end
+local function readarray(f,offset,first)
+  if offset then
+    setposition(f,offset)
+  end
+  local n=readushort(f)
+  if first then
+    local t={ first }
+    for i=2,n do
+      t[i]=readushort(f)
+    end
+    return t,n
+  elseif n>0 then
+    local t={}
+    for i=1,n do
+      t[i]=readushort(f)
+    end
+    return t,n
+  end
+end
+local function readcoveragearray(f,offset,t,simple)
+  if not t then
+    return nil
+  end
+  local n=#t
+  if n==0 then
+    return nil
+  end
+  for i=1,n do
+    t[i]=readcoverage(f,offset+t[i],simple)
+  end
+  return t
+end
+local function covered(subset,all)
+  local used,u
+  for i=1,#subset do
+    local s=subset[i]
+    if all[s] then
+      if used then
+        u=u+1
+        used[u]=s
+      else
+        u=1
+        used={ s }
+      end
+    end
+  end
+  return used
+end
+local function readlookuparray(f,noflookups,nofcurrent)
+  local lookups={}
+  if noflookups>0 then
+    local length=0
+    for i=1,noflookups do
+      local index=readushort(f)+1
+      if index>length then
+        length=index
+      end
+      local lookup=readushort(f)+1
+      local list=lookups[index]
+      if list then
+        list[#list+1]=lookup
+      else
+        lookups[index]={ lookup }
+      end
+    end
+    for index=1,length do
+      if not lookups[index] then
+        lookups[index]=false
+      end
+    end
+  end
+  return lookups
+end
+local function unchainedcontext(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,what)
+  local tableoffset=lookupoffset+offset
+  setposition(f,tableoffset)
+  local subtype=readushort(f)
+  if subtype==1 then
+    local coverage=readushort(f)
+    local subclasssets=readarray(f)
+    local rules={}
+    if subclasssets then
+      coverage=readcoverage(f,tableoffset+coverage,true)
+      for i=1,#subclasssets do
+        local offset=subclasssets[i]
+        if offset>0 then
+          local firstcoverage=coverage[i]
+          local rulesoffset=tableoffset+offset
+          local subclassrules=readarray(f,rulesoffset)
+          for rule=1,#subclassrules do
+            setposition(f,rulesoffset+subclassrules[rule])
+            local nofcurrent=readushort(f)
+            local noflookups=readushort(f)
+            local current={ { firstcoverage } }
+            for i=2,nofcurrent do
+              current[i]={ readushort(f) }
+            end
+            local lookups=readlookuparray(f,noflookups,nofcurrent)
+            rules[#rules+1]={
+              current=current,
+              lookups=lookups
+            }
+          end
+        end
+      end
+    else
+      report("empty subclassset in %a subtype %i","unchainedcontext",subtype)
+    end
+    return {
+      format="glyphs",
+      rules=rules,
+    }
+  elseif subtype==2 then
+    local coverage=readushort(f)
+    local currentclassdef=readushort(f)
+    local subclasssets=readarray(f)
+    local rules={}
+    if subclasssets then
+      coverage=readcoverage(f,tableoffset+coverage)
+      currentclassdef=readclassdef(f,tableoffset+currentclassdef,coverage)
+      local currentclasses=classtocoverage(currentclassdef,fontdata.glyphs)
+      for class=1,#subclasssets do
+        local offset=subclasssets[class]
+        if offset>0 then
+          local firstcoverage=currentclasses[class]
+          if firstcoverage then
+            firstcoverage=covered(firstcoverage,coverage) 
+            if firstcoverage then
+              local rulesoffset=tableoffset+offset
+              local subclassrules=readarray(f,rulesoffset)
+              for rule=1,#subclassrules do
+                setposition(f,rulesoffset+subclassrules[rule])
+                local nofcurrent=readushort(f)
+                local noflookups=readushort(f)
+                local current={ firstcoverage }
+                for i=2,nofcurrent do
+                  current[i]=currentclasses[readushort(f)+1]
+                end
+                local lookups=readlookuparray(f,noflookups,nofcurrent)
+                rules[#rules+1]={
+                  current=current,
+                  lookups=lookups
+                }
+              end
+            else
+              report("no coverage")
+            end
+          else
+            report("no coverage class")
+          end
+        end
+      end
+    else
+      report("empty subclassset in %a subtype %i","unchainedcontext",subtype)
+    end
+    return {
+      format="class",
+      rules=rules,
+    }
+  elseif subtype==3 then
+    local current=readarray(f)
+    local noflookups=readushort(f)
+    local lookups=readlookuparray(f,noflookups,#current)
+    current=readcoveragearray(f,tableoffset,current,true)
+    return {
+      format="coverage",
+      rules={
+        {
+          current=current,
+          lookups=lookups,
+        }
+      }
+    }
+  else
+    report("unsupported subtype %a in %a %s",subtype,"unchainedcontext",what)
+  end
+end
+local function chainedcontext(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,what)
+  local tableoffset=lookupoffset+offset
+  setposition(f,tableoffset)
+  local subtype=readushort(f)
+  if subtype==1 then
+    local coverage=readushort(f)
+    local subclasssets=readarray(f)
+    local rules={}
+    if subclasssets then
+      coverage=readcoverage(f,tableoffset+coverage,true)
+      for i=1,#subclasssets do
+        local offset=subclasssets[i]
+        if offset>0 then
+          local firstcoverage=coverage[i]
+          local rulesoffset=tableoffset+offset
+          local subclassrules=readarray(f,rulesoffset)
+          for rule=1,#subclassrules do
+            setposition(f,rulesoffset+subclassrules[rule])
+            local nofbefore=readushort(f)
+            local before
+            if nofbefore>0 then
+              before={}
+              for i=1,nofbefore do
+                before[i]={ readushort(f) }
+              end
+            end
+            local nofcurrent=readushort(f)
+            local current={ { firstcoverage } }
+            for i=2,nofcurrent do
+              current[i]={ readushort(f) }
+            end
+            local nofafter=readushort(f)
+            local after
+            if nofafter>0 then
+              after={}
+              for i=1,nofafter do
+                after[i]={ readushort(f) }
+              end
+            end
+            local noflookups=readushort(f)
+            local lookups=readlookuparray(f,noflookups,nofcurrent)
+            rules[#rules+1]={
+              before=before,
+              current=current,
+              after=after,
+              lookups=lookups,
+            }
+          end
+        end
+      end
+    else
+      report("empty subclassset in %a subtype %i","chainedcontext",subtype)
+    end
+    return {
+      format="glyphs",
+      rules=rules,
+    }
+  elseif subtype==2 then
+    local coverage=readushort(f)
+    local beforeclassdef=readushort(f)
+    local currentclassdef=readushort(f)
+    local afterclassdef=readushort(f)
+    local subclasssets=readarray(f)
+    local rules={}
+    if subclasssets then
+      local coverage=readcoverage(f,tableoffset+coverage)
+      local beforeclassdef=readclassdef(f,tableoffset+beforeclassdef,nofglyphs)
+      local currentclassdef=readclassdef(f,tableoffset+currentclassdef,coverage)
+      local afterclassdef=readclassdef(f,tableoffset+afterclassdef,nofglyphs)
+      local beforeclasses=classtocoverage(beforeclassdef,fontdata.glyphs)
+      local currentclasses=classtocoverage(currentclassdef,fontdata.glyphs)
+      local afterclasses=classtocoverage(afterclassdef,fontdata.glyphs)
+      for class=1,#subclasssets do
+        local offset=subclasssets[class]
+        if offset>0 then
+          local firstcoverage=currentclasses[class]
+          if firstcoverage then
+            firstcoverage=covered(firstcoverage,coverage) 
+            if firstcoverage then
+              local rulesoffset=tableoffset+offset
+              local subclassrules=readarray(f,rulesoffset)
+              for rule=1,#subclassrules do
+                setposition(f,rulesoffset+subclassrules[rule])
+                local nofbefore=readushort(f)
+                local before
+                if nofbefore>0 then
+                  before={}
+                  for i=1,nofbefore do
+                    before[i]=beforeclasses[readushort(f)+1]
+                  end
+                end
+                local nofcurrent=readushort(f)
+                local current={ firstcoverage }
+                for i=2,nofcurrent do
+                  current[i]=currentclasses[readushort(f)+1]
+                end
+                local nofafter=readushort(f)
+                local after
+                if nofafter>0 then
+                  after={}
+                  for i=1,nofafter do
+                    after[i]=afterclasses[readushort(f)+1]
+                  end
+                end
+                local noflookups=readushort(f)
+                local lookups=readlookuparray(f,noflookups,nofcurrent)
+                rules[#rules+1]={
+                  before=before,
+                  current=current,
+                  after=after,
+                  lookups=lookups,
+                }
+              end
+            else
+              report("no coverage")
+            end
+          else
+            report("class is not covered")
+          end
+        end
+      end
+    else
+      report("empty subclassset in %a subtype %i","chainedcontext",subtype)
+    end
+    return {
+      format="class",
+      rules=rules,
+    }
+  elseif subtype==3 then
+    local before=readarray(f)
+    local current=readarray(f)
+    local after=readarray(f)
+    local noflookups=readushort(f)
+    local lookups=readlookuparray(f,noflookups,#current)
+    before=readcoveragearray(f,tableoffset,before,true)
+    current=readcoveragearray(f,tableoffset,current,true)
+    after=readcoveragearray(f,tableoffset,after,true)
+    return {
+      format="coverage",
+      rules={
+        {
+          before=before,
+          current=current,
+          after=after,
+          lookups=lookups,
+        }
+      }
+    }
+  else
+    report("unsupported subtype %a in %a %s",subtype,"chainedcontext",what)
+  end
+end
+local function extension(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,types,handlers,what)
+  local tableoffset=lookupoffset+offset
+  setposition(f,tableoffset)
+  local subtype=readushort(f)
+  if subtype==1 then
+    local lookuptype=types[readushort(f)]
+    local faroffset=readulong(f)
+    local handler=handlers[lookuptype]
+    if handler then
+      return handler(f,fontdata,lookupid,tableoffset+faroffset,0,glyphs,nofglyphs),lookuptype
+    else
+      report("no handler for lookuptype %a subtype %a in %s %s",lookuptype,subtype,what,"extension")
+    end
+  else
+    report("unsupported subtype %a in %s %s",subtype,what,"extension")
+  end
+end
+function gsubhandlers.single(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  local tableoffset=lookupoffset+offset
+  setposition(f,tableoffset)
+  local subtype=readushort(f)
+  if subtype==1 then
+    local coverage=readushort(f)
+    local delta=readshort(f) 
+    local coverage=readcoverage(f,tableoffset+coverage) 
+    for index in next,coverage do
+      local newindex=index+delta
+      if index>nofglyphs or newindex>nofglyphs then
+        report("invalid index in %s format %i: %i -> %i (max %i)","single",subtype,index,newindex,nofglyphs)
+        coverage[index]=nil
+      else
+        coverage[index]=newindex
+      end
+    end
+    return {
+      coverage=coverage
+    }
+  elseif subtype==2 then 
+    local coverage=readushort(f)
+    local nofreplacements=readushort(f)
+    local replacements={}
+    for i=1,nofreplacements do
+      replacements[i]=readushort(f)
+    end
+    local coverage=readcoverage(f,tableoffset+coverage) 
+    for index,newindex in next,coverage do
+      newindex=newindex+1
+      if index>nofglyphs or newindex>nofglyphs then
+        report("invalid index in %s format %i: %i -> %i (max %i)","single",subtype,index,newindex,nofglyphs)
+        coverage[index]=nil
+      else
+        coverage[index]=replacements[newindex]
+      end
+    end
+    return {
+      coverage=coverage
+    }
+  else
+    report("unsupported subtype %a in %a substitution",subtype,"single")
+  end
+end
+local function sethandler(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,what)
+  local tableoffset=lookupoffset+offset
+  setposition(f,tableoffset)
+  local subtype=readushort(f)
+  if subtype==1 then
+    local coverage=readushort(f)
+    local nofsequence=readushort(f)
+    local sequences={}
+    for i=1,nofsequence do
+      sequences[i]=readushort(f)
+    end
+    for i=1,nofsequence do
+      setposition(f,tableoffset+sequences[i])
+      local n=readushort(f)
+      local s={}
+      for i=1,n do
+        s[i]=readushort(f)
+      end
+      sequences[i]=s
+    end
+    local coverage=readcoverage(f,tableoffset+coverage)
+    for index,newindex in next,coverage do
+      newindex=newindex+1
+      if index>nofglyphs or newindex>nofglyphs then
+        report("invalid index in %s format %i: %i -> %i (max %i)",what,subtype,index,newindex,nofglyphs)
+        coverage[index]=nil
+      else
+        coverage[index]=sequences[newindex]
+      end
+    end
+    return {
+      coverage=coverage
+    }
+  else
+    report("unsupported subtype %a in %a substitution",subtype,what)
+  end
+end
+function gsubhandlers.multiple(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  return sethandler(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,"multiple")
+end
+function gsubhandlers.alternate(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  return sethandler(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,"alternate")
+end
+function gsubhandlers.ligature(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  local tableoffset=lookupoffset+offset
+  setposition(f,tableoffset)
+  local subtype=readushort(f)
+  if subtype==1 then
+    local coverage=readushort(f)
+    local nofsets=readushort(f)
+    local ligatures={}
+    for i=1,nofsets do
+      ligatures[i]=readushort(f)
+    end
+    for i=1,nofsets do
+      local offset=lookupoffset+offset+ligatures[i]
+      setposition(f,offset)
+      local n=readushort(f)
+      local l={}
+      for i=1,n do
+        l[i]=offset+readushort(f)
+      end
+      ligatures[i]=l
+    end
+    local coverage=readcoverage(f,tableoffset+coverage)
+    for index,newindex in next,coverage do
+      local hash={}
+      local ligatures=ligatures[newindex+1]
+      for i=1,#ligatures do
+        local offset=ligatures[i]
+        setposition(f,offset)
+        local lig=readushort(f)
+        local cnt=readushort(f)
+        local hsh=hash
+        for i=2,cnt do
+          local c=readushort(f)
+          local h=hsh[c]
+          if not h then
+            h={}
+            hsh[c]=h
+          end
+          hsh=h
+        end
+        hsh.ligature=lig
+      end
+      coverage[index]=hash
+    end
+    return {
+      coverage=coverage
+    }
+  else
+    report("unsupported subtype %a in %a substitution",subtype,"ligature")
+  end
+end
+function gsubhandlers.context(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  return unchainedcontext(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,"substitution"),"context"
+end
+function gsubhandlers.chainedcontext(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  return chainedcontext(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,"substitution"),"chainedcontext"
+end
+function gsubhandlers.extension(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  return extension(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,gsubtypes,gsubhandlers,"substitution")
+end
+function gsubhandlers.reversechainedcontextsingle(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  local tableoffset=lookupoffset+offset
+  setposition(f,tableoffset)
+  local subtype=readushort(f)
+  if subtype==1 then 
+    local current=readfirst(f)
+    local before=readarray(f)
+    local after=readarray(f)
+    local replacements=readarray(f)
+    current=readcoveragearray(f,tableoffset,current,true)
+    before=readcoveragearray(f,tableoffset,before,true)
+    after=readcoveragearray(f,tableoffset,after,true)
+    return {
+      format="reversecoverage",
+      rules={
+        {
+          before=before,
+          current=current,
+          after=after,
+          replacements=replacements,
+        }
+      }
+    },"reversechainedcontextsingle"
+  else
+    report("unsupported subtype %a in %a substitution",subtype,"reversechainedcontextsingle")
+  end
+end
+local function readpairsets(f,tableoffset,sets,format1,format2,mainoffset,getdelta)
+  local done={}
+  for i=1,#sets do
+    local offset=sets[i]
+    local reused=done[offset]
+    if not reused then
+      offset=tableoffset+offset
+      setposition(f,offset)
+      local n=readushort(f)
+      reused={}
+      for i=1,n do
+        reused[i]={
+          readushort(f),
+          readposition(f,format1,offset,getdelta),
+          readposition(f,format2,offset,getdelta),
+        }
+      end
+      done[offset]=reused
+    end
+    sets[i]=reused
+  end
+  return sets
+end
+local function readpairclasssets(f,nofclasses1,nofclasses2,format1,format2,mainoffset,getdelta)
+  local classlist1={}
+  for i=1,nofclasses1 do
+    local classlist2={}
+    classlist1[i]=classlist2
+    for j=1,nofclasses2 do
+      local one=readposition(f,format1,mainoffset,getdelta)
+      local two=readposition(f,format2,mainoffset,getdelta)
+      if one or two then
+        classlist2[j]={ one,two }
+      else
+        classlist2[j]=false
+      end
+    end
+  end
+  return classlist1
+end
+function gposhandlers.single(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  local tableoffset=lookupoffset+offset
+  setposition(f,tableoffset)
+  local subtype=readushort(f)
+  local getdelta=fontdata.temporary.getdelta
+  if subtype==1 then
+    local coverage=readushort(f)
+    local format=readushort(f)
+    local value=readposition(f,format,tableoffset,getdelta)
+    local coverage=readcoverage(f,tableoffset+coverage)
+    for index,newindex in next,coverage do
+      coverage[index]=value
+    end
+    return {
+      format="single",
+      coverage=coverage,
+    }
+  elseif subtype==2 then
+    local coverage=readushort(f)
+    local format=readushort(f)
+    local nofvalues=readushort(f)
+    local values={}
+    for i=1,nofvalues do
+      values[i]=readposition(f,format,tableoffset,getdelta)
+    end
+    local coverage=readcoverage(f,tableoffset+coverage)
+    for index,newindex in next,coverage do
+      coverage[index]=values[newindex+1]
+    end
+    return {
+      format="single",
+      coverage=coverage,
+    }
+  else
+    report("unsupported subtype %a in %a positioning",subtype,"single")
+  end
+end
+function gposhandlers.pair(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  local tableoffset=lookupoffset+offset
+  setposition(f,tableoffset)
+  local subtype=readushort(f)
+  local getdelta=fontdata.temporary.getdelta
+  if subtype==1 then
+    local coverage=readushort(f)
+    local format1=readushort(f)
+    local format2=readushort(f)
+    local sets=readarray(f)
+       sets=readpairsets(f,tableoffset,sets,format1,format2,mainoffset,getdelta)
+       coverage=readcoverage(f,tableoffset+coverage)
+    for index,newindex in next,coverage do
+      local set=sets[newindex+1]
+      local hash={}
+      for i=1,#set do
+        local value=set[i]
+        if value then
+          local other=value[1]
+          local first=value[2]
+          local second=value[3]
+          if first or second then
+            hash[other]={ first,second or nil } 
+          else
+            hash[other]=nil 
+          end
+        end
+      end
+      coverage[index]=hash
+    end
+    return {
+      format="pair",
+      coverage=coverage,
+    }
+  elseif subtype==2 then
+    local coverage=readushort(f)
+    local format1=readushort(f)
+    local format2=readushort(f)
+    local classdef1=readushort(f)
+    local classdef2=readushort(f)
+    local nofclasses1=readushort(f) 
+    local nofclasses2=readushort(f) 
+    local classlist=readpairclasssets(f,nofclasses1,nofclasses2,format1,format2,tableoffset,getdelta)
+       coverage=readcoverage(f,tableoffset+coverage)
+       classdef1=readclassdef(f,tableoffset+classdef1,coverage)
+       classdef2=readclassdef(f,tableoffset+classdef2,nofglyphs)
+    local usedcoverage={}
+    for g1,c1 in next,classdef1 do
+      if coverage[g1] then
+        local l1=classlist[c1]
+        if l1 then
+          local hash={}
+          for paired,class in next,classdef2 do
+            local offsets=l1[class]
+            if offsets then
+              local first=offsets[1]
+              local second=offsets[2]
+              if first or second then
+                hash[paired]={ first,second or nil }
+              else
+              end
+            end
+          end
+          usedcoverage[g1]=hash
+        end
+      end
+    end
+    return {
+      format="pair",
+      coverage=usedcoverage,
+    }
+  elseif subtype==3 then
+    report("yet unsupported subtype %a in %a positioning",subtype,"pair")
+  else
+    report("unsupported subtype %a in %a positioning",subtype,"pair")
+  end
+end
+function gposhandlers.cursive(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  local tableoffset=lookupoffset+offset
+  setposition(f,tableoffset)
+  local subtype=readushort(f)
+  local getdelta=fontdata.temporary.getdelta
+  if subtype==1 then
+    local coverage=tableoffset+readushort(f)
+    local nofrecords=readushort(f)
+    local records={}
+    for i=1,nofrecords do
+      local entry=readushort(f)
+      local exit=readushort(f)
+      records[i]={
+        entry~=0 and (tableoffset+entry) or false,
+        exit~=0 and (tableoffset+exit ) or nil,
+      }
+    end
+    local cc=(fontdata.temporary.cursivecount or 0)+1
+    fontdata.temporary.cursivecount=cc
+    cc="cc-"..cc
+    coverage=readcoverage(f,coverage)
+    for i=1,nofrecords do
+      local r=records[i]
+      records[i]={
+        cc,
+        readanchor(f,r[1],getdelta) or false,
+        readanchor(f,r[2],getdelta) or nil,
+      }
+    end
+    for index,newindex in next,coverage do
+      coverage[index]=records[newindex+1]
+    end
+    return {
+      coverage=coverage,
+    }
+  else
+    report("unsupported subtype %a in %a positioning",subtype,"cursive")
+  end
+end
+local function handlemark(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,ligature)
+  local tableoffset=lookupoffset+offset
+  setposition(f,tableoffset)
+  local subtype=readushort(f)
+  local getdelta=fontdata.temporary.getdelta
+  if subtype==1 then
+    local markcoverage=tableoffset+readushort(f)
+    local basecoverage=tableoffset+readushort(f)
+    local nofclasses=readushort(f)
+    local markoffset=tableoffset+readushort(f)
+    local baseoffset=tableoffset+readushort(f)
+    local markcoverage=readcoverage(f,markcoverage)
+    local basecoverage=readcoverage(f,basecoverage,true)
+    setposition(f,markoffset)
+    local markclasses={}
+    local nofmarkclasses=readushort(f)
+    local lastanchor=fontdata.lastanchor or 0
+    local usedanchors={}
+    for i=1,nofmarkclasses do
+      local class=readushort(f)+1
+      local offset=readushort(f)
+      if offset==0 then
+        markclasses[i]=false
+      else
+        markclasses[i]={ class,markoffset+offset }
+      end
+      usedanchors[class]=true
+    end
+    for i=1,nofmarkclasses do
+      local mc=markclasses[i]
+      if mc then
+        mc[2]=readanchor(f,mc[2],getdelta)
+      end
+    end
+    setposition(f,baseoffset)
+    local nofbaserecords=readushort(f)
+    local baserecords={}
+    if ligature then
+      for i=1,nofbaserecords do 
+        local offset=readushort(f)
+        if offset==0 then
+          baserecords[i]=false
+        else
+          baserecords[i]=baseoffset+offset
+        end
+      end
+      for i=1,nofbaserecords do
+        local recordoffset=baserecords[i]
+        if recordoffset then
+          setposition(f,recordoffset)
+          local nofcomponents=readushort(f)
+          local components={}
+          for i=1,nofcomponents do
+            local classes={}
+            for i=1,nofclasses do
+              local offset=readushort(f)
+              if offset~=0 then
+                classes[i]=recordoffset+offset
+              else
+                classes[i]=false
+              end
+            end
+            components[i]=classes
+          end
+          baserecords[i]=components
+        end
+      end
+      local baseclasses={} 
+      for i=1,nofclasses do
+        baseclasses[i]={}
+      end
+      for i=1,nofbaserecords do
+        local components=baserecords[i]
+        if components then
+          local b=basecoverage[i]
+          for c=1,#components do
+            local classes=components[c]
+            if classes then
+              for i=1,nofclasses do
+                local anchor=readanchor(f,classes[i],getdelta)
+                local bclass=baseclasses[i]
+                local bentry=bclass[b]
+                if bentry then
+                  bentry[c]=anchor
+                else
+                  bclass[b]={ [c]=anchor }
+                end
+              end
+            end
+          end
+        end
+      end
+      for index,newindex in next,markcoverage do
+        markcoverage[index]=markclasses[newindex+1] or nil
+      end
+      return {
+        format="ligature",
+        baseclasses=baseclasses,
+        coverage=markcoverage,
+      }
+    else
+      for i=1,nofbaserecords do
+        local r={}
+        for j=1,nofclasses do
+          local offset=readushort(f)
+          if offset==0 then
+            r[j]=false
+          else
+            r[j]=baseoffset+offset
+          end
+        end
+        baserecords[i]=r
+      end
+      local baseclasses={} 
+      for i=1,nofclasses do
+        baseclasses[i]={}
+      end
+      for i=1,nofbaserecords do
+        local r=baserecords[i]
+        local b=basecoverage[i]
+        for j=1,nofclasses do
+          baseclasses[j][b]=readanchor(f,r[j],getdelta)
+        end
+      end
+      for index,newindex in next,markcoverage do
+        markcoverage[index]=markclasses[newindex+1] or nil
+      end
+      return {
+        format="base",
+        baseclasses=baseclasses,
+        coverage=markcoverage,
+      }
+    end
+  else
+    report("unsupported subtype %a in",subtype)
+  end
+end
+function gposhandlers.marktobase(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  return handlemark(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+end
+function gposhandlers.marktoligature(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  return handlemark(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,true)
+end
+function gposhandlers.marktomark(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  return handlemark(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+end
+function gposhandlers.context(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  return unchainedcontext(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,"positioning"),"context"
+end
+function gposhandlers.chainedcontext(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  return chainedcontext(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,"positioning"),"chainedcontext"
+end
+function gposhandlers.extension(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  return extension(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,gpostypes,gposhandlers,"positioning")
+end
+do
+  local plugins={}
+  function plugins.size(f,fontdata,tableoffset,feature)
+    if fontdata.designsize then
+    else
+      local function check(offset)
+        setposition(f,offset)
+        local designsize=readushort(f)
+        if designsize>0 then 
+          local fontstyleid=readushort(f)
+          local guimenuid=readushort(f)
+          local minsize=readushort(f)
+          local maxsize=readushort(f)
+          if minsize==0 and maxsize==0 and fontstyleid==0 and guimenuid==0 then
+            minsize=designsize
+            maxsize=designsize
+          end
+          if designsize>=minsize and designsize<=maxsize then
+            return minsize,maxsize,designsize
+          end
+        end
+      end
+      local minsize,maxsize,designsize=check(tableoffset+feature.offset+feature.parameters)
+      if not designsize then
+        minsize,maxsize,designsize=check(tableoffset+feature.parameters)
+        if designsize then
+          report("bad size feature in %a, falling back to wrong offset",fontdata.filename or "?")
+        else
+          report("bad size feature in %a,",fontdata.filename or "?")
+        end
+      end
+      if designsize then
+        fontdata.minsize=minsize
+        fontdata.maxsize=maxsize
+        fontdata.designsize=designsize
+      end
+    end
+  end
+  local function reorderfeatures(fontdata,scripts,features)
+    local scriptlangs={}
+    local featurehash={}
+    local featureorder={}
+    for script,languages in next,scripts do
+      for language,record in next,languages do
+        local hash={}
+        local list=record.featureindices
+        for k=1,#list do
+          local index=list[k]
+          local feature=features[index]
+          local lookups=feature.lookups
+          local tag=feature.tag
+          if tag then
+            hash[tag]=true
+          end
+          if lookups then
+            for i=1,#lookups do
+              local lookup=lookups[i]
+              local o=featureorder[lookup]
+              if o then
+                local okay=true
+                for i=1,#o do
+                  if o[i]==tag then
+                    okay=false
+                    break
+                  end
+                end
+                if okay then
+                  o[#o+1]=tag
+                end
+              else
+                featureorder[lookup]={ tag }
+              end
+              local f=featurehash[lookup]
+              if f then
+                local h=f[tag]
+                if h then
+                  local s=h[script]
+                  if s then
+                    s[language]=true
+                  else
+                    h[script]={ [language]=true }
+                  end
+                else
+                  f[tag]={ [script]={ [language]=true } }
+                end
+              else
+                featurehash[lookup]={ [tag]={ [script]={ [language]=true } } }
+              end
+              local h=scriptlangs[tag]
+              if h then
+                local s=h[script]
+                if s then
+                  s[language]=true
+                else
+                  h[script]={ [language]=true }
+                end
+              else
+                scriptlangs[tag]={ [script]={ [language]=true } }
+              end
+            end
+          end
+        end
+      end
+    end
+    return scriptlangs,featurehash,featureorder
+  end
+  local function readscriplan(f,fontdata,scriptoffset)
+    setposition(f,scriptoffset)
+    local nofscripts=readushort(f)
+    local scripts={}
+    for i=1,nofscripts do
+      scripts[readtag(f)]=scriptoffset+readushort(f)
+    end
+    local languagesystems=setmetatableindex("table")
+    for script,offset in next,scripts do
+      setposition(f,offset)
+      local defaultoffset=readushort(f)
+      local noflanguages=readushort(f)
+      local languages={}
+      if defaultoffset>0 then
+        languages.dflt=languagesystems[offset+defaultoffset]
+      end
+      for i=1,noflanguages do
+        local language=readtag(f)
+        local offset=offset+readushort(f)
+        languages[language]=languagesystems[offset]
+      end
+      scripts[script]=languages
+    end
+    for offset,usedfeatures in next,languagesystems do
+      if offset>0 then
+        setposition(f,offset)
+        local featureindices={}
+        usedfeatures.featureindices=featureindices
+        usedfeatures.lookuporder=readushort(f) 
+        usedfeatures.requiredindex=readushort(f) 
+        local noffeatures=readushort(f)
+        for i=1,noffeatures do
+          featureindices[i]=readushort(f)+1
+        end
+      end
+    end
+    return scripts
+  end
+  local function readfeatures(f,fontdata,featureoffset)
+    setposition(f,featureoffset)
+    local features={}
+    local noffeatures=readushort(f)
+    for i=1,noffeatures do
+      features[i]={
+        tag=readtag(f),
+        offset=readushort(f)
+      }
+    end
+    for i=1,noffeatures do
+      local feature=features[i]
+      local offset=featureoffset+feature.offset
+      setposition(f,offset)
+      local parameters=readushort(f) 
+      local noflookups=readushort(f)
+      if noflookups>0 then
+        local lookups={}
+        feature.lookups=lookups
+        for j=1,noflookups do
+          lookups[j]=readushort(f)+1
+        end
+      end
+      if parameters>0 then
+        feature.parameters=parameters
+        local plugin=plugins[feature.tag]
+        if plugin then
+          plugin(f,fontdata,featureoffset,feature)
+        end
+      end
+    end
+    return features
+  end
+  local function readlookups(f,lookupoffset,lookuptypes,featurehash,featureorder)
+    setposition(f,lookupoffset)
+    local lookups={}
+    local noflookups=readushort(f)
+    for i=1,noflookups do
+      lookups[i]=readushort(f)
+    end
+    for lookupid=1,noflookups do
+      local offset=lookups[lookupid]
+      setposition(f,lookupoffset+offset)
+      local subtables={}
+      local typebits=readushort(f)
+      local flagbits=readushort(f)
+      local lookuptype=lookuptypes[typebits]
+      local lookupflags=lookupflags[flagbits]
+      local nofsubtables=readushort(f)
+      for j=1,nofsubtables do
+        subtables[j]=offset+readushort(f) 
+      end
+      local markclass=bittest(flagbits,0x0010) 
+      if markclass then
+        markclass=readushort(f) 
+      end
+      local markset=rshift(flagbits,8)
+      if markset>0 then
+        markclass=markset 
+      end
+      lookups[lookupid]={
+        type=lookuptype,
+        flags=lookupflags,
+        name=lookupid,
+        subtables=subtables,
+        markclass=markclass,
+        features=featurehash[lookupid],
+        order=featureorder[lookupid],
+      }
+    end
+    return lookups
+  end
+  local f_lookupname=formatters["%s_%s_%s"]
+  local function resolvelookups(f,lookupoffset,fontdata,lookups,lookuptypes,lookuphandlers,what,tableoffset)
+    local sequences=fontdata.sequences  or {}
+    local sublookuplist=fontdata.sublookups or {}
+    fontdata.sequences=sequences
+    fontdata.sublookups=sublookuplist
+    local nofsublookups=#sublookuplist
+    local nofsequences=#sequences 
+    local lastsublookup=nofsublookups
+    local lastsequence=nofsequences
+    local lookupnames=lookupnames[what]
+    local sublookuphash={}
+    local sublookupcheck={}
+    local glyphs=fontdata.glyphs
+    local nofglyphs=fontdata.nofglyphs or #glyphs
+    local noflookups=#lookups
+    local lookupprefix=sub(what,2,2)
+    for lookupid=1,noflookups do
+      local lookup=lookups[lookupid]
+      local lookuptype=lookup.type
+      local subtables=lookup.subtables
+      local features=lookup.features
+      local handler=lookuphandlers[lookuptype]
+      if handler then
+        local nofsubtables=#subtables
+        local order=lookup.order
+        local flags=lookup.flags
+        if flags[1] then flags[1]="mark" end
+        if flags[2] then flags[2]="ligature" end
+        if flags[3] then flags[3]="base" end
+        local markclass=lookup.markclass
+        if nofsubtables>0 then
+          local steps={}
+          local nofsteps=0
+          local oldtype=nil
+          for s=1,nofsubtables do
+            local step,lt=handler(f,fontdata,lookupid,lookupoffset,subtables[s],glyphs,nofglyphs)
+            if lt then
+              lookuptype=lt
+              if oldtype and lt~=oldtype then
+                report("messy %s lookup type %a and %a",what,lookuptype,oldtype)
+              end
+              oldtype=lookuptype
+            end
+            if not step then
+              report("unsupported %s lookup type %a",what,lookuptype)
+            else
+              nofsteps=nofsteps+1
+              steps[nofsteps]=step
+              local rules=step.rules
+              if rules then
+                for i=1,#rules do
+                  local rule=rules[i]
+                  local before=rule.before
+                  local current=rule.current
+                  local after=rule.after
+                  local replacements=rule.replacements
+                  if before then
+                    for i=1,#before do
+                      before[i]=tohash(before[i])
+                    end
+                    rule.before=reversed(before)
+                  end
+                  if current then
+                    if replacements then
+                      local first=current[1]
+                      local hash={}
+                      local repl={}
+                      for i=1,#first do
+                        local c=first[i]
+                        hash[c]=true
+                        repl[c]=replacements[i]
+                      end
+                      rule.current={ hash }
+                      rule.replacements=repl
+                    else
+                      for i=1,#current do
+                        current[i]=tohash(current[i])
+                      end
+                    end
+                  end
+                  if after then
+                    for i=1,#after do
+                      after[i]=tohash(after[i])
+                    end
+                  end
+                end
+              end
+            end
+          end
+          if nofsteps~=nofsubtables then
+            report("bogus subtables removed in %s lookup type %a",what,lookuptype)
+          end
+          lookuptype=lookupnames[lookuptype] or lookuptype
+          if features then
+            nofsequences=nofsequences+1
+            local l={
+              index=nofsequences,
+              name=f_lookupname(lookupprefix,"s",lookupid+lookupidoffset),
+              steps=steps,
+              nofsteps=nofsteps,
+              type=lookuptype,
+              markclass=markclass or nil,
+              flags=flags,
+              order=order,
+              features=features,
+            }
+            sequences[nofsequences]=l
+            lookup.done=l
+          else
+            nofsublookups=nofsublookups+1
+            local l={
+              index=nofsublookups,
+              name=f_lookupname(lookupprefix,"l",lookupid+lookupidoffset),
+              steps=steps,
+              nofsteps=nofsteps,
+              type=lookuptype,
+              markclass=markclass or nil,
+              flags=flags,
+            }
+            sublookuplist[nofsublookups]=l
+            sublookuphash[lookupid]=nofsublookups
+            sublookupcheck[lookupid]=0
+            lookup.done=l
+          end
+        else
+          report("no subtables for lookup %a",lookupid)
+        end
+      else
+        report("no handler for lookup %a with type %a",lookupid,lookuptype)
+      end
+    end
+    local reported={}
+    local function report_issue(i,what,sequence,kind)
+      local name=sequence.name
+      if not reported[name] then
+        report("rule %i in %s lookup %a has %s lookups",i,what,name,kind)
+        reported[name]=true
+      end
+    end
+    for i=lastsequence+1,nofsequences do
+      local sequence=sequences[i]
+      local steps=sequence.steps
+      for i=1,#steps do
+        local step=steps[i]
+        local rules=step.rules
+        if rules then
+          for i=1,#rules do
+            local rule=rules[i]
+            local rlookups=rule.lookups
+            if not rlookups then
+              report_issue(i,what,sequence,"no")
+            elseif not next(rlookups) then
+              report_issue(i,what,sequence,"empty")
+              rule.lookups=nil
+            else
+              local length=#rlookups
+              for index=1,length do
+                local lookuplist=rlookups[index]
+                if lookuplist then
+                  local length=#lookuplist
+                  local found={}
+                  local noffound=0
+                  for index=1,length do
+                    local lookupid=lookuplist[index]
+                    if lookupid then
+                      local h=sublookuphash[lookupid]
+                      if not h then
+                        local lookup=lookups[lookupid]
+                        if lookup then
+                          local d=lookup.done
+                          if d then
+                            nofsublookups=nofsublookups+1
+                            h={
+                              index=nofsublookups,
+                              name=f_lookupname(lookupprefix,"d",lookupid+lookupidoffset),
+                              derived=true,
+                              steps=d.steps,
+                              nofsteps=d.nofsteps,
+                              type=d.lookuptype or "gsub_single",
+                              markclass=d.markclass or nil,
+                              flags=d.flags,
+                            }
+                            sublookuplist[nofsublookups]=copy(h) 
+                            sublookuphash[lookupid]=nofsublookups
+                            sublookupcheck[lookupid]=1
+                            h=nofsublookups
+                          else
+                            report_issue(i,what,sequence,"missing")
+                            rule.lookups=nil
+                            break
+                          end
+                        else
+                          report_issue(i,what,sequence,"bad")
+                          rule.lookups=nil
+                          break
+                        end
+                      else
+                        sublookupcheck[lookupid]=sublookupcheck[lookupid]+1
+                      end
+                      if h then
+                        noffound=noffound+1
+                        found[noffound]=h
+                      end
+                    end
+                  end
+                  rlookups[index]=noffound>0 and found or false
+                else
+                  rlookups[index]=false
+                end
+              end
+            end
+          end
+        end
+      end
+    end
+    for i,n in sortedhash(sublookupcheck) do
+      local l=lookups[i]
+      local t=l.type
+      if n==0 and t~="extension" then
+        local d=l.done
+        report("%s lookup %s of type %a is not used",what,d and d.name or l.name,t)
+      end
+    end
+  end
+  local function loadvariations(f,fontdata,variationsoffset,lookuptypes,featurehash,featureorder)
+    setposition(f,variationsoffset)
+    local version=readulong(f)
+    local nofrecords=readulong(f)
+    local records={}
+    for i=1,nofrecords do
+      records[i]={
+        conditions=readulong(f),
+        substitutions=readulong(f),
+      }
+    end
+    for i=1,nofrecords do
+      local record=records[i]
+      local offset=record.conditions
+      if offset==0 then
+        record.condition=nil
+        record.matchtype="always"
+      else
+        setposition(f,variationsoffset+offset)
+        local nofconditions=readushort(f)
+        local conditions={}
+        for i=1,nofconditions do
+          conditions[i]=variationsoffset+offset+readulong(f)
+        end
+        record.conditions=conditions
+        record.matchtype="condition"
+      end
+    end
+    for i=1,nofrecords do
+      local record=records[i]
+      if record.matchtype=="condition" then
+        local conditions=record.conditions
+        for i=1,#conditions do
+          setposition(f,conditions[i])
+          conditions[i]={
+            format=readushort(f),
+            axis=readushort(f),
+            minvalue=read2dot14(f),
+            maxvalue=read2dot14(f),
+          }
+        end
+      end
+    end
+    for i=1,nofrecords do
+      local record=records[i]
+      local offset=record.substitutions
+      if offset==0 then
+        record.substitutions={}
+      else
+        setposition(f,variationsoffset+offset)
+        local version=readulong(f)
+        local nofsubstitutions=readushort(f)
+        local substitutions={}
+        for i=1,nofsubstitutions do
+          substitutions[readushort(f)]=readulong(f)
+        end
+        for index,alternates in sortedhash(substitutions) do
+          if index==0 then
+            record.substitutions=false
+          else
+            local tableoffset=variationsoffset+offset+alternates
+            setposition(f,tableoffset)
+            local parameters=readulong(f) 
+            local noflookups=readushort(f)
+            local lookups={}
+            for i=1,noflookups do
+              lookups[i]=readushort(f) 
+            end
+            record.substitutions=lookups
+          end
+        end
+      end
+    end
+    setvariabledata(fontdata,"features",records)
+  end
+  local function readscripts(f,fontdata,what,lookuptypes,lookuphandlers,lookupstoo)
+    local tableoffset=gotodatatable(f,fontdata,what,true)
+    if tableoffset then
+      local version=readulong(f)
+      local scriptoffset=tableoffset+readushort(f)
+      local featureoffset=tableoffset+readushort(f)
+      local lookupoffset=tableoffset+readushort(f)
+      local variationsoffset=version>0x00010000 and (tableoffset+readulong(f)) or 0
+      if not scriptoffset then
+        return
+      end
+      local scripts=readscriplan(f,fontdata,scriptoffset)
+      local features=readfeatures(f,fontdata,featureoffset)
+      local scriptlangs,featurehash,featureorder=reorderfeatures(fontdata,scripts,features)
+      if fontdata.features then
+        fontdata.features[what]=scriptlangs
+      else
+        fontdata.features={ [what]=scriptlangs }
+      end
+      if not lookupstoo then
+        return
+      end
+      local lookups=readlookups(f,lookupoffset,lookuptypes,featurehash,featureorder)
+      if lookups then
+        resolvelookups(f,lookupoffset,fontdata,lookups,lookuptypes,lookuphandlers,what,tableoffset)
+      end
+      if variationsoffset>0 then
+        loadvariations(f,fontdata,variationsoffset,lookuptypes,featurehash,featureorder)
+      end
+    end
+  end
+  local function checkkerns(f,fontdata,specification)
+    local datatable=fontdata.tables.kern
+    if not datatable then
+      return 
+    end
+    local features=fontdata.features
+    local gposfeatures=features and features.gpos
+    local name
+    if not gposfeatures or not gposfeatures.kern then
+      name="kern"
+    elseif specification.globalkerns then
+      name="globalkern"
+    else
+      report("ignoring global kern table using gpos kern feature")
+      return
+    end
+    setposition(f,datatable.offset)
+    local version=readushort(f)
+    local noftables=readushort(f)
+    if noftables>1 then
+      report("adding global kern table as gpos feature %a",name)
+      local kerns=setmetatableindex("table")
+      for i=1,noftables do
+        local version=readushort(f)
+        local length=readushort(f)
+        local coverage=readushort(f)
+        local format=bit32.rshift(coverage,8) 
+        if format==0 then
+          local nofpairs=readushort(f)
+          local searchrange=readushort(f)
+          local entryselector=readushort(f)
+          local rangeshift=readushort(f)
+          for i=1,nofpairs do
+            kerns[readushort(f)][readushort(f)]=readfword(f)
+          end
+        elseif format==2 then
+        else
+        end
+      end
+      local feature={ dflt={ dflt=true } }
+      if not features then
+        fontdata.features={ gpos={ [name]=feature } }
+      elseif not gposfeatures then
+        fontdata.features.gpos={ [name]=feature }
+      else
+        gposfeatures[name]=feature
+      end
+      local sequences=fontdata.sequences
+      if not sequences then
+        sequences={}
+        fontdata.sequences=sequences
+      end
+      local nofsequences=#sequences+1
+      sequences[nofsequences]={
+        index=nofsequences,
+        name=name,
+        steps={
+          {
+            coverage=kerns,
+            format="kern",
+          },
+        },
+        nofsteps=1,
+        type="gpos_pair",
+        flags={ false,false,false,false },
+        order={ name },
+        features={ [name]=feature },
+      }
+    else
+      report("ignoring empty kern table of feature %a",name)
+    end
+  end
+  function readers.gsub(f,fontdata,specification)
+    if specification.details then
+      readscripts(f,fontdata,"gsub",gsubtypes,gsubhandlers,specification.lookups)
+    end
+  end
+  function readers.gpos(f,fontdata,specification)
+    if specification.details then
+      readscripts(f,fontdata,"gpos",gpostypes,gposhandlers,specification.lookups)
+      if specification.lookups then
+        checkkerns(f,fontdata,specification)
+      end
+    end
+  end
+end
+function readers.gdef(f,fontdata,specification)
+  if not specification.glyphs then
+    return
+  end
+  local datatable=fontdata.tables.gdef
+  if datatable then
+    local tableoffset=datatable.offset
+    setposition(f,tableoffset)
+    local version=readulong(f)
+    local classoffset=readushort(f)
+    local attachmentoffset=readushort(f) 
+    local ligaturecarets=readushort(f) 
+    local markclassoffset=readushort(f)
+    local marksetsoffset=version>=0x00010002 and readushort(f) or 0
+    local varsetsoffset=version>=0x00010003 and readulong(f) or 0
+    local glyphs=fontdata.glyphs
+    local marks={}
+    local markclasses=setmetatableindex("table")
+    local marksets=setmetatableindex("table")
+    fontdata.marks=marks
+    fontdata.markclasses=markclasses
+    fontdata.marksets=marksets
+    if classoffset~=0 then
+      setposition(f,tableoffset+classoffset)
+      local classformat=readushort(f)
+      if classformat==1 then
+        local firstindex=readushort(f)
+        local lastindex=firstindex+readushort(f)-1
+        for index=firstindex,lastindex do
+          local class=classes[readushort(f)]
+          if class=="mark" then
+            marks[index]=true
+          end
+          glyphs[index].class=class
+        end
+      elseif classformat==2 then
+        local nofranges=readushort(f)
+        for i=1,nofranges do
+          local firstindex=readushort(f)
+          local lastindex=readushort(f)
+          local class=classes[readushort(f)]
+          if class then
+            for index=firstindex,lastindex do
+              glyphs[index].class=class
+              if class=="mark" then
+                marks[index]=true
+              end
+            end
+          end
+        end
+      end
+    end
+    if markclassoffset~=0 then
+      setposition(f,tableoffset+markclassoffset)
+      local classformat=readushort(f)
+      if classformat==1 then
+        local firstindex=readushort(f)
+        local lastindex=firstindex+readushort(f)-1
+        for index=firstindex,lastindex do
+          markclasses[readushort(f)][index]=true
+        end
+      elseif classformat==2 then
+        local nofranges=readushort(f)
+        for i=1,nofranges do
+          local firstindex=readushort(f)
+          local lastindex=readushort(f)
+          local class=markclasses[readushort(f)]
+          for index=firstindex,lastindex do
+            class[index]=true
+          end
+        end
+      end
+    end
+    if marksetsoffset~=0 then
+      marksetsoffset=tableoffset+marksetsoffset
+      setposition(f,marksetsoffset)
+      local format=readushort(f)
+      if format==1 then
+        local nofsets=readushort(f)
+        local sets={}
+        for i=1,nofsets do
+          sets[i]=readulong(f)
+        end
+        for i=1,nofsets do
+          local offset=sets[i]
+          if offset~=0 then
+            marksets[i]=readcoverage(f,marksetsoffset+offset)
+          end
+        end
+      end
+    end
+    local factors=specification.factors
+    if (specification.variable or factors) and varsetsoffset~=0 then
+      local regions,deltas=readvariationdata(f,tableoffset+varsetsoffset,factors)
+      if factors then
+        fontdata.temporary.getdelta=function(outer,inner)
+          local delta=deltas[outer+1]
+          if delta then
+            local d=delta.deltas[inner+1]
+            if d then
+              local scales=delta.scales
+              local dd=0
+              for i=1,#scales do
+                local di=d[i]
+                if di then
+                  dd=dd+scales[i]*di
+                else
+                  break
+                end
+              end
+              return round(dd)
+            end
+          end
+          return 0
+        end
+      end
+    end
+  end
+end
+local function readmathvalue(f)
+  local v=readshort(f)
+  skipshort(f,1) 
+  return v
+end
+local function readmathconstants(f,fontdata,offset)
+  setposition(f,offset)
+  fontdata.mathconstants={
+    ScriptPercentScaleDown=readshort(f),
+    ScriptScriptPercentScaleDown=readshort(f),
+    DelimitedSubFormulaMinHeight=readushort(f),
+    DisplayOperatorMinHeight=readushort(f),
+    MathLeading=readmathvalue(f),
+    AxisHeight=readmathvalue(f),
+    AccentBaseHeight=readmathvalue(f),
+    FlattenedAccentBaseHeight=readmathvalue(f),
+    SubscriptShiftDown=readmathvalue(f),
+    SubscriptTopMax=readmathvalue(f),
+    SubscriptBaselineDropMin=readmathvalue(f),
+    SuperscriptShiftUp=readmathvalue(f),
+    SuperscriptShiftUpCramped=readmathvalue(f),
+    SuperscriptBottomMin=readmathvalue(f),
+    SuperscriptBaselineDropMax=readmathvalue(f),
+    SubSuperscriptGapMin=readmathvalue(f),
+    SuperscriptBottomMaxWithSubscript=readmathvalue(f),
+    SpaceAfterScript=readmathvalue(f),
+    UpperLimitGapMin=readmathvalue(f),
+    UpperLimitBaselineRiseMin=readmathvalue(f),
+    LowerLimitGapMin=readmathvalue(f),
+    LowerLimitBaselineDropMin=readmathvalue(f),
+    StackTopShiftUp=readmathvalue(f),
+    StackTopDisplayStyleShiftUp=readmathvalue(f),
+    StackBottomShiftDown=readmathvalue(f),
+    StackBottomDisplayStyleShiftDown=readmathvalue(f),
+    StackGapMin=readmathvalue(f),
+    StackDisplayStyleGapMin=readmathvalue(f),
+    StretchStackTopShiftUp=readmathvalue(f),
+    StretchStackBottomShiftDown=readmathvalue(f),
+    StretchStackGapAboveMin=readmathvalue(f),
+    StretchStackGapBelowMin=readmathvalue(f),
+    FractionNumeratorShiftUp=readmathvalue(f),
+    FractionNumeratorDisplayStyleShiftUp=readmathvalue(f),
+    FractionDenominatorShiftDown=readmathvalue(f),
+    FractionDenominatorDisplayStyleShiftDown=readmathvalue(f),
+    FractionNumeratorGapMin=readmathvalue(f),
+    FractionNumeratorDisplayStyleGapMin=readmathvalue(f),
+    FractionRuleThickness=readmathvalue(f),
+    FractionDenominatorGapMin=readmathvalue(f),
+    FractionDenominatorDisplayStyleGapMin=readmathvalue(f),
+    SkewedFractionHorizontalGap=readmathvalue(f),
+    SkewedFractionVerticalGap=readmathvalue(f),
+    OverbarVerticalGap=readmathvalue(f),
+    OverbarRuleThickness=readmathvalue(f),
+    OverbarExtraAscender=readmathvalue(f),
+    UnderbarVerticalGap=readmathvalue(f),
+    UnderbarRuleThickness=readmathvalue(f),
+    UnderbarExtraDescender=readmathvalue(f),
+    RadicalVerticalGap=readmathvalue(f),
+    RadicalDisplayStyleVerticalGap=readmathvalue(f),
+    RadicalRuleThickness=readmathvalue(f),
+    RadicalExtraAscender=readmathvalue(f),
+    RadicalKernBeforeDegree=readmathvalue(f),
+    RadicalKernAfterDegree=readmathvalue(f),
+    RadicalDegreeBottomRaisePercent=readshort(f),
+  }
+end
+local function readmathglyphinfo(f,fontdata,offset)
+  setposition(f,offset)
+  local italics=readushort(f)
+  local accents=readushort(f)
+  local extensions=readushort(f)
+  local kerns=readushort(f)
+  local glyphs=fontdata.glyphs
+  if italics~=0 then
+    setposition(f,offset+italics)
+    local coverage=readushort(f)
+    local nofglyphs=readushort(f)
+    coverage=readcoverage(f,offset+italics+coverage,true)
+    setposition(f,offset+italics+4)
+    for i=1,nofglyphs do
+      local italic=readmathvalue(f)
+      if italic~=0 then
+        local glyph=glyphs[coverage[i]]
+        local math=glyph.math
+        if not math then
+          glyph.math={ italic=italic }
+        else
+          math.italic=italic
+        end
+      end
+    end
+    fontdata.hasitalics=true
+  end
+  if accents~=0 then
+    setposition(f,offset+accents)
+    local coverage=readushort(f)
+    local nofglyphs=readushort(f)
+    coverage=readcoverage(f,offset+accents+coverage,true)
+    setposition(f,offset+accents+4)
+    for i=1,nofglyphs do
+      local accent=readmathvalue(f)
+      if accent~=0 then
+        local glyph=glyphs[coverage[i]]
+        local math=glyph.math
+        if not math then
+          glyph.math={ accent=accent }
+        else
+          math.accent=accent
+        end
+      end
+    end
+  end
+  if extensions~=0 then
+    setposition(f,offset+extensions)
+  end
+  if kerns~=0 then
+    local kernoffset=offset+kerns
+    setposition(f,kernoffset)
+    local coverage=readushort(f)
+    local nofglyphs=readushort(f)
+    if nofglyphs>0 then
+      local function get(offset)
+        setposition(f,kernoffset+offset)
+        local n=readushort(f)
+        if n==0 then
+          local k=readmathvalue(f)
+          if k==0 then
+          else
+            return { { kern=k } }
+          end
+        else
+          local l={}
+          for i=1,n do
+            l[i]={ height=readmathvalue(f) }
+          end
+          for i=1,n do
+            l[i].kern=readmathvalue(f)
+          end
+          l[n+1]={ kern=readmathvalue(f) }
+          return l
+        end
+      end
+      local kernsets={}
+      for i=1,nofglyphs do
+        local topright=readushort(f)
+        local topleft=readushort(f)
+        local bottomright=readushort(f)
+        local bottomleft=readushort(f)
+        kernsets[i]={
+          topright=topright~=0 and topright  or nil,
+          topleft=topleft~=0 and topleft   or nil,
+          bottomright=bottomright~=0 and bottomright or nil,
+          bottomleft=bottomleft~=0 and bottomleft or nil,
+        }
+      end
+      coverage=readcoverage(f,kernoffset+coverage,true)
+      for i=1,nofglyphs do
+        local kernset=kernsets[i]
+        if next(kernset) then
+          local k=kernset.topright  if k then kernset.topright=get(k) end
+          local k=kernset.topleft   if k then kernset.topleft=get(k) end
+          local k=kernset.bottomright if k then kernset.bottomright=get(k) end
+          local k=kernset.bottomleft if k then kernset.bottomleft=get(k) end
+          if next(kernset) then
+            local glyph=glyphs[coverage[i]]
+            local math=glyph.math
+            if math then
+              math.kerns=kernset
+            else
+              glyph.math={ kerns=kernset }
+            end
+          end
+        end
+      end
+    end
+  end
+end
+local function readmathvariants(f,fontdata,offset)
+  setposition(f,offset)
+  local glyphs=fontdata.glyphs
+  local minoverlap=readushort(f)
+  local vcoverage=readushort(f)
+  local hcoverage=readushort(f)
+  local vnofglyphs=readushort(f)
+  local hnofglyphs=readushort(f)
+  local vconstruction={}
+  local hconstruction={}
+  for i=1,vnofglyphs do
+    vconstruction[i]=readushort(f)
+  end
+  for i=1,hnofglyphs do
+    hconstruction[i]=readushort(f)
+  end
+  fontdata.mathconstants.MinConnectorOverlap=minoverlap
+  local function get(offset,coverage,nofglyphs,construction,kvariants,kparts,kitalic)
+    if coverage~=0 and nofglyphs>0 then
+      local coverage=readcoverage(f,offset+coverage,true)
+      for i=1,nofglyphs do
+        local c=construction[i]
+        if c~=0 then
+          local index=coverage[i]
+          local glyph=glyphs[index]
+          local math=glyph.math
+          setposition(f,offset+c)
+          local assembly=readushort(f)
+          local nofvariants=readushort(f)
+          if nofvariants>0 then
+            local variants,v=nil,0
+            for i=1,nofvariants do
+              local variant=readushort(f)
+              if variant==index then
+              elseif variants then
+                v=v+1
+                variants[v]=variant
+              else
+                v=1
+                variants={ variant }
+              end
+              skipshort(f)
+            end
+            if not variants then
+            elseif not math then
+              math={ [kvariants]=variants }
+              glyph.math=math
+            else
+              math[kvariants]=variants
+            end
+          end
+          if assembly~=0 then
+            setposition(f,offset+c+assembly)
+            local italic=readmathvalue(f)
+            local nofparts=readushort(f)
+            local parts={}
+            for i=1,nofparts do
+              local p={
+                glyph=readushort(f),
+                start=readushort(f),
+                ["end"]=readushort(f),
+                advance=readushort(f),
+              }
+              local flags=readushort(f)
+              if bittest(flags,0x0001) then
+                p.extender=1 
+              end
+              parts[i]=p
+            end
+            if not math then
+              math={
+                [kparts]=parts
+              }
+              glyph.math=math
+            else
+              math[kparts]=parts
+            end
+            if italic and italic~=0 then
+              math[kitalic]=italic
+            end
+          end
+        end
+      end
+    end
+  end
+  get(offset,vcoverage,vnofglyphs,vconstruction,"vvariants","vparts","vitalic")
+  get(offset,hcoverage,hnofglyphs,hconstruction,"hvariants","hparts","hitalic")
+end
+function readers.math(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"math",specification.glyphs)
+  if tableoffset then
+    local version=readulong(f)
+    local constants=readushort(f)
+    local glyphinfo=readushort(f)
+    local variants=readushort(f)
+    if constants==0 then
+      report("the math table of %a has no constants",fontdata.filename)
+    else
+      readmathconstants(f,fontdata,tableoffset+constants)
+    end
+    if glyphinfo~=0 then
+      readmathglyphinfo(f,fontdata,tableoffset+glyphinfo)
+    end
+    if variants~=0 then
+      readmathvariants(f,fontdata,tableoffset+variants)
+    end
+  end
+end
+function readers.colr(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"colr",specification.glyphs)
+  if tableoffset then
+    local version=readushort(f)
+    if version~=0 then
+      report("table version %a of %a is not supported (yet), maybe font %s is bad",version,"colr",fontdata.filename)
+      return
+    end
+    if not fontdata.tables.cpal then
+      report("color table %a in font %a has no mandate %a table","colr",fontdata.filename,"cpal")
+      fontdata.colorpalettes={}
+    end
+    local glyphs=fontdata.glyphs
+    local nofglyphs=readushort(f)
+    local baseoffset=readulong(f)
+    local layeroffset=readulong(f)
+    local noflayers=readushort(f)
+    local layerrecords={}
+    local maxclass=0
+    setposition(f,tableoffset+layeroffset)
+    for i=1,noflayers do
+      local slot=readushort(f)
+      local class=readushort(f)
+      if class<0xFFFF then
+        class=class+1
+        if class>maxclass then
+          maxclass=class
+        end
+      end
+      layerrecords[i]={
+        slot=slot,
+        class=class,
+      }
+    end
+    fontdata.maxcolorclass=maxclass
+    setposition(f,tableoffset+baseoffset)
+    for i=0,nofglyphs-1 do
+      local glyphindex=readushort(f)
+      local firstlayer=readushort(f)
+      local noflayers=readushort(f)
+      local t={}
+      for i=1,noflayers do
+        t[i]=layerrecords[firstlayer+i]
+      end
+      glyphs[glyphindex].colors=t
+    end
+  end
+  fontdata.hascolor=true
+end
+function readers.cpal(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"cpal",specification.glyphs)
+  if tableoffset then
+    local version=readushort(f)
+    local nofpaletteentries=readushort(f)
+    local nofpalettes=readushort(f)
+    local nofcolorrecords=readushort(f)
+    local firstcoloroffset=readulong(f)
+    local colorrecords={}
+    local palettes={}
+    for i=1,nofpalettes do
+      palettes[i]=readushort(f)
+    end
+    if version==1 then
+      local palettettypesoffset=readulong(f)
+      local palettelabelsoffset=readulong(f)
+      local paletteentryoffset=readulong(f)
+    end
+    setposition(f,tableoffset+firstcoloroffset)
+    for i=1,nofcolorrecords do
+      local b,g,r,a=readbytes(f,4)
+      colorrecords[i]={
+        r,g,b,a~=255 and a or nil,
+      }
+    end
+    for i=1,nofpalettes do
+      local p={}
+      local o=palettes[i]
+      for j=1,nofpaletteentries do
+        p[j]=colorrecords[o+j]
+      end
+      palettes[i]=p
+    end
+    fontdata.colorpalettes=palettes
+  end
+end
+function readers.svg(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"svg",specification.glyphs)
+  if tableoffset then
+    local version=readushort(f)
+    local glyphs=fontdata.glyphs
+    local indexoffset=tableoffset+readulong(f)
+    local reserved=readulong(f)
+    setposition(f,indexoffset)
+    local nofentries=readushort(f)
+    local entries={}
+    for i=1,nofentries do
+      entries[i]={
+        first=readushort(f),
+        last=readushort(f),
+        offset=indexoffset+readulong(f),
+        length=readulong(f),
+      }
+    end
+    for i=1,nofentries do
+      local entry=entries[i]
+      setposition(f,entry.offset)
+      entries[i]={
+        first=entry.first,
+        last=entry.last,
+        data=readstring(f,entry.length)
+      }
+    end
+    fontdata.svgshapes=entries
+  end
+  fontdata.hascolor=true
+end
+function readers.sbix(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"sbix",specification.glyphs)
+  if tableoffset then
+    local version=readushort(f)
+    local flags=readushort(f)
+    local nofstrikes=readulong(f)
+    local strikes={}
+    local nofglyphs=fontdata.nofglyphs
+    for i=1,nofstrikes do
+      strikes[i]=readulong(f)
+    end
+      local shapes={}
+      local done=0
+      for i=1,nofstrikes do
+        local strikeoffset=strikes[i]+tableoffset
+        setposition(f,strikeoffset)
+        strikes[i]={
+          ppem=readushort(f),
+          ppi=readushort(f),
+          offset=strikeoffset
+        }
+      end
+      sort(strikes,function(a,b)
+        if b.ppem==a.ppem then
+          return b.ppi<a.ppi
+        else
+          return b.ppem<a.ppem
+        end
+      end)
+      local glyphs={}
+      for i=1,nofstrikes do
+        local strike=strikes[i]
+        local strikeppem=strike.ppem
+        local strikeppi=strike.ppi
+        local strikeoffset=strike.offset
+        setposition(f,strikeoffset)
+        for i=0,nofglyphs do
+          glyphs[i]=readulong(f)
+        end
+        local glyphoffset=glyphs[0]
+        for i=0,nofglyphs-1 do
+          local nextoffset=glyphs[i+1]
+          if not shapes[i] then
+            local datasize=nextoffset-glyphoffset
+            if datasize>0 then
+              setposition(f,strikeoffset+glyphoffset)
+              shapes[i]={
+                x=readshort(f),
+                y=readshort(f),
+                tag=readtag(f),
+                data=readstring(f,datasize-8),
+                ppem=strikeppem,
+                ppi=strikeppi,
+              }
+              done=done+1
+              if done==nofglyphs then
+                break
+              end
+            end
+          end
+          glyphoffset=nextoffset
+        end
+      end
+      fontdata.sbixshapes=shapes
+  end
+end
+function readers.stat(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"stat",true) 
+  if tableoffset then
+    local extras=fontdata.extras
+    local version=readulong(f) 
+    local axissize=readushort(f)
+    local nofaxis=readushort(f)
+    local axisoffset=readulong(f)
+    local nofvalues=readushort(f)
+    local valuesoffset=readulong(f)
+    local fallbackname=extras[readushort(f)] 
+    local axis={}
+    local values={}
+    setposition(f,tableoffset+axisoffset)
+    for i=1,nofaxis do
+      axis[i]={
+        tag=readtag(f),
+        name=lower(extras[readushort(f)]),
+        ordering=readushort(f),
+        variants={}
+      }
+    end
+    setposition(f,tableoffset+valuesoffset)
+    for i=1,nofvalues do
+      values[i]=readushort(f)
+    end
+    for i=1,nofvalues do
+      setposition(f,tableoffset+valuesoffset+values[i])
+      local format=readushort(f)
+      local index=readushort(f)+1
+      local flags=readushort(f)
+      local name=lower(extras[readushort(f)])
+      local value=readfixed(f)
+      local variant
+      if format==1 then
+        variant={
+          flags=flags,
+          name=name,
+          value=value,
+        }
+      elseif format==2 then
+        variant={
+          flags=flags,
+          name=name,
+          value=value,
+          minimum=readfixed(f),
+          maximum=readfixed(f),
+        }
+      elseif format==3 then
+        variant={
+          flags=flags,
+          name=name,
+          value=value,
+          link=readfixed(f),
+        }
+      end
+      insert(axis[index].variants,variant)
+    end
+    sort(axis,function(a,b)
+      return a.ordering<b.ordering
+    end)
+    for i=1,#axis do
+      local a=axis[i]
+      sort(a.variants,function(a,b)
+        return a.name<b.name
+      end)
+      a.ordering=nil
+    end
+    setvariabledata(fontdata,"designaxis",axis)
+    setvariabledata(fontdata,"fallbackname",fallbackname)
+  end
+end
+function readers.avar(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"avar",true) 
+  if tableoffset then
+    local function collect()
+      local nofvalues=readushort(f)
+      local values={}
+      local lastfrom=false
+      local lastto=false
+      for i=1,nofvalues do
+        local f,t=read2dot14(f),read2dot14(f)
+        if lastfrom and f<=lastfrom then
+        elseif lastto and t>=lastto then
+        else
+          values[#values+1]={ f,t }
+          lastfrom,lastto=f,t
+        end
+      end
+      nofvalues=#values
+      if nofvalues>2 then
+        local some=values[1]
+        if some[1]==-1 and some[2]==-1 then
+          some=values[nofvalues]
+          if some[1]==1 and some[2]==1 then
+            for i=2,nofvalues-1 do
+              some=values[i]
+              if some[1]==0 and some[2]==0 then
+                return values
+              end
+            end
+          end
+        end
+      end
+      return false
+    end
+    local majorversion=readushort(f) 
+    local minorversion=readushort(f) 
+    local reserved=readushort(f)
+    local nofaxis=readushort(f)
+    local segments={}
+    for i=1,nofaxis do
+      segments[i]=collect()
+    end
+    setvariabledata(fontdata,"segments",segments)
+  end
+end
+function readers.fvar(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"fvar",true) 
+  if tableoffset then
+    local version=readulong(f) 
+    local offsettoaxis=tableoffset+readushort(f)
+    local reserved=skipshort(f)
+    local nofaxis=readushort(f)
+    local sizeofaxis=readushort(f)
+    local nofinstances=readushort(f)
+    local sizeofinstances=readushort(f)
+    local extras=fontdata.extras
+    local axis={}
+    local instances={}
+    setposition(f,offsettoaxis)
+    for i=1,nofaxis do
+      axis[i]={
+        tag=readtag(f),
+        minimum=readfixed(f),
+        default=readfixed(f),
+        maximum=readfixed(f),
+        flags=readushort(f),
+        name=lower(extras[readushort(f)] or "bad name"),
+      }
+      local n=sizeofaxis-20
+      if n>0 then
+        skipbytes(f,n)
+      elseif n<0 then
+      end
+    end
+    local nofbytes=2+2+2+nofaxis*4
+    local readpsname=nofbytes<=sizeofinstances
+    local skippable=sizeofinstances-nofbytes
+    for i=1,nofinstances do
+      local subfamid=readushort(f)
+      local flags=readushort(f) 
+      local values={}
+      for i=1,nofaxis do
+        values[i]={
+          axis=axis[i].tag,
+          value=readfixed(f),
+        }
+      end
+      local psnameid=readpsname and readushort(f) or 0xFFFF
+      if subfamid==2 or subfamid==17 then
+      elseif subfamid==0xFFFF then
+        subfamid=nil
+      elseif subfamid<=256 or subfamid>=32768 then
+        subfamid=nil 
+      end
+      if psnameid==6 then
+      elseif psnameid==0xFFFF then
+        psnameid=nil
+      elseif psnameid<=256 or psnameid>=32768 then
+        psnameid=nil 
+      end
+      instances[i]={
+        subfamily=extras[subfamid],
+        psname=psnameid and extras[psnameid] or nil,
+        values=values,
+      }
+      if skippable>0 then
+        skipbytes(f,skippable)
+      end
+    end
+    setvariabledata(fontdata,"axis",axis)
+    setvariabledata(fontdata,"instances",instances)
+  end
+end
+function readers.hvar(f,fontdata,specification)
+  local factors=specification.factors
+  if not factors then
+    return
+  end
+  local tableoffset=gotodatatable(f,fontdata,"hvar",specification.variable)
+  if not tableoffset then
+    return
+  end
+  local version=readulong(f) 
+  local variationoffset=tableoffset+readulong(f) 
+  local advanceoffset=tableoffset+readulong(f)
+  local lsboffset=tableoffset+readulong(f)
+  local rsboffset=tableoffset+readulong(f)
+  local regions={}
+  local variations={}
+  local innerindex={} 
+  local outerindex={} 
+  if variationoffset>0 then
+    regions,deltas=readvariationdata(f,variationoffset,factors)
+  end
+  if not regions then
+    return
+  end
+  if advanceoffset>0 then
+    setposition(f,advanceoffset)
+    local format=readushort(f) 
+    local mapcount=readushort(f)
+    local entrysize=rshift(band(format,0x0030),4)+1
+    local nofinnerbits=band(format,0x000F)+1 
+    local innermask=lshift(1,nofinnerbits)-1
+    local readcardinal=read_cardinal[entrysize] 
+    for i=0,mapcount-1 do
+      local mapdata=readcardinal(f)
+      outerindex[i]=rshift(mapdata,nofinnerbits)
+      innerindex[i]=band(mapdata,innermask)
+    end
+    setvariabledata(fontdata,"hvarwidths",true)
+    local glyphs=fontdata.glyphs
+    for i=0,fontdata.nofglyphs-1 do
+      local glyph=glyphs[i]
+      local width=glyph.width
+      if width then
+        local outer=outerindex[i] or 0
+        local inner=innerindex[i] or i
+        if outer and inner then 
+          local delta=deltas[outer+1]
+          if delta then
+            local d=delta.deltas[inner+1]
+            if d then
+              local scales=delta.scales
+              local deltaw=0
+              for i=1,#scales do
+                local di=d[i]
+                if di then
+                  deltaw=deltaw+scales[i]*di
+                else
+                  break 
+                end
+              end
+              glyph.width=width+round(deltaw)
+            end
+          end
+        end
+      end
+    end
+  end
+end
+function readers.vvar(f,fontdata,specification)
+  if not specification.variable then
+    return
+  end
+end
+function readers.mvar(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"mvar",specification.variable)
+  if tableoffset then
+    local version=readulong(f) 
+    local reserved=skipshort(f,1)
+    local recordsize=readushort(f)
+    local nofrecords=readushort(f)
+    local offsettostore=tableoffset+readushort(f)
+    local dimensions={}
+    local factors=specification.factors
+    if factors then
+      local regions,deltas=readvariationdata(f,offsettostore,factors)
+      for i=1,nofrecords do
+        local tag=readtag(f)
+        local var=variabletags[tag]
+        if var then
+          local outer=readushort(f)
+          local inner=readushort(f)
+          local delta=deltas[outer+1]
+          if delta then
+            local d=delta.deltas[inner+1]
+            if d then
+              local scales=delta.scales
+              local dd=0
+              for i=1,#scales do
+                dd=dd+scales[i]*d[i]
+              end
+              var(fontdata,round(dd))
+            end
+          end
+        else
+          skipshort(f,2)
+        end
+        if recordsize>8 then 
+          skipbytes(recordsize-8)
+        end
+      end
+    end
+  end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-oup']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local next,type=next,type
+local P,R,S=lpeg.P,lpeg.R,lpeg.S
+local lpegmatch=lpeg.match
+local insert,remove,copy,unpack=table.insert,table.remove,table.copy,table.unpack
+local formatters=string.formatters
+local sortedkeys=table.sortedkeys
+local sortedhash=table.sortedhash
+local tohash=table.tohash
+local setmetatableindex=table.setmetatableindex
+local report=logs.reporter("otf reader")
+local trace_markwidth=false trackers.register("otf.markwidth",function(v) trace_markwidth=v end)
+local readers=fonts.handlers.otf.readers
+local privateoffset=fonts.constructors and fonts.constructors.privateoffset or 0xF0000 
+local f_private=formatters["P%05X"]
+local f_unicode=formatters["U%05X"]
+local f_index=formatters["I%05X"]
+local f_character_y=formatters["%C"]
+local f_character_n=formatters["[ %C ]"]
+local check_duplicates=true 
+local check_soft_hyphen=true 
+directives.register("otf.checksofthyphen",function(v)
+  check_soft_hyphen=v
+end)
+local function replaced(list,index,replacement)
+  if type(list)=="number" then
+    return replacement
+  elseif type(replacement)=="table" then
+    local t={}
+    local n=index-1
+    for i=1,n do
+      t[i]=list[i]
+    end
+    for i=1,#replacement do
+      n=n+1
+      t[n]=replacement[i]
+    end
+    for i=index+1,#list do
+      n=n+1
+      t[n]=list[i]
+    end
+  else
+    list[index]=replacement
+    return list
+  end
+end
+local function unifyresources(fontdata,indices)
+  local descriptions=fontdata.descriptions
+  local resources=fontdata.resources
+  if not descriptions or not resources then
+    return
+  end
+  local variants=fontdata.resources.variants
+  if variants then
+    for selector,unicodes in next,variants do
+      for unicode,index in next,unicodes do
+        unicodes[unicode]=indices[index]
+      end
+    end
+  end
+  local function remark(marks)
+    if marks then
+      local newmarks={}
+      for k,v in next,marks do
+        local u=indices[k]
+        if u then
+          newmarks[u]=v
+        else
+          report("discarding mark %i",k)
+        end
+      end
+      return newmarks
+    end
+  end
+  local marks=resources.marks
+  if marks then
+    resources.marks=remark(marks)
+  end
+  local markclasses=resources.markclasses
+  if markclasses then
+    for class,marks in next,markclasses do
+      markclasses[class]=remark(marks)
+    end
+  end
+  local marksets=resources.marksets
+  if marksets then
+    for class,marks in next,marksets do
+      marksets[class]=remark(marks)
+    end
+  end
+  local done={}
+  local duplicates=check_duplicates and resources.duplicates
+  if duplicates and not next(duplicates) then
+    duplicates=false
+  end
+  local function recover(cover) 
+    for i=1,#cover do
+      local c=cover[i]
+      if not done[c] then
+        local t={}
+        for k,v in next,c do
+          t[indices[k]]=v
+        end
+        cover[i]=t
+        done[c]=d
+      end
+    end
+  end
+  local function recursed(c) 
+    local t={}
+    for g,d in next,c do
+      if type(d)=="table" then
+        t[indices[g]]=recursed(d)
+      else
+        t[g]=indices[d] 
+      end
+    end
+    return t
+  end
+  local function unifythem(sequences)
+    if not sequences then
+      return
+    end
+    for i=1,#sequences do
+      local sequence=sequences[i]
+      local kind=sequence.type
+      local steps=sequence.steps
+      local features=sequence.features
+      if steps then
+        for i=1,#steps do
+          local step=steps[i]
+          if kind=="gsub_single" then
+            local c=step.coverage
+            if c then
+              local t1=done[c]
+              if not t1 then
+                t1={}
+                if duplicates then
+                  for g1,d1 in next,c do
+                    local ug1=indices[g1]
+                    local ud1=indices[d1]
+                    t1[ug1]=ud1
+                    local dg1=duplicates[ug1]
+                    if dg1 then
+                      for u in next,dg1 do
+                        t1[u]=ud1
+                      end
+                    end
+                  end
+                else
+                  for g1,d1 in next,c do
+                    t1[indices[g1]]=indices[d1]
+                  end
+                end
+                done[c]=t1
+              end
+              step.coverage=t1
+            end
+          elseif kind=="gpos_pair" then
+            local c=step.coverage
+            if c then
+              local t1=done[c]
+              if not t1 then
+                t1={}
+                for g1,d1 in next,c do
+                  local t2=done[d1]
+                  if not t2 then
+                    t2={}
+                    for g2,d2 in next,d1 do
+                      t2[indices[g2]]=d2
+                    end
+                    done[d1]=t2
+                  end
+                  t1[indices[g1]]=t2
+                end
+                done[c]=t1
+              end
+              step.coverage=t1
+            end
+          elseif kind=="gsub_ligature" then
+            local c=step.coverage
+            if c then
+              step.coverage=recursed(c)
+            end
+          elseif kind=="gsub_alternate" or kind=="gsub_multiple" then
+            local c=step.coverage
+            if c then
+              local t1=done[c]
+              if not t1 then
+                t1={}
+                if duplicates then
+                  for g1,d1 in next,c do
+                    for i=1,#d1 do
+                      d1[i]=indices[d1[i]]
+                    end
+                    local ug1=indices[g1]
+                    t1[ug1]=d1
+                    local dg1=duplicates[ug1]
+                    if dg1 then
+                      for u in next,dg1 do
+                        t1[u]=copy(d1)
+                      end
+                    end
+                  end
+                else
+                  for g1,d1 in next,c do
+                    for i=1,#d1 do
+                      d1[i]=indices[d1[i]]
+                    end
+                    t1[indices[g1]]=d1
+                  end
+                end
+                done[c]=t1
+              end
+              step.coverage=t1
+            end
+          elseif kind=="gpos_mark2base" or kind=="gpos_mark2mark" or kind=="gpos_mark2ligature" then
+            local c=step.coverage
+            if c then
+              local t1=done[c]
+              if not t1 then
+                t1={}
+                for g1,d1 in next,c do
+                  t1[indices[g1]]=d1
+                end
+                done[c]=t1
+              end
+              step.coverage=t1
+            end
+            local c=step.baseclasses
+            if c then
+              local t1=done[c]
+              if not t1 then
+                for g1,d1 in next,c do
+                  local t2=done[d1]
+                  if not t2 then
+                    t2={}
+                    for g2,d2 in next,d1 do
+                      t2[indices[g2]]=d2
+                    end
+                    done[d1]=t2
+                  end
+                  c[g1]=t2
+                end
+                done[c]=c
+              end
+            end
+          elseif kind=="gpos_single" then
+            local c=step.coverage
+            if c then
+              local t1=done[c]
+              if not t1 then
+                t1={}
+                if duplicates then
+                  for g1,d1 in next,c do
+                    local ug1=indices[g1]
+                    t1[ug1]=d1
+                    local dg1=duplicates[ug1]
+                    if dg1 then
+                      for u in next,dg1 do
+                        t1[u]=d1
+                      end
+                    end
+                  end
+                else
+                  for g1,d1 in next,c do
+                    t1[indices[g1]]=d1
+                  end
+                end
+                done[c]=t1
+              end
+              step.coverage=t1
+            end
+          elseif kind=="gpos_cursive" then
+            local c=step.coverage
+            if c then
+              local t1=done[c]
+              if not t1 then
+                t1={}
+                if duplicates then
+                  for g1,d1 in next,c do
+                    local ug1=indices[g1]
+                    t1[ug1]=d1
+                    local dg1=duplicates[ug1]
+                    if dg1 then
+                      for u in next,dg1 do
+                        t1[u]=copy(d1)
+                      end
+                    end
+                  end
+                else
+                  for g1,d1 in next,c do
+                    t1[indices[g1]]=d1
+                  end
+                end
+                done[c]=t1
+              end
+              step.coverage=t1
+            end
+          end
+          local rules=step.rules
+          if rules then
+            for i=1,#rules do
+              local rule=rules[i]
+              local before=rule.before  if before then recover(before) end
+              local after=rule.after  if after  then recover(after)  end
+              local current=rule.current if current then recover(current) end
+              local replacements=rule.replacements
+              if replacements then
+                if not done[replacements] then
+                  local r={}
+                  for k,v in next,replacements do
+                    r[indices[k]]=indices[v]
+                  end
+                  rule.replacements=r
+                  done[replacements]=r
+                end
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+  unifythem(resources.sequences)
+  unifythem(resources.sublookups)
+end
+local function copyduplicates(fontdata)
+  if check_duplicates then
+    local descriptions=fontdata.descriptions
+    local resources=fontdata.resources
+    local duplicates=resources.duplicates
+    if check_soft_hyphen then
+      local ds=descriptions[0xAD]
+      if not ds or ds.width==0 then
+        if ds then
+          descriptions[0xAD]=nil
+          report("patching soft hyphen")
+        else
+          report("adding soft hyphen")
+        end
+        if not duplicates then
+          duplicates={}
+          resources.duplicates=duplicates
+        end
+        local dh=duplicates[0x2D]
+        if dh then
+          dh[#dh+1]={ [0xAD]=true }
+        else
+          duplicates[0x2D]={ [0xAD]=true }
+        end
+      end
+    end
+    if duplicates then
+      for u,d in next,duplicates do
+        local du=descriptions[u]
+        if du then
+          local t={ f_character_y(u),"@",f_index(du.index),"->" }
+          local n=0
+          local m=25
+          for u in next,d do
+            if descriptions[u] then
+              if n<m then
+                t[n+4]=f_character_n(u)
+              end
+            else
+              local c=copy(du)
+              c.unicode=u 
+              descriptions[u]=c
+              if n<m then
+                t[n+4]=f_character_y(u)
+              end
+            end
+            n=n+1
+          end
+          if n<=m then
+            report("duplicates: %i : % t",n,t)
+          else
+            report("duplicates: %i : % t ...",n,t)
+          end
+        else
+        end
+      end
+    end
+  end
+end
+local ignore={ 
+  ["notdef"]=true,
+  [".notdef"]=true,
+  ["null"]=true,
+  [".null"]=true,
+  ["nonmarkingreturn"]=true,
+}
+local function checklookups(fontdata,missing,nofmissing)
+  local descriptions=fontdata.descriptions
+  local resources=fontdata.resources
+  if missing and nofmissing and nofmissing<=0 then
+    return
+  end
+  local singles={}
+  local alternates={}
+  local ligatures={}
+  if not missing then
+    missing={}
+    nofmissing=0
+    for u,d in next,descriptions do
+      if not d.unicode then
+        nofmissing=nofmissing+1
+        missing[u]=true
+      end
+    end
+  end
+  local function collectthem(sequences)
+    if not sequences then
+      return
+    end
+    for i=1,#sequences do
+      local sequence=sequences[i]
+      local kind=sequence.type
+      local steps=sequence.steps
+      if steps then
+        for i=1,#steps do
+          local step=steps[i]
+          if kind=="gsub_single" then
+            local c=step.coverage
+            if c then
+              singles[#singles+1]=c
+            end
+          elseif kind=="gsub_alternate" then
+            local c=step.coverage
+            if c then
+              alternates[#alternates+1]=c
+            end
+          elseif kind=="gsub_ligature" then
+            local c=step.coverage
+            if c then
+              ligatures[#ligatures+1]=c
+            end
+          end
+        end
+      end
+    end
+  end
+  collectthem(resources.sequences)
+  collectthem(resources.sublookups)
+  local loops=0
+  while true do
+    loops=loops+1
+    local old=nofmissing
+    for i=1,#singles do
+      local c=singles[i]
+      for g1,g2 in next,c do
+        if missing[g1] then
+          local u2=descriptions[g2].unicode
+          if u2 then
+            missing[g1]=false
+            descriptions[g1].unicode=u2
+            nofmissing=nofmissing-1
+          end
+        end
+        if missing[g2] then
+          local u1=descriptions[g1].unicode
+          if u1 then
+            missing[g2]=false
+            descriptions[g2].unicode=u1
+            nofmissing=nofmissing-1
+          end
+        end
+      end
+    end
+    for i=1,#alternates do
+      local c=alternates[i]
+      for g1,d1 in next,c do
+        if missing[g1] then
+          for i=1,#d1 do
+            local g2=d1[i]
+            local u2=descriptions[g2].unicode
+            if u2 then
+              missing[g1]=false
+              descriptions[g1].unicode=u2
+              nofmissing=nofmissing-1
+            end
+          end
+        end
+        if not missing[g1] then
+          for i=1,#d1 do
+            local g2=d1[i]
+            if missing[g2] then
+              local u1=descriptions[g1].unicode
+              if u1 then
+                missing[g2]=false
+                descriptions[g2].unicode=u1
+                nofmissing=nofmissing-1
+              end
+            end
+          end
+        end
+      end
+    end
+    if nofmissing<=0 then
+      report("all done in %s loops",loops)
+      return
+    elseif old==nofmissing then
+      break
+    end
+  end
+  local t,n 
+  local function recursed(c)
+    for g,d in next,c do
+      if g~="ligature" then
+        local u=descriptions[g].unicode
+        if u then
+          n=n+1
+          t[n]=u
+          recursed(d)
+          n=n-1
+        end
+      elseif missing[d] then
+        local l={}
+        local m=0
+        for i=1,n do
+          local u=t[i]
+          if type(u)=="table" then
+            for i=1,#u do
+              m=m+1
+              l[m]=u[i]
+            end
+          else
+            m=m+1
+            l[m]=u
+          end
+        end
+        missing[d]=false
+        descriptions[d].unicode=l
+        nofmissing=nofmissing-1
+      end
+    end
+  end
+  if nofmissing>0 then
+    t={}
+    n=0
+    local loops=0
+    while true do
+      loops=loops+1
+      local old=nofmissing
+      for i=1,#ligatures do
+        recursed(ligatures[i])
+      end
+      if nofmissing<=0 then
+        report("all done in %s loops",loops)
+        return
+      elseif old==nofmissing then
+        break
+      end
+    end
+    t=nil
+    n=0
+  end
+  if nofmissing>0 then
+    local done={}
+    for i,r in next,missing do
+      if r then
+        local data=descriptions[i]
+        local name=data and data.name or f_index(i)
+        if not ignore[name] then
+          done[name]=true
+        end
+      end
+    end
+    if next(done) then
+      report("not unicoded: % t",sortedkeys(done))
+    end
+  end
+end
+local function unifymissing(fontdata)
+  if not fonts.mappings then
+    require("font-map")
+    require("font-agl")
+  end
+  local unicodes={}
+  local resources=fontdata.resources
+  resources.unicodes=unicodes
+  for unicode,d in next,fontdata.descriptions do
+    if unicode<privateoffset then
+      local name=d.name
+      if name then
+        unicodes[name]=unicode
+      end
+    end
+  end
+  fonts.mappings.addtounicode(fontdata,fontdata.filename,checklookups)
+  resources.unicodes=nil
+end
+local function unifyglyphs(fontdata,usenames)
+  local private=fontdata.private or privateoffset
+  local glyphs=fontdata.glyphs
+  local indices={}
+  local descriptions={}
+  local names=usenames and {}
+  local resources=fontdata.resources
+  local zero=glyphs[0]
+  local zerocode=zero.unicode
+  if not zerocode then
+    zerocode=private
+    zero.unicode=zerocode
+    private=private+1
+  end
+  descriptions[zerocode]=zero
+  if names then
+    local name=glyphs[0].name or f_private(zerocode)
+    indices[0]=name
+    names[name]=zerocode
+  else
+    indices[0]=zerocode
+  end
+  for index=1,#glyphs do
+    local glyph=glyphs[index]
+    local unicode=glyph.unicode 
+    if not unicode then
+      unicode=private
+      if names then
+        local name=glyph.name or f_private(unicode)
+        indices[index]=name
+        names[name]=unicode
+      else
+        indices[index]=unicode
+      end
+      private=private+1
+    elseif descriptions[unicode] then
+      report("assigning private unicode %U to glyph indexed %05X (%C)",private,index,unicode)
+      unicode=private
+      if names then
+        local name=glyph.name or f_private(unicode)
+        indices[index]=name
+        names[name]=unicode
+      else
+        indices[index]=unicode
+      end
+      private=private+1
+    else
+      if names then
+        local name=glyph.name or f_unicode(unicode)
+        indices[index]=name
+        names[name]=unicode
+      else
+        indices[index]=unicode
+      end
+    end
+    descriptions[unicode]=glyph
+  end
+  for index=1,#glyphs do
+    local math=glyphs[index].math
+    if math then
+      local list=math.vparts
+      if list then
+        for i=1,#list do local l=list[i] l.glyph=indices[l.glyph] end
+      end
+      local list=math.hparts
+      if list then
+        for i=1,#list do local l=list[i] l.glyph=indices[l.glyph] end
+      end
+      local list=math.vvariants
+      if list then
+        for i=1,#list do list[i]=indices[list[i]] end
+      end
+      local list=math.hvariants
+      if list then
+        for i=1,#list do list[i]=indices[list[i]] end
+      end
+    end
+  end
+  local colorpalettes=resources.colorpalettes
+  if colorpalettes then
+    for index=1,#glyphs do
+      local colors=glyphs[index].colors
+      if colors then
+        for i=1,#colors do
+          local c=colors[i]
+          c.slot=indices[c.slot]
+        end
+      end
+    end
+  end
+  fontdata.private=private
+  fontdata.glyphs=nil
+  fontdata.names=names
+  fontdata.descriptions=descriptions
+  fontdata.hashmethod=hashmethod
+  return indices,names
+end
+local p_bogusname=(
+  (P("uni")+P("UNI")+P("Uni")+P("U")+P("u"))*S("Xx")^0*R("09","AF")^1+(P("identity")+P("Identity")+P("IDENTITY"))*R("09","AF")^1+(P("index")+P("Index")+P("INDEX"))*R("09")^1
+)*P(-1)
+local function stripredundant(fontdata)
+  local descriptions=fontdata.descriptions
+  if descriptions then
+    local n=0
+    local c=0
+    for unicode,d in next,descriptions do
+      local name=d.name
+      if name and lpegmatch(p_bogusname,name) then
+        d.name=nil
+        n=n+1
+      end
+      if d.class=="base" then
+        d.class=nil
+        c=c+1
+      end
+    end
+    if n>0 then
+      report("%s bogus names removed (verbose unicode)",n)
+    end
+    if c>0 then
+      report("%s base class tags removed (default is base)",c)
+    end
+  end
+end
+function readers.getcomponents(fontdata) 
+  local resources=fontdata.resources
+  if resources then
+    local sequences=resources.sequences
+    if sequences then
+      local collected={}
+      for i=1,#sequences do
+        local sequence=sequences[i]
+        if sequence.type=="gsub_ligature" then
+          local steps=sequence.steps
+          if steps then
+            local l={}
+            local function traverse(p,k,v)
+              if k=="ligature" then
+                collected[v]={ unpack(l) }
+              else
+                insert(l,k)
+                for k,vv in next,v do
+                  traverse(p,k,vv)
+                end
+                remove(l)
+              end
+            end
+            for i=1,#steps do
+              local coverage=steps[i].coverage
+              if coverage then
+                for k,v in next,coverage do
+                  traverse(k,k,v)
+                end
+              end
+            end
+          end
+        end
+      end
+      if next(collected) then
+        while true do
+          local done=false
+          for k,v in next,collected do
+            for i=1,#v do
+              local vi=v[i]
+              if vi==k then
+                collected[k]=nil
+                break
+              else
+                local c=collected[vi]
+                if c then
+                  done=true
+                  local t={}
+                  local n=i-1
+                  for j=1,n do
+                    t[j]=v[j]
+                  end
+                  for j=1,#c do
+                    n=n+1
+                    t[n]=c[j]
+                  end
+                  for j=i+1,#v do
+                    n=n+1
+                    t[n]=v[j]
+                  end
+                  collected[k]=t
+                  break
+                end
+              end
+            end
+          end
+          if not done then
+            break
+          end
+        end
+        return collected
+      end
+    end
+  end
+end
+readers.unifymissing=unifymissing
+function readers.rehash(fontdata,hashmethod) 
+  if not (fontdata and fontdata.glyphs) then
+    return
+  end
+  if hashmethod=="indices" then
+    fontdata.hashmethod="indices"
+  elseif hashmethod=="names" then
+    fontdata.hashmethod="names"
+    local indices=unifyglyphs(fontdata,true)
+    unifyresources(fontdata,indices)
+    copyduplicates(fontdata)
+    unifymissing(fontdata)
+  else
+    fontdata.hashmethod="unicodes"
+    local indices=unifyglyphs(fontdata)
+    unifyresources(fontdata,indices)
+    copyduplicates(fontdata)
+    unifymissing(fontdata)
+    stripredundant(fontdata)
+  end
+end
+function readers.checkhash(fontdata)
+  local hashmethod=fontdata.hashmethod
+  if hashmethod=="unicodes" then
+    fontdata.names=nil 
+  elseif hashmethod=="names" and fontdata.names then
+    unifyresources(fontdata,fontdata.names)
+    copyduplicates(fontdata)
+    fontdata.hashmethod="unicodes"
+    fontdata.names=nil 
+  else
+    readers.rehash(fontdata,"unicodes")
+  end
+end
+function readers.addunicodetable(fontdata)
+  local resources=fontdata.resources
+  local unicodes=resources.unicodes
+  if not unicodes then
+    local descriptions=fontdata.descriptions
+    if descriptions then
+      unicodes={}
+      resources.unicodes=unicodes
+      for u,d in next,descriptions do
+        local n=d.name
+        if n then
+          unicodes[n]=u
+        end
+      end
+    end
+  end
+end
+local concat,sort=table.concat,table.sort
+local next,type,tostring=next,type,tostring
+local criterium=1
+local threshold=0
+local trace_packing=false trackers.register("otf.packing",function(v) trace_packing=v end)
+local trace_loading=false trackers.register("otf.loading",function(v) trace_loading=v end)
+local report_otf=logs.reporter("fonts","otf loading")
+local function tabstr_normal(t)
+  local s={}
+  local n=0
+  for k,v in next,t do
+    n=n+1
+    if type(v)=="table" then
+      s[n]=k..">"..tabstr_normal(v)
+    elseif v==true then
+      s[n]=k.."+" 
+    elseif v then
+      s[n]=k.."="..v
+    else
+      s[n]=k.."-" 
+    end
+  end
+  if n==0 then
+    return ""
+  elseif n==1 then
+    return s[1]
+  else
+    sort(s) 
+    return concat(s,",")
+  end
+end
+local function tabstr_flat(t)
+  local s={}
+  local n=0
+  for k,v in next,t do
+    n=n+1
+    s[n]=k.."="..v
+  end
+  if n==0 then
+    return ""
+  elseif n==1 then
+    return s[1]
+  else
+    sort(s) 
+    return concat(s,",")
+  end
+end
+local function tabstr_mixed(t) 
+  local s={}
+  local n=#t
+  if n==0 then
+    return ""
+  elseif n==1 then
+    local k=t[1]
+    if k==true then
+      return "++" 
+    elseif k==false then
+      return "--" 
+    else
+      return tostring(k) 
+    end
+  else
+    for i=1,n do
+      local k=t[i]
+      if k==true then
+        s[i]="++" 
+      elseif k==false then
+        s[i]="--" 
+      else
+        s[i]=k 
+      end
+    end
+    return concat(s,",")
+  end
+end
+local function tabstr_boolean(t)
+  local s={}
+  local n=0
+  for k,v in next,t do
+    n=n+1
+    if v then
+      s[n]=k.."+"
+    else
+      s[n]=k.."-"
+    end
+  end
+  if n==0 then
+    return ""
+  elseif n==1 then
+    return s[1]
+  else
+    sort(s) 
+    return concat(s,",")
+  end
+end
+function readers.pack(data)
+  if data then
+    local h,t,c={},{},{}
+    local hh,tt,cc={},{},{}
+    local nt,ntt=0,0
+    local function pack_normal(v)
+      local tag=tabstr_normal(v)
+      local ht=h[tag]
+      if ht then
+        c[ht]=c[ht]+1
+        return ht
+      else
+        nt=nt+1
+        t[nt]=v
+        h[tag]=nt
+        c[nt]=1
+        return nt
+      end
+    end
+    local function pack_normal_cc(v)
+      local tag=tabstr_normal(v)
+      local ht=h[tag]
+      if ht then
+        c[ht]=c[ht]+1
+        return ht
+      else
+        v[1]=0
+        nt=nt+1
+        t[nt]=v
+        h[tag]=nt
+        c[nt]=1
+        return nt
+      end
+    end
+    local function pack_flat(v)
+      local tag=tabstr_flat(v)
+      local ht=h[tag]
+      if ht then
+        c[ht]=c[ht]+1
+        return ht
+      else
+        nt=nt+1
+        t[nt]=v
+        h[tag]=nt
+        c[nt]=1
+        return nt
+      end
+    end
+    local function pack_indexed(v)
+      local tag=concat(v," ")
+      local ht=h[tag]
+      if ht then
+        c[ht]=c[ht]+1
+        return ht
+      else
+        nt=nt+1
+        t[nt]=v
+        h[tag]=nt
+        c[nt]=1
+        return nt
+      end
+    end
+    local function pack_mixed(v)
+      local tag=tabstr_mixed(v)
+      local ht=h[tag]
+      if ht then
+        c[ht]=c[ht]+1
+        return ht
+      else
+        nt=nt+1
+        t[nt]=v
+        h[tag]=nt
+        c[nt]=1
+        return nt
+      end
+    end
+    local function pack_boolean(v)
+      local tag=tabstr_boolean(v)
+      local ht=h[tag]
+      if ht then
+        c[ht]=c[ht]+1
+        return ht
+      else
+        nt=nt+1
+        t[nt]=v
+        h[tag]=nt
+        c[nt]=1
+        return nt
+      end
+    end
+    local function pack_final(v)
+      if c[v]<=criterium then
+        return t[v]
+      else
+        local hv=hh[v]
+        if hv then
+          return hv
+        else
+          ntt=ntt+1
+          tt[ntt]=t[v]
+          hh[v]=ntt
+          cc[ntt]=c[v]
+          return ntt
+        end
+      end
+    end
+    local function pack_final_cc(v)
+      if c[v]<=criterium then
+        return t[v]
+      else
+        local hv=hh[v]
+        if hv then
+          return hv
+        else
+          ntt=ntt+1
+          tt[ntt]=t[v]
+          hh[v]=ntt
+          cc[ntt]=c[v]
+          return ntt
+        end
+      end
+    end
+    local function success(stage,pass)
+      if nt==0 then
+        if trace_loading or trace_packing then
+          report_otf("pack quality: nothing to pack")
+        end
+        return false
+      elseif nt>=threshold then
+        local one,two,rest=0,0,0
+        if pass==1 then
+          for k,v in next,c do
+            if v==1 then
+              one=one+1
+            elseif v==2 then
+              two=two+1
+            else
+              rest=rest+1
+            end
+          end
+        else
+          for k,v in next,cc do
+            if v>20 then
+              rest=rest+1
+            elseif v>10 then
+              two=two+1
+            else
+              one=one+1
+            end
+          end
+          data.tables=tt
+        end
+        if trace_loading or trace_packing then
+          report_otf("pack quality: stage %s, pass %s, %s packed, 1-10:%s, 11-20:%s, rest:%s (criterium: %s)",
+            stage,pass,one+two+rest,one,two,rest,criterium)
+        end
+        return true
+      else
+        if trace_loading or trace_packing then
+          report_otf("pack quality: stage %s, pass %s, %s packed, aborting pack (threshold: %s)",
+            stage,pass,nt,threshold)
+        end
+        return false
+      end
+    end
+    local function packers(pass)
+      if pass==1 then
+        return pack_normal,pack_indexed,pack_flat,pack_boolean,pack_mixed,pack_normal_cc
+      else
+        return pack_final,pack_final,pack_final,pack_final,pack_final,pack_final_cc
+      end
+    end
+    local resources=data.resources
+    local sequences=resources.sequences
+    local sublookups=resources.sublookups
+    local features=resources.features
+    local palettes=resources.colorpalettes
+    local variable=resources.variabledata
+    local chardata=characters and characters.data
+    local descriptions=data.descriptions or data.glyphs
+    if not descriptions then
+      return
+    end
+    for pass=1,2 do
+      if trace_packing then
+        report_otf("start packing: stage 1, pass %s",pass)
+      end
+      local pack_normal,pack_indexed,pack_flat,pack_boolean,pack_mixed,pack_normal_cc=packers(pass)
+      for unicode,description in next,descriptions do
+        local boundingbox=description.boundingbox
+        if boundingbox then
+          description.boundingbox=pack_indexed(boundingbox)
+        end
+        local math=description.math
+        if math then
+          local kerns=math.kerns
+          if kerns then
+            for tag,kern in next,kerns do
+              kerns[tag]=pack_normal(kern)
+            end
+          end
+        end
+      end
+      local function packthem(sequences)
+        for i=1,#sequences do
+          local sequence=sequences[i]
+          local kind=sequence.type
+          local steps=sequence.steps
+          local order=sequence.order
+          local features=sequence.features
+          local flags=sequence.flags
+          if steps then
+            for i=1,#steps do
+              local step=steps[i]
+              if kind=="gpos_pair" then
+                local c=step.coverage
+                if c then
+                  if step.format=="pair" then
+                    for g1,d1 in next,c do
+                      for g2,d2 in next,d1 do
+                        local f=d2[1] if f and f~=true then d2[1]=pack_indexed(f) end
+                        local s=d2[2] if s and s~=true then d2[2]=pack_indexed(s) end
+                      end
+                    end
+                  else
+                    for g1,d1 in next,c do
+                      c[g1]=pack_normal(d1)
+                    end
+                  end
+                end
+              elseif kind=="gpos_single" then
+                local c=step.coverage
+                if c then
+                  if step.format=="single" then
+                    for g1,d1 in next,c do
+                      if d1 and d1~=true then
+                        c[g1]=pack_indexed(d1)
+                      end
+                    end
+                  else
+                    step.coverage=pack_normal(c)
+                  end
+                end
+              elseif kind=="gpos_cursive" then
+                local c=step.coverage
+                if c then
+                  for g1,d1 in next,c do
+                    local f=d1[2] if f then d1[2]=pack_indexed(f) end
+                    local s=d1[3] if s then d1[3]=pack_indexed(s) end
+                  end
+                end
+              elseif kind=="gpos_mark2base" or kind=="gpos_mark2mark" then
+                local c=step.baseclasses
+                if c then
+                  for g1,d1 in next,c do
+                    for g2,d2 in next,d1 do
+                      d1[g2]=pack_indexed(d2)
+                    end
+                  end
+                end
+                local c=step.coverage
+                if c then
+                  for g1,d1 in next,c do
+                    d1[2]=pack_indexed(d1[2])
+                  end
+                end
+              elseif kind=="gpos_mark2ligature" then
+                local c=step.baseclasses
+                if c then
+                  for g1,d1 in next,c do
+                    for g2,d2 in next,d1 do
+                      for g3,d3 in next,d2 do
+                        d2[g3]=pack_indexed(d3)
+                      end
+                    end
+                  end
+                end
+                local c=step.coverage
+                if c then
+                  for g1,d1 in next,c do
+                    d1[2]=pack_indexed(d1[2])
+                  end
+                end
+              end
+              local rules=step.rules
+              if rules then
+                for i=1,#rules do
+                  local rule=rules[i]
+                  local r=rule.before    if r then for i=1,#r do r[i]=pack_boolean(r[i]) end end
+                  local r=rule.after    if r then for i=1,#r do r[i]=pack_boolean(r[i]) end end
+                  local r=rule.current   if r then for i=1,#r do r[i]=pack_boolean(r[i]) end end
+                  local r=rule.replacements if r then rule.replacements=pack_flat  (r)  end
+                end
+              end
+            end
+          end
+          if order then
+            sequence.order=pack_indexed(order)
+          end
+          if features then
+            for script,feature in next,features do
+              features[script]=pack_normal(feature)
+            end
+          end
+          if flags then
+            sequence.flags=pack_normal(flags)
+          end
+        end
+      end
+      if sequences then
+        packthem(sequences)
+      end
+      if sublookups then
+        packthem(sublookups)
+      end
+      if features then
+        for k,list in next,features do
+          for feature,spec in next,list do
+            list[feature]=pack_normal(spec)
+          end
+        end
+      end
+      if palettes then
+        for i=1,#palettes do
+          local p=palettes[i]
+          for j=1,#p do
+            p[j]=pack_indexed(p[j])
+          end
+        end
+      end
+      if variable then
+        local instances=variable.instances
+        if instances then
+          for i=1,#instances do
+            local v=instances[i].values
+            for j=1,#v do
+              v[j]=pack_normal(v[j])
+            end
+          end
+        end
+        local function packdeltas(main)
+          if main then
+            local deltas=main.deltas
+            if deltas then
+              for i=1,#deltas do
+                local di=deltas[i]
+                local d=di.deltas
+                for j=1,#d do
+                  d[j]=pack_indexed(d[j])
+                end
+                di.regions=pack_indexed(di.regions)
+              end
+            end
+            local regions=main.regions
+            if regions then
+              for i=1,#regions do
+                local r=regions[i]
+                for j=1,#r do
+                  r[j]=pack_normal(r[j])
+                end
+              end
+            end
+          end
+        end
+        packdeltas(variable.global)
+        packdeltas(variable.horizontal)
+        packdeltas(variable.vertical)
+        packdeltas(variable.metrics)
+      end
+      if not success(1,pass) then
+        return
+      end
+    end
+    if nt>0 then
+      for pass=1,2 do
+        if trace_packing then
+          report_otf("start packing: stage 2, pass %s",pass)
+        end
+        local pack_normal,pack_indexed,pack_flat,pack_boolean,pack_mixed,pack_normal_cc=packers(pass)
+        for unicode,description in next,descriptions do
+          local math=description.math
+          if math then
+            local kerns=math.kerns
+            if kerns then
+              math.kerns=pack_normal(kerns)
+            end
+          end
+        end
+        local function packthem(sequences)
+          for i=1,#sequences do
+            local sequence=sequences[i]
+            local kind=sequence.type
+            local steps=sequence.steps
+            local features=sequence.features
+            if steps then
+              for i=1,#steps do
+                local step=steps[i]
+                if kind=="gpos_pair" then
+                  local c=step.coverage
+                  if c then
+                    if step.format=="pair" then
+                      for g1,d1 in next,c do
+                        for g2,d2 in next,d1 do
+                          d1[g2]=pack_normal(d2)
+                        end
+                      end
+                    end
+                  end
+                elseif kind=="gpos_mark2ligature" then
+                  local c=step.baseclasses 
+                  if c then
+                    for g1,d1 in next,c do
+                      for g2,d2 in next,d1 do
+                        d1[g2]=pack_normal(d2)
+                      end
+                    end
+                  end
+                end
+                local rules=step.rules
+                if rules then
+                  for i=1,#rules do
+                    local rule=rules[i]
+                    local r=rule.before if r then rule.before=pack_normal(r) end
+                    local r=rule.after  if r then rule.after=pack_normal(r) end
+                    local r=rule.current if r then rule.current=pack_normal(r) end
+                  end
+                end
+              end
+            end
+            if features then
+              sequence.features=pack_normal(features)
+            end
+          end
+        end
+        if sequences then
+          packthem(sequences)
+        end
+        if sublookups then
+          packthem(sublookups)
+        end
+        if variable then
+          local function unpackdeltas(main)
+            if main then
+              local regions=main.regions
+              if regions then
+                main.regions=pack_normal(regions)
+              end
+            end
+          end
+          unpackdeltas(variable.global)
+          unpackdeltas(variable.horizontal)
+          unpackdeltas(variable.vertical)
+          unpackdeltas(variable.metrics)
+        end
+      end
+      for pass=1,2 do
+        if trace_packing then
+          report_otf("start packing: stage 3, pass %s",pass)
+        end
+        local pack_normal,pack_indexed,pack_flat,pack_boolean,pack_mixed,pack_normal_cc=packers(pass)
+        local function packthem(sequences)
+          for i=1,#sequences do
+            local sequence=sequences[i]
+            local kind=sequence.type
+            local steps=sequence.steps
+            local features=sequence.features
+            if steps then
+              for i=1,#steps do
+                local step=steps[i]
+                if kind=="gpos_pair" then
+                  local c=step.coverage
+                  if c then
+                    if step.format=="pair" then
+                      for g1,d1 in next,c do
+                        c[g1]=pack_normal(d1)
+                      end
+                    end
+                  end
+                elseif kind=="gpos_cursive" then
+                  local c=step.coverage
+                  if c then
+                    for g1,d1 in next,c do
+                      c[g1]=pack_normal_cc(d1)
+                    end
+                  end
+                end
+              end
+            end
+          end
+        end
+        if sequences then
+          packthem(sequences)
+        end
+        if sublookups then
+          packthem(sublookups)
+        end
+      end
+    end
+  end
+end
+local unpacked_mt={
+  __index=function(t,k)
+      t[k]=false
+      return k 
+    end
+}
+function readers.unpack(data)
+  if data then
+    local tables=data.tables
+    if tables then
+      local resources=data.resources
+      local descriptions=data.descriptions or data.glyphs
+      local sequences=resources.sequences
+      local sublookups=resources.sublookups
+      local features=resources.features
+      local palettes=resources.colorpalettes
+      local variable=resources.variabledata
+      local unpacked={}
+      setmetatable(unpacked,unpacked_mt)
+      for unicode,description in next,descriptions do
+        local tv=tables[description.boundingbox]
+        if tv then
+          description.boundingbox=tv
+        end
+        local math=description.math
+        if math then
+          local kerns=math.kerns
+          if kerns then
+            local tm=tables[kerns]
+            if tm then
+              math.kerns=tm
+              kerns=unpacked[tm]
+            end
+            if kerns then
+              for k,kern in next,kerns do
+                local tv=tables[kern]
+                if tv then
+                  kerns[k]=tv
+                end
+              end
+            end
+          end
+        end
+      end
+      local function unpackthem(sequences)
+        for i=1,#sequences do
+          local sequence=sequences[i]
+          local kind=sequence.type
+          local steps=sequence.steps
+          local order=sequence.order
+          local features=sequence.features
+          local flags=sequence.flags
+          local markclass=sequence.markclass
+          if features then
+            local tv=tables[features]
+            if tv then
+              sequence.features=tv
+              features=tv
+            end
+            for script,feature in next,features do
+              local tv=tables[feature]
+              if tv then
+                features[script]=tv
+              end
+            end
+          end
+          if steps then
+            for i=1,#steps do
+              local step=steps[i]
+              if kind=="gpos_pair" then
+                local c=step.coverage
+                if c then
+                  if step.format=="pair" then
+                    for g1,d1 in next,c do
+                      local tv=tables[d1]
+                      if tv then
+                        c[g1]=tv
+                        d1=tv
+                      end
+                      for g2,d2 in next,d1 do
+                        local tv=tables[d2]
+                        if tv then
+                          d1[g2]=tv
+                          d2=tv
+                        end
+                        local f=tables[d2[1]] if f then d2[1]=f end
+                        local s=tables[d2[2]] if s then d2[2]=s end
+                      end
+                    end
+                  else
+                    for g1,d1 in next,c do
+                      local tv=tables[d1]
+                      if tv then
+                        c[g1]=tv
+                      end
+                    end
+                  end
+                end
+              elseif kind=="gpos_single" then
+                local c=step.coverage
+                if c then
+                  if step.format=="single" then
+                    for g1,d1 in next,c do
+                      local tv=tables[d1]
+                      if tv then
+                        c[g1]=tv
+                      end
+                    end
+                  else
+                    local tv=tables[c]
+                    if tv then
+                      step.coverage=tv
+                    end
+                  end
+                end
+              elseif kind=="gpos_cursive" then
+                local c=step.coverage
+                if c then
+                  for g1,d1 in next,c do
+                    local tv=tables[d1]
+                    if tv then
+                      d1=tv
+                      c[g1]=d1
+                    end
+                    local f=tables[d1[2]] if f then d1[2]=f end
+                    local s=tables[d1[3]] if s then d1[3]=s end
+                  end
+                end
+              elseif kind=="gpos_mark2base" or kind=="gpos_mark2mark" then
+                local c=step.baseclasses
+                if c then
+                  for g1,d1 in next,c do
+                    for g2,d2 in next,d1 do
+                      local tv=tables[d2]
+                      if tv then
+                        d1[g2]=tv
+                      end
+                    end
+                  end
+                end
+                local c=step.coverage
+                if c then
+                  for g1,d1 in next,c do
+                    local tv=tables[d1[2]]
+                    if tv then
+                      d1[2]=tv
+                    end
+                  end
+                end
+              elseif kind=="gpos_mark2ligature" then
+                local c=step.baseclasses
+                if c then
+                  for g1,d1 in next,c do
+                    for g2,d2 in next,d1 do
+                      local tv=tables[d2] 
+                      if tv then
+                        d2=tv
+                        d1[g2]=d2
+                      end
+                      for g3,d3 in next,d2 do
+                        local tv=tables[d2[g3]]
+                        if tv then
+                          d2[g3]=tv
+                        end
+                      end
+                    end
+                  end
+                end
+                local c=step.coverage
+                if c then
+                  for g1,d1 in next,c do
+                    local tv=tables[d1[2]]
+                    if tv then
+                      d1[2]=tv
+                    end
+                  end
+                end
+              end
+              local rules=step.rules
+              if rules then
+                for i=1,#rules do
+                  local rule=rules[i]
+                  local before=rule.before
+                  if before then
+                    local tv=tables[before]
+                    if tv then
+                      rule.before=tv
+                      before=tv
+                    end
+                    for i=1,#before do
+                      local tv=tables[before[i]]
+                      if tv then
+                        before[i]=tv
+                      end
+                    end
+                  end
+                  local after=rule.after
+                  if after then
+                    local tv=tables[after]
+                    if tv then
+                      rule.after=tv
+                      after=tv
+                    end
+                    for i=1,#after do
+                      local tv=tables[after[i]]
+                      if tv then
+                        after[i]=tv
+                      end
+                    end
+                  end
+                  local current=rule.current
+                  if current then
+                    local tv=tables[current]
+                    if tv then
+                      rule.current=tv
+                      current=tv
+                    end
+                    for i=1,#current do
+                      local tv=tables[current[i]]
+                      if tv then
+                        current[i]=tv
+                      end
+                    end
+                  end
+                  local replacements=rule.replacements
+                  if replacements then
+                    local tv=tables[replacements]
+                    if tv then
+                      rule.replacements=tv
+                    end
+                  end
+                end
+              end
+            end
+          end
+          if order then
+            local tv=tables[order]
+            if tv then
+              sequence.order=tv
+            end
+          end
+          if flags then
+            local tv=tables[flags]
+            if tv then
+              sequence.flags=tv
+            end
+          end
+        end
+      end
+      if sequences then
+        unpackthem(sequences)
+      end
+      if sublookups then
+        unpackthem(sublookups)
+      end
+      if features then
+        for k,list in next,features do
+          for feature,spec in next,list do
+            local tv=tables[spec]
+            if tv then
+              list[feature]=tv
+            end
+          end
+        end
+      end
+      if palettes then
+        for i=1,#palettes do
+          local p=palettes[i]
+          for j=1,#p do
+            local tv=tables[p[j]]
+            if tv then
+              p[j]=tv
+            end
+          end
+        end
+      end
+      if variable then
+        local instances=variable.instances
+        if instances then
+          for i=1,#instances do
+            local v=instances[i].values
+            for j=1,#v do
+              local tv=tables[v[j]]
+              if tv then
+                v[j]=tv
+              end
+            end
+          end
+        end
+        local function unpackdeltas(main)
+          if main then
+            local deltas=main.deltas
+            if deltas then
+              for i=1,#deltas do
+                local di=deltas[i]
+                local d=di.deltas
+                local r=di.regions
+                for j=1,#d do
+                  local tv=tables[d[j]]
+                  if tv then
+                    d[j]=tv
+                  end
+                end
+                local tv=di.regions
+                if tv then
+                  di.regions=tv
+                end
+              end
+            end
+            local regions=main.regions
+            if regions then
+              local tv=tables[regions]
+              if tv then
+                main.regions=tv
+                regions=tv
+              end
+              for i=1,#regions do
+                local r=regions[i]
+                for j=1,#r do
+                  local tv=tables[r[j]]
+                  if tv then
+                    r[j]=tv
+                  end
+                end
+              end
+            end
+          end
+        end
+        unpackdeltas(variable.global)
+        unpackdeltas(variable.horizontal)
+        unpackdeltas(variable.vertical)
+        unpackdeltas(variable.metrics)
+      end
+      data.tables=nil
+    end
+  end
+end
+local mt={
+  __index=function(t,k) 
+    if k=="height" then
+      local ht=t.boundingbox[4]
+      return ht<0 and 0 or ht
+    elseif k=="depth" then
+      local dp=-t.boundingbox[2]
+      return dp<0 and 0 or dp
+    elseif k=="width" then
+      return 0
+    elseif k=="name" then 
+      return forcenotdef and ".notdef"
+    end
+  end
+}
+local function sameformat(sequence,steps,first,nofsteps,kind)
+  return true
+end
+local function mergesteps_1(lookup,strict)
+  local steps=lookup.steps
+  local nofsteps=lookup.nofsteps
+  local first=steps[1]
+  if strict then
+    local f=first.format
+    for i=2,nofsteps do
+      if steps[i].format~=f then
+        report("not merging %a steps of %a lookup %a, different formats",nofsteps,lookup.type,lookup.name)
+        return 0
+      end
+    end
+  end
+  report("merging %a steps of %a lookup %a",nofsteps,lookup.type,lookup.name)
+  local target=first.coverage
+  for i=2,nofsteps do
+    for k,v in next,steps[i].coverage do
+      if not target[k] then
+        target[k]=v
+      end
+    end
+  end
+  lookup.nofsteps=1
+  lookup.merged=true
+  lookup.steps={ first }
+  return nofsteps-1
+end
+local function mergesteps_2(lookup,strict) 
+  local steps=lookup.steps
+  local nofsteps=lookup.nofsteps
+  local first=steps[1]
+  if strict then
+    local f=first.format
+    for i=2,nofsteps do
+      if steps[i].format~=f then
+        report("not merging %a steps of %a lookup %a, different formats",nofsteps,lookup.type,lookup.name)
+        return 0
+      end
+    end
+  end
+  report("merging %a steps of %a lookup %a",nofsteps,lookup.type,lookup.name)
+  local target=first.coverage
+  for i=2,nofsteps do
+    for k,v in next,steps[i].coverage do
+      local tk=target[k]
+      if tk then
+        for k,v in next,v do
+          if not tk[k] then
+            tk[k]=v
+          end
+        end
+      else
+        target[k]=v
+      end
+    end
+  end
+  lookup.nofsteps=1
+  lookup.steps={ first }
+  return nofsteps-1
+end
+local function mergesteps_3(lookup,strict) 
+  local steps=lookup.steps
+  local nofsteps=lookup.nofsteps
+  report("merging %a steps of %a lookup %a",nofsteps,lookup.type,lookup.name)
+  local coverage={}
+  for i=1,nofsteps do
+    for k,v in next,steps[i].coverage do
+      local tk=coverage[k] 
+      if tk then
+        report("quitting merge due to multiple checks")
+        return nofsteps
+      else
+        coverage[k]=v
+      end
+    end
+  end
+  local first=steps[1]
+  local baseclasses={} 
+  for i=1,nofsteps do
+    local offset=i*10 
+    local step=steps[i]
+    for k,v in sortedhash(step.baseclasses) do
+      baseclasses[offset+k]=v
+    end
+    for k,v in next,step.coverage do
+      v[1]=offset+v[1]
+    end
+  end
+  first.baseclasses=baseclasses
+  first.coverage=coverage
+  lookup.nofsteps=1
+  lookup.steps={ first }
+  return nofsteps-1
+end
+local function nested(old,new)
+  for k,v in next,old do
+    if k=="ligature" then
+      if not new.ligature then
+        new.ligature=v
+      end
+    else
+      local n=new[k]
+      if n then
+        nested(v,n)
+      else
+        new[k]=v
+      end
+    end
+  end
+end
+local function mergesteps_4(lookup) 
+  local steps=lookup.steps
+  local nofsteps=lookup.nofsteps
+  local first=steps[1]
+  report("merging %a steps of %a lookup %a",nofsteps,lookup.type,lookup.name)
+  local target=first.coverage
+  for i=2,nofsteps do
+    for k,v in next,steps[i].coverage do
+      local tk=target[k]
+      if tk then
+        nested(v,tk)
+      else
+        target[k]=v
+      end
+    end
+  end
+  lookup.nofsteps=1
+  lookup.steps={ first }
+  return nofsteps-1
+end
+local function checkkerns(lookup)
+  local steps=lookup.steps
+  local nofsteps=lookup.nofsteps
+  local kerned=0
+  for i=1,nofsteps do
+    local step=steps[i]
+    if step.format=="pair" then
+      local coverage=step.coverage
+      local kerns=true
+      for g1,d1 in next,coverage do
+        if d1==true then
+        elseif not d1 then
+        elseif d1[1]~=0 or d1[2]~=0 or d1[4]~=0 then
+          kerns=false
+          break
+        end
+      end
+      if kerns then
+        report("turning pairs of step %a of %a lookup %a into kerns",i,lookup.type,lookup.name)
+        local c={}
+        for g1,d1 in next,coverage do
+          if d1 and d1~=true then
+            c[g1]=d1[3]
+          end
+        end
+        step.coverage=c
+        step.format="move"
+        kerned=kerned+1
+      end
+    end
+  end
+  return kerned
+end
+local function checkpairs(lookup)
+  local steps=lookup.steps
+  local nofsteps=lookup.nofsteps
+  local kerned=0
+  local function onlykerns(step)
+    local coverage=step.coverage
+    for g1,d1 in next,coverage do
+      for g2,d2 in next,d1 do
+        if d2[2] then
+          return false
+        else
+          local v=d2[1]
+          if v==true then
+          elseif v and (v[1]~=0 or v[2]~=0 or v[4]~=0) then
+            return false
+          end
+        end
+      end
+    end
+    return coverage
+  end
+  for i=1,nofsteps do
+    local step=steps[i]
+    if step.format=="pair" then
+      local coverage=onlykerns(step)
+      if coverage then
+        report("turning pairs of step %a of %a lookup %a into kerns",i,lookup.type,lookup.name)
+        for g1,d1 in next,coverage do
+          local d={}
+          for g2,d2 in next,d1 do
+            local v=d2[1]
+            if v==true then
+            elseif v then
+              d[g2]=v[3] 
+            end
+          end
+          coverage[g1]=d
+        end
+        step.format="move"
+        kerned=kerned+1
+      end
+    end
+  end
+  return kerned
+end
+local compact_pairs=true
+local compact_singles=true
+directives.register("otf.compact.pairs",function(v) compact_pairs=v end)
+directives.register("otf.compact.singles",function(v) compact_singles=v end)
+function readers.compact(data)
+  if not data or data.compacted then
+    return
+  else
+    data.compacted=true
+  end
+  local resources=data.resources
+  local merged=0
+  local kerned=0
+  local allsteps=0
+  local function compact(what)
+    local lookups=resources[what]
+    if lookups then
+      for i=1,#lookups do
+        local lookup=lookups[i]
+        local nofsteps=lookup.nofsteps
+        local kind=lookup.type
+        allsteps=allsteps+nofsteps
+        if nofsteps>1 then
+          local merg=merged
+          if kind=="gsub_single" or kind=="gsub_alternate" or kind=="gsub_multiple" then
+            merged=merged+mergesteps_1(lookup)
+          elseif kind=="gsub_ligature" then
+            merged=merged+mergesteps_4(lookup)
+          elseif kind=="gpos_single" then
+            merged=merged+mergesteps_1(lookup,true)
+            if compact_singles then
+              kerned=kerned+checkkerns(lookup)
+            end
+          elseif kind=="gpos_pair" then
+            merged=merged+mergesteps_2(lookup,true)
+            if compact_pairs then
+              kerned=kerned+checkpairs(lookup)
+            end
+          elseif kind=="gpos_cursive" then
+            merged=merged+mergesteps_2(lookup)
+          elseif kind=="gpos_mark2mark" or kind=="gpos_mark2base" or kind=="gpos_mark2ligature" then
+            merged=merged+mergesteps_3(lookup)
+          end
+          if merg~=merged then
+            lookup.merged=true
+          end
+        elseif nofsteps==1 then
+          if kind=="gpos_single" then
+            if compact_singles then
+              kerned=kerned+checkkerns(lookup)
+            end
+          elseif kind=="gpos_pair" then
+            if compact_pairs then
+              kerned=kerned+checkpairs(lookup)
+            end
+          end
+        end
+      end
+    else
+      report("no lookups in %a",what)
+    end
+  end
+  compact("sequences")
+  compact("sublookups")
+  if merged>0 then
+    report("%i steps of %i removed due to merging",merged,allsteps)
+  end
+  if kerned>0 then
+    report("%i steps of %i steps turned from pairs into kerns",kerned,allsteps)
+  end
+end
+local function mergesteps(t,k)
+  if k=="merged" then
+    local merged={}
+    for i=1,#t do
+      local step=t[i]
+      local coverage=step.coverage
+      for k in next,coverage do
+        local m=merged[k]
+        if m then
+          m[2]=i
+        else
+          merged[k]={ i,i }
+        end
+      end
+    end
+    t.merged=merged
+    return merged
+  end
+end
+if fonts.helpers then
+  fonts.helpers.mergesteps=mergesteps
+end
+function readers.expand(data)
+  if not data or data.expanded then
+    return
+  else
+    data.expanded=true
+  end
+  local resources=data.resources
+  local sublookups=resources.sublookups
+  local sequences=resources.sequences 
+  local markclasses=resources.markclasses
+  local descriptions=data.descriptions
+  if descriptions then
+    local defaultwidth=resources.defaultwidth or 0
+    local defaultheight=resources.defaultheight or 0
+    local defaultdepth=resources.defaultdepth or 0
+    local basename=trace_markwidth and file.basename(resources.filename)
+    for u,d in next,descriptions do
+      local bb=d.boundingbox
+      local wd=d.width
+      if not wd then
+        d.width=defaultwidth
+      elseif trace_markwidth and wd~=0 and d.class=="mark" then
+        report("mark %a with width %b found in %a",d.name or "<noname>",wd,basename)
+      end
+      if bb then
+        local ht=bb[4]
+        local dp=-bb[2]
+        if ht==0 or ht<0 then
+        else
+          d.height=ht
+        end
+        if dp==0 or dp<0 then
+        else
+          d.depth=dp
+        end
+      end
+    end
+  end
+  local function expandlookups(sequences)
+    if sequences then
+      for i=1,#sequences do
+        local sequence=sequences[i]
+        local steps=sequence.steps
+        if steps then
+          local nofsteps=sequence.nofsteps
+          setmetatableindex(steps,mergesteps)
+          local kind=sequence.type
+          local markclass=sequence.markclass
+          if markclass then
+            if not markclasses then
+              report_warning("missing markclasses")
+              sequence.markclass=false
+            else
+              sequence.markclass=markclasses[markclass]
+            end
+          end
+          local flags=sequence.flags
+          if flags then
+            flags[5]=flags[1]~=false 
+                or flags[2]~=false 
+                or flags[3]~=false 
+                or sequence.markclass
+                or false
+          end
+          for i=1,nofsteps do
+            local step=steps[i]
+            local baseclasses=step.baseclasses
+            if baseclasses then
+              local coverage=step.coverage
+              for k,v in next,coverage do
+                v[1]=baseclasses[v[1]] 
+              end
+            elseif kind=="gpos_cursive" then
+              local coverage=step.coverage
+              for k,v in next,coverage do
+                v[1]=coverage 
+              end
+            end
+            local rules=step.rules
+            if rules then
+              local rulehash={}
+              local rulesize=0
+              local coverage={}
+              local lookuptype=sequence.type
+              step.coverage=coverage 
+              for nofrules=1,#rules do
+                local rule=rules[nofrules]
+                local current=rule.current
+                local before=rule.before
+                local after=rule.after
+                local replacements=rule.replacements or false
+                local sequence={}
+                local nofsequences=0
+                if before then
+                  for n=1,#before do
+                    nofsequences=nofsequences+1
+                    sequence[nofsequences]=before[n]
+                  end
+                end
+                local start=nofsequences+1
+                for n=1,#current do
+                  nofsequences=nofsequences+1
+                  sequence[nofsequences]=current[n]
+                end
+                local stop=nofsequences
+                if after then
+                  for n=1,#after do
+                    nofsequences=nofsequences+1
+                    sequence[nofsequences]=after[n]
+                  end
+                end
+                local lookups=rule.lookups or false
+                local subtype=nil
+                if lookups then
+                  for i=1,#lookups do
+                    local lookups=lookups[i]
+                    if lookups then
+                      for k,v in next,lookups do
+                        local lookup=sublookups[v]
+                        if lookup then
+                          lookups[k]=lookup
+                          if not subtype then
+                            subtype=lookup.type
+                          end
+                        else
+                        end
+                      end
+                    end
+                  end
+                end
+                if sequence[1] then 
+                  sequence.n=#sequence 
+                  rulesize=rulesize+1
+                  rulehash[rulesize]={
+                    nofrules,
+                    lookuptype,
+                    sequence,
+                    start,
+                    stop,
+                    lookups,
+                    replacements,
+                    subtype,
+                  }
+                  for unic in next,sequence[start] do
+                    local cu=coverage[unic]
+                    if not cu then
+                      coverage[unic]=rulehash 
+                    else
+                    end
+                  end
+                end
+                rulehash.n=#rulehash 
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+  expandlookups(sequences)
+  expandlookups(sublookups)
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-otl']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files",
+}
+local lower=string.lower
+local type,next,tonumber,tostring,unpack=type,next,tonumber,tostring,unpack
+local abs=math.abs
+local derivetable=table.derive
+local formatters=string.formatters
+local setmetatableindex=table.setmetatableindex
+local allocate=utilities.storage.allocate
+local registertracker=trackers.register
+local registerdirective=directives.register
+local starttiming=statistics.starttiming
+local stoptiming=statistics.stoptiming
+local elapsedtime=statistics.elapsedtime
+local findbinfile=resolvers.findbinfile
+local trace_loading=false registertracker("otf.loading",function(v) trace_loading=v end)
+local trace_features=false registertracker("otf.features",function(v) trace_features=v end)
+local trace_defining=false registertracker("fonts.defining",function(v) trace_defining=v end)
+local report_otf=logs.reporter("fonts","otf loading")
+local fonts=fonts
+local otf=fonts.handlers.otf
+otf.version=3.100 
+otf.cache=containers.define("fonts","otl",otf.version,true)
+otf.svgcache=containers.define("fonts","svg",otf.version,true)
+otf.sbixcache=containers.define("fonts","sbix",otf.version,true)
+otf.pdfcache=containers.define("fonts","pdf",otf.version,true)
+otf.svgenabled=false
+otf.sbixenabled=false
+local otfreaders=otf.readers
+local hashes=fonts.hashes
+local definers=fonts.definers
+local readers=fonts.readers
+local constructors=fonts.constructors
+local otffeatures=constructors.features.otf
+local registerotffeature=otffeatures.register
+local otfenhancers=constructors.enhancers.otf
+local registerotfenhancer=otfenhancers.register
+local forceload=false
+local cleanup=0   
+local syncspace=true
+local forcenotdef=false
+local privateoffset=fonts.constructors and fonts.constructors.privateoffset or 0xF0000 
+local applyruntimefixes=fonts.treatments and fonts.treatments.applyfixes
+local wildcard="*"
+local default="dflt"
+local formats=fonts.formats
+formats.otf="opentype"
+formats.ttf="truetype"
+formats.ttc="truetype"
+registerdirective("fonts.otf.loader.cleanup",function(v) cleanup=tonumber(v) or (v and 1) or 0 end)
+registerdirective("fonts.otf.loader.force",function(v) forceload=v end)
+registerdirective("fonts.otf.loader.syncspace",function(v) syncspace=v end)
+registerdirective("fonts.otf.loader.forcenotdef",function(v) forcenotdef=v end)
+registerotfenhancer("check extra features",function() end) 
+function otf.load(filename,sub,instance)
+  local base=file.basename(file.removesuffix(filename))
+  local name=file.removesuffix(base) 
+  local attr=lfs.attributes(filename)
+  local size=attr and attr.size or 0
+  local time=attr and attr.modification or 0
+  if sub=="" then
+    sub=false
+  end
+  local hash=name
+  if sub then
+    hash=hash.."-"..sub
+  end
+  if instance then
+    hash=hash.."-"..instance
+  end
+  hash=containers.cleanname(hash)
+  local data=containers.read(otf.cache,hash)
+  local reload=not data or data.size~=size or data.time~=time or data.tableversion~=otfreaders.tableversion
+  if forceload then
+    report_otf("forced reload of %a due to hard coded flag",filename)
+    reload=true
+  end
+   if reload then
+    report_otf("loading %a, hash %a",filename,hash)
+    starttiming(otfreaders)
+    data=otfreaders.loadfont(filename,sub or 1,instance) 
+    if data then
+      local resources=data.resources
+      local svgshapes=resources.svgshapes
+      local sbixshapes=resources.sbixshapes
+      if svgshapes then
+        resources.svgshapes=nil
+        if otf.svgenabled then
+          local timestamp=os.date()
+          containers.write(otf.svgcache,hash,{
+            svgshapes=svgshapes,
+            timestamp=timestamp,
+          })
+          data.properties.svg={
+            hash=hash,
+            timestamp=timestamp,
+          }
+        end
+      end
+      if sbixshapes then
+        resources.sbixshapes=nil
+        if otf.sbixenabled then
+          local timestamp=os.date()
+          containers.write(otf.sbixcache,hash,{
+            sbixshapes=sbixshapes,
+            timestamp=timestamp,
+          })
+          data.properties.sbix={
+            hash=hash,
+            timestamp=timestamp,
+          }
+        end
+      end
+      otfreaders.compact(data)
+      otfreaders.rehash(data,"unicodes")
+      otfreaders.addunicodetable(data)
+      otfreaders.extend(data)
+      otfreaders.pack(data)
+      report_otf("loading done")
+      report_otf("saving %a in cache",filename)
+      data=containers.write(otf.cache,hash,data)
+      if cleanup>1 then
+        collectgarbage("collect")
+      end
+      stoptiming(otfreaders)
+      if elapsedtime then
+        report_otf("loading, optimizing, packing and caching time %s",elapsedtime(otfreaders))
+      end
+      if cleanup>3 then
+        collectgarbage("collect")
+      end
+      data=containers.read(otf.cache,hash) 
+      if cleanup>2 then
+        collectgarbage("collect")
+      end
+    else
+      data=nil
+      report_otf("loading failed due to read error")
+    end
+  end
+  if data then
+    if trace_defining then
+      report_otf("loading from cache using hash %a",hash)
+    end
+    otfreaders.unpack(data)
+    otfreaders.expand(data) 
+    otfreaders.addunicodetable(data)
+    otfenhancers.apply(data,filename,data)
+    if applyruntimefixes then
+      applyruntimefixes(filename,data) 
+    end
+    data.metadata.math=data.resources.mathconstants
+    local classes=data.resources.classes
+    if not classes then
+      local descriptions=data.descriptions
+      classes=setmetatableindex(function(t,k)
+        local d=descriptions[k]
+        local v=(d and d.class or "base") or false
+        t[k]=v
+        return v
+      end)
+      data.resources.classes=classes
+    end
+  end
+  return data
+end
+function otf.setfeatures(tfmdata,features)
+  local okay=constructors.initializefeatures("otf",tfmdata,features,trace_features,report_otf)
+  if okay then
+    return constructors.collectprocessors("otf",tfmdata,features,trace_features,report_otf)
+  else
+    return {} 
+  end
+end
+local function copytotfm(data,cache_id)
+  if data then
+    local metadata=data.metadata
+    local properties=derivetable(data.properties)
+    local descriptions=derivetable(data.descriptions)
+    local goodies=derivetable(data.goodies)
+    local characters={}
+    local parameters={}
+    local mathparameters={}
+    local resources=data.resources
+    local unicodes=resources.unicodes
+    local spaceunits=500
+    local spacer="space"
+    local designsize=metadata.designsize or 100
+    local minsize=metadata.minsize or designsize
+    local maxsize=metadata.maxsize or designsize
+    local mathspecs=metadata.math
+    if designsize==0 then
+      designsize=100
+      minsize=100
+      maxsize=100
+    end
+    if mathspecs then
+      for name,value in next,mathspecs do
+        mathparameters[name]=value
+      end
+    end
+    for unicode in next,data.descriptions do 
+      characters[unicode]={}
+    end
+    if mathspecs then
+      for unicode,character in next,characters do
+        local d=descriptions[unicode] 
+        local m=d.math
+        if m then
+          local italic=m.italic
+          local vitalic=m.vitalic
+          local variants=m.hvariants
+          local parts=m.hparts
+          if variants then
+            local c=character
+            for i=1,#variants do
+              local un=variants[i]
+              c.next=un
+              c=characters[un]
+            end 
+            c.horiz_variants=parts
+          elseif parts then
+            character.horiz_variants=parts
+            italic=m.hitalic
+          end
+          local variants=m.vvariants
+          local parts=m.vparts
+          if variants then
+            local c=character
+            for i=1,#variants do
+              local un=variants[i]
+              c.next=un
+              c=characters[un]
+            end 
+            c.vert_variants=parts
+          elseif parts then
+            character.vert_variants=parts
+          end
+          if italic and italic~=0 then
+            character.italic=italic
+          end
+          if vitalic and vitalic~=0 then
+            character.vert_italic=vitalic
+          end
+          local accent=m.accent 
+          if accent then
+            character.accent=accent
+          end
+          local kerns=m.kerns
+          if kerns then
+            character.mathkerns=kerns
+          end
+        end
+      end
+    end
+    local filename=constructors.checkedfilename(resources)
+    local fontname=metadata.fontname
+    local fullname=metadata.fullname or fontname
+    local psname=fontname or fullname
+    local units=metadata.units or 1000
+    if units==0 then 
+      units=1000 
+      metadata.units=1000
+      report_otf("changing %a units to %a",0,units)
+    end
+    local monospaced=metadata.monospaced
+    local charwidth=metadata.averagewidth 
+    local charxheight=metadata.xheight 
+    local italicangle=metadata.italicangle
+    local hasitalics=metadata.hasitalics
+    properties.monospaced=monospaced
+    properties.hasitalics=hasitalics
+    parameters.italicangle=italicangle
+    parameters.charwidth=charwidth
+    parameters.charxheight=charxheight
+    local space=0x0020
+    local emdash=0x2014
+    if monospaced then
+      if descriptions[space] then
+        spaceunits,spacer=descriptions[space].width,"space"
+      end
+      if not spaceunits and descriptions[emdash] then
+        spaceunits,spacer=descriptions[emdash].width,"emdash"
+      end
+      if not spaceunits and charwidth then
+        spaceunits,spacer=charwidth,"charwidth"
+      end
+    else
+      if descriptions[space] then
+        spaceunits,spacer=descriptions[space].width,"space"
+      end
+      if not spaceunits and descriptions[emdash] then
+        spaceunits,spacer=descriptions[emdash].width/2,"emdash/2"
+      end
+      if not spaceunits and charwidth then
+        spaceunits,spacer=charwidth,"charwidth"
+      end
+    end
+    spaceunits=tonumber(spaceunits) or units/2
+    parameters.slant=0
+    parameters.space=spaceunits      
+    parameters.space_stretch=1*units/2  
+    parameters.space_shrink=1*units/3  
+    parameters.x_height=2*units/5  
+    parameters.quad=units    
+    if spaceunits<2*units/5 then
+    end
+    if italicangle and italicangle~=0 then
+      parameters.italicangle=italicangle
+      parameters.italicfactor=math.cos(math.rad(90+italicangle))
+      parameters.slant=- math.tan(italicangle*math.pi/180)
+    end
+    if monospaced then
+      parameters.space_stretch=0
+      parameters.space_shrink=0
+    elseif syncspace then 
+      parameters.space_stretch=spaceunits/2
+      parameters.space_shrink=spaceunits/3
+    end
+    parameters.extra_space=parameters.space_shrink 
+    if charxheight then
+      parameters.x_height=charxheight
+    else
+      local x=0x0078
+      if x then
+        local x=descriptions[x]
+        if x then
+          parameters.x_height=x.height
+        end
+      end
+    end
+    parameters.designsize=(designsize/10)*65536
+    parameters.minsize=(minsize/10)*65536
+    parameters.maxsize=(maxsize/10)*65536
+    parameters.ascender=abs(metadata.ascender or 0)
+    parameters.descender=abs(metadata.descender or 0)
+    parameters.units=units
+    properties.space=spacer
+    properties.encodingbytes=2
+    properties.format=data.format or formats.otf
+    properties.noglyphnames=true
+    properties.filename=filename
+    properties.fontname=fontname
+    properties.fullname=fullname
+    properties.psname=psname
+    properties.name=filename or fullname
+    properties.private=properties.private or data.private or privateoffset
+    return {
+      characters=characters,
+      descriptions=descriptions,
+      parameters=parameters,
+      mathparameters=mathparameters,
+      resources=resources,
+      properties=properties,
+      goodies=goodies,
+    }
+  end
+end
+local converters={
+  woff={
+    cachename="webfonts",
+    action=otf.readers.woff2otf,
+  }
+}
+local function checkconversion(specification)
+  local filename=specification.filename
+  local converter=converters[lower(file.suffix(filename))]
+  if converter then
+    local base=file.basename(filename)
+    local name=file.removesuffix(base)
+    local attr=lfs.attributes(filename)
+    local size=attr and attr.size or 0
+    local time=attr and attr.modification or 0
+    if size>0 then
+      local cleanname=containers.cleanname(name)
+      local cachename=caches.setfirstwritablefile(cleanname,converter.cachename)
+      if not io.exists(cachename) or (time~=lfs.attributes(cachename).modification) then
+        report_otf("caching font %a in %a",filename,cachename)
+        converter.action(filename,cachename) 
+        lfs.touch(cachename,time,time)
+      end
+      specification.filename=cachename
+    end
+  end
+end
+local function otftotfm(specification)
+  local cache_id=specification.hash
+  local tfmdata=containers.read(constructors.cache,cache_id)
+  if not tfmdata then
+    checkconversion(specification) 
+    local name=specification.name
+    local sub=specification.sub
+    local subindex=specification.subindex
+    local filename=specification.filename
+    local features=specification.features.normal
+    local instance=specification.instance or (features and features.axis)
+    local rawdata=otf.load(filename,sub,instance)
+    if rawdata and next(rawdata) then
+      local descriptions=rawdata.descriptions
+      rawdata.lookuphash={} 
+      tfmdata=copytotfm(rawdata,cache_id)
+      if tfmdata and next(tfmdata) then
+        local features=constructors.checkedfeatures("otf",features)
+        local shared=tfmdata.shared
+        if not shared then
+          shared={}
+          tfmdata.shared=shared
+        end
+        shared.rawdata=rawdata
+        shared.dynamics={}
+        tfmdata.changed={}
+        shared.features=features
+        shared.processes=otf.setfeatures(tfmdata,features)
+      end
+    end
+    containers.write(constructors.cache,cache_id,tfmdata)
+  end
+  return tfmdata
+end
+local function read_from_otf(specification)
+  local tfmdata=otftotfm(specification)
+  if tfmdata then
+    tfmdata.properties.name=specification.name
+    tfmdata.properties.sub=specification.sub
+    tfmdata=constructors.scale(tfmdata,specification)
+    local allfeatures=tfmdata.shared.features or specification.features.normal
+    constructors.applymanipulators("otf",tfmdata,allfeatures,trace_features,report_otf)
+    constructors.setname(tfmdata,specification) 
+    fonts.loggers.register(tfmdata,file.suffix(specification.filename),specification)
+  end
+  return tfmdata
+end
+local function checkmathsize(tfmdata,mathsize)
+  local mathdata=tfmdata.shared.rawdata.metadata.math
+  local mathsize=tonumber(mathsize)
+  if mathdata then 
+    local parameters=tfmdata.parameters
+    parameters.scriptpercentage=mathdata.ScriptPercentScaleDown
+    parameters.scriptscriptpercentage=mathdata.ScriptScriptPercentScaleDown
+    parameters.mathsize=mathsize 
+  end
+end
+registerotffeature {
+  name="mathsize",
+  description="apply mathsize specified in the font",
+  initializers={
+    base=checkmathsize,
+    node=checkmathsize,
+  }
+}
+function otf.collectlookups(rawdata,kind,script,language)
+  if not kind then
+    return
+  end
+  if not script then
+    script=default
+  end
+  if not language then
+    language=default
+  end
+  local lookupcache=rawdata.lookupcache
+  if not lookupcache then
+    lookupcache={}
+    rawdata.lookupcache=lookupcache
+  end
+  local kindlookup=lookupcache[kind]
+  if not kindlookup then
+    kindlookup={}
+    lookupcache[kind]=kindlookup
+  end
+  local scriptlookup=kindlookup[script]
+  if not scriptlookup then
+    scriptlookup={}
+    kindlookup[script]=scriptlookup
+  end
+  local languagelookup=scriptlookup[language]
+  if not languagelookup then
+    local sequences=rawdata.resources.sequences
+    local featuremap={}
+    local featurelist={}
+    if sequences then
+      for s=1,#sequences do
+        local sequence=sequences[s]
+        local features=sequence.features
+        if features then
+          features=features[kind]
+          if features then
+            features=features[script] or features[wildcard]
+            if features then
+              features=features[language] or features[wildcard]
+              if features then
+                if not featuremap[sequence] then
+                  featuremap[sequence]=true
+                  featurelist[#featurelist+1]=sequence
+                end
+              end
+            end
+          end
+        end
+      end
+      if #featurelist==0 then
+        featuremap,featurelist=false,false
+      end
+    else
+      featuremap,featurelist=false,false
+    end
+    languagelookup={ featuremap,featurelist }
+    scriptlookup[language]=languagelookup
+  end
+  return unpack(languagelookup)
+end
+local function getgsub(tfmdata,k,kind,value)
+  local shared=tfmdata.shared
+  local rawdata=shared and shared.rawdata
+  if rawdata then
+    local sequences=rawdata.resources.sequences
+    if sequences then
+      local properties=tfmdata.properties
+      local validlookups,lookuplist=otf.collectlookups(rawdata,kind,properties.script,properties.language)
+      if validlookups then
+        for i=1,#lookuplist do
+          local lookup=lookuplist[i]
+          local steps=lookup.steps
+          local nofsteps=lookup.nofsteps
+          for i=1,nofsteps do
+            local coverage=steps[i].coverage
+            if coverage then
+              local found=coverage[k]
+              if found then
+                return found,lookup.type
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+end
+otf.getgsub=getgsub 
+function otf.getsubstitution(tfmdata,k,kind,value)
+  local found,kind=getgsub(tfmdata,k,kind,value)
+  if not found then
+  elseif kind=="gsub_single" then
+    return found
+  elseif kind=="gsub_alternate" then
+    local choice=tonumber(value) or 1 
+    return found[choice] or found[1] or k
+  end
+  return k
+end
+otf.getalternate=otf.getsubstitution
+function otf.getmultiple(tfmdata,k,kind)
+  local found,kind=getgsub(tfmdata,k,kind)
+  if found and kind=="gsub_multiple" then
+    return found
+  end
+  return { k }
+end
+function otf.getkern(tfmdata,left,right,kind)
+  local kerns=getgsub(tfmdata,left,kind or "kern",true) 
+  if kerns then
+    local found=kerns[right]
+    local kind=type(found)
+    if kind=="table" then
+      found=found[1][3] 
+    elseif kind~="number" then
+      found=false
+    end
+    if found then
+      return found*tfmdata.parameters.factor
+    end
+  end
+  return 0
+end
+local function check_otf(forced,specification,suffix)
+  local name=specification.name
+  if forced then
+    name=specification.forcedname 
+  end
+  local fullname=findbinfile(name,suffix) or ""
+  if fullname=="" then
+    fullname=fonts.names.getfilename(name,suffix) or ""
+  end
+  if fullname~="" and not fonts.names.ignoredfile(fullname) then
+    specification.filename=fullname
+    return read_from_otf(specification)
+  end
+end
+local function opentypereader(specification,suffix)
+  local forced=specification.forced or ""
+  if formats[forced] then
+    return check_otf(true,specification,forced)
+  else
+    return check_otf(false,specification,suffix)
+  end
+end
+readers.opentype=opentypereader 
+function readers.otf(specification) return opentypereader(specification,"otf") end
+function readers.ttf(specification) return opentypereader(specification,"ttf") end
+function readers.ttc(specification) return opentypereader(specification,"ttf") end
+function readers.woff(specification)
+  checkconversion(specification)
+  opentypereader(specification,"")
+end
+function otf.scriptandlanguage(tfmdata,attr)
+  local properties=tfmdata.properties
+  return properties.script or "dflt",properties.language or "dflt"
+end
+local function justset(coverage,unicode,replacement)
+  coverage[unicode]=replacement
+end
+otf.coverup={
+  stepkey="steps",
+  actions={
+    chainsubstitution=justset,
+    chainposition=justset,
+    substitution=justset,
+    alternate=justset,
+    multiple=justset,
+    kern=justset,
+    pair=justset,
+    single=justset,
+    ligature=function(coverage,unicode,ligature)
+      local first=ligature[1]
+      local tree=coverage[first]
+      if not tree then
+        tree={}
+        coverage[first]=tree
+      end
+      for i=2,#ligature do
+        local l=ligature[i]
+        local t=tree[l]
+        if not t then
+          t={}
+          tree[l]=t
+        end
+        tree=t
+      end
+      tree.ligature=unicode
+    end,
+  },
+  register=function(coverage,featuretype,format)
+    return {
+      format=format,
+      coverage=coverage,
+    }
+  end
+}
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-oto']={ 
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local concat,unpack=table.concat,table.unpack
+local insert,remove=table.insert,table.remove
+local format,gmatch,gsub,find,match,lower,strip=string.format,string.gmatch,string.gsub,string.find,string.match,string.lower,string.strip
+local type,next,tonumber,tostring,rawget=type,next,tonumber,tostring,rawget
+local trace_baseinit=false trackers.register("otf.baseinit",function(v) trace_baseinit=v end)
+local trace_singles=false trackers.register("otf.singles",function(v) trace_singles=v end)
+local trace_multiples=false trackers.register("otf.multiples",function(v) trace_multiples=v end)
+local trace_alternatives=false trackers.register("otf.alternatives",function(v) trace_alternatives=v end)
+local trace_ligatures=false trackers.register("otf.ligatures",function(v) trace_ligatures=v end)
+local trace_kerns=false trackers.register("otf.kerns",function(v) trace_kerns=v end)
+local trace_preparing=false trackers.register("otf.preparing",function(v) trace_preparing=v end)
+local report_prepare=logs.reporter("fonts","otf prepare")
+local fonts=fonts
+local otf=fonts.handlers.otf
+local otffeatures=otf.features
+local registerotffeature=otffeatures.register
+otf.defaultbasealternate="none" 
+local getprivate=fonts.constructors.getprivate
+local wildcard="*"
+local default="dflt"
+local formatters=string.formatters
+local f_unicode=formatters["%U"]
+local f_uniname=formatters["%U (%s)"]
+local f_unilist=formatters["% t (% t)"]
+local function gref(descriptions,n)
+  if type(n)=="number" then
+    local name=descriptions[n].name
+    if name then
+      return f_uniname(n,name)
+    else
+      return f_unicode(n)
+    end
+  elseif n then
+    local num,nam,j={},{},0
+    for i=1,#n do
+      local ni=n[i]
+      if tonumber(ni) then 
+        j=j+1
+        local di=descriptions[ni]
+        num[j]=f_unicode(ni)
+        nam[j]=di and di.name or "-"
+      end
+    end
+    return f_unilist(num,nam)
+  else
+    return "<error in base mode tracing>"
+  end
+end
+local function cref(feature,sequence)
+  return formatters["feature %a, type %a, chain lookup %a"](feature,sequence.type,sequence.name)
+end
+local function report_substitution(feature,sequence,descriptions,unicode,substitution)
+  if unicode==substitution then
+    report_prepare("%s: base substitution %s maps onto itself",
+      cref(feature,sequence),
+      gref(descriptions,unicode))
+  else
+    report_prepare("%s: base substitution %s => %S",
+      cref(feature,sequence),
+      gref(descriptions,unicode),
+      gref(descriptions,substitution))
+  end
+end
+local function report_alternate(feature,sequence,descriptions,unicode,replacement,value,comment)
+  if unicode==replacement then
+    report_prepare("%s: base alternate %s maps onto itself",
+      cref(feature,sequence),
+      gref(descriptions,unicode))
+  else
+    report_prepare("%s: base alternate %s => %s (%S => %S)",
+      cref(feature,sequence),
+      gref(descriptions,unicode),
+      replacement and gref(descriptions,replacement),
+      value,
+      comment)
+  end
+end
+local function report_ligature(feature,sequence,descriptions,unicode,ligature)
+  report_prepare("%s: base ligature %s => %S",
+    cref(feature,sequence),
+    gref(descriptions,ligature),
+    gref(descriptions,unicode))
+end
+local function report_kern(feature,sequence,descriptions,unicode,otherunicode,value)
+  report_prepare("%s: base kern %s + %s => %S",
+    cref(feature,sequence),
+    gref(descriptions,unicode),
+    gref(descriptions,otherunicode),
+    value)
+end
+local basehash,basehashes,applied={},1,{}
+local function registerbasehash(tfmdata)
+  local properties=tfmdata.properties
+  local hash=concat(applied," ")
+  local base=basehash[hash]
+  if not base then
+    basehashes=basehashes+1
+    base=basehashes
+    basehash[hash]=base
+  end
+  properties.basehash=base
+  properties.fullname=(properties.fullname or properties.name).."-"..base
+  applied={}
+end
+local function registerbasefeature(feature,value)
+  applied[#applied+1]=feature.."="..tostring(value)
+end
+local function makefake(tfmdata,name,present)
+  local private=getprivate(tfmdata)
+  local character={ intermediate=true,ligatures={} }
+  resources.unicodes[name]=private
+  tfmdata.characters[private]=character
+  tfmdata.descriptions[private]={ name=name }
+  present[name]=private
+  return character
+end
+local function make_1(present,tree,name)
+  for k,v in next,tree do
+    if k=="ligature" then
+      present[name]=v
+    else
+      make_1(present,v,name.."_"..k)
+    end
+  end
+end
+local function make_2(present,tfmdata,characters,tree,name,preceding,unicode,done)
+  for k,v in next,tree do
+    if k=="ligature" then
+      local character=characters[preceding]
+      if not character then
+        if trace_baseinit then
+          report_prepare("weird ligature in lookup %a, current %C, preceding %C",sequence.name,v,preceding)
+        end
+        character=makefake(tfmdata,name,present)
+      end
+      local ligatures=character.ligatures
+      if ligatures then
+        ligatures[unicode]={ char=v }
+      else
+        character.ligatures={ [unicode]={ char=v } }
+      end
+      if done then
+        local d=done[name]
+        if not d then
+          done[name]={ "dummy",v }
+        else
+          d[#d+1]=v
+        end
+      end
+    else
+      local code=present[name] or unicode
+      local name=name.."_"..k
+      make_2(present,tfmdata,characters,v,name,code,k,done)
+    end
+  end
+end
+local function preparesubstitutions(tfmdata,feature,value,validlookups,lookuplist)
+  local characters=tfmdata.characters
+  local descriptions=tfmdata.descriptions
+  local resources=tfmdata.resources
+  local changed=tfmdata.changed
+  local ligatures={}
+  local alternate=tonumber(value) or true and 1
+  local defaultalt=otf.defaultbasealternate
+  local trace_singles=trace_baseinit and trace_singles
+  local trace_alternatives=trace_baseinit and trace_alternatives
+  local trace_ligatures=trace_baseinit and trace_ligatures
+  if not changed then
+    changed={}
+    tfmdata.changed=changed
+  end
+  for i=1,#lookuplist do
+    local sequence=lookuplist[i]
+    local steps=sequence.steps
+    local kind=sequence.type
+    if kind=="gsub_single" then
+      for i=1,#steps do
+        for unicode,data in next,steps[i].coverage do
+          if unicode~=data then
+            changed[unicode]=data
+          end
+          if trace_singles then
+            report_substitution(feature,sequence,descriptions,unicode,data)
+          end
+        end
+      end
+    elseif kind=="gsub_alternate" then
+      for i=1,#steps do
+        for unicode,data in next,steps[i].coverage do
+          local replacement=data[alternate]
+          if replacement then
+            if unicode~=replacement then
+              changed[unicode]=replacement
+            end
+            if trace_alternatives then
+              report_alternate(feature,sequence,descriptions,unicode,replacement,value,"normal")
+            end
+          elseif defaultalt=="first" then
+            replacement=data[1]
+            if unicode~=replacement then
+              changed[unicode]=replacement
+            end
+            if trace_alternatives then
+              report_alternate(feature,sequence,descriptions,unicode,replacement,value,defaultalt)
+            end
+          elseif defaultalt=="last" then
+            replacement=data[#data]
+            if unicode~=replacement then
+              changed[unicode]=replacement
+            end
+            if trace_alternatives then
+              report_alternate(feature,sequence,descriptions,unicode,replacement,value,defaultalt)
+            end
+          else
+            if trace_alternatives then
+              report_alternate(feature,sequence,descriptions,unicode,replacement,value,"unknown")
+            end
+          end
+        end
+      end
+    elseif kind=="gsub_ligature" then
+      for i=1,#steps do
+        for unicode,data in next,steps[i].coverage do
+          ligatures[#ligatures+1]={ unicode,data,"" } 
+          if trace_ligatures then
+            report_ligature(feature,sequence,descriptions,unicode,data)
+          end
+        end
+      end
+    end
+  end
+  local nofligatures=#ligatures
+  if nofligatures>0 then
+    local characters=tfmdata.characters
+    local present={}
+    local done=trace_baseinit and trace_ligatures and {}
+    for i=1,nofligatures do
+      local ligature=ligatures[i]
+      local unicode,tree=ligature[1],ligature[2]
+      make_1(present,tree,"ctx_"..unicode)
+    end
+    for i=1,nofligatures do
+      local ligature=ligatures[i]
+      local unicode,tree,lookupname=ligature[1],ligature[2],ligature[3]
+      make_2(present,tfmdata,characters,tree,"ctx_"..unicode,unicode,unicode,done,sequence)
+    end
+  end
+end
+local function preparepositionings(tfmdata,feature,value,validlookups,lookuplist)
+  local characters=tfmdata.characters
+  local descriptions=tfmdata.descriptions
+  local resources=tfmdata.resources
+  local properties=tfmdata.properties
+  local traceindeed=trace_baseinit and trace_kerns
+  for i=1,#lookuplist do
+    local sequence=lookuplist[i]
+    local steps=sequence.steps
+    local kind=sequence.type
+    local format=sequence.format
+    if kind=="gpos_pair" then
+      for i=1,#steps do
+        local step=steps[i]
+        local format=step.format
+        if format=="kern" or format=="move" then
+          for unicode,data in next,steps[i].coverage do
+            local character=characters[unicode]
+            local kerns=character.kerns
+            if not kerns then
+              kerns={}
+              character.kerns=kerns
+            end
+            if traceindeed then
+              for otherunicode,kern in next,data do
+                if not kerns[otherunicode] and kern~=0 then
+                  kerns[otherunicode]=kern
+                  report_kern(feature,sequence,descriptions,unicode,otherunicode,kern)
+                end
+              end
+            else
+              for otherunicode,kern in next,data do
+                if not kerns[otherunicode] and kern~=0 then
+                  kerns[otherunicode]=kern
+                end
+              end
+            end
+          end
+        else
+          for unicode,data in next,steps[i].coverage do
+            local character=characters[unicode]
+            local kerns=character.kerns
+            for otherunicode,kern in next,data do
+              local other=kern[2]
+              if other==true or (not other and not (kerns and kerns[otherunicode])) then
+                local kern=kern[1]
+                if kern==true then
+                elseif kern[1]~=0 or kern[2]~=0 or kern[4]~=0 then
+                else
+                  kern=kern[3]
+                  if kern~=0 then
+                    if kerns then
+                      kerns[otherunicode]=kern
+                    else
+                      kerns={ [otherunicode]=kern }
+                      character.kerns=kerns
+                    end
+                    if traceindeed then
+                      report_kern(feature,sequence,descriptions,unicode,otherunicode,kern)
+                    end
+                  end
+                end
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+end
+local function initializehashes(tfmdata)
+end
+local function checkmathreplacements(tfmdata,fullname)
+  if tfmdata.mathparameters then
+    local characters=tfmdata.characters
+    local changed=tfmdata.changed
+    if next(changed) then
+      if trace_preparing or trace_baseinit then
+        report_prepare("checking math replacements for %a",fullname)
+      end
+      for unicode,replacement in next,changed do
+        local u=characters[unicode]
+        local r=characters[replacement]
+        local n=u.next
+        local v=u.vert_variants
+        local h=u.horiz_variants
+        if n and not r.next then
+          if trace_preparing then
+            report_prepare("forcing %s for %C substituted by %U","incremental step",unicode,replacement)
+          end
+          r.next=n
+        end
+        if v and not r.vert_variants then
+          if trace_preparing then
+            report_prepare("forcing %s for %C substituted by %U","vertical variants",unicode,replacement)
+          end
+          r.vert_variants=v
+        end
+        if h and not r.horiz_variants then
+          if trace_preparing then
+            report_prepare("forcing %s for %C substituted by %U","horizontal variants",unicode,replacement)
+          end
+          r.horiz_variants=h
+        end
+      end
+    end
+  end
+end
+local function featuresinitializer(tfmdata,value)
+  if true then 
+    local starttime=trace_preparing and os.clock()
+    local features=tfmdata.shared.features
+    local fullname=tfmdata.properties.fullname or "?"
+    if features then
+      initializehashes(tfmdata)
+      local collectlookups=otf.collectlookups
+      local rawdata=tfmdata.shared.rawdata
+      local properties=tfmdata.properties
+      local script=properties.script
+      local language=properties.language
+      local rawresources=rawdata.resources
+      local rawfeatures=rawresources and rawresources.features
+      local basesubstitutions=rawfeatures and rawfeatures.gsub
+      local basepositionings=rawfeatures and rawfeatures.gpos
+      local substitutionsdone=false
+      local positioningsdone=false
+      if basesubstitutions or basepositionings then
+        local sequences=tfmdata.resources.sequences
+        for s=1,#sequences do
+          local sequence=sequences[s]
+          local sfeatures=sequence.features
+          if sfeatures then
+            local order=sequence.order
+            if order then
+              for i=1,#order do 
+                local feature=order[i]
+                local value=features[feature]
+                if value then
+                  local validlookups,lookuplist=collectlookups(rawdata,feature,script,language)
+                  if not validlookups then
+                  elseif basesubstitutions and basesubstitutions[feature] then
+                    if trace_preparing then
+                      report_prepare("filtering base %s feature %a for %a with value %a","sub",feature,fullname,value)
+                    end
+                    preparesubstitutions(tfmdata,feature,value,validlookups,lookuplist)
+                    registerbasefeature(feature,value)
+                    substitutionsdone=true
+                  elseif basepositionings and basepositionings[feature] then
+                    if trace_preparing then
+                      report_prepare("filtering base %a feature %a for %a with value %a","pos",feature,fullname,value)
+                    end
+                    preparepositionings(tfmdata,feature,value,validlookups,lookuplist)
+                    registerbasefeature(feature,value)
+                    positioningsdone=true
+                  end
+                end
+              end
+            end
+          end
+        end
+      end
+      if substitutionsdone then
+        checkmathreplacements(tfmdata,fullname)
+      end
+      registerbasehash(tfmdata)
+    end
+    if trace_preparing then
+      report_prepare("preparation time is %0.3f seconds for %a",os.clock()-starttime,fullname)
+    end
+  end
+end
+registerotffeature {
+  name="features",
+  description="features",
+  default=true,
+  initializers={
+    base=featuresinitializer,
+  }
+}
+otf.basemodeinitializer=featuresinitializer
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-otj']={
+  version=1.001,
+  comment="companion to font-lib.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files",
+}
+if not nodes.properties then return end
+local next,rawget,tonumber=next,rawget,tonumber
+local fastcopy=table.fastcopy
+local registertracker=trackers.register
+local trace_injections=false registertracker("fonts.injections",function(v) trace_injections=v end)
+local trace_marks=false registertracker("fonts.injections.marks",function(v) trace_marks=v end)
+local trace_cursive=false registertracker("fonts.injections.cursive",function(v) trace_cursive=v end)
+local trace_spaces=false registertracker("fonts.injections.spaces",function(v) trace_spaces=v end)
+local report_injections=logs.reporter("fonts","injections")
+local report_spaces=logs.reporter("fonts","spaces")
+local attributes,nodes,node=attributes,nodes,node
+fonts=fonts
+local hashes=fonts.hashes
+local fontdata=hashes.identifiers
+nodes.injections=nodes.injections or {}
+local injections=nodes.injections
+local tracers=nodes.tracers
+local setcolor=tracers and tracers.colors.set
+local resetcolor=tracers and tracers.colors.reset
+local nodecodes=nodes.nodecodes
+local glyph_code=nodecodes.glyph
+local disc_code=nodecodes.disc
+local kern_code=nodecodes.kern
+local glue_code=nodecodes.glue
+local nuts=nodes.nuts
+local nodepool=nuts.pool
+local tonode=nuts.tonode
+local tonut=nuts.tonut
+local getfield=nuts.getfield
+local setfield=nuts.setfield
+local getnext=nuts.getnext
+local getprev=nuts.getprev
+local getid=nuts.getid
+local getfont=nuts.getfont
+local getchar=nuts.getchar
+local getoffsets=nuts.getoffsets
+local getboth=nuts.getboth
+local getdisc=nuts.getdisc
+local setdisc=nuts.setdisc
+local setoffsets=nuts.setoffsets
+local ischar=nuts.is_char
+local getkern=nuts.getkern
+local setkern=nuts.setkern
+local setlink=nuts.setlink
+local setwidth=nuts.setwidth
+local getwidth=nuts.getwidth
+local traverse_id=nuts.traverse_id
+local traverse_char=nuts.traverse_char
+local insert_node_before=nuts.insert_before
+local insert_node_after=nuts.insert_after
+local properties=nodes.properties.data
+local fontkern=nuts.pool and nuts.pool.fontkern 
+do if not fontkern then 
+  local thekern=nuts.new("kern",0) 
+  local setkern=nuts.setkern
+  local copy_node=nuts.copy_node
+  fontkern=function(k)
+    local n=copy_node(thekern)
+    setkern(n,k)
+    return n
+  end
+end end
+function injections.installnewkern() end 
+local nofregisteredkerns=0
+local nofregisteredpositions=0
+local nofregisteredmarks=0
+local nofregisteredcursives=0
+local keepregisteredcounts=false
+function injections.keepcounts()
+  keepregisteredcounts=true
+end
+function injections.resetcounts()
+  nofregisteredkerns=0
+  nofregisteredpositions=0
+  nofregisteredmarks=0
+  nofregisteredcursives=0
+  keepregisteredcounts=false
+end
+function injections.reset(n)
+  local p=rawget(properties,n)
+  if p then
+    p.injections=false 
+  else
+    properties[n]=false 
+  end
+end
+function injections.copy(target,source)
+  local sp=rawget(properties,source)
+  if sp then
+    local tp=rawget(properties,target)
+    local si=sp.injections
+    if si then
+      si=fastcopy(si)
+      if tp then
+        tp.injections=si
+      else
+        properties[target]={
+          injections=si,
+        }
+      end
+    elseif tp then
+      tp.injections=false 
+    else
+      properties[target]={ injections={} }
+    end
+  else
+    local tp=rawget(properties,target)
+    if tp then
+      tp.injections=false 
+    else
+      properties[target]=false 
+    end
+  end
+end
+function injections.setligaindex(n,index)
+  local p=rawget(properties,n)
+  if p then
+    local i=p.injections
+    if i then
+      i.ligaindex=index
+    else
+      p.injections={
+        ligaindex=index
+      }
+    end
+  else
+    properties[n]={
+      injections={
+        ligaindex=index
+      }
+    }
+  end
+end
+function injections.getligaindex(n,default)
+  local p=rawget(properties,n)
+  if p then
+    local i=p.injections
+    if i then
+      return i.ligaindex or default
+    end
+  end
+  return default
+end
+function injections.setcursive(start,nxt,factor,rlmode,exit,entry,tfmstart,tfmnext) 
+  local dx=factor*(exit[1]-entry[1])
+  local dy=-factor*(exit[2]-entry[2])
+  local ws=tfmstart.width
+  local wn=tfmnext.width
+  nofregisteredcursives=nofregisteredcursives+1
+  if rlmode<0 then
+    dx=-(dx+wn)
+  else
+    dx=dx-ws
+  end
+  if dx==0 then
+    dx=0
+  end
+  local p=rawget(properties,start)
+  if p then
+    local i=p.injections
+    if i then
+      i.cursiveanchor=true
+    else
+      p.injections={
+        cursiveanchor=true,
+      }
+    end
+  else
+    properties[start]={
+      injections={
+        cursiveanchor=true,
+      },
+    }
+  end
+  local p=rawget(properties,nxt)
+  if p then
+    local i=p.injections
+    if i then
+      i.cursivex=dx
+      i.cursivey=dy
+    else
+      p.injections={
+        cursivex=dx,
+        cursivey=dy,
+      }
+    end
+  else
+    properties[nxt]={
+      injections={
+        cursivex=dx,
+        cursivey=dy,
+      },
+    }
+  end
+  return dx,dy,nofregisteredcursives
+end
+function injections.setposition(current,factor,rlmode,r2lflag,spec,injection) 
+  local x=factor*spec[1]
+  local y=factor*spec[2]
+  local w=factor*spec[3]
+  local h=factor*spec[4]
+  if x~=0 or w~=0 or y~=0 or h~=0 then 
+    local yoffset=y-h
+    local leftkern=x   
+    local rightkern=w-x 
+    if leftkern~=0 or rightkern~=0 or yoffset~=0 then
+      nofregisteredpositions=nofregisteredpositions+1
+      if rlmode and rlmode<0 then
+        leftkern,rightkern=rightkern,leftkern
+      end
+      if not injection then
+        injection="injections"
+      end
+      local p=rawget(properties,current)
+      if p then
+        local i=rawget(p,injection)
+        if i then
+          if leftkern~=0 then
+            i.leftkern=(i.leftkern or 0)+leftkern
+          end
+          if rightkern~=0 then
+            i.rightkern=(i.rightkern or 0)+rightkern
+          end
+          if yoffset~=0 then
+            i.yoffset=(i.yoffset or 0)+yoffset
+          end
+        elseif leftkern~=0 or rightkern~=0 then
+          p[injection]={
+            leftkern=leftkern,
+            rightkern=rightkern,
+            yoffset=yoffset,
+          }
+        else
+          p[injection]={
+            yoffset=yoffset,
+          }
+        end
+      elseif leftkern~=0 or rightkern~=0 then
+        properties[current]={
+          [injection]={
+            leftkern=leftkern,
+            rightkern=rightkern,
+            yoffset=yoffset,
+          },
+        }
+      else
+        properties[current]={
+          [injection]={
+            yoffset=yoffset,
+          },
+        }
+      end
+      return x,y,w,h,nofregisteredpositions
+     end
+  end
+  return x,y,w,h 
+end
+function injections.setkern(current,factor,rlmode,x,injection)
+  local dx=factor*x
+  if dx~=0 then
+    nofregisteredkerns=nofregisteredkerns+1
+    local p=rawget(properties,current)
+    if not injection then
+      injection="injections"
+    end
+    if rlmode and rlmode<0 then
+      if p then
+        local i=rawget(p,injection)
+        if i then
+          i.leftkern=dx+(i.leftkern or 0)
+        else
+          p[injection]={
+            leftkern=dx,
+          }
+        end
+      else
+        properties[current]={
+          [injection]={
+            leftkern=dx,
+          },
+        }
+      end
+    else
+      if p then
+        local i=rawget(p,injection)
+        if i then
+          i.leftkern=dx+(i.leftkern or 0)
+        else
+          p[injection]={
+            leftkern=dx,
+          }
+        end
+      else
+        properties[current]={
+          [injection]={
+            leftkern=dx,
+          },
+        }
+      end
+    end
+    return dx,nofregisteredkerns
+  else
+    return 0,0
+  end
+end
+function injections.setmove(current,factor,rlmode,x,injection)
+  local dx=factor*x
+  if dx~=0 then
+    nofregisteredkerns=nofregisteredkerns+1
+    local p=rawget(properties,current)
+    if not injection then
+      injection="injections"
+    end
+    if rlmode and rlmode<0 then
+      if p then
+        local i=rawget(p,injection)
+        if i then
+          i.leftkern=dx+(i.leftkern or 0)
+        else
+          p[injection]={
+            leftkern=dx,
+          }
+        end
+      else
+        properties[current]={
+          [injection]={
+            leftkern=dx,
+          },
+        }
+      end
+    else
+      if p then
+        local i=rawget(p,injection)
+        if i then
+          i.leftkern=dx+(i.leftkern or 0)
+        else
+          p[injection]={
+            leftkern=dx,
+          }
+        end
+      else
+        properties[current]={
+          [injection]={
+            leftkern=dx,
+          },
+        }
+      end
+    end
+    return dx,nofregisteredkerns
+  else
+    return 0,0
+  end
+end
+function injections.setmark(start,base,factor,rlmode,ba,ma,tfmbase,mkmk,checkmark) 
+  local dx,dy=factor*(ba[1]-ma[1]),factor*(ba[2]-ma[2])
+  nofregisteredmarks=nofregisteredmarks+1
+  if rlmode>=0 then
+    dx=tfmbase.width-dx 
+  end
+  local p=rawget(properties,start)
+  if p then
+    local i=p.injections
+    if i then
+      if i.markmark then
+      else
+        i.markx=dx
+        i.marky=dy
+        i.markdir=rlmode or 0
+        i.markbase=nofregisteredmarks
+        i.markbasenode=base
+        i.markmark=mkmk
+        i.checkmark=checkmark
+      end
+    else
+      p.injections={
+        markx=dx,
+        marky=dy,
+        markdir=rlmode or 0,
+        markbase=nofregisteredmarks,
+        markbasenode=base,
+        markmark=mkmk,
+        checkmark=checkmark,
+      }
+    end
+  else
+    properties[start]={
+      injections={
+        markx=dx,
+        marky=dy,
+        markdir=rlmode or 0,
+        markbase=nofregisteredmarks,
+        markbasenode=base,
+        markmark=mkmk,
+        checkmark=checkmark,
+      },
+    }
+  end
+  return dx,dy,nofregisteredmarks
+end
+local function dir(n)
+  return (n and n<0 and "r-to-l") or (n and n>0 and "l-to-r") or "unset"
+end
+local function showchar(n,nested)
+  local char=getchar(n)
+  report_injections("%wfont %s, char %U, glyph %c",nested and 2 or 0,getfont(n),char,char)
+end
+local function show(n,what,nested,symbol)
+  if n then
+    local p=rawget(properties,n)
+    if p then
+      local i=rawget(p,what)
+      if i then
+        local leftkern=i.leftkern or 0
+        local rightkern=i.rightkern or 0
+        local yoffset=i.yoffset  or 0
+        local markx=i.markx   or 0
+        local marky=i.marky   or 0
+        local markdir=i.markdir  or 0
+        local markbase=i.markbase or 0
+        local cursivex=i.cursivex or 0
+        local cursivey=i.cursivey or 0
+        local ligaindex=i.ligaindex or 0
+        local cursbase=i.cursiveanchor
+        local margin=nested and 4 or 2
+        if rightkern~=0 or yoffset~=0 then
+          report_injections("%w%s pair: lx %p, rx %p, dy %p",margin,symbol,leftkern,rightkern,yoffset)
+        elseif leftkern~=0 then
+          report_injections("%w%s kern: dx %p",margin,symbol,leftkern)
+        end
+        if markx~=0 or marky~=0 or markbase~=0 then
+          report_injections("%w%s mark: dx %p, dy %p, dir %s, base %s",margin,symbol,markx,marky,markdir,markbase~=0 and "yes" or "no")
+        end
+        if cursivex~=0 or cursivey~=0 then
+          if cursbase then
+            report_injections("%w%s curs: base dx %p, dy %p",margin,symbol,cursivex,cursivey)
+          else
+            report_injections("%w%s curs: dx %p, dy %p",margin,symbol,cursivex,cursivey)
+          end
+        elseif cursbase then
+          report_injections("%w%s curs: base",margin,symbol)
+        end
+        if ligaindex~=0 then
+          report_injections("%w%s liga: index %i",margin,symbol,ligaindex)
+        end
+      end
+    end
+  end
+end
+local function showsub(n,what,where)
+  report_injections("begin subrun: %s",where)
+  for n in traverse_char(n) do
+    showchar(n,where)
+    show(n,what,where," ")
+  end
+  report_injections("end subrun")
+end
+local function trace(head,where)
+  report_injections()
+  report_injections("begin run %s: %s kerns, %s positions, %s marks and %s cursives registered",
+    where or "",nofregisteredkerns,nofregisteredpositions,nofregisteredmarks,nofregisteredcursives)
+  local n=head
+  while n do
+    local id=getid(n)
+    if id==glyph_code then
+      showchar(n)
+      show(n,"injections",false," ")
+      show(n,"preinjections",false,"<")
+      show(n,"postinjections",false,">")
+      show(n,"replaceinjections",false,"=")
+      show(n,"emptyinjections",false,"*")
+    elseif id==disc_code then
+      local pre,post,replace=getdisc(n)
+      if pre then
+        showsub(pre,"preinjections","pre")
+      end
+      if post then
+        showsub(post,"postinjections","post")
+      end
+      if replace then
+        showsub(replace,"replaceinjections","replace")
+      end
+      show(n,"emptyinjections",false,"*")
+    end
+    n=getnext(n)
+  end
+  report_injections("end run")
+end
+local function show_result(head)
+  local current=head
+  local skipping=false
+  while current do
+    local id=getid(current)
+    if id==glyph_code then
+      local w=getwidth(current)
+      local x,y=getoffsets(current)
+      report_injections("char: %C, width %p, xoffset %p, yoffset %p",getchar(current),w,x,y)
+      skipping=false
+    elseif id==kern_code then
+      report_injections("kern: %p",getkern(current))
+      skipping=false
+    elseif not skipping then
+      report_injections()
+      skipping=true
+    end
+    current=getnext(current)
+  end
+  report_injections()
+end
+local function inject_kerns_only(head,where)
+  head=tonut(head)
+  if trace_injections then
+    trace(head,"kerns")
+  end
+  local current=head
+  local prev=nil
+  local next=nil
+  local prevdisc=nil
+  local pre=nil 
+  local post=nil 
+  local replace=nil 
+  local pretail=nil 
+  local posttail=nil 
+  local replacetail=nil 
+  while current do
+    local next=getnext(current)
+    local char,id=ischar(current)
+    if char then
+      local p=rawget(properties,current)
+      if p then
+        local i=p.injections
+        if i then
+          local leftkern=i.leftkern
+          if leftkern and leftkern~=0 then
+            head=insert_node_before(head,current,fontkern(leftkern))
+          end
+        end
+        if prevdisc then
+          local done=false
+          if post then
+            local i=p.postinjections
+            if i then
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                setlink(posttail,fontkern(leftkern))
+                done=true
+              end
+            end
+          end
+          if replace then
+            local i=p.replaceinjections
+            if i then
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                setlink(replacetail,fontkern(leftkern))
+                done=true
+              end
+            end
+          else
+            local i=p.emptyinjections
+            if i then
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                setfield(prev,"replace",fontkern(leftkern)) 
+              end
+            end
+          end
+          if done then
+            setdisc(prevdisc,pre,post,replace)
+          end
+        end
+      end
+      prevdisc=nil
+    elseif char==false then
+      prevdisc=nil
+    elseif id==disc_code then
+      pre,post,replace,pretail,posttail,replacetail=getdisc(current,true)
+      local done=false
+      if pre then
+        for n in traverse_char(pre) do
+          local p=rawget(properties,n)
+          if p then
+            local i=p.injections or p.preinjections
+            if i then
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                pre=insert_node_before(pre,n,fontkern(leftkern))
+                done=true
+              end
+            end
+          end
+        end
+      end
+      if post then
+        for n in traverse_char(post) do
+          local p=rawget(properties,n)
+          if p then
+            local i=p.injections or p.postinjections
+            if i then
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                post=insert_node_before(post,n,fontkern(leftkern))
+                done=true
+              end
+            end
+          end
+        end
+      end
+      if replace then
+        for n in traverse_char(replace) do
+          local p=rawget(properties,n)
+          if p then
+            local i=p.injections or p.replaceinjections
+            if i then
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                replace=insert_node_before(replace,n,fontkern(leftkern))
+                done=true
+              end
+            end
+          end
+        end
+      end
+      if done then
+        setdisc(current,pre,post,replace)
+      end
+      prevdisc=current
+    else
+      prevdisc=nil
+    end
+    prev=current
+    current=next
+  end
+  if keepregisteredcounts then
+    keepregisteredcounts=false
+  else
+    nofregisteredkerns=0
+  end
+  if trace_injections then
+    show_result(head)
+  end
+  return tonode(head),true
+end
+local function inject_positions_only(head,where)
+  head=tonut(head)
+  if trace_injections then
+    trace(head,"positions")
+  end
+  local current=head
+  local prev=nil
+  local next=nil
+  local prevdisc=nil
+  local prevglyph=nil
+  local pre=nil 
+  local post=nil 
+  local replace=nil 
+  local pretail=nil 
+  local posttail=nil 
+  local replacetail=nil 
+  while current do
+    local next=getnext(current)
+    local char,id=ischar(current)
+    if char then
+      local p=rawget(properties,current)
+      if p then
+        local i=p.injections
+        if i then
+          local yoffset=i.yoffset
+          if yoffset and yoffset~=0 then
+            setoffsets(current,false,yoffset)
+          end
+          local leftkern=i.leftkern
+          if leftkern and leftkern~=0 then
+            head=insert_node_before(head,current,fontkern(leftkern))
+          end
+          local rightkern=i.rightkern
+          if rightkern and rightkern~=0 then
+            insert_node_after(head,current,fontkern(rightkern))
+          end
+        else
+          local i=p.emptyinjections
+          if i then
+            local rightkern=i.rightkern
+            if rightkern and rightkern~=0 then
+              if next and getid(next)==disc_code then
+                if replace then
+                else
+                  setfield(next,"replace",fontkern(rightkern)) 
+                end
+              end
+            end
+          end
+        end
+        if prevdisc then
+          local done=false
+          if post then
+            local i=p.postinjections
+            if i then
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                setlink(posttail,fontkern(leftkern))
+                done=true
+              end
+            end
+          end
+          if replace then
+            local i=p.replaceinjections
+            if i then
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                setlink(replacetail,fontkern(leftkern))
+                done=true
+              end
+            end
+          else
+            local i=p.emptyinjections
+            if i then
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                setfield(prev,"replace",fontkern(leftkern)) 
+              end
+            end
+          end
+          if done then
+            setdisc(prevdisc,pre,post,replace)
+          end
+        end
+      end
+      prevdisc=nil
+      prevglyph=current
+    elseif char==false then
+      prevdisc=nil
+      prevglyph=current
+    elseif id==disc_code then
+      pre,post,replace,pretail,posttail,replacetail=getdisc(current,true)
+      local done=false
+      if pre then
+        for n in traverse_char(pre) do
+          local p=rawget(properties,n)
+          if p then
+            local i=p.injections or p.preinjections
+            if i then
+              local yoffset=i.yoffset
+              if yoffset and yoffset~=0 then
+                setoffsets(n,false,yoffset)
+              end
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                pre=insert_node_before(pre,n,fontkern(leftkern))
+                done=true
+              end
+              local rightkern=i.rightkern
+              if rightkern and rightkern~=0 then
+                insert_node_after(pre,n,fontkern(rightkern))
+                done=true
+              end
+            end
+          end
+        end
+      end
+      if post then
+        for n in traverse_char(post) do
+          local p=rawget(properties,n)
+          if p then
+            local i=p.injections or p.postinjections
+            if i then
+              local yoffset=i.yoffset
+              if yoffset and yoffset~=0 then
+                setoffsets(n,false,yoffset)
+              end
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                post=insert_node_before(post,n,fontkern(leftkern))
+                done=true
+              end
+              local rightkern=i.rightkern
+              if rightkern and rightkern~=0 then
+                insert_node_after(post,n,fontkern(rightkern))
+                done=true
+              end
+            end
+          end
+        end
+      end
+      if replace then
+        for n in traverse_char(replace) do
+          local p=rawget(properties,n)
+          if p then
+            local i=p.injections or p.replaceinjections
+            if i then
+              local yoffset=i.yoffset
+              if yoffset and yoffset~=0 then
+                setoffsets(n,false,yoffset)
+              end
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                replace=insert_node_before(replace,n,fontkern(leftkern))
+                done=true
+              end
+              local rightkern=i.rightkern
+              if rightkern and rightkern~=0 then
+                insert_node_after(replace,n,fontkern(rightkern))
+                done=true
+              end
+            end
+          end
+        end
+      end
+      if prevglyph then
+        if pre then
+          local p=rawget(properties,prevglyph)
+          if p then
+            local i=p.preinjections
+            if i then
+              local rightkern=i.rightkern
+              if rightkern and rightkern~=0 then
+                pre=insert_node_before(pre,pre,fontkern(rightkern))
+                done=true
+              end
+            end
+          end
+        end
+        if replace then
+          local p=rawget(properties,prevglyph)
+          if p then
+            local i=p.replaceinjections
+            if i then
+              local rightkern=i.rightkern
+              if rightkern and rightkern~=0 then
+                replace=insert_node_before(replace,replace,fontkern(rightkern))
+                done=true
+              end
+            end
+          end
+        end
+      end
+      if done then
+        setdisc(current,pre,post,replace)
+      end
+      prevglyph=nil
+      prevdisc=current
+    else
+      prevglyph=nil
+      prevdisc=nil
+    end
+    prev=current
+    current=next
+  end
+  if keepregisteredcounts then
+    keepregisteredcounts=false
+  else
+    nofregisteredpositions=0
+  end
+  if trace_injections then
+    show_result(head)
+  end
+  return tonode(head),true
+end
+local function showoffset(n,flag)
+  local x,y=getoffsets(n)
+  if x~=0 or y~=0 then
+    setcolor(n,"darkgray")
+  end
+end
+local function inject_everything(head,where)
+  head=tonut(head)
+  if trace_injections then
+    trace(head,"everything")
+  end
+  local hascursives=nofregisteredcursives>0
+  local hasmarks=nofregisteredmarks>0
+  local current=head
+  local last=nil
+  local font=font
+  local markdata=nil
+  local prev=nil
+  local next=nil
+  local prevdisc=nil
+  local prevglyph=nil
+  local pre=nil 
+  local post=nil 
+  local replace=nil 
+  local pretail=nil 
+  local posttail=nil 
+  local replacetail=nil
+  local cursiveanchor=nil
+  local minc=0
+  local maxc=0
+  local glyphs={}
+  local marks={}
+  local nofmarks=0
+  local function processmark(p,n,pn) 
+    local px,py=getoffsets(p)
+    local nx,ny=getoffsets(n)
+    local ox=0
+    local rightkern=nil
+    local pp=rawget(properties,p)
+    if pp then
+      pp=pp.injections
+      if pp then
+        rightkern=pp.rightkern
+      end
+    end
+    if rightkern then 
+      if pn.markdir<0 then
+        ox=px-pn.markx-rightkern
+      else
+        if false then
+          local leftkern=pp.leftkern
+          if leftkern then
+            ox=px-pn.markx-leftkern
+          else
+            ox=px-pn.markx
+          end
+        else
+          ox=px-pn.markx-rightkern 
+        end
+      end
+    else
+      if pn.markdir<0 then
+        ox=px-pn.markx
+if not pn.markmark then 
+  ox=ox+(pn.leftkern or 0)
+end
+      else
+        ox=px-pn.markx
+      end
+      if pn.checkmark then
+        local wn=getwidth(n) 
+        if wn and wn~=0 then
+          wn=wn/2
+          if trace_injections then
+            report_injections("correcting non zero width mark %C",getchar(n))
+          end
+          insert_node_before(n,n,fontkern(-wn))
+          insert_node_after(n,n,fontkern(-wn))
+        end
+      end
+    end
+    local oy=ny+py+pn.marky
+if not pn.markmark then
+  oy=oy+(pn.yoffset or 0)
+end
+    setoffsets(n,ox,oy)
+    if trace_marks then
+      showoffset(n,true)
+    end
+  end
+  while current do
+    local next=getnext(current)
+    local char,id=ischar(current)
+    if char then
+      local p=rawget(properties,current)
+      if p then
+        local i=p.injections
+        if i then
+          local pm=i.markbasenode
+          if pm then
+            nofmarks=nofmarks+1
+            marks[nofmarks]=current
+          else
+            local yoffset=i.yoffset
+            if yoffset and yoffset~=0 then
+              setoffsets(current,false,yoffset)
+            end
+            if hascursives then
+              local cursivex=i.cursivex
+              if cursivex then
+                if cursiveanchor then
+                  if cursivex~=0 then
+                    i.leftkern=(i.leftkern or 0)+cursivex
+                  end
+                  if maxc==0 then
+                    minc=1
+                    maxc=1
+                    glyphs[1]=cursiveanchor
+                  else
+                    maxc=maxc+1
+                    glyphs[maxc]=cursiveanchor
+                  end
+                  properties[cursiveanchor].cursivedy=i.cursivey 
+                  last=current
+                else
+                  maxc=0
+                end
+              elseif maxc>0 then
+                local nx,ny=getoffsets(current)
+                for i=maxc,minc,-1 do
+                  local ti=glyphs[i]
+                  ny=ny+properties[ti].cursivedy
+                  setoffsets(ti,false,ny) 
+                  if trace_cursive then
+                    showoffset(ti)
+                  end
+                end
+                maxc=0
+                cursiveanchor=nil
+              end
+              if i.cursiveanchor then
+                cursiveanchor=current 
+              else
+                if maxc>0 then
+                  local nx,ny=getoffsets(current)
+                  for i=maxc,minc,-1 do
+                    local ti=glyphs[i]
+                    ny=ny+properties[ti].cursivedy
+                    setoffsets(ti,false,ny) 
+                    if trace_cursive then
+                      showoffset(ti)
+                    end
+                  end
+                  maxc=0
+                end
+                cursiveanchor=nil
+              end
+            end
+            local leftkern=i.leftkern
+            if leftkern and leftkern~=0 then
+              head=insert_node_before(head,current,fontkern(leftkern))
+            end
+            local rightkern=i.rightkern
+            if rightkern and rightkern~=0 then
+              insert_node_after(head,current,fontkern(rightkern))
+            end
+          end
+        else
+          local i=p.emptyinjections
+          if i then
+            local rightkern=i.rightkern
+            if rightkern and rightkern~=0 then
+              if next and getid(next)==disc_code then
+                if replace then
+                else
+                  setfield(next,"replace",fontkern(rightkern)) 
+                end
+              end
+            end
+          end
+        end
+        if prevdisc then
+          if p then
+            local done=false
+            if post then
+              local i=p.postinjections
+              if i then
+                local leftkern=i.leftkern
+                if leftkern and leftkern~=0 then
+                  setlink(posttail,fontkern(leftkern))
+                  done=true
+                end
+              end
+            end
+            if replace then
+              local i=p.replaceinjections
+              if i then
+                local leftkern=i.leftkern
+                if leftkern and leftkern~=0 then
+                  setlink(replacetail,fontkern(leftkern))
+                  done=true
+                end
+              end
+            else
+              local i=p.emptyinjections
+              if i then
+                local leftkern=i.leftkern
+                if leftkern and leftkern~=0 then
+                  setfield(prev,"replace",fontkern(leftkern)) 
+                end
+              end
+            end
+            if done then
+              setdisc(prevdisc,pre,post,replace)
+            end
+          end
+        end
+      else
+        if hascursives and maxc>0 then
+          local nx,ny=getoffsets(current)
+          for i=maxc,minc,-1 do
+            local ti=glyphs[i]
+            ny=ny+properties[ti].cursivedy
+            local xi,yi=getoffsets(ti)
+            setoffsets(ti,xi,yi+ny) 
+          end
+          maxc=0
+          cursiveanchor=nil
+        end
+      end
+      prevdisc=nil
+      prevglyph=current
+    elseif char==false then
+      prevdisc=nil
+      prevglyph=current
+    elseif id==disc_code then
+      pre,post,replace,pretail,posttail,replacetail=getdisc(current,true)
+      local done=false
+      if pre then
+        for n in traverse_char(pre) do
+          local p=rawget(properties,n)
+          if p then
+            local i=p.injections or p.preinjections
+            if i then
+              local yoffset=i.yoffset
+              if yoffset and yoffset~=0 then
+                setoffsets(n,false,yoffset)
+              end
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                pre=insert_node_before(pre,n,fontkern(leftkern))
+                done=true
+              end
+              local rightkern=i.rightkern
+              if rightkern and rightkern~=0 then
+                insert_node_after(pre,n,fontkern(rightkern))
+                done=true
+              end
+              if hasmarks then
+                local pm=i.markbasenode
+                if pm then
+                  processmark(pm,n,i)
+                end
+              end
+            end
+          end
+        end
+      end
+      if post then
+        for n in traverse_char(post) do
+          local p=rawget(properties,n)
+          if p then
+            local i=p.injections or p.postinjections
+            if i then
+              local yoffset=i.yoffset
+              if yoffset and yoffset~=0 then
+                setoffsets(n,false,yoffset)
+              end
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                post=insert_node_before(post,n,fontkern(leftkern))
+                done=true
+              end
+              local rightkern=i.rightkern
+              if rightkern and rightkern~=0 then
+                insert_node_after(post,n,fontkern(rightkern))
+                done=true
+              end
+              if hasmarks then
+                local pm=i.markbasenode
+                if pm then
+                  processmark(pm,n,i)
+                end
+              end
+            end
+          end
+        end
+      end
+      if replace then
+        for n in traverse_char(replace) do
+          local p=rawget(properties,n)
+          if p then
+            local i=p.injections or p.replaceinjections
+            if i then
+              local yoffset=i.yoffset
+              if yoffset and yoffset~=0 then
+                setoffsets(n,false,yoffset)
+              end
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                replace=insert_node_before(replace,n,fontkern(leftkern))
+                done=true
+              end
+              local rightkern=i.rightkern
+              if rightkern and rightkern~=0 then
+                insert_node_after(replace,n,fontkern(rightkern))
+                done=true
+              end
+              if hasmarks then
+                local pm=i.markbasenode
+                if pm then
+                  processmark(pm,n,i)
+                end
+              end
+            end
+          end
+        end
+      end
+      if prevglyph then
+        if pre then
+          local p=rawget(properties,prevglyph)
+          if p then
+            local i=p.preinjections
+            if i then
+              local rightkern=i.rightkern
+              if rightkern and rightkern~=0 then
+                pre=insert_node_before(pre,pre,fontkern(rightkern))
+                done=true
+              end
+            end
+          end
+        end
+        if replace then
+          local p=rawget(properties,prevglyph)
+          if p then
+            local i=p.replaceinjections
+            if i then
+              local rightkern=i.rightkern
+              if rightkern and rightkern~=0 then
+                replace=insert_node_before(replace,replace,fontkern(rightkern))
+                done=true
+              end
+            end
+          end
+        end
+      end
+      if done then
+        setdisc(current,pre,post,replace)
+      end
+      prevglyph=nil
+      prevdisc=current
+    else
+      prevglyph=nil
+      prevdisc=nil
+    end
+    prev=current
+    current=next
+  end
+  if hascursives and maxc>0 then
+    local nx,ny=getoffsets(last)
+    for i=maxc,minc,-1 do
+      local ti=glyphs[i]
+      ny=ny+properties[ti].cursivedy
+      setoffsets(ti,false,ny) 
+      if trace_cursive then
+        showoffset(ti)
+      end
+    end
+  end
+  if nofmarks>0 then
+    for i=1,nofmarks do
+      local m=marks[i]
+      local p=rawget(properties,m)
+      local i=p.injections
+      local b=i.markbasenode
+      processmark(b,m,i)
+    end
+  elseif hasmarks then
+  end
+  if keepregisteredcounts then
+    keepregisteredcounts=false
+  else
+    nofregisteredkerns=0
+    nofregisteredpositions=0
+    nofregisteredmarks=0
+    nofregisteredcursives=0
+  end
+  if trace_injections then
+    show_result(head)
+  end
+  return tonode(head),true
+end
+local triggers=false
+function nodes.injections.setspacekerns(font,sequence)
+  if triggers then
+    triggers[font]=sequence
+  else
+    triggers={ [font]=sequence }
+  end
+end
+local getthreshold
+if context then
+  local threshold=1 
+  local parameters=fonts.hashes.parameters
+  directives.register("otf.threshold",function(v) threshold=tonumber(v) or 1 end)
+  getthreshold=function(font)
+    local p=parameters[font]
+    local f=p.factor
+    local s=p.spacing
+    local t=threshold*(s and s.width or p.space or 0)-2
+    return t>0 and t or 0,f
+  end
+else
+  injections.threshold=0
+  getthreshold=function(font)
+    local p=fontdata[font].parameters
+    local f=p.factor
+    local s=p.spacing
+    local t=injections.threshold*(s and s.width or p.space or 0)-2
+    return t>0 and t or 0,f
+  end
+end
+injections.getthreshold=getthreshold
+function injections.isspace(n,threshold,id)
+  if (id or getid(n))==glue_code then
+    local w=getwidth(n)
+    if threshold and w>threshold then 
+      return 32
+    end
+  end
+end
+local getspaceboth=getboth
+function injections.installgetspaceboth(gb)
+  getspaceboth=gb or getboth
+end
+local function injectspaces(head)
+  if not triggers then
+    return head,false
+  end
+  local lastfont=nil
+  local spacekerns=nil
+  local leftkerns=nil
+  local rightkerns=nil
+  local factor=0
+  local threshold=0
+  local leftkern=false
+  local rightkern=false
+  local function updatefont(font,trig)
+    leftkerns=trig.left
+    rightkerns=trig.right
+    lastfont=font
+    threshold,
+    factor=getthreshold(font)
+  end
+  for n in traverse_char(tonut(head)) do
+    local prev,next=getspaceboth(n)
+    local prevchar=prev and ischar(prev)
+    local nextchar=next and ischar(next)
+    if nextchar then
+      local font=getfont(next)
+      local trig=triggers[font]
+      if trig then
+        if lastfont~=font then
+          updatefont(font,trig)
+        end
+        if rightkerns then
+          rightkern=rightkerns[nextchar]
+        end
+      end
+    end
+    if prevchar then
+      local font=getfont(prev)
+      local trig=triggers[font]
+      if trig then
+        if lastfont~=font then
+          updatefont(font,trig)
+        end
+        if leftkerns then
+          leftkern=leftkerns[prevchar]
+        end
+      end
+    end
+    if leftkern then
+      local old=getwidth(n)
+      if old>threshold then
+        if rightkern then
+          local new=old+(leftkern+rightkern)*factor
+          if trace_spaces then
+            report_spaces("%C [%p -> %p] %C",prevchar,old,new,nextchar)
+          end
+          setwidth(n,new)
+          leftkern=false
+        else
+          local new=old+leftkern*factor
+          if trace_spaces then
+            report_spaces("%C [%p -> %p]",prevchar,old,new)
+          end
+          setwidth(n,new)
+        end
+      end
+      leftkern=false
+    elseif rightkern then
+      local old=getwidth(n)
+      if old>threshold then
+        local new=old+rightkern*factor
+        if trace_spaces then
+          report_spaces("[%p -> %p] %C",nextchar,old,new)
+        end
+        setwidth(n,new)
+      end
+      rightkern=false
+    end
+  end
+  triggers=false
+  return head,true
+end
+function injections.handler(head,where)
+  if triggers then
+    head=injectspaces(head)
+  end
+  if nofregisteredmarks>0 or nofregisteredcursives>0 then
+    if trace_injections then
+      report_injections("injection variant %a","everything")
+    end
+    return inject_everything(head,where)
+  elseif nofregisteredpositions>0 then
+    if trace_injections then
+      report_injections("injection variant %a","positions")
+    end
+    return inject_positions_only(head,where)
+  elseif nofregisteredkerns>0 then
+    if trace_injections then
+      report_injections("injection variant %a","kerns")
+    end
+    return inject_kerns_only(head,where)
+  else
+    return head,false
+  end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-ota']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local type=type
+if not trackers then trackers={ register=function() end } end
+local fonts,nodes,node=fonts,nodes,node
+local allocate=utilities.storage.allocate
+local otf=fonts.handlers.otf
+local analyzers=fonts.analyzers
+local initializers=allocate()
+local methods=allocate()
+analyzers.initializers=initializers
+analyzers.methods=methods
+local a_state=attributes.private('state')
+local nuts=nodes.nuts
+local tonut=nuts.tonut
+local getnext=nuts.getnext
+local getprev=nuts.getprev
+local getprev=nuts.getprev
+local getprop=nuts.getprop
+local setprop=nuts.setprop
+local getfont=nuts.getfont
+local getsubtype=nuts.getsubtype
+local getchar=nuts.getchar
+local ischar=nuts.is_char
+local traverse_id=nuts.traverse_id
+local end_of_math=nuts.end_of_math
+local nodecodes=nodes.nodecodes
+local disc_code=nodecodes.disc
+local math_code=nodecodes.math
+local fontdata=fonts.hashes.identifiers
+local categories=characters and characters.categories or {} 
+local chardata=characters and characters.data
+local otffeatures=fonts.constructors.features.otf
+local registerotffeature=otffeatures.register
+local s_init=1  local s_rphf=7
+local s_medi=2  local s_half=8
+local s_fina=3  local s_pref=9
+local s_isol=4  local s_blwf=10
+local s_mark=5  local s_pstf=11
+local s_rest=6
+local states={
+  init=s_init,
+  medi=s_medi,
+  med2=s_medi,
+  fina=s_fina,
+  fin2=s_fina,
+  fin3=s_fina,
+  isol=s_isol,
+  mark=s_mark,
+  rest=s_rest,
+  rphf=s_rphf,
+  half=s_half,
+  pref=s_pref,
+  blwf=s_blwf,
+  pstf=s_pstf,
+}
+local features={
+  init=s_init,
+  medi=s_medi,
+  med2=s_medi,
+  fina=s_fina,
+  fin2=s_fina,
+  fin3=s_fina,
+  isol=s_isol,
+  rphf=s_rphf,
+  half=s_half,
+  pref=s_pref,
+  blwf=s_blwf,
+  pstf=s_pstf,
+}
+analyzers.states=states
+analyzers.features=features
+analyzers.useunicodemarks=false
+function analyzers.setstate(head,font)
+  local useunicodemarks=analyzers.useunicodemarks
+  local tfmdata=fontdata[font]
+  local descriptions=tfmdata.descriptions
+  local first,last,current,n,done=nil,nil,head,0,false 
+  current=tonut(current)
+  while current do
+    local char,id=ischar(current,font)
+    if char and not getprop(current,a_state) then
+      done=true
+      local d=descriptions[char]
+      if d then
+        if d.class=="mark" then
+          done=true
+          setprop(current,a_state,s_mark)
+        elseif useunicodemarks and categories[char]=="mn" then
+          done=true
+          setprop(current,a_state,s_mark)
+        elseif n==0 then
+          first,last,n=current,current,1
+          setprop(current,a_state,s_init)
+        else
+          last,n=current,n+1
+          setprop(current,a_state,s_medi)
+        end
+      else 
+        if first and first==last then
+          setprop(last,a_state,s_isol)
+        elseif last then
+          setprop(last,a_state,s_fina)
+        end
+        first,last,n=nil,nil,0
+      end
+    elseif char==false then
+      if first and first==last then
+        setprop(last,a_state,s_isol)
+      elseif last then
+        setprop(last,a_state,s_fina)
+      end
+      first,last,n=nil,nil,0
+      if id==math_code then
+        current=end_of_math(current)
+      end
+    elseif id==disc_code then
+      setprop(current,a_state,s_medi)
+      last=current
+    else 
+      if first and first==last then
+        setprop(last,a_state,s_isol)
+      elseif last then
+        setprop(last,a_state,s_fina)
+      end
+      first,last,n=nil,nil,0
+      if id==math_code then
+        current=end_of_math(current)
+      end
+    end
+    current=getnext(current)
+  end
+  if first and first==last then
+    setprop(last,a_state,s_isol)
+  elseif last then
+    setprop(last,a_state,s_fina)
+  end
+  return head,done
+end
+local function analyzeinitializer(tfmdata,value) 
+  local script,language=otf.scriptandlanguage(tfmdata) 
+  local action=initializers[script]
+  if not action then
+  elseif type(action)=="function" then
+    return action(tfmdata,value)
+  else
+    local action=action[language]
+    if action then
+      return action(tfmdata,value)
+    end
+  end
+end
+local function analyzeprocessor(head,font,attr)
+  local tfmdata=fontdata[font]
+  local script,language=otf.scriptandlanguage(tfmdata,attr)
+  local action=methods[script]
+  if not action then
+  elseif type(action)=="function" then
+    return action(head,font,attr)
+  else
+    action=action[language]
+    if action then
+      return action(head,font,attr)
+    end
+  end
+  return head,false
+end
+registerotffeature {
+  name="analyze",
+  description="analysis of character classes",
+  default=true,
+  initializers={
+    node=analyzeinitializer,
+  },
+  processors={
+    position=1,
+    node=analyzeprocessor,
+  }
+}
+methods.latn=analyzers.setstate
+local arab_warned={}
+local function warning(current,what)
+  local char=getchar(current)
+  if not arab_warned[char] then
+    log.report("analyze","arab: character %C has no %a class",char,what)
+    arab_warned[char]=true
+  end
+end
+local mappers={
+  l=s_init,
+  d=s_medi,
+  c=s_medi,
+  r=s_fina,
+  u=s_isol,
+}
+local classifiers=characters.classifiers
+if not classifiers then
+  local f_arabic,l_arabic=characters.blockrange("arabic")
+  local f_syriac,l_syriac=characters.blockrange("syriac")
+  local f_mandiac,l_mandiac=characters.blockrange("mandiac")
+  local f_nko,l_nko=characters.blockrange("nko")
+  local f_ext_a,l_ext_a=characters.blockrange("arabicextendeda")
+  classifiers=table.setmetatableindex(function(t,k)
+    if type(k)=="number" then
+      local c=chardata[k]
+      local v=false
+      if c then
+        local arabic=c.arabic
+        if arabic then
+          v=mappers[arabic]
+          if not v then
+            log.report("analyze","error in mapping arabic %C",k)
+            v=false
+          end
+        elseif (k>=f_arabic and k<=l_arabic) or
+            (k>=f_syriac and k<=l_syriac) or
+            (k>=f_mandiac and k<=l_mandiac) or
+            (k>=f_nko   and k<=l_nko)   or
+            (k>=f_ext_a  and k<=l_ext_a)  then
+          if categories[k]=="mn" then
+            v=s_mark
+          else
+            v=s_rest
+          end
+        end
+      end
+      t[k]=v
+      return v
+    end
+  end)
+  characters.classifiers=classifiers
+end
+function methods.arab(head,font,attr)
+  local first,last=nil,nil
+  local c_first,c_last=nil,nil
+  local current,done=head,false
+  current=tonut(current)
+  while current do
+    local char,id=ischar(current,font)
+    if char and not getprop(current,a_state) then
+      done=true
+      local classifier=classifiers[char]
+      if not classifier then
+        if last then
+          if c_last==s_medi or c_last==s_fina then
+            setprop(last,a_state,s_fina)
+          else
+            warning(last,"fina")
+            setprop(last,a_state,s_error)
+          end
+          first,last=nil,nil
+        elseif first then
+          if c_first==s_medi or c_first==s_fina then
+            setprop(first,a_state,s_isol)
+          else
+            warning(first,"isol")
+            setprop(first,a_state,s_error)
+          end
+          first=nil
+        end
+      elseif classifier==s_mark then
+        setprop(current,a_state,s_mark)
+      elseif classifier==s_isol then
+        if last then
+          if c_last==s_medi or c_last==s_fina then
+            setprop(last,a_state,s_fina)
+          else
+            warning(last,"fina")
+            setprop(last,a_state,s_error)
+          end
+          first,last=nil,nil
+        elseif first then
+          if c_first==s_medi or c_first==s_fina then
+            setprop(first,a_state,s_isol)
+          else
+            warning(first,"isol")
+            setprop(first,a_state,s_error)
+          end
+          first=nil
+        end
+        setprop(current,a_state,s_isol)
+      elseif classifier==s_medi then
+        if first then
+          last=current
+          c_last=classifier
+          setprop(current,a_state,s_medi)
+        else
+          setprop(current,a_state,s_init)
+          first=current
+          c_first=classifier
+        end
+      elseif classifier==s_fina then
+        if last then
+          if getprop(last,a_state)~=s_init then
+            setprop(last,a_state,s_medi)
+          end
+          setprop(current,a_state,s_fina)
+          first,last=nil,nil
+        elseif first then
+          setprop(current,a_state,s_fina)
+          first=nil
+        else
+          setprop(current,a_state,s_isol)
+        end
+      else 
+        setprop(current,a_state,s_rest)
+        if last then
+          if c_last==s_medi or c_last==s_fina then
+            setprop(last,a_state,s_fina)
+          else
+            warning(last,"fina")
+            setprop(last,a_state,s_error)
+          end
+          first,last=nil,nil
+        elseif first then
+          if c_first==s_medi or c_first==s_fina then
+            setprop(first,a_state,s_isol)
+          else
+            warning(first,"isol")
+            setprop(first,a_state,s_error)
+          end
+          first=nil
+        end
+      end
+    else
+      if last then
+        if c_last==s_medi or c_last==s_fina then
+          setprop(last,a_state,s_fina)
+        else
+          warning(last,"fina")
+          setprop(last,a_state,s_error)
+        end
+        first,last=nil,nil
+      elseif first then
+        if c_first==s_medi or c_first==s_fina then
+          setprop(first,a_state,s_isol)
+        else
+          warning(first,"isol")
+          setprop(first,a_state,s_error)
+        end
+        first=nil
+      end
+      if id==math_code then 
+        current=end_of_math(current)
+      end
+    end
+    current=getnext(current)
+  end
+  if last then
+    if c_last==s_medi or c_last==s_fina then
+      setprop(last,a_state,s_fina)
+    else
+      warning(last,"fina")
+      setprop(last,a_state,s_error)
+    end
+  elseif first then
+    if c_first==s_medi or c_first==s_fina then
+      setprop(first,a_state,s_isol)
+    else
+      warning(first,"isol")
+      setprop(first,a_state,s_error)
+    end
+  end
+  return head,done
+end
+methods.syrc=methods.arab
+methods.mand=methods.arab
+methods.nko=methods.arab
+directives.register("otf.analyze.useunicodemarks",function(v)
+  analyzers.useunicodemarks=v
+end)
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-ots']={ 
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files",
+}
+local type,next,tonumber=type,next,tonumber
+local random=math.random
+local formatters=string.formatters
+local insert=table.insert
+local registertracker=trackers.register
+local logs=logs
+local trackers=trackers
+local nodes=nodes
+local attributes=attributes
+local fonts=fonts
+local otf=fonts.handlers.otf
+local tracers=nodes.tracers
+local trace_singles=false registertracker("otf.singles",function(v) trace_singles=v end)
+local trace_multiples=false registertracker("otf.multiples",function(v) trace_multiples=v end)
+local trace_alternatives=false registertracker("otf.alternatives",function(v) trace_alternatives=v end)
+local trace_ligatures=false registertracker("otf.ligatures",function(v) trace_ligatures=v end)
+local trace_contexts=false registertracker("otf.contexts",function(v) trace_contexts=v end)
+local trace_marks=false registertracker("otf.marks",function(v) trace_marks=v end)
+local trace_kerns=false registertracker("otf.kerns",function(v) trace_kerns=v end)
+local trace_cursive=false registertracker("otf.cursive",function(v) trace_cursive=v end)
+local trace_preparing=false registertracker("otf.preparing",function(v) trace_preparing=v end)
+local trace_bugs=false registertracker("otf.bugs",function(v) trace_bugs=v end)
+local trace_details=false registertracker("otf.details",function(v) trace_details=v end)
+local trace_steps=false registertracker("otf.steps",function(v) trace_steps=v end)
+local trace_skips=false registertracker("otf.skips",function(v) trace_skips=v end)
+local trace_directions=false registertracker("otf.directions",function(v) trace_directions=v end)
+local trace_plugins=false registertracker("otf.plugins",function(v) trace_plugins=v end)
+local trace_chains=false registertracker("otf.chains",function(v) trace_chains=v end)
+local trace_kernruns=false registertracker("otf.kernruns",function(v) trace_kernruns=v end)
+local trace_discruns=false registertracker("otf.discruns",function(v) trace_discruns=v end)
+local trace_compruns=false registertracker("otf.compruns",function(v) trace_compruns=v end)
+local trace_testruns=false registertracker("otf.testruns",function(v) trace_testruns=v end)
+local forcediscretionaries=false
+local forcepairadvance=false 
+directives.register("otf.forcediscretionaries",function(v)
+  forcediscretionaries=v
+end)
+directives.register("otf.forcepairadvance",function(v)
+  forcepairadvance=v
+end)
+local report_direct=logs.reporter("fonts","otf direct")
+local report_subchain=logs.reporter("fonts","otf subchain")
+local report_chain=logs.reporter("fonts","otf chain")
+local report_process=logs.reporter("fonts","otf process")
+local report_warning=logs.reporter("fonts","otf warning")
+local report_run=logs.reporter("fonts","otf run")
+registertracker("otf.substitutions","otf.singles","otf.multiples","otf.alternatives","otf.ligatures")
+registertracker("otf.positions","otf.marks","otf.kerns","otf.cursive")
+registertracker("otf.actions","otf.substitutions","otf.positions")
+registertracker("otf.sample","otf.steps","otf.substitutions","otf.positions","otf.analyzing")
+local nuts=nodes.nuts
+local tonode=nuts.tonode
+local tonut=nuts.tonut
+local getfield=nuts.getfield
+local setfield=nuts.setfield
+local getnext=nuts.getnext
+local setnext=nuts.setnext
+local getprev=nuts.getprev
+local setprev=nuts.setprev
+local getboth=nuts.getboth
+local setboth=nuts.setboth
+local getid=nuts.getid
+local getattr=nuts.getattr
+local setattr=nuts.setattr
+local getprop=nuts.getprop
+local setprop=nuts.setprop
+local getfont=nuts.getfont
+local getsubtype=nuts.getsubtype
+local setsubtype=nuts.setsubtype
+local getchar=nuts.getchar
+local setchar=nuts.setchar
+local getdisc=nuts.getdisc
+local setdisc=nuts.setdisc
+local setlink=nuts.setlink
+local getcomponents=nuts.getcomponents 
+local setcomponents=nuts.setcomponents 
+local getdir=nuts.getdir
+local getwidth=nuts.getwidth
+local ischar=nuts.is_char
+local usesfont=nuts.uses_font
+local insert_node_after=nuts.insert_after
+local copy_node=nuts.copy
+local copy_node_list=nuts.copy_list
+local find_node_tail=nuts.tail
+local flush_node_list=nuts.flush_list
+local flush_node=nuts.flush_node
+local end_of_math=nuts.end_of_math
+local traverse_nodes=nuts.traverse
+local set_components=nuts.set_components
+local take_components=nuts.take_components
+local count_components=nuts.count_components
+local copy_no_components=nuts.copy_no_components
+local copy_only_glyphs=nuts.copy_only_glyphs
+local setmetatable=setmetatable
+local setmetatableindex=table.setmetatableindex
+local nodecodes=nodes.nodecodes
+local glyphcodes=nodes.glyphcodes
+local disccodes=nodes.disccodes
+local glyph_code=nodecodes.glyph
+local glue_code=nodecodes.glue
+local disc_code=nodecodes.disc
+local math_code=nodecodes.math
+local dir_code=nodecodes.dir
+local localpar_code=nodecodes.localpar
+local discretionary_code=disccodes.discretionary
+local ligature_code=glyphcodes.ligature
+local a_state=attributes.private('state')
+local a_noligature=attributes.private("noligature")
+local injections=nodes.injections
+local setmark=injections.setmark
+local setcursive=injections.setcursive
+local setkern=injections.setkern
+local setmove=injections.setmove
+local setposition=injections.setposition
+local resetinjection=injections.reset
+local copyinjection=injections.copy
+local setligaindex=injections.setligaindex
+local getligaindex=injections.getligaindex
+local fontdata=fonts.hashes.identifiers
+local fontfeatures=fonts.hashes.features
+local otffeatures=fonts.constructors.features.otf
+local registerotffeature=otffeatures.register
+local onetimemessage=fonts.loggers.onetimemessage or function() end
+local getrandom=utilities and utilities.randomizer and utilities.randomizer.get
+otf.defaultnodealternate="none"
+local tfmdata=false
+local characters=false
+local descriptions=false
+local marks=false
+local classes=false
+local currentfont=false
+local factor=0
+local threshold=0
+local checkmarks=false
+local discs=false
+local spaces=false
+local sweepnode=nil
+local sweephead={} 
+local notmatchpre={} 
+local notmatchpost={} 
+local notmatchreplace={} 
+local handlers={}
+local isspace=injections.isspace
+local getthreshold=injections.getthreshold
+local checkstep=(tracers and tracers.steppers.check)  or function() end
+local registerstep=(tracers and tracers.steppers.register) or function() end
+local registermessage=(tracers and tracers.steppers.message) or function() end
+local function logprocess(...)
+  if trace_steps then
+    registermessage(...)
+  end
+  report_direct(...)
+end
+local function logwarning(...)
+  report_direct(...)
+end
+local gref do
+  local f_unicode=formatters["U+%X"]   
+  local f_uniname=formatters["U+%X (%s)"] 
+  local f_unilist=formatters["% t (% t)"]
+  gref=function(n) 
+    if type(n)=="number" then
+      local description=descriptions[n]
+      local name=description and description.name
+      if name then
+        return f_uniname(n,name)
+      else
+        return f_unicode(n)
+      end
+    elseif n then
+      local num,nam={},{}
+      for i=1,#n do
+        local ni=n[i]
+        if tonumber(ni) then 
+          local di=descriptions[ni]
+          num[i]=f_unicode(ni)
+          nam[i]=di and di.name or "-"
+        end
+      end
+      return f_unilist(num,nam)
+    else
+      return "<error in node mode tracing>"
+    end
+  end
+end
+local function cref(dataset,sequence,index)
+  if not dataset then
+    return "no valid dataset"
+  end
+  local merged=sequence.merged and "merged " or ""
+  if index then
+    return formatters["feature %a, type %a, %schain lookup %a, index %a"](
+      dataset[4],sequence.type,merged,sequence.name,index)
+  else
+    return formatters["feature %a, type %a, %schain lookup %a"](
+      dataset[4],sequence.type,merged,sequence.name)
+  end
+end
+local function pref(dataset,sequence)
+  return formatters["feature %a, type %a, %slookup %a"](
+    dataset[4],sequence.type,sequence.merged and "merged " or "",sequence.name)
+end
+local function mref(rlmode)
+  if not rlmode or rlmode==0 then
+    return "---"
+  elseif rlmode==-1 or rlmode=="+TRT" then
+    return "r2l"
+  else
+    return "l2r"
+  end
+end
+local function flattendisk(head,disc)
+  local pre,post,replace,pretail,posttail,replacetail=getdisc(disc,true)
+  local prev,next=getboth(disc)
+  local ishead=head==disc
+  setdisc(disc)
+  flush_node(disc)
+  if pre then
+    flush_node_list(pre)
+  end
+  if post then
+    flush_node_list(post)
+  end
+  if ishead then
+    if replace then
+      if next then
+        setlink(replacetail,next)
+      end
+      return replace,replace
+    elseif next then
+      return next,next
+    else
+    end
+  else
+    if replace then
+      if next then
+        setlink(replacetail,next)
+      end
+      setlink(prev,replace)
+      return head,replace
+    else
+      setlink(prev,next) 
+      return head,next
+    end
+  end
+end
+local function appenddisc(disc,list)
+  local pre,post,replace,pretail,posttail,replacetail=getdisc(disc,true)
+  local posthead=list
+  local replacehead=copy_node_list(list)
+  if post then
+    setlink(posttail,posthead)
+  else
+    post=posthead
+  end
+  if replace then
+    setlink(replacetail,replacehead)
+  else
+    replace=replacehead
+  end
+  setdisc(disc,pre,post,replace)
+end
+local take_components=getcomponents 
+local set_components=setcomponents
+local function count_components(start,marks)
+  if getid(start)~=glyph_code then
+    return 0
+  elseif getsubtype(start)==ligature_code then
+    local i=0
+    local components=getcomponents(start)
+    while components do
+      i=i+count_components(components,marks)
+      components=getnext(components)
+    end
+    return i
+  elseif not marks[getchar(start)] then
+    return 1
+  else
+    return 0
+  end
+end
+local function markstoligature(head,start,stop,char)
+  if start==stop and getchar(start)==char then
+    return head,start
+  else
+    local prev=getprev(start)
+    local next=getnext(stop)
+    setprev(start)
+    setnext(stop)
+    local base=copy_no_components(start,copyinjection)
+    if head==start then
+      head=base
+    end
+    resetinjection(base)
+    setchar(base,char)
+    setsubtype(base,ligature_code)
+    set_components(base,start)
+    setlink(prev,base,next)
+    return head,base
+  end
+end
+local function toligature(head,start,stop,char,dataset,sequence,markflag,discfound) 
+  if getattr(start,a_noligature)==1 then
+    return head,start
+  end
+  if start==stop and getchar(start)==char then
+    resetinjection(start)
+    setchar(start,char)
+    return head,start
+  end
+  local prev=getprev(start)
+  local next=getnext(stop)
+  local comp=start
+  setprev(start)
+  setnext(stop)
+  local base=copy_no_components(start,copyinjection)
+  if start==head then
+    head=base
+  end
+  resetinjection(base)
+  setchar(base,char)
+  setsubtype(base,ligature_code)
+  set_components(base,comp)
+  setlink(prev,base,next)
+  if not discfound then
+    local deletemarks=markflag~="mark"
+    local components=start
+    local baseindex=0
+    local componentindex=0
+    local head=base
+    local current=base
+    while start do
+      local char=getchar(start)
+      if not marks[char] then
+        baseindex=baseindex+componentindex
+        componentindex=count_components(start,marks)
+      elseif not deletemarks then 
+        setligaindex(start,baseindex+getligaindex(start,componentindex))
+        if trace_marks then
+          logwarning("%s: keep mark %s, gets index %s",pref(dataset,sequence),gref(char),getligaindex(start))
+        end
+        local n=copy_node(start)
+        copyinjection(n,start)
+        head,current=insert_node_after(head,current,n) 
+      elseif trace_marks then
+        logwarning("%s: delete mark %s",pref(dataset,sequence),gref(char))
+      end
+      start=getnext(start)
+    end
+    local start=getnext(current)
+    while start do
+      local char=ischar(start)
+      if char then
+        if marks[char] then
+          setligaindex(start,baseindex+getligaindex(start,componentindex))
+          if trace_marks then
+            logwarning("%s: set mark %s, gets index %s",pref(dataset,sequence),gref(char),getligaindex(start))
+          end
+          start=getnext(start)
+        else
+          break
+        end
+      else
+        break
+      end
+    end
+  else
+    local discprev,discnext=getboth(discfound)
+    if discprev and discnext then
+      local pre,post,replace,pretail,posttail,replacetail=getdisc(discfound,true)
+      if not replace then
+        local prev=getprev(base)
+        local comp=take_components(base)
+        local copied=copy_only_glyphs(comp)
+        if pre then
+          setlink(discprev,pre)
+        else
+          setnext(discprev) 
+        end
+        pre=comp
+        if post then
+          setlink(posttail,discnext)
+          setprev(post)
+        else
+          post=discnext
+          setprev(discnext) 
+        end
+        setlink(prev,discfound,next)
+        setboth(base)
+        set_components(base,copied)
+        replace=base
+        if forcediscretionaries then
+          setdisc(discfound,pre,post,replace,discretionary_code)
+        else
+          setdisc(discfound,pre,post,replace)
+        end
+        base=prev
+      end
+    end
+  end
+  return head,base
+end
+local function multiple_glyphs(head,start,multiple,ignoremarks,what)
+  local nofmultiples=#multiple
+  if nofmultiples>0 then
+    resetinjection(start)
+    setchar(start,multiple[1])
+    if nofmultiples>1 then
+      local sn=getnext(start)
+      for k=2,nofmultiples do
+        local n=copy_node(start) 
+        resetinjection(n)
+        setchar(n,multiple[k])
+        insert_node_after(head,start,n)
+        start=n
+      end
+      if what==true then
+      elseif what>1 then
+        local m=multiple[nofmultiples]
+        for i=2,what do
+          local n=copy_node(start) 
+          resetinjection(n)
+          setchar(n,m)
+          insert_node_after(head,start,n)
+          start=n
+        end
+      end
+    end
+    return head,start,true
+  else
+    if trace_multiples then
+      logprocess("no multiple for %s",gref(getchar(start)))
+    end
+    return head,start,false
+  end
+end
+local function get_alternative_glyph(start,alternatives,value)
+  local n=#alternatives
+  if n==1 then
+    return alternatives[1],trace_alternatives and "1 (only one present)"
+  elseif value=="random" then
+    local r=getrandom and getrandom("glyph",1,n) or random(1,n)
+    return alternatives[r],trace_alternatives and formatters["value %a, taking %a"](value,r)
+  elseif value=="first" then
+    return alternatives[1],trace_alternatives and formatters["value %a, taking %a"](value,1)
+  elseif value=="last" then
+    return alternatives[n],trace_alternatives and formatters["value %a, taking %a"](value,n)
+  end
+  value=value==true and 1 or tonumber(value)
+  if type(value)~="number" then
+    return alternatives[1],trace_alternatives and formatters["invalid value %s, taking %a"](value,1)
+  end
+  if value>n then
+    local defaultalt=otf.defaultnodealternate
+    if defaultalt=="first" then
+      return alternatives[n],trace_alternatives and formatters["invalid value %s, taking %a"](value,1)
+    elseif defaultalt=="last" then
+      return alternatives[1],trace_alternatives and formatters["invalid value %s, taking %a"](value,n)
+    else
+      return false,trace_alternatives and formatters["invalid value %a, %s"](value,"out of range")
+    end
+  elseif value==0 then
+    return getchar(start),trace_alternatives and formatters["invalid value %a, %s"](value,"no change")
+  elseif value<1 then
+    return alternatives[1],trace_alternatives and formatters["invalid value %a, taking %a"](value,1)
+  else
+    return alternatives[value],trace_alternatives and formatters["value %a, taking %a"](value,value)
+  end
+end
+function handlers.gsub_single(head,start,dataset,sequence,replacement)
+  if trace_singles then
+    logprocess("%s: replacing %s by single %s",pref(dataset,sequence),gref(getchar(start)),gref(replacement))
+  end
+  resetinjection(start)
+  setchar(start,replacement)
+  return head,start,true
+end
+function handlers.gsub_alternate(head,start,dataset,sequence,alternative)
+  local kind=dataset[4]
+  local what=dataset[1]
+  local value=what==true and tfmdata.shared.features[kind] or what
+  local choice,comment=get_alternative_glyph(start,alternative,value)
+  if choice then
+    if trace_alternatives then
+      logprocess("%s: replacing %s by alternative %a to %s, %s",pref(dataset,sequence),gref(getchar(start)),gref(choice),comment)
+    end
+    resetinjection(start)
+    setchar(start,choice)
+  else
+    if trace_alternatives then
+      logwarning("%s: no variant %a for %s, %s",pref(dataset,sequence),value,gref(getchar(start)),comment)
+    end
+  end
+  return head,start,true
+end
+function handlers.gsub_multiple(head,start,dataset,sequence,multiple)
+  if trace_multiples then
+    logprocess("%s: replacing %s by multiple %s",pref(dataset,sequence),gref(getchar(start)),gref(multiple))
+  end
+  return multiple_glyphs(head,start,multiple,sequence.flags[1],dataset[1])
+end
+function handlers.gsub_ligature(head,start,dataset,sequence,ligature)
+  local current=getnext(start)
+  if not current then
+    return head,start,false,nil
+  end
+  local stop=nil
+  local startchar=getchar(start)
+  if marks[startchar] then
+    while current do
+      local char=ischar(current,currentfont)
+      if char then
+        local lg=ligature[char]
+        if lg then
+          stop=current
+          ligature=lg
+          current=getnext(current)
+        else
+          break
+        end
+      else
+        break
+      end
+    end
+    if stop then
+      local lig=ligature.ligature
+      if lig then
+        if trace_ligatures then
+          local stopchar=getchar(stop)
+          head,start=markstoligature(head,start,stop,lig)
+          logprocess("%s: replacing %s upto %s by ligature %s case 1",pref(dataset,sequence),gref(startchar),gref(stopchar),gref(getchar(start)))
+        else
+          head,start=markstoligature(head,start,stop,lig)
+        end
+        return head,start,true,false
+      else
+      end
+    end
+  else
+    local skipmark=sequence.flags[1]
+    local discfound=false
+    local lastdisc=nil
+    while current do
+      local char,id=ischar(current,currentfont)
+      if char then
+        if skipmark and marks[char] then
+          current=getnext(current)
+        else 
+          local lg=ligature[char] 
+          if lg then
+            if not discfound and lastdisc then
+              discfound=lastdisc
+              lastdisc=nil
+            end
+            stop=current 
+            ligature=lg
+            current=getnext(current)
+          else
+            break
+          end
+        end
+      elseif char==false then
+        break
+      elseif id==disc_code then
+        local replace=getfield(current,"replace")
+        if replace then
+          while replace do
+            local char,id=ischar(replace,currentfont)
+            if char then
+              local lg=ligature[char] 
+              if lg then
+                ligature=lg
+                replace=getnext(replace)
+              else
+                return head,start,false,false
+              end
+            else
+              return head,start,false,false
+            end
+          end
+          stop=current
+        end
+        lastdisc=current
+        current=getnext(current)
+      else
+        break
+      end
+    end
+    local lig=ligature.ligature
+    if lig then
+      if stop then
+        if trace_ligatures then
+          local stopchar=getchar(stop)
+          head,start=toligature(head,start,stop,lig,dataset,sequence,skipmark,discfound)
+          logprocess("%s: replacing %s upto %s by ligature %s case 2",pref(dataset,sequence),gref(startchar),gref(stopchar),gref(lig))
+        else
+          head,start=toligature(head,start,stop,lig,dataset,sequence,skipmark,discfound)
+        end
+      else
+        resetinjection(start)
+        setchar(start,lig)
+        if trace_ligatures then
+          logprocess("%s: replacing %s by (no real) ligature %s case 3",pref(dataset,sequence),gref(startchar),gref(lig))
+        end
+      end
+      return head,start,true,discfound
+    else
+    end
+  end
+  return head,start,false,discfound
+end
+function handlers.gpos_single(head,start,dataset,sequence,kerns,rlmode,step,i,injection)
+  local startchar=getchar(start)
+  local format=step.format
+  if format=="single" or type(kerns)=="table" then 
+    local dx,dy,w,h=setposition(start,factor,rlmode,sequence.flags[4],kerns,injection)
+    if trace_kerns then
+      logprocess("%s: shifting single %s by %s xy (%p,%p) and wh (%p,%p)",pref(dataset,sequence),gref(startchar),format,dx,dy,w,h)
+    end
+  else
+    local k=(format=="move" and setmove or setkern)(start,factor,rlmode,kerns,injection)
+    if trace_kerns then
+      logprocess("%s: shifting single %s by %s %p",pref(dataset,sequence),gref(startchar),format,k)
+    end
+  end
+  return head,start,false
+end
+function handlers.gpos_pair(head,start,dataset,sequence,kerns,rlmode,step,i,injection)
+  local snext=getnext(start)
+  if not snext then
+    return head,start,false
+  else
+    local prev=start
+    while snext do
+      local nextchar=ischar(snext,currentfont)
+      if nextchar then
+        local krn=kerns[nextchar]
+        if not krn and marks[nextchar] then
+          prev=snext
+          snext=getnext(snext)
+        elseif not krn then
+          break
+        else
+          local format=step.format
+          if format=="pair" then
+            local a,b=krn[1],krn[2]
+            if a==true then
+            elseif a then 
+              local x,y,w,h=setposition(start,factor,rlmode,sequence.flags[4],a,injection)
+              if trace_kerns then
+                local startchar=getchar(start)
+                logprocess("%s: shifting first of pair %s and %s by xy (%p,%p) and wh (%p,%p) as %s",pref(dataset,sequence),gref(startchar),gref(nextchar),x,y,w,h,injection or "injections")
+              end
+            end
+            if b==true then
+              start=snext 
+            elseif b then 
+              local x,y,w,h=setposition(snext,factor,rlmode,sequence.flags[4],b,injection)
+              if trace_kerns then
+                local startchar=getchar(snext)
+                logprocess("%s: shifting second of pair %s and %s by xy (%p,%p) and wh (%p,%p) as %s",pref(dataset,sequence),gref(startchar),gref(nextchar),x,y,w,h,injection or "injections")
+              end
+              start=snext 
+            elseif forcepairadvance then
+              start=snext 
+            end
+            return head,start,true
+          elseif krn~=0 then
+            local k=(format=="move" and setmove or setkern)(snext,factor,rlmode,krn,injection)
+            if trace_kerns then
+              logprocess("%s: inserting %s %p between %s and %s as %s",pref(dataset,sequence),format,k,gref(getchar(prev)),gref(nextchar),injection or "injections")
+            end
+            return head,start,true
+          else 
+            break
+          end
+        end
+      else
+        break
+      end
+    end
+    return head,start,false
+  end
+end
+function handlers.gpos_mark2base(head,start,dataset,sequence,markanchors,rlmode)
+  local markchar=getchar(start)
+  if marks[markchar] then
+    local base=getprev(start) 
+    if base then
+      local basechar=ischar(base,currentfont)
+      if basechar then
+        if marks[basechar] then
+          while base do
+            base=getprev(base)
+            if base then
+              basechar=ischar(base,currentfont)
+              if basechar then
+                if not marks[basechar] then
+                  break
+                end
+              else
+                if trace_bugs then
+                  logwarning("%s: no base for mark %s, case %i",pref(dataset,sequence),gref(markchar),1)
+                end
+                return head,start,false
+              end
+            else
+              if trace_bugs then
+                logwarning("%s: no base for mark %s, case %i",pref(dataset,sequence),gref(markchar),2)
+              end
+              return head,start,false
+            end
+          end
+        end
+        local ba=markanchors[1][basechar]
+        if ba then
+          local ma=markanchors[2]
+          local dx,dy,bound=setmark(start,base,factor,rlmode,ba,ma,characters[basechar],false,checkmarks)
+          if trace_marks then
+            logprocess("%s, bound %s, anchoring mark %s to basechar %s => (%p,%p)",
+              pref(dataset,sequence),bound,gref(markchar),gref(basechar),dx,dy)
+          end
+          return head,start,true
+        elseif trace_bugs then
+          logwarning("%s: mark %s is not anchored to %s",pref(dataset,sequence),gref(markchar),gref(basechar))
+        end
+      elseif trace_bugs then
+        logwarning("%s: nothing preceding, case %i",pref(dataset,sequence),1)
+      end
+    elseif trace_bugs then
+      logwarning("%s: nothing preceding, case %i",pref(dataset,sequence),2)
+    end
+  elseif trace_bugs then
+    logwarning("%s: mark %s is no mark",pref(dataset,sequence),gref(markchar))
+  end
+  return head,start,false
+end
+function handlers.gpos_mark2ligature(head,start,dataset,sequence,markanchors,rlmode)
+  local markchar=getchar(start)
+  if marks[markchar] then
+    local base=getprev(start) 
+    if base then
+      local basechar=ischar(base,currentfont)
+      if basechar then
+        if marks[basechar] then
+          while base do
+            base=getprev(base)
+            if base then
+              basechar=ischar(base,currentfont)
+              if basechar then
+                if not marks[basechar] then
+                  break
+                end
+              else
+                if trace_bugs then
+                  logwarning("%s: no base for mark %s, case %i",pref(dataset,sequence),gref(markchar),1)
+                end
+                return head,start,false
+              end
+            else
+              if trace_bugs then
+                logwarning("%s: no base for mark %s, case %i",pref(dataset,sequence),gref(markchar),2)
+              end
+              return head,start,false
+            end
+          end
+        end
+        local ba=markanchors[1][basechar]
+        if ba then
+          local ma=markanchors[2]
+          if ma then
+            local index=getligaindex(start)
+            ba=ba[index]
+            if ba then
+              local dx,dy,bound=setmark(start,base,factor,rlmode,ba,ma,characters[basechar],false,checkmarks)
+              if trace_marks then
+                logprocess("%s, index %s, bound %s, anchoring mark %s to baselig %s at index %s => (%p,%p)",
+                  pref(dataset,sequence),index,bound,gref(markchar),gref(basechar),index,dx,dy)
+              end
+              return head,start,true
+            else
+              if trace_bugs then
+                logwarning("%s: no matching anchors for mark %s and baselig %s with index %a",pref(dataset,sequence),gref(markchar),gref(basechar),index)
+              end
+            end
+          end
+        elseif trace_bugs then
+          onetimemessage(currentfont,basechar,"no base anchors",report_fonts)
+        end
+      elseif trace_bugs then
+        logwarning("%s: prev node is no char, case %i",pref(dataset,sequence),1)
+      end
+    elseif trace_bugs then
+      logwarning("%s: prev node is no char, case %i",pref(dataset,sequence),2)
+    end
+  elseif trace_bugs then
+    logwarning("%s: mark %s is no mark",pref(dataset,sequence),gref(markchar))
+  end
+  return head,start,false
+end
+function handlers.gpos_mark2mark(head,start,dataset,sequence,markanchors,rlmode)
+  local markchar=getchar(start)
+  if marks[markchar] then
+    local base=getprev(start) 
+    local slc=getligaindex(start)
+    if slc then 
+      while base do
+        local blc=getligaindex(base)
+        if blc and blc~=slc then
+          base=getprev(base)
+        else
+          break
+        end
+      end
+    end
+    if base then
+      local basechar=ischar(base,currentfont)
+      if basechar then 
+        local ba=markanchors[1][basechar] 
+        if ba then
+          local ma=markanchors[2]
+          local dx,dy,bound=setmark(start,base,factor,rlmode,ba,ma,characters[basechar],true,checkmarks)
+          if trace_marks then
+            logprocess("%s, bound %s, anchoring mark %s to basemark %s => (%p,%p)",
+              pref(dataset,sequence),bound,gref(markchar),gref(basechar),dx,dy)
+          end
+          return head,start,true
+        end
+      end
+    end
+  elseif trace_bugs then
+    logwarning("%s: mark %s is no mark",pref(dataset,sequence),gref(markchar))
+  end
+  return head,start,false
+end
+function handlers.gpos_cursive(head,start,dataset,sequence,exitanchors,rlmode,step,i) 
+  local startchar=getchar(start)
+  if marks[startchar] then
+    if trace_cursive then
+      logprocess("%s: ignoring cursive for mark %s",pref(dataset,sequence),gref(startchar))
+    end
+  else
+    local nxt=getnext(start)
+    while nxt do
+      local nextchar=ischar(nxt,currentfont)
+      if not nextchar then
+        break
+      elseif marks[nextchar] then
+        nxt=getnext(nxt)
+      else
+        local exit=exitanchors[3]
+        if exit then
+          local entry=exitanchors[1][nextchar]
+          if entry then
+            entry=entry[2]
+            if entry then
+              local dx,dy,bound=setcursive(start,nxt,factor,rlmode,exit,entry,characters[startchar],characters[nextchar])
+              if trace_cursive then
+                logprocess("%s: moving %s to %s cursive (%p,%p) using bound %s in %s mode",pref(dataset,sequence),gref(startchar),gref(nextchar),dx,dy,bound,mref(rlmode))
+              end
+              return head,start,true
+            end
+          end
+        end
+        break
+      end
+    end
+  end
+  return head,start,false
+end
+local chainprocs={}
+local function logprocess(...)
+  if trace_steps then
+    registermessage(...)
+  end
+  report_subchain(...)
+end
+local logwarning=report_subchain
+local function logprocess(...)
+  if trace_steps then
+    registermessage(...)
+  end
+  report_chain(...)
+end
+local logwarning=report_chain
+local function reversesub(head,start,stop,dataset,sequence,replacements,rlmode)
+  local char=getchar(start)
+  local replacement=replacements[char]
+  if replacement then
+    if trace_singles then
+      logprocess("%s: single reverse replacement of %s by %s",cref(dataset,sequence),gref(char),gref(replacement))
+    end
+    resetinjection(start)
+    setchar(start,replacement)
+    return head,start,true
+  else
+    return head,start,false
+  end
+end
+chainprocs.reversesub=reversesub
+local function reportzerosteps(dataset,sequence)
+  logwarning("%s: no steps",cref(dataset,sequence))
+end
+local function reportmoresteps(dataset,sequence)
+  logwarning("%s: more than 1 step",cref(dataset,sequence))
+end
+function chainprocs.gsub_single(head,start,stop,dataset,sequence,currentlookup,chainindex)
+  local steps=currentlookup.steps
+  local nofsteps=currentlookup.nofsteps
+  if nofsteps>1 then
+    reportmoresteps(dataset,sequence)
+  end
+  if nofsteps==0 then
+    reportzerosteps(dataset,sequence)
+  else
+    local current=start
+    local mapping=steps[1].coverage
+    while current do
+      local currentchar=ischar(current)
+      if currentchar then
+        local replacement=mapping[currentchar]
+        if not replacement or replacement=="" then
+          if trace_bugs then
+            logwarning("%s: no single for %s",cref(dataset,sequence,chainindex),gref(currentchar))
+          end
+        else
+          if trace_singles then
+            logprocess("%s: replacing single %s by %s",cref(dataset,sequence,chainindex),gref(currentchar),gref(replacement))
+          end
+          resetinjection(current)
+          setchar(current,replacement)
+        end
+        return head,start,true
+      elseif currentchar==false then
+        break
+      elseif current==stop then
+        break
+      else
+        current=getnext(current)
+      end
+    end
+  end
+  return head,start,false
+end
+function chainprocs.gsub_multiple(head,start,stop,dataset,sequence,currentlookup)
+  local steps=currentlookup.steps
+  local nofsteps=currentlookup.nofsteps
+  if nofsteps>1 then
+    reportmoresteps(dataset,sequence)
+  end
+  if nofsteps==0 then
+    reportzerosteps(dataset,sequence)
+  else
+    local startchar=getchar(start)
+    local replacement=steps[1].coverage[startchar]
+    if not replacement or replacement=="" then
+      if trace_bugs then
+        logwarning("%s: no multiple for %s",cref(dataset,sequence),gref(startchar))
+      end
+    else
+      if trace_multiples then
+        logprocess("%s: replacing %s by multiple characters %s",cref(dataset,sequence),gref(startchar),gref(replacement))
+      end
+      return multiple_glyphs(head,start,replacement,sequence.flags[1],dataset[1])
+    end
+  end
+  return head,start,false
+end
+function chainprocs.gsub_alternate(head,start,stop,dataset,sequence,currentlookup)
+  local steps=currentlookup.steps
+  local nofsteps=currentlookup.nofsteps
+  if nofsteps>1 then
+    reportmoresteps(dataset,sequence)
+  end
+  if nofsteps==0 then
+    reportzerosteps(dataset,sequence)
+  else
+    local kind=dataset[4]
+    local what=dataset[1]
+    local value=what==true and tfmdata.shared.features[kind] or what 
+    local current=start
+    local mapping=steps[1].coverage
+    while current do
+      local currentchar=ischar(current)
+      if currentchar then
+        local alternatives=mapping[currentchar]
+        if alternatives then
+          local choice,comment=get_alternative_glyph(current,alternatives,value)
+          if choice then
+            if trace_alternatives then
+              logprocess("%s: replacing %s by alternative %a to %s, %s",cref(dataset,sequence),gref(currentchar),choice,gref(choice),comment)
+            end
+            resetinjection(start)
+            setchar(start,choice)
+          else
+            if trace_alternatives then
+              logwarning("%s: no variant %a for %s, %s",cref(dataset,sequence),value,gref(currentchar),comment)
+            end
+          end
+        end
+        return head,start,true
+      elseif currentchar==false then
+        break
+      elseif current==stop then
+        break
+      else
+        current=getnext(current)
+      end
+    end
+  end
+  return head,start,false
+end
+function chainprocs.gsub_ligature(head,start,stop,dataset,sequence,currentlookup,chainindex)
+  local steps=currentlookup.steps
+  local nofsteps=currentlookup.nofsteps
+  if nofsteps>1 then
+    reportmoresteps(dataset,sequence)
+  end
+  if nofsteps==0 then
+    reportzerosteps(dataset,sequence)
+  else
+    local startchar=getchar(start)
+    local ligatures=steps[1].coverage[startchar]
+    if not ligatures then
+      if trace_bugs then
+        logwarning("%s: no ligatures starting with %s",cref(dataset,sequence,chainindex),gref(startchar))
+      end
+    else
+      local current=getnext(start)
+      local discfound=false
+      local last=stop
+      local nofreplacements=1
+      local skipmark=currentlookup.flags[1] 
+      while current do
+        local id=getid(current)
+        if id==disc_code then
+          if not discfound then
+            discfound=current
+          end
+          if current==stop then
+            break 
+          else
+            current=getnext(current)
+          end
+        else
+          local schar=getchar(current)
+          if skipmark and marks[schar] then
+              current=getnext(current)
+          else
+            local lg=ligatures[schar]
+            if lg then
+              ligatures=lg
+              last=current
+              nofreplacements=nofreplacements+1
+              if current==stop then
+                break
+              else
+                current=getnext(current)
+              end
+            else
+              break
+            end
+          end
+        end
+      end
+      local ligature=ligatures.ligature
+      if ligature then
+        if chainindex then
+          stop=last
+        end
+        if trace_ligatures then
+          if start==stop then
+            logprocess("%s: replacing character %s by ligature %s case 3",cref(dataset,sequence,chainindex),gref(startchar),gref(ligature))
+          else
+            logprocess("%s: replacing character %s upto %s by ligature %s case 4",cref(dataset,sequence,chainindex),gref(startchar),gref(getchar(stop)),gref(ligature))
+          end
+        end
+        head,start=toligature(head,start,stop,ligature,dataset,sequence,skipmark,discfound)
+        return head,start,true,nofreplacements,discfound
+      elseif trace_bugs then
+        if start==stop then
+          logwarning("%s: replacing character %s by ligature fails",cref(dataset,sequence,chainindex),gref(startchar))
+        else
+          logwarning("%s: replacing character %s upto %s by ligature fails",cref(dataset,sequence,chainindex),gref(startchar),gref(getchar(stop)))
+        end
+      end
+    end
+  end
+  return head,start,false,0,false
+end
+function chainprocs.gpos_single(head,start,stop,dataset,sequence,currentlookup,rlmode,chainindex)
+  local steps=currentlookup.steps
+  local nofsteps=currentlookup.nofsteps
+  if nofsteps>1 then
+    reportmoresteps(dataset,sequence)
+  end
+  if nofsteps==0 then
+    reportzerosteps(dataset,sequence)
+  else
+    local startchar=getchar(start)
+    local step=steps[1]
+    local kerns=step.coverage[startchar]
+    if not kerns then
+    else
+      local format=step.format
+      if format=="single" then
+        local dx,dy,w,h=setposition(start,factor,rlmode,sequence.flags[4],kerns) 
+        if trace_kerns then
+          logprocess("%s: shifting single %s by %s (%p,%p) and correction (%p,%p)",cref(dataset,sequence),gref(startchar),format,dx,dy,w,h)
+        end
+      else 
+        local k=(format=="move" and setmove or setkern)(start,factor,rlmode,kerns,injection)
+        if trace_kerns then
+          logprocess("%s: shifting single %s by %s %p",cref(dataset,sequence),gref(startchar),format,k)
+        end
+      end
+    end
+  end
+  return head,start,false
+end
+function chainprocs.gpos_pair(head,start,stop,dataset,sequence,currentlookup,rlmode,chainindex) 
+  local steps=currentlookup.steps
+  local nofsteps=currentlookup.nofsteps
+  if nofsteps>1 then
+    reportmoresteps(dataset,sequence)
+  end
+  if nofsteps==0 then
+    reportzerosteps(dataset,sequence)
+  else
+    local snext=getnext(start)
+    if snext then
+      local startchar=getchar(start)
+      local step=steps[1]
+      local kerns=step.coverage[startchar] 
+      if kerns then
+        local prev=start
+        while snext do
+          local nextchar=ischar(snext,currentfont)
+          if not nextchar then
+            break
+          end
+          local krn=kerns[nextchar]
+          if not krn and marks[nextchar] then
+            prev=snext
+            snext=getnext(snext)
+          elseif not krn then
+            break
+          else
+            local format=step.format
+            if format=="pair" then
+              local a,b=krn[1],krn[2]
+              if a==true then
+              elseif a then
+                local x,y,w,h=setposition(start,factor,rlmode,sequence.flags[4],a,"injections") 
+                if trace_kerns then
+                  local startchar=getchar(start)
+                  logprocess("%s: shifting first of pair %s and %s by (%p,%p) and correction (%p,%p)",cref(dataset,sequence),gref(startchar),gref(nextchar),x,y,w,h)
+                end
+              end
+              if b==true then
+                start=snext 
+              elseif b then 
+                local x,y,w,h=setposition(snext,factor,rlmode,sequence.flags[4],b,"injections")
+                if trace_kerns then
+                  local startchar=getchar(start)
+                  logprocess("%s: shifting second of pair %s and %s by (%p,%p) and correction (%p,%p)",cref(dataset,sequence),gref(startchar),gref(nextchar),x,y,w,h)
+                end
+                start=snext 
+              elseif forcepairadvance then
+                start=snext 
+              end
+              return head,start,true
+            elseif krn~=0 then
+              local k=(format=="move" and setmove or setkern)(snext,factor,rlmode,krn)
+              if trace_kerns then
+                logprocess("%s: inserting %s %p between %s and %s",cref(dataset,sequence),format,k,gref(getchar(prev)),gref(nextchar))
+              end
+              return head,start,true
+            else
+              break
+            end
+          end
+        end
+      end
+    end
+  end
+  return head,start,false
+end
+function chainprocs.gpos_mark2base(head,start,stop,dataset,sequence,currentlookup,rlmode)
+  local steps=currentlookup.steps
+  local nofsteps=currentlookup.nofsteps
+  if nofsteps>1 then
+    reportmoresteps(dataset,sequence)
+  end
+  if nofsteps==0 then
+    reportzerosteps(dataset,sequence)
+  else
+    local markchar=getchar(start)
+    if marks[markchar] then
+      local markanchors=steps[1].coverage[markchar] 
+      if markanchors then
+        local base=getprev(start) 
+        if base then
+          local basechar=ischar(base,currentfont)
+          if basechar then
+            if marks[basechar] then
+              while base do
+                base=getprev(base)
+                if base then
+                  local basechar=ischar(base,currentfont)
+                  if basechar then
+                    if not marks[basechar] then
+                      break
+                    end
+                  else
+                    if trace_bugs then
+                      logwarning("%s: no base for mark %s, case %i",pref(dataset,sequence),gref(markchar),1)
+                    end
+                    return head,start,false
+                  end
+                else
+                  if trace_bugs then
+                    logwarning("%s: no base for mark %s, case %i",pref(dataset,sequence),gref(markchar),2)
+                  end
+                  return head,start,false
+                end
+              end
+            end
+            local ba=markanchors[1][basechar]
+            if ba then
+              local ma=markanchors[2]
+              if ma then
+                local dx,dy,bound=setmark(start,base,factor,rlmode,ba,ma,characters[basechar],false,checkmarks)
+                if trace_marks then
+                  logprocess("%s, bound %s, anchoring mark %s to basechar %s => (%p,%p)",
+                    cref(dataset,sequence),bound,gref(markchar),gref(basechar),dx,dy)
+                end
+                return head,start,true
+              end
+            end
+          elseif trace_bugs then
+            logwarning("%s: prev node is no char, case %i",cref(dataset,sequence),1)
+          end
+        elseif trace_bugs then
+          logwarning("%s: prev node is no char, case %i",cref(dataset,sequence),2)
+        end
+      elseif trace_bugs then
+        logwarning("%s: mark %s has no anchors",cref(dataset,sequence),gref(markchar))
+      end
+    elseif trace_bugs then
+      logwarning("%s: mark %s is no mark",cref(dataset,sequence),gref(markchar))
+    end
+  end
+  return head,start,false
+end
+function chainprocs.gpos_mark2ligature(head,start,stop,dataset,sequence,currentlookup,rlmode)
+  local steps=currentlookup.steps
+  local nofsteps=currentlookup.nofsteps
+  if nofsteps>1 then
+    reportmoresteps(dataset,sequence)
+  end
+  if nofsteps==0 then
+    reportzerosteps(dataset,sequence)
+  else
+    local markchar=getchar(start)
+    if marks[markchar] then
+      local markanchors=steps[1].coverage[markchar] 
+      if markanchors then
+        local base=getprev(start) 
+        if base then
+          local basechar=ischar(base,currentfont)
+          if basechar then
+            if marks[basechar] then
+              while base do
+                base=getprev(base)
+                if base then
+                  local basechar=ischar(base,currentfont)
+                  if basechar then
+                    if not marks[basechar] then
+                      break
+                    end
+                  else
+                    if trace_bugs then
+                      logwarning("%s: no base for mark %s, case %i",cref(dataset,sequence),markchar,1)
+                    end
+                    return head,start,false
+                  end
+                else
+                  if trace_bugs then
+                    logwarning("%s: no base for mark %s, case %i",cref(dataset,sequence),markchar,2)
+                  end
+                  return head,start,false
+                end
+              end
+            end
+            local ba=markanchors[1][basechar]
+            if ba then
+              local ma=markanchors[2]
+              if ma then
+                local index=getligaindex(start)
+                ba=ba[index]
+                if ba then
+                  local dx,dy,bound=setmark(start,base,factor,rlmode,ba,ma,characters[basechar],false,checkmarks)
+                  if trace_marks then
+                    logprocess("%s, bound %s, anchoring mark %s to baselig %s at index %s => (%p,%p)",
+                      cref(dataset,sequence),a or bound,gref(markchar),gref(basechar),index,dx,dy)
+                  end
+                  return head,start,true
+                end
+              end
+            end
+          elseif trace_bugs then
+            logwarning("%s, prev node is no char, case %i",cref(dataset,sequence),1)
+          end
+        elseif trace_bugs then
+          logwarning("%s, prev node is no char, case %i",cref(dataset,sequence),2)
+        end
+      elseif trace_bugs then
+        logwarning("%s, mark %s has no anchors",cref(dataset,sequence),gref(markchar))
+      end
+    elseif trace_bugs then
+      logwarning("%s, mark %s is no mark",cref(dataset,sequence),gref(markchar))
+    end
+  end
+  return head,start,false
+end
+function chainprocs.gpos_mark2mark(head,start,stop,dataset,sequence,currentlookup,rlmode)
+  local steps=currentlookup.steps
+  local nofsteps=currentlookup.nofsteps
+  if nofsteps>1 then
+    reportmoresteps(dataset,sequence)
+  end
+  if nofsteps==0 then
+    reportzerosteps(dataset,sequence)
+  else
+    local markchar=getchar(start)
+    if marks[markchar] then
+      local markanchors=steps[1].coverage[markchar] 
+      if markanchors then
+        local base=getprev(start) 
+        local slc=getligaindex(start)
+        if slc then 
+          while base do
+            local blc=getligaindex(base)
+            if blc and blc~=slc then
+              base=getprev(base)
+            else
+              break
+            end
+          end
+        end
+        if base then 
+          local basechar=ischar(base,currentfont)
+          if basechar then
+            local ba=markanchors[1][basechar]
+            if ba then
+              local ma=markanchors[2]
+              if ma then
+                local dx,dy,bound=setmark(start,base,factor,rlmode,ba,ma,characters[basechar],true,checkmarks)
+                if trace_marks then
+                  logprocess("%s, bound %s, anchoring mark %s to basemark %s => (%p,%p)",
+                    cref(dataset,sequence),bound,gref(markchar),gref(basechar),dx,dy)
+                end
+                return head,start,true
+              end
+            end
+          elseif trace_bugs then
+            logwarning("%s: prev node is no mark, case %i",cref(dataset,sequence),1)
+          end
+        elseif trace_bugs then
+          logwarning("%s: prev node is no mark, case %i",cref(dataset,sequence),2)
+        end
+      elseif trace_bugs then
+        logwarning("%s: mark %s has no anchors",cref(dataset,sequence),gref(markchar))
+      end
+    elseif trace_bugs then
+      logwarning("%s: mark %s is no mark",cref(dataset,sequence),gref(markchar))
+    end
+  end
+  return head,start,false
+end
+function chainprocs.gpos_cursive(head,start,stop,dataset,sequence,currentlookup,rlmode)
+  local steps=currentlookup.steps
+  local nofsteps=currentlookup.nofsteps
+  if nofsteps>1 then
+    reportmoresteps(dataset,sequence)
+  end
+  if nofsteps==0 then
+    reportzerosteps(dataset,sequence)
+  else
+    local startchar=getchar(start)
+    local exitanchors=steps[1].coverage[startchar] 
+    if exitanchors then
+      if marks[startchar] then
+        if trace_cursive then
+          logprocess("%s: ignoring cursive for mark %s",pref(dataset,sequence),gref(startchar))
+        end
+      else
+        local nxt=getnext(start)
+        while nxt do
+          local nextchar=ischar(nxt,currentfont)
+          if not nextchar then
+            break
+          elseif marks[nextchar] then
+            nxt=getnext(nxt)
+          else
+            local exit=exitanchors[3]
+            if exit then
+              local entry=exitanchors[1][nextchar]
+              if entry then
+                entry=entry[2]
+                if entry then
+                  local dx,dy,bound=setcursive(start,nxt,factor,rlmode,exit,entry,characters[startchar],characters[nextchar])
+                  if trace_cursive then
+                    logprocess("%s: moving %s to %s cursive (%p,%p) using bound %s in %s mode",pref(dataset,sequence),gref(startchar),gref(nextchar),dx,dy,bound,mref(rlmode))
+                  end
+                  return head,start,true
+                end
+              end
+            elseif trace_bugs then
+              onetimemessage(currentfont,startchar,"no entry anchors",report_fonts)
+            end
+            break
+          end
+        end
+      end
+    elseif trace_cursive and trace_details then
+      logprocess("%s, cursive %s is already done",pref(dataset,sequence),gref(getchar(start)),alreadydone)
+    end
+  end
+  return head,start,false
+end
+local function show_skip(dataset,sequence,char,ck,class)
+  logwarning("%s: skipping char %s, class %a, rule %a, lookuptype %a",cref(dataset,sequence),gref(char),class,ck[1],ck[8] or ck[2])
+end
+local userkern=nuts.pool and nuts.pool.newkern 
+do if not userkern then 
+  local thekern=nuts.new("kern",1) 
+  local setkern=nuts.setkern    
+  userkern=function(k)
+    local n=copy_node(thekern)
+    setkern(n,k)
+    return n
+  end
+end end
+local function checked(head)
+  local current=head
+  while current do
+    if getid(current)==glue_code then
+      local kern=userkern(getwidth(current))
+      if head==current then
+        local next=getnext(current)
+        if next then
+          setlink(kern,next)
+        end
+        flush_node(current)
+        head=kern
+        current=next
+      else
+        local prev,next=getboth(current)
+        setlink(prev,kern,next)
+        flush_node(current)
+        current=next
+      end
+    else
+      current=getnext(current)
+    end
+  end
+  return head
+end
+local function setdiscchecked(d,pre,post,replace)
+  if pre   then pre=checked(pre)   end
+  if post  then post=checked(post)  end
+  if replace then replace=checked(replace) end
+  setdisc(d,pre,post,replace)
+end
+local noflags={ false,false,false,false }
+local function chainrun(head,start,last,dataset,sequence,rlmode,ck,skipped)
+  local size=ck[5]-ck[4]+1
+  local chainlookups=ck[6]
+  local done=false
+  if chainlookups then
+    if size==1 then
+      local chainlookup=chainlookups[1]
+      for j=1,#chainlookup do
+        local chainstep=chainlookup[j]
+        local chainkind=chainstep.type
+        local chainproc=chainprocs[chainkind]
+        if chainproc then
+          local ok
+          head,start,ok=chainproc(head,start,last,dataset,sequence,chainstep,rlmode,1)
+          if ok then
+            done=true
+          end
+        else
+          logprocess("%s: %s is not yet supported (1)",cref(dataset,sequence),chainkind)
+        end
+      end
+     else
+      local skipmark
+      local skipligature
+      local skipbase
+      local markclass
+      if skipped then
+        local flags=sequence.flags or noflags
+        skipmark=flags[1]
+        skipligature=flags[2]
+        skipbase=flags[3]
+        markclass=sequence.markclass
+      end
+      local i=1
+      local laststart=start
+      local nofchainlookups=#chainlookups 
+      while start do
+        if skipped then 
+          while start do
+            local char,id=ischar(start,currentfont)
+            if char then
+              local class=classes[char]
+              if class then
+                if class==skipmark or class==skipligature or class==skipbase or (markclass and class=="mark" and not markclass[char]) then
+                  start=getnext(start)
+                else
+                  break
+                end
+              else
+                break
+              end
+            else
+              break
+            end
+          end
+        end
+        local chainlookup=chainlookups[i]
+        if chainlookup then
+          for j=1,#chainlookup do
+            local chainstep=chainlookup[j]
+            local chainkind=chainstep.type
+            local chainproc=chainprocs[chainkind]
+            if chainproc then
+              local ok,n
+              head,start,ok,n=chainproc(head,start,last,dataset,sequence,chainstep,rlmode,i)
+              if ok then
+                done=true
+                if n and n>1 and i+n>nofchainlookups then
+                  break
+                end
+              end
+            else
+              logprocess("%s: %s is not yet supported (2)",cref(dataset,sequence),chainkind)
+            end
+          end
+        end
+        i=i+1
+        if i>size or not start then
+          break
+        elseif start then
+          laststart=start
+          start=getnext(start)
+        end
+      end
+      if not start then
+        start=laststart
+      end
+    end
+  else
+    local replacements=ck[7]
+    if replacements then
+      head,start,done=reversesub(head,start,last,dataset,sequence,replacements,rlmode)
+    else
+      done=true
+      if trace_contexts then
+        logprocess("%s: skipping match",cref(dataset,sequence))
+      end
+    end
+  end
+  return head,start,done
+end
+local function chaindisk(head,start,dataset,sequence,rlmode,ck,skipped)
+  if not start then
+    return head,start,false
+  end
+  local startishead=start==head
+  local seq=ck[3]
+  local f=ck[4]
+  local l=ck[5]
+  local s=#seq
+  local done=false
+  local sweepnode=sweepnode
+  local sweeptype=sweeptype
+  local sweepoverflow=false
+  local keepdisc=not sweepnode
+  local lookaheaddisc=nil
+  local backtrackdisc=nil
+  local current=start
+  local last=start
+  local prev=getprev(start)
+  local hasglue=false
+  local i=f
+  while i<=l do
+    local id=getid(current)
+    if id==glyph_code then
+      i=i+1
+      last=current
+      current=getnext(current)
+    elseif id==glue_code then
+      i=i+1
+      last=current
+      current=getnext(current)
+      hasglue=true
+    elseif id==disc_code then
+      if keepdisc then
+        keepdisc=false
+        lookaheaddisc=current
+        local replace=getfield(current,"replace")
+        if not replace then
+          sweepoverflow=true
+          sweepnode=current
+          current=getnext(current)
+        else
+          while replace and i<=l do
+            if getid(replace)==glyph_code then
+              i=i+1
+            end
+            replace=getnext(replace)
+          end
+          current=getnext(replace)
+        end
+        last=current
+      else
+        head,current=flattendisk(head,current)
+      end
+    else
+      last=current
+      current=getnext(current)
+    end
+    if current then
+    elseif sweepoverflow then
+      break
+    elseif sweeptype=="post" or sweeptype=="replace" then
+      current=getnext(sweepnode)
+      if current then
+        sweeptype=nil
+        sweepoverflow=true
+      else
+        break
+      end
+    else
+      break 
+    end
+  end
+  if sweepoverflow then
+    local prev=current and getprev(current)
+    if not current or prev~=sweepnode then
+      local head=getnext(sweepnode)
+      local tail=nil
+      if prev then
+        tail=prev
+        setprev(current,sweepnode)
+      else
+        tail=find_node_tail(head)
+      end
+      setnext(sweepnode,current)
+      setprev(head)
+      setnext(tail)
+      appenddisc(sweepnode,head)
+    end
+  end
+  if l<s then
+    local i=l
+    local t=sweeptype=="post" or sweeptype=="replace"
+    while current and i<s do
+      local id=getid(current)
+      if id==glyph_code then
+        i=i+1
+        current=getnext(current)
+      elseif id==glue_code then
+        i=i+1
+        current=getnext(current)
+        hasglue=true
+      elseif id==disc_code then
+        if keepdisc then
+          keepdisc=false
+          if notmatchpre[current]~=notmatchreplace[current] then
+            lookaheaddisc=current
+          end
+          local replace=getfield(current,"replace")
+          while replace and i<s do
+            if getid(replace)==glyph_code then
+              i=i+1
+            end
+            replace=getnext(replace)
+          end
+          current=getnext(current)
+        elseif notmatchpre[current]~=notmatchreplace[current] then
+          head,current=flattendisk(head,current)
+        else
+          current=getnext(current) 
+        end
+      else
+        current=getnext(current)
+      end
+      if not current and t then
+        current=getnext(sweepnode)
+        if current then
+          sweeptype=nil
+        end
+      end
+    end
+  end
+  if f>1 then
+    local current=prev
+    local i=f
+    local t=sweeptype=="pre" or sweeptype=="replace"
+    if not current and t and current==checkdisk then
+      current=getprev(sweepnode)
+    end
+    while current and i>1 do 
+      local id=getid(current)
+      if id==glyph_code then
+        i=i-1
+      elseif id==glue_code then
+        i=i-1
+        hasglue=true
+      elseif id==disc_code then
+        if keepdisc then
+          keepdisc=false
+          if notmatchpost[current]~=notmatchreplace[current] then
+            backtrackdisc=current
+          end
+          local replace=getfield(current,"replace")
+          while replace and i>1 do
+            if getid(replace)==glyph_code then
+              i=i-1
+            end
+            replace=getnext(replace)
+          end
+        elseif notmatchpost[current]~=notmatchreplace[current] then
+          head,current=flattendisk(head,current)
+        end
+      end
+      current=getprev(current)
+      if t and current==checkdisk then
+        current=getprev(sweepnode)
+      end
+    end
+  end
+  local done=false
+  if lookaheaddisc then
+    local cf=start
+    local cl=getprev(lookaheaddisc)
+    local cprev=getprev(start)
+    local insertedmarks=0
+    while cprev do
+      local char=ischar(cf,currentfont)
+      if char and marks[char] then
+        insertedmarks=insertedmarks+1
+        cf=cprev
+        startishead=cf==head
+        cprev=getprev(cprev)
+      else
+        break
+      end
+    end
+    setlink(cprev,lookaheaddisc)
+    setprev(cf)
+    setnext(cl)
+    if startishead then
+      head=lookaheaddisc
+    end
+    local pre,post,replace=getdisc(lookaheaddisc)
+    local new=copy_node_list(cf)
+    local cnew=new
+    if pre then
+      setlink(find_node_tail(cf),pre)
+    end
+    if replace then
+      local tail=find_node_tail(new)
+      setlink(tail,replace)
+    end
+    for i=1,insertedmarks do
+      cnew=getnext(cnew)
+    end
+    cl=start
+    local clast=cnew
+    for i=f,l do
+      cl=getnext(cl)
+      clast=getnext(clast)
+    end
+    if not notmatchpre[lookaheaddisc] then
+      local ok=false
+      cf,start,ok=chainrun(cf,start,cl,dataset,sequence,rlmode,ck,skipped)
+      if ok then
+        done=true
+      end
+    end
+    if not notmatchreplace[lookaheaddisc] then
+      local ok=false
+      new,cnew,ok=chainrun(new,cnew,clast,dataset,sequence,rlmode,ck,skipped)
+      if ok then
+        done=true
+      end
+    end
+    if hasglue then
+      setdiscchecked(lookaheaddisc,cf,post,new)
+    else
+      setdisc(lookaheaddisc,cf,post,new)
+    end
+    start=getprev(lookaheaddisc)
+    sweephead[cf]=getnext(clast) or false
+    sweephead[new]=getnext(cl) or false
+  elseif backtrackdisc then
+    local cf=getnext(backtrackdisc)
+    local cl=start
+    local cnext=getnext(start)
+    local insertedmarks=0
+    while cnext do
+      local char=ischar(cnext,currentfont)
+      if char and marks[char] then
+        insertedmarks=insertedmarks+1
+        cl=cnext
+        cnext=getnext(cnext)
+      else
+        break
+      end
+    end
+    if cnext then
+      setprev(cnext,backtrackdisc)
+    end
+    setnext(backtrackdisc,cnext)
+    setprev(cf)
+    setnext(cl)
+    local pre,post,replace,pretail,posttail,replacetail=getdisc(backtrackdisc,true)
+    local new=copy_node_list(cf)
+    local cnew=find_node_tail(new)
+    for i=1,insertedmarks do
+      cnew=getprev(cnew)
+    end
+    local clast=cnew
+    for i=f,l do
+      clast=getnext(clast)
+    end
+    if not notmatchpost[backtrackdisc] then
+      local ok=false
+      cf,start,ok=chainrun(cf,start,last,dataset,sequence,rlmode,ck,skipped)
+      if ok then
+        done=true
+      end
+    end
+    if not notmatchreplace[backtrackdisc] then
+      local ok=false
+      new,cnew,ok=chainrun(new,cnew,clast,dataset,sequence,rlmode,ck,skipped)
+      if ok then
+        done=true
+      end
+    end
+    if post then
+      setlink(posttail,cf)
+    else
+      post=cf
+    end
+    if replace then
+      setlink(replacetail,new)
+    else
+      replace=new
+    end
+    if hasglue then
+      setdiscchecked(backtrackdisc,pre,post,replace)
+    else
+      setdisc(backtrackdisc,pre,post,replace)
+    end
+    start=getprev(backtrackdisc)
+    sweephead[post]=getnext(clast) or false
+    sweephead[replace]=getnext(last) or false
+  else
+    local ok=false
+    head,start,ok=chainrun(head,start,last,dataset,sequence,rlmode,ck,skipped)
+    if ok then
+      done=true
+    end
+  end
+  return head,start,done
+end
+local function chaintrac(head,start,dataset,sequence,rlmode,ck,skipped,match)
+  local rule=ck[1]
+  local lookuptype=ck[8] or ck[2]
+  local nofseq=#ck[3]
+  local first=ck[4]
+  local last=ck[5]
+  local char=getchar(start)
+  logwarning("%s: rule %s %s at char %s for (%s,%s,%s) chars, lookuptype %a",
+    cref(dataset,sequence),rule,match and "matches" or "nomatch",gref(char),first-1,last-first+1,nofseq-last,lookuptype)
+end
+local function handle_contextchain(head,start,dataset,sequence,contexts,rlmode)
+  local sweepnode=sweepnode
+  local sweeptype=sweeptype
+  local currentfont=currentfont
+  local diskseen=false
+  local checkdisc=sweeptype and getprev(head)
+  local flags=sequence.flags or noflags
+  local done=false
+  local markclass=sequence.markclass
+  local skipmark=flags[1]
+  local skipligature=flags[2]
+  local skipbase=flags[3]
+  local skipsome=flags[5]
+  local skipped=false
+  local startprev,
+     startnext=getboth(start)
+  for k=1,#contexts do 
+    local match=true
+    local current=start
+    local last=start
+    local ck=contexts[k]
+    local seq=ck[3]
+    local s=#seq
+    if s==1 then
+      local char=ischar(current,currentfont)
+      if char and not seq[1][char] then
+        match=false
+      end
+    else
+      local f=ck[4]
+      local l=ck[5]
+      if l>f then
+        local discfound 
+        local n=f+1
+        last=startnext 
+        while n<=l do
+          if not last and (sweeptype=="post" or sweeptype=="replace") then
+            last=getnext(sweepnode)
+            sweeptype=nil
+          end
+          if last then
+            local char,id=ischar(last,currentfont)
+            if char then
+              if skipsome then
+                local class=classes[char]
+                if class==skipmark or class==skipligature or class==skipbase or (markclass and class=="mark" and not markclass[char]) then
+                  skipped=true
+                  if trace_skips then
+                    show_skip(dataset,sequence,char,ck,class)
+                  end
+                  last=getnext(last)
+                elseif seq[n][char] then
+                  if n<l then
+                    last=getnext(last)
+                  end
+                  n=n+1
+                else
+                  if discfound then
+                    notmatchreplace[discfound]=true
+                    if notmatchpre[discfound] then
+                      match=false
+                    end
+                  else
+                    match=false
+                  end
+                  break
+                end
+              else
+                if seq[n][char] then
+                  if n<l then
+                    last=getnext(last)
+                  end
+                  n=n+1
+                else
+                  if discfound then
+                    notmatchreplace[discfound]=true
+                    if notmatchpre[discfound] then
+                      match=false
+                    end
+                  else
+                    match=false
+                  end
+                  break
+                end
+              end
+            elseif char==false then
+              if discfound then
+                notmatchreplace[discfound]=true
+                if notmatchpre[discfound] then
+                  match=false
+                end
+              else
+                match=false
+              end
+              break
+            elseif id==disc_code then
+              diskseen=true
+              discfound=last
+              notmatchpre[last]=nil
+              notmatchpost[last]=true
+              notmatchreplace[last]=nil
+              local pre,post,replace=getdisc(last)
+              if pre then
+                local n=n
+                while pre do
+                  if seq[n][getchar(pre)] then
+                    n=n+1
+                    if n>l then
+                      break
+                    end
+                    pre=getnext(pre)
+                  else
+                    notmatchpre[last]=true
+                    break
+                  end
+                end
+                if n<=l then
+                  notmatchpre[last]=true
+                end
+              else
+                notmatchpre[last]=true
+              end
+              if replace then
+                while replace do
+                  if seq[n][getchar(replace)] then
+                    n=n+1
+                    if n>l then
+                      break
+                    end
+                    replace=getnext(replace)
+                  else
+                    notmatchreplace[last]=true
+                    if notmatchpre[last] then
+                      match=false
+                    end
+                    break
+                  end
+                end
+                if notmatchpre[last] then
+                  match=false
+                end
+              end
+              last=getnext(last)
+            else
+              match=false
+              break
+            end
+          else
+            match=false
+            break
+          end
+        end
+      end
+      if match and f>1 then
+        if startprev then
+          local prev=startprev
+          if prev==checkdisc and (sweeptype=="pre" or sweeptype=="replace") then
+            prev=getprev(sweepnode)
+          end
+          if prev then
+            local discfound 
+            local n=f-1
+            while n>=1 do
+              if prev then
+                local char,id=ischar(prev,currentfont)
+                if char then
+                  if skipsome then
+                    local class=classes[char]
+                    if class==skipmark or class==skipligature or class==skipbase or (markclass and class=="mark" and not markclass[char]) then
+                      skipped=true
+                      if trace_skips then
+                        show_skip(dataset,sequence,char,ck,class)
+                      end
+                      prev=getprev(prev)
+                    elseif seq[n][char] then
+                      if n>1 then
+                        prev=getprev(prev)
+                      end
+                      n=n-1
+                    else
+                      if discfound then
+                        notmatchreplace[discfound]=true
+                        if notmatchpost[discfound] then
+                          match=false
+                        end
+                      else
+                        match=false
+                      end
+                      break
+                    end
+                  else
+                    if seq[n][char] then
+                      if n>1 then
+                        prev=getprev(prev)
+                      end
+                      n=n-1
+                    else
+                      if discfound then
+                        notmatchreplace[discfound]=true
+                        if notmatchpost[discfound] then
+                          match=false
+                        end
+                      else
+                        match=false
+                      end
+                      break
+                    end
+                  end
+                elseif char==false then
+                  if discfound then
+                    notmatchreplace[discfound]=true
+                    if notmatchpost[discfound] then
+                      match=false
+                    end
+                  else
+                    match=false
+                  end
+                  break
+                elseif id==disc_code then
+                  diskseen=true
+                  discfound=prev
+                  notmatchpre[prev]=true
+                  notmatchpost[prev]=nil
+                  notmatchreplace[prev]=nil
+                  local pre,post,replace,pretail,posttail,replacetail=getdisc(prev,true)
+                  if pre~=start and post~=start and replace~=start then
+                    if post then
+                      local n=n
+                      while posttail do
+                        if seq[n][getchar(posttail)] then
+                          n=n-1
+                          if posttail==post then
+                            break
+                          else
+                            if n<1 then
+                              break
+                            end
+                            posttail=getprev(posttail)
+                          end
+                        else
+                          notmatchpost[prev]=true
+                          break
+                        end
+                      end
+                      if n>=1 then
+                        notmatchpost[prev]=true
+                      end
+                    else
+                      notmatchpost[prev]=true
+                    end
+                    if replace then
+                      while replacetail do
+                        if seq[n][getchar(replacetail)] then
+                          n=n-1
+                          if replacetail==replace then
+                            break
+                          else
+                            if n<1 then
+                              break
+                            end
+                            replacetail=getprev(replacetail)
+                          end
+                        else
+                          notmatchreplace[prev]=true
+                          if notmatchpost[prev] then
+                            match=false
+                          end
+                          break
+                        end
+                      end
+                      if not match then
+                        break
+                      end
+                    end
+                  end
+                  prev=getprev(prev)
+                elseif id==glue_code then
+                  local sn=seq[n]
+                  if (sn[32] and spaces[prev]) or sn[0xFFFC] then
+                    n=n-1
+                    prev=getprev(prev)
+                  else
+                    match=false
+                    break
+                  end
+                elseif seq[n][0xFFFC] then
+                  n=n-1
+                  prev=getprev(prev)
+                else
+                  match=false
+                  break
+                end
+              else
+                match=false
+                break
+              end
+            end
+          else
+            match=false
+          end
+        else
+          match=false
+        end
+      end
+      if match and s>l then
+        local current=last and getnext(last)
+        if not current and (sweeptype=="post" or sweeptype=="replace") then
+          current=getnext(sweepnode)
+        end
+        if current then
+          local discfound
+          local n=l+1
+          while n<=s do
+            if current then
+              local char,id=ischar(current,currentfont)
+              if char then
+                if skipsome then
+                  local class=classes[char]
+                  if class==skipmark or class==skipligature or class==skipbase or (markclass and class=="mark" and not markclass[char]) then
+                    skipped=true
+                    if trace_skips then
+                      show_skip(dataset,sequence,char,ck,class)
+                    end
+                    current=getnext(current) 
+                  elseif seq[n][char] then
+                    if n<s then 
+                      current=getnext(current) 
+                    end
+                    n=n+1
+                  else
+                    if discfound then
+                      notmatchreplace[discfound]=true
+                      if notmatchpre[discfound] then
+                        match=false
+                      end
+                    else
+                      match=false
+                    end
+                    break
+                  end
+                else
+                  if seq[n][char] then
+                    if n<s then 
+                      current=getnext(current) 
+                    end
+                    n=n+1
+                  else
+                    if discfound then
+                      notmatchreplace[discfound]=true
+                      if notmatchpre[discfound] then
+                        match=false
+                      end
+                    else
+                      match=false
+                    end
+                    break
+                  end
+                end
+              elseif char==false then
+                if discfound then
+                  notmatchreplace[discfound]=true
+                  if notmatchpre[discfound] then
+                    match=false
+                  end
+                else
+                  match=false
+                end
+                break
+              elseif id==disc_code then
+                diskseen=true
+                discfound=current
+                notmatchpre[current]=nil
+                notmatchpost[current]=true
+                notmatchreplace[current]=nil
+                local pre,post,replace=getdisc(current)
+                if pre then
+                  local n=n
+                  while pre do
+                    if seq[n][getchar(pre)] then
+                      n=n+1
+                      if n>s then
+                        break
+                      end
+                      pre=getnext(pre)
+                    else
+                      notmatchpre[current]=true
+                      break
+                    end
+                  end
+                  if n<=s then
+                    notmatchpre[current]=true
+                  end
+                else
+                  notmatchpre[current]=true
+                end
+                if replace then
+                  while replace do
+                    if seq[n][getchar(replace)] then
+                      n=n+1
+                      if n>s then
+                        break
+                      end
+                      replace=getnext(replace)
+                    else
+                      notmatchreplace[current]=true
+                      if not notmatchpre[current] then
+                        match=false
+                      end
+                      break
+                    end
+                  end
+                  if not match then
+                    break
+                  end
+                else
+                end
+                current=getnext(current)
+              elseif id==glue_code then
+                local sn=seq[n]
+                if (sn[32] and spaces[current]) or sn[0xFFFC] then
+                  n=n+1
+                  current=getnext(current)
+                else
+                  match=false
+                  break
+                end
+              elseif seq[n][0xFFFC] then
+                n=n+1
+                current=getnext(current)
+              else
+                match=false
+                break
+              end
+            else
+              match=false
+              break
+            end
+          end
+        else
+          match=false
+        end
+      end
+    end
+    if match then
+      if trace_contexts then
+        chaintrac(head,start,dataset,sequence,rlmode,ck,skipped,true)
+      end
+      if diskseen or sweepnode then
+        head,start,done=chaindisk(head,start,dataset,sequence,rlmode,ck,skipped)
+      else
+        head,start,done=chainrun(head,start,last,dataset,sequence,rlmode,ck,skipped)
+      end
+      if done then
+        break
+      else
+      end
+    end
+  end
+  if diskseen then
+    notmatchpre={}
+    notmatchpost={}
+    notmatchreplace={}
+  end
+  return head,start,done
+end
+local function optimized_handle_contextchain(head,start,dataset,sequence,contexts,rlmode)
+  local sweepnode=sweepnode
+  local sweeptype=sweeptype
+  local postreplace
+  local prereplace
+  local checkdisc
+  local diskseen 
+  if sweeptype then
+    if sweeptype=="replace" then
+      postreplace=true
+      prereplace=true
+    else
+      postreplace=sweeptype=="post"
+      prereplace=sweeptype=="pre"
+    end
+    checkdisc=getprev(head)
+  end
+  local currentfont=currentfont
+  local flags=sequence.flags or noflags
+  local skipsome=flags[5]
+  local skipmark
+  local skipligature
+  local skipbase
+  local markclass
+  if skipsome then
+    skipmark=flags[1]
+    skipligature=flags[2]
+    skipbase=flags[3]
+    markclass=sequence.markclass
+  end
+  local skipped  
+  local startprev,
+     startnext=getboth(start)
+  local done   
+  for k=1,contexts.n do 
+    local current=start
+    local last=start
+    local ck=contexts[k]
+    local seq=ck[3]
+    local s=seq.n
+    if s==1 then
+      local char=ischar(current,currentfont)
+      if char and not seq[1][char] then
+        goto next
+      end
+    else
+      local f=ck[4]
+      local l=ck[5]
+      if l>f then
+        local discfound 
+        local n=f+1
+        last=startnext 
+        while n<=l do
+          if not last and postreplace then
+            last=getnext(sweepnode)
+            sweeptype=nil
+          end
+          if last then
+            local char,id=ischar(last,currentfont)
+            if char then
+              if skipsome then
+                local class=classes[char]
+                if class==skipmark or (markclass and class=="mark" and not markclass[char]) or class==skipligature or class==skipbase then
+                  skipped=true
+                  if trace_skips then
+                    show_skip(dataset,sequence,char,ck,class)
+                  end
+                  last=getnext(last)
+                elseif seq[n][char] then
+                  if n<l then
+                    last=getnext(last)
+                  end
+                  n=n+1
+                else
+                  if discfound then
+                    notmatchreplace[discfound]=true
+                    if notmatchpre[discfound] then
+                      goto next
+                    end
+                  else
+                    goto next
+                  end
+                  break
+                end
+              else
+                if seq[n][char] then
+                  if n<l then
+                    last=getnext(last)
+                  end
+                  n=n+1
+                else
+                  if discfound then
+                    notmatchreplace[discfound]=true
+                    if notmatchpre[discfound] then
+                      goto next
+                    end
+                  else
+                    goto next
+                  end
+                  break
+                end
+              end
+            elseif char==false then
+              if discfound then
+                notmatchreplace[discfound]=true
+                if notmatchpre[discfound] then
+                  goto next
+                end
+              else
+                goto next
+              end
+              break
+            elseif id==disc_code then
+              diskseen=true
+              discfound=last
+              notmatchpre[last]=nil
+              notmatchpost[last]=true
+              notmatchreplace[last]=nil
+              local pre,post,replace=getdisc(last)
+              if pre then
+                local n=n
+                while pre do
+                  if seq[n][getchar(pre)] then
+                    n=n+1
+                    if n>l then
+                      break
+                    end
+                    pre=getnext(pre)
+                  else
+                    notmatchpre[last]=true
+                    break
+                  end
+                end
+                if n<=l then
+                  notmatchpre[last]=true
+                end
+              else
+                notmatchpre[last]=true
+              end
+              if replace then
+                while replace do
+                  if seq[n][getchar(replace)] then
+                    n=n+1
+                    if n>l then
+                      break
+                    end
+                    replace=getnext(replace)
+                  else
+                    notmatchreplace[last]=true
+                    if notmatchpre[last] then
+                      goto next
+                    end
+                    break
+                  end
+                end
+                if notmatchpre[last] then
+                  goto next
+                end
+              end
+              last=getnext(last)
+            else
+              goto next
+            end
+          else
+            goto next
+          end
+        end
+      end
+      if f>1 then
+        if startprev then
+          local prev=startprev
+          if prereplace and prev==checkdisc then
+            prev=getprev(sweepnode)
+          end
+          if prev then
+            local discfound 
+            local n=f-1
+            while n>=1 do
+              if prev then
+                local char,id=ischar(prev,currentfont)
+                if char then
+                  if skipsome then
+                    local class=classes[char]
+                    if class==skipmark or (markclass and class=="mark" and not markclass[char]) or class==skipligature or class==skipbase then
+                      skipped=true
+                      if trace_skips then
+                        show_skip(dataset,sequence,char,ck,class)
+                      end
+                      prev=getprev(prev)
+                    elseif seq[n][char] then
+                      if n>1 then
+                        prev=getprev(prev)
+                      end
+                      n=n-1
+                    else
+                      if discfound then
+                        notmatchreplace[discfound]=true
+                        if notmatchpost[discfound] then
+                          goto next
+                        end
+                      else
+                        goto next
+                      end
+                      break
+                    end
+                  else
+                    if seq[n][char] then
+                      if n>1 then
+                        prev=getprev(prev)
+                      end
+                      n=n-1
+                    else
+                      if discfound then
+                        notmatchreplace[discfound]=true
+                        if notmatchpost[discfound] then
+                          goto next
+                        end
+                      else
+                        goto next
+                      end
+                      break
+                    end
+                  end
+                elseif char==false then
+                  if discfound then
+                    notmatchreplace[discfound]=true
+                    if notmatchpost[discfound] then
+                      goto next
+                    end
+                  else
+                    goto next
+                  end
+                  break
+                elseif id==disc_code then
+                  diskseen=true
+                  discfound=prev
+                  notmatchpre[prev]=true
+                  notmatchpost[prev]=nil
+                  notmatchreplace[prev]=nil
+                  local pre,post,replace,pretail,posttail,replacetail=getdisc(prev,true)
+                  if pre~=start and post~=start and replace~=start then
+                    if post then
+                      local n=n
+                      while posttail do
+                        if seq[n][getchar(posttail)] then
+                          n=n-1
+                          if posttail==post then
+                            break
+                          else
+                            if n<1 then
+                              break
+                            end
+                            posttail=getprev(posttail)
+                          end
+                        else
+                          notmatchpost[prev]=true
+                          break
+                        end
+                      end
+                      if n>=1 then
+                        notmatchpost[prev]=true
+                      end
+                    else
+                      notmatchpost[prev]=true
+                    end
+                    if replace then
+                      while replacetail do
+                        if seq[n][getchar(replacetail)] then
+                          n=n-1
+                          if replacetail==replace then
+                            break
+                          else
+                            if n<1 then
+                              break
+                            end
+                            replacetail=getprev(replacetail)
+                          end
+                        else
+                          notmatchreplace[prev]=true
+                          if notmatchpost[prev] then
+                            goto next
+                          end
+                          break
+                        end
+                      end
+                    end
+                  end
+                  prev=getprev(prev)
+                elseif id==glue_code then
+                  local sn=seq[n]
+                  if (sn[32] and spaces[prev]) or sn[0xFFFC] then
+                    n=n-1
+                    prev=getprev(prev)
+                  else
+                    goto next
+                  end
+                elseif seq[n][0xFFFC] then
+                  n=n-1
+                  prev=getprev(prev)
+                else
+                  goto next
+                end
+              else
+                goto next
+              end
+            end
+          else
+            goto next
+          end
+        else
+          goto next
+        end
+      end
+      if s>l then
+        local current=last and getnext(last)
+        if not current and postreplace then
+          current=getnext(sweepnode)
+        end
+        if current then
+          local discfound 
+          local n=l+1
+          while n<=s do
+            if current then
+              local char,id=ischar(current,currentfont)
+              if char then
+                if skipsome then
+                  local class=classes[char]
+                  if class==skipmark or (markclass and class=="mark" and not markclass[char]) or class==skipligature or class==skipbase then
+                    skipped=true
+                    if trace_skips then
+                      show_skip(dataset,sequence,char,ck,class)
+                    end
+                    current=getnext(current) 
+                  elseif seq[n][char] then
+                    if n<s then 
+                      current=getnext(current) 
+                    end
+                    n=n+1
+                  else
+                    if discfound then
+                      notmatchreplace[discfound]=true
+                      if notmatchpre[discfound] then
+                        goto next
+                      end
+                    else
+                      goto next
+                    end
+                    break
+                  end
+                else
+                  if seq[n][char] then
+                    if n<s then 
+                      current=getnext(current) 
+                    end
+                    n=n+1
+                  else
+                    if discfound then
+                      notmatchreplace[discfound]=true
+                      if notmatchpre[discfound] then
+                        goto next
+                      end
+                    else
+                      goto next
+                    end
+                    break
+                  end
+                end
+              elseif char==false then
+                if discfound then
+                  notmatchreplace[discfound]=true
+                  if notmatchpre[discfound] then
+                    goto next
+                  end
+                else
+                  goto next
+                end
+                break
+              elseif id==disc_code then
+                diskseen=true
+                discfound=current
+                notmatchpre[current]=nil
+                notmatchpost[current]=true
+                notmatchreplace[current]=nil
+                local pre,post,replace=getdisc(current)
+                if pre then
+                  local n=n
+                  while pre do
+                    if seq[n][getchar(pre)] then
+                      n=n+1
+                      if n>s then
+                        break
+                      end
+                      pre=getnext(pre)
+                    else
+                      notmatchpre[current]=true
+                      break
+                    end
+                  end
+                  if n<=s then
+                    notmatchpre[current]=true
+                  end
+                else
+                  notmatchpre[current]=true
+                end
+                if replace then
+                  while replace do
+                    if seq[n][getchar(replace)] then
+                      n=n+1
+                      if n>s then
+                        break
+                      end
+                      replace=getnext(replace)
+                    else
+                      notmatchreplace[current]=true
+                      if not notmatchpre[current] then
+                        goto next
+                      end
+                      break
+                    end
+                  end
+                else
+                end
+                current=getnext(current)
+              elseif id==glue_code then
+                local sn=seq[n]
+                if (sn[32] and spaces[current]) or sn[0xFFFC] then
+                  n=n+1
+                  current=getnext(current)
+                else
+                  goto next
+                end
+              elseif seq[n][0xFFFC] then
+                n=n+1
+                current=getnext(current)
+              else
+                goto next
+              end
+            else
+              goto next
+            end
+          end
+        else
+          goto next
+        end
+      end
+    end
+    if trace_contexts then
+      chaintrac(head,start,dataset,sequence,rlmode,ck,skipped,true)
+    end
+    if diskseen or sweepnode then
+      head,start,done=chaindisk(head,start,dataset,sequence,rlmode,ck,skipped)
+    else
+      head,start,done=chainrun(head,start,last,dataset,sequence,rlmode,ck,skipped)
+    end
+    if done then
+      break
+    end
+    ::next::
+  end
+  if diskseen then
+    notmatchpre={}
+    notmatchpost={}
+    notmatchreplace={}
+  end
+  return head,start,done
+end
+directives.register("otf.optimizechains",function(v)
+  if v then
+    report_chain()
+    report_chain("using experimental optimized code")
+    report_chain()
+  end
+  local handle=v and optimized_handle_contextchain or handle_contextchain
+  handlers.gsub_context=handle
+  handlers.gsub_contextchain=handle
+  handlers.gsub_reversecontextchain=handle
+  handlers.gpos_contextchain=handle
+  handlers.gpos_context=handle
+end)
+handlers.gsub_context=handle_contextchain
+handlers.gsub_contextchain=handle_contextchain
+handlers.gsub_reversecontextchain=handle_contextchain
+handlers.gpos_contextchain=handle_contextchain
+handlers.gpos_context=handle_contextchain
+local function chained_contextchain(head,start,stop,dataset,sequence,currentlookup,rlmode)
+  local steps=currentlookup.steps
+  local nofsteps=currentlookup.nofsteps
+  if nofsteps>1 then
+    reportmoresteps(dataset,sequence)
+  end
+  return handle_contextchain(head,start,dataset,sequence,currentlookup,rlmode)
+end
+chainprocs.gsub_context=chained_contextchain
+chainprocs.gsub_contextchain=chained_contextchain
+chainprocs.gsub_reversecontextchain=chained_contextchain
+chainprocs.gpos_contextchain=chained_contextchain
+chainprocs.gpos_context=chained_contextchain
+local missing=setmetatableindex("table")
+local logwarning=report_process
+local resolved={} 
+local function logprocess(...)
+  if trace_steps then
+    registermessage(...)
+  end
+  report_process(...)
+end
+local sequencelists=setmetatableindex(function(t,font)
+  local sequences=fontdata[font].resources.sequences
+  if not sequences or not next(sequences) then
+    sequences=false
+  end
+  t[font]=sequences
+  return sequences
+end)
+do 
+  local autofeatures=fonts.analyzers.features
+  local featuretypes=otf.tables.featuretypes
+  local defaultscript=otf.features.checkeddefaultscript
+  local defaultlanguage=otf.features.checkeddefaultlanguage
+  local wildcard="*"
+  local default="dflt"
+  local function initialize(sequence,script,language,enabled,autoscript,autolanguage)
+    local features=sequence.features
+    if features then
+      local order=sequence.order
+      if order then
+        local featuretype=featuretypes[sequence.type or "unknown"]
+        for i=1,#order do
+          local kind=order[i]
+          local valid=enabled[kind]
+          if valid then
+            local scripts=features[kind]
+            local languages=scripts and (
+              scripts[script] or
+              scripts[wildcard] or
+              (autoscript and defaultscript(featuretype,autoscript,scripts))
+            )
+            local enabled=languages and (
+              languages[language] or
+              languages[wildcard] or
+              (autolanguage and defaultlanguage(featuretype,autolanguage,languages))
+            )
+            if enabled then
+              return { valid,autofeatures[kind] or false,sequence,kind }
+            end
+          end
+        end
+      else
+      end
+    end
+    return false
+  end
+  function otf.dataset(tfmdata,font) 
+    local shared=tfmdata.shared
+    local properties=tfmdata.properties
+    local language=properties.language or "dflt"
+    local script=properties.script  or "dflt"
+    local enabled=shared.features
+    local autoscript=enabled and enabled.autoscript
+    local autolanguage=enabled and enabled.autolanguage
+    local res=resolved[font]
+    if not res then
+      res={}
+      resolved[font]=res
+    end
+    local rs=res[script]
+    if not rs then
+      rs={}
+      res[script]=rs
+    end
+    local rl=rs[language]
+    if not rl then
+      rl={
+      }
+      rs[language]=rl
+      local sequences=tfmdata.resources.sequences
+      if sequences then
+        for s=1,#sequences do
+          local v=enabled and initialize(sequences[s],script,language,enabled,autoscript,autolanguage)
+          if v then
+            rl[#rl+1]=v
+          end
+        end
+      end
+    end
+    return rl
+  end
+end
+local function report_disc(what,n)
+  report_run("%s: %s > %s",what,n,languages.serializediscretionary(n))
+end
+local function kernrun(disc,k_run,font,attr,...)
+  if trace_kernruns then
+    report_disc("kern",disc)
+  end
+  local prev,next=getboth(disc)
+  local nextstart=next
+  local done=false
+  local pre,post,replace,pretail,posttail,replacetail=getdisc(disc,true)
+  local prevmarks=prev
+  while prevmarks do
+    local char=ischar(prevmarks,font)
+    if char and marks[char] then
+      prevmarks=getprev(prevmarks)
+    else
+      break
+    end
+  end
+  if prev and not ischar(prev,font) then 
+    prev=false
+  end
+  if next and not ischar(next,font) then 
+    next=false
+  end
+  if pre then
+    if k_run(pre,"injections",nil,font,attr,...) then
+      done=true
+    end
+    if prev then
+      setlink(prev,pre)
+      if k_run(prevmarks,"preinjections",pre,font,attr,...) then 
+        done=true
+      end
+      setprev(pre)
+      setlink(prev,disc)
+    end
+  end
+  if post then
+    if k_run(post,"injections",nil,font,attr,...) then
+      done=true
+    end
+    if next then
+      setlink(posttail,next)
+      if k_run(posttail,"postinjections",next,font,attr,...) then
+        done=true
+      end
+      setnext(posttail)
+      setlink(disc,next)
+    end
+  end
+  if replace then
+    if k_run(replace,"injections",nil,font,attr,...) then
+      done=true
+    end
+    if prev then
+      setlink(prev,replace)
+      if k_run(prevmarks,"replaceinjections",replace,font,attr,...) then 
+        done=true
+      end
+      setprev(replace)
+      setlink(prev,disc)
+    end
+    if next then
+      setlink(replacetail,next)
+      if k_run(replacetail,"replaceinjections",next,font,attr,...) then
+        done=true
+      end
+      setnext(replacetail)
+      setlink(disc,next)
+    end
+  elseif prev and next then
+    setlink(prev,next)
+    if k_run(prevmarks,"emptyinjections",next,font,attr,...) then
+      done=true
+    end
+    setlink(prev,disc,next)
+  end
+  return nextstart,done
+end
+local function comprun(disc,c_run,...) 
+  if trace_compruns then
+    report_disc("comp",disc)
+  end
+  local pre,post,replace=getdisc(disc)
+  local renewed=false
+  if pre then
+    sweepnode=disc
+    sweeptype="pre" 
+    local new,done=c_run(pre,...)
+    if done then
+      pre=new
+      renewed=true
+    end
+  end
+  if post then
+    sweepnode=disc
+    sweeptype="post"
+    local new,done=c_run(post,...)
+    if done then
+      post=new
+      renewed=true
+    end
+  end
+  if replace then
+    sweepnode=disc
+    sweeptype="replace"
+    local new,done=c_run(replace,...)
+    if done then
+      replace=new
+      renewed=true
+    end
+  end
+  sweepnode=nil
+  sweeptype=nil
+  if renewed then
+    setdisc(disc,pre,post,replace)
+  end
+  return getnext(disc),renewed
+end
+local function testrun(disc,t_run,c_run,...)
+  if trace_testruns then
+    report_disc("test",disc)
+  end
+  local prev,next=getboth(disc)
+  if not next then
+    return
+  end
+  local pre,post,replace,pretail,posttail,replacetail=getdisc(disc,true)
+  local done=false
+  if (post or replace) and prev then
+    if post then
+      setlink(posttail,next)
+    else
+      post=next
+    end
+    if replace then
+      setlink(replacetail,next)
+    else
+      replace=next
+    end
+    local d_post=t_run(post,next,...)
+    local d_replace=t_run(replace,next,...)
+    if d_post>0 or d_replace>0 then
+      local d=d_replace>d_post and d_replace or d_post
+      local head=getnext(disc)
+      local tail=head
+      for i=1,d do
+        tail=getnext(tail)
+        if getid(tail)==disc_code then
+          head,tail=flattendisk(head,tail)
+        end
+      end
+      local next=getnext(tail)
+      setnext(tail)
+      setprev(head)
+      local new=copy_node_list(head)
+      if posttail then
+        setlink(posttail,head)
+      else
+        post=head
+      end
+      if replacetail then
+        setlink(replacetail,new)
+      else
+        replace=new
+      end
+      setlink(disc,next)
+    else
+      if posttail then
+        setnext(posttail)
+      else
+        post=nil
+      end
+      setnext(replacetail)
+      if replacetail then
+        setnext(replacetail)
+      else
+        replace=nil
+      end
+      setprev(next,disc)
+    end
+  end
+  local renewed=false
+  if pre then
+    sweepnode=disc
+    sweeptype="pre"
+    local new,ok=c_run(pre,...)
+    if ok then
+      pre=new
+      renewed=true
+    end
+  end
+  if post then
+    sweepnode=disc
+    sweeptype="post"
+    local new,ok=c_run(post,...)
+    if ok then
+      post=new
+      renewed=true
+    end
+  end
+  if replace then
+    sweepnode=disc
+    sweeptype="replace"
+    local new,ok=c_run(replace,...)
+    if ok then
+      replace=new
+      renewed=true
+    end
+  end
+  sweepnode=nil
+  sweeptype=nil
+  if renewed then
+    setdisc(disc,pre,post,replace)
+    return next,true
+  else
+    return next,done
+  end
+end
+local nesting=0
+local function c_run_single(head,font,attr,lookupcache,step,dataset,sequence,rlmode,handler)
+  local done=false
+  local sweep=sweephead[head]
+  if sweep then
+    start=sweep
+    sweephead[head]=false
+  else
+    start=head
+  end
+  while start do
+    local char=ischar(start,font)
+    if char then
+      local a 
+      if attr then
+        a=getattr(start,0)
+      end
+      if not a or (a==attr) then
+        local lookupmatch=lookupcache[char]
+        if lookupmatch then
+          local ok
+          head,start,ok=handler(head,start,dataset,sequence,lookupmatch,rlmode,step,1)
+          if ok then
+            done=true
+          end
+        end
+        if start then
+          start=getnext(start)
+        end
+      else
+        start=getnext(start)
+      end
+    elseif char==false then
+      return head,done
+    elseif sweep then
+      return head,done
+    else
+      start=getnext(start)
+    end
+  end
+  return head,done
+end
+local function t_run_single(start,stop,font,attr,lookupcache)
+  local lastd=nil
+  while start~=stop do
+    local char=ischar(start,font)
+    if char then
+      local a 
+      if attr then
+        a=getattr(start,0)
+      end
+      local startnext=getnext(start)
+      if not a or (a==attr) then
+        local lookupmatch=lookupcache[char]
+        if lookupmatch then
+          local s=startnext
+          local ss=nil
+          local sstop=s==stop
+          if not s then
+            s=ss
+            ss=nil
+          end
+          while getid(s)==disc_code do
+            ss=getnext(s)
+            s=getfield(s,"replace")
+            if not s then
+              s=ss
+              ss=nil
+            end
+          end
+          local l=nil
+          local d=0
+          while s do
+            local lg=lookupmatch[getchar(s)]
+            if lg then
+              if sstop then
+                d=1
+              elseif d>0 then
+                d=d+1
+              end
+              l=lg
+              s=getnext(s)
+              sstop=s==stop
+              if not s then
+                s=ss
+                ss=nil
+              end
+              while getid(s)==disc_code do
+                ss=getnext(s)
+                s=getfield(s,"replace")
+                if not s then
+                  s=ss
+                  ss=nil
+                end
+              end
+            else
+              break
+            end
+          end
+          if l and l.ligature then
+            lastd=d
+          end
+        end
+      else
+      end
+      if lastd then
+        return lastd
+      end
+      start=startnext
+    else
+      break
+    end
+  end
+  return 0
+end
+local function k_run_single(sub,injection,last,font,attr,lookupcache,step,dataset,sequence,rlmode,handler)
+  local a 
+  if attr then
+    a=getattr(sub,0)
+  end
+  if not a or (a==attr) then
+    for n in traverse_nodes(sub) do 
+      if n==last then
+        break
+      end
+      local char=ischar(n)
+      if char then
+        local lookupmatch=lookupcache[char]
+        if lookupmatch then
+          local h,d,ok=handler(sub,n,dataset,sequence,lookupmatch,rlmode,step,1,injection)
+          if ok then
+            return true
+          end
+        end
+      end
+    end
+  end
+end
+local function c_run_multiple(head,font,attr,steps,nofsteps,dataset,sequence,rlmode,handler)
+  local done=false
+  local sweep=sweephead[head]
+  if sweep then
+    start=sweep
+    sweephead[head]=false
+  else
+    start=head
+  end
+  while start do
+    local char=ischar(start,font)
+    if char then
+      local a 
+      if attr then
+        a=getattr(start,0)
+      end
+      if not a or (a==attr) then
+        for i=1,nofsteps do
+          local step=steps[i]
+          local lookupcache=step.coverage
+          local lookupmatch=lookupcache[char]
+          if lookupmatch then
+            local ok
+            head,start,ok=handler(head,start,dataset,sequence,lookupmatch,rlmode,step,i)
+            if ok then
+              done=true
+              break
+            elseif not start then
+              break
+            end
+          end
+        end
+        if start then
+          start=getnext(start)
+        end
+      else
+        start=getnext(start)
+      end
+    elseif char==false then
+      return head,done
+    elseif sweep then
+      return head,done
+    else
+      start=getnext(start)
+    end
+  end
+  return head,done
+end
+local function t_run_multiple(start,stop,font,attr,steps,nofsteps)
+  local lastd=nil
+  while start~=stop do
+    local char=ischar(start,font)
+    if char then
+      local a 
+      if attr then
+        a=getattr(start,0)
+      end
+      local startnext=getnext(start)
+      if not a or (a==attr) then
+        for i=1,nofsteps do
+          local step=steps[i]
+          local lookupcache=step.coverage
+          local lookupmatch=lookupcache[char]
+          if lookupmatch then
+            local s=startnext
+            local ss=nil
+            local sstop=s==stop
+            if not s then
+              s=ss
+              ss=nil
+            end
+            while getid(s)==disc_code do
+              ss=getnext(s)
+              s=getfield(s,"replace")
+              if not s then
+                s=ss
+                ss=nil
+              end
+            end
+            local l=nil
+            local d=0
+            while s do
+              local lg=lookupmatch[getchar(s)]
+              if lg then
+                if sstop then
+                  d=1
+                elseif d>0 then
+                  d=d+1
+                end
+                l=lg
+                s=getnext(s)
+                sstop=s==stop
+                if not s then
+                  s=ss
+                  ss=nil
+                end
+                while getid(s)==disc_code do
+                  ss=getnext(s)
+                  s=getfield(s,"replace")
+                  if not s then
+                    s=ss
+                    ss=nil
+                  end
+                end
+              else
+                break
+              end
+            end
+            if l and l.ligature then
+              lastd=d
+            end
+          end
+        end
+      else
+      end
+      if lastd then
+        return lastd
+      end
+      start=startnext
+    else
+      break
+    end
+  end
+  return 0
+end
+local function k_run_multiple(sub,injection,last,font,attr,steps,nofsteps,dataset,sequence,rlmode,handler)
+  local a 
+  if attr then
+    a=getattr(sub,0)
+  end
+  if not a or (a==attr) then
+    for n in traverse_nodes(sub) do 
+      if n==last then
+        break
+      end
+      local char=ischar(n)
+      if char then
+        for i=1,nofsteps do
+          local step=steps[i]
+          local lookupcache=step.coverage
+          local lookupmatch=lookupcache[char]
+          if lookupmatch then
+            local h,d,ok=handler(head,n,dataset,sequence,lookupmatch,rlmode,step,i,injection)
+            if ok then
+              return true
+            end
+          end
+        end
+      end
+    end
+  end
+end
+local function txtdirstate(start,stack,top,rlparmode)
+  local dir=getdir(start)
+  local new=1
+  if dir=="+TRT" then
+    top=top+1
+    stack[top]=dir
+    new=-1
+  elseif dir=="+TLT" then
+    top=top+1
+    stack[top]=dir
+  elseif dir=="-TRT" or dir=="-TLT" then
+    top=top-1
+    if stack[top]=="+TRT" then
+      new=-1
+    end
+  else
+    new=rlparmode
+  end
+  if trace_directions then
+    report_process("directions after txtdir %a: parmode %a, txtmode %a, level %a",dir,mref(rlparmode),mref(new),top)
+  end
+  return getnext(start),top,new
+end
+local function pardirstate(start)
+  local dir=getdir(start)
+  local new=0
+  if dir=="TLT" then
+    new=1
+  elseif dir=="TRT" then
+    new=-1
+  end
+  if trace_directions then
+    report_process("directions after pardir %a: parmode %a",dir,mref(new))
+  end
+  return getnext(start),new,new
+end
+otf.helpers=otf.helpers or {}
+otf.helpers.txtdirstate=txtdirstate
+otf.helpers.pardirstate=pardirstate
+do
+  local fastdisc=true
+  directives.register("otf.fastdisc",function(v) fastdisc=v end)
+  local otfdataset=nil 
+  local getfastdisc={ __index=function(t,k)
+    local v=usesfont(k,currentfont)
+    t[k]=v
+    return v
+  end }
+  local getfastspace={ __index=function(t,k)
+    local v=isspace(k,threshold) or false
+    t[k]=v
+    return v
+  end }
+  function otf.featuresprocessor(head,font,attr,direction,n)
+    local sequences=sequencelists[font] 
+    nesting=nesting+1
+    if nesting==1 then
+      currentfont=font
+      tfmdata=fontdata[font]
+      descriptions=tfmdata.descriptions 
+      characters=tfmdata.characters  
+   local resources=tfmdata.resources
+      marks=resources.marks
+      classes=resources.classes
+      threshold,
+      factor=getthreshold(font)
+      checkmarks=tfmdata.properties.checkmarks
+      if not otfdataset then
+        otfdataset=otf.dataset
+      end
+      discs=fastdisc and n and n>1 and setmetatable({},getfastdisc) 
+      spaces=setmetatable({},getfastspace)
+    elseif currentfont~=font then
+      report_warning("nested call with a different font, level %s, quitting",nesting)
+      nesting=nesting-1
+      return head,false
+    end
+    local head=tonut(head)
+    if trace_steps then
+      checkstep(head)
+    end
+    local initialrl=direction=="TRT" and -1 or 0
+    local done=false
+    local datasets=otfdataset(tfmdata,font,attr)
+    local dirstack={} 
+    sweephead={}
+    for s=1,#datasets do
+      local dataset=datasets[s]
+      local attribute=dataset[2]
+      local sequence=dataset[3] 
+      local rlparmode=initialrl
+      local topstack=0
+      local typ=sequence.type
+      local gpossing=typ=="gpos_single" or typ=="gpos_pair" 
+      local handler=handlers[typ] 
+      local steps=sequence.steps
+      local nofsteps=sequence.nofsteps
+      if not steps then
+        local h,d,ok=handler(head,head,dataset,sequence,nil,nil,nil,0,font,attr)
+        if ok then
+          done=true
+          if h then
+            head=h
+          end
+        end
+      elseif typ=="gsub_reversecontextchain" then
+        local start=find_node_tail(head)
+        local rlmode=0 
+        local merged=steps.merged
+        while start do
+          local char=ischar(start,font)
+          if char then
+            local m=merged[char]
+            if m then
+              local a 
+              if attr then
+                a=getattr(start,0)
+              end
+              if not a or (a==attr) then
+                for i=m[1],m[2] do
+                  local step=steps[i]
+                  local lookupcache=step.coverage
+                  local lookupmatch=lookupcache[char]
+                  if lookupmatch then
+                    local ok
+                    head,start,ok=handler(head,start,dataset,sequence,lookupmatch,rlmode,step,i)
+                    if ok then
+                      done=true
+                      break
+                    end
+                  end
+                end
+                if start then
+                  start=getprev(start)
+                end
+              else
+                start=getprev(start)
+              end
+            else
+              start=getprev(start)
+            end
+          else
+            start=getprev(start)
+          end
+        end
+      else
+        local start=head
+        local rlmode=initialrl
+        if nofsteps==1 then 
+          local step=steps[1]
+          local lookupcache=step.coverage
+          while start do
+            local char,id=ischar(start,font)
+            if char then
+              local lookupmatch=lookupcache[char]
+              if lookupmatch then
+                local a 
+                if attr then
+                  if getattr(start,0)==attr and (not attribute or getprop(start,a_state)==attribute) then
+                    a=true
+                  end
+                elseif not attribute or getprop(start,a_state)==attribute then
+                  a=true
+                end
+                if a then
+                  local ok
+                  head,start,ok=handler(head,start,dataset,sequence,lookupmatch,rlmode,step,1)
+                  if ok then
+                    done=true
+                  end
+                  if start then
+                    start=getnext(start)
+                  end
+                else
+                  start=getnext(start)
+                end
+              else
+                start=getnext(start)
+              end
+            elseif char==false then
+              start=getnext(start)
+            elseif id==glue_code then
+              start=getnext(start)
+            elseif id==disc_code then
+              if not discs or discs[start]==true then
+                local ok
+                if gpossing then
+                  start,ok=kernrun(start,k_run_single,font,attr,lookupcache,step,dataset,sequence,rlmode,handler)
+                elseif typ=="gsub_ligature" then
+                  start,ok=testrun(start,t_run_single,c_run_single,font,attr,lookupcache,step,dataset,sequence,rlmode,handler)
+                else
+                  start,ok=comprun(start,c_run_single,font,attr,lookupcache,step,dataset,sequence,rlmode,handler)
+                end
+                if ok then
+                  done=true
+                end
+              else
+                start=getnext(start)
+              end
+            elseif id==math_code then
+              start=getnext(end_of_math(start))
+            elseif id==dir_code then
+              start,topstack,rlmode=txtdirstate(start,dirstack,topstack,rlparmode)
+            elseif id==localpar_code then
+              start,rlparmode,rlmode=pardirstate(start)
+            else
+              start=getnext(start)
+            end
+          end
+        else
+          local merged=steps.merged
+          while start do
+            local char,id=ischar(start,font)
+            if char then
+              local m=merged[char]
+              if m then
+                local a 
+                if attr then
+                  if getattr(start,0)==attr and (not attribute or getprop(start,a_state)==attribute) then
+                    a=true
+                  end
+                elseif not attribute or getprop(start,a_state)==attribute then
+                  a=true
+                end
+                if a then
+                  for i=m[1],m[2] do
+                    local step=steps[i]
+                    local lookupcache=step.coverage
+                    local lookupmatch=lookupcache[char]
+                    if lookupmatch then
+                      local ok
+                      head,start,ok=handler(head,start,dataset,sequence,lookupmatch,rlmode,step,i)
+                      if ok then
+                        done=true
+                        break
+                      elseif not start then
+                        break
+                      end
+                    end
+                  end
+                  if start then
+                    start=getnext(start)
+                  end
+                else
+                  start=getnext(start)
+                end
+              else
+                start=getnext(start)
+              end
+            elseif char==false then
+              start=getnext(start)
+            elseif id==glue_code then
+              start=getnext(start)
+            elseif id==disc_code then
+              if not discs or discs[start]==true then
+                local ok
+                if gpossing then
+                  start,ok=kernrun(start,k_run_multiple,font,attr,steps,nofsteps,dataset,sequence,rlmode,handler)
+                elseif typ=="gsub_ligature" then
+                  start,ok=testrun(start,t_run_multiple,c_run_multiple,font,attr,steps,nofsteps,dataset,sequence,rlmode,handler)
+                else
+                  start,ok=comprun(start,c_run_multiple,font,attr,steps,nofsteps,dataset,sequence,rlmode,handler)
+                end
+                if ok then
+                  done=true
+                end
+              else
+                start=getnext(start)
+              end
+            elseif id==math_code then
+              start=getnext(end_of_math(start))
+            elseif id==dir_code then
+              start,topstack,rlmode=txtdirstate(start,dirstack,topstack,rlparmode)
+            elseif id==localpar_code then
+              start,rlparmode,rlmode=pardirstate(start)
+            else
+              start=getnext(start)
+            end
+          end
+        end
+      end
+      if trace_steps then 
+        registerstep(head)
+      end
+    end
+    nesting=nesting-1
+    head=tonode(head)
+    return head,done
+  end
+  function otf.datasetpositionprocessor(head,font,direction,dataset)
+    currentfont=font
+    tfmdata=fontdata[font]
+    descriptions=tfmdata.descriptions 
+    characters=tfmdata.characters  
+ local resources=tfmdata.resources
+    marks=resources.marks
+    classes=resources.classes
+    threshold,
+    factor=getthreshold(font)
+    checkmarks=tfmdata.properties.checkmarks
+    if type(dataset)=="number" then
+      dataset=otfdataset(tfmdata,font,0)[dataset]
+    end
+    local sequence=dataset[3] 
+    local typ=sequence.type
+    local handler=handlers[typ] 
+    local steps=sequence.steps
+    local nofsteps=sequence.nofsteps
+    local head=tonut(head)
+    local done=false
+    local dirstack={} 
+    local start=head
+    local initialrl=direction=="TRT" and -1 or 0
+    local rlmode=initialrl
+    local rlparmode=initialrl
+    local topstack=0
+    local merged=steps.merged
+    local position=0
+    while start do
+      local char,id=ischar(start,font)
+      if char then
+        position=position+1
+        local m=merged[char]
+        if m then
+          for i=m[1],m[2] do
+            local step=steps[i]
+            local lookupcache=step.coverage
+            local lookupmatch=lookupcache[char]
+            if lookupmatch then
+              local ok
+              head,start,ok=handler(head,start,dataset,sequence,lookupmatch,rlmode,step,i)
+              if ok then
+                break
+              elseif not start then
+                break
+              end
+            end
+          end
+          if start then
+            start=getnext(start)
+          end
+        else
+          start=getnext(start)
+        end
+      elseif char==false then
+        start=getnext(start)
+      elseif id==glue_code then
+        start=getnext(start)
+      elseif id==math_code then
+        start=getnext(end_of_math(start))
+      elseif id==dir_code then
+        start,topstack,rlmode=txtdirstate(start,dirstack,topstack,rlparmode)
+      elseif id==localpar_code then
+        start,rlparmode,rlmode=pardirstate(start)
+      else
+        start=getnext(start)
+      end
+    end
+    return tonode(head) 
+  end
+end
+local plugins={}
+otf.plugins=plugins
+function otf.registerplugin(name,f)
+  if type(name)=="string" and type(f)=="function" then
+    plugins[name]={ name,f }
+  end
+end
+function otf.plugininitializer(tfmdata,value)
+  if type(value)=="string" then
+    tfmdata.shared.plugin=plugins[value]
+  end
+end
+function otf.pluginprocessor(head,font,attr,direction) 
+  local s=fontdata[font].shared
+  local p=s and s.plugin
+  if p then
+    if trace_plugins then
+      report_process("applying plugin %a",p[1])
+    end
+    return p[2](head,font,attr,direction)
+  else
+    return head,false
+  end
+end
+function otf.featuresinitializer(tfmdata,value)
+end
+registerotffeature {
+  name="features",
+  description="features",
+  default=true,
+  initializers={
+    position=1,
+    node=otf.featuresinitializer,
+    plug=otf.plugininitializer,
+  },
+  processors={
+    node=otf.featuresprocessor,
+    plug=otf.pluginprocessor,
+  }
+}
+otf.handlers=handlers
+local setspacekerns=nodes.injections.setspacekerns if not setspacekerns then os.exit() end
+if fontfeatures then
+  function otf.handlers.trigger_space_kerns(head,start,dataset,sequence,_,_,_,_,font,attr)
+    local features=fontfeatures[font]
+    local enabled=features and features.spacekern and features.kern
+    if enabled then
+      setspacekerns(font,sequence)
+    end
+    return head,start,enabled
+  end
+else 
+  function otf.handlers.trigger_space_kerns(head,start,dataset,sequence,_,_,_,_,font,attr)
+    local shared=fontdata[font].shared
+    local features=shared and shared.features
+    local enabled=features and features.spacekern and features.kern
+    if enabled then
+      setspacekerns(font,sequence)
+    end
+    return head,start,enabled
+  end
+end
+local function hasspacekerns(data)
+  local sequences=data.resources.sequences
+  for i=1,#sequences do
+    local sequence=sequences[i]
+    local steps=sequence.steps
+    if steps and sequence.features.kern then
+      for i=1,#steps do
+        local coverage=steps[i].coverage
+        if not coverage then
+        elseif coverage[32] then
+          return true
+        else
+          for k,v in next,coverage do
+            if v[32] then
+              return true
+            end
+          end
+        end
+      end
+    end
+  end
+  return false
+end
+otf.readers.registerextender {
+  name="spacekerns",
+  action=function(data)
+    data.properties.hasspacekerns=hasspacekerns(data)
+  end
+}
+local function spaceinitializer(tfmdata,value) 
+  local resources=tfmdata.resources
+  local spacekerns=resources and resources.spacekerns
+  local properties=tfmdata.properties
+  if value and spacekerns==nil then
+    if properties and properties.hasspacekerns then
+      local sequences=resources.sequences
+      local left={}
+      local right={}
+      local last=0
+      local feat=nil
+      for i=1,#sequences do
+        local sequence=sequences[i]
+        local steps=sequence.steps
+        if steps then
+          local kern=sequence.features.kern
+          if kern then
+            if feat then
+              for script,languages in next,kern do
+                local f=feat[script]
+                if f then
+                  for l in next,languages do
+                    f[l]=true
+                  end
+                else
+                  feat[script]=languages
+                end
+              end
+            else
+              feat=kern
+            end
+            for i=1,#steps do
+              local step=steps[i]
+              local coverage=step.coverage
+              local rules=step.rules
+              local format=step.format
+              if rules then
+              elseif coverage then
+                local single=format=="gpos_single"
+                local kerns=coverage[32]
+                if kerns then
+                  for k,v in next,kerns do
+                    if type(v)~="table" then
+                      right[k]=v
+                    elseif single then
+                      right[k]=v[3]
+                    else
+                      local one=v[1]
+                      if one and one~=true then
+                        right[k]=one[3]
+                      end
+                    end
+                  end
+                end
+                for k,v in next,coverage do
+                  local kern=v[32]
+                  if kern then
+                    if type(kern)~="table" then
+                      left[k]=kern
+                    elseif single then
+                      left[k]=kern[3]
+                    else
+                      local one=kern[1]
+                      if one and one~=true then
+                        left[k]=one[3]
+                      end
+                    end
+                  end
+                end
+              else
+              end
+            end
+            last=i
+          end
+        else
+        end
+      end
+      left=next(left) and left or false
+      right=next(right) and right or false
+      if left or right then
+        spacekerns={
+          left=left,
+          right=right,
+        }
+        if last>0 then
+          local triggersequence={
+            features={ kern=feat or { dflt={ dflt=true,} } },
+            flags=noflags,
+            name="trigger_space_kerns",
+            order={ "kern" },
+            type="trigger_space_kerns",
+            left=left,
+            right=right,
+          }
+          insert(sequences,last,triggersequence)
+        end
+      else
+        spacekerns=false
+      end
+    else
+      spacekerns=false
+    end
+    resources.spacekerns=spacekerns
+  end
+  return spacekerns
+end
+registerotffeature {
+  name="spacekern",
+  description="space kern injection",
+  default=true,
+  initializers={
+    node=spaceinitializer,
+  },
+}
+local function markinitializer(tfmdata,value)
+  local properties=tfmdata.properties
+  properties.checkmarks=value
+end
+registerotffeature {
+  name="checkmarks",
+  description="check mark widths",
+  default=true,
+  initializers={
+    node=markinitializer,
+  },
+}
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-osd']={ 
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Kai Eigner, TAT Zetwerk / Hans Hagen, PRAGMA ADE",
+  copyright="TAT Zetwerk / PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local insert,imerge,copy=table.insert,table.imerge,table.copy
+local next,type=next,type
+local report_devanagari=logs.reporter("otf","devanagari")
+fonts=fonts          or {}
+fonts.analyzers=fonts.analyzers     or {}
+fonts.analyzers.methods=fonts.analyzers.methods or { node={ otf={} } }
+local otf=fonts.handlers.otf
+local handlers=otf.handlers
+local methods=fonts.analyzers.methods
+local otffeatures=fonts.constructors.features.otf
+local registerotffeature=otffeatures.register
+local nuts=nodes.nuts
+local tonode=nuts.tonode
+local tonut=nuts.tonut
+local getnext=nuts.getnext
+local getprev=nuts.getprev
+local getboth=nuts.getboth
+local getid=nuts.getid
+local getchar=nuts.getchar
+local getfont=nuts.getfont
+local getsubtype=nuts.getsubtype
+local setlink=nuts.setlink
+local setnext=nuts.setnext
+local setprev=nuts.setprev
+local setchar=nuts.setchar
+local getprop=nuts.getprop
+local setprop=nuts.setprop
+local ischar=nuts.is_char
+local insert_node_after=nuts.insert_after
+local copy_node=nuts.copy
+local remove_node=nuts.remove
+local flush_list=nuts.flush_list
+local flush_node=nuts.flush_node
+local copyinjection=nodes.injections.copy 
+local unsetvalue=attributes.unsetvalue
+local fontdata=fonts.hashes.identifiers
+local a_state=attributes.private('state')
+local a_syllabe=attributes.private('syllabe')
+local dotted_circle=0x25CC
+local states=fonts.analyzers.states 
+local s_rphf=states.rphf
+local s_half=states.half
+local s_pref=states.pref
+local s_blwf=states.blwf
+local s_pstf=states.pstf
+local replace_all_nbsp=nil
+replace_all_nbsp=function(head) 
+  replace_all_nbsp=typesetters and typesetters.characters and typesetters.characters.replacenbspaces or function(head)
+    return head
+  end
+  return replace_all_nbsp(head)
+end
+local xprocesscharacters=nil
+if context then
+  xprocesscharacters=function(head,font)
+    xprocesscharacters=nodes.handlers.characters
+    return xprocesscharacters(head,font)
+  end
+else
+  xprocesscharacters=function(head,font)
+    xprocesscharacters=nodes.handlers.nodepass 
+    return xprocesscharacters(head,font)
+  end
+end
+local function processcharacters(head,font)
+  return tonut(xprocesscharacters(tonode(head))) 
+end
+local consonant={
+  [0x0915]=true,[0x0916]=true,[0x0917]=true,[0x0918]=true,
+  [0x0919]=true,[0x091A]=true,[0x091B]=true,[0x091C]=true,
+  [0x091D]=true,[0x091E]=true,[0x091F]=true,[0x0920]=true,
+  [0x0921]=true,[0x0922]=true,[0x0923]=true,[0x0924]=true,
+  [0x0925]=true,[0x0926]=true,[0x0927]=true,[0x0928]=true,
+  [0x0929]=true,[0x092A]=true,[0x092B]=true,[0x092C]=true,
+  [0x092D]=true,[0x092E]=true,[0x092F]=true,[0x0930]=true,
+  [0x0931]=true,[0x0932]=true,[0x0933]=true,[0x0934]=true,
+  [0x0935]=true,[0x0936]=true,[0x0937]=true,[0x0938]=true,
+  [0x0939]=true,[0x0958]=true,[0x0959]=true,[0x095A]=true,
+  [0x095B]=true,[0x095C]=true,[0x095D]=true,[0x095E]=true,
+  [0x095F]=true,[0x0979]=true,[0x097A]=true,
+  [0x0C95]=true,[0x0C96]=true,[0x0C97]=true,[0x0C98]=true,
+  [0x0C99]=true,[0x0C9A]=true,[0x0C9B]=true,[0x0C9C]=true,
+  [0x0C9D]=true,[0x0C9E]=true,[0x0C9F]=true,[0x0CA0]=true,
+  [0x0CA1]=true,[0x0CA2]=true,[0x0CA3]=true,[0x0CA4]=true,
+  [0x0CA5]=true,[0x0CA6]=true,[0x0CA7]=true,[0x0CA8]=true,
+  [0x0CA9]=true,[0x0CAA]=true,[0x0CAB]=true,[0x0CAC]=true,
+  [0x0CAD]=true,[0x0CAE]=true,[0x0CAF]=true,[0x0CB0]=true,
+  [0x0CB1]=true,[0x0CB2]=true,[0x0CB3]=true,[0x0CB4]=true,
+  [0x0CB5]=true,[0x0CB6]=true,[0x0CB7]=true,[0x0CB8]=true,
+  [0x0CB9]=true,
+  [0x0CDE]=true,
+  [0x0D15]=true,[0x0D16]=true,[0x0D17]=true,[0x0D18]=true,
+  [0x0D19]=true,[0x0D1A]=true,[0x0D1B]=true,[0x0D1C]=true,
+  [0x0D1D]=true,[0x0D1E]=true,[0x0D1F]=true,[0x0D20]=true,
+  [0x0D21]=true,[0x0D22]=true,[0x0D23]=true,[0x0D24]=true,
+  [0x0D25]=true,[0x0D26]=true,[0x0D27]=true,[0x0D28]=true,
+  [0x0D29]=true,[0x0D2A]=true,[0x0D2B]=true,[0x0D2C]=true,
+  [0x0D2D]=true,[0x0D2E]=true,[0x0D2F]=true,[0x0D30]=true,
+  [0x0D31]=true,[0x0D32]=true,[0x0D33]=true,[0x0D34]=true,
+  [0x0D35]=true,[0x0D36]=true,[0x0D37]=true,[0x0D38]=true,
+  [0x0D39]=true,[0x0D3A]=true,
+}
+local independent_vowel={
+  [0x0904]=true,[0x0905]=true,[0x0906]=true,[0x0907]=true,
+  [0x0908]=true,[0x0909]=true,[0x090A]=true,[0x090B]=true,
+  [0x090C]=true,[0x090D]=true,[0x090E]=true,[0x090F]=true,
+  [0x0910]=true,[0x0911]=true,[0x0912]=true,[0x0913]=true,
+  [0x0914]=true,[0x0960]=true,[0x0961]=true,[0x0972]=true,
+  [0x0973]=true,[0x0974]=true,[0x0975]=true,[0x0976]=true,
+  [0x0977]=true,
+  [0x0C85]=true,[0x0C86]=true,[0x0C87]=true,[0x0C88]=true,
+  [0x0C89]=true,[0x0C8A]=true,[0x0C8B]=true,[0x0C8C]=true,
+  [0x0C8D]=true,[0x0C8E]=true,[0x0C8F]=true,[0x0C90]=true,
+  [0x0C91]=true,[0x0C92]=true,[0x0C93]=true,[0x0C94]=true,
+  [0x0D05]=true,[0x0D06]=true,[0x0D07]=true,[0x0D08]=true,
+  [0x0D09]=true,[0x0D0A]=true,[0x0D0B]=true,[0x0D0C]=true,
+  [0x0D0E]=true,[0x0D0F]=true,[0x0D10]=true,[0x0D12]=true,
+  [0x0D13]=true,[0x0D14]=true,
+}
+local dependent_vowel={
+  [0x093A]=true,[0x093B]=true,[0x093E]=true,[0x093F]=true,
+  [0x0940]=true,[0x0941]=true,[0x0942]=true,[0x0943]=true,
+  [0x0944]=true,[0x0945]=true,[0x0946]=true,[0x0947]=true,
+  [0x0948]=true,[0x0949]=true,[0x094A]=true,[0x094B]=true,
+  [0x094C]=true,[0x094E]=true,[0x094F]=true,[0x0955]=true,
+  [0x0956]=true,[0x0957]=true,[0x0962]=true,[0x0963]=true,
+  [0x0CBE]=true,[0x0CBF]=true,[0x0CC0]=true,[0x0CC1]=true,
+  [0x0CC2]=true,[0x0CC3]=true,[0x0CC4]=true,[0x0CC5]=true,
+  [0x0CC6]=true,[0x0CC7]=true,[0x0CC8]=true,[0x0CC9]=true,
+  [0x0CCA]=true,[0x0CCB]=true,[0x0CCC]=true,
+  [0x0D3E]=true,[0x0D3F]=true,[0x0D40]=true,[0x0D41]=true,
+  [0x0D42]=true,[0x0D43]=true,[0x0D44]=true,[0x0D46]=true,
+  [0x0D47]=true,[0x0D48]=true,[0x0D4A]=true,[0x0D4B]=true,
+  [0x0D4C]=true,[0x0D57]=true,
+}
+local vowel_modifier={
+  [0x0900]=true,[0x0901]=true,[0x0902]=true,[0x0903]=true,
+  [0xA8E0]=true,[0xA8E1]=true,[0xA8E2]=true,[0xA8E3]=true,
+  [0xA8E4]=true,[0xA8E5]=true,[0xA8E6]=true,[0xA8E7]=true,
+  [0xA8E8]=true,[0xA8E9]=true,[0xA8EA]=true,[0xA8EB]=true,
+  [0xA8EC]=true,[0xA8ED]=true,[0xA8EE]=true,[0xA8EF]=true,
+  [0xA8F0]=true,[0xA8F1]=true,
+  [0x0D02]=true,[0x0D03]=true,
+}
+local stress_tone_mark={
+  [0x0951]=true,[0x0952]=true,[0x0953]=true,[0x0954]=true,
+  [0x0CCD]=true,
+  [0x0D4D]=true,
+}
+local nukta={
+  [0x093C]=true,
+  [0x0CBC]=true,
+}
+local halant={
+  [0x094D]=true,
+  [0x0CCD]=true,
+  [0x0D4D]=true,
+}
+local ra={
+  [0x0930]=true,
+  [0x0CB0]=true,
+  [0x0D30]=true,
+}
+local c_anudatta=0x0952 
+local c_nbsp=0x00A0 
+local c_zwnj=0x200C 
+local c_zwj=0x200D 
+local zw_char={ 
+  [0x200C]=true,
+  [0x200D]=true,
+}
+local pre_mark={
+  [0x093F]=true,[0x094E]=true,
+  [0x0D46]=true,[0x0D47]=true,[0x0D48]=true,
+}
+local above_mark={
+  [0x0900]=true,[0x0901]=true,[0x0902]=true,[0x093A]=true,
+  [0x0945]=true,[0x0946]=true,[0x0947]=true,[0x0948]=true,
+  [0x0951]=true,[0x0953]=true,[0x0954]=true,[0x0955]=true,
+  [0xA8E0]=true,[0xA8E1]=true,[0xA8E2]=true,[0xA8E3]=true,
+  [0xA8E4]=true,[0xA8E5]=true,[0xA8E6]=true,[0xA8E7]=true,
+  [0xA8E8]=true,[0xA8E9]=true,[0xA8EA]=true,[0xA8EB]=true,
+  [0xA8EC]=true,[0xA8ED]=true,[0xA8EE]=true,[0xA8EF]=true,
+  [0xA8F0]=true,[0xA8F1]=true,
+  [0x0D4E]=true,
+}
+local below_mark={
+  [0x093C]=true,[0x0941]=true,[0x0942]=true,[0x0943]=true,
+  [0x0944]=true,[0x094D]=true,[0x0952]=true,[0x0956]=true,
+  [0x0957]=true,[0x0962]=true,[0x0963]=true,
+}
+local post_mark={
+  [0x0903]=true,[0x093B]=true,[0x093E]=true,[0x0940]=true,
+  [0x0949]=true,[0x094A]=true,[0x094B]=true,[0x094C]=true,
+  [0x094F]=true,
+}
+local twopart_mark={
+  [0x0D4A]={ 0x0D46,0x0D3E,},	
+  [0x0D4B]={ 0x0D47,0x0D3E,},	
+  [0x0D4C]={ 0x0D46,0x0D57,},	
+}
+local mark_four={} 
+for k,v in next,pre_mark  do mark_four[k]=pre_mark  end
+for k,v in next,above_mark do mark_four[k]=above_mark end
+for k,v in next,below_mark do mark_four[k]=below_mark end
+for k,v in next,post_mark do mark_four[k]=post_mark end
+local mark_above_below_post={}
+for k,v in next,above_mark do mark_above_below_post[k]=above_mark end
+for k,v in next,below_mark do mark_above_below_post[k]=below_mark end
+for k,v in next,post_mark do mark_above_below_post[k]=post_mark end
+local reorder_class={
+  [0x0930]="before postscript",
+  [0x093F]="before half",
+  [0x0940]="after subscript",
+  [0x0941]="after subscript",
+  [0x0942]="after subscript",
+  [0x0943]="after subscript",
+  [0x0944]="after subscript",
+  [0x0945]="after subscript",
+  [0x0946]="after subscript",
+  [0x0947]="after subscript",
+  [0x0948]="after subscript",
+  [0x0949]="after subscript",
+  [0x094A]="after subscript",
+  [0x094B]="after subscript",
+  [0x094C]="after subscript",
+  [0x0962]="after subscript",
+  [0x0963]="after subscript",
+  [0x093E]="after subscript",
+  [0x0CB0]="after postscript",
+  [0x0CBF]="before subscript",
+  [0x0CC6]="before subscript",
+  [0x0CCC]="before subscript",
+  [0x0CBE]="before subscript",
+  [0x0CE2]="before subscript",
+  [0x0CE3]="before subscript",
+  [0x0CC1]="before subscript",
+  [0x0CC2]="before subscript",
+  [0x0CC3]="after subscript",
+  [0x0CC4]="after subscript",
+  [0x0CD5]="after subscript",
+  [0x0CD6]="after subscript",
+}
+local dflt_true={
+  dflt=true
+}
+local dev2_defaults={
+  dev2=dflt_true,
+}
+local deva_defaults={
+  dev2=dflt_true,
+  deva=dflt_true,
+}
+local false_flags={ false,false,false,false }
+local both_joiners_true={
+  [0x200C]=true,
+  [0x200D]=true,
+}
+local sequence_reorder_matras={
+  features={ dv01=dev2_defaults },
+  flags=false_flags,
+  name="dv01_reorder_matras",
+  order={ "dv01" },
+  type="devanagari_reorder_matras",
+  nofsteps=1,
+  steps={
+    {
+      osdstep=true,
+      coverage=pre_mark,
+    }
+  }
+}
+local sequence_reorder_reph={
+  features={ dv02=dev2_defaults },
+  flags=false_flags,
+  name="dv02_reorder_reph",
+  order={ "dv02" },
+  type="devanagari_reorder_reph",
+  nofsteps=1,
+  steps={
+    {
+      osdstep=true,
+      coverage={},
+    }
+  }
+}
+local sequence_reorder_pre_base_reordering_consonants={
+  features={ dv03=dev2_defaults },
+  flags=false_flags,
+  name="dv03_reorder_pre_base_reordering_consonants",
+  order={ "dv03" },
+  type="devanagari_reorder_pre_base_reordering_consonants",
+  nofsteps=1,
+  steps={
+    {
+      osdstep=true,
+      coverage={},
+    }
+  }
+}
+local sequence_remove_joiners={
+  features={ dv04=deva_defaults },
+  flags=false_flags,
+  name="dv04_remove_joiners",
+  order={ "dv04" },
+  type="devanagari_remove_joiners",
+  nofsteps=1,
+  steps={
+    { osdstep=true,
+      coverage=both_joiners_true,
+    },
+  }
+}
+local basic_shaping_forms={
+  nukt=true,
+  akhn=true,
+  rphf=true,
+  pref=true,
+  rkrf=true,
+  blwf=true,
+  half=true,
+  pstf=true,
+  vatu=true,
+  cjct=true,
+}
+local valid={
+  akhn=true,
+  rphf=true,
+  pref=true,
+  half=true,
+  blwf=true,
+  pstf=true,
+  pres=true,
+  blws=true,
+  psts=true,
+}
+local function initializedevanagi(tfmdata)
+  local script,language=otf.scriptandlanguage(tfmdata,attr) 
+  if script=="deva" or script=="dev2" or script=="mlym" or script=="mlm2" then
+    local resources=tfmdata.resources
+    local devanagari=resources.devanagari
+    if not devanagari then
+      report_devanagari("adding devanagari features to font")
+      local gsubfeatures=resources.features.gsub
+      local sequences=resources.sequences
+      local sharedfeatures=tfmdata.shared.features
+      local lastmatch=0
+      for s=1,#sequences do 
+        local features=sequences[s].features
+        if features then
+          for k,v in next,features do
+            if basic_shaping_forms[k] then
+              lastmatch=s
+            end
+          end
+        end
+      end
+      local insertindex=lastmatch+1
+      gsubfeatures["dv01"]=dev2_defaults 
+      gsubfeatures["dv02"]=dev2_defaults 
+      gsubfeatures["dv03"]=dev2_defaults 
+      gsubfeatures["dv04"]=deva_defaults
+      local reorder_pre_base_reordering_consonants=copy(sequence_reorder_pre_base_reordering_consonants)
+      local reorder_reph=copy(sequence_reorder_reph)
+      local reorder_matras=copy(sequence_reorder_matras)
+      local remove_joiners=copy(sequence_remove_joiners)
+      insert(sequences,insertindex,reorder_pre_base_reordering_consonants)
+      insert(sequences,insertindex,reorder_reph)
+      insert(sequences,insertindex,reorder_matras)
+      insert(sequences,insertindex,remove_joiners)
+      local blwfcache={}
+      local seqsubset={}
+      local rephstep={
+        coverage={} 
+      }
+      local devanagari={
+        reph=false,
+        vattu=false,
+        blwfcache=blwfcache,
+        seqsubset=seqsubset,
+        reorderreph=rephstep,
+      }
+      reorder_reph.steps={ rephstep }
+      local pre_base_reordering_consonants={}
+      reorder_pre_base_reordering_consonants.steps[1].coverage=pre_base_reordering_consonants
+      resources.devanagari=devanagari
+      for s=1,#sequences do
+        local sequence=sequences[s]
+        local steps=sequence.steps
+        local nofsteps=sequence.nofsteps
+        local features=sequence.features
+        local has_rphf=features.rphf
+        local has_blwf=features.blwf
+        if has_rphf and has_rphf.deva then
+          devanagari.reph=true
+        elseif has_blwf and has_blwf.deva then
+          devanagari.vattu=true
+          for i=1,nofsteps do
+            local step=steps[i]
+            local coverage=step.coverage
+            if coverage then
+              for k,v in next,coverage do
+                if not blwfcache[k] then
+                  blwfcache[k]=v
+                end
+              end
+            end
+          end
+        end
+        for kind,spec in next,features do 
+          if spec.dev2 and valid[kind] then
+            for i=1,nofsteps do
+              local step=steps[i]
+              local coverage=step.coverage
+              if coverage then
+                local reph=false
+                if kind=="rphf" then
+                  if true then
+                    for k,v in next,ra do
+                      local r=coverage[k]
+                      if r then
+                        local h=false
+                        for k,v in next,halant do
+                          local h=r[k]
+                          if h then
+                            reph=h.ligature or false
+                            break
+                          end
+                        end
+                        if reph then
+                          break
+                        end
+                      end
+                    end
+                  else
+                  end
+                end
+                seqsubset[#seqsubset+1]={ kind,coverage,reph }
+              end
+            end
+          end
+          if kind=="pref" then
+            local steps=sequence.steps
+            local nofsteps=sequence.nofsteps
+            for i=1,nofsteps do
+              local step=steps[i]
+              local coverage=step.coverage
+              if coverage then
+                for k,v in next,halant do
+                  local h=coverage[k]
+                  if h then
+                    local found=false
+                    for k,v in next,h do
+                      found=v and v.ligature
+                      if found then
+                        pre_base_reordering_consonants[k]=found
+                        break
+                      end
+                    end
+                    if found then
+                      break
+                    end
+                  end
+                end
+              end
+            end
+          end
+        end
+      end
+      if script=="deva" then
+        sharedfeatures["dv04"]=true 
+      elseif script=="dev2" then
+        sharedfeatures["dv01"]=true 
+        sharedfeatures["dv02"]=true 
+        sharedfeatures["dv03"]=true 
+        sharedfeatures["dv04"]=true 
+      elseif script=="mlym" then
+        sharedfeatures["pstf"]=true
+      elseif script=="mlm2" then
+        sharedfeatures["pstf"]=true
+        sharedfeatures["pref"]=true
+        sharedfeatures["dv03"]=true 
+        gsubfeatures ["dv03"]=dev2_defaults 
+        insert(sequences,insertindex,sequence_reorder_pre_base_reordering_consonants)
+      end
+    end
+  end
+end
+registerotffeature {
+  name="devanagari",
+  description="inject additional features",
+  default=true,
+  initializers={
+    node=initializedevanagi,
+  },
+}
+local function deva_initialize(font,attr) 
+  local tfmdata=fontdata[font]
+  local datasets=otf.dataset(tfmdata,font,attr) 
+  local devanagaridata=datasets.devanagari
+  if not devanagaridata then
+    devanagaridata={
+      reph=false,
+      vattu=false,
+      blwfcache={},
+    }
+    datasets.devanagari=devanagaridata
+    local resources=tfmdata.resources
+    local devanagari=resources.devanagari
+    for s=1,#datasets do
+      local dataset=datasets[s]
+      if dataset and dataset[1] then 
+        local kind=dataset[4]
+        if kind=="rphf" then
+          devanagaridata.reph=true
+        elseif kind=="blwf" then
+          devanagaridata.vattu=true
+          devanagaridata.blwfcache=devanagari.blwfcache
+        end
+      end
+    end
+  end
+  return devanagaridata.reph,devanagaridata.vattu,devanagaridata.blwfcache
+end
+local function deva_reorder(head,start,stop,font,attr,nbspaces)
+  local reph,vattu,blwfcache=deva_initialize(font,attr) 
+  local current=start
+  local n=getnext(start)
+  local base=nil
+  local firstcons=nil
+  local lastcons=nil
+  local basefound=false
+  if reph and ra[getchar(start)] and halant[getchar(n)] then
+    if n==stop then
+      return head,stop,nbspaces
+    end
+    if getchar(getnext(n))==c_zwj then
+      current=start
+    else
+      current=getnext(n)
+      setprop(start,a_state,s_rphf)
+    end
+  end
+  if getchar(current)==c_nbsp then
+    if current==stop then
+      stop=getprev(stop)
+      head=remove_node(head,current)
+      flush_node(current)
+      return head,stop,nbspaces
+    else
+      nbspaces=nbspaces+1
+      base=current
+      firstcons=current
+      lastcons=current
+      current=getnext(current)
+      if current~=stop then
+        if nukta[getchar(current)] then
+          current=getnext(current)
+        end
+        if getchar(current)==c_zwj then
+          if current~=stop then
+            local next=getnext(current)
+            if next~=stop and halant[getchar(next)] then
+              current=next
+              next=getnext(current)
+              local tmp=next and getnext(next) or nil 
+              local changestop=next==stop
+              local tempcurrent=copy_node(next)
+							copyinjection(tempcurrent,next)
+              local nextcurrent=copy_node(current)
+							copyinjection(nextcurrent,current) 
+              setlink(tempcurrent,nextcurrent)
+              setprop(tempcurrent,a_state,s_blwf)
+              tempcurrent=processcharacters(tempcurrent,font)
+              setprop(tempcurrent,a_state,unsetvalue)
+              if getchar(next)==getchar(tempcurrent) then
+                flush_list(tempcurrent)
+                local n=copy_node(current)
+								copyinjection(n,current) 
+                setchar(current,dotted_circle)
+                head=insert_node_after(head,current,n)
+              else
+                setchar(current,getchar(tempcurrent)) 
+                local freenode=getnext(current)
+                setlink(current,tmp)
+                flush_node(freenode)
+                flush_list(tempcurrent)
+                if changestop then
+                  stop=current
+                end
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+  while not basefound do
+    local char=getchar(current)
+    if consonant[char] then
+      setprop(current,a_state,s_half)
+      if not firstcons then
+        firstcons=current
+      end
+      lastcons=current
+      if not base then
+        base=current
+      elseif blwfcache[char] then
+        setprop(current,a_state,s_blwf)
+      else
+        base=current
+      end
+    end
+    basefound=current==stop
+    current=getnext(current)
+  end
+  if base~=lastcons then
+    local np=base
+    local n=getnext(base)
+    local ch=getchar(n)
+    if nukta[ch] then
+      np=n
+      n=getnext(n)
+      ch=getchar(n)
+    end
+    if halant[ch] then
+      if lastcons~=stop then
+        local ln=getnext(lastcons)
+        if nukta[getchar(ln)] then
+          lastcons=ln
+        end
+      end
+      local nn=getnext(n)
+      local ln=getnext(lastcons) 
+      setlink(np,nn)
+      setnext(lastcons,n)
+      if ln then
+        setprev(ln,n)
+      end
+      setnext(n,ln)
+      setprev(n,lastcons)
+      if lastcons==stop then
+        stop=n
+      end
+    end
+  end
+  n=getnext(start)
+  if n~=stop and ra[getchar(start)] and halant[getchar(n)] and not zw_char[getchar(getnext(n))] then
+    local matra=base
+    if base~=stop then
+      local next=getnext(base)
+      if dependent_vowel[getchar(next)] then
+        matra=next
+      end
+    end
+    local sp=getprev(start)
+    local nn=getnext(n)
+    local mn=getnext(matra)
+    setlink(sp,nn)
+    setlink(matra,start)
+    setlink(n,mn)
+    if head==start then
+      head=nn
+    end
+    start=nn
+    if matra==stop then
+      stop=n
+    end
+  end
+  local current=start
+  while current~=stop do
+    local next=getnext(current)
+    if next~=stop and halant[getchar(next)] and getchar(getnext(next))==c_zwnj then
+      setprop(current,a_state,unsetvalue)
+    end
+    current=next
+  end
+  if base~=stop and getprop(base,a_state) then
+    local next=getnext(base)
+    if halant[getchar(next)] and not (next~=stop and getchar(getnext(next))==c_zwj) then
+      setprop(base,a_state,unsetvalue)
+    end
+  end
+  local current,allreordered,moved=start,false,{ [base]=true }
+  local a,b,p,bn=base,base,base,getnext(base)
+  if base~=stop and nukta[getchar(bn)] then
+    a,b,p=bn,bn,bn
+  end
+  while not allreordered do
+    local c=current
+    local n=getnext(current)
+    local l=nil 
+    if c~=stop then
+      local ch=getchar(n)
+      if nukta[ch] then
+        c=n
+        n=getnext(n)
+        ch=getchar(n)
+      end
+      if c~=stop then
+        if halant[ch] then
+          c=n
+          n=getnext(n)
+          ch=getchar(n)
+        end
+        while c~=stop and dependent_vowel[ch] do
+          c=n
+          n=getnext(n)
+          ch=getchar(n)
+        end
+        if c~=stop then
+          if vowel_modifier[ch] then
+            c=n
+            n=getnext(n)
+            ch=getchar(n)
+          end
+          if c~=stop and stress_tone_mark[ch] then
+            c=n
+            n=getnext(n)
+          end
+        end
+      end
+    end
+    local bp=getprev(firstcons)
+    local cn=getnext(current)
+    local last=getnext(c)
+    while cn~=last do
+      if pre_mark[getchar(cn)] then
+        if bp then
+          setnext(bp,cn)
+        end
+        local prev,next=getboth(cn)
+        if next then
+          setprev(next,prev)
+        end
+        setnext(prev,next)
+        if cn==stop then
+          stop=prev
+        end
+        setprev(cn,bp)
+        setlink(cn,firstcons)
+        if firstcons==start then
+          if head==start then
+            head=cn
+          end
+          start=cn
+        end
+        break
+      end
+      cn=getnext(cn)
+    end
+    allreordered=c==stop
+    current=getnext(c)
+  end
+  if reph or vattu then
+    local current,cns=start,nil
+    while current~=stop do
+      local c=current
+      local n=getnext(current)
+      if ra[getchar(current)] and halant[getchar(n)] then
+        c=n
+        n=getnext(n)
+        local b,bn=base,base
+        while bn~=stop do
+          local next=getnext(bn)
+          if dependent_vowel[getchar(next)] then
+            b=next
+          end
+          bn=next
+        end
+        if getprop(current,a_state)==s_rphf then
+          if b~=current then
+            if current==start then
+              if head==start then
+                head=n
+              end
+              start=n
+            end
+            if b==stop then
+              stop=c
+            end
+            local prev=getprev(current)
+            setlink(prev,n)
+            local next=getnext(b)
+            setlink(c,next)
+            setlink(b,current)
+          end
+        elseif cns and getnext(cns)~=current then
+          local cp=getprev(current)
+          local cnsn=getnext(cns)
+          setlink(cp,n)
+          setlink(cns,current)
+          setlink(c,cnsn)
+          if c==stop then
+            stop=cp
+            break
+          end
+          current=getprev(n)
+        end
+      else
+        local char=getchar(current)
+        if consonant[char] then
+          cns=current
+          local next=getnext(cns)
+          if halant[getchar(next)] then
+            cns=next
+          end
+        elseif char==c_nbsp then
+          nbspaces=nbspaces+1
+          cns=current
+          local next=getnext(cns)
+          if halant[getchar(next)] then
+            cns=next
+          end
+        end
+      end
+      current=getnext(current)
+    end
+  end
+  if getchar(base)==c_nbsp then
+    nbspaces=nbspaces-1
+    head=remove_node(head,base)
+    flush_node(base)
+  end
+  return head,stop,nbspaces
+end
+function handlers.devanagari_reorder_matras(head,start) 
+  local current=start 
+  local startfont=getfont(start)
+  local startattr=getprop(start,a_syllabe)
+  while current do
+    local char=ischar(current,startfont)
+    local next=getnext(current)
+    if char and getprop(current,a_syllabe)==startattr then
+      if halant[char] and not getprop(current,a_state) then
+        if next then
+          local char=ischar(next,startfont)
+          if char and zw_char[char] and getprop(next,a_syllabe)==startattr then
+            current=next
+            next=getnext(current)
+          end
+        end
+        local startnext=getnext(start)
+        head=remove_node(head,start)
+        setlink(start,next)
+        setlink(current,start)
+        start=startnext
+        break
+      end
+    else
+      break
+    end
+    current=next
+  end
+  return head,start,true
+end
+function handlers.devanagari_reorder_reph(head,start)
+  local current=getnext(start)
+  local startnext=nil
+  local startprev=nil
+  local startfont=getfont(start)
+  local startattr=getprop(start,a_syllabe)
+  while current do
+    local char=ischar(current,startfont)
+    if char and getprop(current,a_syllabe)==startattr then 
+      if halant[char] and not getprop(current,a_state) then
+        local next=getnext(current)
+        if next then
+          local nextchar=ischar(next,startfont)
+          if nextchar and zw_char[nextchar] and getprop(next,a_syllabe)==startattr then
+            current=next
+            next=getnext(current)
+          end
+        end
+        startnext=getnext(start)
+        head=remove_node(head,start)
+        setlink(start,next)
+        setlink(current,start)
+        start=startnext
+        startattr=getprop(start,a_syllabe)
+        break
+      end
+      current=getnext(current)
+    else
+      break
+    end
+  end
+  if not startnext then
+    current=getnext(start)
+    while current do
+      local char=ischar(current,startfont)
+      if char and getprop(current,a_syllabe)==startattr then 
+        if getprop(current,a_state)==s_pstf then 
+          startnext=getnext(start)
+          head=remove_node(head,start)
+          setlink(getprev(current),start)
+          setlink(start,current)
+          start=startnext
+          startattr=getprop(start,a_syllabe)
+          break
+        end
+        current=getnext(current)
+      else
+        break
+      end
+    end
+  end
+  if not startnext then
+    current=getnext(start)
+    local c=nil
+    while current do
+      local char=ischar(current,startfont)
+      if char and getprop(current,a_syllabe)==startattr then 
+        if not c and mark_above_below_post[char] and reorder_class[char]~="after subscript" then
+          c=current
+        end
+        current=getnext(current)
+      else
+        break
+      end
+    end
+    if c then
+      startnext=getnext(start)
+      head=remove_node(head,start)
+      setlink(getprev(c),start)
+      setlink(start,c)
+      start=startnext
+      startattr=getprop(start,a_syllabe)
+    end
+  end
+  if not startnext then
+    current=start
+    local next=getnext(current)
+    while next do
+      local nextchar=ischar(next,startfont)
+      if nextchar and getprop(next,a_syllabe)==startattr then 
+        current=next
+        next=getnext(current)
+      else
+        break
+      end
+    end
+    if start~=current then
+      startnext=getnext(start)
+      head=remove_node(head,start)
+      setlink(start,getnext(current))
+      setlink(current,start)
+      start=startnext
+    end
+  end
+  return head,start,true
+end
+function handlers.devanagari_reorder_pre_base_reordering_consonants(head,start)
+  local current=start
+  local startnext=nil
+  local startprev=nil
+  local startfont=getfont(start)
+  local startattr=getprop(start,a_syllabe)
+  while current do
+    local char=ischar(current,startfont)
+    if char and getprop(current,a_syllabe)==startattr then
+      local next=getnext(current)
+      if halant[char] and not getprop(current,a_state) then
+        if next then
+          local nextchar=ischar(next,startfont)
+          if nextchar and getprop(next,a_syllabe)==startattr then
+            if nextchar==c_zwnj or nextchar==c_zwj then
+              current=next
+              next=getnext(current)
+            end
+          end
+        end
+        startnext=getnext(start)
+        removenode(start,start)
+        setlink(start,next)
+        setlink(current,start)
+        start=startnext
+        break
+      end
+      current=next
+    else
+      break
+    end
+  end
+  if not startnext then
+    current=getnext(start)
+    startattr=getprop(start,a_syllabe)
+    while current do
+      local char=ischar(current,startfont)
+      if char and getprop(current,a_syllabe)==startattr then
+        if not consonant[char] and getprop(current,a_state) then 
+          startnext=getnext(start)
+          removenode(start,start)
+          setlink(getprev(current),start)
+          setlink(start,current)
+          start=startnext
+          break
+        end
+        current=getnext(current)
+      else
+        break
+      end
+    end
+  end
+  return head,start,true
+end
+function handlers.devanagari_remove_joiners(head,start,kind,lookupname,replacement)
+  local stop=getnext(start)
+  local font=getfont(start)
+  local last=start
+  while stop do
+    local char=ischar(stop,font)
+    if char and (char==c_zwnj or char==c_zwj) then
+      last=stop
+      stop=getnext(stop)
+    else
+      break
+    end
+  end
+  local prev=getprev(start)
+  if stop then
+    setnext(last)
+    setlink(prev,stop)
+  elseif prev then
+    setnext(prev)
+  end
+  if head==start then
+  	head=stop
+  end
+  flush_list(start)
+  return head,stop,true
+end
+local function dev2_initialize(font,attr)
+  local devanagari=fontdata[font].resources.devanagari
+  if devanagari then
+    return devanagari.seqsubset or {},devanagari.reorderreph or {}
+  else
+    return {},{}
+  end
+end
+local function dev2_reorder(head,start,stop,font,attr,nbspaces) 
+  local seqsubset,reorderreph=dev2_initialize(font,attr)
+  local reph=false 
+  local halfpos=nil
+  local basepos=nil
+  local subpos=nil
+  local postpos=nil
+  local locl={}
+  for i=1,#seqsubset do
+    local subset=seqsubset[i]
+    local kind=subset[1]
+    local lookupcache=subset[2]
+    if kind=="rphf" then
+      reph=subset[3]
+      local current=start
+      local last=getnext(stop)
+      while current~=last do
+        if current~=stop then
+          local c=locl[current] or getchar(current)
+          local found=lookupcache[c]
+          if found then
+            local next=getnext(current)
+            local n=locl[next] or getchar(next)
+            if found[n] then  
+              local afternext=next~=stop and getnext(next)
+              if afternext and zw_char[getchar(afternext)] then 
+                current=next
+                current=getnext(current)
+              elseif current==start then
+                setprop(current,a_state,s_rphf)
+                current=next
+              else
+                current=next
+              end
+            end
+          end
+        end
+        current=getnext(current)
+      end
+    elseif kind=="pref" then
+      local current=start
+      local last=getnext(stop)
+      while current~=last do
+        if current~=stop then
+          local c=locl[current] or getchar(current)
+          local found=lookupcache[c]
+          if found then 
+            local next=getnext(current)
+            local n=locl[next] or getchar(next)
+            if found[n] then
+              setprop(current,a_state,s_pref)
+              setprop(next,a_state,s_pref)
+              current=next
+            end
+          end
+        end
+        current=getnext(current)
+      end
+    elseif kind=="half" then 
+      local current=start
+      local last=getnext(stop)
+      while current~=last do
+        if current~=stop then
+          local c=locl[current] or getchar(current)
+          local found=lookupcache[c]
+          if found then
+            local next=getnext(current)
+            local n=locl[next] or getchar(next)
+            if found[n] then
+              if next~=stop and getchar(getnext(next))==c_zwnj then  
+                current=next
+              else
+                setprop(current,a_state,s_half)
+                if not halfpos then
+                  halfpos=current
+                end
+              end
+              current=getnext(current)
+            end
+          end
+        end
+        current=getnext(current)
+      end
+    elseif kind=="blwf" then 
+      local current=start
+      local last=getnext(stop)
+      while current~=last do
+        if current~=stop then
+          local c=locl[current] or getchar(current)
+          local found=lookupcache[c]
+          if found then
+            local next=getnext(current)
+            local n=locl[next] or getchar(next)
+            if found[n] then
+              setprop(current,a_state,s_blwf)
+              setprop(next,a_state,s_blwf)
+              current=next
+              subpos=current
+            end
+          end
+        end
+        current=getnext(current)
+      end
+    elseif kind=="pstf" then 
+      local current=start
+      local last=getnext(stop)
+      while current~=last do
+        if current~=stop then
+          local c=locl[current] or getchar(current)
+          local found=lookupcache[c]
+          if found then
+            local next=getnext(current)
+            local n=locl[next] or getchar(next)
+            if found[n] then
+              setprop(current,a_state,s_pstf)
+              setprop(next,a_state,s_pstf)
+              current=next
+              postpos=current
+            end
+          end
+        end
+        current=getnext(current)
+      end
+    end
+  end
+  reorderreph.coverage={ [reph]=true }
+  local current,base,firstcons=start,nil,nil
+  if getprop(start,a_state)==s_rphf then
+    current=getnext(getnext(start))
+  end
+  if current~=getnext(stop) and getchar(current)==c_nbsp then
+    if current==stop then
+      stop=getprev(stop)
+      head=remove_node(head,current)
+      flush_node(current)
+      return head,stop,nbspaces
+    else
+      nbspaces=nbspaces+1
+      base=current
+      current=getnext(current)
+      if current~=stop then
+        local char=getchar(current)
+        if nukta[char] then
+          current=getnext(current)
+          char=getchar(current)
+        end
+        if char==c_zwj then
+          local next=getnext(current)
+          if current~=stop and next~=stop and halant[getchar(next)] then
+            current=next
+            next=getnext(current)
+            local tmp=getnext(next)
+            local changestop=next==stop
+            setnext(next,nil)
+            setprop(current,a_state,s_pref)
+            current=processcharacters(current,font)
+            setprop(current,a_state,s_blwf)
+            current=processcharacters(current,font)
+            setprop(current,a_state,s_pstf)
+            current=processcharacters(current,font)
+            setprop(current,a_state,unsetvalue)
+            if halant[getchar(current)] then
+              setnext(getnext(current),tmp)
+              local nc=copy_node(current)
+							copyinjection(nc,current)
+              setchar(current,dotted_circle)
+              head=insert_node_after(head,current,nc)
+            else
+              setnext(current,tmp) 
+              if changestop then
+                stop=current
+              end
+            end
+          end
+        end
+      end
+    end
+  else 
+    local last=getnext(stop)
+    while current~=last do  
+      local next=getnext(current)
+      if consonant[getchar(current)] then
+        if not (current~=stop and next~=stop and halant[getchar(next)] and getchar(getnext(next))==c_zwj) then
+          if not firstcons then
+            firstcons=current
+          end
+          local a=getprop(current,a_state)
+          if not (a==s_pref or a==s_blwf or a==s_pstf) then
+            base=current
+          end
+        end
+      end
+      current=next
+    end
+    if not base then
+      base=firstcons
+    end
+  end
+  if not base then
+    if getprop(start,a_state)==s_rphf then
+      setprop(start,a_state,unsetvalue)
+    end
+    return head,stop,nbspaces
+  else
+    if getprop(base,a_state) then
+      setprop(base,a_state,unsetvalue)
+    end
+    basepos=base
+  end
+  if not halfpos then
+    halfpos=base
+  end
+  if not subpos then
+    subpos=base
+  end
+  if not postpos then
+    postpos=subpos or base
+  end
+  local moved={}
+  local current=start
+  local last=getnext(stop)
+  while current~=last do
+    local char,target,cn=locl[current] or getchar(current),nil,getnext(current)
+    local tpm=twopart_mark[char]
+    if tpm then
+      local extra=copy_node(current)
+      copyinjection(extra,current)
+      char=tpm[1]
+      setchar(current,char)
+      setchar(extra,tpm[2])
+      head=insert_node_after(head,current,extra)
+    end
+    if not moved[current] and dependent_vowel[char] then
+      if pre_mark[char] then      
+        moved[current]=true
+        local prev,next=getboth(current)
+        setlink(prev,next)
+        if current==stop then
+          stop=getprev(current)
+        end
+        if halfpos==start then
+          if head==start then
+            head=current
+          end
+          start=current
+        end
+        setlink(getprev(halfpos),current)
+        setlink(current,halfpos)
+        halfpos=current
+      elseif above_mark[char] then  
+        target=basepos
+        if subpos==basepos then
+          subpos=current
+        end
+        if postpos==basepos then
+          postpos=current
+        end
+        basepos=current
+      elseif below_mark[char] then  
+        target=subpos
+        if postpos==subpos then
+          postpos=current
+        end
+        subpos=current
+      elseif post_mark[char] then  
+        target=postpos
+        postpos=current
+      end
+      if mark_above_below_post[char] then
+        local prev=getprev(current)
+        if prev~=target then
+          local next=getnext(current)
+          setlink(prev,next)
+          if current==stop then
+            stop=prev
+          end
+          setlink(current,getnext(target))
+          setlink(target,current)
+        end
+      end
+    end
+    current=cn
+  end
+  local current,c=start,nil
+  while current~=stop do
+    local char=getchar(current)
+    if halant[char] or stress_tone_mark[char] then
+      if not c then
+        c=current
+      end
+    else
+      c=nil
+    end
+    local next=getnext(current)
+    if c and nukta[getchar(next)] then
+      if head==c then
+        head=next
+      end
+      if stop==next then
+        stop=current
+      end
+      setlink(getprev(c),next)
+      local nextnext=getnext(next)
+      setnext(current,nextnext)
+      local nextnextnext=getnext(nextnext)
+      if nextnextnext then
+        setprev(nextnextnext,current)
+      end
+      setlink(nextnext,c)
+    end
+    if stop==current then break end
+    current=getnext(current)
+  end
+  if getchar(base)==c_nbsp then
+    if base==stop then
+      stop=getprev(stop)
+    end
+    nbspaces=nbspaces-1
+    head=remove_node(head,base)
+    flush_node(base)
+  end
+  return head,stop,nbspaces
+end
+local separator={}
+imerge(separator,consonant)
+imerge(separator,independent_vowel)
+imerge(separator,dependent_vowel)
+imerge(separator,vowel_modifier)
+imerge(separator,stress_tone_mark)
+for k,v in next,nukta do separator[k]=true end
+for k,v in next,halant do separator[k]=true end
+local function analyze_next_chars_one(c,font,variant)
+  local n=getnext(c)
+  if not n then
+    return c
+  end
+  if variant==1 then
+    local v=ischar(n,font)
+    if v and nukta[v] then
+      n=getnext(n)
+      if n then
+        v=ischar(n,font)
+      end
+    end
+    if n and v then
+      local nn=getnext(n)
+      if nn then
+        local vv=ischar(nn,font)
+        if vv then
+          local nnn=getnext(nn)
+          if nnn then
+            local vvv=ischar(nnn,font)
+            if vvv then
+              if vv==c_zwj and consonant[vvv] then
+                c=nnn
+              elseif (vv==c_zwnj or vv==c_zwj) and halant[vvv] then
+                local nnnn=getnext(nnn)
+                if nnnn then
+                  local vvvv=ischar(nnnn,font)
+                  if vvvv and consonant[vvvv] then
+                    c=nnnn
+                  end
+                end
+              end
+            end
+          end
+        end
+      end
+    end
+  elseif variant==2 then
+    local v=ischar(n,font)
+    if v and nukta[v] then
+      c=n
+    end
+    n=getnext(c)
+    if n then
+      v=ischar(n,font)
+      if v then
+        local nn=getnext(n)
+        if nn then
+          local vv=ischar(nn,font)
+          if vv and zw_char[v] then
+            n=nn
+            v=vv
+            nn=getnext(nn)
+            vv=nn and ischar(nn,font)
+          end
+          if vv and halant[v] and consonant[vv] then
+            c=nn
+          end
+        end
+      end
+    end
+  end
+  local n=getnext(c)
+  if not n then
+    return c
+  end
+  local v=ischar(n,font)
+  if not v then
+    return c
+  end
+  if dependent_vowel[v] then
+    c=getnext(c)
+    n=getnext(c)
+    if not n then
+      return c
+    end
+    v=ischar(n,font)
+    if not v then
+      return c
+    end
+  end
+  if nukta[v] then
+    c=getnext(c)
+    n=getnext(c)
+    if not n then
+      return c
+    end
+    v=ischar(n,font)
+    if not v then
+      return c
+    end
+  end
+  if halant[v] then
+    c=getnext(c)
+    n=getnext(c)
+    if not n then
+      return c
+    end
+    v=ischar(n,font)
+    if not v then
+      return c
+    end
+  end
+  if vowel_modifier[v] then
+    c=getnext(c)
+    n=getnext(c)
+    if not n then
+      return c
+    end
+    v=ischar(n,font)
+    if not v then
+      return c
+    end
+  end
+  if stress_tone_mark[v] then
+    c=getnext(c)
+    n=getnext(c)
+    if not n then
+      return c
+    end
+    v=ischar(n,font)
+    if not v then
+      return c
+    end
+  end
+  if stress_tone_mark[v] then
+    return n
+  else
+    return c
+  end
+end
+local function analyze_next_chars_two(c,font)
+  local n=getnext(c)
+  if not n then
+    return c
+  end
+  local v=ischar(n,font)
+  if v and nukta[v] then
+    c=n
+  end
+  n=c
+  while true do
+    local nn=getnext(n)
+    if nn then
+      local vv=ischar(nn,font)
+      if vv then
+        if halant[vv] then
+          n=nn
+          local nnn=getnext(nn)
+          if nnn then
+            local vvv=ischar(nnn,font)
+            if vvv and zw_char[vvv] then
+              n=nnn
+            end
+          end
+        elseif vv==c_zwnj or vv==c_zwj then
+          local nnn=getnext(nn)
+          if nnn then
+            local vvv=ischar(nnn,font)
+            if vvv and halant[vvv] then
+              n=nnn
+            end
+          end
+        else
+          break
+        end
+        local nn=getnext(n)
+        if nn then
+          local vv=ischar(nn,font)
+          if vv and consonant[vv] then
+            n=nn
+            local nnn=getnext(nn)
+            if nnn then
+              local vvv=ischar(nnn,font)
+              if vvv and nukta[vvv] then
+                n=nnn
+              end
+            end
+            c=n
+          else
+            break
+          end
+        else
+          break
+        end
+      else
+        break
+      end
+    else
+      break
+    end
+  end
+  if not c then
+    return
+  end
+  local n=getnext(c)
+  if not n then
+    return c
+  end
+  local v=ischar(n,font)
+  if not v then
+    return c
+  end
+  if v==c_anudatta then
+    c=n
+    n=getnext(c)
+    if not n then
+      return c
+    end
+    v=ischar(n,font)
+    if not v then
+      return c
+    end
+  end
+  if halant[v] then
+    c=n
+    n=getnext(c)
+    if not n then
+      return c
+    end
+    v=ischar(n,font)
+    if not v then
+      return c
+    end
+    if v==c_zwnj or v==c_zwj then
+      c=n
+      n=getnext(c)
+      if not n then
+        return c
+      end
+      v=ischar(n,font)
+      if not v then
+        return c
+      end
+    end
+  else
+    if dependent_vowel[v] then
+      c=n
+      n=getnext(c)
+      if not n then
+        return c
+      end
+      v=ischar(n,font)
+      if not v then
+        return c
+      end
+    end
+    if nukta[v] then
+      c=n
+      n=getnext(c)
+      if not n then
+        return c
+      end
+      v=ischar(n,font)
+      if not v then
+        return c
+      end
+    end
+    if halant[v] then
+      c=n
+      n=getnext(c)
+      if not n then
+        return c
+      end
+      v=ischar(n,font)
+      if not v then
+        return c
+      end
+    end
+  end
+  if vowel_modifier[v] then
+    c=n
+    n=getnext(c)
+    if not n then
+      return c
+    end
+    v=ischar(n,font)
+    if not v then
+      return c
+    end
+  end
+  if stress_tone_mark[v] then
+    c=n
+    n=getnext(c)
+    if not n then
+      return c
+    end
+    v=ischar(n,font)
+    if not v then
+      return c
+    end
+  end
+  if stress_tone_mark[v] then
+    return n
+  else
+    return c
+  end
+end
+local function inject_syntax_error(head,current,mark)
+  local signal=copy_node(current)
+	copyinjection(signal,current)
+  if mark==pre_mark then 
+    setchar(signal,dotted_circle)
+  else
+    setchar(current,dotted_circle)
+  end
+  return insert_node_after(head,current,signal)
+end
+function methods.deva(head,font,attr)
+  head=tonut(head)
+  local current=head
+  local start=true
+  local done=false
+  local nbspaces=0
+  while current do
+		local char=ischar(current,font)
+    if char then
+      done=true
+      local syllablestart=current
+      local syllableend=nil
+      local c=current
+      local n=getnext(c)
+	    local first=char
+      if n and ra[first] then
+        local second=ischar(n,font)
+        if second and halant[second] then
+          local n=getnext(n)
+          if n then
+            local third=ischar(n,font)
+            if third then
+              c=n
+              first=third
+            end
+          end
+        end
+      end
+      local standalone=first==c_nbsp
+      if standalone then
+        local prev=getprev(current)
+        if prev then
+          local prevchar=ischar(prev,font)
+          if not prevchar then
+          elseif not separator[prevchar] then
+          else
+            standalone=false
+          end
+        else
+        end
+      end
+      if standalone then
+				local syllableend=analyze_next_chars_one(c,font,2)
+				current=getnext(syllableend)
+        if syllablestart~=syllableend then
+          head,current,nbspaces=deva_reorder(head,syllablestart,syllableend,font,attr,nbspaces)
+          current=getnext(current)
+        end
+      else
+        if consonant[char] then
+          local prevc=true
+          while prevc do
+            prevc=false
+            local n=getnext(current)
+            if not n then
+              break
+            end
+            local v=ischar(n,font)
+            if not v then
+              break
+            end
+            if nukta[v] then
+              n=getnext(n)
+              if not n then
+                break
+              end
+              v=ischar(n,font)
+              if not v then
+                break
+              end
+            end
+            if halant[v] then
+              n=getnext(n)
+              if not n then
+                break
+              end
+              v=ischar(n,font)
+              if not v then
+                break
+              end
+              if v==c_zwnj or v==c_zwj then
+                n=getnext(n)
+                if not n then
+                  break
+                end
+                v=ischar(n,font)
+                if not v then
+                  break
+                end
+              end
+              if consonant[v] then
+                prevc=true
+                current=n
+              end
+            end
+          end
+          local n=getnext(current)
+          if n then
+            local v=ischar(n,font)
+            if v and nukta[v] then
+              current=n
+              n=getnext(current)
+            end
+          end
+          syllableend=current
+          current=n
+          if current then
+            local v=ischar(current,font)
+            if not v then
+            elseif halant[v] then
+              local n=getnext(current)
+              if n then
+                local v=ischar(n,font)
+                if v and zw_char[v] then
+                  syllableend=n
+                  current=getnext(n)
+                else
+                  syllableend=current
+                  current=n
+                end
+              else
+                syllableend=current
+                current=n
+              end
+            else
+              if dependent_vowel[v] then
+                syllableend=current
+                current=getnext(current)
+                v=ischar(current,font)
+              end
+              if v and vowel_modifier[v] then
+                syllableend=current
+                current=getnext(current)
+                v=ischar(current,font)
+              end
+              if v and stress_tone_mark[v] then
+                syllableend=current
+                current=getnext(current)
+              end
+            end
+          end
+          if syllablestart~=syllableend then
+            head,current,nbspaces=deva_reorder(head,syllablestart,syllableend,font,attr,nbspaces)
+            current=getnext(current)
+          end
+        elseif independent_vowel[char] then
+          syllableend=current
+          current=getnext(current)
+          if current then
+            local v=ischar(current,font)
+            if v then
+              if vowel_modifier[v] then
+                syllableend=current
+                current=getnext(current)
+                v=ischar(current,font)
+              end
+              if v and stress_tone_mark[v] then
+                syllableend=current
+                current=getnext(current)
+              end
+            end
+          end
+        else
+          local mark=mark_four[char]
+          if mark then
+            head,current=inject_syntax_error(head,current,mark)
+          end
+          current=getnext(current)
+        end
+      end
+    else
+      current=getnext(current)
+    end
+    start=false
+  end
+  if nbspaces>0 then
+    head=replace_all_nbsp(head)
+  end
+  head=tonode(head)
+  return head,done
+end
+function methods.dev2(head,font,attr)
+  head=tonut(head)
+  local current=head
+  local start=true
+  local done=false
+  local syllabe=0
+  local nbspaces=0
+  while current do
+    local syllablestart=nil
+    local syllableend=nil
+    local char=ischar(current,font)
+    if char then
+      done=true
+      syllablestart=current
+      local c=current
+      local n=getnext(current)
+      if n and ra[char] then
+        local nextchar=ischar(n,font)
+        if nextchar and halant[nextchar] then
+          local n=getnext(n)
+          if n then
+            local nextnextchar=ischar(n,font)
+            if nextnextchar then
+              c=n
+							char=nextnextchar
+            end
+          end
+        end
+      end
+      if independent_vowel[char] then
+        current=analyze_next_chars_one(c,font,1)
+        syllableend=current
+      else
+        local standalone=char==c_nbsp
+        if standalone then
+          nbspaces=nbspaces+1
+          local p=getprev(current)
+          if not p then
+          elseif ischar(p,font) then
+          elseif not separator[getchar(p)] then
+          else
+            standalone=false
+          end
+        end
+        if standalone then
+          current=analyze_next_chars_one(c,font,2)
+          syllableend=current
+        elseif consonant[getchar(current)] then
+          current=analyze_next_chars_two(current,font) 
+          syllableend=current
+        end
+      end
+    end
+    if syllableend then
+      syllabe=syllabe+1
+      local c=syllablestart
+      local n=getnext(syllableend)
+      while c~=n do
+        setprop(c,a_syllabe,syllabe)
+        c=getnext(c)
+      end
+    end
+    if syllableend and syllablestart~=syllableend then
+      head,current,nbspaces=dev2_reorder(head,syllablestart,syllableend,font,attr,nbspaces)
+    end
+    if not syllableend then
+      local char=ischar(current,font)
+      if char and not getprop(current,a_state) then
+        local mark=mark_four[char]
+        if mark then
+          head,current=inject_syntax_error(head,current,mark)
+        end
+      end
+    end
+    start=false
+    current=getnext(current)
+  end
+  if nbspaces>0 then
+    head=replace_all_nbsp(head)
+  end
+  head=tonode(head)
+  return head,done
+end
+methods.mlym=methods.deva
+methods.mlm2=methods.dev2
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-ocl']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local tostring,next,format=tostring,next,string.format
+local round,max=math.round,math.round
+local sortedkeys,sortedhash=table.sortedkeys,table.sortedhash
+local setmetatableindex=table.setmetatableindex
+local formatters=string.formatters
+local tounicode=fonts.mappings.tounicode
+local otf=fonts.handlers.otf
+local f_color=formatters["%f %f %f rg"]
+local f_gray=formatters["%f g"]
+if context then
+  local startactualtext=nil
+  local stopactualtext=nil
+  function otf.getactualtext(s)
+    if not startactualtext then
+      startactualtext=backends.codeinjections.startunicodetoactualtextdirect
+      stopactualtext=backends.codeinjections.stopunicodetoactualtextdirect
+    end
+    return startactualtext(s),stopactualtext()
+  end
+else
+  local tounicode=fonts.mappings.tounicode16
+  function otf.getactualtext(s)
+    return
+      "/Span << /ActualText <feff"..s.."> >> BDC",
+      "EMC"
+  end
+end
+local sharedpalettes={}
+local hash=setmetatableindex(function(t,k)
+  local v={ "pdf","direct",k }
+  t[k]=v
+  return v
+end)
+if context then
+  local colors=attributes.list[attributes.private('color')] or {}
+  local transparencies=attributes.list[attributes.private('transparency')] or {}
+  function otf.registerpalette(name,values)
+    sharedpalettes[name]=values
+    for i=1,#values do
+      local v=values[i]
+      local c=nil
+      local t=nil
+      if type(v)=="table" then
+        c=colors.register(name,"rgb",
+          max(round((v.r or 0)*255),255)/255,
+          max(round((v.g or 0)*255),255)/255,
+          max(round((v.b or 0)*255),255)/255
+        )
+      else
+        c=colors[v]
+        t=transparencies[v]
+      end
+      if c and t then
+        values[i]=hash[lpdf.color(1,c).." "..lpdf.transparency(t)]
+      elseif c then
+        values[i]=hash[lpdf.color(1,c)]
+      elseif t then
+        values[i]=hash[lpdf.color(1,t)]
+      end
+    end
+  end
+else 
+  function otf.registerpalette(name,values)
+    sharedpalettes[name]=values
+    for i=1,#values do
+      local v=values[i]
+      values[i]=hash[f_color(
+        max(round((v.r or 0)*255),255)/255,
+        max(round((v.g or 0)*255),255)/255,
+        max(round((v.b or 0)*255),255)/255
+      )]
+    end
+  end
+end
+local function convert(t,k)
+  local v={}
+  for i=1,#k do
+    local p=k[i]
+    local r,g,b=p[1],p[2],p[3]
+    if r==g and g==b then
+      v[i]=hash[f_gray(r/255)]
+    else
+      v[i]=hash[f_color(r/255,g/255,b/255)]
+    end
+  end
+  t[k]=v
+  return v
+end
+local start={ "pdf","page","q" }
+local stop={ "pdf","raw","Q" }
+local function initializecolr(tfmdata,kind,value) 
+  if value then
+    local resources=tfmdata.resources
+    local palettes=resources.colorpalettes
+    if palettes then
+      local converted=resources.converted
+      if not converted then
+        converted=setmetatableindex(convert)
+        resources.converted=converted
+      end
+      local colorvalues=sharedpalettes[value] or converted[palettes[tonumber(value) or 1] or palettes[1]] or {}
+      local classes=#colorvalues
+      if classes==0 then
+        return
+      end
+      local characters=tfmdata.characters
+      local descriptions=tfmdata.descriptions
+      local properties=tfmdata.properties
+      properties.virtualized=true
+      tfmdata.fonts={
+        { id=0 }
+      }
+      local widths=setmetatableindex(function(t,k)
+        local v={ "right",-k }
+        t[k]=v
+        return v
+      end)
+      local getactualtext=otf.getactualtext
+      local default=colorvalues[#colorvalues]
+      local b,e=getactualtext(tounicode(0xFFFD))
+      local actualb={ "pdf","page",b } 
+      local actuale={ "pdf","page",e }
+      local cache=setmetatableindex(function(t,k)
+        local v={ "char",k } 
+        t[k]=v
+        return v
+      end)
+      for unicode,character in next,characters do
+        local description=descriptions[unicode]
+        if description then
+          local colorlist=description.colors
+          if colorlist then
+            local u=description.unicode or characters[unicode].unicode
+            local w=character.width or 0
+            local s=#colorlist
+            local goback=w~=0 and widths[w] or nil 
+            local t={
+              start,
+              not u and actualb or { "pdf","raw",getactualtext(tounicode(u)) }
+            }
+            local n=2
+            local l=nil
+            for i=1,s do
+              local entry=colorlist[i]
+              local v=colorvalues[entry.class] or default
+              if v and l~=v then
+                n=n+1 t[n]=v
+                l=v
+              end
+              n=n+1 t[n]=cache[entry.slot]
+              if s>1 and i<s and goback then
+                n=n+1 t[n]=goback
+              end
+            end
+            n=n+1 t[n]=actuale
+            n=n+1 t[n]=stop
+            character.commands=t
+          end
+        end
+      end
+    end
+  end
+end
+fonts.handlers.otf.features.register {
+  name="colr",
+  description="color glyphs",
+  manipulators={
+    base=initializecolr,
+    node=initializecolr,
+  }
+}
+do
+  local nofstreams=0
+  local f_name=formatters[ [[pdf-glyph-%05i]] ]
+  local f_used=context and formatters[ [[original:///%s]] ] or formatters[ [[%s]] ]
+  local hashed={}
+  local cache={}
+  function otf.storepdfdata(pdf)
+    local done=hashed[pdf]
+    if not done then
+      nofstreams=nofstreams+1
+      local o,n=epdf.openMemStream(pdf,#pdf,f_name(nofstreams))
+      cache[n]=o 
+      done=f_used(n)
+      hashed[pdf]=done
+    end
+    return nil,done,nil
+  end
+end
+local function pdftovirtual(tfmdata,pdfshapes,kind) 
+  if not tfmdata or not pdfshapes or not kind then
+    return
+  end
+  local characters=tfmdata.characters
+  local properties=tfmdata.properties
+  local parameters=tfmdata.parameters
+  local hfactor=parameters.hfactor
+  properties.virtualized=true
+  tfmdata.fonts={
+    { id=0 }
+  }
+  local getactualtext=otf.getactualtext
+  local storepdfdata=otf.storepdfdata
+  for unicode,character in sortedhash(characters) do 
+    local index=character.index
+    if index then
+      local pdf=pdfshapes[index]
+      local typ=type(pdf)
+      local data=nil
+      local dx=nil
+      local dy=nil
+      if typ=="table" then
+        data=pdf.data
+        dx=pdf.dx or 0
+        dy=pdf.dy or 0
+      elseif typ=="string" then
+        data=pdf
+        dx=0
+        dy=0
+      end
+      if data then
+        local setcode,name,nilcode=storepdfdata(data)
+        if name then
+          local bt,et=getactualtext(unicode)
+          local wd=character.width or 0
+          local ht=character.height or 0
+          local dp=character.depth or 0
+          character.commands={
+            { "pdf","direct",bt },
+            { "down",dp+dy*hfactor },
+            { "right",dx*hfactor },
+            { "image",{ filename=name,width=wd,height=ht,depth=dp } },
+            { "pdf","direct",et },
+          }
+          character[kind]=true
+        end
+      end
+    end
+  end
+end
+local otfsvg=otf.svg or {}
+otf.svg=otfsvg
+otf.svgenabled=true
+do
+  local report_svg=logs.reporter("fonts","svg conversion")
+  local loaddata=io.loaddata
+  local savedata=io.savedata
+  local remove=os.remove
+  if context and xml.convert then
+    local xmlconvert=xml.convert
+    local xmlfirst=xml.first
+    function otfsvg.filterglyph(entry,index)
+      local svg=xmlconvert(entry.data)
+      local root=svg and xmlfirst(svg,"/svg[@id='glyph"..index.."']")
+      local data=root and tostring(root)
+      return data
+    end
+  else
+    function otfsvg.filterglyph(entry,index) 
+      return entry.data
+    end
+  end
+  local runner=sandbox and sandbox.registerrunner {
+    name="otfsvg",
+    program="inkscape",
+    method="pipeto",
+    template="--shell > temp-otf-svg-shape.log",
+    reporter=report_svg,
+  }
+  if not runner then
+    runner=function()
+      return io.open("inkscape --shell > temp-otf-svg-shape.log","w")
+    end
+  end
+  function otfsvg.topdf(svgshapes)
+    local pdfshapes={}
+    local inkscape=runner()
+    if inkscape then
+      local nofshapes=#svgshapes
+      local f_svgfile=formatters["temp-otf-svg-shape-%i.svg"]
+      local f_pdffile=formatters["temp-otf-svg-shape-%i.pdf"]
+      local f_convert=formatters["%s --export-pdf=%s\n"]
+      local filterglyph=otfsvg.filterglyph
+      local nofdone=0
+      report_svg("processing %i svg containers",nofshapes)
+      statistics.starttiming()
+      for i=1,nofshapes do
+        local entry=svgshapes[i]
+        for index=entry.first,entry.last do
+          local data=filterglyph(entry,index)
+          if data and data~="" then
+            local svgfile=f_svgfile(index)
+            local pdffile=f_pdffile(index)
+            savedata(svgfile,data)
+            inkscape:write(f_convert(svgfile,pdffile))
+            pdfshapes[index]=true
+            nofdone=nofdone+1
+            if nofdone%100==0 then
+              report_svg("%i shapes processed",nofdone)
+            end
+          end
+        end
+      end
+      inkscape:write("quit\n")
+      inkscape:close()
+      report_svg("processing %i pdf results",nofshapes)
+      for index in next,pdfshapes do
+        local svgfile=f_svgfile(index)
+        local pdffile=f_pdffile(index)
+        pdfshapes[index]=loaddata(pdffile)
+        remove(svgfile)
+        remove(pdffile)
+      end
+      statistics.stoptiming()
+      if statistics.elapsedseconds then
+        report_svg("svg conversion time %s",statistics.elapsedseconds() or "-")
+      end
+    end
+    return pdfshapes
+  end
+end
+local function initializesvg(tfmdata,kind,value) 
+  if value and otf.svgenabled then
+    local svg=tfmdata.properties.svg
+    local hash=svg and svg.hash
+    local timestamp=svg and svg.timestamp
+    if not hash then
+      return
+    end
+    local pdffile=containers.read(otf.pdfcache,hash)
+    local pdfshapes=pdffile and pdffile.pdfshapes
+    if not pdfshapes or pdffile.timestamp~=timestamp then
+      local svgfile=containers.read(otf.svgcache,hash)
+      local svgshapes=svgfile and svgfile.svgshapes
+      pdfshapes=svgshapes and otfsvg.topdf(svgshapes) or {}
+      containers.write(otf.pdfcache,hash,{
+        pdfshapes=pdfshapes,
+        timestamp=timestamp,
+      })
+    end
+    pdftovirtual(tfmdata,pdfshapes,"svg")
+  end
+end
+fonts.handlers.otf.features.register {
+  name="svg",
+  description="svg glyphs",
+  manipulators={
+    base=initializesvg,
+    node=initializesvg,
+  }
+}
+local otfsbix=otf.sbix or {}
+otf.sbix=otfsbix
+otf.sbixenabled=true
+do
+  local report_sbix=logs.reporter("fonts","sbix conversion")
+  local loaddata=io.loaddata
+  local savedata=io.savedata
+  local remove=os.remove
+  local runner=sandbox and sandbox.registerrunner {
+    name="otfsbix",
+    program="gm",
+    template="convert -quality 100 temp-otf-sbix-shape.sbix temp-otf-sbix-shape.pdf > temp-otf-svg-shape.log",
+  }
+  if not runner then
+    runner=function()
+      return os.execute("gm convert -quality 100 temp-otf-sbix-shape.sbix temp-otf-sbix-shape.pdf > temp-otf-svg-shape.log")
+    end
+  end
+  function otfsbix.topdf(sbixshapes)
+    local pdfshapes={}
+    local sbixfile="temp-otf-sbix-shape.sbix"
+    local pdffile="temp-otf-sbix-shape.pdf"
+    local nofdone=0
+    local indices=sortedkeys(sbixshapes) 
+    local nofindices=#indices
+    report_sbix("processing %i sbix containers",nofindices)
+    statistics.starttiming()
+    for i=1,nofindices do
+      local index=indices[i]
+      local entry=sbixshapes[index]
+      local data=entry.data
+      local x=entry.x
+      local y=entry.y
+      savedata(sbixfile,data)
+      runner()
+      pdfshapes[index]={
+        x=x~=0 and x or nil,
+        y=y~=0 and y or nil,
+        data=loaddata(pdffile),
+      }
+      nofdone=nofdone+1
+      if nofdone%100==0 then
+        report_sbix("%i shapes processed",nofdone)
+      end
+    end
+    report_sbix("processing %i pdf results",nofindices)
+    remove(sbixfile)
+    remove(pdffile)
+    statistics.stoptiming()
+    if statistics.elapsedseconds then
+      report_sbix("sbix conversion time %s",statistics.elapsedseconds() or "-")
+    end
+    return pdfshapes
+  end
+end
+local function initializesbix(tfmdata,kind,value) 
+  if value and otf.sbixenabled then
+    local sbix=tfmdata.properties.sbix
+    local hash=sbix and sbix.hash
+    local timestamp=sbix and sbix.timestamp
+    if not hash then
+      return
+    end
+    local pdffile=containers.read(otf.pdfcache,hash)
+    local pdfshapes=pdffile and pdffile.pdfshapes
+    if not pdfshapes or pdffile.timestamp~=timestamp then
+      local sbixfile=containers.read(otf.sbixcache,hash)
+      local sbixshapes=sbixfile and sbixfile.sbixshapes
+      pdfshapes=sbixshapes and otfsbix.topdf(sbixshapes) or {}
+      containers.write(otf.pdfcache,hash,{
+        pdfshapes=pdfshapes,
+        timestamp=timestamp,
+      })
+    end
+    pdftovirtual(tfmdata,pdfshapes,"sbix")
+  end
+end
+fonts.handlers.otf.features.register {
+  name="sbix",
+  description="sbix glyphs",
+  manipulators={
+    base=initializesbix,
+    node=initializesbix,
+  }
+}
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-otc']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local format,insert,sortedkeys,tohash=string.format,table.insert,table.sortedkeys,table.tohash
+local type,next=type,next
+local lpegmatch=lpeg.match
+local utfbyte,utflen,utfsplit=utf.byte,utf.len,utf.split
+local trace_loading=false trackers.register("otf.loading",function(v) trace_loading=v end)
+local report_otf=logs.reporter("fonts","otf loading")
+local fonts=fonts
+local otf=fonts.handlers.otf
+local registerotffeature=otf.features.register
+local setmetatableindex=table.setmetatableindex
+local normalized={
+  substitution="substitution",
+  single="substitution",
+  ligature="ligature",
+  alternate="alternate",
+  multiple="multiple",
+  kern="kern",
+  pair="pair",
+  single="single",
+  chainsubstitution="chainsubstitution",
+  chainposition="chainposition",
+}
+local types={
+  substitution="gsub_single",
+  ligature="gsub_ligature",
+  alternate="gsub_alternate",
+  multiple="gsub_multiple",
+  kern="gpos_pair",
+  pair="gpos_pair",
+  single="gpos_single",
+  chainsubstitution="gsub_contextchain",
+  chainposition="gpos_contextchain",
+}
+local names={
+  gsub_single="gsub",
+  gsub_multiple="gsub",
+  gsub_alternate="gsub",
+  gsub_ligature="gsub",
+  gsub_context="gsub",
+  gsub_contextchain="gsub",
+  gsub_reversecontextchain="gsub",
+  gpos_single="gpos",
+  gpos_pair="gpos",
+  gpos_cursive="gpos",
+  gpos_mark2base="gpos",
+  gpos_mark2ligature="gpos",
+  gpos_mark2mark="gpos",
+  gpos_context="gpos",
+  gpos_contextchain="gpos",
+}
+setmetatableindex(types,function(t,k) t[k]=k return k end) 
+local everywhere={ ["*"]={ ["*"]=true } } 
+local noflags={ false,false,false,false }
+local function getrange(sequences,category)
+  local count=#sequences
+  local first=nil
+  local last=nil
+  for i=1,count do
+    local t=sequences[i].type
+    if t and names[t]==category then
+      if not first then
+        first=i
+      end
+      last=i
+    end
+  end
+  return first or 1,last or count
+end
+local function validspecification(specification,name)
+  local dataset=specification.dataset
+  if dataset then
+  elseif specification[1] then
+    dataset=specification
+    specification={ dataset=dataset }
+  else
+    dataset={ { data=specification.data } }
+    specification.data=nil
+    specification.dataset=dataset
+  end
+  local first=dataset[1]
+  if first then
+    first=first.data
+  end
+  if not first then
+    report_otf("invalid feature specification, no dataset")
+    return
+  end
+  if type(name)~="string" then
+    name=specification.name or first.name
+  end
+  if type(name)~="string" then
+    report_otf("invalid feature specification, no name")
+    return
+  end
+  local n=#dataset
+  if n>0 then
+    for i=1,n do
+      setmetatableindex(dataset[i],specification)
+    end
+    return specification,name
+  end
+end
+local function addfeature(data,feature,specifications)
+  if not specifications then
+    report_otf("missing specification")
+    return
+  end
+  local descriptions=data.descriptions
+  local resources=data.resources
+  local features=resources.features
+  local sequences=resources.sequences
+  if not features or not sequences then
+    report_otf("missing specification")
+    return
+  end
+  local alreadydone=resources.alreadydone
+  if not alreadydone then
+    alreadydone={}
+    resources.alreadydone=alreadydone
+  end
+  if alreadydone[specifications] then
+    return
+  else
+    alreadydone[specifications]=true
+  end
+  local fontfeatures=resources.features or everywhere
+  local unicodes=resources.unicodes
+  local splitter=lpeg.splitter(" ",unicodes)
+  local done=0
+  local skip=0
+  local aglunicodes=false
+  local specifications=validspecification(specifications,feature)
+  if not specifications then
+    return
+  end
+  local function tounicode(code)
+    if not code then
+      return
+    end
+    if type(code)=="number" then
+      return code
+    end
+    local u=unicodes[code]
+    if u then
+      return u
+    end
+    if utflen(code)==1 then
+      u=utfbyte(code)
+      if u then
+        return u
+      end
+    end
+    if not aglunicodes then
+      aglunicodes=fonts.encodings.agl.unicodes 
+    end
+    return aglunicodes[code]
+  end
+  local coverup=otf.coverup
+  local coveractions=coverup.actions
+  local stepkey=coverup.stepkey
+  local register=coverup.register
+  local function prepare_substitution(list,featuretype,nocheck)
+    local coverage={}
+    local cover=coveractions[featuretype]
+    for code,replacement in next,list do
+      local unicode=tounicode(code)
+      local description=descriptions[unicode]
+      if not nocheck and not description then
+        skip=skip+1
+      else
+        if type(replacement)=="table" then
+          replacement=replacement[1]
+        end
+        replacement=tounicode(replacement)
+        if replacement and descriptions[replacement] then
+          cover(coverage,unicode,replacement)
+          done=done+1
+        else
+          skip=skip+1
+        end
+      end
+    end
+    return coverage
+  end
+  local function prepare_alternate(list,featuretype,nocheck)
+    local coverage={}
+    local cover=coveractions[featuretype]
+    for code,replacement in next,list do
+      local unicode=tounicode(code)
+      local description=descriptions[unicode]
+      if not nocheck and not description then
+        skip=skip+1
+      elseif type(replacement)=="table" then
+        local r={}
+        for i=1,#replacement do
+          local u=tounicode(replacement[i])
+          r[i]=(nocheck or descriptions[u]) and u or unicode
+        end
+        cover(coverage,unicode,r)
+        done=done+1
+      else
+        local u=tounicode(replacement)
+        if u then
+          cover(coverage,unicode,{ u })
+          done=done+1
+        else
+          skip=skip+1
+        end
+      end
+    end
+    return coverage
+  end
+  local function prepare_multiple(list,featuretype,nocheck)
+    local coverage={}
+    local cover=coveractions[featuretype]
+    for code,replacement in next,list do
+      local unicode=tounicode(code)
+      local description=descriptions[unicode]
+      if not nocheck and not description then
+        skip=skip+1
+      elseif type(replacement)=="table" then
+        local r,n={},0
+        for i=1,#replacement do
+          local u=tounicode(replacement[i])
+          if nocheck or descriptions[u] then
+            n=n+1
+            r[n]=u
+          end
+        end
+        if n>0 then
+          cover(coverage,unicode,r)
+          done=done+1
+        else
+          skip=skip+1
+        end
+      else
+        local u=tounicode(replacement)
+        if u then
+          cover(coverage,unicode,{ u })
+          done=done+1
+        else
+          skip=skip+1
+        end
+      end
+    end
+    return coverage
+  end
+  local function prepare_ligature(list,featuretype,nocheck)
+    local coverage={}
+    local cover=coveractions[featuretype]
+    for code,ligature in next,list do
+      local unicode=tounicode(code)
+      local description=descriptions[unicode]
+      if not nocheck and not description then
+        skip=skip+1
+      else
+        if type(ligature)=="string" then
+          ligature={ lpegmatch(splitter,ligature) }
+        end
+        local present=true
+        for i=1,#ligature do
+          local l=ligature[i]
+          local u=tounicode(l)
+          if nocheck or descriptions[u] then
+            ligature[i]=u
+          else
+            present=false
+            break
+          end
+        end
+        if present then
+          cover(coverage,unicode,ligature)
+          done=done+1
+        else
+          skip=skip+1
+        end
+      end
+    end
+    return coverage
+  end
+  local function resetspacekerns()
+    data.properties.hasspacekerns=true
+    data.resources .spacekerns=nil
+  end
+  local function prepare_kern(list,featuretype)
+    local coverage={}
+    local cover=coveractions[featuretype]
+    local isspace=false
+    for code,replacement in next,list do
+      local unicode=tounicode(code)
+      local description=descriptions[unicode]
+      if description and type(replacement)=="table" then
+        local r={}
+        for k,v in next,replacement do
+          local u=tounicode(k)
+          if u then
+            r[u]=v
+            if u==32 then
+              isspace=true
+            end
+          end
+        end
+        if next(r) then
+          cover(coverage,unicode,r)
+          done=done+1
+          if unicode==32 then
+            isspace=true
+          end
+        else
+          skip=skip+1
+        end
+      else
+        skip=skip+1
+      end
+    end
+    if isspace then
+      resetspacekerns()
+    end
+    return coverage
+  end
+  local function prepare_pair(list,featuretype)
+    local coverage={}
+    local cover=coveractions[featuretype]
+    if cover then
+      for code,replacement in next,list do
+        local unicode=tounicode(code)
+        local description=descriptions[unicode]
+        if description and type(replacement)=="table" then
+          local r={}
+          for k,v in next,replacement do
+            local u=tounicode(k)
+            if u then
+              r[u]=v
+              if u==32 then
+                isspace=true
+              end
+            end
+          end
+          if next(r) then
+            cover(coverage,unicode,r)
+            done=done+1
+            if unicode==32 then
+              isspace=true
+            end
+          else
+            skip=skip+1
+          end
+        else
+          skip=skip+1
+        end
+      end
+      if isspace then
+        resetspacekerns()
+      end
+    else
+      report_otf("unknown cover type %a",featuretype)
+    end
+    return coverage
+  end
+  local prepare_single=prepare_pair 
+  local function prepare_chain(list,featuretype,sublookups)
+    local rules=list.rules
+    local coverage={}
+    if rules then
+      local rulehash={}
+      local rulesize=0
+      local lookuptype=types[featuretype]
+      for nofrules=1,#rules do
+        local rule=rules[nofrules]
+        local current=rule.current
+        local before=rule.before
+        local after=rule.after
+        local replacements=rule.replacements or false
+        local sequence={}
+        local nofsequences=0
+        if before then
+          for n=1,#before do
+            nofsequences=nofsequences+1
+            sequence[nofsequences]=before[n]
+          end
+        end
+        local start=nofsequences+1
+        for n=1,#current do
+          nofsequences=nofsequences+1
+          sequence[nofsequences]=current[n]
+        end
+        local stop=nofsequences
+        if after then
+          for n=1,#after do
+            nofsequences=nofsequences+1
+            sequence[nofsequences]=after[n]
+          end
+        end
+        local lookups=rule.lookups or false
+        local subtype=nil
+        if lookups and sublookups then
+          for k,v in next,lookups do
+            local t=type(v)
+            if t=="table" then
+              for i=1,#v do
+                local vi=v[i]
+                if type(vi)~="table" then
+                  v[i]={ vi }
+                end
+              end
+            elseif t=="number" then
+              local lookup=sublookups[v]
+              if lookup then
+                lookups[k]={ lookup }
+                if not subtype then
+                  subtype=lookup.type
+                end
+              else
+                lookups[k]={ false } 
+              end
+            else
+              lookups[k]={ false } 
+            end
+          end
+        end
+        if nofsequences>0 then
+          local hashed={}
+          for i=1,nofsequences do
+            local t={}
+            local s=sequence[i]
+            for i=1,#s do
+              local u=tounicode(s[i])
+              if u then
+                t[u]=true
+              end
+            end
+            hashed[i]=t
+          end
+          sequence=hashed
+          rulesize=rulesize+1
+          rulehash[rulesize]={
+            nofrules,
+            lookuptype,
+            sequence,
+            start,
+            stop,
+            lookups,
+            replacements,
+            subtype,
+          }
+          for unic in next,sequence[start] do
+            local cu=coverage[unic]
+            if not cu then
+              coverage[unic]=rulehash 
+            end
+          end
+          sequence.n=nofsequences
+        end
+      end
+      rulehash.n=rulesize
+    end
+    return coverage
+  end
+  local dataset=specifications.dataset
+  local function report(name,category,position,first,last,sequences)
+    report_otf("injecting name %a of category %a at position %i in [%i,%i] of [%i,%i]",
+      name,category,position,first,last,1,#sequences)
+  end
+  local function inject(specification,sequences,sequence,first,last,category,name)
+    local position=specification.position or false
+    if not position then
+      position=specification.prepend
+      if position==true then
+        if trace_loading then
+          report(name,category,first,first,last,sequences)
+        end
+        insert(sequences,first,sequence)
+        return
+      end
+    end
+    if not position then
+      position=specification.append
+      if position==true then
+        if trace_loading then
+          report(name,category,last+1,first,last,sequences)
+        end
+        insert(sequences,last+1,sequence)
+        return
+      end
+    end
+    local kind=type(position)
+    if kind=="string" then
+      local index=false
+      for i=first,last do
+        local s=sequences[i]
+        local f=s.features
+        if f then
+          for k in next,f do
+            if k==position then
+                index=i
+              break
+            end
+          end
+          if index then
+            break
+          end
+        end
+      end
+      if index then
+        position=index
+      else
+        position=last+1
+      end
+    elseif kind=="number" then
+      if position<0 then
+        position=last-position+1
+      end
+      if position>last then
+        position=last+1
+      elseif position<first then
+        position=first
+      end
+    else
+      position=last+1
+    end
+    if trace_loading then
+      report(name,category,position,first,last,sequences)
+    end
+    insert(sequences,position,sequence)
+  end
+  for s=1,#dataset do
+    local specification=dataset[s]
+    local valid=specification.valid 
+    local feature=specification.name or feature
+    if not feature or feature=="" then
+      report_otf("no valid name given for extra feature")
+    elseif not valid or valid(data,specification,feature) then 
+      local initialize=specification.initialize
+      if initialize then
+        specification.initialize=initialize(specification,data) and initialize or nil
+      end
+      local askedfeatures=specification.features or everywhere
+      local askedsteps=specification.steps or specification.subtables or { specification.data } or {}
+      local featuretype=normalized[specification.type or "substitution"] or "substitution"
+      local featureflags=specification.flags or noflags
+      local nocheck=specification.nocheck
+      local futuresteps=specification.futuresteps
+      local featureorder=specification.order or { feature }
+      local featurechain=(featuretype=="chainsubstitution" or featuretype=="chainposition") and 1 or 0
+      local nofsteps=0
+      local steps={}
+      local sublookups=specification.lookups
+      local category=nil
+      if sublookups then
+        local s={}
+        for i=1,#sublookups do
+          local specification=sublookups[i]
+          local askedsteps=specification.steps or specification.subtables or { specification.data } or {}
+          local featuretype=normalized[specification.type or "substitution"] or "substitution"
+          local featureflags=specification.flags or noflags
+          local nofsteps=0
+          local steps={}
+          for i=1,#askedsteps do
+            local list=askedsteps[i]
+            local coverage=nil
+            local format=nil
+            if featuretype=="substitution" then
+              coverage=prepare_substitution(list,featuretype,nocheck)
+            elseif featuretype=="ligature" then
+              coverage=prepare_ligature(list,featuretype,nocheck)
+            elseif featuretype=="alternate" then
+              coverage=prepare_alternate(list,featuretype,nocheck)
+            elseif featuretype=="multiple" then
+              coverage=prepare_multiple(list,featuretype,nocheck)
+            elseif featuretype=="kern" or featuretype=="move" then
+              format=featuretype
+              coverage=prepare_kern(list,featuretype)
+            elseif featuretype=="pair" then
+              format="pair"
+              coverage=prepare_pair(list,featuretype)
+            elseif featuretype=="single" then
+              format="single"
+              coverage=prepare_single(list,featuretype)
+            end
+            if coverage and next(coverage) then
+              nofsteps=nofsteps+1
+              steps[nofsteps]=register(coverage,featuretype,format,feature,nofsteps,descriptions,resources)
+            end
+          end
+          setmetatableindex(steps,fonts.helpers.mergesteps)
+          s[i]={
+            [stepkey]=steps,
+            nofsteps=nofsteps,
+            flags=featureflags,
+            type=types[featuretype],
+          }
+        end
+        sublookups=s
+      end
+      for i=1,#askedsteps do
+        local list=askedsteps[i]
+        local coverage=nil
+        local format=nil
+        if featuretype=="substitution" then
+          category="gsub"
+          coverage=prepare_substitution(list,featuretype,nocheck)
+        elseif featuretype=="ligature" then
+          category="gsub"
+          coverage=prepare_ligature(list,featuretype,nocheck)
+        elseif featuretype=="alternate" then
+          category="gsub"
+          coverage=prepare_alternate(list,featuretype,nocheck)
+        elseif featuretype=="multiple" then
+          category="gsub"
+          coverage=prepare_multiple(list,featuretype,nocheck)
+        elseif featuretype=="kern" or featuretype=="move" then
+          category="gpos"
+          format=featuretype
+          coverage=prepare_kern(list,featuretype)
+        elseif featuretype=="pair" then
+          category="gpos"
+          format="pair"
+          coverage=prepare_pair(list,featuretype)
+        elseif featuretype=="single" then
+          category="gpos"
+          format="single"
+          coverage=prepare_single(list,featuretype)
+        elseif featuretype=="chainsubstitution" then
+          category="gsub"
+          coverage=prepare_chain(list,featuretype,sublookups)
+        elseif featuretype=="chainposition" then
+          category="gpos"
+          coverage=prepare_chain(list,featuretype,sublookups)
+        else
+          report_otf("not registering feature %a, unknown category",feature)
+          return
+        end
+        if coverage and next(coverage) then
+          nofsteps=nofsteps+1
+          steps[nofsteps]=register(coverage,featuretype,format,feature,nofsteps,descriptions,resources)
+        end
+      end
+      if nofsteps>0 then
+        for k,v in next,askedfeatures do
+          if v[1] then
+            askedfeatures[k]=tohash(v)
+          end
+        end
+        setmetatableindex(steps,fonts.helpers.mergesteps)
+        if featureflags[1] then featureflags[1]="mark" end
+        if featureflags[2] then featureflags[2]="ligature" end
+        if featureflags[3] then featureflags[3]="base" end
+        local steptype=types[featuretype]
+        local sequence={
+          chain=featurechain,
+          features={ [feature]=askedfeatures },
+          flags=featureflags,
+          name=feature,
+          order=featureorder,
+          [stepkey]=steps,
+          nofsteps=nofsteps,
+          type=steptype,
+        }
+        local first,last=getrange(sequences,category)
+        inject(specification,sequences,sequence,first,last,category,feature)
+        local features=fontfeatures[category]
+        if not features then
+          features={}
+          fontfeatures[category]=features
+        end
+        local k=features[feature]
+        if not k then
+          k={}
+          features[feature]=k
+        end
+        for script,languages in next,askedfeatures do
+          local kk=k[script]
+          if not kk then
+            kk={}
+            k[script]=kk
+          end
+          for language,value in next,languages do
+            kk[language]=value
+          end
+        end
+      end
+    end
+  end
+  if trace_loading then
+    report_otf("registering feature %a, affected glyphs %a, skipped glyphs %a",feature,done,skip)
+  end
+end
+otf.enhancers.addfeature=addfeature
+local extrafeatures={}
+local knownfeatures={}
+function otf.addfeature(name,specification)
+  if type(name)=="table" then
+    specification=name
+  end
+  if type(specification)~="table" then
+    report_otf("invalid feature specification, no valid table")
+    return
+  end
+  specification,name=validspecification(specification,name)
+  if name and specification then
+    local slot=knownfeatures[name]
+    if not slot then
+      slot=#extrafeatures+1
+      knownfeatures[name]=slot
+    elseif specification.overload==false then
+      slot=#extrafeatures+1
+      knownfeatures[name]=slot
+    else
+    end
+    specification.name=name 
+    extrafeatures[slot]=specification
+  end
+end
+local function enhance(data,filename,raw)
+  for slot=1,#extrafeatures do
+    local specification=extrafeatures[slot]
+    addfeature(data,specification.name,specification)
+  end
+end
+otf.enhancers.enhance=enhance
+otf.enhancers.register("check extra features",enhance)
+local tlig={
+  [0x2013]={ 0x002D,0x002D },
+  [0x2014]={ 0x002D,0x002D,0x002D },
+}
+local tlig_specification={
+  type="ligature",
+  features=everywhere,
+  data=tlig,
+  order={ "tlig" },
+  flags=noflags,
+  prepend=true,
+}
+otf.addfeature("tlig",tlig_specification)
+registerotffeature {
+  name='tlig',
+  description='tex ligatures',
+}
+local trep={
+  [0x0027]=0x2019,
+}
+local trep_specification={
+  type="substitution",
+  features=everywhere,
+  data=trep,
+  order={ "trep" },
+  flags=noflags,
+  prepend=true,
+}
+otf.addfeature("trep",trep_specification)
+registerotffeature {
+  name='trep',
+  description='tex replacements',
+}
+local anum_arabic={
+  [0x0030]=0x0660,
+  [0x0031]=0x0661,
+  [0x0032]=0x0662,
+  [0x0033]=0x0663,
+  [0x0034]=0x0664,
+  [0x0035]=0x0665,
+  [0x0036]=0x0666,
+  [0x0037]=0x0667,
+  [0x0038]=0x0668,
+  [0x0039]=0x0669,
+}
+local anum_persian={
+  [0x0030]=0x06F0,
+  [0x0031]=0x06F1,
+  [0x0032]=0x06F2,
+  [0x0033]=0x06F3,
+  [0x0034]=0x06F4,
+  [0x0035]=0x06F5,
+  [0x0036]=0x06F6,
+  [0x0037]=0x06F7,
+  [0x0038]=0x06F8,
+  [0x0039]=0x06F9,
+}
+local function valid(data)
+  local features=data.resources.features
+  if features then
+    for k,v in next,features do
+      for k,v in next,v do
+        if v.arab then
+          return true
+        end
+      end
+    end
+  end
+end
+local anum_specification={
+  {
+    type="substitution",
+    features={ arab={ urd=true,dflt=true } },
+    order={ "anum" },
+    data=anum_arabic,
+    flags=noflags,
+    valid=valid,
+  },
+  {
+    type="substitution",
+    features={ arab={ urd=true } },
+    order={ "anum" },
+    data=anum_persian,
+    flags=noflags,
+    valid=valid,
+  },
+}
+otf.addfeature("anum",anum_specification) 
+registerotffeature {
+  name='anum',
+  description='arabic digits',
+}
+local lookups={}
+local protect={}
+local revert={}
+local zwj={ 0x200C }
+otf.addfeature {
+  name="blockligatures",
+  type="chainsubstitution",
+  nocheck=true,
+  prepend=true,
+  future=true,
+  lookups={
+    {
+      type="multiple",
+      data=lookups,
+    },
+  },
+  data={
+    rules=protect,
+  }
+}
+otf.addfeature {
+  name="blockligatures",
+  type="chainsubstitution",
+  nocheck=true,
+  append=true,
+  overload=false,
+  lookups={
+    {
+      type="ligature",
+      data=lookups,
+    },
+  },
+  data={
+    rules=revert,
+  }
+}
+registerotffeature {
+  name='blockligatures',
+  description='block certain ligatures',
+}
+local settings_to_array=utilities.parsers and utilities.parsers.settings_to_array
+            or function(s) return string.split(s,",") end 
+local function blockligatures(str)
+  local t=settings_to_array(str)
+  for i=1,#t do
+    local ti=utfsplit(t[i])
+    if #ti>1 then
+      local one=ti[1]
+      local two=ti[2]
+      lookups[one]={ one,0x200C }
+      local one={ one }
+      local two={ two }
+      local new=#protect+1
+      protect[new]={
+        current={ one,two },
+        lookups={ 1 },
+      }
+      revert[new]={
+        current={ one,zwj },
+        after={ two },
+        lookups={ 1 },
+      }
+    end
+  end
+end
+otf.helpers.blockligatures=blockligatures
+if context then
+  interfaces.implement {
+    name="blockligatures",
+    arguments="string",
+    actions=blockligatures,
+  }
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-onr']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local fonts,logs,trackers,resolvers=fonts,logs,trackers,resolvers
+local next,type,tonumber,rawget,rawset=next,type,tonumber,rawget,rawset
+local match,lower,gsub,strip,find=string.match,string.lower,string.gsub,string.strip,string.find
+local char,byte,sub=string.char,string.byte,string.sub
+local abs=math.abs
+local bxor,rshift=bit32.bxor,bit32.rshift
+local P,S,R,Cmt,C,Ct,Cs,Carg,Cf,Cg=lpeg.P,lpeg.S,lpeg.R,lpeg.Cmt,lpeg.C,lpeg.Ct,lpeg.Cs,lpeg.Carg,lpeg.Cf,lpeg.Cg
+local lpegmatch,patterns=lpeg.match,lpeg.patterns
+local trace_indexing=false trackers.register("afm.indexing",function(v) trace_indexing=v end)
+local trace_loading=false trackers.register("afm.loading",function(v) trace_loading=v end)
+local report_afm=logs.reporter("fonts","afm loading")
+local report_pfb=logs.reporter("fonts","pfb loading")
+local handlers=fonts.handlers
+local afm=handlers.afm or {}
+handlers.afm=afm
+local readers=afm.readers or {}
+afm.readers=readers
+afm.version=1.513
+local get_indexes,get_shapes
+do
+  local decrypt
+  do
+    local r,c1,c2,n=0,0,0,0
+    local function step(c)
+      local cipher=byte(c)
+      local plain=bxor(cipher,rshift(r,8))
+      r=((cipher+r)*c1+c2)%65536
+      return char(plain)
+    end
+    decrypt=function(binary,initial,seed)
+      r,c1,c2,n=initial,52845,22719,seed
+      binary=gsub(binary,".",step)
+      return sub(binary,n+1)
+    end
+  end
+  local charstrings=P("/CharStrings")
+  local subroutines=P("/Subrs")
+  local encoding=P("/Encoding")
+  local dup=P("dup")
+  local put=P("put")
+  local array=P("array")
+  local name=P("/")*C((R("az","AZ","09")+S("-_."))^1)
+  local digits=R("09")^1
+  local cardinal=digits/tonumber
+  local spaces=P(" ")^1
+  local spacing=patterns.whitespace^0
+  local routines,vector,chars,n,m
+  local initialize=function(str,position,size)
+    n=0
+    m=size 
+    return position+1
+  end
+  local setroutine=function(str,position,index,size,filename)
+    local forward=position+tonumber(size)
+    local stream=decrypt(sub(str,position+1,forward),4330,4)
+    routines[index]={ byte(stream,1,#stream) }
+    return forward
+  end
+  local setvector=function(str,position,name,size,filename)
+    local forward=position+tonumber(size)
+    if n>=m then
+      return #str
+    elseif forward<#str then
+      if n==0 and name~=".notdef" then
+        report_pfb("reserving .notdef at index 0 in %a",filename) 
+        n=n+1
+      end
+      vector[n]=name
+      n=n+1
+      return forward
+    else
+      return #str
+    end
+  end
+  local setshapes=function(str,position,name,size,filename)
+    local forward=position+tonumber(size)
+    local stream=sub(str,position+1,forward)
+    if n>m then
+      return #str
+    elseif forward<#str then
+      if n==0 and name~=".notdef" then
+        report_pfb("reserving .notdef at index 0 in %a",filename) 
+        n=n+1
+      end
+      vector[n]=name
+      n=n+1
+      chars [n]=decrypt(stream,4330,4)
+      return forward
+    else
+      return #str
+    end
+  end
+  local p_rd=spacing*(P("RD")+P("-|"))
+  local p_np=spacing*(P("NP")+P("|"))
+  local p_nd=spacing*(P("ND")+P("|"))
+  local p_filterroutines=
+    (1-subroutines)^0*subroutines*spaces*Cmt(cardinal,initialize)*(Cmt(cardinal*spaces*cardinal*p_rd*Carg(1),setroutine)*p_np+P(1))^1
+  local p_filtershapes=
+    (1-charstrings)^0*charstrings*spaces*Cmt(cardinal,initialize)*(Cmt(name*spaces*cardinal*p_rd*Carg(1),setshapes)*p_nd+P(1))^1
+  local p_filternames=Ct (
+    (1-charstrings)^0*charstrings*spaces*Cmt(cardinal,initialize)*(Cmt(name*spaces*cardinal*Carg(1),setvector)+P(1))^1
+  )
+  local p_filterencoding=(1-encoding)^0*encoding*spaces*digits*spaces*array*(1-dup)^0*Cf(
+      Ct("")*Cg(spacing*dup*spaces*cardinal*spaces*name*spaces*put)^1
+,rawset)
+  local function loadpfbvector(filename,shapestoo)
+    local data=io.loaddata(resolvers.findfile(filename))
+    if not data then
+      report_pfb("no data in %a",filename)
+      return
+    end
+    if not (find(data,"!PS%-AdobeFont%-") or find(data,"%%!FontType1")) then
+      report_pfb("no font in %a",filename)
+      return
+    end
+    local ascii,binary=match(data,"(.*)eexec%s+......(.*)")
+    if not binary then
+      report_pfb("no binary data in %a",filename)
+      return
+    end
+    binary=decrypt(binary,55665,4)
+    local names={}
+    local encoding=lpegmatch(p_filterencoding,ascii)
+    local glyphs={}
+    routines,vector,chars={},{},{}
+    if shapestoo then
+      lpegmatch(p_filterroutines,binary,1,filename)
+      lpegmatch(p_filtershapes,binary,1,filename)
+      local data={
+        dictionaries={
+          {
+            charstrings=chars,
+            charset=vector,
+            subroutines=routines,
+          }
+        },
+      }
+      fonts.handlers.otf.readers.parsecharstrings(false,data,glyphs,true,true)
+    else
+      lpegmatch(p_filternames,binary,1,filename)
+    end
+    names=vector
+    routines,vector,chars=nil,nil,nil
+    return names,encoding,glyphs
+  end
+  local pfb=handlers.pfb or {}
+  handlers.pfb=pfb
+  pfb.loadvector=loadpfbvector
+  get_indexes=function(data,pfbname)
+    local vector=loadpfbvector(pfbname)
+    if vector then
+      local characters=data.characters
+      if trace_loading then
+        report_afm("getting index data from %a",pfbname)
+      end
+      for index=0,#vector do 
+        local name=vector[index]
+        local char=characters[name]
+        if char then
+          if trace_indexing then
+            report_afm("glyph %a has index %a",name,index)
+          end
+          char.index=index
+        else
+          if trace_indexing then
+            report_afm("glyph %a has index %a but no data",name,index)
+          end
+        end
+      end
+    end
+  end
+  get_shapes=function(pfbname)
+    local vector,encoding,glyphs=loadpfbvector(pfbname,true)
+    return glyphs
+  end
+end
+local spacer=patterns.spacer
+local whitespace=patterns.whitespace
+local lineend=patterns.newline
+local spacing=spacer^0
+local number=spacing*S("+-")^-1*(R("09")+S("."))^1/tonumber
+local name=spacing*C((1-whitespace)^1)
+local words=spacing*((1-lineend)^1/strip)
+local rest=(1-lineend)^0
+local fontdata=Carg(1)
+local semicolon=spacing*P(";")
+local plus=spacing*P("plus")*number
+local minus=spacing*P("minus")*number
+local function addkernpair(data,one,two,value)
+  local chr=data.characters[one]
+  if chr then
+    local kerns=chr.kerns
+    if kerns then
+      kerns[two]=tonumber(value)
+    else
+      chr.kerns={ [two]=tonumber(value) }
+    end
+  end
+end
+local p_kernpair=(fontdata*P("KPX")*name*name*number)/addkernpair
+local chr=false
+local ind=0
+local function start(data,version)
+  data.metadata.afmversion=version
+  ind=0
+  chr={}
+end
+local function stop()
+  ind=0
+  chr=false
+end
+local function setindex(i)
+  if i<0 then
+    ind=ind+1 
+  else
+    ind=i
+  end
+  chr={
+    index=ind
+  }
+end
+local function setwidth(width)
+  chr.width=width
+end
+local function setname(data,name)
+  data.characters[name]=chr
+end
+local function setboundingbox(boundingbox)
+  chr.boundingbox=boundingbox
+end
+local function setligature(plus,becomes)
+  local ligatures=chr.ligatures
+  if ligatures then
+    ligatures[plus]=becomes
+  else
+    chr.ligatures={ [plus]=becomes }
+  end
+end
+local p_charmetric=((
+  P("C")*number/setindex+P("WX")*number/setwidth+P("N")*fontdata*name/setname+P("B")*Ct((number)^4)/setboundingbox+P("L")*(name)^2/setligature
+ )*semicolon )^1
+local p_charmetrics=P("StartCharMetrics")*number*(p_charmetric+(1-P("EndCharMetrics")))^0*P("EndCharMetrics")
+local p_kernpairs=P("StartKernPairs")*number*(p_kernpair+(1-P("EndKernPairs" )))^0*P("EndKernPairs" )
+local function set_1(data,key,a)   data.metadata[lower(key)]=a      end
+local function set_2(data,key,a,b)  data.metadata[lower(key)]={ a,b }  end
+local function set_3(data,key,a,b,c) data.metadata[lower(key)]={ a,b,c } end
+local p_parameters=P(false)+fontdata*((P("FontName")+P("FullName")+P("FamilyName"))/lower)*words/function(data,key,value)
+    data.metadata[key]=value
+  end+fontdata*((P("Weight")+P("Version"))/lower)*name/function(data,key,value)
+    data.metadata[key]=value
+  end+fontdata*P("IsFixedPitch")*name/function(data,pitch)
+    data.metadata.monospaced=toboolean(pitch,true)
+  end+fontdata*P("FontBBox")*Ct(number^4)/function(data,boundingbox)
+    data.metadata.boundingbox=boundingbox
+ end+fontdata*((P("CharWidth")+P("CapHeight")+P("XHeight")+P("Descender")+P("Ascender")+P("ItalicAngle"))/lower)*number/function(data,key,value)
+    data.metadata[key]=value
+  end+P("Comment")*spacing*(P(false)+(fontdata*C("DESIGNSIZE")*number*rest)/set_1 
++(fontdata*C("TFM designsize")*number*rest)/set_1+(fontdata*C("DesignSize")*number*rest)/set_1+(fontdata*C("CODINGSCHEME")*words*rest)/set_1 
++(fontdata*C("CHECKSUM")*number*words*rest)/set_1 
++(fontdata*C("SPACE")*number*plus*minus*rest)/set_3 
++(fontdata*C("QUAD")*number*rest)/set_1 
++(fontdata*C("EXTRASPACE")*number*rest)/set_1 
++(fontdata*C("NUM")*number*number*number*rest)/set_3 
++(fontdata*C("DENOM")*number*number*rest)/set_2 
++(fontdata*C("SUP")*number*number*number*rest)/set_3 
++(fontdata*C("SUB")*number*number*rest)/set_2 
++(fontdata*C("SUPDROP")*number*rest)/set_1 
++(fontdata*C("SUBDROP")*number*rest)/set_1 
++(fontdata*C("DELIM")*number*number*rest)/set_2 
++(fontdata*C("AXISHEIGHT")*number*rest)/set_1 
+  )
+local fullparser=(P("StartFontMetrics")*fontdata*name/start )*(p_charmetrics+p_kernpairs+p_parameters+(1-P("EndFontMetrics")) )^0*(P("EndFontMetrics")/stop )
+local infoparser=(P("StartFontMetrics")*fontdata*name/start )*(p_parameters+(1-P("EndFontMetrics")) )^0*(P("EndFontMetrics")/stop )
+local function read(filename,parser)
+  local afmblob=io.loaddata(filename)
+  if afmblob then
+    local data={
+      resources={
+        filename=resolvers.unresolve(filename),
+        version=afm.version,
+        creator="context mkiv",
+      },
+      properties={
+        hasitalics=false,
+      },
+      goodies={},
+      metadata={
+        filename=file.removesuffix(file.basename(filename))
+      },
+      characters={
+      },
+      descriptions={
+      },
+    }
+    if trace_loading then
+      report_afm("parsing afm file %a",filename)
+    end
+    lpegmatch(parser,afmblob,1,data)
+    return data
+  else
+    if trace_loading then
+      report_afm("no valid afm file %a",filename)
+    end
+    return nil
+  end
+end
+function readers.loadfont(afmname,pfbname)
+  local data=read(resolvers.findfile(afmname),fullparser)
+  if data then
+    if not pfbname or pfbname=="" then
+      pfbname=resolvers.findfile(file.replacesuffix(file.nameonly(afmname),"pfb"))
+    end
+    if pfbname and pfbname~="" then
+      data.resources.filename=resolvers.unresolve(pfbname)
+      get_indexes(data,pfbname)
+      return data
+    else 
+      report_afm("no pfb file for %a",afmname)
+    end
+  end
+end
+function readers.loadshapes(filename)
+  local fullname=resolvers.findfile(filename) or ""
+  if fullname=="" then
+    return {
+      filename="not found: "..filename,
+      glyphs={}
+    }
+  else
+    return {
+      filename=fullname,
+      format="opentype",
+      glyphs=get_shapes(fullname) or {},
+      units=1000,
+    }
+  end
+end
+function readers.getinfo(filename)
+  local data=read(resolvers.findfile(filename),infoparser)
+  if data then
+    return data.metadata
+  end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-one']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local fonts,logs,trackers,containers,resolvers=fonts,logs,trackers,containers,resolvers
+local next,type,tonumber,rawget=next,type,tonumber,rawget
+local match,gmatch,lower,gsub,strip,find=string.match,string.gmatch,string.lower,string.gsub,string.strip,string.find
+local char,byte,sub=string.char,string.byte,string.sub
+local abs=math.abs
+local bxor,rshift=bit32.bxor,bit32.rshift
+local P,S,R,Cmt,C,Ct,Cs,Carg=lpeg.P,lpeg.S,lpeg.R,lpeg.Cmt,lpeg.C,lpeg.Ct,lpeg.Cs,lpeg.Carg
+local lpegmatch,patterns=lpeg.match,lpeg.patterns
+local trace_features=false trackers.register("afm.features",function(v) trace_features=v end)
+local trace_indexing=false trackers.register("afm.indexing",function(v) trace_indexing=v end)
+local trace_loading=false trackers.register("afm.loading",function(v) trace_loading=v end)
+local trace_defining=false trackers.register("fonts.defining",function(v) trace_defining=v end)
+local report_afm=logs.reporter("fonts","afm loading")
+local setmetatableindex=table.setmetatableindex
+local derivetable=table.derive
+local findbinfile=resolvers.findbinfile
+local privateoffset=fonts.constructors and fonts.constructors.privateoffset or 0xF0000 
+local definers=fonts.definers
+local readers=fonts.readers
+local constructors=fonts.constructors
+local afm=constructors.handlers.afm
+local pfb=constructors.handlers.pfb
+local otf=fonts.handlers.otf
+local otfreaders=otf.readers
+local otfenhancers=otf.enhancers
+local afmfeatures=constructors.features.afm
+local registerafmfeature=afmfeatures.register
+local afmenhancers=constructors.enhancers.afm
+local registerafmenhancer=afmenhancers.register
+afm.version=1.512 
+afm.cache=containers.define("fonts","one",afm.version,true)
+afm.autoprefixed=true 
+afm.helpdata={} 
+afm.syncspace=true 
+local overloads=fonts.mappings.overloads
+local applyruntimefixes=fonts.treatments and fonts.treatments.applyfixes
+function afm.load(filename)
+  filename=resolvers.findfile(filename,'afm') or ""
+  if filename~="" and not fonts.names.ignoredfile(filename) then
+    local name=file.removesuffix(file.basename(filename))
+    local data=containers.read(afm.cache,name)
+    local attr=lfs.attributes(filename)
+    local size,time=attr.size or 0,attr.modification or 0
+    local pfbfile=file.replacesuffix(name,"pfb")
+    local pfbname=resolvers.findfile(pfbfile,"pfb") or ""
+    if pfbname=="" then
+      pfbname=resolvers.findfile(file.basename(pfbfile),"pfb") or ""
+    end
+    local pfbsize,pfbtime=0,0
+    if pfbname~="" then
+      local attr=lfs.attributes(pfbname)
+      pfbsize=attr.size or 0
+      pfbtime=attr.modification or 0
+    end
+    if not data or data.size~=size or data.time~=time or data.pfbsize~=pfbsize or data.pfbtime~=pfbtime then
+      report_afm("reading %a",filename)
+      data=afm.readers.loadfont(filename,pfbname)
+      if data then
+        afmenhancers.apply(data,filename)
+        fonts.mappings.addtounicode(data,filename)
+        otfreaders.pack(data)
+        data.size=size
+        data.time=time
+        data.pfbsize=pfbsize
+        data.pfbtime=pfbtime
+        report_afm("saving %a in cache",name)
+        data=containers.write(afm.cache,name,data)
+        data=containers.read(afm.cache,name)
+      end
+    end
+    if data then
+      otfreaders.unpack(data)
+      otfreaders.expand(data) 
+      otfreaders.addunicodetable(data) 
+      otfenhancers.apply(data,filename,data)
+      if applyruntimefixes then
+        applyruntimefixes(filename,data)
+      end
+    end
+    return data
+  end
+end
+local uparser=fonts.mappings.makenameparser() 
+local function enhance_unify_names(data,filename)
+  local unicodevector=fonts.encodings.agl.unicodes 
+  local unicodes={}
+  local names={}
+  local private=data.private or privateoffset
+  local descriptions=data.descriptions
+  for name,blob in next,data.characters do
+    local code=unicodevector[name] 
+    if not code then
+      code=lpegmatch(uparser,name)
+      if type(code)~="number" then
+        code=private
+        private=private+1
+        report_afm("assigning private slot %U for unknown glyph name %a",code,name)
+      end
+    end
+    local index=blob.index
+    unicodes[name]=code
+    names[name]=index
+    blob.name=name
+    descriptions[code]={
+      boundingbox=blob.boundingbox,
+      width=blob.width,
+      kerns=blob.kerns,
+      index=index,
+      name=name,
+    }
+  end
+  for unicode,description in next,descriptions do
+    local kerns=description.kerns
+    if kerns then
+      local krn={}
+      for name,kern in next,kerns do
+        local unicode=unicodes[name]
+        if unicode then
+          krn[unicode]=kern
+        else
+        end
+      end
+      description.kerns=krn
+    end
+  end
+  data.characters=nil
+  data.private=private
+  local resources=data.resources
+  local filename=resources.filename or file.removesuffix(file.basename(filename))
+  resources.filename=resolvers.unresolve(filename) 
+  resources.unicodes=unicodes 
+  resources.marks={}
+end
+local everywhere={ ["*"]={ ["*"]=true } } 
+local noflags={ false,false,false,false }
+local function enhance_normalize_features(data)
+  local ligatures=setmetatableindex("table")
+  local kerns=setmetatableindex("table")
+  local extrakerns=setmetatableindex("table")
+  for u,c in next,data.descriptions do
+    local l=c.ligatures
+    local k=c.kerns
+    local e=c.extrakerns
+    if l then
+      ligatures[u]=l
+      for u,v in next,l do
+        l[u]={ ligature=v }
+      end
+      c.ligatures=nil
+    end
+    if k then
+      kerns[u]=k
+      for u,v in next,k do
+        k[u]=v 
+      end
+      c.kerns=nil
+    end
+    if e then
+      extrakerns[u]=e
+      for u,v in next,e do
+        e[u]=v 
+      end
+      c.extrakerns=nil
+    end
+  end
+  local features={
+    gpos={},
+    gsub={},
+  }
+  local sequences={
+  }
+  if next(ligatures) then
+    features.gsub.liga=everywhere
+    data.properties.hasligatures=true
+    sequences[#sequences+1]={
+      features={
+        liga=everywhere,
+      },
+      flags=noflags,
+      name="s_s_0",
+      nofsteps=1,
+      order={ "liga" },
+      type="gsub_ligature",
+      steps={
+        {
+          coverage=ligatures,
+        },
+      },
+    }
+  end
+  if next(kerns) then
+    features.gpos.kern=everywhere
+    data.properties.haskerns=true
+    sequences[#sequences+1]={
+      features={
+        kern=everywhere,
+      },
+      flags=noflags,
+      name="p_s_0",
+      nofsteps=1,
+      order={ "kern" },
+      type="gpos_pair",
+      steps={
+        {
+          format="kern",
+          coverage=kerns,
+        },
+      },
+    }
+  end
+  if next(extrakerns) then
+    features.gpos.extrakerns=everywhere
+    data.properties.haskerns=true
+    sequences[#sequences+1]={
+      features={
+        extrakerns=everywhere,
+      },
+      flags=noflags,
+      name="p_s_1",
+      nofsteps=1,
+      order={ "extrakerns" },
+      type="gpos_pair",
+      steps={
+        {
+          format="kern",
+          coverage=extrakerns,
+        },
+      },
+    }
+  end
+  data.resources.features=features
+  data.resources.sequences=sequences
+end
+local function enhance_fix_names(data)
+  for k,v in next,data.descriptions do
+    local n=v.name
+    local r=overloads[n]
+    if r then
+      local name=r.name
+      if trace_indexing then
+        report_afm("renaming characters %a to %a",n,name)
+      end
+      v.name=name
+      v.unicode=r.unicode
+    end
+  end
+end
+local addthem=function(rawdata,ligatures)
+  if ligatures then
+    local descriptions=rawdata.descriptions
+    local resources=rawdata.resources
+    local unicodes=resources.unicodes
+    for ligname,ligdata in next,ligatures do
+      local one=descriptions[unicodes[ligname]]
+      if one then
+        for _,pair in next,ligdata do
+          local two,three=unicodes[pair[1]],unicodes[pair[2]]
+          if two and three then
+            local ol=one.ligatures
+            if ol then
+              if not ol[two] then
+                ol[two]=three
+              end
+            else
+              one.ligatures={ [two]=three }
+            end
+          end
+        end
+      end
+    end
+  end
+end
+local function enhance_add_ligatures(rawdata)
+  addthem(rawdata,afm.helpdata.ligatures)
+end
+local function enhance_add_extra_kerns(rawdata) 
+  local descriptions=rawdata.descriptions
+  local resources=rawdata.resources
+  local unicodes=resources.unicodes
+  local function do_it_left(what)
+    if what then
+      for unicode,description in next,descriptions do
+        local kerns=description.kerns
+        if kerns then
+          local extrakerns
+          for complex,simple in next,what do
+            complex=unicodes[complex]
+            simple=unicodes[simple]
+            if complex and simple then
+              local ks=kerns[simple]
+              if ks and not kerns[complex] then
+                if extrakerns then
+                  extrakerns[complex]=ks
+                else
+                  extrakerns={ [complex]=ks }
+                end
+              end
+            end
+          end
+          if extrakerns then
+            description.extrakerns=extrakerns
+          end
+        end
+      end
+    end
+  end
+  local function do_it_copy(what)
+    if what then
+      for complex,simple in next,what do
+        complex=unicodes[complex]
+        simple=unicodes[simple]
+        if complex and simple then
+          local complexdescription=descriptions[complex]
+          if complexdescription then 
+            local simpledescription=descriptions[complex]
+            if simpledescription then
+              local extrakerns
+              local kerns=simpledescription.kerns
+              if kerns then
+                for unicode,kern in next,kerns do
+                  if extrakerns then
+                    extrakerns[unicode]=kern
+                  else
+                    extrakerns={ [unicode]=kern }
+                  end
+                end
+              end
+              local extrakerns=simpledescription.extrakerns
+              if extrakerns then
+                for unicode,kern in next,extrakerns do
+                  if extrakerns then
+                    extrakerns[unicode]=kern
+                  else
+                    extrakerns={ [unicode]=kern }
+                  end
+                end
+              end
+              if extrakerns then
+                complexdescription.extrakerns=extrakerns
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+  do_it_left(afm.helpdata.leftkerned)
+  do_it_left(afm.helpdata.bothkerned)
+  do_it_copy(afm.helpdata.bothkerned)
+  do_it_copy(afm.helpdata.rightkerned)
+end
+local function adddimensions(data) 
+  if data then
+    for unicode,description in next,data.descriptions do
+      local bb=description.boundingbox
+      if bb then
+        local ht,dp=bb[4],-bb[2]
+        if ht==0 or ht<0 then
+        else
+          description.height=ht
+        end
+        if dp==0 or dp<0 then
+        else
+          description.depth=dp
+        end
+      end
+    end
+  end
+end
+local function copytotfm(data)
+  if data and data.descriptions then
+    local metadata=data.metadata
+    local resources=data.resources
+    local properties=derivetable(data.properties)
+    local descriptions=derivetable(data.descriptions)
+    local goodies=derivetable(data.goodies)
+    local characters={}
+    local parameters={}
+    local unicodes=resources.unicodes
+    for unicode,description in next,data.descriptions do 
+      characters[unicode]={}
+    end
+    local filename=constructors.checkedfilename(resources)
+    local fontname=metadata.fontname or metadata.fullname
+    local fullname=metadata.fullname or metadata.fontname
+    local endash=0x0020 
+    local emdash=0x2014
+    local spacer="space"
+    local spaceunits=500
+    local monospaced=metadata.monospaced
+    local charwidth=metadata.charwidth
+    local italicangle=metadata.italicangle
+    local charxheight=metadata.xheight and metadata.xheight>0 and metadata.xheight
+    properties.monospaced=monospaced
+    parameters.italicangle=italicangle
+    parameters.charwidth=charwidth
+    parameters.charxheight=charxheight
+    if properties.monospaced then
+      if descriptions[endash] then
+        spaceunits,spacer=descriptions[endash].width,"space"
+      end
+      if not spaceunits and descriptions[emdash] then
+        spaceunits,spacer=descriptions[emdash].width,"emdash"
+      end
+      if not spaceunits and charwidth then
+        spaceunits,spacer=charwidth,"charwidth"
+      end
+    else
+      if descriptions[endash] then
+        spaceunits,spacer=descriptions[endash].width,"space"
+      end
+      if not spaceunits and charwidth then
+        spaceunits,spacer=charwidth,"charwidth"
+      end
+    end
+    spaceunits=tonumber(spaceunits)
+    if spaceunits<200 then
+    end
+    parameters.slant=0
+    parameters.space=spaceunits
+    parameters.space_stretch=500
+    parameters.space_shrink=333
+    parameters.x_height=400
+    parameters.quad=1000
+    if italicangle and italicangle~=0 then
+      parameters.italicangle=italicangle
+      parameters.italicfactor=math.cos(math.rad(90+italicangle))
+      parameters.slant=- math.tan(italicangle*math.pi/180)
+    end
+    if monospaced then
+      parameters.space_stretch=0
+      parameters.space_shrink=0
+    elseif afm.syncspace then
+      parameters.space_stretch=spaceunits/2
+      parameters.space_shrink=spaceunits/3
+    end
+    parameters.extra_space=parameters.space_shrink
+    if charxheight then
+      parameters.x_height=charxheight
+    else
+      local x=0x0078 
+      if x then
+        local x=descriptions[x]
+        if x then
+          parameters.x_height=x.height
+        end
+      end
+    end
+    if metadata.sup then
+      local dummy={ 0,0,0 }
+      parameters[ 1]=metadata.designsize    or 0
+      parameters[ 2]=metadata.checksum     or 0
+      parameters[ 3],
+      parameters[ 4],
+      parameters[ 5]=unpack(metadata.space   or dummy)
+      parameters[ 6]=metadata.quad    or 0
+      parameters[ 7]=metadata.extraspace or 0
+      parameters[ 8],
+      parameters[ 9],
+      parameters[10]=unpack(metadata.num    or dummy)
+      parameters[11],
+      parameters[12]=unpack(metadata.denom   or dummy)
+      parameters[13],
+      parameters[14],
+      parameters[15]=unpack(metadata.sup    or dummy)
+      parameters[16],
+      parameters[17]=unpack(metadata.sub    or dummy)
+      parameters[18]=metadata.supdrop  or 0
+      parameters[19]=metadata.subdrop  or 0
+      parameters[20],
+      parameters[21]=unpack(metadata.delim   or dummy)
+      parameters[22]=metadata.axisheight or 0
+    end
+    parameters.designsize=(metadata.designsize or 10)*65536
+    parameters.ascender=abs(metadata.ascender or 0)
+    parameters.descender=abs(metadata.descender or 0)
+    parameters.units=1000
+    properties.spacer=spacer
+    properties.encodingbytes=2
+    properties.format=fonts.formats[filename] or "type1"
+    properties.filename=filename
+    properties.fontname=fontname
+    properties.fullname=fullname
+    properties.psname=fullname
+    properties.name=filename or fullname or fontname
+    properties.private=properties.private or data.private or privateoffset
+    if next(characters) then
+      return {
+        characters=characters,
+        descriptions=descriptions,
+        parameters=parameters,
+        resources=resources,
+        properties=properties,
+        goodies=goodies,
+      }
+    end
+  end
+  return nil
+end
+function afm.setfeatures(tfmdata,features)
+  local okay=constructors.initializefeatures("afm",tfmdata,features,trace_features,report_afm)
+  if okay then
+    return constructors.collectprocessors("afm",tfmdata,features,trace_features,report_afm)
+  else
+    return {} 
+  end
+end
+local function addtables(data)
+  local resources=data.resources
+  local lookuptags=resources.lookuptags
+  local unicodes=resources.unicodes
+  if not lookuptags then
+    lookuptags={}
+    resources.lookuptags=lookuptags
+  end
+  setmetatableindex(lookuptags,function(t,k)
+    local v=type(k)=="number" and ("lookup "..k) or k
+    t[k]=v
+    return v
+  end)
+  if not unicodes then
+    unicodes={}
+    resources.unicodes=unicodes
+    setmetatableindex(unicodes,function(t,k)
+      setmetatableindex(unicodes,nil)
+      for u,d in next,data.descriptions do
+        local n=d.name
+        if n then
+          t[n]=u
+        end
+      end
+      return rawget(t,k)
+    end)
+  end
+  constructors.addcoreunicodes(unicodes) 
+end
+local function afmtotfm(specification)
+  local afmname=specification.filename or specification.name
+  if specification.forced=="afm" or specification.format=="afm" then 
+    if trace_loading then
+      report_afm("forcing afm format for %a",afmname)
+    end
+  else
+    local tfmname=findbinfile(afmname,"ofm") or ""
+    if tfmname~="" then
+      if trace_loading then
+        report_afm("fallback from afm to tfm for %a",afmname)
+      end
+      return 
+    end
+  end
+  if afmname~="" then
+    local features=constructors.checkedfeatures("afm",specification.features.normal)
+    specification.features.normal=features
+    constructors.hashinstance(specification,true)
+    specification=definers.resolve(specification) 
+    local cache_id=specification.hash
+    local tfmdata=containers.read(constructors.cache,cache_id) 
+    if not tfmdata then
+      local rawdata=afm.load(afmname)
+      if rawdata and next(rawdata) then
+        addtables(rawdata)
+        adddimensions(rawdata)
+        tfmdata=copytotfm(rawdata)
+        if tfmdata and next(tfmdata) then
+          local shared=tfmdata.shared
+          if not shared then
+            shared={}
+            tfmdata.shared=shared
+          end
+          shared.rawdata=rawdata
+          shared.dynamics={}
+          tfmdata.changed={}
+          shared.features=features
+          shared.processes=afm.setfeatures(tfmdata,features)
+        end
+      elseif trace_loading then
+        report_afm("no (valid) afm file found with name %a",afmname)
+      end
+      tfmdata=containers.write(constructors.cache,cache_id,tfmdata)
+    end
+    return tfmdata
+  end
+end
+local function read_from_afm(specification)
+  local tfmdata=afmtotfm(specification)
+  if tfmdata then
+    tfmdata.properties.name=specification.name
+    tfmdata=constructors.scale(tfmdata,specification)
+    local allfeatures=tfmdata.shared.features or specification.features.normal
+    constructors.applymanipulators("afm",tfmdata,allfeatures,trace_features,report_afm)
+    fonts.loggers.register(tfmdata,'afm',specification)
+  end
+  return tfmdata
+end
+registerafmfeature {
+  name="mode",
+  description="mode",
+  initializers={
+    base=otf.modeinitializer,
+    node=otf.modeinitializer,
+  }
+}
+registerafmfeature {
+  name="features",
+  description="features",
+  default=true,
+  initializers={
+    node=otf.nodemodeinitializer,
+    base=otf.basemodeinitializer,
+  },
+  processors={
+    node=otf.featuresprocessor,
+  }
+}
+fonts.formats.afm="type1"
+fonts.formats.pfb="type1"
+local function check_afm(specification,fullname)
+  local foundname=findbinfile(fullname,'afm') or "" 
+  if foundname=="" then
+    foundname=fonts.names.getfilename(fullname,"afm") or ""
+  end
+  if foundname=="" and afm.autoprefixed then
+    local encoding,shortname=match(fullname,"^(.-)%-(.*)$") 
+    if encoding and shortname and fonts.encodings.known[encoding] then
+      shortname=findbinfile(shortname,'afm') or "" 
+      if shortname~="" then
+        foundname=shortname
+        if trace_defining then
+          report_afm("stripping encoding prefix from filename %a",afmname)
+        end
+      end
+    end
+  end
+  if foundname~="" then
+    specification.filename=foundname
+    specification.format="afm"
+    return read_from_afm(specification)
+  end
+end
+function readers.afm(specification,method)
+  local fullname=specification.filename or ""
+  local tfmdata=nil
+  if fullname=="" then
+    local forced=specification.forced or ""
+    if forced~="" then
+      tfmdata=check_afm(specification,specification.name.."."..forced)
+    end
+    if not tfmdata then
+      local check_tfm=readers.check_tfm
+      method=(check_tfm and (method or definers.method or "afm or tfm")) or "afm"
+      if method=="tfm" then
+        tfmdata=check_tfm(specification,specification.name)
+      elseif method=="afm" then
+        tfmdata=check_afm(specification,specification.name)
+      elseif method=="tfm or afm" then
+        tfmdata=check_tfm(specification,specification.name) or check_afm(specification,specification.name)
+      else 
+        tfmdata=check_afm(specification,specification.name) or check_tfm(specification,specification.name)
+      end
+    end
+  else
+    tfmdata=check_afm(specification,fullname)
+  end
+  return tfmdata
+end
+function readers.pfb(specification,method) 
+  local original=specification.specification
+  if trace_defining then
+    report_afm("using afm reader for %a",original)
+  end
+  specification.forced="afm"
+  local function swap(name)
+    local value=specification[swap]
+    if value then
+      specification[swap]=gsub("%.pfb",".afm",1)
+    end
+  end
+  swap("filename")
+  swap("fullname")
+  swap("forcedname")
+  swap("specification")
+  return readers.afm(specification,method)
+end
+registerafmenhancer("unify names",enhance_unify_names)
+registerafmenhancer("add ligatures",enhance_add_ligatures)
+registerafmenhancer("add extra kerns",enhance_add_extra_kerns)
+registerafmenhancer("normalize features",enhance_normalize_features)
+registerafmenhancer("check extra features",otfenhancers.enhance)
+registerafmenhancer("fix names",enhance_fix_names)
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-afk']={
+  version=1.001,
+  comment="companion to font-lib.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files",
+  dataonly=true,
+}
+local allocate=utilities.storage.allocate
+fonts.handlers.afm.helpdata={
+  ligatures=allocate { 
+    ['f']={ 
+      { 'f','ff' },
+      { 'i','fi' },
+      { 'l','fl' },
+    },
+    ['ff']={
+      { 'i','ffi' }
+    },
+    ['fi']={
+      { 'i','fii' }
+    },
+    ['fl']={
+      { 'i','fli' }
+    },
+    ['s']={
+      { 't','st' }
+    },
+    ['i']={
+      { 'j','ij' }
+    },
+  },
+  texligatures=allocate {
+    ['quoteleft']={
+      { 'quoteleft','quotedblleft' }
+    },
+    ['quoteright']={
+      { 'quoteright','quotedblright' }
+    },
+    ['hyphen']={
+      { 'hyphen','endash' }
+    },
+    ['endash']={
+      { 'hyphen','emdash' }
+    }
+  },
+  leftkerned=allocate {
+    AEligature="A",aeligature="a",
+    OEligature="O",oeligature="o",
+    IJligature="I",ijligature="i",
+    AE="A",ae="a",
+    OE="O",oe="o",
+    IJ="I",ij="i",
+    Ssharp="S",ssharp="s",
+  },
+  rightkerned=allocate {
+    AEligature="E",aeligature="e",
+    OEligature="E",oeligature="e",
+    IJligature="J",ijligature="j",
+    AE="E",ae="e",
+    OE="E",oe="e",
+    IJ="J",ij="j",
+    Ssharp="S",ssharp="s",
+  },
+  bothkerned=allocate {
+    Acircumflex="A",acircumflex="a",
+    Ccircumflex="C",ccircumflex="c",
+    Ecircumflex="E",ecircumflex="e",
+    Gcircumflex="G",gcircumflex="g",
+    Hcircumflex="H",hcircumflex="h",
+    Icircumflex="I",icircumflex="i",
+    Jcircumflex="J",jcircumflex="j",
+    Ocircumflex="O",ocircumflex="o",
+    Scircumflex="S",scircumflex="s",
+    Ucircumflex="U",ucircumflex="u",
+    Wcircumflex="W",wcircumflex="w",
+    Ycircumflex="Y",ycircumflex="y",
+    Agrave="A",agrave="a",
+    Egrave="E",egrave="e",
+    Igrave="I",igrave="i",
+    Ograve="O",ograve="o",
+    Ugrave="U",ugrave="u",
+    Ygrave="Y",ygrave="y",
+    Atilde="A",atilde="a",
+    Itilde="I",itilde="i",
+    Otilde="O",otilde="o",
+    Utilde="U",utilde="u",
+    Ntilde="N",ntilde="n",
+    Adiaeresis="A",adiaeresis="a",Adieresis="A",adieresis="a",
+    Ediaeresis="E",ediaeresis="e",Edieresis="E",edieresis="e",
+    Idiaeresis="I",idiaeresis="i",Idieresis="I",idieresis="i",
+    Odiaeresis="O",odiaeresis="o",Odieresis="O",odieresis="o",
+    Udiaeresis="U",udiaeresis="u",Udieresis="U",udieresis="u",
+    Ydiaeresis="Y",ydiaeresis="y",Ydieresis="Y",ydieresis="y",
+    Aacute="A",aacute="a",
+    Cacute="C",cacute="c",
+    Eacute="E",eacute="e",
+    Iacute="I",iacute="i",
+    Lacute="L",lacute="l",
+    Nacute="N",nacute="n",
+    Oacute="O",oacute="o",
+    Racute="R",racute="r",
+    Sacute="S",sacute="s",
+    Uacute="U",uacute="u",
+    Yacute="Y",yacute="y",
+    Zacute="Z",zacute="z",
+    Dstroke="D",dstroke="d",
+    Hstroke="H",hstroke="h",
+    Tstroke="T",tstroke="t",
+    Cdotaccent="C",cdotaccent="c",
+    Edotaccent="E",edotaccent="e",
+    Gdotaccent="G",gdotaccent="g",
+    Idotaccent="I",idotaccent="i",
+    Zdotaccent="Z",zdotaccent="z",
+    Amacron="A",amacron="a",
+    Emacron="E",emacron="e",
+    Imacron="I",imacron="i",
+    Omacron="O",omacron="o",
+    Umacron="U",umacron="u",
+    Ccedilla="C",ccedilla="c",
+    Kcedilla="K",kcedilla="k",
+    Lcedilla="L",lcedilla="l",
+    Ncedilla="N",ncedilla="n",
+    Rcedilla="R",rcedilla="r",
+    Scedilla="S",scedilla="s",
+    Tcedilla="T",tcedilla="t",
+    Ohungarumlaut="O",ohungarumlaut="o",
+    Uhungarumlaut="U",uhungarumlaut="u",
+    Aogonek="A",aogonek="a",
+    Eogonek="E",eogonek="e",
+    Iogonek="I",iogonek="i",
+    Uogonek="U",uogonek="u",
+    Aring="A",aring="a",
+    Uring="U",uring="u",
+    Abreve="A",abreve="a",
+    Ebreve="E",ebreve="e",
+    Gbreve="G",gbreve="g",
+    Ibreve="I",ibreve="i",
+    Obreve="O",obreve="o",
+    Ubreve="U",ubreve="u",
+    Ccaron="C",ccaron="c",
+    Dcaron="D",dcaron="d",
+    Ecaron="E",ecaron="e",
+    Lcaron="L",lcaron="l",
+    Ncaron="N",ncaron="n",
+    Rcaron="R",rcaron="r",
+    Scaron="S",scaron="s",
+    Tcaron="T",tcaron="t",
+    Zcaron="Z",zcaron="z",
+    dotlessI="I",dotlessi="i",
+    dotlessJ="J",dotlessj="j",
+    AEligature="AE",aeligature="ae",AE="AE",ae="ae",
+    OEligature="OE",oeligature="oe",OE="OE",oe="oe",
+    IJligature="IJ",ijligature="ij",IJ="IJ",ij="ij",
+    Lstroke="L",lstroke="l",Lslash="L",lslash="l",
+    Ostroke="O",ostroke="o",Oslash="O",oslash="o",
+    Ssharp="SS",ssharp="ss",
+    Aumlaut="A",aumlaut="a",
+    Eumlaut="E",eumlaut="e",
+    Iumlaut="I",iumlaut="i",
+    Oumlaut="O",oumlaut="o",
+    Uumlaut="U",uumlaut="u",
+  }
+}
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-tfm']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local next,type=next,type
+local match,format=string.match,string.format
+local concat,sortedhash=table.concat,table.sortedhash
+local trace_defining=false trackers.register("fonts.defining",function(v) trace_defining=v end)
+local trace_features=false trackers.register("tfm.features",function(v) trace_features=v end)
+local report_defining=logs.reporter("fonts","defining")
+local report_tfm=logs.reporter("fonts","tfm loading")
+local findbinfile=resolvers.findbinfile
+local setmetatableindex=table.setmetatableindex
+local fonts=fonts
+local handlers=fonts.handlers
+local readers=fonts.readers
+local constructors=fonts.constructors
+local encodings=fonts.encodings
+local tfm=constructors.handlers.tfm
+tfm.version=1.000
+tfm.maxnestingdepth=5
+tfm.maxnestingsize=65536*1024
+local otf=fonts.handlers.otf
+local otfenhancers=otf.enhancers
+local tfmfeatures=constructors.features.tfm
+local registertfmfeature=tfmfeatures.register
+local tfmenhancers=constructors.enhancers.tfm
+local registertfmenhancer=tfmenhancers.register
+constructors.resolvevirtualtoo=false 
+fonts.formats.tfm="type1" 
+fonts.formats.ofm="type1"
+function tfm.setfeatures(tfmdata,features)
+  local okay=constructors.initializefeatures("tfm",tfmdata,features,trace_features,report_tfm)
+  if okay then
+    return constructors.collectprocessors("tfm",tfmdata,features,trace_features,report_tfm)
+  else
+    return {} 
+  end
+end
+local depth={}
+local function read_from_tfm(specification)
+  local filename=specification.filename
+  local size=specification.size
+  depth[filename]=(depth[filename] or 0)+1
+  if trace_defining then
+    report_defining("loading tfm file %a at size %s",filename,size)
+  end
+  local tfmdata=font.read_tfm(filename,size) 
+  if tfmdata then
+    local features=specification.features and specification.features.normal or {}
+    local features=constructors.checkedfeatures("tfm",features)
+    specification.features.normal=features
+    local newtfmdata=(depth[filename]==1) and tfm.reencode(tfmdata,specification)
+    if newtfmdata then
+       tfmdata=newtfmdata
+    end
+    local resources=tfmdata.resources or {}
+    local properties=tfmdata.properties or {}
+    local parameters=tfmdata.parameters or {}
+    local shared=tfmdata.shared   or {}
+    shared.features=features
+    shared.resources=resources
+    properties.name=tfmdata.name      
+    properties.fontname=tfmdata.fontname    
+    properties.psname=tfmdata.psname     
+    properties.fullname=tfmdata.fullname    
+    properties.filename=specification.filename 
+    properties.format=fonts.formats.tfm
+    tfmdata.properties=properties
+    tfmdata.resources=resources
+    tfmdata.parameters=parameters
+    tfmdata.shared=shared
+    shared.rawdata={ resources=resources }
+    shared.features=features
+    if newtfmdata then
+      if not resources.marks then
+        resources.marks={}
+      end
+      if not resources.sequences then
+        resources.sequences={}
+      end
+      if not resources.features then
+        resources.features={
+          gsub={},
+          gpos={},
+        }
+      end
+      if not tfmdata.changed then
+        tfmdata.changed={}
+      end
+      if not tfmdata.descriptions then
+        tfmdata.descriptions=tfmdata.characters
+      end
+      otf.readers.addunicodetable(tfmdata)
+      tfmenhancers.apply(tfmdata,filename)
+      constructors.applymanipulators("tfm",tfmdata,features,trace_features,report_tfm)
+      otf.readers.unifymissing(tfmdata)
+      fonts.mappings.addtounicode(tfmdata,filename)
+      tfmdata.tounicode=1
+      local tounicode=fonts.mappings.tounicode
+      for unicode,v in next,tfmdata.characters do
+        local u=v.unicode
+        if u then
+          v.tounicode=tounicode(u)
+        end
+      end
+      if tfmdata.usedbitmap then
+        tfm.addtounicode(tfmdata)
+      end
+    end
+    shared.processes=next(features) and tfm.setfeatures(tfmdata,features) or nil
+    parameters.factor=1 
+    parameters.size=size
+    parameters.slant=parameters.slant     or parameters[1] or 0
+    parameters.space=parameters.space     or parameters[2] or 0
+    parameters.space_stretch=parameters.space_stretch or parameters[3] or 0
+    parameters.space_shrink=parameters.space_shrink  or parameters[4] or 0
+    parameters.x_height=parameters.x_height    or parameters[5] or 0
+    parameters.quad=parameters.quad      or parameters[6] or 0
+    parameters.extra_space=parameters.extra_space  or parameters[7] or 0
+    constructors.enhanceparameters(parameters)
+    properties.private=properties.private or tfmdata.private or privateoffset
+    if newtfmdata then
+    elseif constructors.resolvevirtualtoo then
+      fonts.loggers.register(tfmdata,file.suffix(filename),specification) 
+      local vfname=findbinfile(specification.name,'ovf')
+      if vfname and vfname~="" then
+        local vfdata=font.read_vf(vfname,size) 
+        if vfdata then
+          local chars=tfmdata.characters
+          for k,v in next,vfdata.characters do
+            chars[k].commands=v.commands
+          end
+          properties.virtualized=true
+          tfmdata.fonts=vfdata.fonts
+          tfmdata.type="virtual" 
+          local fontlist=vfdata.fonts
+          local name=file.nameonly(filename)
+          for i=1,#fontlist do
+            local n=fontlist[i].name
+            local s=fontlist[i].size
+            local d=depth[filename]
+            s=constructors.scaled(s,vfdata.designsize)
+            if d>tfm.maxnestingdepth then
+              report_defining("too deeply nested virtual font %a with size %a, max nesting depth %s",n,s,tfm.maxnestingdepth)
+              fontlist[i]={ id=0 }
+            elseif (d>1) and (s>tfm.maxnestingsize) then
+              report_defining("virtual font %a exceeds size %s",n,s)
+              fontlist[i]={ id=0 }
+            else
+              local t,id=fonts.constructors.readanddefine(n,s)
+              fontlist[i]={ id=id }
+            end
+          end
+        end
+      end
+    end
+    properties.haskerns=true
+    properties.hasligatures=true
+    resources.unicodes={}
+    resources.lookuptags={}
+    depth[filename]=depth[filename]-1
+    return tfmdata
+  else
+    depth[filename]=depth[filename]-1
+  end
+end
+local function check_tfm(specification,fullname) 
+  local foundname=findbinfile(fullname,'tfm') or ""
+  if foundname=="" then
+    foundname=findbinfile(fullname,'ofm') or "" 
+  end
+  if foundname=="" then
+    foundname=fonts.names.getfilename(fullname,"tfm") or ""
+  end
+  if foundname~="" then
+    specification.filename=foundname
+    specification.format="ofm"
+    return read_from_tfm(specification)
+  elseif trace_defining then
+    report_defining("loading tfm with name %a fails",specification.name)
+  end
+end
+readers.check_tfm=check_tfm
+function readers.tfm(specification)
+  local fullname=specification.filename or ""
+  if fullname=="" then
+    local forced=specification.forced or ""
+    if forced~="" then
+      fullname=specification.name.."."..forced
+    else
+      fullname=specification.name
+    end
+  end
+  return check_tfm(specification,fullname)
+end
+readers.ofm=readers.tfm
+do
+  local outfiles={}
+  local tfmcache=table.setmetatableindex(function(t,tfmdata)
+    local id=font.define(tfmdata)
+    t[tfmdata]=id
+    return id
+  end)
+  local encdone=table.setmetatableindex("table")
+  function tfm.reencode(tfmdata,specification)
+    local features=specification.features
+    if not features then
+      return
+    end
+    local features=features.normal
+    if not features then
+      return
+    end
+    local tfmfile=file.basename(tfmdata.name)
+    local encfile=features.reencode 
+    local pfbfile=features.pfbfile 
+    local bitmap=features.bitmap  
+    if not encfile then
+      return
+    end
+    local pfbfile=outfiles[tfmfile]
+    if pfbfile==nil then
+      if bitmap then
+        pfbfile=false
+      elseif type(pfbfile)~="string" then
+        pfbfile=tfmfile
+      end
+      if type(pfbfile)=="string" then
+        pfbfile=file.addsuffix(pfbfile,"pfb")
+        report_tfm("using type1 shapes from %a for %a",pfbfile,tfmfile)
+      else
+        report_tfm("using bitmap shapes for %a",tfmfile)
+        pfbfile=false 
+      end
+      outfiles[tfmfile]=pfbfile
+    end
+    local encoding=false
+    local vector=false
+    if type(pfbfile)=="string" then
+      local pfb=fonts.constructors.handlers.pfb
+      if pfb and pfb.loadvector then
+        local v,e=pfb.loadvector(pfbfile)
+        if v then
+          vector=v
+        end
+        if e then
+          encoding=e
+        end
+      end
+    end
+    if type(encfile)=="string" and encfile~="auto" then
+      encoding=fonts.encodings.load(file.addsuffix(encfile,"enc"))
+      if encoding then
+        encoding=encoding.vector
+      end
+    end
+    if not encoding then
+      report_tfm("bad encoding for %a, quitting",tfmfile)
+      return
+    end
+    local unicoding=fonts.encodings.agl and fonts.encodings.agl.unicodes
+    local virtualid=tfmcache[tfmdata]
+    local tfmdata=table.copy(tfmdata) 
+    local characters={}
+    local originals=tfmdata.characters
+    local indices={}
+    local parentfont={ "font",1 }
+    local private=tfmdata or fonts.constructors.privateoffset
+    local reported=encdone[tfmfile][encfile]
+    local backmap=vector and table.swapped(vector)
+    local done={} 
+    for index,name in sortedhash(encoding) do 
+      local unicode=unicoding[name]
+      local original=originals[index]
+      if original then
+        if unicode then
+          original.unicode=unicode
+        else
+          unicode=private
+          private=private+1
+          if not reported then
+            report_tfm("glyph %a in font %a with encoding %a gets unicode %U",name,tfmfile,encfile,unicode)
+          end
+        end
+        characters[unicode]=original
+        indices[index]=unicode
+        original.name=name 
+        if backmap then
+          original.index=backmap[name]
+        else 
+          original.commands={ parentfont,{ "char",index } }
+          original.oindex=index
+        end
+        done[name]=true
+      elseif not done[name] then
+        report_tfm("bad index %a in font %a with name %a",index,tfmfile,name)
+      end
+    end
+    encdone[tfmfile][encfile]=true
+    for k,v in next,characters do
+      local kerns=v.kerns
+      if kerns then
+        local t={}
+        for k,v in next,kerns do
+          local i=indices[k]
+          if i then
+            t[i]=v
+          end
+        end
+        v.kerns=next(t) and t or nil
+      end
+      local ligatures=v.ligatures
+      if ligatures then
+        local t={}
+        for k,v in next,ligatures do
+          local i=indices[k]
+          if i then
+            t[i]=v
+            v.char=indices[v.char]
+          end
+        end
+        v.ligatures=next(t) and t or nil
+      end
+    end
+    tfmdata.fonts={ { id=virtualid } }
+    tfmdata.characters=characters
+    tfmdata.fullname=tfmdata.fullname or tfmdata.name
+    tfmdata.psname=file.nameonly(pfbfile or tfmdata.name)
+    tfmdata.filename=pfbfile
+    tfmdata.encodingbytes=2
+    tfmdata.format="type1"
+    tfmdata.tounicode=1
+    tfmdata.embedding="subset"
+    tfmdata.usedbitmap=bitmap and virtualid
+    tfmdata.private=private
+    return tfmdata
+  end
+end
+do
+  local template=[[
+/CIDInit /ProcSet findresource begin
+  12 dict begin
+  begincmap
+    /CIDSystemInfo << /Registry (TeX) /Ordering (bitmap-%s) /Supplement 0 >> def
+    /CMapName /TeX-bitmap-%s def
+    /CMapType 2 def
+    1 begincodespacerange
+      <00> <FF>
+    endcodespacerange
+    %s beginbfchar
+%s
+    endbfchar
+  endcmap
+CMapName currentdict /CMap defineresource pop end
+end
+end
+]]
+  local flushstreamobject=lpdf and lpdf.flushstreamobject
+  local setfontattributes=pdf.setfontattributes
+  if not flushstreamobject then
+    flushstreamobject=function(data)
+      return pdf.obj {
+        immediate=true,
+        type="stream",
+        string=data,
+      }
+    end
+  end
+  if not setfontattributes then
+    setfontattributes=function(id,data)
+      print(format("your luatex is too old so no tounicode bitmap font%i",id))
+    end
+  end
+  function tfm.addtounicode(tfmdata)
+    local id=tfmdata.usedbitmap
+    local map={}
+    local char={} 
+    for k,v in next,tfmdata.characters do
+      local index=v.oindex
+      local tounicode=v.tounicode
+      if index and tounicode then
+        map[index]=tounicode
+      end
+    end
+    for k,v in sortedhash(map) do
+      char[#char+1]=format("<%02X> <%s>",k,v)
+    end
+    char=concat(char,"\n")
+    local stream=format(template,id,id,#char,char)
+    local reference=flushstreamobject(stream,nil,true)
+    setfontattributes(id,format("/ToUnicode %i 0 R",reference))
+  end
+end
+do
+  local everywhere={ ["*"]={ ["*"]=true } } 
+  local noflags={ false,false,false,false }
+  local function enhance_normalize_features(data)
+    local ligatures=setmetatableindex("table")
+    local kerns=setmetatableindex("table")
+    local characters=data.characters
+    for u,c in next,characters do
+      local l=c.ligatures
+      local k=c.kerns
+      if l then
+        ligatures[u]=l
+        for u,v in next,l do
+          l[u]={ ligature=v.char }
+        end
+        c.ligatures=nil
+      end
+      if k then
+        kerns[u]=k
+        for u,v in next,k do
+          k[u]=v 
+        end
+        c.kerns=nil
+      end
+    end
+    for u,l in next,ligatures do
+      for k,v in next,l do
+        local vl=v.ligature
+        local dl=ligatures[vl]
+        if dl then
+          for kk,vv in next,dl do
+            v[kk]=vv 
+          end
+        end
+      end
+    end
+    local features={
+      gpos={},
+      gsub={},
+    }
+    local sequences={
+    }
+    if next(ligatures) then
+      features.gsub.liga=everywhere
+      data.properties.hasligatures=true
+      sequences[#sequences+1]={
+        features={
+          liga=everywhere,
+        },
+        flags=noflags,
+        name="s_s_0",
+        nofsteps=1,
+        order={ "liga" },
+        type="gsub_ligature",
+        steps={
+          {
+            coverage=ligatures,
+          },
+        },
+      }
+    end
+    if next(kerns) then
+      features.gpos.kern=everywhere
+      data.properties.haskerns=true
+      sequences[#sequences+1]={
+        features={
+          kern=everywhere,
+        },
+        flags=noflags,
+        name="p_s_0",
+        nofsteps=1,
+        order={ "kern" },
+        type="gpos_pair",
+        steps={
+          {
+            format="kern",
+            coverage=kerns,
+          },
+        },
+      }
+    end
+    data.resources.features=features
+    data.resources.sequences=sequences
+    data.shared.resources=data.shared.resources or resources
+  end
+  registertfmenhancer("normalize features",enhance_normalize_features)
+  registertfmenhancer("check extra features",otfenhancers.enhance)
+end
+registertfmfeature {
+  name="mode",
+  description="mode",
+  initializers={
+    base=otf.modeinitializer,
+    node=otf.modeinitializer,
+  }
+}
+registertfmfeature {
+  name="features",
+  description="features",
+  default=true,
+  initializers={
+    base=otf.basemodeinitializer,
+    node=otf.nodemodeinitializer,
+  },
+  processors={
+    node=otf.featuresprocessor,
+  }
+}
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-lua']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local trace_defining=false trackers.register("fonts.defining",function(v) trace_defining=v end)
+local report_lua=logs.reporter("fonts","lua loading")
+local fonts=fonts
+local readers=fonts.readers
+fonts.formats.lua="lua"
+local function check_lua(specification,fullname)
+  local fullname=resolvers.findfile(fullname) or ""
+  if fullname~="" then
+    local loader=loadfile(fullname)
+    loader=loader and loader()
+    return loader and loader(specification)
+  end
+end
+readers.check_lua=check_lua
+function readers.lua(specification)
+  local original=specification.specification
+  if trace_defining then
+    report_lua("using lua reader for %a",original)
+  end
+  local fullname=specification.filename or ""
+  if fullname=="" then
+    local forced=specification.forced or ""
+    if forced~="" then
+      fullname=specification.name.."."..forced
+    else
+      fullname=specification.name
+    end
+  end
+  return check_lua(specification,fullname)
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-def']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local lower,gsub=string.lower,string.gsub
+local tostring,next=tostring,next
+local lpegmatch=lpeg.match
+local suffixonly,removesuffix,basename=file.suffix,file.removesuffix,file.basename
+local formatters=string.formatters
+local sortedhash,sortedkeys=table.sortedhash,table.sortedkeys
+local allocate=utilities.storage.allocate
+local trace_defining=false trackers .register("fonts.defining",function(v) trace_defining=v end)
+local directive_embedall=false directives.register("fonts.embedall",function(v) directive_embedall=v end)
+trackers.register("fonts.loading","fonts.defining","otf.loading","afm.loading","tfm.loading")
+local report_defining=logs.reporter("fonts","defining")
+local fonts=fonts
+local fontdata=fonts.hashes.identifiers
+local readers=fonts.readers
+local definers=fonts.definers
+local specifiers=fonts.specifiers
+local constructors=fonts.constructors
+local fontgoodies=fonts.goodies
+readers.sequence=allocate { 'otf','ttf','afm','tfm','lua' } 
+local variants=allocate()
+specifiers.variants=variants
+definers.methods=definers.methods or {}
+local internalized=allocate() 
+local lastdefined=nil 
+local loadedfonts=constructors.loadedfonts
+local designsizes=constructors.designsizes
+local resolvefile=fontgoodies and fontgoodies.filenames and fontgoodies.filenames.resolve or function(s) return s end
+local splitter,splitspecifiers=nil,"" 
+local P,C,S,Cc=lpeg.P,lpeg.C,lpeg.S,lpeg.Cc
+local left=P("(")
+local right=P(")")
+local colon=P(":")
+local space=P(" ")
+definers.defaultlookup="file"
+local prefixpattern=P(false)
+local function addspecifier(symbol)
+  splitspecifiers=splitspecifiers..symbol
+  local method=S(splitspecifiers)
+  local lookup=C(prefixpattern)*colon
+  local sub=left*C(P(1-left-right-method)^1)*right
+  local specification=C(method)*C(P(1)^1)
+  local name=C((1-sub-specification)^1)
+  splitter=P((lookup+Cc(""))*name*(sub+Cc(""))*(specification+Cc("")))
+end
+local function addlookup(str,default)
+  prefixpattern=prefixpattern+P(str)
+end
+definers.addlookup=addlookup
+addlookup("file")
+addlookup("name")
+addlookup("spec")
+local function getspecification(str)
+  return lpegmatch(splitter,str or "") 
+end
+definers.getspecification=getspecification
+function definers.registersplit(symbol,action,verbosename)
+  addspecifier(symbol)
+  variants[symbol]=action
+  if verbosename then
+    variants[verbosename]=action
+  end
+end
+local function makespecification(specification,lookup,name,sub,method,detail,size)
+  size=size or 655360
+  if not lookup or lookup=="" then
+    lookup=definers.defaultlookup
+  end
+  if trace_defining then
+    report_defining("specification %a, lookup %a, name %a, sub %a, method %a, detail %a",
+      specification,lookup,name,sub,method,detail)
+  end
+  local t={
+    lookup=lookup,
+    specification=specification,
+    size=size,
+    name=name,
+    sub=sub,
+    method=method,
+    detail=detail,
+    resolved="",
+    forced="",
+    features={},
+  }
+  return t
+end
+definers.makespecification=makespecification
+function definers.analyze(specification,size)
+  local lookup,name,sub,method,detail=getspecification(specification or "")
+  return makespecification(specification,lookup,name,sub,method,detail,size)
+end
+definers.resolvers=definers.resolvers or {}
+local resolvers=definers.resolvers
+function resolvers.file(specification)
+  local name=resolvefile(specification.name) 
+  local suffix=lower(suffixonly(name))
+  if fonts.formats[suffix] then
+    specification.forced=suffix
+    specification.forcedname=name
+    specification.name=removesuffix(name)
+  else
+    specification.name=name 
+  end
+end
+function resolvers.name(specification)
+  local resolve=fonts.names.resolve
+  if resolve then
+    local resolved,sub,subindex,instance=resolve(specification.name,specification.sub,specification) 
+    if resolved then
+      specification.resolved=resolved
+      specification.sub=sub
+      specification.subindex=subindex
+      if instance then
+        specification.instance=instance
+        local features=specification.features
+        if not features then
+          features={}
+          specification.features=features
+        end
+        local normal=features.normal
+        if not normal then
+          normal={}
+          features.normal=normal
+        end
+        normal.instance=instance
+        if not callbacks.supported.glyph_stream_provider then
+          normal.variableshapes=true 
+        end
+      end
+      local suffix=lower(suffixonly(resolved))
+      if fonts.formats[suffix] then
+        specification.forced=suffix
+        specification.forcedname=resolved
+        specification.name=removesuffix(resolved)
+      else
+        specification.name=resolved
+      end
+    end
+  else
+    resolvers.file(specification)
+  end
+end
+function resolvers.spec(specification)
+  local resolvespec=fonts.names.resolvespec
+  if resolvespec then
+    local resolved,sub,subindex=resolvespec(specification.name,specification.sub,specification) 
+    if resolved then
+      specification.resolved=resolved
+      specification.sub=sub
+      specification.subindex=subindex
+      specification.forced=lower(suffixonly(resolved))
+      specification.forcedname=resolved
+      specification.name=removesuffix(resolved)
+    end
+  else
+    resolvers.name(specification)
+  end
+end
+function definers.resolve(specification)
+  if not specification.resolved or specification.resolved=="" then 
+    local r=resolvers[specification.lookup]
+    if r then
+      r(specification)
+    end
+  end
+  if specification.forced=="" then
+    specification.forced=nil
+    specification.forcedname=nil
+  end
+  specification.hash=lower(specification.name..' @ '..constructors.hashfeatures(specification))
+  if specification.sub and specification.sub~="" then
+    specification.hash=specification.sub..' @ '..specification.hash
+  end
+  return specification
+end
+function definers.applypostprocessors(tfmdata)
+  local postprocessors=tfmdata.postprocessors
+  if postprocessors then
+    local properties=tfmdata.properties
+    for i=1,#postprocessors do
+      local extrahash=postprocessors[i](tfmdata) 
+      if type(extrahash)=="string" and extrahash~="" then
+        extrahash=gsub(lower(extrahash),"[^a-z]","-")
+        properties.fullname=formatters["%s-%s"](properties.fullname,extrahash)
+      end
+    end
+  end
+  return tfmdata
+end
+local function checkembedding(tfmdata)
+  local properties=tfmdata.properties
+  local embedding
+  if directive_embedall then
+    embedding="full"
+  elseif properties and properties.filename and constructors.dontembed[properties.filename] then
+    embedding="no"
+  else
+    embedding="subset"
+  end
+  if properties then
+    properties.embedding=embedding
+  else
+    tfmdata.properties={ embedding=embedding }
+  end
+  tfmdata.embedding=embedding
+end
+local function checkfeatures(tfmdata)
+  local resources=tfmdata.resources
+  local shared=tfmdata.shared
+  if resources and shared then
+    local features=resources.features
+    local usedfeatures=shared.features
+    if features and usedfeatures then
+      local usedlanguage=usedfeatures.language or "dflt"
+      local usedscript=usedfeatures.script or "dflt"
+      local function check(what)
+        if what then
+          local foundlanguages={}
+          for feature,scripts in next,what do
+            if usedscript=="auto" or scripts["*"] then
+            elseif not scripts[usedscript] then
+            else
+              for script,languages in next,scripts do
+                if languages["*"] then
+                elseif not languages[usedlanguage] then
+                  report_defining("font %!font:name!, feature %a, script %a, no language %a",
+                    tfmdata,feature,script,usedlanguage)
+                end
+              end
+            end
+            for script,languages in next,scripts do
+              for language in next,languages do
+                foundlanguages[language]=true
+              end
+            end
+          end
+          if false then
+            foundlanguages["*"]=nil
+            foundlanguages=sortedkeys(foundlanguages)
+            for feature,scripts in sortedhash(what) do
+              for script,languages in next,scripts do
+                if not languages["*"] then
+                  for i=1,#foundlanguages do
+                    local language=foundlanguages[i]
+                    if not languages[language] then
+                      report_defining("font %!font:name!, feature %a, script %a, no language %a",
+                        tfmdata,feature,script,language)
+                    end
+                  end
+                end
+              end
+            end
+          end
+        end
+      end
+      check(features.gsub)
+      check(features.gpos)
+    end
+  end
+end
+function definers.loadfont(specification)
+  local hash=constructors.hashinstance(specification)
+  local tfmdata=loadedfonts[hash] 
+  if not tfmdata then
+    local forced=specification.forced or ""
+    if forced~="" then
+      local reader=readers[lower(forced)] 
+      tfmdata=reader and reader(specification)
+      if not tfmdata then
+        report_defining("forced type %a of %a not found",forced,specification.name)
+      end
+    else
+      local sequence=readers.sequence 
+      for s=1,#sequence do
+        local reader=sequence[s]
+        if readers[reader] then 
+          if trace_defining then
+            report_defining("trying (reader sequence driven) type %a for %a with file %a",reader,specification.name,specification.filename)
+          end
+          tfmdata=readers[reader](specification)
+          if tfmdata then
+            break
+          else
+            specification.filename=nil
+          end
+        end
+      end
+    end
+    if tfmdata then
+      tfmdata=definers.applypostprocessors(tfmdata)
+      checkembedding(tfmdata) 
+      loadedfonts[hash]=tfmdata
+      designsizes[specification.hash]=tfmdata.parameters.designsize
+      checkfeatures(tfmdata)
+    end
+  end
+  if not tfmdata then
+    report_defining("font with asked name %a is not found using lookup %a",specification.name,specification.lookup)
+  end
+  return tfmdata
+end
+function constructors.readanddefine(name,size) 
+  local specification=definers.analyze(name,size)
+  local method=specification.method
+  if method and variants[method] then
+    specification=variants[method](specification)
+  end
+  specification=definers.resolve(specification)
+  local hash=constructors.hashinstance(specification)
+  local id=definers.registered(hash)
+  if not id then
+    local tfmdata=definers.loadfont(specification)
+    if tfmdata then
+      tfmdata.properties.hash=hash
+      id=font.define(tfmdata)
+      definers.register(tfmdata,id)
+    else
+      id=0 
+    end
+  end
+  return fontdata[id],id
+end
+function definers.current() 
+  return lastdefined
+end
+function definers.registered(hash)
+  local id=internalized[hash]
+  return id,id and fontdata[id]
+end
+function definers.register(tfmdata,id)
+  if tfmdata and id then
+    local hash=tfmdata.properties.hash
+    if not hash then
+      report_defining("registering font, id %a, name %a, invalid hash",id,tfmdata.properties.filename or "?")
+    elseif not internalized[hash] then
+      internalized[hash]=id
+      if trace_defining then
+        report_defining("registering font, id %s, hash %a",id,hash)
+      end
+      fontdata[id]=tfmdata
+    end
+  end
+end
+function definers.read(specification,size,id) 
+  statistics.starttiming(fonts)
+  if type(specification)=="string" then
+    specification=definers.analyze(specification,size)
+  end
+  local method=specification.method
+  if method and variants[method] then
+    specification=variants[method](specification)
+  end
+  specification=definers.resolve(specification)
+  local hash=constructors.hashinstance(specification)
+  local tfmdata=definers.registered(hash) 
+  if tfmdata then
+    if trace_defining then
+      report_defining("already hashed: %s",hash)
+    end
+  else
+    tfmdata=definers.loadfont(specification) 
+    if tfmdata then
+      if trace_defining then
+        report_defining("loaded and hashed: %s",hash)
+      end
+      tfmdata.properties.hash=hash
+      if id then
+        definers.register(tfmdata,id)
+      end
+    else
+      if trace_defining then
+        report_defining("not loaded and hashed: %s",hash)
+      end
+    end
+  end
+  lastdefined=tfmdata or id 
+  if not tfmdata then 
+    report_defining("unknown font %a, loading aborted",specification.name)
+  elseif trace_defining and type(tfmdata)=="table" then
+    local properties=tfmdata.properties or {}
+    local parameters=tfmdata.parameters or {}
+    report_defining("using %a font with id %a, name %a, size %a, bytes %a, encoding %a, fullname %a, filename %a",
+      properties.format or "unknown",id,properties.name,parameters.size,properties.encodingbytes,
+      properties.encodingname,properties.fullname,basename(properties.filename))
+  end
+  statistics.stoptiming(fonts)
+  return tfmdata
+end
+function font.getfont(id)
+  return fontdata[id] 
+end
+callbacks.register('define_font',definers.read,"definition of fonts (tfmdata preparation)")
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['luatex-fonts-def']={
+  version=1.001,
+  comment="companion to luatex-*.tex",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+if context then
+  texio.write_nl("fatal error: this module is not for context")
+  os.exit()
+end
+local fonts=fonts
+fonts.constructors.namemode="specification"
+function fonts.definers.getspecification(str)
+  return "",str,"",":",str
+end
+local list={}
+local function issome ()  list.lookup='name'     end 
+local function isfile ()  list.lookup='file'     end
+local function isname ()  list.lookup='name'     end
+local function thename(s)  list.name=s        end
+local function issub (v)  list.sub=v        end
+local function iscrap (s)  list.crap=string.lower(s) end
+local function iskey (k,v) list[k]=v        end
+local function istrue (s)  list[s]=true      end
+local function isfalse(s)  list[s]=false      end
+local P,S,R,C=lpeg.P,lpeg.S,lpeg.R,lpeg.C
+local spaces=P(" ")^0
+local namespec=(1-S("/:("))^0 
+local crapspec=spaces*P("/")*(((1-P(":"))^0)/iscrap)*spaces
+local filename_1=P("file:")/isfile*(namespec/thename)
+local filename_2=P("[")*P(true)/isname*(((1-P("]"))^0)/thename)*P("]")
+local fontname_1=P("name:")/isname*(namespec/thename)
+local fontname_2=P(true)/issome*(namespec/thename)
+local sometext=(R("az","AZ","09")+S("+-.{}"))^1
+local truevalue=P("+")*spaces*(sometext/istrue)
+local falsevalue=P("-")*spaces*(sometext/isfalse)
+local keyvalue=(C(sometext)*spaces*P("=")*spaces*C(sometext))/iskey
+local somevalue=sometext/istrue
+local subvalue=P("(")*(C(P(1-S("()"))^1)/issub)*P(")") 
+local option=spaces*(keyvalue+falsevalue+truevalue+somevalue)*spaces
+local options=P(":")*spaces*(P(";")^0*option)^0
+local pattern=(filename_1+filename_2+fontname_1+fontname_2)*subvalue^0*crapspec^0*options^0
+local function colonized(specification) 
+  list={}
+  lpeg.match(pattern,specification.specification)
+  list.crap=nil 
+  if list.name then
+    specification.name=list.name
+    list.name=nil
+  end
+  if list.lookup then
+    specification.lookup=list.lookup
+    list.lookup=nil
+  end
+  if list.sub then
+    specification.sub=list.sub
+    list.sub=nil
+  end
+  specification.features.normal=fonts.handlers.otf.features.normalize(list)
+  return specification
+end
+fonts.definers.registersplit(":",colonized,"cryptic")
+fonts.definers.registersplit("",colonized,"more cryptic") 
+function fonts.definers.applypostprocessors(tfmdata)
+  local postprocessors=tfmdata.postprocessors
+  if postprocessors then
+    for i=1,#postprocessors do
+      local extrahash=postprocessors[i](tfmdata) 
+      if type(extrahash)=="string" and extrahash~="" then
+        extrahash=string.gsub(lower(extrahash),"[^a-z]","-")
+        tfmdata.properties.fullname=format("%s-%s",tfmdata.properties.fullname,extrahash)
+      end
+    end
+  end
+  return tfmdata
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['luatex-fonts-ext']={
+  version=1.001,
+  comment="companion to luatex-*.tex",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+if context then
+  texio.write_nl("fatal error: this module is not for context")
+  os.exit()
+end
+local fonts=fonts
+local otffeatures=fonts.constructors.features.otf
+local getprivate=fonts.constructors.getprivate
+local function initializeitlc(tfmdata,value)
+  if value then
+    local parameters=tfmdata.parameters
+    local italicangle=parameters.italicangle
+    if italicangle and italicangle~=0 then
+      local properties=tfmdata.properties
+      local factor=tonumber(value) or 1
+      properties.hasitalics=true
+      properties.autoitalicamount=factor*(parameters.uwidth or 40)/2
+    end
+  end
+end
+otffeatures.register {
+  name="itlc",
+  description="italic correction",
+  initializers={
+    base=initializeitlc,
+    node=initializeitlc,
+  }
+}
+local function initializeslant(tfmdata,value)
+  value=tonumber(value)
+  if not value then
+    value=0
+  elseif value>1 then
+    value=1
+  elseif value<-1 then
+    value=-1
+  end
+  tfmdata.parameters.slantfactor=value
+end
+otffeatures.register {
+  name="slant",
+  description="slant glyphs",
+  initializers={
+    base=initializeslant,
+    node=initializeslant,
+  }
+}
+local function initializeextend(tfmdata,value)
+  value=tonumber(value)
+  if not value then
+    value=0
+  elseif value>10 then
+    value=10
+  elseif value<-10 then
+    value=-10
+  end
+  tfmdata.parameters.extendfactor=value
+end
+otffeatures.register {
+  name="extend",
+  description="scale glyphs horizontally",
+  initializers={
+    base=initializeextend,
+    node=initializeextend,
+  }
+}
+fonts.protrusions=fonts.protrusions    or {}
+fonts.protrusions.setups=fonts.protrusions.setups or {}
+local setups=fonts.protrusions.setups
+local function initializeprotrusion(tfmdata,value)
+  if value then
+    local setup=setups[value]
+    if setup then
+      local factor,left,right=setup.factor or 1,setup.left or 1,setup.right or 1
+      local emwidth=tfmdata.parameters.quad
+      tfmdata.parameters.protrusion={
+        auto=true,
+      }
+      for i,chr in next,tfmdata.characters do
+        local v,pl,pr=setup[i],nil,nil
+        if v then
+          pl,pr=v[1],v[2]
+        end
+        if pl and pl~=0 then chr.left_protruding=left*pl*factor end
+        if pr and pr~=0 then chr.right_protruding=right*pr*factor end
+      end
+    end
+  end
+end
+otffeatures.register {
+  name="protrusion",
+  description="shift characters into the left and or right margin",
+  initializers={
+    base=initializeprotrusion,
+    node=initializeprotrusion,
+  }
+}
+fonts.expansions=fonts.expansions    or {}
+fonts.expansions.setups=fonts.expansions.setups or {}
+local setups=fonts.expansions.setups
+local function initializeexpansion(tfmdata,value)
+  if value then
+    local setup=setups[value]
+    if setup then
+      local factor=setup.factor or 1
+      tfmdata.parameters.expansion={
+        stretch=10*(setup.stretch or 0),
+        shrink=10*(setup.shrink or 0),
+        step=10*(setup.step  or 0),
+        auto=true,
+      }
+      for i,chr in next,tfmdata.characters do
+        local v=setup[i]
+        if v and v~=0 then
+          chr.expansion_factor=v*factor
+        else 
+          chr.expansion_factor=factor
+        end
+      end
+    end
+  end
+end
+otffeatures.register {
+  name="expansion",
+  description="apply hz optimization",
+  initializers={
+    base=initializeexpansion,
+    node=initializeexpansion,
+  }
+}
+function fonts.loggers.onetimemessage() end
+local byte=string.byte
+fonts.expansions.setups['default']={
+  stretch=2,shrink=2,step=.5,factor=1,
+  [byte('A')]=0.5,[byte('B')]=0.7,[byte('C')]=0.7,[byte('D')]=0.5,[byte('E')]=0.7,
+  [byte('F')]=0.7,[byte('G')]=0.5,[byte('H')]=0.7,[byte('K')]=0.7,[byte('M')]=0.7,
+  [byte('N')]=0.7,[byte('O')]=0.5,[byte('P')]=0.7,[byte('Q')]=0.5,[byte('R')]=0.7,
+  [byte('S')]=0.7,[byte('U')]=0.7,[byte('W')]=0.7,[byte('Z')]=0.7,
+  [byte('a')]=0.7,[byte('b')]=0.7,[byte('c')]=0.7,[byte('d')]=0.7,[byte('e')]=0.7,
+  [byte('g')]=0.7,[byte('h')]=0.7,[byte('k')]=0.7,[byte('m')]=0.7,[byte('n')]=0.7,
+  [byte('o')]=0.7,[byte('p')]=0.7,[byte('q')]=0.7,[byte('s')]=0.7,[byte('u')]=0.7,
+  [byte('w')]=0.7,[byte('z')]=0.7,
+  [byte('2')]=0.7,[byte('3')]=0.7,[byte('6')]=0.7,[byte('8')]=0.7,[byte('9')]=0.7,
+}
+fonts.protrusions.setups['default']={
+  factor=1,left=1,right=1,
+  [0x002C]={ 0,1  },
+  [0x002E]={ 0,1  },
+  [0x003A]={ 0,1  },
+  [0x003B]={ 0,1  },
+  [0x002D]={ 0,1  },
+  [0x2013]={ 0,0.50 },
+  [0x2014]={ 0,0.33 },
+  [0x3001]={ 0,1  },
+  [0x3002]={ 0,1  },
+  [0x060C]={ 0,1  },
+  [0x061B]={ 0,1  },
+  [0x06D4]={ 0,1  },
+}
+fonts.handlers.otf.features.normalize=function(t)
+  if t.rand then
+    t.rand="random"
+  end
+  return t
+end
+function fonts.helpers.nametoslot(name)
+  local t=type(name)
+  if t=="string" then
+    local tfmdata=fonts.hashes.identifiers[currentfont()]
+    local shared=tfmdata and tfmdata.shared
+    local fntdata=shared and shared.rawdata
+    return fntdata and fntdata.resources.unicodes[name]
+  elseif t=="number" then
+    return n
+  end
+end
+fonts.encodings=fonts.encodings or {}
+local reencodings={}
+fonts.encodings.reencodings=reencodings
+local function specialreencode(tfmdata,value)
+  local encoding=value and reencodings[value]
+  if encoding then
+    local temp={}
+    local char=tfmdata.characters
+    for k,v in next,encoding do
+      temp[k]=char[v]
+    end
+    for k,v in next,temp do
+      char[k]=temp[k]
+    end
+    return string.format("reencoded:%s",value)
+  end
+end
+local function reencode(tfmdata,value)
+  tfmdata.postprocessors=tfmdata.postprocessors or {}
+  table.insert(tfmdata.postprocessors,
+    function(tfmdata)
+      return specialreencode(tfmdata,value)
+    end
+  )
+end
+otffeatures.register {
+  name="reencode",
+  description="reencode characters",
+  manipulators={
+    base=reencode,
+    node=reencode,
+  }
+}
+local function ignore(tfmdata,key,value)
+  if value then
+    tfmdata.mathparameters=nil
+  end
+end
+otffeatures.register {
+  name="ignoremathconstants",
+  description="ignore math constants table",
+  initializers={
+    base=ignore,
+    node=ignore,
+  }
+}
+local setmetatableindex=table.setmetatableindex
+local function additalictowidth(tfmdata,key,value)
+  local characters=tfmdata.characters
+  local additions={}
+  for unicode,old_c in next,characters do
+    local oldwidth=old_c.width
+    local olditalic=old_c.italic
+    if olditalic and olditalic~=0 then
+      local private=getprivate(tfmdata)
+      local new_c={
+        width=oldwidth+olditalic,
+        height=old_c.height,
+        depth=old_c.depth,
+        commands={
+          { "slot",1,private },
+          { "right",olditalic },
+        },
+      }
+      setmetatableindex(new_c,old_c)
+      characters[unicode]=new_c
+      additions[private]=old_c
+    end
+  end
+  for k,v in next,additions do
+    characters[k]=v
+  end
+end
+otffeatures.register {
+  name="italicwidths",
+  description="add italic to width",
+  manipulators={
+    base=additalictowidth,
+  }
+}
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+
+fonts.handlers.otf.addfeature {
+ ["dataset"]={
+ {
+  ["data"]={
+  ["À"]={ "A","̀" },
+  ["Á"]={ "A","́" },
+  ["Â"]={ "A","̂" },
+  ["Ã"]={ "A","̃" },
+  ["Ä"]={ "A","̈" },
+  ["Å"]={ "A","̊" },
+  ["Ç"]={ "C","̧" },
+  ["È"]={ "E","̀" },
+  ["É"]={ "E","́" },
+  ["Ê"]={ "E","̂" },
+  ["Ë"]={ "E","̈" },
+  ["Ì"]={ "I","̀" },
+  ["Í"]={ "I","́" },
+  ["Î"]={ "I","̂" },
+  ["Ï"]={ "I","̈" },
+  ["Ñ"]={ "N","̃" },
+  ["Ò"]={ "O","̀" },
+  ["Ó"]={ "O","́" },
+  ["Ô"]={ "O","̂" },
+  ["Õ"]={ "O","̃" },
+  ["Ö"]={ "O","̈" },
+  ["Ù"]={ "U","̀" },
+  ["Ú"]={ "U","́" },
+  ["Û"]={ "U","̂" },
+  ["Ü"]={ "U","̈" },
+  ["Ý"]={ "Y","́" },
+  ["à"]={ "a","̀" },
+  ["á"]={ "a","́" },
+  ["â"]={ "a","̂" },
+  ["ã"]={ "a","̃" },
+  ["ä"]={ "a","̈" },
+  ["å"]={ "a","̊" },
+  ["ç"]={ "c","̧" },
+  ["è"]={ "e","̀" },
+  ["é"]={ "e","́" },
+  ["ê"]={ "e","̂" },
+  ["ë"]={ "e","̈" },
+  ["ì"]={ "i","̀" },
+  ["í"]={ "i","́" },
+  ["î"]={ "i","̂" },
+  ["ï"]={ "i","̈" },
+  ["ñ"]={ "n","̃" },
+  ["ò"]={ "o","̀" },
+  ["ó"]={ "o","́" },
+  ["ô"]={ "o","̂" },
+  ["õ"]={ "o","̃" },
+  ["ö"]={ "o","̈" },
+  ["ù"]={ "u","̀" },
+  ["ú"]={ "u","́" },
+  ["û"]={ "u","̂" },
+  ["ü"]={ "u","̈" },
+  ["ý"]={ "y","́" },
+  ["ÿ"]={ "y","̈" },
+  ["Ā"]={ "A","̄" },
+  ["ā"]={ "a","̄" },
+  ["Ă"]={ "A","̆" },
+  ["ă"]={ "a","̆" },
+  ["Ą"]={ "A","̨" },
+  ["ą"]={ "a","̨" },
+  ["Ć"]={ "C","́" },
+  ["ć"]={ "c","́" },
+  ["Ĉ"]={ "C","̂" },
+  ["ĉ"]={ "c","̂" },
+  ["Ċ"]={ "C","̇" },
+  ["ċ"]={ "c","̇" },
+  ["Č"]={ "C","̌" },
+  ["č"]={ "c","̌" },
+  ["Ď"]={ "D","̌" },
+  ["ď"]={ "d","̌" },
+  ["Ē"]={ "E","̄" },
+  ["ē"]={ "e","̄" },
+  ["Ĕ"]={ "E","̆" },
+  ["ĕ"]={ "e","̆" },
+  ["Ė"]={ "E","̇" },
+  ["ė"]={ "e","̇" },
+  ["Ę"]={ "E","̨" },
+  ["ę"]={ "e","̨" },
+  ["Ě"]={ "E","̌" },
+  ["ě"]={ "e","̌" },
+  ["Ĝ"]={ "G","̂" },
+  ["ĝ"]={ "g","̂" },
+  ["Ğ"]={ "G","̆" },
+  ["ğ"]={ "g","̆" },
+  ["Ġ"]={ "G","̇" },
+  ["ġ"]={ "g","̇" },
+  ["Ģ"]={ "G","̧" },
+  ["ģ"]={ "g","̧" },
+  ["Ĥ"]={ "H","̂" },
+  ["ĥ"]={ "h","̂" },
+  ["Ĩ"]={ "I","̃" },
+  ["ĩ"]={ "i","̃" },
+  ["Ī"]={ "I","̄" },
+  ["ī"]={ "i","̄" },
+  ["Ĭ"]={ "I","̆" },
+  ["ĭ"]={ "i","̆" },
+  ["Į"]={ "I","̨" },
+  ["į"]={ "i","̨" },
+  ["İ"]={ "I","̇" },
+  ["Ĵ"]={ "J","̂" },
+  ["ĵ"]={ "j","̂" },
+  ["Ķ"]={ "K","̧" },
+  ["ķ"]={ "k","̧" },
+  ["Ĺ"]={ "L","́" },
+  ["ĺ"]={ "l","́" },
+  ["Ļ"]={ "L","̧" },
+  ["ļ"]={ "l","̧" },
+  ["Ľ"]={ "L","̌" },
+  ["ľ"]={ "l","̌" },
+  ["Ń"]={ "N","́" },
+  ["ń"]={ "n","́" },
+  ["Ņ"]={ "N","̧" },
+  ["ņ"]={ "n","̧" },
+  ["Ň"]={ "N","̌" },
+  ["ň"]={ "n","̌" },
+  ["Ō"]={ "O","̄" },
+  ["ō"]={ "o","̄" },
+  ["Ŏ"]={ "O","̆" },
+  ["ŏ"]={ "o","̆" },
+  ["Ő"]={ "O","̋" },
+  ["ő"]={ "o","̋" },
+  ["Ŕ"]={ "R","́" },
+  ["ŕ"]={ "r","́" },
+  ["Ŗ"]={ "R","̧" },
+  ["ŗ"]={ "r","̧" },
+  ["Ř"]={ "R","̌" },
+  ["ř"]={ "r","̌" },
+  ["Ś"]={ "S","́" },
+  ["ś"]={ "s","́" },
+  ["Ŝ"]={ "S","̂" },
+  ["ŝ"]={ "s","̂" },
+  ["Ş"]={ "S","̧" },
+  ["ş"]={ "s","̧" },
+  ["Š"]={ "S","̌" },
+  ["š"]={ "s","̌" },
+  ["Ţ"]={ "T","̧" },
+  ["ţ"]={ "t","̧" },
+  ["Ť"]={ "T","̌" },
+  ["ť"]={ "t","̌" },
+  ["Ũ"]={ "U","̃" },
+  ["ũ"]={ "u","̃" },
+  ["Ū"]={ "U","̄" },
+  ["ū"]={ "u","̄" },
+  ["Ŭ"]={ "U","̆" },
+  ["ŭ"]={ "u","̆" },
+  ["Ů"]={ "U","̊" },
+  ["ů"]={ "u","̊" },
+  ["Ű"]={ "U","̋" },
+  ["ű"]={ "u","̋" },
+  ["Ų"]={ "U","̨" },
+  ["ų"]={ "u","̨" },
+  ["Ŵ"]={ "W","̂" },
+  ["ŵ"]={ "w","̂" },
+  ["Ŷ"]={ "Y","̂" },
+  ["ŷ"]={ "y","̂" },
+  ["Ÿ"]={ "Y","̈" },
+  ["Ź"]={ "Z","́" },
+  ["ź"]={ "z","́" },
+  ["Ż"]={ "Z","̇" },
+  ["ż"]={ "z","̇" },
+  ["Ž"]={ "Z","̌" },
+  ["ž"]={ "z","̌" },
+  ["Ơ"]={ "O","̛" },
+  ["ơ"]={ "o","̛" },
+  ["Ư"]={ "U","̛" },
+  ["ư"]={ "u","̛" },
+  ["Ǎ"]={ "A","̌" },
+  ["ǎ"]={ "a","̌" },
+  ["Ǐ"]={ "I","̌" },
+  ["ǐ"]={ "i","̌" },
+  ["Ǒ"]={ "O","̌" },
+  ["ǒ"]={ "o","̌" },
+  ["Ǔ"]={ "U","̌" },
+  ["ǔ"]={ "u","̌" },
+  ["Ǖ"]={ "Ü","̄" },
+  ["ǖ"]={ "ü","̄" },
+  ["Ǘ"]={ "Ü","́" },
+  ["ǘ"]={ "ü","́" },
+  ["Ǚ"]={ "Ü","̌" },
+  ["ǚ"]={ "ü","̌" },
+  ["Ǜ"]={ "Ü","̀" },
+  ["ǜ"]={ "ü","̀" },
+  ["Ǟ"]={ "Ä","̄" },
+  ["ǟ"]={ "ä","̄" },
+  ["Ǡ"]={ "Ȧ","̄" },
+  ["ǡ"]={ "ȧ","̄" },
+  ["Ǣ"]={ "Æ","̄" },
+  ["ǣ"]={ "æ","̄" },
+  ["Ǧ"]={ "G","̌" },
+  ["ǧ"]={ "g","̌" },
+  ["Ǩ"]={ "K","̌" },
+  ["ǩ"]={ "k","̌" },
+  ["Ǫ"]={ "O","̨" },
+  ["ǫ"]={ "o","̨" },
+  ["Ǭ"]={ "Ǫ","̄" },
+  ["ǭ"]={ "ǫ","̄" },
+  ["Ǯ"]={ "Ʒ","̌" },
+  ["ǯ"]={ "ʒ","̌" },
+  ["ǰ"]={ "j","̌" },
+  ["Ǵ"]={ "G","́" },
+  ["ǵ"]={ "g","́" },
+  ["Ǹ"]={ "N","̀" },
+  ["ǹ"]={ "n","̀" },
+  ["Ǻ"]={ "Å","́" },
+  ["ǻ"]={ "å","́" },
+  ["Ǽ"]={ "Æ","́" },
+  ["ǽ"]={ "æ","́" },
+  ["Ǿ"]={ "Ø","́" },
+  ["ǿ"]={ "ø","́" },
+  ["Ȁ"]={ "A","̏" },
+  ["ȁ"]={ "a","̏" },
+  ["Ȃ"]={ "A","̑" },
+  ["ȃ"]={ "a","̑" },
+  ["Ȅ"]={ "E","̏" },
+  ["ȅ"]={ "e","̏" },
+  ["Ȇ"]={ "E","̑" },
+  ["ȇ"]={ "e","̑" },
+  ["Ȉ"]={ "I","̏" },
+  ["ȉ"]={ "i","̏" },
+  ["Ȋ"]={ "I","̑" },
+  ["ȋ"]={ "i","̑" },
+  ["Ȍ"]={ "O","̏" },
+  ["ȍ"]={ "o","̏" },
+  ["Ȏ"]={ "O","̑" },
+  ["ȏ"]={ "o","̑" },
+  ["Ȑ"]={ "R","̏" },
+  ["ȑ"]={ "r","̏" },
+  ["Ȓ"]={ "R","̑" },
+  ["ȓ"]={ "r","̑" },
+  ["Ȕ"]={ "U","̏" },
+  ["ȕ"]={ "u","̏" },
+  ["Ȗ"]={ "U","̑" },
+  ["ȗ"]={ "u","̑" },
+  ["Ș"]={ "S","̦" },
+  ["ș"]={ "s","̦" },
+  ["Ț"]={ "T","̦" },
+  ["ț"]={ "t","̦" },
+  ["Ȟ"]={ "H","̌" },
+  ["ȟ"]={ "h","̌" },
+  ["Ȧ"]={ "A","̇" },
+  ["ȧ"]={ "a","̇" },
+  ["Ȩ"]={ "E","̧" },
+  ["ȩ"]={ "e","̧" },
+  ["Ȫ"]={ "Ö","̄" },
+  ["ȫ"]={ "ö","̄" },
+  ["Ȭ"]={ "Õ","̄" },
+  ["ȭ"]={ "õ","̄" },
+  ["Ȯ"]={ "O","̇" },
+  ["ȯ"]={ "o","̇" },
+  ["Ȱ"]={ "Ȯ","̄" },
+  ["ȱ"]={ "ȯ","̄" },
+  ["Ȳ"]={ "Y","̄" },
+  ["ȳ"]={ "y","̄" },
+  ["̈́"]={ "̈","́" },
+  ["΅"]={ "¨","́" },
+  ["Ά"]={ "Α","́" },
+  ["Έ"]={ "Ε","́" },
+  ["Ή"]={ "Η","́" },
+  ["Ί"]={ "Ι","́" },
+  ["Ό"]={ "Ο","́" },
+  ["Ύ"]={ "Υ","́" },
+  ["Ώ"]={ "Ω","́" },
+  ["ΐ"]={ "ϊ","́" },
+  ["Ϊ"]={ "Ι","̈" },
+  ["Ϋ"]={ "Υ","̈" },
+  ["ά"]={ "α","́" },
+  ["έ"]={ "ε","́" },
+  ["ή"]={ "η","́" },
+  ["ί"]={ "ι","́" },
+  ["ΰ"]={ "ϋ","́" },
+  ["ϊ"]={ "ι","̈" },
+  ["ϋ"]={ "υ","̈" },
+  ["ό"]={ "ο","́" },
+  ["ύ"]={ "υ","́" },
+  ["ώ"]={ "ω","́" },
+  ["ϓ"]={ "ϒ","́" },
+  ["ϔ"]={ "ϒ","̈" },
+  ["Ѐ"]={ "Е","̀" },
+  ["Ё"]={ "Е","̈" },
+  ["Ѓ"]={ "Г","́" },
+  ["Ї"]={ "І","̈" },
+  ["Ќ"]={ "К","́" },
+  ["Ѝ"]={ "И","̀" },
+  ["Ў"]={ "У","̆" },
+  ["Й"]={ "И","̆" },
+  ["й"]={ "и","̆" },
+  ["ѐ"]={ "е","̀" },
+  ["ё"]={ "е","̈" },
+  ["ѓ"]={ "г","́" },
+  ["ї"]={ "і","̈" },
+  ["ќ"]={ "к","́" },
+  ["ѝ"]={ "и","̀" },
+  ["ў"]={ "у","̆" },
+  ["Ѷ"]={ "Ѵ","̏" },
+  ["ѷ"]={ "ѵ","̏" },
+  ["Ӂ"]={ "Ж","̆" },
+  ["ӂ"]={ "ж","̆" },
+  ["Ӑ"]={ "А","̆" },
+  ["ӑ"]={ "а","̆" },
+  ["Ӓ"]={ "А","̈" },
+  ["ӓ"]={ "а","̈" },
+  ["Ӗ"]={ "Е","̆" },
+  ["ӗ"]={ "е","̆" },
+  ["Ӛ"]={ "Ә","̈" },
+  ["ӛ"]={ "ә","̈" },
+  ["Ӝ"]={ "Ж","̈" },
+  ["ӝ"]={ "ж","̈" },
+  ["Ӟ"]={ "З","̈" },
+  ["ӟ"]={ "з","̈" },
+  ["Ӣ"]={ "И","̄" },
+  ["ӣ"]={ "и","̄" },
+  ["Ӥ"]={ "И","̈" },
+  ["ӥ"]={ "и","̈" },
+  ["Ӧ"]={ "О","̈" },
+  ["ӧ"]={ "о","̈" },
+  ["Ӫ"]={ "Ө","̈" },
+  ["ӫ"]={ "ө","̈" },
+  ["Ӭ"]={ "Э","̈" },
+  ["ӭ"]={ "э","̈" },
+  ["Ӯ"]={ "У","̄" },
+  ["ӯ"]={ "у","̄" },
+  ["Ӱ"]={ "У","̈" },
+  ["ӱ"]={ "у","̈" },
+  ["Ӳ"]={ "У","̋" },
+  ["ӳ"]={ "у","̋" },
+  ["Ӵ"]={ "Ч","̈" },
+  ["ӵ"]={ "ч","̈" },
+  ["Ӹ"]={ "Ы","̈" },
+  ["ӹ"]={ "ы","̈" },
+  ["آ"]={ "ا","ٓ" },
+  ["أ"]={ "ا","ٔ" },
+  ["ؤ"]={ "و","ٔ" },
+  ["إ"]={ "ا","ٕ" },
+  ["ئ"]={ "ي","ٔ" },
+  ["ۀ"]={ "ە","ٔ" },
+  ["ۂ"]={ "ہ","ٔ" },
+  ["ۓ"]={ "ے","ٔ" },
+  ["ऩ"]={ "न","़" },
+  ["ऱ"]={ "र","़" },
+  ["ऴ"]={ "ळ","़" },
+  ["क़"]={ "क","़" },
+  ["ख़"]={ "ख","़" },
+  ["ग़"]={ "ग","़" },
+  ["ज़"]={ "ज","़" },
+  ["ड़"]={ "ड","़" },
+  ["ढ़"]={ "ढ","़" },
+  ["फ़"]={ "फ","़" },
+  ["य़"]={ "य","़" },
+  ["ো"]={ "ে","া" },
+  ["ৌ"]={ "ে","ৗ" },
+  ["ড়"]={ "ড","়" },
+  ["ঢ়"]={ "ঢ","়" },
+  ["য়"]={ "য","়" },
+  ["ਲ਼"]={ "ਲ","਼" },
+  ["ਸ਼"]={ "ਸ","਼" },
+  ["ਖ਼"]={ "ਖ","਼" },
+  ["ਗ਼"]={ "ਗ","਼" },
+  ["ਜ਼"]={ "ਜ","਼" },
+  ["ਫ਼"]={ "ਫ","਼" },
+  ["ୈ"]={ "େ","ୖ" },
+  ["ୋ"]={ "େ","ା" },
+  ["ୌ"]={ "େ","ୗ" },
+  ["ଡ଼"]={ "ଡ","଼" },
+  ["ଢ଼"]={ "ଢ","଼" },
+  ["ஔ"]={ "ஒ","ௗ" },
+  ["ொ"]={ "ெ","ா" },
+  ["ோ"]={ "ே","ா" },
+  ["ௌ"]={ "ெ","ௗ" },
+  ["ై"]={ "ె","ౖ" },
+  ["ೀ"]={ "ಿ","ೕ" },
+  ["ೇ"]={ "ೆ","ೕ" },
+  ["ೈ"]={ "ೆ","ೖ" },
+  ["ೊ"]={ "ೆ","ೂ" },
+  ["ೋ"]={ "ೊ","ೕ" },
+  ["ൊ"]={ "െ","ാ" },
+  ["ോ"]={ "േ","ാ" },
+  ["ൌ"]={ "െ","ൗ" },
+  ["ේ"]={ "ෙ","්" },
+  ["ො"]={ "ෙ","ා" },
+  ["ෝ"]={ "ො","්" },
+  ["ෞ"]={ "ෙ","ෟ" },
+  ["གྷ"]={ "ག","ྷ" },
+  ["ཌྷ"]={ "ཌ","ྷ" },
+  ["དྷ"]={ "ད","ྷ" },
+  ["བྷ"]={ "བ","ྷ" },
+  ["ཛྷ"]={ "ཛ","ྷ" },
+  ["ཀྵ"]={ "ཀ","ྵ" },
+  ["ཱི"]={ "ཱ","ི" },
+  ["ཱུ"]={ "ཱ","ུ" },
+  ["ྲྀ"]={ "ྲ","ྀ" },
+  ["ླྀ"]={ "ླ","ྀ" },
+  ["ཱྀ"]={ "ཱ","ྀ" },
+  ["ྒྷ"]={ "ྒ","ྷ" },
+  ["ྜྷ"]={ "ྜ","ྷ" },
+  ["ྡྷ"]={ "ྡ","ྷ" },
+  ["ྦྷ"]={ "ྦ","ྷ" },
+  ["ྫྷ"]={ "ྫ","ྷ" },
+  ["ྐྵ"]={ "ྐ","ྵ" },
+  ["ဦ"]={ "ဥ","ီ" },
+  ["ᬆ"]={ "ᬅ","ᬵ" },
+  ["ᬈ"]={ "ᬇ","ᬵ" },
+  ["ᬊ"]={ "ᬉ","ᬵ" },
+  ["ᬌ"]={ "ᬋ","ᬵ" },
+  ["ᬎ"]={ "ᬍ","ᬵ" },
+  ["ᬒ"]={ "ᬑ","ᬵ" },
+  ["ᬻ"]={ "ᬺ","ᬵ" },
+  ["ᬽ"]={ "ᬼ","ᬵ" },
+  ["ᭀ"]={ "ᬾ","ᬵ" },
+  ["ᭁ"]={ "ᬿ","ᬵ" },
+  ["ᭃ"]={ "ᭂ","ᬵ" },
+  ["Ḁ"]={ "A","̥" },
+  ["ḁ"]={ "a","̥" },
+  ["Ḃ"]={ "B","̇" },
+  ["ḃ"]={ "b","̇" },
+  ["Ḅ"]={ "B","̣" },
+  ["ḅ"]={ "b","̣" },
+  ["Ḇ"]={ "B","̱" },
+  ["ḇ"]={ "b","̱" },
+  ["Ḉ"]={ "Ç","́" },
+  ["ḉ"]={ "ç","́" },
+  ["Ḋ"]={ "D","̇" },
+  ["ḋ"]={ "d","̇" },
+  ["Ḍ"]={ "D","̣" },
+  ["ḍ"]={ "d","̣" },
+  ["Ḏ"]={ "D","̱" },
+  ["ḏ"]={ "d","̱" },
+  ["Ḑ"]={ "D","̧" },
+  ["ḑ"]={ "d","̧" },
+  ["Ḓ"]={ "D","̭" },
+  ["ḓ"]={ "d","̭" },
+  ["Ḕ"]={ "Ē","̀" },
+  ["ḕ"]={ "ē","̀" },
+  ["Ḗ"]={ "Ē","́" },
+  ["ḗ"]={ "ē","́" },
+  ["Ḙ"]={ "E","̭" },
+  ["ḙ"]={ "e","̭" },
+  ["Ḛ"]={ "E","̰" },
+  ["ḛ"]={ "e","̰" },
+  ["Ḝ"]={ "Ȩ","̆" },
+  ["ḝ"]={ "ȩ","̆" },
+  ["Ḟ"]={ "F","̇" },
+  ["ḟ"]={ "f","̇" },
+  ["Ḡ"]={ "G","̄" },
+  ["ḡ"]={ "g","̄" },
+  ["Ḣ"]={ "H","̇" },
+  ["ḣ"]={ "h","̇" },
+  ["Ḥ"]={ "H","̣" },
+  ["ḥ"]={ "h","̣" },
+  ["Ḧ"]={ "H","̈" },
+  ["ḧ"]={ "h","̈" },
+  ["Ḩ"]={ "H","̧" },
+  ["ḩ"]={ "h","̧" },
+  ["Ḫ"]={ "H","̮" },
+  ["ḫ"]={ "h","̮" },
+  ["Ḭ"]={ "I","̰" },
+  ["ḭ"]={ "i","̰" },
+  ["Ḯ"]={ "Ï","́" },
+  ["ḯ"]={ "ï","́" },
+  ["Ḱ"]={ "K","́" },
+  ["ḱ"]={ "k","́" },
+  ["Ḳ"]={ "K","̣" },
+  ["ḳ"]={ "k","̣" },
+  ["Ḵ"]={ "K","̱" },
+  ["ḵ"]={ "k","̱" },
+  ["Ḷ"]={ "L","̣" },
+  ["ḷ"]={ "l","̣" },
+  ["Ḹ"]={ "Ḷ","̄" },
+  ["ḹ"]={ "ḷ","̄" },
+  ["Ḻ"]={ "L","̱" },
+  ["ḻ"]={ "l","̱" },
+  ["Ḽ"]={ "L","̭" },
+  ["ḽ"]={ "l","̭" },
+  ["Ḿ"]={ "M","́" },
+  ["ḿ"]={ "m","́" },
+  ["Ṁ"]={ "M","̇" },
+  ["ṁ"]={ "m","̇" },
+  ["Ṃ"]={ "M","̣" },
+  ["ṃ"]={ "m","̣" },
+  ["Ṅ"]={ "N","̇" },
+  ["ṅ"]={ "n","̇" },
+  ["Ṇ"]={ "N","̣" },
+  ["ṇ"]={ "n","̣" },
+  ["Ṉ"]={ "N","̱" },
+  ["ṉ"]={ "n","̱" },
+  ["Ṋ"]={ "N","̭" },
+  ["ṋ"]={ "n","̭" },
+  ["Ṍ"]={ "Õ","́" },
+  ["ṍ"]={ "õ","́" },
+  ["Ṏ"]={ "Õ","̈" },
+  ["ṏ"]={ "õ","̈" },
+  ["Ṑ"]={ "Ō","̀" },
+  ["ṑ"]={ "ō","̀" },
+  ["Ṓ"]={ "Ō","́" },
+  ["ṓ"]={ "ō","́" },
+  ["Ṕ"]={ "P","́" },
+  ["ṕ"]={ "p","́" },
+  ["Ṗ"]={ "P","̇" },
+  ["ṗ"]={ "p","̇" },
+  ["Ṙ"]={ "R","̇" },
+  ["ṙ"]={ "r","̇" },
+  ["Ṛ"]={ "R","̣" },
+  ["ṛ"]={ "r","̣" },
+  ["Ṝ"]={ "Ṛ","̄" },
+  ["ṝ"]={ "ṛ","̄" },
+  ["Ṟ"]={ "R","̱" },
+  ["ṟ"]={ "r","̱" },
+  ["Ṡ"]={ "S","̇" },
+  ["ṡ"]={ "s","̇" },
+  ["Ṣ"]={ "S","̣" },
+  ["ṣ"]={ "s","̣" },
+  ["Ṥ"]={ "Ś","̇" },
+  ["ṥ"]={ "ś","̇" },
+  ["Ṧ"]={ "Š","̇" },
+  ["ṧ"]={ "š","̇" },
+  ["Ṩ"]={ "Ṣ","̇" },
+  ["ṩ"]={ "ṣ","̇" },
+  ["Ṫ"]={ "T","̇" },
+  ["ṫ"]={ "t","̇" },
+  ["Ṭ"]={ "T","̣" },
+  ["ṭ"]={ "t","̣" },
+  ["Ṯ"]={ "T","̱" },
+  ["ṯ"]={ "t","̱" },
+  ["Ṱ"]={ "T","̭" },
+  ["ṱ"]={ "t","̭" },
+  ["Ṳ"]={ "U","̤" },
+  ["ṳ"]={ "u","̤" },
+  ["Ṵ"]={ "U","̰" },
+  ["ṵ"]={ "u","̰" },
+  ["Ṷ"]={ "U","̭" },
+  ["ṷ"]={ "u","̭" },
+  ["Ṹ"]={ "Ũ","́" },
+  ["ṹ"]={ "ũ","́" },
+  ["Ṻ"]={ "Ū","̈" },
+  ["ṻ"]={ "ū","̈" },
+  ["Ṽ"]={ "V","̃" },
+  ["ṽ"]={ "v","̃" },
+  ["Ṿ"]={ "V","̣" },
+  ["ṿ"]={ "v","̣" },
+  ["Ẁ"]={ "W","̀" },
+  ["ẁ"]={ "w","̀" },
+  ["Ẃ"]={ "W","́" },
+  ["ẃ"]={ "w","́" },
+  ["Ẅ"]={ "W","̈" },
+  ["ẅ"]={ "w","̈" },
+  ["Ẇ"]={ "W","̇" },
+  ["ẇ"]={ "w","̇" },
+  ["Ẉ"]={ "W","̣" },
+  ["ẉ"]={ "w","̣" },
+  ["Ẋ"]={ "X","̇" },
+  ["ẋ"]={ "x","̇" },
+  ["Ẍ"]={ "X","̈" },
+  ["ẍ"]={ "x","̈" },
+  ["Ẏ"]={ "Y","̇" },
+  ["ẏ"]={ "y","̇" },
+  ["Ẑ"]={ "Z","̂" },
+  ["ẑ"]={ "z","̂" },
+  ["Ẓ"]={ "Z","̣" },
+  ["ẓ"]={ "z","̣" },
+  ["Ẕ"]={ "Z","̱" },
+  ["ẕ"]={ "z","̱" },
+  ["ẖ"]={ "h","̱" },
+  ["ẗ"]={ "t","̈" },
+  ["ẘ"]={ "w","̊" },
+  ["ẙ"]={ "y","̊" },
+  ["ẛ"]={ "ſ","̇" },
+  ["Ạ"]={ "A","̣" },
+  ["ạ"]={ "a","̣" },
+  ["Ả"]={ "A","̉" },
+  ["ả"]={ "a","̉" },
+  ["Ấ"]={ "Â","́" },
+  ["ấ"]={ "â","́" },
+  ["Ầ"]={ "Â","̀" },
+  ["ầ"]={ "â","̀" },
+  ["Ẩ"]={ "Â","̉" },
+  ["ẩ"]={ "â","̉" },
+  ["Ẫ"]={ "Â","̃" },
+  ["ẫ"]={ "â","̃" },
+  ["Ậ"]={ "Ạ","̂" },
+  ["ậ"]={ "ạ","̂" },
+  ["Ắ"]={ "Ă","́" },
+  ["ắ"]={ "ă","́" },
+  ["Ằ"]={ "Ă","̀" },
+  ["ằ"]={ "ă","̀" },
+  ["Ẳ"]={ "Ă","̉" },
+  ["ẳ"]={ "ă","̉" },
+  ["Ẵ"]={ "Ă","̃" },
+  ["ẵ"]={ "ă","̃" },
+  ["Ặ"]={ "Ạ","̆" },
+  ["ặ"]={ "ạ","̆" },
+  ["Ẹ"]={ "E","̣" },
+  ["ẹ"]={ "e","̣" },
+  ["Ẻ"]={ "E","̉" },
+  ["ẻ"]={ "e","̉" },
+  ["Ẽ"]={ "E","̃" },
+  ["ẽ"]={ "e","̃" },
+  ["Ế"]={ "Ê","́" },
+  ["ế"]={ "ê","́" },
+  ["Ề"]={ "Ê","̀" },
+  ["ề"]={ "ê","̀" },
+  ["Ể"]={ "Ê","̉" },
+  ["ể"]={ "ê","̉" },
+  ["Ễ"]={ "Ê","̃" },
+  ["ễ"]={ "ê","̃" },
+  ["Ệ"]={ "Ẹ","̂" },
+  ["ệ"]={ "ẹ","̂" },
+  ["Ỉ"]={ "I","̉" },
+  ["ỉ"]={ "i","̉" },
+  ["Ị"]={ "I","̣" },
+  ["ị"]={ "i","̣" },
+  ["Ọ"]={ "O","̣" },
+  ["ọ"]={ "o","̣" },
+  ["Ỏ"]={ "O","̉" },
+  ["ỏ"]={ "o","̉" },
+  ["Ố"]={ "Ô","́" },
+  ["ố"]={ "ô","́" },
+  ["Ồ"]={ "Ô","̀" },
+  ["ồ"]={ "ô","̀" },
+  ["Ổ"]={ "Ô","̉" },
+  ["ổ"]={ "ô","̉" },
+  ["Ỗ"]={ "Ô","̃" },
+  ["ỗ"]={ "ô","̃" },
+  ["Ộ"]={ "Ọ","̂" },
+  ["ộ"]={ "ọ","̂" },
+  ["Ớ"]={ "Ơ","́" },
+  ["ớ"]={ "ơ","́" },
+  ["Ờ"]={ "Ơ","̀" },
+  ["ờ"]={ "ơ","̀" },
+  ["Ở"]={ "Ơ","̉" },
+  ["ở"]={ "ơ","̉" },
+  ["Ỡ"]={ "Ơ","̃" },
+  ["ỡ"]={ "ơ","̃" },
+  ["Ợ"]={ "Ơ","̣" },
+  ["ợ"]={ "ơ","̣" },
+  ["Ụ"]={ "U","̣" },
+  ["ụ"]={ "u","̣" },
+  ["Ủ"]={ "U","̉" },
+  ["ủ"]={ "u","̉" },
+  ["Ứ"]={ "Ư","́" },
+  ["ứ"]={ "ư","́" },
+  ["Ừ"]={ "Ư","̀" },
+  ["ừ"]={ "ư","̀" },
+  ["Ử"]={ "Ư","̉" },
+  ["ử"]={ "ư","̉" },
+  ["Ữ"]={ "Ư","̃" },
+  ["ữ"]={ "ư","̃" },
+  ["Ự"]={ "Ư","̣" },
+  ["ự"]={ "ư","̣" },
+  ["Ỳ"]={ "Y","̀" },
+  ["ỳ"]={ "y","̀" },
+  ["Ỵ"]={ "Y","̣" },
+  ["ỵ"]={ "y","̣" },
+  ["Ỷ"]={ "Y","̉" },
+  ["ỷ"]={ "y","̉" },
+  ["Ỹ"]={ "Y","̃" },
+  ["ỹ"]={ "y","̃" },
+  ["ἀ"]={ "α","̓" },
+  ["ἁ"]={ "α","̔" },
+  ["ἂ"]={ "ἀ","̀" },
+  ["ἃ"]={ "ἁ","̀" },
+  ["ἄ"]={ "ἀ","́" },
+  ["ἅ"]={ "ἁ","́" },
+  ["ἆ"]={ "ἀ","͂" },
+  ["ἇ"]={ "ἁ","͂" },
+  ["Ἀ"]={ "Α","̓" },
+  ["Ἁ"]={ "Α","̔" },
+  ["Ἂ"]={ "Ἀ","̀" },
+  ["Ἃ"]={ "Ἁ","̀" },
+  ["Ἄ"]={ "Ἀ","́" },
+  ["Ἅ"]={ "Ἁ","́" },
+  ["Ἆ"]={ "Ἀ","͂" },
+  ["Ἇ"]={ "Ἁ","͂" },
+  ["ἐ"]={ "ε","̓" },
+  ["ἑ"]={ "ε","̔" },
+  ["ἒ"]={ "ἐ","̀" },
+  ["ἓ"]={ "ἑ","̀" },
+  ["ἔ"]={ "ἐ","́" },
+  ["ἕ"]={ "ἑ","́" },
+  ["Ἐ"]={ "Ε","̓" },
+  ["Ἑ"]={ "Ε","̔" },
+  ["Ἒ"]={ "Ἐ","̀" },
+  ["Ἓ"]={ "Ἑ","̀" },
+  ["Ἔ"]={ "Ἐ","́" },
+  ["Ἕ"]={ "Ἑ","́" },
+  ["ἠ"]={ "η","̓" },
+  ["ἡ"]={ "η","̔" },
+  ["ἢ"]={ "ἠ","̀" },
+  ["ἣ"]={ "ἡ","̀" },
+  ["ἤ"]={ "ἠ","́" },
+  ["ἥ"]={ "ἡ","́" },
+  ["ἦ"]={ "ἠ","͂" },
+  ["ἧ"]={ "ἡ","͂" },
+  ["Ἠ"]={ "Η","̓" },
+  ["Ἡ"]={ "Η","̔" },
+  ["Ἢ"]={ "Ἠ","̀" },
+  ["Ἣ"]={ "Ἡ","̀" },
+  ["Ἤ"]={ "Ἠ","́" },
+  ["Ἥ"]={ "Ἡ","́" },
+  ["Ἦ"]={ "Ἠ","͂" },
+  ["Ἧ"]={ "Ἡ","͂" },
+  ["ἰ"]={ "ι","̓" },
+  ["ἱ"]={ "ι","̔" },
+  ["ἲ"]={ "ἰ","̀" },
+  ["ἳ"]={ "ἱ","̀" },
+  ["ἴ"]={ "ἰ","́" },
+  ["ἵ"]={ "ἱ","́" },
+  ["ἶ"]={ "ἰ","͂" },
+  ["ἷ"]={ "ἱ","͂" },
+  ["Ἰ"]={ "Ι","̓" },
+  ["Ἱ"]={ "Ι","̔" },
+  ["Ἲ"]={ "Ἰ","̀" },
+  ["Ἳ"]={ "Ἱ","̀" },
+  ["Ἴ"]={ "Ἰ","́" },
+  ["Ἵ"]={ "Ἱ","́" },
+  ["Ἶ"]={ "Ἰ","͂" },
+  ["Ἷ"]={ "Ἱ","͂" },
+  ["ὀ"]={ "ο","̓" },
+  ["ὁ"]={ "ο","̔" },
+  ["ὂ"]={ "ὀ","̀" },
+  ["ὃ"]={ "ὁ","̀" },
+  ["ὄ"]={ "ὀ","́" },
+  ["ὅ"]={ "ὁ","́" },
+  ["Ὀ"]={ "Ο","̓" },
+  ["Ὁ"]={ "Ο","̔" },
+  ["Ὂ"]={ "Ὀ","̀" },
+  ["Ὃ"]={ "Ὁ","̀" },
+  ["Ὄ"]={ "Ὀ","́" },
+  ["Ὅ"]={ "Ὁ","́" },
+  ["ὐ"]={ "υ","̓" },
+  ["ὑ"]={ "υ","̔" },
+  ["ὒ"]={ "ὐ","̀" },
+  ["ὓ"]={ "ὑ","̀" },
+  ["ὔ"]={ "ὐ","́" },
+  ["ὕ"]={ "ὑ","́" },
+  ["ὖ"]={ "ὐ","͂" },
+  ["ὗ"]={ "ὑ","͂" },
+  ["Ὑ"]={ "Υ","̔" },
+  ["Ὓ"]={ "Ὑ","̀" },
+  ["Ὕ"]={ "Ὑ","́" },
+  ["Ὗ"]={ "Ὑ","͂" },
+  ["ὠ"]={ "ω","̓" },
+  ["ὡ"]={ "ω","̔" },
+  ["ὢ"]={ "ὠ","̀" },
+  ["ὣ"]={ "ὡ","̀" },
+  ["ὤ"]={ "ὠ","́" },
+  ["ὥ"]={ "ὡ","́" },
+  ["ὦ"]={ "ὠ","͂" },
+  ["ὧ"]={ "ὡ","͂" },
+  ["Ὠ"]={ "Ω","̓" },
+  ["Ὡ"]={ "Ω","̔" },
+  ["Ὢ"]={ "Ὠ","̀" },
+  ["Ὣ"]={ "Ὡ","̀" },
+  ["Ὤ"]={ "Ὠ","́" },
+  ["Ὥ"]={ "Ὡ","́" },
+  ["Ὦ"]={ "Ὠ","͂" },
+  ["Ὧ"]={ "Ὡ","͂" },
+  ["ὰ"]={ "α","̀" },
+  ["ὲ"]={ "ε","̀" },
+  ["ὴ"]={ "η","̀" },
+  ["ὶ"]={ "ι","̀" },
+  ["ὸ"]={ "ο","̀" },
+  ["ὺ"]={ "υ","̀" },
+  ["ὼ"]={ "ω","̀" },
+  ["ᾀ"]={ "ἀ","ͅ" },
+  ["ᾁ"]={ "ἁ","ͅ" },
+  ["ᾂ"]={ "ἂ","ͅ" },
+  ["ᾃ"]={ "ἃ","ͅ" },
+  ["ᾄ"]={ "ἄ","ͅ" },
+  ["ᾅ"]={ "ἅ","ͅ" },
+  ["ᾆ"]={ "ἆ","ͅ" },
+  ["ᾇ"]={ "ἇ","ͅ" },
+  ["ᾈ"]={ "Ἀ","ͅ" },
+  ["ᾉ"]={ "Ἁ","ͅ" },
+  ["ᾊ"]={ "Ἂ","ͅ" },
+  ["ᾋ"]={ "Ἃ","ͅ" },
+  ["ᾌ"]={ "Ἄ","ͅ" },
+  ["ᾍ"]={ "Ἅ","ͅ" },
+  ["ᾎ"]={ "Ἆ","ͅ" },
+  ["ᾏ"]={ "Ἇ","ͅ" },
+  ["ᾐ"]={ "ἠ","ͅ" },
+  ["ᾑ"]={ "ἡ","ͅ" },
+  ["ᾒ"]={ "ἢ","ͅ" },
+  ["ᾓ"]={ "ἣ","ͅ" },
+  ["ᾔ"]={ "ἤ","ͅ" },
+  ["ᾕ"]={ "ἥ","ͅ" },
+  ["ᾖ"]={ "ἦ","ͅ" },
+  ["ᾗ"]={ "ἧ","ͅ" },
+  ["ᾘ"]={ "Ἠ","ͅ" },
+  ["ᾙ"]={ "Ἡ","ͅ" },
+  ["ᾚ"]={ "Ἢ","ͅ" },
+  ["ᾛ"]={ "Ἣ","ͅ" },
+  ["ᾜ"]={ "Ἤ","ͅ" },
+  ["ᾝ"]={ "Ἥ","ͅ" },
+  ["ᾞ"]={ "Ἦ","ͅ" },
+  ["ᾟ"]={ "Ἧ","ͅ" },
+  ["ᾠ"]={ "ὠ","ͅ" },
+  ["ᾡ"]={ "ὡ","ͅ" },
+  ["ᾢ"]={ "ὢ","ͅ" },
+  ["ᾣ"]={ "ὣ","ͅ" },
+  ["ᾤ"]={ "ὤ","ͅ" },
+  ["ᾥ"]={ "ὥ","ͅ" },
+  ["ᾦ"]={ "ὦ","ͅ" },
+  ["ᾧ"]={ "ὧ","ͅ" },
+  ["ᾨ"]={ "Ὠ","ͅ" },
+  ["ᾩ"]={ "Ὡ","ͅ" },
+  ["ᾪ"]={ "Ὢ","ͅ" },
+  ["ᾫ"]={ "Ὣ","ͅ" },
+  ["ᾬ"]={ "Ὤ","ͅ" },
+  ["ᾭ"]={ "Ὥ","ͅ" },
+  ["ᾮ"]={ "Ὦ","ͅ" },
+  ["ᾯ"]={ "Ὧ","ͅ" },
+  ["ᾰ"]={ "α","̆" },
+  ["ᾱ"]={ "α","̄" },
+  ["ᾲ"]={ "ὰ","ͅ" },
+  ["ᾳ"]={ "α","ͅ" },
+  ["ᾴ"]={ "ά","ͅ" },
+  ["ᾶ"]={ "α","͂" },
+  ["ᾷ"]={ "ᾶ","ͅ" },
+  ["Ᾰ"]={ "Α","̆" },
+  ["Ᾱ"]={ "Α","̄" },
+  ["Ὰ"]={ "Α","̀" },
+  ["ᾼ"]={ "Α","ͅ" },
+  ["῁"]={ "¨","͂" },
+  ["ῂ"]={ "ὴ","ͅ" },
+  ["ῃ"]={ "η","ͅ" },
+  ["ῄ"]={ "ή","ͅ" },
+  ["ῆ"]={ "η","͂" },
+  ["ῇ"]={ "ῆ","ͅ" },
+  ["Ὲ"]={ "Ε","̀" },
+  ["Ὴ"]={ "Η","̀" },
+  ["ῌ"]={ "Η","ͅ" },
+  ["῍"]={ "᾿","̀" },
+  ["῎"]={ "᾿","́" },
+  ["῏"]={ "᾿","͂" },
+  ["ῐ"]={ "ι","̆" },
+  ["ῑ"]={ "ι","̄" },
+  ["ῒ"]={ "ϊ","̀" },
+  ["ῖ"]={ "ι","͂" },
+  ["ῗ"]={ "ϊ","͂" },
+  ["Ῐ"]={ "Ι","̆" },
+  ["Ῑ"]={ "Ι","̄" },
+  ["Ὶ"]={ "Ι","̀" },
+  ["῝"]={ "῾","̀" },
+  ["῞"]={ "῾","́" },
+  ["῟"]={ "῾","͂" },
+  ["ῠ"]={ "υ","̆" },
+  ["ῡ"]={ "υ","̄" },
+  ["ῢ"]={ "ϋ","̀" },
+  ["ῤ"]={ "ρ","̓" },
+  ["ῥ"]={ "ρ","̔" },
+  ["ῦ"]={ "υ","͂" },
+  ["ῧ"]={ "ϋ","͂" },
+  ["Ῠ"]={ "Υ","̆" },
+  ["Ῡ"]={ "Υ","̄" },
+  ["Ὺ"]={ "Υ","̀" },
+  ["Ῥ"]={ "Ρ","̔" },
+  ["῭"]={ "¨","̀" },
+  ["ῲ"]={ "ὼ","ͅ" },
+  ["ῳ"]={ "ω","ͅ" },
+  ["ῴ"]={ "ώ","ͅ" },
+  ["ῶ"]={ "ω","͂" },
+  ["ῷ"]={ "ῶ","ͅ" },
+  ["Ὸ"]={ "Ο","̀" },
+  ["Ὼ"]={ "Ω","̀" },
+  ["ῼ"]={ "Ω","ͅ" },
+  ["↚"]={ "←","̸" },
+  ["↛"]={ "→","̸" },
+  ["↮"]={ "↔","̸" },
+  ["⇍"]={ "⇐","̸" },
+  ["⇎"]={ "⇔","̸" },
+  ["⇏"]={ "⇒","̸" },
+  ["∄"]={ "∃","̸" },
+  ["∉"]={ "∈","̸" },
+  ["∌"]={ "∋","̸" },
+  ["∤"]={ "∣","̸" },
+  ["∦"]={ "∥","̸" },
+  ["≁"]={ "∼","̸" },
+  ["≄"]={ "≃","̸" },
+  ["≇"]={ "≅","̸" },
+  ["≉"]={ "≈","̸" },
+  ["≠"]={ "=","̸" },
+  ["≢"]={ "≡","̸" },
+  ["≭"]={ "≍","̸" },
+  ["≮"]={ "<","̸" },
+  ["≯"]={ ">","̸" },
+  ["≰"]={ "≤","̸" },
+  ["≱"]={ "≥","̸" },
+  ["≴"]={ "≲","̸" },
+  ["≵"]={ "≳","̸" },
+  ["≸"]={ "≶","̸" },
+  ["≹"]={ "≷","̸" },
+  ["⊀"]={ "≺","̸" },
+  ["⊁"]={ "≻","̸" },
+  ["⊄"]={ "⊂","̸" },
+  ["⊅"]={ "⊃","̸" },
+  ["⊈"]={ "⊆","̸" },
+  ["⊉"]={ "⊇","̸" },
+  ["⊬"]={ "⊢","̸" },
+  ["⊭"]={ "⊨","̸" },
+  ["⊮"]={ "⊩","̸" },
+  ["⊯"]={ "⊫","̸" },
+  ["⋠"]={ "≼","̸" },
+  ["⋡"]={ "≽","̸" },
+  ["⋢"]={ "⊑","̸" },
+  ["⋣"]={ "⊒","̸" },
+  ["⋪"]={ "⊲","̸" },
+  ["⋫"]={ "⊳","̸" },
+  ["⋬"]={ "⊴","̸" },
+  ["⋭"]={ "⊵","̸" },
+  ["⫝̸"]={ "⫝","̸" },
+  ["が"]={ "か","゙" },
+  ["ぎ"]={ "き","゙" },
+  ["ぐ"]={ "く","゙" },
+  ["げ"]={ "け","゙" },
+  ["ご"]={ "こ","゙" },
+  ["ざ"]={ "さ","゙" },
+  ["じ"]={ "し","゙" },
+  ["ず"]={ "す","゙" },
+  ["ぜ"]={ "せ","゙" },
+  ["ぞ"]={ "そ","゙" },
+  ["だ"]={ "た","゙" },
+  ["ぢ"]={ "ち","゙" },
+  ["づ"]={ "つ","゙" },
+  ["で"]={ "て","゙" },
+  ["ど"]={ "と","゙" },
+  ["ば"]={ "は","゙" },
+  ["ぱ"]={ "は","゚" },
+  ["び"]={ "ひ","゙" },
+  ["ぴ"]={ "ひ","゚" },
+  ["ぶ"]={ "ふ","゙" },
+  ["ぷ"]={ "ふ","゚" },
+  ["べ"]={ "へ","゙" },
+  ["ぺ"]={ "へ","゚" },
+  ["ぼ"]={ "ほ","゙" },
+  ["ぽ"]={ "ほ","゚" },
+  ["ゔ"]={ "う","゙" },
+  ["ゞ"]={ "ゝ","゙" },
+  ["ガ"]={ "カ","゙" },
+  ["ギ"]={ "キ","゙" },
+  ["グ"]={ "ク","゙" },
+  ["ゲ"]={ "ケ","゙" },
+  ["ゴ"]={ "コ","゙" },
+  ["ザ"]={ "サ","゙" },
+  ["ジ"]={ "シ","゙" },
+  ["ズ"]={ "ス","゙" },
+  ["ゼ"]={ "セ","゙" },
+  ["ゾ"]={ "ソ","゙" },
+  ["ダ"]={ "タ","゙" },
+  ["ヂ"]={ "チ","゙" },
+  ["ヅ"]={ "ツ","゙" },
+  ["デ"]={ "テ","゙" },
+  ["ド"]={ "ト","゙" },
+  ["バ"]={ "ハ","゙" },
+  ["パ"]={ "ハ","゚" },
+  ["ビ"]={ "ヒ","゙" },
+  ["ピ"]={ "ヒ","゚" },
+  ["ブ"]={ "フ","゙" },
+  ["プ"]={ "フ","゚" },
+  ["ベ"]={ "ヘ","゙" },
+  ["ペ"]={ "ヘ","゚" },
+  ["ボ"]={ "ホ","゙" },
+  ["ポ"]={ "ホ","゚" },
+  ["ヴ"]={ "ウ","゙" },
+  ["ヷ"]={ "ワ","゙" },
+  ["ヸ"]={ "ヰ","゙" },
+  ["ヹ"]={ "ヱ","゙" },
+  ["ヺ"]={ "ヲ","゙" },
+  ["ヾ"]={ "ヽ","゙" },
+  ["יִ"]={ "י","ִ" },
+  ["ײַ"]={ "ײ","ַ" },
+  ["שׁ"]={ "ש","ׁ" },
+  ["שׂ"]={ "ש","ׂ" },
+  ["שּׁ"]={ "שּ","ׁ" },
+  ["שּׂ"]={ "שּ","ׂ" },
+  ["אַ"]={ "א","ַ" },
+  ["אָ"]={ "א","ָ" },
+  ["אּ"]={ "א","ּ" },
+  ["בּ"]={ "ב","ּ" },
+  ["גּ"]={ "ג","ּ" },
+  ["דּ"]={ "ד","ּ" },
+  ["הּ"]={ "ה","ּ" },
+  ["וּ"]={ "ו","ּ" },
+  ["זּ"]={ "ז","ּ" },
+  ["טּ"]={ "ט","ּ" },
+  ["יּ"]={ "י","ּ" },
+  ["ךּ"]={ "ך","ּ" },
+  ["כּ"]={ "כ","ּ" },
+  ["לּ"]={ "ל","ּ" },
+  ["מּ"]={ "מ","ּ" },
+  ["נּ"]={ "נ","ּ" },
+  ["סּ"]={ "ס","ּ" },
+  ["ףּ"]={ "ף","ּ" },
+  ["פּ"]={ "פ","ּ" },
+  ["צּ"]={ "צ","ּ" },
+  ["קּ"]={ "ק","ּ" },
+  ["רּ"]={ "ר","ּ" },
+  ["שּ"]={ "ש","ּ" },
+  ["תּ"]={ "ת","ּ" },
+  ["וֹ"]={ "ו","ֹ" },
+  ["בֿ"]={ "ב","ֿ" },
+  ["כֿ"]={ "כ","ֿ" },
+  ["פֿ"]={ "פ","ֿ" },
+  ["𑂚"]={ "𑂙","𑂺" },
+  ["𑂜"]={ "𑂛","𑂺" },
+  ["𑂫"]={ "𑂥","𑂺" },
+  ["𑄮"]={ "𑄱","𑄧" },
+  ["𑄯"]={ "𑄲","𑄧" },
+  ["𑍋"]={ "𑍇","𑌾" },
+  ["𑍌"]={ "𑍇","𑍗" },
+  ["𑒻"]={ "𑒹","𑒺" },
+  ["𑒼"]={ "𑒹","𑒰" },
+  ["𑒾"]={ "𑒹","𑒽" },
+  ["𑖺"]={ "𑖸","𑖯" },
+  ["𑖻"]={ "𑖹","𑖯" },
+  ["𝅗𝅥"]={ "𝅗","𝅥" },
+  ["𝅘𝅥"]={ "𝅘","𝅥" },
+  ["𝅘𝅥𝅮"]={ "𝅘𝅥","𝅮" },
+  ["𝅘𝅥𝅯"]={ "𝅘𝅥","𝅯" },
+  ["𝅘𝅥𝅰"]={ "𝅘𝅥","𝅰" },
+  ["𝅘𝅥𝅱"]={ "𝅘𝅥","𝅱" },
+  ["𝅘𝅥𝅲"]={ "𝅘𝅥","𝅲" },
+  ["𝆹𝅥"]={ "𝆹","𝅥" },
+  ["𝆺𝅥"]={ "𝆺","𝅥" },
+  ["𝆹𝅥𝅮"]={ "𝆹𝅥","𝅮" },
+  ["𝆺𝅥𝅮"]={ "𝆺𝅥","𝅮" },
+  ["𝆹𝅥𝅯"]={ "𝆹𝅥","𝅯" },
+  ["𝆺𝅥𝅯"]={ "𝆺𝅥","𝅯" },
+  },
+ },
+ {
+  ["data"]={
+  ["À"]={ "A","̀" },
+  ["Á"]={ "A","́" },
+  ["Â"]={ "A","̂" },
+  ["Ã"]={ "A","̃" },
+  ["Ä"]={ "A","̈" },
+  ["Å"]={ "A","̊" },
+  ["Ç"]={ "C","̧" },
+  ["È"]={ "E","̀" },
+  ["É"]={ "E","́" },
+  ["Ê"]={ "E","̂" },
+  ["Ë"]={ "E","̈" },
+  ["Ì"]={ "I","̀" },
+  ["Í"]={ "I","́" },
+  ["Î"]={ "I","̂" },
+  ["Ï"]={ "I","̈" },
+  ["Ñ"]={ "N","̃" },
+  ["Ò"]={ "O","̀" },
+  ["Ó"]={ "O","́" },
+  ["Ô"]={ "O","̂" },
+  ["Õ"]={ "O","̃" },
+  ["Ö"]={ "O","̈" },
+  ["Ù"]={ "U","̀" },
+  ["Ú"]={ "U","́" },
+  ["Û"]={ "U","̂" },
+  ["Ü"]={ "U","̈" },
+  ["Ý"]={ "Y","́" },
+  ["à"]={ "a","̀" },
+  ["á"]={ "a","́" },
+  ["â"]={ "a","̂" },
+  ["ã"]={ "a","̃" },
+  ["ä"]={ "a","̈" },
+  ["å"]={ "a","̊" },
+  ["ç"]={ "c","̧" },
+  ["è"]={ "e","̀" },
+  ["é"]={ "e","́" },
+  ["ê"]={ "e","̂" },
+  ["ë"]={ "e","̈" },
+  ["ì"]={ "i","̀" },
+  ["í"]={ "i","́" },
+  ["î"]={ "i","̂" },
+  ["ï"]={ "i","̈" },
+  ["ñ"]={ "n","̃" },
+  ["ò"]={ "o","̀" },
+  ["ó"]={ "o","́" },
+  ["ô"]={ "o","̂" },
+  ["õ"]={ "o","̃" },
+  ["ö"]={ "o","̈" },
+  ["ù"]={ "u","̀" },
+  ["ú"]={ "u","́" },
+  ["û"]={ "u","̂" },
+  ["ü"]={ "u","̈" },
+  ["ý"]={ "y","́" },
+  ["ÿ"]={ "y","̈" },
+  ["Ā"]={ "A","̄" },
+  ["ā"]={ "a","̄" },
+  ["Ă"]={ "A","̆" },
+  ["ă"]={ "a","̆" },
+  ["Ą"]={ "A","̨" },
+  ["ą"]={ "a","̨" },
+  ["Ć"]={ "C","́" },
+  ["ć"]={ "c","́" },
+  ["Ĉ"]={ "C","̂" },
+  ["ĉ"]={ "c","̂" },
+  ["Ċ"]={ "C","̇" },
+  ["ċ"]={ "c","̇" },
+  ["Č"]={ "C","̌" },
+  ["č"]={ "c","̌" },
+  ["Ď"]={ "D","̌" },
+  ["ď"]={ "d","̌" },
+  ["Ē"]={ "E","̄" },
+  ["ē"]={ "e","̄" },
+  ["Ĕ"]={ "E","̆" },
+  ["ĕ"]={ "e","̆" },
+  ["Ė"]={ "E","̇" },
+  ["ė"]={ "e","̇" },
+  ["Ę"]={ "E","̨" },
+  ["ę"]={ "e","̨" },
+  ["Ě"]={ "E","̌" },
+  ["ě"]={ "e","̌" },
+  ["Ĝ"]={ "G","̂" },
+  ["ĝ"]={ "g","̂" },
+  ["Ğ"]={ "G","̆" },
+  ["ğ"]={ "g","̆" },
+  ["Ġ"]={ "G","̇" },
+  ["ġ"]={ "g","̇" },
+  ["Ģ"]={ "G","̧" },
+  ["ģ"]={ "g","̧" },
+  ["Ĥ"]={ "H","̂" },
+  ["ĥ"]={ "h","̂" },
+  ["Ĩ"]={ "I","̃" },
+  ["ĩ"]={ "i","̃" },
+  ["Ī"]={ "I","̄" },
+  ["ī"]={ "i","̄" },
+  ["Ĭ"]={ "I","̆" },
+  ["ĭ"]={ "i","̆" },
+  ["Į"]={ "I","̨" },
+  ["į"]={ "i","̨" },
+  ["İ"]={ "I","̇" },
+  ["Ĵ"]={ "J","̂" },
+  ["ĵ"]={ "j","̂" },
+  ["Ķ"]={ "K","̧" },
+  ["ķ"]={ "k","̧" },
+  ["Ĺ"]={ "L","́" },
+  ["ĺ"]={ "l","́" },
+  ["Ļ"]={ "L","̧" },
+  ["ļ"]={ "l","̧" },
+  ["Ľ"]={ "L","̌" },
+  ["ľ"]={ "l","̌" },
+  ["Ń"]={ "N","́" },
+  ["ń"]={ "n","́" },
+  ["Ņ"]={ "N","̧" },
+  ["ņ"]={ "n","̧" },
+  ["Ň"]={ "N","̌" },
+  ["ň"]={ "n","̌" },
+  ["Ō"]={ "O","̄" },
+  ["ō"]={ "o","̄" },
+  ["Ŏ"]={ "O","̆" },
+  ["ŏ"]={ "o","̆" },
+  ["Ő"]={ "O","̋" },
+  ["ő"]={ "o","̋" },
+  ["Ŕ"]={ "R","́" },
+  ["ŕ"]={ "r","́" },
+  ["Ŗ"]={ "R","̧" },
+  ["ŗ"]={ "r","̧" },
+  ["Ř"]={ "R","̌" },
+  ["ř"]={ "r","̌" },
+  ["Ś"]={ "S","́" },
+  ["ś"]={ "s","́" },
+  ["Ŝ"]={ "S","̂" },
+  ["ŝ"]={ "s","̂" },
+  ["Ş"]={ "S","̧" },
+  ["ş"]={ "s","̧" },
+  ["Š"]={ "S","̌" },
+  ["š"]={ "s","̌" },
+  ["Ţ"]={ "T","̧" },
+  ["ţ"]={ "t","̧" },
+  ["Ť"]={ "T","̌" },
+  ["ť"]={ "t","̌" },
+  ["Ũ"]={ "U","̃" },
+  ["ũ"]={ "u","̃" },
+  ["Ū"]={ "U","̄" },
+  ["ū"]={ "u","̄" },
+  ["Ŭ"]={ "U","̆" },
+  ["ŭ"]={ "u","̆" },
+  ["Ů"]={ "U","̊" },
+  ["ů"]={ "u","̊" },
+  ["Ű"]={ "U","̋" },
+  ["ű"]={ "u","̋" },
+  ["Ų"]={ "U","̨" },
+  ["ų"]={ "u","̨" },
+  ["Ŵ"]={ "W","̂" },
+  ["ŵ"]={ "w","̂" },
+  ["Ŷ"]={ "Y","̂" },
+  ["ŷ"]={ "y","̂" },
+  ["Ÿ"]={ "Y","̈" },
+  ["Ź"]={ "Z","́" },
+  ["ź"]={ "z","́" },
+  ["Ż"]={ "Z","̇" },
+  ["ż"]={ "z","̇" },
+  ["Ž"]={ "Z","̌" },
+  ["ž"]={ "z","̌" },
+  ["Ơ"]={ "O","̛" },
+  ["ơ"]={ "o","̛" },
+  ["Ư"]={ "U","̛" },
+  ["ư"]={ "u","̛" },
+  ["Ǎ"]={ "A","̌" },
+  ["ǎ"]={ "a","̌" },
+  ["Ǐ"]={ "I","̌" },
+  ["ǐ"]={ "i","̌" },
+  ["Ǒ"]={ "O","̌" },
+  ["ǒ"]={ "o","̌" },
+  ["Ǔ"]={ "U","̌" },
+  ["ǔ"]={ "u","̌" },
+  ["Ǖ"]={ "Ü","̄" },
+  ["ǖ"]={ "ü","̄" },
+  ["Ǘ"]={ "Ü","́" },
+  ["ǘ"]={ "ü","́" },
+  ["Ǚ"]={ "Ü","̌" },
+  ["ǚ"]={ "ü","̌" },
+  ["Ǜ"]={ "Ü","̀" },
+  ["ǜ"]={ "ü","̀" },
+  ["Ǟ"]={ "Ä","̄" },
+  ["ǟ"]={ "ä","̄" },
+  ["Ǡ"]={ "Ȧ","̄" },
+  ["ǡ"]={ "ȧ","̄" },
+  ["Ǣ"]={ "Æ","̄" },
+  ["ǣ"]={ "æ","̄" },
+  ["Ǧ"]={ "G","̌" },
+  ["ǧ"]={ "g","̌" },
+  ["Ǩ"]={ "K","̌" },
+  ["ǩ"]={ "k","̌" },
+  ["Ǫ"]={ "O","̨" },
+  ["ǫ"]={ "o","̨" },
+  ["Ǭ"]={ "Ǫ","̄" },
+  ["ǭ"]={ "ǫ","̄" },
+  ["Ǯ"]={ "Ʒ","̌" },
+  ["ǯ"]={ "ʒ","̌" },
+  ["ǰ"]={ "j","̌" },
+  ["Ǵ"]={ "G","́" },
+  ["ǵ"]={ "g","́" },
+  ["Ǹ"]={ "N","̀" },
+  ["ǹ"]={ "n","̀" },
+  ["Ǻ"]={ "Å","́" },
+  ["ǻ"]={ "å","́" },
+  ["Ǽ"]={ "Æ","́" },
+  ["ǽ"]={ "æ","́" },
+  ["Ǿ"]={ "Ø","́" },
+  ["ǿ"]={ "ø","́" },
+  ["Ȁ"]={ "A","̏" },
+  ["ȁ"]={ "a","̏" },
+  ["Ȃ"]={ "A","̑" },
+  ["ȃ"]={ "a","̑" },
+  ["Ȅ"]={ "E","̏" },
+  ["ȅ"]={ "e","̏" },
+  ["Ȇ"]={ "E","̑" },
+  ["ȇ"]={ "e","̑" },
+  ["Ȉ"]={ "I","̏" },
+  ["ȉ"]={ "i","̏" },
+  ["Ȋ"]={ "I","̑" },
+  ["ȋ"]={ "i","̑" },
+  ["Ȍ"]={ "O","̏" },
+  ["ȍ"]={ "o","̏" },
+  ["Ȏ"]={ "O","̑" },
+  ["ȏ"]={ "o","̑" },
+  ["Ȑ"]={ "R","̏" },
+  ["ȑ"]={ "r","̏" },
+  ["Ȓ"]={ "R","̑" },
+  ["ȓ"]={ "r","̑" },
+  ["Ȕ"]={ "U","̏" },
+  ["ȕ"]={ "u","̏" },
+  ["Ȗ"]={ "U","̑" },
+  ["ȗ"]={ "u","̑" },
+  ["Ș"]={ "S","̦" },
+  ["ș"]={ "s","̦" },
+  ["Ț"]={ "T","̦" },
+  ["ț"]={ "t","̦" },
+  ["Ȟ"]={ "H","̌" },
+  ["ȟ"]={ "h","̌" },
+  ["Ȧ"]={ "A","̇" },
+  ["ȧ"]={ "a","̇" },
+  ["Ȩ"]={ "E","̧" },
+  ["ȩ"]={ "e","̧" },
+  ["Ȫ"]={ "Ö","̄" },
+  ["ȫ"]={ "ö","̄" },
+  ["Ȭ"]={ "Õ","̄" },
+  ["ȭ"]={ "õ","̄" },
+  ["Ȯ"]={ "O","̇" },
+  ["ȯ"]={ "o","̇" },
+  ["Ȱ"]={ "Ȯ","̄" },
+  ["ȱ"]={ "ȯ","̄" },
+  ["Ȳ"]={ "Y","̄" },
+  ["ȳ"]={ "y","̄" },
+  ["̈́"]={ "̈","́" },
+  ["΅"]={ "¨","́" },
+  ["Ά"]={ "Α","́" },
+  ["Έ"]={ "Ε","́" },
+  ["Ή"]={ "Η","́" },
+  ["Ί"]={ "Ι","́" },
+  ["Ό"]={ "Ο","́" },
+  ["Ύ"]={ "Υ","́" },
+  ["Ώ"]={ "Ω","́" },
+  ["ΐ"]={ "ϊ","́" },
+  ["Ϊ"]={ "Ι","̈" },
+  ["Ϋ"]={ "Υ","̈" },
+  ["ά"]={ "α","́" },
+  ["έ"]={ "ε","́" },
+  ["ή"]={ "η","́" },
+  ["ί"]={ "ι","́" },
+  ["ΰ"]={ "ϋ","́" },
+  ["ϊ"]={ "ι","̈" },
+  ["ϋ"]={ "υ","̈" },
+  ["ό"]={ "ο","́" },
+  ["ύ"]={ "υ","́" },
+  ["ώ"]={ "ω","́" },
+  ["ϓ"]={ "ϒ","́" },
+  ["ϔ"]={ "ϒ","̈" },
+  ["Ѐ"]={ "Е","̀" },
+  ["Ё"]={ "Е","̈" },
+  ["Ѓ"]={ "Г","́" },
+  ["Ї"]={ "І","̈" },
+  ["Ќ"]={ "К","́" },
+  ["Ѝ"]={ "И","̀" },
+  ["Ў"]={ "У","̆" },
+  ["Й"]={ "И","̆" },
+  ["й"]={ "и","̆" },
+  ["ѐ"]={ "е","̀" },
+  ["ё"]={ "е","̈" },
+  ["ѓ"]={ "г","́" },
+  ["ї"]={ "і","̈" },
+  ["ќ"]={ "к","́" },
+  ["ѝ"]={ "и","̀" },
+  ["ў"]={ "у","̆" },
+  ["Ѷ"]={ "Ѵ","̏" },
+  ["ѷ"]={ "ѵ","̏" },
+  ["Ӂ"]={ "Ж","̆" },
+  ["ӂ"]={ "ж","̆" },
+  ["Ӑ"]={ "А","̆" },
+  ["ӑ"]={ "а","̆" },
+  ["Ӓ"]={ "А","̈" },
+  ["ӓ"]={ "а","̈" },
+  ["Ӗ"]={ "Е","̆" },
+  ["ӗ"]={ "е","̆" },
+  ["Ӛ"]={ "Ә","̈" },
+  ["ӛ"]={ "ә","̈" },
+  ["Ӝ"]={ "Ж","̈" },
+  ["ӝ"]={ "ж","̈" },
+  ["Ӟ"]={ "З","̈" },
+  ["ӟ"]={ "з","̈" },
+  ["Ӣ"]={ "И","̄" },
+  ["ӣ"]={ "и","̄" },
+  ["Ӥ"]={ "И","̈" },
+  ["ӥ"]={ "и","̈" },
+  ["Ӧ"]={ "О","̈" },
+  ["ӧ"]={ "о","̈" },
+  ["Ӫ"]={ "Ө","̈" },
+  ["ӫ"]={ "ө","̈" },
+  ["Ӭ"]={ "Э","̈" },
+  ["ӭ"]={ "э","̈" },
+  ["Ӯ"]={ "У","̄" },
+  ["ӯ"]={ "у","̄" },
+  ["Ӱ"]={ "У","̈" },
+  ["ӱ"]={ "у","̈" },
+  ["Ӳ"]={ "У","̋" },
+  ["ӳ"]={ "у","̋" },
+  ["Ӵ"]={ "Ч","̈" },
+  ["ӵ"]={ "ч","̈" },
+  ["Ӹ"]={ "Ы","̈" },
+  ["ӹ"]={ "ы","̈" },
+  ["آ"]={ "ا","ٓ" },
+  ["أ"]={ "ا","ٔ" },
+  ["ؤ"]={ "و","ٔ" },
+  ["إ"]={ "ا","ٕ" },
+  ["ئ"]={ "ي","ٔ" },
+  ["ۀ"]={ "ە","ٔ" },
+  ["ۂ"]={ "ہ","ٔ" },
+  ["ۓ"]={ "ے","ٔ" },
+  ["ऩ"]={ "न","़" },
+  ["ऱ"]={ "र","़" },
+  ["ऴ"]={ "ळ","़" },
+  ["क़"]={ "क","़" },
+  ["ख़"]={ "ख","़" },
+  ["ग़"]={ "ग","़" },
+  ["ज़"]={ "ज","़" },
+  ["ड़"]={ "ड","़" },
+  ["ढ़"]={ "ढ","़" },
+  ["फ़"]={ "फ","़" },
+  ["य़"]={ "य","़" },
+  ["ো"]={ "ে","া" },
+  ["ৌ"]={ "ে","ৗ" },
+  ["ড়"]={ "ড","়" },
+  ["ঢ়"]={ "ঢ","়" },
+  ["য়"]={ "য","়" },
+  ["ਲ਼"]={ "ਲ","਼" },
+  ["ਸ਼"]={ "ਸ","਼" },
+  ["ਖ਼"]={ "ਖ","਼" },
+  ["ਗ਼"]={ "ਗ","਼" },
+  ["ਜ਼"]={ "ਜ","਼" },
+  ["ਫ਼"]={ "ਫ","਼" },
+  ["ୈ"]={ "େ","ୖ" },
+  ["ୋ"]={ "େ","ା" },
+  ["ୌ"]={ "େ","ୗ" },
+  ["ଡ଼"]={ "ଡ","଼" },
+  ["ଢ଼"]={ "ଢ","଼" },
+  ["ஔ"]={ "ஒ","ௗ" },
+  ["ொ"]={ "ெ","ா" },
+  ["ோ"]={ "ே","ா" },
+  ["ௌ"]={ "ெ","ௗ" },
+  ["ై"]={ "ె","ౖ" },
+  ["ೀ"]={ "ಿ","ೕ" },
+  ["ೇ"]={ "ೆ","ೕ" },
+  ["ೈ"]={ "ೆ","ೖ" },
+  ["ೊ"]={ "ೆ","ೂ" },
+  ["ೋ"]={ "ೊ","ೕ" },
+  ["ൊ"]={ "െ","ാ" },
+  ["ോ"]={ "േ","ാ" },
+  ["ൌ"]={ "െ","ൗ" },
+  ["ේ"]={ "ෙ","්" },
+  ["ො"]={ "ෙ","ා" },
+  ["ෝ"]={ "ො","්" },
+  ["ෞ"]={ "ෙ","ෟ" },
+  ["གྷ"]={ "ག","ྷ" },
+  ["ཌྷ"]={ "ཌ","ྷ" },
+  ["དྷ"]={ "ད","ྷ" },
+  ["བྷ"]={ "བ","ྷ" },
+  ["ཛྷ"]={ "ཛ","ྷ" },
+  ["ཀྵ"]={ "ཀ","ྵ" },
+  ["ཱི"]={ "ཱ","ི" },
+  ["ཱུ"]={ "ཱ","ུ" },
+  ["ྲྀ"]={ "ྲ","ྀ" },
+  ["ླྀ"]={ "ླ","ྀ" },
+  ["ཱྀ"]={ "ཱ","ྀ" },
+  ["ྒྷ"]={ "ྒ","ྷ" },
+  ["ྜྷ"]={ "ྜ","ྷ" },
+  ["ྡྷ"]={ "ྡ","ྷ" },
+  ["ྦྷ"]={ "ྦ","ྷ" },
+  ["ྫྷ"]={ "ྫ","ྷ" },
+  ["ྐྵ"]={ "ྐ","ྵ" },
+  ["ဦ"]={ "ဥ","ီ" },
+  ["ᬆ"]={ "ᬅ","ᬵ" },
+  ["ᬈ"]={ "ᬇ","ᬵ" },
+  ["ᬊ"]={ "ᬉ","ᬵ" },
+  ["ᬌ"]={ "ᬋ","ᬵ" },
+  ["ᬎ"]={ "ᬍ","ᬵ" },
+  ["ᬒ"]={ "ᬑ","ᬵ" },
+  ["ᬻ"]={ "ᬺ","ᬵ" },
+  ["ᬽ"]={ "ᬼ","ᬵ" },
+  ["ᭀ"]={ "ᬾ","ᬵ" },
+  ["ᭁ"]={ "ᬿ","ᬵ" },
+  ["ᭃ"]={ "ᭂ","ᬵ" },
+  ["Ḁ"]={ "A","̥" },
+  ["ḁ"]={ "a","̥" },
+  ["Ḃ"]={ "B","̇" },
+  ["ḃ"]={ "b","̇" },
+  ["Ḅ"]={ "B","̣" },
+  ["ḅ"]={ "b","̣" },
+  ["Ḇ"]={ "B","̱" },
+  ["ḇ"]={ "b","̱" },
+  ["Ḉ"]={ "Ç","́" },
+  ["ḉ"]={ "ç","́" },
+  ["Ḋ"]={ "D","̇" },
+  ["ḋ"]={ "d","̇" },
+  ["Ḍ"]={ "D","̣" },
+  ["ḍ"]={ "d","̣" },
+  ["Ḏ"]={ "D","̱" },
+  ["ḏ"]={ "d","̱" },
+  ["Ḑ"]={ "D","̧" },
+  ["ḑ"]={ "d","̧" },
+  ["Ḓ"]={ "D","̭" },
+  ["ḓ"]={ "d","̭" },
+  ["Ḕ"]={ "Ē","̀" },
+  ["ḕ"]={ "ē","̀" },
+  ["Ḗ"]={ "Ē","́" },
+  ["ḗ"]={ "ē","́" },
+  ["Ḙ"]={ "E","̭" },
+  ["ḙ"]={ "e","̭" },
+  ["Ḛ"]={ "E","̰" },
+  ["ḛ"]={ "e","̰" },
+  ["Ḝ"]={ "Ȩ","̆" },
+  ["ḝ"]={ "ȩ","̆" },
+  ["Ḟ"]={ "F","̇" },
+  ["ḟ"]={ "f","̇" },
+  ["Ḡ"]={ "G","̄" },
+  ["ḡ"]={ "g","̄" },
+  ["Ḣ"]={ "H","̇" },
+  ["ḣ"]={ "h","̇" },
+  ["Ḥ"]={ "H","̣" },
+  ["ḥ"]={ "h","̣" },
+  ["Ḧ"]={ "H","̈" },
+  ["ḧ"]={ "h","̈" },
+  ["Ḩ"]={ "H","̧" },
+  ["ḩ"]={ "h","̧" },
+  ["Ḫ"]={ "H","̮" },
+  ["ḫ"]={ "h","̮" },
+  ["Ḭ"]={ "I","̰" },
+  ["ḭ"]={ "i","̰" },
+  ["Ḯ"]={ "Ï","́" },
+  ["ḯ"]={ "ï","́" },
+  ["Ḱ"]={ "K","́" },
+  ["ḱ"]={ "k","́" },
+  ["Ḳ"]={ "K","̣" },
+  ["ḳ"]={ "k","̣" },
+  ["Ḵ"]={ "K","̱" },
+  ["ḵ"]={ "k","̱" },
+  ["Ḷ"]={ "L","̣" },
+  ["ḷ"]={ "l","̣" },
+  ["Ḹ"]={ "Ḷ","̄" },
+  ["ḹ"]={ "ḷ","̄" },
+  ["Ḻ"]={ "L","̱" },
+  ["ḻ"]={ "l","̱" },
+  ["Ḽ"]={ "L","̭" },
+  ["ḽ"]={ "l","̭" },
+  ["Ḿ"]={ "M","́" },
+  ["ḿ"]={ "m","́" },
+  ["Ṁ"]={ "M","̇" },
+  ["ṁ"]={ "m","̇" },
+  ["Ṃ"]={ "M","̣" },
+  ["ṃ"]={ "m","̣" },
+  ["Ṅ"]={ "N","̇" },
+  ["ṅ"]={ "n","̇" },
+  ["Ṇ"]={ "N","̣" },
+  ["ṇ"]={ "n","̣" },
+  ["Ṉ"]={ "N","̱" },
+  ["ṉ"]={ "n","̱" },
+  ["Ṋ"]={ "N","̭" },
+  ["ṋ"]={ "n","̭" },
+  ["Ṍ"]={ "Õ","́" },
+  ["ṍ"]={ "õ","́" },
+  ["Ṏ"]={ "Õ","̈" },
+  ["ṏ"]={ "õ","̈" },
+  ["Ṑ"]={ "Ō","̀" },
+  ["ṑ"]={ "ō","̀" },
+  ["Ṓ"]={ "Ō","́" },
+  ["ṓ"]={ "ō","́" },
+  ["Ṕ"]={ "P","́" },
+  ["ṕ"]={ "p","́" },
+  ["Ṗ"]={ "P","̇" },
+  ["ṗ"]={ "p","̇" },
+  ["Ṙ"]={ "R","̇" },
+  ["ṙ"]={ "r","̇" },
+  ["Ṛ"]={ "R","̣" },
+  ["ṛ"]={ "r","̣" },
+  ["Ṝ"]={ "Ṛ","̄" },
+  ["ṝ"]={ "ṛ","̄" },
+  ["Ṟ"]={ "R","̱" },
+  ["ṟ"]={ "r","̱" },
+  ["Ṡ"]={ "S","̇" },
+  ["ṡ"]={ "s","̇" },
+  ["Ṣ"]={ "S","̣" },
+  ["ṣ"]={ "s","̣" },
+  ["Ṥ"]={ "Ś","̇" },
+  ["ṥ"]={ "ś","̇" },
+  ["Ṧ"]={ "Š","̇" },
+  ["ṧ"]={ "š","̇" },
+  ["Ṩ"]={ "Ṣ","̇" },
+  ["ṩ"]={ "ṣ","̇" },
+  ["Ṫ"]={ "T","̇" },
+  ["ṫ"]={ "t","̇" },
+  ["Ṭ"]={ "T","̣" },
+  ["ṭ"]={ "t","̣" },
+  ["Ṯ"]={ "T","̱" },
+  ["ṯ"]={ "t","̱" },
+  ["Ṱ"]={ "T","̭" },
+  ["ṱ"]={ "t","̭" },
+  ["Ṳ"]={ "U","̤" },
+  ["ṳ"]={ "u","̤" },
+  ["Ṵ"]={ "U","̰" },
+  ["ṵ"]={ "u","̰" },
+  ["Ṷ"]={ "U","̭" },
+  ["ṷ"]={ "u","̭" },
+  ["Ṹ"]={ "Ũ","́" },
+  ["ṹ"]={ "ũ","́" },
+  ["Ṻ"]={ "Ū","̈" },
+  ["ṻ"]={ "ū","̈" },
+  ["Ṽ"]={ "V","̃" },
+  ["ṽ"]={ "v","̃" },
+  ["Ṿ"]={ "V","̣" },
+  ["ṿ"]={ "v","̣" },
+  ["Ẁ"]={ "W","̀" },
+  ["ẁ"]={ "w","̀" },
+  ["Ẃ"]={ "W","́" },
+  ["ẃ"]={ "w","́" },
+  ["Ẅ"]={ "W","̈" },
+  ["ẅ"]={ "w","̈" },
+  ["Ẇ"]={ "W","̇" },
+  ["ẇ"]={ "w","̇" },
+  ["Ẉ"]={ "W","̣" },
+  ["ẉ"]={ "w","̣" },
+  ["Ẋ"]={ "X","̇" },
+  ["ẋ"]={ "x","̇" },
+  ["Ẍ"]={ "X","̈" },
+  ["ẍ"]={ "x","̈" },
+  ["Ẏ"]={ "Y","̇" },
+  ["ẏ"]={ "y","̇" },
+  ["Ẑ"]={ "Z","̂" },
+  ["ẑ"]={ "z","̂" },
+  ["Ẓ"]={ "Z","̣" },
+  ["ẓ"]={ "z","̣" },
+  ["Ẕ"]={ "Z","̱" },
+  ["ẕ"]={ "z","̱" },
+  ["ẖ"]={ "h","̱" },
+  ["ẗ"]={ "t","̈" },
+  ["ẘ"]={ "w","̊" },
+  ["ẙ"]={ "y","̊" },
+  ["ẛ"]={ "ſ","̇" },
+  ["Ạ"]={ "A","̣" },
+  ["ạ"]={ "a","̣" },
+  ["Ả"]={ "A","̉" },
+  ["ả"]={ "a","̉" },
+  ["Ấ"]={ "Â","́" },
+  ["ấ"]={ "â","́" },
+  ["Ầ"]={ "Â","̀" },
+  ["ầ"]={ "â","̀" },
+  ["Ẩ"]={ "Â","̉" },
+  ["ẩ"]={ "â","̉" },
+  ["Ẫ"]={ "Â","̃" },
+  ["ẫ"]={ "â","̃" },
+  ["Ậ"]={ "Ạ","̂" },
+  ["ậ"]={ "ạ","̂" },
+  ["Ắ"]={ "Ă","́" },
+  ["ắ"]={ "ă","́" },
+  ["Ằ"]={ "Ă","̀" },
+  ["ằ"]={ "ă","̀" },
+  ["Ẳ"]={ "Ă","̉" },
+  ["ẳ"]={ "ă","̉" },
+  ["Ẵ"]={ "Ă","̃" },
+  ["ẵ"]={ "ă","̃" },
+  ["Ặ"]={ "Ạ","̆" },
+  ["ặ"]={ "ạ","̆" },
+  ["Ẹ"]={ "E","̣" },
+  ["ẹ"]={ "e","̣" },
+  ["Ẻ"]={ "E","̉" },
+  ["ẻ"]={ "e","̉" },
+  ["Ẽ"]={ "E","̃" },
+  ["ẽ"]={ "e","̃" },
+  ["Ế"]={ "Ê","́" },
+  ["ế"]={ "ê","́" },
+  ["Ề"]={ "Ê","̀" },
+  ["ề"]={ "ê","̀" },
+  ["Ể"]={ "Ê","̉" },
+  ["ể"]={ "ê","̉" },
+  ["Ễ"]={ "Ê","̃" },
+  ["ễ"]={ "ê","̃" },
+  ["Ệ"]={ "Ẹ","̂" },
+  ["ệ"]={ "ẹ","̂" },
+  ["Ỉ"]={ "I","̉" },
+  ["ỉ"]={ "i","̉" },
+  ["Ị"]={ "I","̣" },
+  ["ị"]={ "i","̣" },
+  ["Ọ"]={ "O","̣" },
+  ["ọ"]={ "o","̣" },
+  ["Ỏ"]={ "O","̉" },
+  ["ỏ"]={ "o","̉" },
+  ["Ố"]={ "Ô","́" },
+  ["ố"]={ "ô","́" },
+  ["Ồ"]={ "Ô","̀" },
+  ["ồ"]={ "ô","̀" },
+  ["Ổ"]={ "Ô","̉" },
+  ["ổ"]={ "ô","̉" },
+  ["Ỗ"]={ "Ô","̃" },
+  ["ỗ"]={ "ô","̃" },
+  ["Ộ"]={ "Ọ","̂" },
+  ["ộ"]={ "ọ","̂" },
+  ["Ớ"]={ "Ơ","́" },
+  ["ớ"]={ "ơ","́" },
+  ["Ờ"]={ "Ơ","̀" },
+  ["ờ"]={ "ơ","̀" },
+  ["Ở"]={ "Ơ","̉" },
+  ["ở"]={ "ơ","̉" },
+  ["Ỡ"]={ "Ơ","̃" },
+  ["ỡ"]={ "ơ","̃" },
+  ["Ợ"]={ "Ơ","̣" },
+  ["ợ"]={ "ơ","̣" },
+  ["Ụ"]={ "U","̣" },
+  ["ụ"]={ "u","̣" },
+  ["Ủ"]={ "U","̉" },
+  ["ủ"]={ "u","̉" },
+  ["Ứ"]={ "Ư","́" },
+  ["ứ"]={ "ư","́" },
+  ["Ừ"]={ "Ư","̀" },
+  ["ừ"]={ "ư","̀" },
+  ["Ử"]={ "Ư","̉" },
+  ["ử"]={ "ư","̉" },
+  ["Ữ"]={ "Ư","̃" },
+  ["ữ"]={ "ư","̃" },
+  ["Ự"]={ "Ư","̣" },
+  ["ự"]={ "ư","̣" },
+  ["Ỳ"]={ "Y","̀" },
+  ["ỳ"]={ "y","̀" },
+  ["Ỵ"]={ "Y","̣" },
+  ["ỵ"]={ "y","̣" },
+  ["Ỷ"]={ "Y","̉" },
+  ["ỷ"]={ "y","̉" },
+  ["Ỹ"]={ "Y","̃" },
+  ["ỹ"]={ "y","̃" },
+  ["ἀ"]={ "α","̓" },
+  ["ἁ"]={ "α","̔" },
+  ["ἂ"]={ "ἀ","̀" },
+  ["ἃ"]={ "ἁ","̀" },
+  ["ἄ"]={ "ἀ","́" },
+  ["ἅ"]={ "ἁ","́" },
+  ["ἆ"]={ "ἀ","͂" },
+  ["ἇ"]={ "ἁ","͂" },
+  ["Ἀ"]={ "Α","̓" },
+  ["Ἁ"]={ "Α","̔" },
+  ["Ἂ"]={ "Ἀ","̀" },
+  ["Ἃ"]={ "Ἁ","̀" },
+  ["Ἄ"]={ "Ἀ","́" },
+  ["Ἅ"]={ "Ἁ","́" },
+  ["Ἆ"]={ "Ἀ","͂" },
+  ["Ἇ"]={ "Ἁ","͂" },
+  ["ἐ"]={ "ε","̓" },
+  ["ἑ"]={ "ε","̔" },
+  ["ἒ"]={ "ἐ","̀" },
+  ["ἓ"]={ "ἑ","̀" },
+  ["ἔ"]={ "ἐ","́" },
+  ["ἕ"]={ "ἑ","́" },
+  ["Ἐ"]={ "Ε","̓" },
+  ["Ἑ"]={ "Ε","̔" },
+  ["Ἒ"]={ "Ἐ","̀" },
+  ["Ἓ"]={ "Ἑ","̀" },
+  ["Ἔ"]={ "Ἐ","́" },
+  ["Ἕ"]={ "Ἑ","́" },
+  ["ἠ"]={ "η","̓" },
+  ["ἡ"]={ "η","̔" },
+  ["ἢ"]={ "ἠ","̀" },
+  ["ἣ"]={ "ἡ","̀" },
+  ["ἤ"]={ "ἠ","́" },
+  ["ἥ"]={ "ἡ","́" },
+  ["ἦ"]={ "ἠ","͂" },
+  ["ἧ"]={ "ἡ","͂" },
+  ["Ἠ"]={ "Η","̓" },
+  ["Ἡ"]={ "Η","̔" },
+  ["Ἢ"]={ "Ἠ","̀" },
+  ["Ἣ"]={ "Ἡ","̀" },
+  ["Ἤ"]={ "Ἠ","́" },
+  ["Ἥ"]={ "Ἡ","́" },
+  ["Ἦ"]={ "Ἠ","͂" },
+  ["Ἧ"]={ "Ἡ","͂" },
+  ["ἰ"]={ "ι","̓" },
+  ["ἱ"]={ "ι","̔" },
+  ["ἲ"]={ "ἰ","̀" },
+  ["ἳ"]={ "ἱ","̀" },
+  ["ἴ"]={ "ἰ","́" },
+  ["ἵ"]={ "ἱ","́" },
+  ["ἶ"]={ "ἰ","͂" },
+  ["ἷ"]={ "ἱ","͂" },
+  ["Ἰ"]={ "Ι","̓" },
+  ["Ἱ"]={ "Ι","̔" },
+  ["Ἲ"]={ "Ἰ","̀" },
+  ["Ἳ"]={ "Ἱ","̀" },
+  ["Ἴ"]={ "Ἰ","́" },
+  ["Ἵ"]={ "Ἱ","́" },
+  ["Ἶ"]={ "Ἰ","͂" },
+  ["Ἷ"]={ "Ἱ","͂" },
+  ["ὀ"]={ "ο","̓" },
+  ["ὁ"]={ "ο","̔" },
+  ["ὂ"]={ "ὀ","̀" },
+  ["ὃ"]={ "ὁ","̀" },
+  ["ὄ"]={ "ὀ","́" },
+  ["ὅ"]={ "ὁ","́" },
+  ["Ὀ"]={ "Ο","̓" },
+  ["Ὁ"]={ "Ο","̔" },
+  ["Ὂ"]={ "Ὀ","̀" },
+  ["Ὃ"]={ "Ὁ","̀" },
+  ["Ὄ"]={ "Ὀ","́" },
+  ["Ὅ"]={ "Ὁ","́" },
+  ["ὐ"]={ "υ","̓" },
+  ["ὑ"]={ "υ","̔" },
+  ["ὒ"]={ "ὐ","̀" },
+  ["ὓ"]={ "ὑ","̀" },
+  ["ὔ"]={ "ὐ","́" },
+  ["ὕ"]={ "ὑ","́" },
+  ["ὖ"]={ "ὐ","͂" },
+  ["ὗ"]={ "ὑ","͂" },
+  ["Ὑ"]={ "Υ","̔" },
+  ["Ὓ"]={ "Ὑ","̀" },
+  ["Ὕ"]={ "Ὑ","́" },
+  ["Ὗ"]={ "Ὑ","͂" },
+  ["ὠ"]={ "ω","̓" },
+  ["ὡ"]={ "ω","̔" },
+  ["ὢ"]={ "ὠ","̀" },
+  ["ὣ"]={ "ὡ","̀" },
+  ["ὤ"]={ "ὠ","́" },
+  ["ὥ"]={ "ὡ","́" },
+  ["ὦ"]={ "ὠ","͂" },
+  ["ὧ"]={ "ὡ","͂" },
+  ["Ὠ"]={ "Ω","̓" },
+  ["Ὡ"]={ "Ω","̔" },
+  ["Ὢ"]={ "Ὠ","̀" },
+  ["Ὣ"]={ "Ὡ","̀" },
+  ["Ὤ"]={ "Ὠ","́" },
+  ["Ὥ"]={ "Ὡ","́" },
+  ["Ὦ"]={ "Ὠ","͂" },
+  ["Ὧ"]={ "Ὡ","͂" },
+  ["ὰ"]={ "α","̀" },
+  ["ὲ"]={ "ε","̀" },
+  ["ὴ"]={ "η","̀" },
+  ["ὶ"]={ "ι","̀" },
+  ["ὸ"]={ "ο","̀" },
+  ["ὺ"]={ "υ","̀" },
+  ["ὼ"]={ "ω","̀" },
+  ["ᾀ"]={ "ἀ","ͅ" },
+  ["ᾁ"]={ "ἁ","ͅ" },
+  ["ᾂ"]={ "ἂ","ͅ" },
+  ["ᾃ"]={ "ἃ","ͅ" },
+  ["ᾄ"]={ "ἄ","ͅ" },
+  ["ᾅ"]={ "ἅ","ͅ" },
+  ["ᾆ"]={ "ἆ","ͅ" },
+  ["ᾇ"]={ "ἇ","ͅ" },
+  ["ᾈ"]={ "Ἀ","ͅ" },
+  ["ᾉ"]={ "Ἁ","ͅ" },
+  ["ᾊ"]={ "Ἂ","ͅ" },
+  ["ᾋ"]={ "Ἃ","ͅ" },
+  ["ᾌ"]={ "Ἄ","ͅ" },
+  ["ᾍ"]={ "Ἅ","ͅ" },
+  ["ᾎ"]={ "Ἆ","ͅ" },
+  ["ᾏ"]={ "Ἇ","ͅ" },
+  ["ᾐ"]={ "ἠ","ͅ" },
+  ["ᾑ"]={ "ἡ","ͅ" },
+  ["ᾒ"]={ "ἢ","ͅ" },
+  ["ᾓ"]={ "ἣ","ͅ" },
+  ["ᾔ"]={ "ἤ","ͅ" },
+  ["ᾕ"]={ "ἥ","ͅ" },
+  ["ᾖ"]={ "ἦ","ͅ" },
+  ["ᾗ"]={ "ἧ","ͅ" },
+  ["ᾘ"]={ "Ἠ","ͅ" },
+  ["ᾙ"]={ "Ἡ","ͅ" },
+  ["ᾚ"]={ "Ἢ","ͅ" },
+  ["ᾛ"]={ "Ἣ","ͅ" },
+  ["ᾜ"]={ "Ἤ","ͅ" },
+  ["ᾝ"]={ "Ἥ","ͅ" },
+  ["ᾞ"]={ "Ἦ","ͅ" },
+  ["ᾟ"]={ "Ἧ","ͅ" },
+  ["ᾠ"]={ "ὠ","ͅ" },
+  ["ᾡ"]={ "ὡ","ͅ" },
+  ["ᾢ"]={ "ὢ","ͅ" },
+  ["ᾣ"]={ "ὣ","ͅ" },
+  ["ᾤ"]={ "ὤ","ͅ" },
+  ["ᾥ"]={ "ὥ","ͅ" },
+  ["ᾦ"]={ "ὦ","ͅ" },
+  ["ᾧ"]={ "ὧ","ͅ" },
+  ["ᾨ"]={ "Ὠ","ͅ" },
+  ["ᾩ"]={ "Ὡ","ͅ" },
+  ["ᾪ"]={ "Ὢ","ͅ" },
+  ["ᾫ"]={ "Ὣ","ͅ" },
+  ["ᾬ"]={ "Ὤ","ͅ" },
+  ["ᾭ"]={ "Ὥ","ͅ" },
+  ["ᾮ"]={ "Ὦ","ͅ" },
+  ["ᾯ"]={ "Ὧ","ͅ" },
+  ["ᾰ"]={ "α","̆" },
+  ["ᾱ"]={ "α","̄" },
+  ["ᾲ"]={ "ὰ","ͅ" },
+  ["ᾳ"]={ "α","ͅ" },
+  ["ᾴ"]={ "ά","ͅ" },
+  ["ᾶ"]={ "α","͂" },
+  ["ᾷ"]={ "ᾶ","ͅ" },
+  ["Ᾰ"]={ "Α","̆" },
+  ["Ᾱ"]={ "Α","̄" },
+  ["Ὰ"]={ "Α","̀" },
+  ["ᾼ"]={ "Α","ͅ" },
+  ["῁"]={ "¨","͂" },
+  ["ῂ"]={ "ὴ","ͅ" },
+  ["ῃ"]={ "η","ͅ" },
+  ["ῄ"]={ "ή","ͅ" },
+  ["ῆ"]={ "η","͂" },
+  ["ῇ"]={ "ῆ","ͅ" },
+  ["Ὲ"]={ "Ε","̀" },
+  ["Ὴ"]={ "Η","̀" },
+  ["ῌ"]={ "Η","ͅ" },
+  ["῍"]={ "᾿","̀" },
+  ["῎"]={ "᾿","́" },
+  ["῏"]={ "᾿","͂" },
+  ["ῐ"]={ "ι","̆" },
+  ["ῑ"]={ "ι","̄" },
+  ["ῒ"]={ "ϊ","̀" },
+  ["ῖ"]={ "ι","͂" },
+  ["ῗ"]={ "ϊ","͂" },
+  ["Ῐ"]={ "Ι","̆" },
+  ["Ῑ"]={ "Ι","̄" },
+  ["Ὶ"]={ "Ι","̀" },
+  ["῝"]={ "῾","̀" },
+  ["῞"]={ "῾","́" },
+  ["῟"]={ "῾","͂" },
+  ["ῠ"]={ "υ","̆" },
+  ["ῡ"]={ "υ","̄" },
+  ["ῢ"]={ "ϋ","̀" },
+  ["ῤ"]={ "ρ","̓" },
+  ["ῥ"]={ "ρ","̔" },
+  ["ῦ"]={ "υ","͂" },
+  ["ῧ"]={ "ϋ","͂" },
+  ["Ῠ"]={ "Υ","̆" },
+  ["Ῡ"]={ "Υ","̄" },
+  ["Ὺ"]={ "Υ","̀" },
+  ["Ῥ"]={ "Ρ","̔" },
+  ["῭"]={ "¨","̀" },
+  ["ῲ"]={ "ὼ","ͅ" },
+  ["ῳ"]={ "ω","ͅ" },
+  ["ῴ"]={ "ώ","ͅ" },
+  ["ῶ"]={ "ω","͂" },
+  ["ῷ"]={ "ῶ","ͅ" },
+  ["Ὸ"]={ "Ο","̀" },
+  ["Ὼ"]={ "Ω","̀" },
+  ["ῼ"]={ "Ω","ͅ" },
+  ["↚"]={ "←","̸" },
+  ["↛"]={ "→","̸" },
+  ["↮"]={ "↔","̸" },
+  ["⇍"]={ "⇐","̸" },
+  ["⇎"]={ "⇔","̸" },
+  ["⇏"]={ "⇒","̸" },
+  ["∄"]={ "∃","̸" },
+  ["∉"]={ "∈","̸" },
+  ["∌"]={ "∋","̸" },
+  ["∤"]={ "∣","̸" },
+  ["∦"]={ "∥","̸" },
+  ["≁"]={ "∼","̸" },
+  ["≄"]={ "≃","̸" },
+  ["≇"]={ "≅","̸" },
+  ["≉"]={ "≈","̸" },
+  ["≠"]={ "=","̸" },
+  ["≢"]={ "≡","̸" },
+  ["≭"]={ "≍","̸" },
+  ["≮"]={ "<","̸" },
+  ["≯"]={ ">","̸" },
+  ["≰"]={ "≤","̸" },
+  ["≱"]={ "≥","̸" },
+  ["≴"]={ "≲","̸" },
+  ["≵"]={ "≳","̸" },
+  ["≸"]={ "≶","̸" },
+  ["≹"]={ "≷","̸" },
+  ["⊀"]={ "≺","̸" },
+  ["⊁"]={ "≻","̸" },
+  ["⊄"]={ "⊂","̸" },
+  ["⊅"]={ "⊃","̸" },
+  ["⊈"]={ "⊆","̸" },
+  ["⊉"]={ "⊇","̸" },
+  ["⊬"]={ "⊢","̸" },
+  ["⊭"]={ "⊨","̸" },
+  ["⊮"]={ "⊩","̸" },
+  ["⊯"]={ "⊫","̸" },
+  ["⋠"]={ "≼","̸" },
+  ["⋡"]={ "≽","̸" },
+  ["⋢"]={ "⊑","̸" },
+  ["⋣"]={ "⊒","̸" },
+  ["⋪"]={ "⊲","̸" },
+  ["⋫"]={ "⊳","̸" },
+  ["⋬"]={ "⊴","̸" },
+  ["⋭"]={ "⊵","̸" },
+  ["⫝̸"]={ "⫝","̸" },
+  ["が"]={ "か","゙" },
+  ["ぎ"]={ "き","゙" },
+  ["ぐ"]={ "く","゙" },
+  ["げ"]={ "け","゙" },
+  ["ご"]={ "こ","゙" },
+  ["ざ"]={ "さ","゙" },
+  ["じ"]={ "し","゙" },
+  ["ず"]={ "す","゙" },
+  ["ぜ"]={ "せ","゙" },
+  ["ぞ"]={ "そ","゙" },
+  ["だ"]={ "た","゙" },
+  ["ぢ"]={ "ち","゙" },
+  ["づ"]={ "つ","゙" },
+  ["で"]={ "て","゙" },
+  ["ど"]={ "と","゙" },
+  ["ば"]={ "は","゙" },
+  ["ぱ"]={ "は","゚" },
+  ["び"]={ "ひ","゙" },
+  ["ぴ"]={ "ひ","゚" },
+  ["ぶ"]={ "ふ","゙" },
+  ["ぷ"]={ "ふ","゚" },
+  ["べ"]={ "へ","゙" },
+  ["ぺ"]={ "へ","゚" },
+  ["ぼ"]={ "ほ","゙" },
+  ["ぽ"]={ "ほ","゚" },
+  ["ゔ"]={ "う","゙" },
+  ["ゞ"]={ "ゝ","゙" },
+  ["ガ"]={ "カ","゙" },
+  ["ギ"]={ "キ","゙" },
+  ["グ"]={ "ク","゙" },
+  ["ゲ"]={ "ケ","゙" },
+  ["ゴ"]={ "コ","゙" },
+  ["ザ"]={ "サ","゙" },
+  ["ジ"]={ "シ","゙" },
+  ["ズ"]={ "ス","゙" },
+  ["ゼ"]={ "セ","゙" },
+  ["ゾ"]={ "ソ","゙" },
+  ["ダ"]={ "タ","゙" },
+  ["ヂ"]={ "チ","゙" },
+  ["ヅ"]={ "ツ","゙" },
+  ["デ"]={ "テ","゙" },
+  ["ド"]={ "ト","゙" },
+  ["バ"]={ "ハ","゙" },
+  ["パ"]={ "ハ","゚" },
+  ["ビ"]={ "ヒ","゙" },
+  ["ピ"]={ "ヒ","゚" },
+  ["ブ"]={ "フ","゙" },
+  ["プ"]={ "フ","゚" },
+  ["ベ"]={ "ヘ","゙" },
+  ["ペ"]={ "ヘ","゚" },
+  ["ボ"]={ "ホ","゙" },
+  ["ポ"]={ "ホ","゚" },
+  ["ヴ"]={ "ウ","゙" },
+  ["ヷ"]={ "ワ","゙" },
+  ["ヸ"]={ "ヰ","゙" },
+  ["ヹ"]={ "ヱ","゙" },
+  ["ヺ"]={ "ヲ","゙" },
+  ["ヾ"]={ "ヽ","゙" },
+  ["יִ"]={ "י","ִ" },
+  ["ײַ"]={ "ײ","ַ" },
+  ["שׁ"]={ "ש","ׁ" },
+  ["שׂ"]={ "ש","ׂ" },
+  ["שּׁ"]={ "שּ","ׁ" },
+  ["שּׂ"]={ "שּ","ׂ" },
+  ["אַ"]={ "א","ַ" },
+  ["אָ"]={ "א","ָ" },
+  ["אּ"]={ "א","ּ" },
+  ["בּ"]={ "ב","ּ" },
+  ["גּ"]={ "ג","ּ" },
+  ["דּ"]={ "ד","ּ" },
+  ["הּ"]={ "ה","ּ" },
+  ["וּ"]={ "ו","ּ" },
+  ["זּ"]={ "ז","ּ" },
+  ["טּ"]={ "ט","ּ" },
+  ["יּ"]={ "י","ּ" },
+  ["ךּ"]={ "ך","ּ" },
+  ["כּ"]={ "כ","ּ" },
+  ["לּ"]={ "ל","ּ" },
+  ["מּ"]={ "מ","ּ" },
+  ["נּ"]={ "נ","ּ" },
+  ["סּ"]={ "ס","ּ" },
+  ["ףּ"]={ "ף","ּ" },
+  ["פּ"]={ "פ","ּ" },
+  ["צּ"]={ "צ","ּ" },
+  ["קּ"]={ "ק","ּ" },
+  ["רּ"]={ "ר","ּ" },
+  ["שּ"]={ "ש","ּ" },
+  ["תּ"]={ "ת","ּ" },
+  ["וֹ"]={ "ו","ֹ" },
+  ["בֿ"]={ "ב","ֿ" },
+  ["כֿ"]={ "כ","ֿ" },
+  ["פֿ"]={ "פ","ֿ" },
+  ["𑂚"]={ "𑂙","𑂺" },
+  ["𑂜"]={ "𑂛","𑂺" },
+  ["𑂫"]={ "𑂥","𑂺" },
+  ["𑄮"]={ "𑄱","𑄧" },
+  ["𑄯"]={ "𑄲","𑄧" },
+  ["𑍋"]={ "𑍇","𑌾" },
+  ["𑍌"]={ "𑍇","𑍗" },
+  ["𑒻"]={ "𑒹","𑒺" },
+  ["𑒼"]={ "𑒹","𑒰" },
+  ["𑒾"]={ "𑒹","𑒽" },
+  ["𑖺"]={ "𑖸","𑖯" },
+  ["𑖻"]={ "𑖹","𑖯" },
+  ["𝅗𝅥"]={ "𝅗","𝅥" },
+  ["𝅘𝅥"]={ "𝅘","𝅥" },
+  ["𝅘𝅥𝅮"]={ "𝅘𝅥","𝅮" },
+  ["𝅘𝅥𝅯"]={ "𝅘𝅥","𝅯" },
+  ["𝅘𝅥𝅰"]={ "𝅘𝅥","𝅰" },
+  ["𝅘𝅥𝅱"]={ "𝅘𝅥","𝅱" },
+  ["𝅘𝅥𝅲"]={ "𝅘𝅥","𝅲" },
+  ["𝆹𝅥"]={ "𝆹","𝅥" },
+  ["𝆺𝅥"]={ "𝆺","𝅥" },
+  ["𝆹𝅥𝅮"]={ "𝆹𝅥","𝅮" },
+  ["𝆺𝅥𝅮"]={ "𝆺𝅥","𝅮" },
+  ["𝆹𝅥𝅯"]={ "𝆹𝅥","𝅯" },
+  ["𝆺𝅥𝅯"]={ "𝆺𝅥","𝅯" },
+  },
+ },
+ },
+ ["name"]="collapse",
+ ["prepend"]=true,
+ ["type"]="ligature",
+}
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-gbn']={
+  version=1.001,
+  comment="companion to luatex-*.tex",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+if context then
+  texio.write_nl("fatal error: this module is not for context")
+  os.exit()
+end
+local fonts=fonts
+local nodes=nodes
+local nuts=nodes.nuts 
+local traverse_id=nuts.traverse_id
+local flush_node=nuts.flush_node
+local glyph_code=nodes.nodecodes.glyph
+local disc_code=nodes.nodecodes.disc
+local tonode=nuts.tonode
+local tonut=nuts.tonut
+local getfont=nuts.getfont
+local getchar=nuts.getchar
+local getid=nuts.getid
+local getboth=nuts.getboth
+local getprev=nuts.getprev
+local getnext=nuts.getnext
+local getdisc=nuts.getdisc
+local setchar=nuts.setchar
+local setlink=nuts.setlink
+local setprev=nuts.setprev
+local n_ligaturing=node.ligaturing
+local n_kerning=node.kerning
+local ligaturing=nuts.ligaturing
+local kerning=nuts.kerning
+local basemodepass=true
+local function l_warning() texio.write_nl("warning: node.ligaturing called directly") l_warning=nil end
+local function k_warning() texio.write_nl("warning: node.kerning called directly")  k_warning=nil end
+function node.ligaturing(...)
+  if basemodepass and l_warning then
+    l_warning()
+  end
+  return n_ligaturing(...)
+end
+function node.kerning(...)
+  if basemodepass and k_warning then
+    k_warning()
+  end
+  return n_kerning(...)
+end
+function nodes.handlers.setbasemodepass(v)
+  basemodepass=v
+end
+function nodes.handlers.nodepass(head,groupcode,size,packtype,direction)
+  local fontdata=fonts.hashes.identifiers
+  if fontdata then
+    local nuthead=tonut(head)
+    local usedfonts={}
+    local basefonts={}
+    local prevfont=nil
+    local basefont=nil
+    local variants=nil
+    local redundant=nil
+    local nofused=0
+    for n in traverse_id(glyph_code,nuthead) do
+      local font=getfont(n)
+      if font~=prevfont then
+        if basefont then
+          basefont[2]=getprev(n)
+        end
+        prevfont=font
+        local used=usedfonts[font]
+        if not used then
+          local tfmdata=fontdata[font] 
+          if tfmdata then
+            local shared=tfmdata.shared 
+            if shared then
+              local processors=shared.processes
+              if processors and #processors>0 then
+                usedfonts[font]=processors
+                nofused=nofused+1
+              elseif basemodepass then
+                basefont={ n,nil }
+                basefonts[#basefonts+1]=basefont
+              end
+            end
+            local resources=tfmdata.resources
+            variants=resources and resources.variants
+            variants=variants and next(variants) and variants or false
+          end
+        else
+          local tfmdata=fontdata[prevfont]
+          if tfmdata then
+            local resources=tfmdata.resources
+            variants=resources and resources.variants
+            variants=variants and next(variants) and variants or false
+          end
+        end
+      end
+      if variants then
+        local char=getchar(n)
+        if char>=0xFE00 and (char<=0xFE0F or (char>=0xE0100 and char<=0xE01EF)) then
+          local hash=variants[char]
+          if hash then
+            local p=getprev(n)
+            if p and getid(p)==glyph_code then
+              local variant=hash[getchar(p)]
+              if variant then
+                setchar(p,variant)
+              end
+            end
+          end
+          if not redundant then
+            redundant={ n }
+          else
+            redundant[#redundant+1]=n
+          end
+        end
+      end
+    end
+    local nofbasefonts=#basefonts
+    if redundant then
+      for i=1,#redundant do
+        local r=redundant[i]
+        local p,n=getboth(r)
+        if r==nuthead then
+          nuthead=n
+          setprev(n)
+        else
+          setlink(p,n)
+        end
+        if nofbasefonts>0 then
+          for i=1,nofbasefonts do
+            local bi=basefonts[i]
+            if r==bi[1] then
+              bi[1]=n
+            end
+            if r==bi[2] then
+              bi[2]=n
+            end
+          end
+        end
+        flush_node(r)
+      end
+    end
+    for d in traverse_id(disc_code,nuthead) do
+      local _,_,r=getdisc(d)
+      if r then
+        for n in traverse_id(glyph_code,r) do
+          local font=getfont(n)
+          if font~=prevfont then
+            prevfont=font
+            local used=usedfonts[font]
+            if not used then
+              local tfmdata=fontdata[font] 
+              if tfmdata then
+                local shared=tfmdata.shared 
+                if shared then
+                  local processors=shared.processes
+                  if processors and #processors>0 then
+                    usedfonts[font]=processors
+                    nofused=nofused+1
+                  end
+                end
+              end
+            end
+          end
+        end
+      end
+    end
+    if next(usedfonts) then
+      for font,processors in next,usedfonts do
+        for i=1,#processors do
+          head=processors[i](head,font,0,direction,nofused) or head
+        end
+      end
+    end
+    if basemodepass and nofbasefonts>0 then
+      for i=1,nofbasefonts do
+        local range=basefonts[i]
+        local start=range[1]
+        local stop=range[2]
+        if start then
+          local front=nuthead==start
+          local prev,next
+          if stop then
+            next=getnext(stop)
+            start,stop=ligaturing(start,stop)
+            start,stop=kerning(start,stop)
+          else
+            prev=getprev(start)
+            start=ligaturing(start)
+            start=kerning(start)
+          end
+          if prev then
+            setlink(prev,start)
+          end
+          if next then
+            setlink(stop,next)
+          end
+          if front and nuthead~=start then
+            head=tonode(start)
+          end
+        end
+      end
+    end
+    return head,true
+  else
+    return head,false
+  end
+end
+function nodes.handlers.basepass(head)
+  if not basemodepass then
+    head=n_ligaturing(head)
+    head=n_kerning(head)
+  end
+  return head,true
+end
+local nodepass=nodes.handlers.nodepass
+local basepass=nodes.handlers.basepass
+local injectpass=nodes.injections.handler
+local protectpass=nodes.handlers.protectglyphs
+function nodes.simple_font_handler(head,groupcode,size,packtype,direction)
+  if head then
+    head=nodepass(head,groupcode,size,packtype,direction)
+    head=injectpass(head)
+    if not basemodepass then
+      head=basepass(head)
+    end
+    protectpass(head)
+    return head,true
+  else
+    return head,false
+  end
+end
+
+end -- closure
diff --git a/Master/texmf-dist/tex/luatex/fontloader-luaotfload/fontloader-reference-2017-08-18.lua b/Master/texmf-dist/tex/luatex/fontloader-luaotfload/fontloader-reference-2017-08-18.lua
new file mode 100644
index 00000000000..ad93718296b
--- /dev/null
+++ b/Master/texmf-dist/tex/luatex/fontloader-luaotfload/fontloader-reference-2017-08-18.lua
@@ -0,0 +1,34366 @@
+-- merged file : c:/data/develop/context/sources/luatex-fonts-merged.lua
+-- parent file : c:/data/develop/context/sources/luatex-fonts.lua
+-- merge date  : 08/15/17 12:35:38
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['l-lua']={
+  version=1.001,
+  comment="companion to luat-lib.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+_MAJORVERSION,_MINORVERSION=string.match(_VERSION,"^[^%d]+(%d+)%.(%d+).*$")
+_MAJORVERSION=tonumber(_MAJORVERSION) or 5
+_MINORVERSION=tonumber(_MINORVERSION) or 1
+_LUAVERSION=_MAJORVERSION+_MINORVERSION/10
+if _LUAVERSION<5.2 and jit then
+  _MINORVERSION=2
+  _LUAVERSION=5.2
+end
+if not lpeg then
+  lpeg=require("lpeg")
+end
+if loadstring then
+  local loadnormal=load
+  function load(first,...)
+    if type(first)=="string" then
+      return loadstring(first,...)
+    else
+      return loadnormal(first,...)
+    end
+  end
+else
+  loadstring=load
+end
+if not ipairs then
+  local function iterate(a,i)
+    i=i+1
+    local v=a[i]
+    if v~=nil then
+      return i,v 
+    end
+  end
+  function ipairs(a)
+    return iterate,a,0
+  end
+end
+if not pairs then
+  function pairs(t)
+    return next,t 
+  end
+end
+if not table.unpack then
+  table.unpack=_G.unpack
+elseif not unpack then
+  _G.unpack=table.unpack
+end
+if not package.loaders then 
+  package.loaders=package.searchers
+end
+local print,select,tostring=print,select,tostring
+local inspectors={}
+function setinspector(kind,inspector) 
+  inspectors[kind]=inspector
+end
+function inspect(...) 
+  for s=1,select("#",...) do
+    local value=select(s,...)
+    if value==nil then
+      print("nil")
+    else
+      local done=false
+      local kind=type(value)
+      local inspector=inspectors[kind]
+      if inspector then
+        done=inspector(value)
+        if done then
+          break
+        end
+      end
+      for kind,inspector in next,inspectors do
+        done=inspector(value)
+        if done then
+          break
+        end
+      end
+      if not done then
+        print(tostring(value))
+      end
+    end
+  end
+end
+local dummy=function() end
+function optionalrequire(...)
+  local ok,result=xpcall(require,dummy,...)
+  if ok then
+    return result
+  end
+end
+if lua then
+  lua.mask=load([[τεχ = 1]]) and "utf" or "ascii"
+end
+local flush=io.flush
+if flush then
+  local execute=os.execute if execute then function os.execute(...) flush() return execute(...) end end
+  local exec=os.exec  if exec  then function os.exec  (...) flush() return exec  (...) end end
+  local spawn=os.spawn  if spawn  then function os.spawn (...) flush() return spawn (...) end end
+  local popen=io.popen  if popen  then function io.popen (...) flush() return popen (...) end end
+end
+FFISUPPORTED=type(ffi)=="table" and ffi.os~="" and ffi.arch~="" and ffi.load
+if not FFISUPPORTED then
+  local okay;okay,ffi=pcall(require,"ffi")
+  FFISUPPORTED=type(ffi)=="table" and ffi.os~="" and ffi.arch~="" and ffi.load
+end
+if not FFISUPPORTED then
+  ffi=nil
+elseif not ffi.number then
+  ffi.number=tonumber
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['l-lpeg']={
+  version=1.001,
+  comment="companion to luat-lib.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+lpeg=require("lpeg") 
+local lpeg=lpeg
+if not lpeg.print then function lpeg.print(...) print(lpeg.pcode(...)) end end
+local type,next,tostring=type,next,tostring
+local byte,char,gmatch,format=string.byte,string.char,string.gmatch,string.format
+local floor=math.floor
+local P,R,S,V,Ct,C,Cs,Cc,Cp,Cmt=lpeg.P,lpeg.R,lpeg.S,lpeg.V,lpeg.Ct,lpeg.C,lpeg.Cs,lpeg.Cc,lpeg.Cp,lpeg.Cmt
+local lpegtype,lpegmatch,lpegprint=lpeg.type,lpeg.match,lpeg.print
+if setinspector then
+  setinspector("lpeg",function(v) if lpegtype(v) then lpegprint(v) return true end end)
+end
+lpeg.patterns=lpeg.patterns or {} 
+local patterns=lpeg.patterns
+local anything=P(1)
+local endofstring=P(-1)
+local alwaysmatched=P(true)
+patterns.anything=anything
+patterns.endofstring=endofstring
+patterns.beginofstring=alwaysmatched
+patterns.alwaysmatched=alwaysmatched
+local sign=S('+-')
+local zero=P('0')
+local digit=R('09')
+local octdigit=R("07")
+local lowercase=R("az")
+local uppercase=R("AZ")
+local underscore=P("_")
+local hexdigit=digit+lowercase+uppercase
+local cr,lf,crlf=P("\r"),P("\n"),P("\r\n")
+local newline=P("\r")*(P("\n")+P(true))+P("\n") 
+local escaped=P("\\")*anything
+local squote=P("'")
+local dquote=P('"')
+local space=P(" ")
+local period=P(".")
+local comma=P(",")
+local utfbom_32_be=P('\000\000\254\255') 
+local utfbom_32_le=P('\255\254\000\000') 
+local utfbom_16_be=P('\254\255')     
+local utfbom_16_le=P('\255\254')     
+local utfbom_8=P('\239\187\191')   
+local utfbom=utfbom_32_be+utfbom_32_le+utfbom_16_be+utfbom_16_le+utfbom_8
+local utftype=utfbom_32_be*Cc("utf-32-be")+utfbom_32_le*Cc("utf-32-le")+utfbom_16_be*Cc("utf-16-be")+utfbom_16_le*Cc("utf-16-le")+utfbom_8*Cc("utf-8")+alwaysmatched*Cc("utf-8") 
+local utfstricttype=utfbom_32_be*Cc("utf-32-be")+utfbom_32_le*Cc("utf-32-le")+utfbom_16_be*Cc("utf-16-be")+utfbom_16_le*Cc("utf-16-le")+utfbom_8*Cc("utf-8")
+local utfoffset=utfbom_32_be*Cc(4)+utfbom_32_le*Cc(4)+utfbom_16_be*Cc(2)+utfbom_16_le*Cc(2)+utfbom_8*Cc(3)+Cc(0)
+local utf8next=R("\128\191")
+patterns.utfbom_32_be=utfbom_32_be
+patterns.utfbom_32_le=utfbom_32_le
+patterns.utfbom_16_be=utfbom_16_be
+patterns.utfbom_16_le=utfbom_16_le
+patterns.utfbom_8=utfbom_8
+patterns.utf_16_be_nl=P("\000\r\000\n")+P("\000\r")+P("\000\n") 
+patterns.utf_16_le_nl=P("\r\000\n\000")+P("\r\000")+P("\n\000") 
+patterns.utf_32_be_nl=P("\000\000\000\r\000\000\000\n")+P("\000\000\000\r")+P("\000\000\000\n")
+patterns.utf_32_le_nl=P("\r\000\000\000\n\000\000\000")+P("\r\000\000\000")+P("\n\000\000\000")
+patterns.utf8one=R("\000\127")
+patterns.utf8two=R("\194\223")*utf8next
+patterns.utf8three=R("\224\239")*utf8next*utf8next
+patterns.utf8four=R("\240\244")*utf8next*utf8next*utf8next
+patterns.utfbom=utfbom
+patterns.utftype=utftype
+patterns.utfstricttype=utfstricttype
+patterns.utfoffset=utfoffset
+local utf8char=patterns.utf8one+patterns.utf8two+patterns.utf8three+patterns.utf8four
+local validutf8char=utf8char^0*endofstring*Cc(true)+Cc(false)
+local utf8character=P(1)*R("\128\191")^0 
+patterns.utf8=utf8char
+patterns.utf8char=utf8char
+patterns.utf8character=utf8character 
+patterns.validutf8=validutf8char
+patterns.validutf8char=validutf8char
+local eol=S("\n\r")
+local spacer=S(" \t\f\v") 
+local whitespace=eol+spacer
+local nonspacer=1-spacer
+local nonwhitespace=1-whitespace
+patterns.eol=eol
+patterns.spacer=spacer
+patterns.whitespace=whitespace
+patterns.nonspacer=nonspacer
+patterns.nonwhitespace=nonwhitespace
+local stripper=spacer^0*C((spacer^0*nonspacer^1)^0)   
+local fullstripper=whitespace^0*C((whitespace^0*nonwhitespace^1)^0)
+local collapser=Cs(spacer^0/""*nonspacer^0*((spacer^0/" "*nonspacer^1)^0))
+local nospacer=Cs((whitespace^1/""+nonwhitespace^1)^0)
+local b_collapser=Cs(whitespace^0/""*(nonwhitespace^1+whitespace^1/" ")^0)
+local e_collapser=Cs((whitespace^1*P(-1)/""+nonwhitespace^1+whitespace^1/" ")^0)
+local m_collapser=Cs((nonwhitespace^1+whitespace^1/" ")^0)
+local b_stripper=Cs(spacer^0/""*(nonspacer^1+spacer^1/" ")^0)
+local e_stripper=Cs((spacer^1*P(-1)/""+nonspacer^1+spacer^1/" ")^0)
+local m_stripper=Cs((nonspacer^1+spacer^1/" ")^0)
+patterns.stripper=stripper
+patterns.fullstripper=fullstripper
+patterns.collapser=collapser
+patterns.nospacer=nospacer
+patterns.b_collapser=b_collapser
+patterns.m_collapser=m_collapser
+patterns.e_collapser=e_collapser
+patterns.b_stripper=b_stripper
+patterns.m_stripper=m_stripper
+patterns.e_stripper=e_stripper
+patterns.lowercase=lowercase
+patterns.uppercase=uppercase
+patterns.letter=patterns.lowercase+patterns.uppercase
+patterns.space=space
+patterns.tab=P("\t")
+patterns.spaceortab=patterns.space+patterns.tab
+patterns.newline=newline
+patterns.emptyline=newline^1
+patterns.equal=P("=")
+patterns.comma=comma
+patterns.commaspacer=comma*spacer^0
+patterns.period=period
+patterns.colon=P(":")
+patterns.semicolon=P(";")
+patterns.underscore=underscore
+patterns.escaped=escaped
+patterns.squote=squote
+patterns.dquote=dquote
+patterns.nosquote=(escaped+(1-squote))^0
+patterns.nodquote=(escaped+(1-dquote))^0
+patterns.unsingle=(squote/"")*patterns.nosquote*(squote/"") 
+patterns.undouble=(dquote/"")*patterns.nodquote*(dquote/"") 
+patterns.unquoted=patterns.undouble+patterns.unsingle 
+patterns.unspacer=((patterns.spacer^1)/"")^0
+patterns.singlequoted=squote*patterns.nosquote*squote
+patterns.doublequoted=dquote*patterns.nodquote*dquote
+patterns.quoted=patterns.doublequoted+patterns.singlequoted
+patterns.digit=digit
+patterns.octdigit=octdigit
+patterns.hexdigit=hexdigit
+patterns.sign=sign
+patterns.cardinal=digit^1
+patterns.integer=sign^-1*digit^1
+patterns.unsigned=digit^0*period*digit^1
+patterns.float=sign^-1*patterns.unsigned
+patterns.cunsigned=digit^0*comma*digit^1
+patterns.cpunsigned=digit^0*(period+comma)*digit^1
+patterns.cfloat=sign^-1*patterns.cunsigned
+patterns.cpfloat=sign^-1*patterns.cpunsigned
+patterns.number=patterns.float+patterns.integer
+patterns.cnumber=patterns.cfloat+patterns.integer
+patterns.cpnumber=patterns.cpfloat+patterns.integer
+patterns.oct=zero*octdigit^1
+patterns.octal=patterns.oct
+patterns.HEX=zero*P("X")*(digit+uppercase)^1
+patterns.hex=zero*P("x")*(digit+lowercase)^1
+patterns.hexadecimal=zero*S("xX")*hexdigit^1
+patterns.hexafloat=sign^-1*zero*S("xX")*(hexdigit^0*period*hexdigit^1+hexdigit^1*period*hexdigit^0+hexdigit^1)*(S("pP")*sign^-1*hexdigit^1)^-1
+patterns.decafloat=sign^-1*(digit^0*period*digit^1+digit^1*period*digit^0+digit^1)*S("eE")*sign^-1*digit^1
+patterns.propername=(uppercase+lowercase+underscore)*(uppercase+lowercase+underscore+digit)^0*endofstring
+patterns.somecontent=(anything-newline-space)^1 
+patterns.beginline=#(1-newline)
+patterns.longtostring=Cs(whitespace^0/""*((patterns.quoted+nonwhitespace^1+whitespace^1/""*(P(-1)+Cc(" ")))^0))
+local function anywhere(pattern) 
+  return P { P(pattern)+1*V(1) }
+end
+lpeg.anywhere=anywhere
+function lpeg.instringchecker(p)
+  p=anywhere(p)
+  return function(str)
+    return lpegmatch(p,str) and true or false
+  end
+end
+function lpeg.splitter(pattern,action)
+  return (((1-P(pattern))^1)/action+1)^0
+end
+function lpeg.tsplitter(pattern,action)
+  return Ct((((1-P(pattern))^1)/action+1)^0)
+end
+local splitters_s,splitters_m,splitters_t={},{},{}
+local function splitat(separator,single)
+  local splitter=(single and splitters_s[separator]) or splitters_m[separator]
+  if not splitter then
+    separator=P(separator)
+    local other=C((1-separator)^0)
+    if single then
+      local any=anything
+      splitter=other*(separator*C(any^0)+"") 
+      splitters_s[separator]=splitter
+    else
+      splitter=other*(separator*other)^0
+      splitters_m[separator]=splitter
+    end
+  end
+  return splitter
+end
+local function tsplitat(separator)
+  local splitter=splitters_t[separator]
+  if not splitter then
+    splitter=Ct(splitat(separator))
+    splitters_t[separator]=splitter
+  end
+  return splitter
+end
+lpeg.splitat=splitat
+lpeg.tsplitat=tsplitat
+function string.splitup(str,separator)
+  if not separator then
+    separator=","
+  end
+  return lpegmatch(splitters_m[separator] or splitat(separator),str)
+end
+local cache={}
+function lpeg.split(separator,str)
+  local c=cache[separator]
+  if not c then
+    c=tsplitat(separator)
+    cache[separator]=c
+  end
+  return lpegmatch(c,str)
+end
+function string.split(str,separator)
+  if separator then
+    local c=cache[separator]
+    if not c then
+      c=tsplitat(separator)
+      cache[separator]=c
+    end
+    return lpegmatch(c,str)
+  else
+    return { str }
+  end
+end
+local spacing=patterns.spacer^0*newline 
+local empty=spacing*Cc("")
+local nonempty=Cs((1-spacing)^1)*spacing^-1
+local content=(empty+nonempty)^1
+patterns.textline=content
+local linesplitter=tsplitat(newline)
+patterns.linesplitter=linesplitter
+function string.splitlines(str)
+  return lpegmatch(linesplitter,str)
+end
+local cache={}
+function lpeg.checkedsplit(separator,str)
+  local c=cache[separator]
+  if not c then
+    separator=P(separator)
+    local other=C((1-separator)^1)
+    c=Ct(separator^0*other*(separator^1*other)^0)
+    cache[separator]=c
+  end
+  return lpegmatch(c,str)
+end
+function string.checkedsplit(str,separator)
+  local c=cache[separator]
+  if not c then
+    separator=P(separator)
+    local other=C((1-separator)^1)
+    c=Ct(separator^0*other*(separator^1*other)^0)
+    cache[separator]=c
+  end
+  return lpegmatch(c,str)
+end
+local function f2(s) local c1,c2=byte(s,1,2) return  c1*64+c2-12416 end
+local function f3(s) local c1,c2,c3=byte(s,1,3) return (c1*64+c2)*64+c3-925824 end
+local function f4(s) local c1,c2,c3,c4=byte(s,1,4) return ((c1*64+c2)*64+c3)*64+c4-63447168 end
+local utf8byte=patterns.utf8one/byte+patterns.utf8two/f2+patterns.utf8three/f3+patterns.utf8four/f4
+patterns.utf8byte=utf8byte
+local cache={}
+function lpeg.stripper(str)
+  if type(str)=="string" then
+    local s=cache[str]
+    if not s then
+      s=Cs(((S(str)^1)/""+1)^0)
+      cache[str]=s
+    end
+    return s
+  else
+    return Cs(((str^1)/""+1)^0)
+  end
+end
+local cache={}
+function lpeg.keeper(str)
+  if type(str)=="string" then
+    local s=cache[str]
+    if not s then
+      s=Cs((((1-S(str))^1)/""+1)^0)
+      cache[str]=s
+    end
+    return s
+  else
+    return Cs((((1-str)^1)/""+1)^0)
+  end
+end
+function lpeg.frontstripper(str) 
+  return (P(str)+P(true))*Cs(anything^0)
+end
+function lpeg.endstripper(str) 
+  return Cs((1-P(str)*endofstring)^0)
+end
+function lpeg.replacer(one,two,makefunction,isutf) 
+  local pattern
+  local u=isutf and utf8char or 1
+  if type(one)=="table" then
+    local no=#one
+    local p=P(false)
+    if no==0 then
+      for k,v in next,one do
+        p=p+P(k)/v
+      end
+      pattern=Cs((p+u)^0)
+    elseif no==1 then
+      local o=one[1]
+      one,two=P(o[1]),o[2]
+      pattern=Cs((one/two+u)^0)
+    else
+      for i=1,no do
+        local o=one[i]
+        p=p+P(o[1])/o[2]
+      end
+      pattern=Cs((p+u)^0)
+    end
+  else
+    pattern=Cs((P(one)/(two or "")+u)^0)
+  end
+  if makefunction then
+    return function(str)
+      return lpegmatch(pattern,str)
+    end
+  else
+    return pattern
+  end
+end
+function lpeg.finder(lst,makefunction,isutf) 
+  local pattern
+  if type(lst)=="table" then
+    pattern=P(false)
+    if #lst==0 then
+      for k,v in next,lst do
+        pattern=pattern+P(k) 
+      end
+    else
+      for i=1,#lst do
+        pattern=pattern+P(lst[i])
+      end
+    end
+  else
+    pattern=P(lst)
+  end
+  if isutf then
+    pattern=((utf8char or 1)-pattern)^0*pattern
+  else
+    pattern=(1-pattern)^0*pattern
+  end
+  if makefunction then
+    return function(str)
+      return lpegmatch(pattern,str)
+    end
+  else
+    return pattern
+  end
+end
+local splitters_f,splitters_s={},{}
+function lpeg.firstofsplit(separator) 
+  local splitter=splitters_f[separator]
+  if not splitter then
+    local pattern=P(separator)
+    splitter=C((1-pattern)^0)
+    splitters_f[separator]=splitter
+  end
+  return splitter
+end
+function lpeg.secondofsplit(separator) 
+  local splitter=splitters_s[separator]
+  if not splitter then
+    local pattern=P(separator)
+    splitter=(1-pattern)^0*pattern*C(anything^0)
+    splitters_s[separator]=splitter
+  end
+  return splitter
+end
+local splitters_s,splitters_p={},{}
+function lpeg.beforesuffix(separator) 
+  local splitter=splitters_s[separator]
+  if not splitter then
+    local pattern=P(separator)
+    splitter=C((1-pattern)^0)*pattern*endofstring
+    splitters_s[separator]=splitter
+  end
+  return splitter
+end
+function lpeg.afterprefix(separator) 
+  local splitter=splitters_p[separator]
+  if not splitter then
+    local pattern=P(separator)
+    splitter=pattern*C(anything^0)
+    splitters_p[separator]=splitter
+  end
+  return splitter
+end
+function lpeg.balancer(left,right)
+  left,right=P(left),P(right)
+  return P { left*((1-left-right)+V(1))^0*right }
+end
+local nany=utf8char/""
+function lpeg.counter(pattern)
+  pattern=Cs((P(pattern)/" "+nany)^0)
+  return function(str)
+    return #lpegmatch(pattern,str)
+  end
+end
+utf=utf or (unicode and unicode.utf8) or {}
+local utfcharacters=utf and utf.characters or string.utfcharacters
+local utfgmatch=utf and utf.gmatch
+local utfchar=utf and utf.char
+lpeg.UP=lpeg.P
+if utfcharacters then
+  function lpeg.US(str)
+    local p=P(false)
+    for uc in utfcharacters(str) do
+      p=p+P(uc)
+    end
+    return p
+  end
+elseif utfgmatch then
+  function lpeg.US(str)
+    local p=P(false)
+    for uc in utfgmatch(str,".") do
+      p=p+P(uc)
+    end
+    return p
+  end
+else
+  function lpeg.US(str)
+    local p=P(false)
+    local f=function(uc)
+      p=p+P(uc)
+    end
+    lpegmatch((utf8char/f)^0,str)
+    return p
+  end
+end
+local range=utf8byte*utf8byte+Cc(false) 
+function lpeg.UR(str,more)
+  local first,last
+  if type(str)=="number" then
+    first=str
+    last=more or first
+  else
+    first,last=lpegmatch(range,str)
+    if not last then
+      return P(str)
+    end
+  end
+  if first==last then
+    return P(str)
+  elseif utfchar and (last-first<8) then 
+    local p=P(false)
+    for i=first,last do
+      p=p+P(utfchar(i))
+    end
+    return p 
+  else
+    local f=function(b)
+      return b>=first and b<=last
+    end
+    return utf8byte/f 
+  end
+end
+function lpeg.is_lpeg(p)
+  return p and lpegtype(p)=="pattern"
+end
+function lpeg.oneof(list,...) 
+  if type(list)~="table" then
+    list={ list,... }
+  end
+  local p=P(list[1])
+  for l=2,#list do
+    p=p+P(list[l])
+  end
+  return p
+end
+local sort=table.sort
+local function copyindexed(old)
+  local new={}
+  for i=1,#old do
+    new[i]=old
+  end
+  return new
+end
+local function sortedkeys(tab)
+  local keys,s={},0
+  for key,_ in next,tab do
+    s=s+1
+    keys[s]=key
+  end
+  sort(keys)
+  return keys
+end
+function lpeg.append(list,pp,delayed,checked)
+  local p=pp
+  if #list>0 then
+    local keys=copyindexed(list)
+    sort(keys)
+    for i=#keys,1,-1 do
+      local k=keys[i]
+      if p then
+        p=P(k)+p
+      else
+        p=P(k)
+      end
+    end
+  elseif delayed then 
+    local keys=sortedkeys(list)
+    if p then
+      for i=1,#keys,1 do
+        local k=keys[i]
+        local v=list[k]
+        p=P(k)/list+p
+      end
+    else
+      for i=1,#keys do
+        local k=keys[i]
+        local v=list[k]
+        if p then
+          p=P(k)+p
+        else
+          p=P(k)
+        end
+      end
+      if p then
+        p=p/list
+      end
+    end
+  elseif checked then
+    local keys=sortedkeys(list)
+    for i=1,#keys do
+      local k=keys[i]
+      local v=list[k]
+      if p then
+        if k==v then
+          p=P(k)+p
+        else
+          p=P(k)/v+p
+        end
+      else
+        if k==v then
+          p=P(k)
+        else
+          p=P(k)/v
+        end
+      end
+    end
+  else
+    local keys=sortedkeys(list)
+    for i=1,#keys do
+      local k=keys[i]
+      local v=list[k]
+      if p then
+        p=P(k)/v+p
+      else
+        p=P(k)/v
+      end
+    end
+  end
+  return p
+end
+local p_false=P(false)
+local p_true=P(true)
+local function make(t,rest)
+  local p=p_false
+  local keys=sortedkeys(t)
+  for i=1,#keys do
+    local k=keys[i]
+    if k~="" then
+      local v=t[k]
+      if v==true then
+        p=p+P(k)*p_true
+      elseif v==false then
+      else
+        p=p+P(k)*make(v,v[""])
+      end
+    end
+  end
+  if rest then
+    p=p+p_true
+  end
+  return p
+end
+local function collapse(t,x)
+  if type(t)~="table" then
+    return t,x
+  else
+    local n=next(t)
+    if n==nil then
+      return t,x
+    elseif next(t,n)==nil then
+      local k=n
+      local v=t[k]
+      if type(v)=="table" then
+        return collapse(v,x..k)
+      else
+        return v,x..k
+      end
+    else
+      local tt={}
+      for k,v in next,t do
+        local vv,kk=collapse(v,k)
+        tt[kk]=vv
+      end
+      return tt,x
+    end
+  end
+end
+function lpeg.utfchartabletopattern(list) 
+  local tree={}
+  local n=#list
+  if n==0 then
+    for s in next,list do
+      local t=tree
+      local p,pk
+      for c in gmatch(s,".") do
+        if t==true then
+          t={ [c]=true,[""]=true }
+          p[pk]=t
+          p=t
+          t=false
+        elseif t==false then
+          t={ [c]=false }
+          p[pk]=t
+          p=t
+          t=false
+        else
+          local tc=t[c]
+          if not tc then
+            tc=false
+            t[c]=false
+          end
+          p=t
+          t=tc
+        end
+        pk=c
+      end
+      if t==false then
+        p[pk]=true
+      elseif t==true then
+      else
+        t[""]=true
+      end
+    end
+  else
+    for i=1,n do
+      local s=list[i]
+      local t=tree
+      local p,pk
+      for c in gmatch(s,".") do
+        if t==true then
+          t={ [c]=true,[""]=true }
+          p[pk]=t
+          p=t
+          t=false
+        elseif t==false then
+          t={ [c]=false }
+          p[pk]=t
+          p=t
+          t=false
+        else
+          local tc=t[c]
+          if not tc then
+            tc=false
+            t[c]=false
+          end
+          p=t
+          t=tc
+        end
+        pk=c
+      end
+      if t==false then
+        p[pk]=true
+      elseif t==true then
+      else
+        t[""]=true
+      end
+    end
+  end
+  return make(tree)
+end
+patterns.containseol=lpeg.finder(eol)
+local function nextstep(n,step,result)
+  local m=n%step   
+  local d=floor(n/step) 
+  if d>0 then
+    local v=V(tostring(step))
+    local s=result.start
+    for i=1,d do
+      if s then
+        s=v*s
+      else
+        s=v
+      end
+    end
+    result.start=s
+  end
+  if step>1 and result.start then
+    local v=V(tostring(step/2))
+    result[tostring(step)]=v*v
+  end
+  if step>0 then
+    return nextstep(m,step/2,result)
+  else
+    return result
+  end
+end
+function lpeg.times(pattern,n)
+  return P(nextstep(n,2^16,{ "start",["1"]=pattern }))
+end
+local trailingzeros=zero^0*-digit 
+local case_1=period*trailingzeros/""
+local case_2=period*(digit-trailingzeros)^1*(trailingzeros/"")
+local number=digit^1*(case_1+case_2)
+local stripper=Cs((number+1)^0)
+lpeg.patterns.stripzeros=stripper
+local byte_to_HEX={}
+local byte_to_hex={}
+local byte_to_dec={} 
+local hex_to_byte={}
+for i=0,255 do
+  local H=format("%02X",i)
+  local h=format("%02x",i)
+  local d=format("%03i",i)
+  local c=char(i)
+  byte_to_HEX[c]=H
+  byte_to_hex[c]=h
+  byte_to_dec[c]=d
+  hex_to_byte[h]=c
+  hex_to_byte[H]=c
+end
+local hextobyte=P(2)/hex_to_byte
+local bytetoHEX=P(1)/byte_to_HEX
+local bytetohex=P(1)/byte_to_hex
+local bytetodec=P(1)/byte_to_dec
+local hextobytes=Cs(hextobyte^0)
+local bytestoHEX=Cs(bytetoHEX^0)
+local bytestohex=Cs(bytetohex^0)
+local bytestodec=Cs(bytetodec^0)
+patterns.hextobyte=hextobyte
+patterns.bytetoHEX=bytetoHEX
+patterns.bytetohex=bytetohex
+patterns.bytetodec=bytetodec
+patterns.hextobytes=hextobytes
+patterns.bytestoHEX=bytestoHEX
+patterns.bytestohex=bytestohex
+patterns.bytestodec=bytestodec
+function string.toHEX(s)
+  if not s or s=="" then
+    return s
+  else
+    return lpegmatch(bytestoHEX,s)
+  end
+end
+function string.tohex(s)
+  if not s or s=="" then
+    return s
+  else
+    return lpegmatch(bytestohex,s)
+  end
+end
+function string.todec(s)
+  if not s or s=="" then
+    return s
+  else
+    return lpegmatch(bytestodec,s)
+  end
+end
+function string.tobytes(s)
+  if not s or s=="" then
+    return s
+  else
+    return lpegmatch(hextobytes,s)
+  end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['l-functions']={
+  version=1.001,
+  comment="companion to luat-lib.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+functions=functions or {}
+function functions.dummy() end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['l-string']={
+  version=1.001,
+  comment="companion to luat-lib.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local string=string
+local sub,gmatch,format,char,byte,rep,lower=string.sub,string.gmatch,string.format,string.char,string.byte,string.rep,string.lower
+local lpegmatch,patterns=lpeg.match,lpeg.patterns
+local P,S,C,Ct,Cc,Cs=lpeg.P,lpeg.S,lpeg.C,lpeg.Ct,lpeg.Cc,lpeg.Cs
+local unquoted=patterns.squote*C(patterns.nosquote)*patterns.squote+patterns.dquote*C(patterns.nodquote)*patterns.dquote
+function string.unquoted(str)
+  return lpegmatch(unquoted,str) or str
+end
+function string.quoted(str)
+  return format("%q",str) 
+end
+function string.count(str,pattern) 
+  local n=0
+  for _ in gmatch(str,pattern) do 
+    n=n+1
+  end
+  return n
+end
+function string.limit(str,n,sentinel) 
+  if #str>n then
+    sentinel=sentinel or "..."
+    return sub(str,1,(n-#sentinel))..sentinel
+  else
+    return str
+  end
+end
+local stripper=patterns.stripper
+local fullstripper=patterns.fullstripper
+local collapser=patterns.collapser
+local nospacer=patterns.nospacer
+local longtostring=patterns.longtostring
+function string.strip(str)
+  return str and lpegmatch(stripper,str) or ""
+end
+function string.fullstrip(str)
+  return str and lpegmatch(fullstripper,str) or ""
+end
+function string.collapsespaces(str)
+  return str and lpegmatch(collapser,str) or ""
+end
+function string.nospaces(str)
+  return str and lpegmatch(nospacer,str) or ""
+end
+function string.longtostring(str)
+  return str and lpegmatch(longtostring,str) or ""
+end
+local pattern=P(" ")^0*P(-1)
+function string.is_empty(str)
+  if not str or str=="" then
+    return true
+  else
+    return lpegmatch(pattern,str) and true or false
+  end
+end
+local anything=patterns.anything
+local allescapes=Cc("%")*S(".-+%?()[]*") 
+local someescapes=Cc("%")*S(".-+%()[]")  
+local matchescapes=Cc(".")*S("*?")     
+local pattern_a=Cs ((allescapes+anything )^0 )
+local pattern_b=Cs ((someescapes+matchescapes+anything )^0 )
+local pattern_c=Cs (Cc("^")*(someescapes+matchescapes+anything )^0*Cc("$") )
+function string.escapedpattern(str,simple)
+  return lpegmatch(simple and pattern_b or pattern_a,str)
+end
+function string.topattern(str,lowercase,strict)
+  if str=="" or type(str)~="string" then
+    return ".*"
+  elseif strict then
+    str=lpegmatch(pattern_c,str)
+  else
+    str=lpegmatch(pattern_b,str)
+  end
+  if lowercase then
+    return lower(str)
+  else
+    return str
+  end
+end
+function string.valid(str,default)
+  return (type(str)=="string" and str~="" and str) or default or nil
+end
+string.itself=function(s) return s end
+local pattern_c=Ct(C(1)^0) 
+local pattern_b=Ct((C(1)/byte)^0)
+function string.totable(str,bytes)
+  return lpegmatch(bytes and pattern_b or pattern_c,str)
+end
+local replacer=lpeg.replacer("@","%%") 
+function string.tformat(fmt,...)
+  return format(lpegmatch(replacer,fmt),...)
+end
+string.quote=string.quoted
+string.unquote=string.unquoted
+if not string.bytetable then
+  local limit=5000 
+  function string.bytetable(str)
+    local n=#str
+    if n>limit then
+      local t={ byte(str,1,limit) }
+      for i=limit+1,n do
+        t[i]=byte(str,i)
+      end
+      return t
+    else
+      return { byte(str,1,n) }
+    end
+  end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['l-table']={
+  version=1.001,
+  comment="companion to luat-lib.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local type,next,tostring,tonumber,select=type,next,tostring,tonumber,select
+local table,string=table,string
+local concat,sort,insert,remove=table.concat,table.sort,table.insert,table.remove
+local format,lower,dump=string.format,string.lower,string.dump
+local getmetatable,setmetatable=getmetatable,setmetatable
+local getinfo=debug.getinfo
+local lpegmatch,patterns=lpeg.match,lpeg.patterns
+local floor=math.floor
+local stripper=patterns.stripper
+function table.strip(tab)
+  local lst,l={},0
+  for i=1,#tab do
+    local s=lpegmatch(stripper,tab[i]) or ""
+    if s=="" then
+    else
+      l=l+1
+      lst[l]=s
+    end
+  end
+  return lst
+end
+function table.keys(t)
+  if t then
+    local keys,k={},0
+    for key in next,t do
+      k=k+1
+      keys[k]=key
+    end
+    return keys
+  else
+    return {}
+  end
+end
+local function compare(a,b)
+  local ta=type(a) 
+  if ta=="number" then
+    local tb=type(b) 
+    if ta==tb then
+      return a<b
+    elseif tb=="string" then
+      return tostring(a)<b
+    end
+  elseif ta=="string" then
+    local tb=type(b) 
+    if ta==tb then
+      return a<b
+    else
+      return a<tostring(b)
+    end
+  end
+  return tostring(a)<tostring(b) 
+end
+local function sortedkeys(tab)
+  if tab then
+    local srt,category,s={},0,0 
+    for key in next,tab do
+      s=s+1
+      srt[s]=key
+      if category==3 then
+      elseif category==1 then
+        if type(key)~="string" then
+          category=3
+        end
+      elseif category==2 then
+        if type(key)~="number" then
+          category=3
+        end
+      else
+        local tkey=type(key)
+        if tkey=="string" then
+          category=1
+        elseif tkey=="number" then
+          category=2
+        else
+          category=3
+        end
+      end
+    end
+    if s<2 then
+    elseif category==3 then
+      sort(srt,compare)
+    else
+      sort(srt)
+    end
+    return srt
+  else
+    return {}
+  end
+end
+local function sortedhashonly(tab)
+  if tab then
+    local srt,s={},0
+    for key in next,tab do
+      if type(key)=="string" then
+        s=s+1
+        srt[s]=key
+      end
+    end
+    if s>1 then
+      sort(srt)
+    end
+    return srt
+  else
+    return {}
+  end
+end
+local function sortedindexonly(tab)
+  if tab then
+    local srt,s={},0
+    for key in next,tab do
+      if type(key)=="number" then
+        s=s+1
+        srt[s]=key
+      end
+    end
+    if s>1 then
+      sort(srt)
+    end
+    return srt
+  else
+    return {}
+  end
+end
+local function sortedhashkeys(tab,cmp) 
+  if tab then
+    local srt,s={},0
+    for key in next,tab do
+      if key then
+        s=s+1
+        srt[s]=key
+      end
+    end
+    if s>1 then
+      sort(srt,cmp)
+    end
+    return srt
+  else
+    return {}
+  end
+end
+function table.allkeys(t)
+  local keys={}
+  for k,v in next,t do
+    for k in next,v do
+      keys[k]=true
+    end
+  end
+  return sortedkeys(keys)
+end
+table.sortedkeys=sortedkeys
+table.sortedhashonly=sortedhashonly
+table.sortedindexonly=sortedindexonly
+table.sortedhashkeys=sortedhashkeys
+local function nothing() end
+local function sortedhash(t,cmp)
+  if t then
+    local s
+    if cmp then
+      s=sortedhashkeys(t,function(a,b) return cmp(t,a,b) end)
+    else
+      s=sortedkeys(t) 
+    end
+    local m=#s
+    if m==1 then
+      return next,t
+    elseif m>0 then
+      local n=0
+      return function()
+        if n<m then
+          n=n+1
+          local k=s[n]
+          return k,t[k]
+        end
+      end
+    end
+  end
+  return nothing
+end
+table.sortedhash=sortedhash
+table.sortedpairs=sortedhash 
+function table.append(t,list)
+  local n=#t
+  for i=1,#list do
+    n=n+1
+    t[n]=list[i]
+  end
+  return t
+end
+function table.prepend(t,list)
+  local nl=#list
+  local nt=nl+#t
+  for i=#t,1,-1 do
+    t[nt]=t[i]
+    nt=nt-1
+  end
+  for i=1,#list do
+    t[i]=list[i]
+  end
+  return t
+end
+function table.merge(t,...) 
+  t=t or {}
+  for i=1,select("#",...) do
+    for k,v in next,(select(i,...)) do
+      t[k]=v
+    end
+  end
+  return t
+end
+function table.merged(...)
+  local t={}
+  for i=1,select("#",...) do
+    for k,v in next,(select(i,...)) do
+      t[k]=v
+    end
+  end
+  return t
+end
+function table.imerge(t,...)
+  local nt=#t
+  for i=1,select("#",...) do
+    local nst=select(i,...)
+    for j=1,#nst do
+      nt=nt+1
+      t[nt]=nst[j]
+    end
+  end
+  return t
+end
+function table.imerged(...)
+  local tmp,ntmp={},0
+  for i=1,select("#",...) do
+    local nst=select(i,...)
+    for j=1,#nst do
+      ntmp=ntmp+1
+      tmp[ntmp]=nst[j]
+    end
+  end
+  return tmp
+end
+local function fastcopy(old,metatabletoo) 
+  if old then
+    local new={}
+    for k,v in next,old do
+      if type(v)=="table" then
+        new[k]=fastcopy(v,metatabletoo) 
+      else
+        new[k]=v
+      end
+    end
+    if metatabletoo then
+      local mt=getmetatable(old)
+      if mt then
+        setmetatable(new,mt)
+      end
+    end
+    return new
+  else
+    return {}
+  end
+end
+local function copy(t,tables) 
+  tables=tables or {}
+  local tcopy={}
+  if not tables[t] then
+    tables[t]=tcopy
+  end
+  for i,v in next,t do 
+    if type(i)=="table" then
+      if tables[i] then
+        i=tables[i]
+      else
+        i=copy(i,tables)
+      end
+    end
+    if type(v)~="table" then
+      tcopy[i]=v
+    elseif tables[v] then
+      tcopy[i]=tables[v]
+    else
+      tcopy[i]=copy(v,tables)
+    end
+  end
+  local mt=getmetatable(t)
+  if mt then
+    setmetatable(tcopy,mt)
+  end
+  return tcopy
+end
+table.fastcopy=fastcopy
+table.copy=copy
+function table.derive(parent) 
+  local child={}
+  if parent then
+    setmetatable(child,{ __index=parent })
+  end
+  return child
+end
+function table.tohash(t,value)
+  local h={}
+  if t then
+    if value==nil then value=true end
+    for _,v in next,t do
+      h[v]=value
+    end
+  end
+  return h
+end
+function table.fromhash(t)
+  local hsh,h={},0
+  for k,v in next,t do
+    if v then
+      h=h+1
+      hsh[h]=k
+    end
+  end
+  return hsh
+end
+local noquotes,hexify,handle,compact,inline,functions,metacheck
+local reserved=table.tohash { 
+  'and','break','do','else','elseif','end','false','for','function','if',
+  'in','local','nil','not','or','repeat','return','then','true','until','while',
+  'NaN','goto',
+}
+local function is_simple_table(t,hexify) 
+  local nt=#t
+  if nt>0 then
+    local n=0
+    for _,v in next,t do
+      n=n+1
+      if type(v)=="table" then
+        return nil
+      end
+    end
+    local haszero=rawget(t,0) 
+    if n==nt then
+      local tt={}
+      for i=1,nt do
+        local v=t[i]
+        local tv=type(v)
+        if tv=="number" then
+          if hexify then
+            tt[i]=format("0x%X",v)
+          else
+            tt[i]=v 
+          end
+        elseif tv=="string" then
+          tt[i]=format("%q",v) 
+        elseif tv=="boolean" then
+          tt[i]=v and "true" or "false"
+        else
+          return nil
+        end
+      end
+      return tt
+    elseif haszero and (n==nt+1) then
+      local tt={}
+      for i=0,nt do
+        local v=t[i]
+        local tv=type(v)
+        if tv=="number" then
+          if hexify then
+            tt[i+1]=format("0x%X",v)
+          else
+            tt[i+1]=v 
+          end
+        elseif tv=="string" then
+          tt[i+1]=format("%q",v) 
+        elseif tv=="boolean" then
+          tt[i+1]=v and "true" or "false"
+        else
+          return nil
+        end
+      end
+      tt[1]="[0] = "..tt[1]
+      return tt
+    end
+  end
+  return nil
+end
+table.is_simple_table=is_simple_table
+local propername=patterns.propername 
+local function dummy() end
+local function do_serialize(root,name,depth,level,indexed)
+  if level>0 then
+    depth=depth.." "
+    if indexed then
+      handle(format("%s{",depth))
+    else
+      local tn=type(name)
+      if tn=="number" then
+        if hexify then
+          handle(format("%s[0x%X]={",depth,name))
+        else
+          handle(format("%s[%s]={",depth,name))
+        end
+      elseif tn=="string" then
+        if noquotes and not reserved[name] and lpegmatch(propername,name) then
+          handle(format("%s%s={",depth,name))
+        else
+          handle(format("%s[%q]={",depth,name))
+        end
+      elseif tn=="boolean" then
+        handle(format("%s[%s]={",depth,name and "true" or "false"))
+      else
+        handle(format("%s{",depth))
+      end
+    end
+  end
+  if root and next(root)~=nil then
+    local first,last=nil,0
+    if compact then
+      last=#root
+      for k=1,last do
+        if rawget(root,k)==nil then
+          last=k-1
+          break
+        end
+      end
+      if last>0 then
+        first=1
+      end
+    end
+    local sk=sortedkeys(root)
+    for i=1,#sk do
+      local k=sk[i]
+      local v=root[k]
+      local tv=type(v)
+      local tk=type(k)
+      if compact and first and tk=="number" and k>=first and k<=last then
+        if tv=="number" then
+          if hexify then
+            handle(format("%s 0x%X,",depth,v))
+          else
+            handle(format("%s %s,",depth,v)) 
+          end
+        elseif tv=="string" then
+          handle(format("%s %q,",depth,v))
+        elseif tv=="table" then
+          if next(v)==nil then
+            handle(format("%s {},",depth))
+          elseif inline then 
+            local st=is_simple_table(v,hexify)
+            if st then
+              handle(format("%s { %s },",depth,concat(st,", ")))
+            else
+              do_serialize(v,k,depth,level+1,true)
+            end
+          else
+            do_serialize(v,k,depth,level+1,true)
+          end
+        elseif tv=="boolean" then
+          handle(format("%s %s,",depth,v and "true" or "false"))
+        elseif tv=="function" then
+          if functions then
+            handle(format('%s load(%q),',depth,dump(v))) 
+          else
+            handle(format('%s "function",',depth))
+          end
+        else
+          handle(format("%s %q,",depth,tostring(v)))
+        end
+      elseif k=="__p__" then 
+        if false then
+          handle(format("%s __p__=nil,",depth))
+        end
+      elseif tv=="number" then
+        if tk=="number" then
+          if hexify then
+            handle(format("%s [0x%X]=0x%X,",depth,k,v))
+          else
+            handle(format("%s [%s]=%s,",depth,k,v)) 
+          end
+        elseif tk=="boolean" then
+          if hexify then
+            handle(format("%s [%s]=0x%X,",depth,k and "true" or "false",v))
+          else
+            handle(format("%s [%s]=%s,",depth,k and "true" or "false",v)) 
+          end
+        elseif tk~="string" then
+        elseif noquotes and not reserved[k] and lpegmatch(propername,k) then
+          if hexify then
+            handle(format("%s %s=0x%X,",depth,k,v))
+          else
+            handle(format("%s %s=%s,",depth,k,v)) 
+          end
+        else
+          if hexify then
+            handle(format("%s [%q]=0x%X,",depth,k,v))
+          else
+            handle(format("%s [%q]=%s,",depth,k,v)) 
+          end
+        end
+      elseif tv=="string" then
+        if tk=="number" then
+          if hexify then
+            handle(format("%s [0x%X]=%q,",depth,k,v))
+          else
+            handle(format("%s [%s]=%q,",depth,k,v))
+          end
+        elseif tk=="boolean" then
+          handle(format("%s [%s]=%q,",depth,k and "true" or "false",v))
+        elseif tk~="string" then
+        elseif noquotes and not reserved[k] and lpegmatch(propername,k) then
+          handle(format("%s %s=%q,",depth,k,v))
+        else
+          handle(format("%s [%q]=%q,",depth,k,v))
+        end
+      elseif tv=="table" then
+        if next(v)==nil then
+          if tk=="number" then
+            if hexify then
+              handle(format("%s [0x%X]={},",depth,k))
+            else
+              handle(format("%s [%s]={},",depth,k))
+            end
+          elseif tk=="boolean" then
+            handle(format("%s [%s]={},",depth,k and "true" or "false"))
+          elseif tk~="string" then
+          elseif noquotes and not reserved[k] and lpegmatch(propername,k) then
+            handle(format("%s %s={},",depth,k))
+          else
+            handle(format("%s [%q]={},",depth,k))
+          end
+        elseif inline then
+          local st=is_simple_table(v,hexify)
+          if st then
+            if tk=="number" then
+              if hexify then
+                handle(format("%s [0x%X]={ %s },",depth,k,concat(st,", ")))
+              else
+                handle(format("%s [%s]={ %s },",depth,k,concat(st,", ")))
+              end
+            elseif tk=="boolean" then
+              handle(format("%s [%s]={ %s },",depth,k and "true" or "false",concat(st,", ")))
+            elseif tk~="string" then
+            elseif noquotes and not reserved[k] and lpegmatch(propername,k) then
+              handle(format("%s %s={ %s },",depth,k,concat(st,", ")))
+            else
+              handle(format("%s [%q]={ %s },",depth,k,concat(st,", ")))
+            end
+          else
+            do_serialize(v,k,depth,level+1)
+          end
+        else
+          do_serialize(v,k,depth,level+1)
+        end
+      elseif tv=="boolean" then
+        if tk=="number" then
+          if hexify then
+            handle(format("%s [0x%X]=%s,",depth,k,v and "true" or "false"))
+          else
+            handle(format("%s [%s]=%s,",depth,k,v and "true" or "false"))
+          end
+        elseif tk=="boolean" then
+          handle(format("%s [%s]=%s,",depth,tostring(k),v and "true" or "false"))
+        elseif tk~="string" then
+        elseif noquotes and not reserved[k] and lpegmatch(propername,k) then
+          handle(format("%s %s=%s,",depth,k,v and "true" or "false"))
+        else
+          handle(format("%s [%q]=%s,",depth,k,v and "true" or "false"))
+        end
+      elseif tv=="function" then
+        if functions then
+          local f=getinfo(v).what=="C" and dump(dummy) or dump(v)
+          if tk=="number" then
+            if hexify then
+              handle(format("%s [0x%X]=load(%q),",depth,k,f))
+            else
+              handle(format("%s [%s]=load(%q),",depth,k,f))
+            end
+          elseif tk=="boolean" then
+            handle(format("%s [%s]=load(%q),",depth,k and "true" or "false",f))
+          elseif tk~="string" then
+          elseif noquotes and not reserved[k] and lpegmatch(propername,k) then
+            handle(format("%s %s=load(%q),",depth,k,f))
+          else
+            handle(format("%s [%q]=load(%q),",depth,k,f))
+          end
+        end
+      else
+        if tk=="number" then
+          if hexify then
+            handle(format("%s [0x%X]=%q,",depth,k,tostring(v)))
+          else
+            handle(format("%s [%s]=%q,",depth,k,tostring(v)))
+          end
+        elseif tk=="boolean" then
+          handle(format("%s [%s]=%q,",depth,k and "true" or "false",tostring(v)))
+        elseif tk~="string" then
+        elseif noquotes and not reserved[k] and lpegmatch(propername,k) then
+          handle(format("%s %s=%q,",depth,k,tostring(v)))
+        else
+          handle(format("%s [%q]=%q,",depth,k,tostring(v)))
+        end
+      end
+    end
+  end
+  if level>0 then
+    handle(format("%s},",depth))
+  end
+end
+local function serialize(_handle,root,name,specification) 
+  local tname=type(name)
+  if type(specification)=="table" then
+    noquotes=specification.noquotes
+    hexify=specification.hexify
+    handle=_handle or specification.handle or print
+    functions=specification.functions
+    compact=specification.compact
+    inline=specification.inline and compact
+    metacheck=specification.metacheck
+    if functions==nil then
+      functions=true
+    end
+    if compact==nil then
+      compact=true
+    end
+    if inline==nil then
+      inline=compact
+    end
+    if metacheck==nil then
+      metacheck=true
+    end
+  else
+    noquotes=false
+    hexify=false
+    handle=_handle or print
+    compact=true
+    inline=true
+    functions=true
+    metacheck=true
+  end
+  if tname=="string" then
+    if name=="return" then
+      handle("return {")
+    else
+      handle(name.."={")
+    end
+  elseif tname=="number" then
+    if hexify then
+      handle(format("[0x%X]={",name))
+    else
+      handle("["..name.."]={")
+    end
+  elseif tname=="boolean" then
+    if name then
+      handle("return {")
+    else
+      handle("{")
+    end
+  else
+    handle("t={")
+  end
+  if root then
+    if metacheck and getmetatable(root) then
+      local dummy=root._w_h_a_t_e_v_e_r_
+      root._w_h_a_t_e_v_e_r_=nil
+    end
+    if next(root)~=nil then
+      do_serialize(root,name,"",0)
+    end
+  end
+  handle("}")
+end
+function table.serialize(root,name,specification)
+  local t,n={},0
+  local function flush(s)
+    n=n+1
+    t[n]=s
+  end
+  serialize(flush,root,name,specification)
+  return concat(t,"\n")
+end
+table.tohandle=serialize
+local maxtab=2*1024
+function table.tofile(filename,root,name,specification)
+  local f=io.open(filename,'w')
+  if f then
+    if maxtab>1 then
+      local t,n={},0
+      local function flush(s)
+        n=n+1
+        t[n]=s
+        if n>maxtab then
+          f:write(concat(t,"\n"),"\n") 
+          t,n={},0 
+        end
+      end
+      serialize(flush,root,name,specification)
+      f:write(concat(t,"\n"),"\n")
+    else
+      local function flush(s)
+        f:write(s,"\n")
+      end
+      serialize(flush,root,name,specification)
+    end
+    f:close()
+    io.flush()
+  end
+end
+local function flattened(t,f,depth) 
+  if f==nil then
+    f={}
+    depth=0xFFFF
+  elseif tonumber(f) then
+    depth=f
+    f={}
+  elseif not depth then
+    depth=0xFFFF
+  end
+  for k,v in next,t do
+    if type(k)~="number" then
+      if depth>0 and type(v)=="table" then
+        flattened(v,f,depth-1)
+      else
+        f[#f+1]=v
+      end
+    end
+  end
+  for k=1,#t do
+    local v=t[k]
+    if depth>0 and type(v)=="table" then
+      flattened(v,f,depth-1)
+    else
+      f[#f+1]=v
+    end
+  end
+  return f
+end
+table.flattened=flattened
+local function collapsed(t,f,h)
+  if f==nil then
+    f={}
+    h={}
+  end
+  for k=1,#t do
+    local v=t[k]
+    if type(v)=="table" then
+      collapsed(v,f,h)
+    elseif not h[v] then
+      f[#f+1]=v
+      h[v]=true
+    end
+  end
+  return f
+end
+local function collapsedhash(t,h)
+  if h==nil then
+    h={}
+  end
+  for k=1,#t do
+    local v=t[k]
+    if type(v)=="table" then
+      collapsedhash(v,h)
+    else
+      h[v]=true
+    end
+  end
+  return h
+end
+table.collapsed=collapsed   
+table.collapsedhash=collapsedhash
+local function unnest(t,f) 
+  if not f then     
+    f={}      
+  end
+  for i=1,#t do
+    local v=t[i]
+    if type(v)=="table" then
+      if type(v[1])=="table" then
+        unnest(v,f)
+      else
+        f[#f+1]=v
+      end
+    else
+      f[#f+1]=v
+    end
+  end
+  return f
+end
+function table.unnest(t) 
+  return unnest(t)
+end
+local function are_equal(a,b,n,m) 
+  if a==b then
+    return true
+  elseif a and b and #a==#b then
+    n=n or 1
+    m=m or #a
+    for i=n,m do
+      local ai,bi=a[i],b[i]
+      if ai==bi then
+      elseif type(ai)=="table" and type(bi)=="table" then
+        if not are_equal(ai,bi) then
+          return false
+        end
+      else
+        return false
+      end
+    end
+    return true
+  else
+    return false
+  end
+end
+local function identical(a,b) 
+  if a~=b then
+    for ka,va in next,a do
+      local vb=b[ka]
+      if va==vb then
+      elseif type(va)=="table" and type(vb)=="table" then
+        if not identical(va,vb) then
+          return false
+        end
+      else
+        return false
+      end
+    end
+  end
+  return true
+end
+table.identical=identical
+table.are_equal=are_equal
+local function sparse(old,nest,keeptables)
+  local new={}
+  for k,v in next,old do
+    if not (v=="" or v==false) then
+      if nest and type(v)=="table" then
+        v=sparse(v,nest)
+        if keeptables or next(v)~=nil then
+          new[k]=v
+        end
+      else
+        new[k]=v
+      end
+    end
+  end
+  return new
+end
+table.sparse=sparse
+function table.compact(t)
+  return sparse(t,true,true)
+end
+function table.contains(t,v)
+  if t then
+    for i=1,#t do
+      if t[i]==v then
+        return i
+      end
+    end
+  end
+  return false
+end
+function table.count(t)
+  local n=0
+  for k,v in next,t do
+    n=n+1
+  end
+  return n
+end
+function table.swapped(t,s) 
+  local n={}
+  if s then
+    for k,v in next,s do
+      n[k]=v
+    end
+  end
+  for k,v in next,t do
+    n[v]=k
+  end
+  return n
+end
+function table.hashed(t) 
+  for i=1,#t do
+    t[t[i]]=i
+  end
+  return t
+end
+function table.mirrored(t) 
+  local n={}
+  for k,v in next,t do
+    n[v]=k
+    n[k]=v
+  end
+  return n
+end
+function table.reversed(t)
+  if t then
+    local tt,tn={},#t
+    if tn>0 then
+      local ttn=0
+      for i=tn,1,-1 do
+        ttn=ttn+1
+        tt[ttn]=t[i]
+      end
+    end
+    return tt
+  end
+end
+function table.reverse(t)
+  if t then
+    local n=#t
+    for i=1,floor(n/2) do
+      local j=n-i+1
+      t[i],t[j]=t[j],t[i]
+    end
+    return t
+  end
+end
+function table.sequenced(t,sep,simple) 
+  if not t then
+    return ""
+  end
+  local n=#t
+  local s={}
+  if n>0 then
+    for i=1,n do
+      s[i]=tostring(t[i])
+    end
+  else
+    n=0
+    for k,v in sortedhash(t) do
+      if simple then
+        if v==true then
+          n=n+1
+          s[n]=k
+        elseif v and v~="" then
+          n=n+1
+          s[n]=k.."="..tostring(v)
+        end
+      else
+        n=n+1
+        s[n]=k.."="..tostring(v)
+      end
+    end
+  end
+  return concat(s,sep or " | ")
+end
+function table.print(t,...)
+  if type(t)~="table" then
+    print(tostring(t))
+  else
+    serialize(print,t,...)
+  end
+end
+if setinspector then
+  setinspector("table",function(v) if type(v)=="table" then serialize(print,v,"table") return true end end)
+end
+function table.sub(t,i,j)
+  return { unpack(t,i,j) }
+end
+function table.is_empty(t)
+  return not t or next(t)==nil
+end
+function table.has_one_entry(t)
+  return t and next(t,next(t))==nil
+end
+function table.loweredkeys(t) 
+  local l={}
+  for k,v in next,t do
+    l[lower(k)]=v
+  end
+  return l
+end
+function table.unique(old)
+  local hash={}
+  local new={}
+  local n=0
+  for i=1,#old do
+    local oi=old[i]
+    if not hash[oi] then
+      n=n+1
+      new[n]=oi
+      hash[oi]=true
+    end
+  end
+  return new
+end
+function table.sorted(t,...)
+  sort(t,...)
+  return t 
+end
+function table.values(t,s) 
+  if t then
+    local values,keys,v={},{},0
+    for key,value in next,t do
+      if not keys[value] then
+        v=v+1
+        values[v]=value
+        keys[k]=key
+      end
+    end
+    if s then
+      sort(values)
+    end
+    return values
+  else
+    return {}
+  end
+end
+function table.filtered(t,pattern,sort,cmp)
+  if t and type(pattern)=="string" then
+    if sort then
+      local s
+      if cmp then
+        s=sortedhashkeys(t,function(a,b) return cmp(t,a,b) end)
+      else
+        s=sortedkeys(t) 
+      end
+      local n=0
+      local m=#s
+      local function kv(s)
+        while n<m do
+          n=n+1
+          local k=s[n]
+          if find(k,pattern) then
+            return k,t[k]
+          end
+        end
+      end
+      return kv,s
+    else
+      local n=next(t)
+      local function iterator()
+        while n~=nil do
+          local k=n
+          n=next(t,k)
+          if find(k,pattern) then
+            return k,t[k]
+          end
+        end
+      end
+      return iterator,t
+    end
+  else
+    return nothing
+  end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['l-io']={
+  version=1.001,
+  comment="companion to luat-lib.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local io=io
+local open,flush,write,read=io.open,io.flush,io.write,io.read
+local byte,find,gsub,format=string.byte,string.find,string.gsub,string.format
+local concat=table.concat
+local floor=math.floor
+local type=type
+if string.find(os.getenv("PATH"),";",1,true) then
+  io.fileseparator,io.pathseparator="\\",";"
+else
+  io.fileseparator,io.pathseparator="/",":"
+end
+local large=2^24    
+local medium=large/16 
+local small=medium/8
+local function readall(f)
+  local size=f:seek("end")
+  if size>0 then
+    f:seek("set",0)
+    return f:read(size)
+  else
+    return ""
+  end
+end
+io.readall=readall
+function io.loaddata(filename,textmode) 
+  local f=open(filename,(textmode and 'r') or 'rb')
+  if f then
+    local size=f:seek("end")
+    local data=nil
+    if size>0 then
+      f:seek("set",0)
+      data=f:read(size)
+    end
+    f:close()
+    return data
+  end
+end
+function io.copydata(source,target,action)
+  local f=open(source,"rb")
+  if f then
+    local g=open(target,"wb")
+    if g then
+      local size=f:seek("end")
+      if size>0 then
+        f:seek("set",0)
+        local data=f:read(size)
+        if action then
+          data=action(data)
+        end
+        if data then
+          g:write(data)
+        end
+      end
+      g:close()
+    end
+    f:close()
+    flush()
+  end
+end
+function io.savedata(filename,data,joiner)
+  local f=open(filename,"wb")
+  if f then
+    if type(data)=="table" then
+      f:write(concat(data,joiner or ""))
+    elseif type(data)=="function" then
+      data(f)
+    else
+      f:write(data or "")
+    end
+    f:close()
+    flush()
+    return true
+  else
+    return false
+  end
+end
+if fio and fio.readline then
+  local readline=fio.readline
+  function io.loadlines(filename,n) 
+    local f=open(filename,'r')
+    if not f then
+    elseif n then
+      local lines={}
+      for i=1,n do
+        local line=readline(f)
+        if line then
+          lines[i]=line
+        else
+          break
+        end
+      end
+      f:close()
+      lines=concat(lines,"\n")
+      if #lines>0 then
+        return lines
+      end
+    else
+      local line=readline(f)
+      f:close()
+      if line and #line>0 then
+        return line
+      end
+    end
+  end
+else
+  function io.loadlines(filename,n) 
+    local f=open(filename,'r')
+    if not f then
+    elseif n then
+      local lines={}
+      for i=1,n do
+        local line=f:read("*lines")
+        if line then
+          lines[i]=line
+        else
+          break
+        end
+      end
+      f:close()
+      lines=concat(lines,"\n")
+      if #lines>0 then
+        return lines
+      end
+    else
+      local line=f:read("*line") or ""
+      f:close()
+      if #line>0 then
+        return line
+      end
+    end
+  end
+end
+function io.loadchunk(filename,n)
+  local f=open(filename,'rb')
+  if f then
+    local data=f:read(n or 1024)
+    f:close()
+    if #data>0 then
+      return data
+    end
+  end
+end
+function io.exists(filename)
+  local f=open(filename)
+  if f==nil then
+    return false
+  else
+    f:close()
+    return true
+  end
+end
+function io.size(filename)
+  local f=open(filename)
+  if f==nil then
+    return 0
+  else
+    local s=f:seek("end")
+    f:close()
+    return s
+  end
+end
+local function noflines(f)
+  if type(f)=="string" then
+    local f=open(filename)
+    if f then
+      local n=f and noflines(f) or 0
+      f:close()
+      return n
+    else
+      return 0
+    end
+  else
+    local n=0
+    for _ in f:lines() do
+      n=n+1
+    end
+    f:seek('set',0)
+    return n
+  end
+end
+io.noflines=noflines
+local nextchar={
+  [ 4]=function(f)
+    return f:read(1,1,1,1)
+  end,
+  [ 2]=function(f)
+    return f:read(1,1)
+  end,
+  [ 1]=function(f)
+    return f:read(1)
+  end,
+  [-2]=function(f)
+    local a,b=f:read(1,1)
+    return b,a
+  end,
+  [-4]=function(f)
+    local a,b,c,d=f:read(1,1,1,1)
+    return d,c,b,a
+  end
+}
+function io.characters(f,n)
+  if f then
+    return nextchar[n or 1],f
+  end
+end
+local nextbyte={
+  [4]=function(f)
+    local a,b,c,d=f:read(1,1,1,1)
+    if d then
+      return byte(a),byte(b),byte(c),byte(d)
+    end
+  end,
+  [3]=function(f)
+    local a,b,c=f:read(1,1,1)
+    if b then
+      return byte(a),byte(b),byte(c)
+    end
+  end,
+  [2]=function(f)
+    local a,b=f:read(1,1)
+    if b then
+      return byte(a),byte(b)
+    end
+  end,
+  [1]=function (f)
+    local a=f:read(1)
+    if a then
+      return byte(a)
+    end
+  end,
+  [-2]=function (f)
+    local a,b=f:read(1,1)
+    if b then
+      return byte(b),byte(a)
+    end
+  end,
+  [-3]=function(f)
+    local a,b,c=f:read(1,1,1)
+    if b then
+      return byte(c),byte(b),byte(a)
+    end
+  end,
+  [-4]=function(f)
+    local a,b,c,d=f:read(1,1,1,1)
+    if d then
+      return byte(d),byte(c),byte(b),byte(a)
+    end
+  end
+}
+function io.bytes(f,n)
+  if f then
+    return nextbyte[n or 1],f
+  else
+    return nil,nil
+  end
+end
+function io.ask(question,default,options)
+  while true do
+    write(question)
+    if options then
+      write(format(" [%s]",concat(options,"|")))
+    end
+    if default then
+      write(format(" [%s]",default))
+    end
+    write(format(" "))
+    flush()
+    local answer=read()
+    answer=gsub(answer,"^%s*(.*)%s*$","%1")
+    if answer=="" and default then
+      return default
+    elseif not options then
+      return answer
+    else
+      for k=1,#options do
+        if options[k]==answer then
+          return answer
+        end
+      end
+      local pattern="^"..answer
+      for k=1,#options do
+        local v=options[k]
+        if find(v,pattern) then
+          return v
+        end
+      end
+    end
+  end
+end
+local function readnumber(f,n,m) 
+  if m then
+    f:seek("set",n)
+    n=m
+  end
+  if n==1 then
+    return byte(f:read(1))
+  elseif n==2 then
+    local a,b=byte(f:read(2),1,2)
+    return 0x100*a+b
+  elseif n==3 then
+    local a,b,c=byte(f:read(3),1,3)
+    return 0x10000*a+0x100*b+c
+  elseif n==4 then
+    local a,b,c,d=byte(f:read(4),1,4)
+    return 0x1000000*a+0x10000*b+0x100*c+d
+  elseif n==8 then
+    local a,b=readnumber(f,4),readnumber(f,4)
+    return 0x100*a+b
+  elseif n==12 then
+    local a,b,c=readnumber(f,4),readnumber(f,4),readnumber(f,4)
+    return 0x10000*a+0x100*b+c
+  elseif n==-2 then
+    local b,a=byte(f:read(2),1,2)
+    return 0x100*a+b
+  elseif n==-3 then
+    local c,b,a=byte(f:read(3),1,3)
+    return 0x10000*a+0x100*b+c
+  elseif n==-4 then
+    local d,c,b,a=byte(f:read(4),1,4)
+    return 0x1000000*a+0x10000*b+0x100*c+d
+  elseif n==-8 then
+    local h,g,f,e,d,c,b,a=byte(f:read(8),1,8)
+    return 0x100000000000000*a+0x1000000000000*b+0x10000000000*c+0x100000000*d+0x1000000*e+0x10000*f+0x100*g+h
+  else
+    return 0
+  end
+end
+io.readnumber=readnumber
+function io.readstring(f,n,m)
+  if m then
+    f:seek("set",n)
+    n=m
+  end
+  local str=gsub(f:read(n),"\000","")
+  return str
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['l-file']={
+  version=1.001,
+  comment="companion to luat-lib.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+file=file or {}
+local file=file
+if not lfs then
+  lfs=optionalrequire("lfs")
+end
+local insert,concat=table.insert,table.concat
+local match,find,gmatch=string.match,string.find,string.gmatch
+local lpegmatch=lpeg.match
+local getcurrentdir,attributes=lfs.currentdir,lfs.attributes
+local checkedsplit=string.checkedsplit
+local P,R,S,C,Cs,Cp,Cc,Ct=lpeg.P,lpeg.R,lpeg.S,lpeg.C,lpeg.Cs,lpeg.Cp,lpeg.Cc,lpeg.Ct
+local tricky=S("/\\")*P(-1)
+local attributes=lfs.attributes
+if sandbox then
+  sandbox.redefine(lfs.isfile,"lfs.isfile")
+  sandbox.redefine(lfs.isdir,"lfs.isdir")
+end
+function lfs.isdir(name)
+  if lpegmatch(tricky,name) then
+    return attributes(name,"mode")=="directory"
+  else
+    return attributes(name.."/.","mode")=="directory"
+  end
+end
+function lfs.isfile(name)
+  return attributes(name,"mode")=="file"
+end
+local colon=P(":")
+local period=P(".")
+local periods=P("..")
+local fwslash=P("/")
+local bwslash=P("\\")
+local slashes=S("\\/")
+local noperiod=1-period
+local noslashes=1-slashes
+local name=noperiod^1
+local suffix=period/""*(1-period-slashes)^1*-1
+local pattern=C((1-(slashes^1*noslashes^1*-1))^1)*P(1) 
+local function pathpart(name,default)
+  return name and lpegmatch(pattern,name) or default or ""
+end
+local pattern=(noslashes^0*slashes)^1*C(noslashes^1)*-1
+local function basename(name)
+  return name and lpegmatch(pattern,name) or name
+end
+local pattern=(noslashes^0*slashes^1)^0*Cs((1-suffix)^1)*suffix^0
+local function nameonly(name)
+  return name and lpegmatch(pattern,name) or name
+end
+local pattern=(noslashes^0*slashes)^0*(noperiod^1*period)^1*C(noperiod^1)*-1
+local function suffixonly(name)
+  return name and lpegmatch(pattern,name) or ""
+end
+local pattern=(noslashes^0*slashes)^0*noperiod^1*((period*C(noperiod^1))^1)*-1+Cc("")
+local function suffixesonly(name)
+  if name then
+    return lpegmatch(pattern,name)
+  else
+    return ""
+  end
+end
+file.pathpart=pathpart
+file.basename=basename
+file.nameonly=nameonly
+file.suffixonly=suffixonly
+file.suffix=suffixonly
+file.suffixesonly=suffixesonly
+file.suffixes=suffixesonly
+file.dirname=pathpart  
+file.extname=suffixonly
+local drive=C(R("az","AZ"))*colon
+local path=C((noslashes^0*slashes)^0)
+local suffix=period*C(P(1-period)^0*P(-1))
+local base=C((1-suffix)^0)
+local rest=C(P(1)^0)
+drive=drive+Cc("")
+path=path+Cc("")
+base=base+Cc("")
+suffix=suffix+Cc("")
+local pattern_a=drive*path*base*suffix
+local pattern_b=path*base*suffix
+local pattern_c=C(drive*path)*C(base*suffix) 
+local pattern_d=path*rest
+function file.splitname(str,splitdrive)
+  if not str then
+  elseif splitdrive then
+    return lpegmatch(pattern_a,str) 
+  else
+    return lpegmatch(pattern_b,str) 
+  end
+end
+function file.splitbase(str)
+  if str then
+    return lpegmatch(pattern_d,str) 
+  else
+    return "",str 
+  end
+end
+function file.nametotable(str,splitdrive)
+  if str then
+    local path,drive,subpath,name,base,suffix=lpegmatch(pattern_c,str)
+    if splitdrive then
+      return {
+        path=path,
+        drive=drive,
+        subpath=subpath,
+        name=name,
+        base=base,
+        suffix=suffix,
+      }
+    else
+      return {
+        path=path,
+        name=name,
+        base=base,
+        suffix=suffix,
+      }
+    end
+  end
+end
+local pattern=Cs(((period*(1-period-slashes)^1*-1)/""+1)^1)
+function file.removesuffix(name)
+  return name and lpegmatch(pattern,name)
+end
+local suffix=period/""*(1-period-slashes)^1*-1
+local pattern=Cs((noslashes^0*slashes^1)^0*((1-suffix)^1))*Cs(suffix)
+function file.addsuffix(filename,suffix,criterium)
+  if not filename or not suffix or suffix=="" then
+    return filename
+  elseif criterium==true then
+    return filename.."."..suffix
+  elseif not criterium then
+    local n,s=lpegmatch(pattern,filename)
+    if not s or s=="" then
+      return filename.."."..suffix
+    else
+      return filename
+    end
+  else
+    local n,s=lpegmatch(pattern,filename)
+    if s and s~="" then
+      local t=type(criterium)
+      if t=="table" then
+        for i=1,#criterium do
+          if s==criterium[i] then
+            return filename
+          end
+        end
+      elseif t=="string" then
+        if s==criterium then
+          return filename
+        end
+      end
+    end
+    return (n or filename).."."..suffix
+  end
+end
+local suffix=period*(1-period-slashes)^1*-1
+local pattern=Cs((1-suffix)^0)
+function file.replacesuffix(name,suffix)
+  if name and suffix and suffix~="" then
+    return lpegmatch(pattern,name).."."..suffix
+  else
+    return name
+  end
+end
+local reslasher=lpeg.replacer(P("\\"),"/")
+function file.reslash(str)
+  return str and lpegmatch(reslasher,str)
+end
+function file.is_writable(name)
+  if not name then
+  elseif lfs.isdir(name) then
+    name=name.."/m_t_x_t_e_s_t.tmp"
+    local f=io.open(name,"wb")
+    if f then
+      f:close()
+      os.remove(name)
+      return true
+    end
+  elseif lfs.isfile(name) then
+    local f=io.open(name,"ab")
+    if f then
+      f:close()
+      return true
+    end
+  else
+    local f=io.open(name,"ab")
+    if f then
+      f:close()
+      os.remove(name)
+      return true
+    end
+  end
+  return false
+end
+local readable=P("r")*Cc(true)
+function file.is_readable(name)
+  if name then
+    local a=attributes(name)
+    return a and lpegmatch(readable,a.permissions) or false
+  else
+    return false
+  end
+end
+file.isreadable=file.is_readable 
+file.iswritable=file.is_writable 
+function file.size(name)
+  if name then
+    local a=attributes(name)
+    return a and a.size or 0
+  else
+    return 0
+  end
+end
+function file.splitpath(str,separator) 
+  return str and checkedsplit(lpegmatch(reslasher,str),separator or io.pathseparator)
+end
+function file.joinpath(tab,separator) 
+  return tab and concat(tab,separator or io.pathseparator) 
+end
+local someslash=S("\\/")
+local stripper=Cs(P(fwslash)^0/""*reslasher)
+local isnetwork=someslash*someslash*(1-someslash)+(1-fwslash-colon)^1*colon
+local isroot=fwslash^1*-1
+local hasroot=fwslash^1
+local reslasher=lpeg.replacer(S("\\/"),"/")
+local deslasher=lpeg.replacer(S("\\/")^1,"/")
+function file.join(one,two,three,...)
+  if not two then
+    return one=="" and one or lpegmatch(reslasher,one)
+  end
+  if one=="" then
+    return lpegmatch(stripper,three and concat({ two,three,... },"/") or two)
+  end
+  if lpegmatch(isnetwork,one) then
+    local one=lpegmatch(reslasher,one)
+    local two=lpegmatch(deslasher,three and concat({ two,three,... },"/") or two)
+    if lpegmatch(hasroot,two) then
+      return one..two
+    else
+      return one.."/"..two
+    end
+  elseif lpegmatch(isroot,one) then
+    local two=lpegmatch(deslasher,three and concat({ two,three,... },"/") or two)
+    if lpegmatch(hasroot,two) then
+      return two
+    else
+      return "/"..two
+    end
+  else
+    return lpegmatch(deslasher,concat({ one,two,three,... },"/"))
+  end
+end
+local drivespec=R("az","AZ")^1*colon
+local anchors=fwslash+drivespec
+local untouched=periods+(1-period)^1*P(-1)
+local mswindrive=Cs(drivespec*(bwslash/"/"+fwslash)^0)
+local mswinuncpath=(bwslash+fwslash)*(bwslash+fwslash)*Cc("//")
+local splitstarter=(mswindrive+mswinuncpath+Cc(false))*Ct(lpeg.splitat(S("/\\")^1))
+local absolute=fwslash
+function file.collapsepath(str,anchor) 
+  if not str then
+    return
+  end
+  if anchor==true and not lpegmatch(anchors,str) then
+    str=getcurrentdir().."/"..str
+  end
+  if str=="" or str=="." then
+    return "."
+  elseif lpegmatch(untouched,str) then
+    return lpegmatch(reslasher,str)
+  end
+  local starter,oldelements=lpegmatch(splitstarter,str)
+  local newelements={}
+  local i=#oldelements
+  while i>0 do
+    local element=oldelements[i]
+    if element=='.' then
+    elseif element=='..' then
+      local n=i-1
+      while n>0 do
+        local element=oldelements[n]
+        if element~='..' and element~='.' then
+          oldelements[n]='.'
+          break
+        else
+          n=n-1
+        end
+       end
+      if n<1 then
+        insert(newelements,1,'..')
+      end
+    elseif element~="" then
+      insert(newelements,1,element)
+    end
+    i=i-1
+  end
+  if #newelements==0 then
+    return starter or "."
+  elseif starter then
+    return starter..concat(newelements,'/')
+  elseif lpegmatch(absolute,str) then
+    return "/"..concat(newelements,'/')
+  else
+    newelements=concat(newelements,'/')
+    if anchor=="." and find(str,"^%./") then
+      return "./"..newelements
+    else
+      return newelements
+    end
+  end
+end
+local validchars=R("az","09","AZ","--","..")
+local pattern_a=lpeg.replacer(1-validchars)
+local pattern_a=Cs((validchars+P(1)/"-")^1)
+local whatever=P("-")^0/""
+local pattern_b=Cs(whatever*(1-whatever*-1)^1)
+function file.robustname(str,strict)
+  if str then
+    str=lpegmatch(pattern_a,str) or str
+    if strict then
+      return lpegmatch(pattern_b,str) or str 
+    else
+      return str
+    end
+  end
+end
+local loaddata=io.loaddata
+local savedata=io.savedata
+file.readdata=loaddata
+file.savedata=savedata
+function file.copy(oldname,newname)
+  if oldname and newname then
+    local data=loaddata(oldname)
+    if data and data~="" then
+      savedata(newname,data)
+    end
+  end
+end
+local letter=R("az","AZ")+S("_-+")
+local separator=P("://")
+local qualified=period^0*fwslash+letter*colon+letter^1*separator+letter^1*fwslash
+local rootbased=fwslash+letter*colon
+lpeg.patterns.qualified=qualified
+lpeg.patterns.rootbased=rootbased
+function file.is_qualified_path(filename)
+  return filename and lpegmatch(qualified,filename)~=nil
+end
+function file.is_rootbased_path(filename)
+  return filename and lpegmatch(rootbased,filename)~=nil
+end
+function file.strip(name,dir)
+  if name then
+    local b,a=match(name,"^(.-)"..dir.."(.*)$")
+    return a~="" and a or name
+  end
+end
+function lfs.mkdirs(path)
+  local full=""
+  for sub in gmatch(path,"(/*[^\\/]+)") do 
+    full=full..sub
+    lfs.mkdir(full)
+  end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['l-boolean']={
+  version=1.001,
+  comment="companion to luat-lib.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local type,tonumber=type,tonumber
+boolean=boolean or {}
+local boolean=boolean
+function boolean.tonumber(b)
+  if b then return 1 else return 0 end 
+end
+function toboolean(str,tolerant) 
+  if str==nil then
+    return false
+  elseif str==false then
+    return false
+  elseif str==true then
+    return true
+  elseif str=="true" then
+    return true
+  elseif str=="false" then
+    return false
+  elseif not tolerant then
+    return false
+  elseif str==0 then
+    return false
+  elseif (tonumber(str) or 0)>0 then
+    return true
+  else
+    return str=="yes" or str=="on" or str=="t"
+  end
+end
+string.toboolean=toboolean
+function string.booleanstring(str)
+  if str=="0" then
+    return false
+  elseif str=="1" then
+    return true
+  elseif str=="" then
+    return false
+  elseif str=="false" then
+    return false
+  elseif str=="true" then
+    return true
+  elseif (tonumber(str) or 0)>0 then
+    return true
+  else
+    return str=="yes" or str=="on" or str=="t"
+  end
+end
+function string.is_boolean(str,default,strict)
+  if type(str)=="string" then
+    if str=="true" or str=="yes" or str=="on" or str=="t" or (not strict and str=="1") then
+      return true
+    elseif str=="false" or str=="no" or str=="off" or str=="f" or (not strict and str=="0") then
+      return false
+    end
+  end
+  return default
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['l-math']={
+  version=1.001,
+  comment="companion to luat-lib.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local floor,sin,cos,tan=math.floor,math.sin,math.cos,math.tan
+if not math.ceiling then
+  math.ceiling=math.ceil
+end
+if not math.round then
+  function math.round(x) return floor(x+0.5) end
+end
+if not math.div then
+  function math.div(n,m) return floor(n/m) end
+end
+if not math.mod then
+  function math.mod(n,m) return n%m end
+end
+local pipi=2*math.pi/360
+if not math.sind then
+  function math.sind(d) return sin(d*pipi) end
+  function math.cosd(d) return cos(d*pipi) end
+  function math.tand(d) return tan(d*pipi) end
+end
+if not math.odd then
+  function math.odd (n) return n%2~=0 end
+  function math.even(n) return n%2==0 end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['l-unicode']={
+  version=1.001,
+  comment="companion to luat-lib.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+utf=utf or (unicode and unicode.utf8) or {}
+utf.characters=utf.characters or string.utfcharacters
+utf.values=utf.values   or string.utfvalues
+local type=type
+local char,byte,format,sub,gmatch=string.char,string.byte,string.format,string.sub,string.gmatch
+local concat=table.concat
+local P,C,R,Cs,Ct,Cmt,Cc,Carg,Cp=lpeg.P,lpeg.C,lpeg.R,lpeg.Cs,lpeg.Ct,lpeg.Cmt,lpeg.Cc,lpeg.Carg,lpeg.Cp
+local lpegmatch=lpeg.match
+local patterns=lpeg.patterns
+local tabletopattern=lpeg.utfchartabletopattern
+local bytepairs=string.bytepairs
+local finder=lpeg.finder
+local replacer=lpeg.replacer
+local utfvalues=utf.values
+local utfgmatch=utf.gmatch 
+local p_utftype=patterns.utftype
+local p_utfstricttype=patterns.utfstricttype
+local p_utfoffset=patterns.utfoffset
+local p_utf8char=patterns.utf8character
+local p_utf8byte=patterns.utf8byte
+local p_utfbom=patterns.utfbom
+local p_newline=patterns.newline
+local p_whitespace=patterns.whitespace
+if not unicode then
+  unicode={ utf=utf } 
+end
+if not utf.char then
+  local floor,char=math.floor,string.char
+  function utf.char(n)
+    if n<0x80 then
+      return char(n)
+    elseif n<0x800 then
+      return char(
+        0xC0+floor(n/0x40),
+        0x80+(n%0x40)
+      )
+    elseif n<0x10000 then
+      return char(
+        0xE0+floor(n/0x1000),
+        0x80+(floor(n/0x40)%0x40),
+        0x80+(n%0x40)
+      )
+    elseif n<0x200000 then
+      return char(
+        0xF0+floor(n/0x40000),
+        0x80+(floor(n/0x1000)%0x40),
+        0x80+(floor(n/0x40)%0x40),
+        0x80+(n%0x40)
+      )
+    else
+      return ""
+    end
+  end
+end
+if not utf.byte then
+  local utf8byte=patterns.utf8byte
+  function utf.byte(c)
+    return lpegmatch(utf8byte,c)
+  end
+end
+local utfchar,utfbyte=utf.char,utf.byte
+function utf.filetype(data)
+  return data and lpegmatch(p_utftype,data) or "unknown"
+end
+local toentities=Cs (
+  (
+    patterns.utf8one+(
+        patterns.utf8two+patterns.utf8three+patterns.utf8four
+      )/function(s) local b=utfbyte(s) if b<127 then return s else return format("&#%X;",b) end end
+  )^0
+)
+patterns.toentities=toentities
+function utf.toentities(str)
+  return lpegmatch(toentities,str)
+end
+local one=P(1)
+local two=C(1)*C(1)
+local four=C(R(utfchar(0xD8),utfchar(0xFF)))*C(1)*C(1)*C(1)
+local pattern=P("\254\255")*Cs((
+          four/function(a,b,c,d)
+                local ab=0xFF*byte(a)+byte(b)
+                local cd=0xFF*byte(c)+byte(d)
+                return utfchar((ab-0xD800)*0x400+(cd-0xDC00)+0x10000)
+              end+two/function(a,b)
+                return utfchar(byte(a)*256+byte(b))
+              end+one
+        )^1 )+P("\255\254")*Cs((
+          four/function(b,a,d,c)
+                local ab=0xFF*byte(a)+byte(b)
+                local cd=0xFF*byte(c)+byte(d)
+                return utfchar((ab-0xD800)*0x400+(cd-0xDC00)+0x10000)
+              end+two/function(b,a)
+                return utfchar(byte(a)*256+byte(b))
+              end+one
+        )^1 )
+function string.toutf(s) 
+  return lpegmatch(pattern,s) or s 
+end
+local validatedutf=Cs (
+  (
+    patterns.utf8one+patterns.utf8two+patterns.utf8three+patterns.utf8four+P(1)/"�"
+  )^0
+)
+patterns.validatedutf=validatedutf
+function utf.is_valid(str)
+  return type(str)=="string" and lpegmatch(validatedutf,str) or false
+end
+if not utf.len then
+  local n,f=0,1
+  local utfcharcounter=patterns.utfbom^-1*Cmt (
+    Cc(1)*patterns.utf8one^1+Cc(2)*patterns.utf8two^1+Cc(3)*patterns.utf8three^1+Cc(4)*patterns.utf8four^1,
+    function(_,t,d) 
+      n=n+(t-f)/d
+      f=t
+      return true
+    end
+  )^0
+  function utf.len(str)
+    n,f=0,1
+    lpegmatch(utfcharcounter,str or "")
+    return n
+  end
+end
+utf.length=utf.len
+if not utf.sub then
+  local utflength=utf.length
+  local b,e,n,first,last=0,0,0,0,0
+  local function slide_zero(s,p)
+    n=n+1
+    if n>=last then
+      e=p-1
+    else
+      return p
+    end
+  end
+  local function slide_one(s,p)
+    n=n+1
+    if n==first then
+      b=p
+    end
+    if n>=last then
+      e=p-1
+    else
+      return p
+    end
+  end
+  local function slide_two(s,p)
+    n=n+1
+    if n==first then
+      b=p
+    else
+      return true
+    end
+  end
+  local pattern_zero=Cmt(p_utf8char,slide_zero)^0
+  local pattern_one=Cmt(p_utf8char,slide_one )^0
+  local pattern_two=Cmt(p_utf8char,slide_two )^0
+  local pattern_first=C(patterns.utf8character)
+  function utf.sub(str,start,stop)
+    if not start then
+      return str
+    end
+    if start==0 then
+      start=1
+    end
+    if not stop then
+      if start<0 then
+        local l=utflength(str) 
+        start=l+start
+      else
+        start=start-1
+      end
+      b,n,first=0,0,start
+      lpegmatch(pattern_two,str)
+      if n>=first then
+        return sub(str,b)
+      else
+        return ""
+      end
+    end
+    if start<0 or stop<0 then
+      local l=utf.length(str)
+      if start<0 then
+        start=l+start
+        if start<=0 then
+          start=1
+        else
+          start=start+1
+        end
+      end
+      if stop<0 then
+        stop=l+stop
+        if stop==0 then
+          stop=1
+        else
+          stop=stop+1
+        end
+      end
+    end
+    if start==1 and stop==1 then
+      return lpegmatch(pattern_first,str) or ""
+    elseif start>stop then
+      return ""
+    elseif start>1 then
+      b,e,n,first,last=0,0,0,start-1,stop
+      lpegmatch(pattern_one,str)
+      if n>=first and e==0 then
+        e=#str
+      end
+      return sub(str,b,e)
+    else
+      b,e,n,last=1,0,0,stop
+      lpegmatch(pattern_zero,str)
+      if e==0 then
+        e=#str
+      end
+      return sub(str,b,e)
+    end
+  end
+end
+function utf.remapper(mapping,option,action) 
+  local variant=type(mapping)
+  if variant=="table" then
+    action=action or mapping
+    if option=="dynamic" then
+      local pattern=false
+      table.setmetatablenewindex(mapping,function(t,k,v) rawset(t,k,v) pattern=false end)
+      return function(str)
+        if not str or str=="" then
+          return ""
+        else
+          if not pattern then
+            pattern=Cs((tabletopattern(mapping)/action+p_utf8char)^0)
+          end
+          return lpegmatch(pattern,str)
+        end
+      end
+    elseif option=="pattern" then
+      return Cs((tabletopattern(mapping)/action+p_utf8char)^0)
+    else
+      local pattern=Cs((tabletopattern(mapping)/action+p_utf8char)^0)
+      return function(str)
+        if not str or str=="" then
+          return ""
+        else
+          return lpegmatch(pattern,str)
+        end
+      end,pattern
+    end
+  elseif variant=="function" then
+    if option=="pattern" then
+      return Cs((p_utf8char/mapping+p_utf8char)^0)
+    else
+      local pattern=Cs((p_utf8char/mapping+p_utf8char)^0)
+      return function(str)
+        if not str or str=="" then
+          return ""
+        else
+          return lpegmatch(pattern,str)
+        end
+      end,pattern
+    end
+  else
+    return function(str)
+      return str or ""
+    end
+  end
+end
+function utf.replacer(t) 
+  local r=replacer(t,false,false,true)
+  return function(str)
+    return lpegmatch(r,str)
+  end
+end
+function utf.subtituter(t) 
+  local f=finder (t)
+  local r=replacer(t,false,false,true)
+  return function(str)
+    local i=lpegmatch(f,str)
+    if not i then
+      return str
+    elseif i>#str then
+      return str
+    else
+      return lpegmatch(r,str)
+    end
+  end
+end
+local utflinesplitter=p_utfbom^-1*lpeg.tsplitat(p_newline)
+local utfcharsplitter_ows=p_utfbom^-1*Ct(C(p_utf8char)^0)
+local utfcharsplitter_iws=p_utfbom^-1*Ct((p_whitespace^1+C(p_utf8char))^0)
+local utfcharsplitter_raw=Ct(C(p_utf8char)^0)
+patterns.utflinesplitter=utflinesplitter
+function utf.splitlines(str)
+  return lpegmatch(utflinesplitter,str or "")
+end
+function utf.split(str,ignorewhitespace) 
+  if ignorewhitespace then
+    return lpegmatch(utfcharsplitter_iws,str or "")
+  else
+    return lpegmatch(utfcharsplitter_ows,str or "")
+  end
+end
+function utf.totable(str) 
+  return lpegmatch(utfcharsplitter_raw,str)
+end
+function utf.magic(f) 
+  local str=f:read(4) or ""
+  local off=lpegmatch(p_utfoffset,str)
+  if off<4 then
+    f:seek('set',off)
+  end
+  return lpegmatch(p_utftype,str)
+end
+local utf16_to_utf8_be,utf16_to_utf8_le
+local utf32_to_utf8_be,utf32_to_utf8_le
+local utf_16_be_getbom=patterns.utfbom_16_be^-1
+local utf_16_le_getbom=patterns.utfbom_16_le^-1
+local utf_32_be_getbom=patterns.utfbom_32_be^-1
+local utf_32_le_getbom=patterns.utfbom_32_le^-1
+local utf_16_be_linesplitter=utf_16_be_getbom*lpeg.tsplitat(patterns.utf_16_be_nl)
+local utf_16_le_linesplitter=utf_16_le_getbom*lpeg.tsplitat(patterns.utf_16_le_nl)
+local utf_32_be_linesplitter=utf_32_be_getbom*lpeg.tsplitat(patterns.utf_32_be_nl)
+local utf_32_le_linesplitter=utf_32_le_getbom*lpeg.tsplitat(patterns.utf_32_le_nl)
+local more=0
+local p_utf16_to_utf8_be=C(1)*C(1)/function(left,right)
+  local now=256*byte(left)+byte(right)
+  if more>0 then
+    now=(more-0xD800)*0x400+(now-0xDC00)+0x10000 
+    more=0
+    return utfchar(now)
+  elseif now>=0xD800 and now<=0xDBFF then
+    more=now
+    return "" 
+  else
+    return utfchar(now)
+  end
+end
+local p_utf16_to_utf8_le=C(1)*C(1)/function(right,left)
+  local now=256*byte(left)+byte(right)
+  if more>0 then
+    now=(more-0xD800)*0x400+(now-0xDC00)+0x10000 
+    more=0
+    return utfchar(now)
+  elseif now>=0xD800 and now<=0xDBFF then
+    more=now
+    return "" 
+  else
+    return utfchar(now)
+  end
+end
+local p_utf32_to_utf8_be=C(1)*C(1)*C(1)*C(1)/function(a,b,c,d)
+  return utfchar(256*256*256*byte(a)+256*256*byte(b)+256*byte(c)+byte(d))
+end
+local p_utf32_to_utf8_le=C(1)*C(1)*C(1)*C(1)/function(a,b,c,d)
+  return utfchar(256*256*256*byte(d)+256*256*byte(c)+256*byte(b)+byte(a))
+end
+p_utf16_to_utf8_be=P(true)/function() more=0 end*utf_16_be_getbom*Cs(p_utf16_to_utf8_be^0)
+p_utf16_to_utf8_le=P(true)/function() more=0 end*utf_16_le_getbom*Cs(p_utf16_to_utf8_le^0)
+p_utf32_to_utf8_be=P(true)/function() more=0 end*utf_32_be_getbom*Cs(p_utf32_to_utf8_be^0)
+p_utf32_to_utf8_le=P(true)/function() more=0 end*utf_32_le_getbom*Cs(p_utf32_to_utf8_le^0)
+patterns.utf16_to_utf8_be=p_utf16_to_utf8_be
+patterns.utf16_to_utf8_le=p_utf16_to_utf8_le
+patterns.utf32_to_utf8_be=p_utf32_to_utf8_be
+patterns.utf32_to_utf8_le=p_utf32_to_utf8_le
+utf16_to_utf8_be=function(s)
+  if s and s~="" then
+    return lpegmatch(p_utf16_to_utf8_be,s)
+  else
+    return s
+  end
+end
+local utf16_to_utf8_be_t=function(t)
+  if not t then
+    return nil
+  elseif type(t)=="string" then
+    t=lpegmatch(utf_16_be_linesplitter,t)
+  end
+  for i=1,#t do
+    local s=t[i]
+    if s~="" then
+      t[i]=lpegmatch(p_utf16_to_utf8_be,s)
+    end
+  end
+  return t
+end
+utf16_to_utf8_le=function(s)
+  if s and s~="" then
+    return lpegmatch(p_utf16_to_utf8_le,s)
+  else
+    return s
+  end
+end
+local utf16_to_utf8_le_t=function(t)
+  if not t then
+    return nil
+  elseif type(t)=="string" then
+    t=lpegmatch(utf_16_le_linesplitter,t)
+  end
+  for i=1,#t do
+    local s=t[i]
+    if s~="" then
+      t[i]=lpegmatch(p_utf16_to_utf8_le,s)
+    end
+  end
+  return t
+end
+utf32_to_utf8_be=function(s)
+  if s and s~="" then
+    return lpegmatch(p_utf32_to_utf8_be,s)
+  else
+    return s
+  end
+end
+local utf32_to_utf8_be_t=function(t)
+  if not t then
+    return nil
+  elseif type(t)=="string" then
+    t=lpegmatch(utf_32_be_linesplitter,t)
+  end
+  for i=1,#t do
+    local s=t[i]
+    if s~="" then
+      t[i]=lpegmatch(p_utf32_to_utf8_be,s)
+    end
+  end
+  return t
+end
+utf32_to_utf8_le=function(s)
+  if s and s~="" then
+    return lpegmatch(p_utf32_to_utf8_le,s)
+  else
+    return s
+  end
+end
+local utf32_to_utf8_le_t=function(t)
+  if not t then
+    return nil
+  elseif type(t)=="string" then
+    t=lpegmatch(utf_32_le_linesplitter,t)
+  end
+  for i=1,#t do
+    local s=t[i]
+    if s~="" then
+      t[i]=lpegmatch(p_utf32_to_utf8_le,s)
+    end
+  end
+  return t
+end
+utf.utf16_to_utf8_le_t=utf16_to_utf8_le_t
+utf.utf16_to_utf8_be_t=utf16_to_utf8_be_t
+utf.utf32_to_utf8_le_t=utf32_to_utf8_le_t
+utf.utf32_to_utf8_be_t=utf32_to_utf8_be_t
+utf.utf16_to_utf8_le=utf16_to_utf8_le
+utf.utf16_to_utf8_be=utf16_to_utf8_be
+utf.utf32_to_utf8_le=utf32_to_utf8_le
+utf.utf32_to_utf8_be=utf32_to_utf8_be
+function utf.utf8_to_utf8_t(t)
+  return type(t)=="string" and lpegmatch(utflinesplitter,t) or t
+end
+function utf.utf16_to_utf8_t(t,endian)
+  return endian and utf16_to_utf8_be_t(t) or utf16_to_utf8_le_t(t) or t
+end
+function utf.utf32_to_utf8_t(t,endian)
+  return endian and utf32_to_utf8_be_t(t) or utf32_to_utf8_le_t(t) or t
+end
+local function little(b)
+  if b<0x10000 then
+    return char(b%256,b/256)
+  else
+    b=b-0x10000
+    local b1,b2=b/1024+0xD800,b%1024+0xDC00
+    return char(b1%256,b1/256,b2%256,b2/256)
+  end
+end
+local function big(b)
+  if b<0x10000 then
+    return char(b/256,b%256)
+  else
+    b=b-0x10000
+    local b1,b2=b/1024+0xD800,b%1024+0xDC00
+    return char(b1/256,b1%256,b2/256,b2%256)
+  end
+end
+local l_remap=Cs((p_utf8byte/little+P(1)/"")^0)
+local b_remap=Cs((p_utf8byte/big+P(1)/"")^0)
+local function utf8_to_utf16_be(str,nobom)
+  if nobom then
+    return lpegmatch(b_remap,str)
+  else
+    return char(254,255)..lpegmatch(b_remap,str)
+  end
+end
+local function utf8_to_utf16_le(str,nobom)
+  if nobom then
+    return lpegmatch(l_remap,str)
+  else
+    return char(255,254)..lpegmatch(l_remap,str)
+  end
+end
+utf.utf8_to_utf16_be=utf8_to_utf16_be
+utf.utf8_to_utf16_le=utf8_to_utf16_le
+function utf.utf8_to_utf16(str,littleendian,nobom)
+  if littleendian then
+    return utf8_to_utf16_le(str,nobom)
+  else
+    return utf8_to_utf16_be(str,nobom)
+  end
+end
+local pattern=Cs (
+  (p_utf8byte/function(unicode     ) return format("0x%04X",unicode) end)*(p_utf8byte*Carg(1)/function(unicode,separator) return format("%s0x%04X",separator,unicode) end)^0
+)
+function utf.tocodes(str,separator)
+  return lpegmatch(pattern,str,1,separator or " ")
+end
+function utf.ustring(s)
+  return format("U+%05X",type(s)=="number" and s or utfbyte(s))
+end
+function utf.xstring(s)
+  return format("0x%05X",type(s)=="number" and s or utfbyte(s))
+end
+function utf.toeight(str)
+  if not str or str=="" then
+    return nil
+  end
+  local utftype=lpegmatch(p_utfstricttype,str)
+  if utftype=="utf-8" then
+    return sub(str,4)        
+  elseif utftype=="utf-16-be" then
+    return utf16_to_utf8_be(str)  
+  elseif utftype=="utf-16-le" then
+    return utf16_to_utf8_le(str)  
+  else
+    return str
+  end
+end
+local p_nany=p_utf8char/""
+if utfgmatch then
+  function utf.count(str,what)
+    if type(what)=="string" then
+      local n=0
+      for _ in utfgmatch(str,what) do
+        n=n+1
+      end
+      return n
+    else 
+      return #lpegmatch(Cs((P(what)/" "+p_nany)^0),str)
+    end
+  end
+else
+  local cache={}
+  function utf.count(str,what)
+    if type(what)=="string" then
+      local p=cache[what]
+      if not p then
+        p=Cs((P(what)/" "+p_nany)^0)
+        cache[p]=p
+      end
+      return #lpegmatch(p,str)
+    else 
+      return #lpegmatch(Cs((P(what)/" "+p_nany)^0),str)
+    end
+  end
+end
+if not utf.characters then
+  function utf.characters(str)
+    return gmatch(str,".[\128-\191]*")
+  end
+  string.utfcharacters=utf.characters
+end
+if not utf.values then
+  local find=string.find
+  local dummy=function()
+  end
+  function utf.values(str)
+    local n=#str
+    if n==0 then
+      return dummy
+    elseif n==1 then
+      return function() return utfbyte(str) end
+    else
+      local p=1
+      return function()
+          local b,e=find(str,".[\128-\191]*",p)
+          if b then
+            p=e+1
+            return utfbyte(sub(str,b,e))
+          end
+      end
+    end
+  end
+  string.utfvalues=utf.values
+end
+function utf.chrlen(u) 
+  return
+    (u<0x80 and 1) or
+    (u<0xE0 and 2) or
+    (u<0xF0 and 3) or
+    (u<0xF8 and 4) or
+    (u<0xFC and 5) or
+    (u<0xFE and 6) or 0
+end
+local extract=bit32.extract
+local char=string.char
+function unicode.toutf32string(n)
+  if n<=0xFF then
+    return
+      char(n).."\000\000\000"
+  elseif n<=0xFFFF then
+    return
+      char(extract(n,0,8))..char(extract(n,8,8)).."\000\000"
+  elseif n<=0xFFFFFF then
+    return
+      char(extract(n,0,8))..char(extract(n,8,8))..char(extract(n,16,8)).."\000"
+  else
+    return
+      char(extract(n,0,8))..char(extract(n,8,8))..char(extract(n,16,8))..char(extract(n,24,8))
+  end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['util-str']={
+  version=1.001,
+  comment="companion to luat-lib.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+utilities=utilities or {}
+utilities.strings=utilities.strings or {}
+local strings=utilities.strings
+local format,gsub,rep,sub,find=string.format,string.gsub,string.rep,string.sub,string.find
+local load,dump=load,string.dump
+local tonumber,type,tostring=tonumber,type,tostring
+local unpack,concat=table.unpack,table.concat
+local P,V,C,S,R,Ct,Cs,Cp,Carg,Cc=lpeg.P,lpeg.V,lpeg.C,lpeg.S,lpeg.R,lpeg.Ct,lpeg.Cs,lpeg.Cp,lpeg.Carg,lpeg.Cc
+local patterns,lpegmatch=lpeg.patterns,lpeg.match
+local utfchar,utfbyte=utf.char,utf.byte
+local loadstripped=nil
+if _LUAVERSION<5.2 then
+  loadstripped=function(str,shortcuts)
+    return load(str)
+  end
+else
+  loadstripped=function(str,shortcuts)
+    if shortcuts then
+      return load(dump(load(str),true),nil,nil,shortcuts)
+    else
+      return load(dump(load(str),true))
+    end
+  end
+end
+if not number then number={} end 
+local stripper=patterns.stripzeros
+local newline=patterns.newline
+local endofstring=patterns.endofstring
+local whitespace=patterns.whitespace
+local spacer=patterns.spacer
+local spaceortab=patterns.spaceortab
+local function points(n)
+  n=tonumber(n)
+  return (not n or n==0) and "0pt" or lpegmatch(stripper,format("%.5fpt",n/65536))
+end
+local function basepoints(n)
+  n=tonumber(n)
+  return (not n or n==0) and "0bp" or lpegmatch(stripper,format("%.5fbp",n*(7200/7227)/65536))
+end
+number.points=points
+number.basepoints=basepoints
+local rubish=spaceortab^0*newline
+local anyrubish=spaceortab+newline
+local anything=patterns.anything
+local stripped=(spaceortab^1/"")*newline
+local leading=rubish^0/""
+local trailing=(anyrubish^1*endofstring)/""
+local redundant=rubish^3/"\n"
+local pattern=Cs(leading*(trailing+redundant+stripped+anything)^0)
+function strings.collapsecrlf(str)
+  return lpegmatch(pattern,str)
+end
+local repeaters={} 
+function strings.newrepeater(str,offset)
+  offset=offset or 0
+  local s=repeaters[str]
+  if not s then
+    s={}
+    repeaters[str]=s
+  end
+  local t=s[offset]
+  if t then
+    return t
+  end
+  t={}
+  setmetatable(t,{ __index=function(t,k)
+    if not k then
+      return ""
+    end
+    local n=k+offset
+    local s=n>0 and rep(str,n) or ""
+    t[k]=s
+    return s
+  end })
+  s[offset]=t
+  return t
+end
+local extra,tab,start=0,0,4,0
+local nspaces=strings.newrepeater(" ")
+string.nspaces=nspaces
+local pattern=Carg(1)/function(t)
+    extra,tab,start=0,t or 7,1
+  end*Cs((
+   Cp()*patterns.tab/function(position)
+     local current=(position-start+1)+extra
+     local spaces=tab-(current-1)%tab
+     if spaces>0 then
+       extra=extra+spaces-1
+       return nspaces[spaces] 
+     else
+       return ""
+     end
+   end+newline*Cp()/function(position)
+     extra,start=0,position
+   end+patterns.anything
+ )^1)
+function strings.tabtospace(str,tab)
+  return lpegmatch(pattern,str,1,tab or 7)
+end
+local space=spacer^0
+local nospace=space/""
+local endofline=nospace*newline
+local stripend=(whitespace^1*endofstring)/""
+local normalline=(nospace*((1-space*(newline+endofstring))^1)*nospace)
+local stripempty=endofline^1/""
+local normalempty=endofline^1
+local singleempty=endofline*(endofline^0/"")
+local doubleempty=endofline*endofline^-1*(endofline^0/"")
+local stripstart=stripempty^0
+local p_prune_normal=Cs (stripstart*(stripend+normalline+normalempty )^0 )
+local p_prune_collapse=Cs (stripstart*(stripend+normalline+doubleempty )^0 )
+local p_prune_noempty=Cs (stripstart*(stripend+normalline+singleempty )^0 )
+local p_retain_normal=Cs ((normalline+normalempty )^0 )
+local p_retain_collapse=Cs ((normalline+doubleempty )^0 )
+local p_retain_noempty=Cs ((normalline+singleempty )^0 )
+local striplinepatterns={
+  ["prune"]=p_prune_normal,
+  ["prune and collapse"]=p_prune_collapse,
+  ["prune and no empty"]=p_prune_noempty,
+  ["retain"]=p_retain_normal,
+  ["retain and collapse"]=p_retain_collapse,
+  ["retain and no empty"]=p_retain_noempty,
+  ["collapse"]=patterns.collapser,
+}
+setmetatable(striplinepatterns,{ __index=function(t,k) return p_prune_collapse end })
+strings.striplinepatterns=striplinepatterns
+function strings.striplines(str,how)
+  return str and lpegmatch(striplinepatterns[how],str) or str
+end
+strings.striplong=strings.striplines
+function strings.nice(str)
+  str=gsub(str,"[:%-+_]+"," ") 
+  return str
+end
+local n=0
+local sequenced=table.sequenced
+function string.autodouble(s,sep)
+  if s==nil then
+    return '""'
+  end
+  local t=type(s)
+  if t=="number" then
+    return tostring(s) 
+  end
+  if t=="table" then
+    return ('"'..sequenced(s,sep or ",")..'"')
+  end
+  return ('"'..tostring(s)..'"')
+end
+function string.autosingle(s,sep)
+  if s==nil then
+    return "''"
+  end
+  local t=type(s)
+  if t=="number" then
+    return tostring(s) 
+  end
+  if t=="table" then
+    return ("'"..sequenced(s,sep or ",").."'")
+  end
+  return ("'"..tostring(s).."'")
+end
+local tracedchars={ [0]=
+  "[null]","[soh]","[stx]","[etx]","[eot]","[enq]","[ack]","[bel]",
+  "[bs]","[ht]","[lf]","[vt]","[ff]","[cr]","[so]","[si]",
+  "[dle]","[dc1]","[dc2]","[dc3]","[dc4]","[nak]","[syn]","[etb]",
+  "[can]","[em]","[sub]","[esc]","[fs]","[gs]","[rs]","[us]",
+  "[space]",
+}
+string.tracedchars=tracedchars
+strings.tracers=tracedchars
+function string.tracedchar(b)
+  if type(b)=="number" then
+    return tracedchars[b] or (utfchar(b).." (U+"..format("%05X",b)..")")
+  else
+    local c=utfbyte(b)
+    return tracedchars[c] or (b.." (U+"..(c and format("%05X",c) or "?????")..")")
+  end
+end
+function number.signed(i)
+  if i>0 then
+    return "+",i
+  else
+    return "-",-i
+  end
+end
+local digit=patterns.digit
+local period=patterns.period
+local three=digit*digit*digit
+local splitter=Cs (
+  (((1-(three^1*period))^1+C(three))*(Carg(1)*three)^1+C((1-period)^1))*(P(1)/""*Carg(2))*C(2)
+)
+patterns.formattednumber=splitter
+function number.formatted(n,sep1,sep2)
+  local s=type(s)=="string" and n or format("%0.2f",n)
+  if sep1==true then
+    return lpegmatch(splitter,s,1,".",",")
+  elseif sep1=="." then
+    return lpegmatch(splitter,s,1,sep1,sep2 or ",")
+  elseif sep1=="," then
+    return lpegmatch(splitter,s,1,sep1,sep2 or ".")
+  else
+    return lpegmatch(splitter,s,1,sep1 or ",",sep2 or ".")
+  end
+end
+local p=Cs(
+    P("-")^0*(P("0")^1/"")^0*(1-P("."))^0*(P(".")*P("0")^1*P(-1)/""+P(".")^0)*P(1-P("0")^1*P(-1))^0
+  )
+function number.compactfloat(n,fmt)
+  if n==0 then
+    return "0"
+  elseif n==1 then
+    return "1"
+  end
+  n=lpegmatch(p,format(fmt or "%0.3f",n))
+  if n=="." or n=="" or n=="-" then
+    return "0"
+  end
+  return n
+end
+local zero=P("0")^1/""
+local plus=P("+")/""
+local minus=P("-")
+local separator=S(".")
+local digit=R("09")
+local trailing=zero^1*#S("eE")
+local exponent=(S("eE")*(plus+Cs((minus*zero^0*P(-1))/"")+minus)*zero^0*(P(-1)*Cc("0")+P(1)^1))
+local pattern_a=Cs(minus^0*digit^1*(separator/""*trailing+separator*(trailing+digit)^0)*exponent)
+local pattern_b=Cs((exponent+P(1))^0)
+function number.sparseexponent(f,n)
+  if not n then
+    n=f
+    f="%e"
+  end
+  local tn=type(n)
+  if tn=="string" then 
+    local m=tonumber(n)
+    if m then
+      return lpegmatch((f=="%e" or f=="%E") and pattern_a or pattern_b,format(f,m))
+    end
+  elseif tn=="number" then
+    return lpegmatch((f=="%e" or f=="%E") and pattern_a or pattern_b,format(f,n))
+  end
+  return tostring(n)
+end
+local hf={}
+local hs={}
+setmetatable(hf,{ __index=function(t,k)
+  local v="%."..k.."f"
+  t[k]=v
+  return v
+end } )
+setmetatable(hs,{ __index=function(t,k)
+  local v="%"..k.."s"
+  t[k]=v
+  return v
+end } )
+function number.formattedfloat(n,b,a)
+  local s=format(hf[a],n)
+  local l=(b or 0)+(a or 0)+1
+  if #s<l then
+    return format(hs[l],s)
+  else
+    return s
+  end
+end
+local template=[[
+%s
+%s
+return function(%s) return %s end
+]]
+local preamble,environment="",{}
+if _LUAVERSION<5.2 then
+  preamble=[[
+local lpeg=lpeg
+local type=type
+local tostring=tostring
+local tonumber=tonumber
+local format=string.format
+local concat=table.concat
+local signed=number.signed
+local points=number.points
+local basepoints= number.basepoints
+local utfchar=utf.char
+local utfbyte=utf.byte
+local lpegmatch=lpeg.match
+local nspaces=string.nspaces
+local tracedchar=string.tracedchar
+local autosingle=string.autosingle
+local autodouble=string.autodouble
+local sequenced=table.sequenced
+local formattednumber=number.formatted
+local sparseexponent=number.sparseexponent
+local formattedfloat=number.formattedfloat
+    ]]
+else
+  environment={
+    global=global or _G,
+    lpeg=lpeg,
+    type=type,
+    tostring=tostring,
+    tonumber=tonumber,
+    format=string.format,
+    concat=table.concat,
+    signed=number.signed,
+    points=number.points,
+    basepoints=number.basepoints,
+    utfchar=utf.char,
+    utfbyte=utf.byte,
+    lpegmatch=lpeg.match,
+    nspaces=string.nspaces,
+    tracedchar=string.tracedchar,
+    autosingle=string.autosingle,
+    autodouble=string.autodouble,
+    sequenced=table.sequenced,
+    formattednumber=number.formatted,
+    sparseexponent=number.sparseexponent,
+    formattedfloat=number.formattedfloat
+  }
+end
+local arguments={ "a1" } 
+setmetatable(arguments,{ __index=function(t,k)
+    local v=t[k-1]..",a"..k
+    t[k]=v
+    return v
+  end
+})
+local prefix_any=C((S("+- .")+R("09"))^0)
+local prefix_sub=(C((S("+-")+R("09"))^0)+Cc(0))*P(".")*(C((S("+-")+R("09"))^0)+Cc(0))
+local prefix_tab=P("{")*C((1-P("}"))^0)*P("}")+C((1-R("az","AZ","09","%%"))^0)
+local format_s=function(f)
+  n=n+1
+  if f and f~="" then
+    return format("format('%%%ss',a%s)",f,n)
+  else 
+    return format("(a%s or '')",n) 
+  end
+end
+local format_S=function(f) 
+  n=n+1
+  if f and f~="" then
+    return format("format('%%%ss',tostring(a%s))",f,n)
+  else
+    return format("tostring(a%s)",n)
+  end
+end
+local format_q=function()
+  n=n+1
+  return format("(a%s and format('%%q',a%s) or '')",n,n) 
+end
+local format_Q=function() 
+  n=n+1
+  return format("format('%%q',tostring(a%s))",n)
+end
+local format_i=function(f)
+  n=n+1
+  if f and f~="" then
+    return format("format('%%%si',a%s)",f,n)
+  else
+    return format("format('%%i',a%s)",n) 
+  end
+end
+local format_d=format_i
+local format_I=function(f)
+  n=n+1
+  return format("format('%%s%%%si',signed(a%s))",f,n)
+end
+local format_f=function(f)
+  n=n+1
+  return format("format('%%%sf',a%s)",f,n)
+end
+local format_F=function(f) 
+  n=n+1
+  if not f or f=="" then
+    return format("(((a%s > -0.0000000005 and a%s < 0.0000000005) and '0') or format((a%s %% 1 == 0) and '%%i' or '%%.9f',a%s))",n,n,n,n)
+  else
+    return format("format((a%s %% 1 == 0) and '%%i' or '%%%sf',a%s)",n,f,n)
+  end
+end
+local format_k=function(b,a) 
+  n=n+1
+  return format("formattedfloat(a%s,%i,%i)",n,b or 0,a or 0)
+end
+local format_g=function(f)
+  n=n+1
+  return format("format('%%%sg',a%s)",f,n)
+end
+local format_G=function(f)
+  n=n+1
+  return format("format('%%%sG',a%s)",f,n)
+end
+local format_e=function(f)
+  n=n+1
+  return format("format('%%%se',a%s)",f,n)
+end
+local format_E=function(f)
+  n=n+1
+  return format("format('%%%sE',a%s)",f,n)
+end
+local format_j=function(f)
+  n=n+1
+  return format("sparseexponent('%%%se',a%s)",f,n)
+end
+local format_J=function(f)
+  n=n+1
+  return format("sparseexponent('%%%sE',a%s)",f,n)
+end
+local format_x=function(f)
+  n=n+1
+  return format("format('%%%sx',a%s)",f,n)
+end
+local format_X=function(f)
+  n=n+1
+  return format("format('%%%sX',a%s)",f,n)
+end
+local format_o=function(f)
+  n=n+1
+  return format("format('%%%so',a%s)",f,n)
+end
+local format_c=function()
+  n=n+1
+  return format("utfchar(a%s)",n)
+end
+local format_C=function()
+  n=n+1
+  return format("tracedchar(a%s)",n)
+end
+local format_r=function(f)
+  n=n+1
+  return format("format('%%%s.0f',a%s)",f,n)
+end
+local format_h=function(f)
+  n=n+1
+  if f=="-" then
+    f=sub(f,2)
+    return format("format('%%%sx',type(a%s) == 'number' and a%s or utfbyte(a%s))",f=="" and "05" or f,n,n,n)
+  else
+    return format("format('0x%%%sx',type(a%s) == 'number' and a%s or utfbyte(a%s))",f=="" and "05" or f,n,n,n)
+  end
+end
+local format_H=function(f)
+  n=n+1
+  if f=="-" then
+    f=sub(f,2)
+    return format("format('%%%sX',type(a%s) == 'number' and a%s or utfbyte(a%s))",f=="" and "05" or f,n,n,n)
+  else
+    return format("format('0x%%%sX',type(a%s) == 'number' and a%s or utfbyte(a%s))",f=="" and "05" or f,n,n,n)
+  end
+end
+local format_u=function(f)
+  n=n+1
+  if f=="-" then
+    f=sub(f,2)
+    return format("format('%%%sx',type(a%s) == 'number' and a%s or utfbyte(a%s))",f=="" and "05" or f,n,n,n)
+  else
+    return format("format('u+%%%sx',type(a%s) == 'number' and a%s or utfbyte(a%s))",f=="" and "05" or f,n,n,n)
+  end
+end
+local format_U=function(f)
+  n=n+1
+  if f=="-" then
+    f=sub(f,2)
+    return format("format('%%%sX',type(a%s) == 'number' and a%s or utfbyte(a%s))",f=="" and "05" or f,n,n,n)
+  else
+    return format("format('U+%%%sX',type(a%s) == 'number' and a%s or utfbyte(a%s))",f=="" and "05" or f,n,n,n)
+  end
+end
+local format_p=function()
+  n=n+1
+  return format("points(a%s)",n)
+end
+local format_b=function()
+  n=n+1
+  return format("basepoints(a%s)",n)
+end
+local format_t=function(f)
+  n=n+1
+  if f and f~="" then
+    return format("concat(a%s,%q)",n,f)
+  else
+    return format("concat(a%s)",n)
+  end
+end
+local format_T=function(f)
+  n=n+1
+  if f and f~="" then
+    return format("sequenced(a%s,%q)",n,f)
+  else
+    return format("sequenced(a%s)",n)
+  end
+end
+local format_l=function()
+  n=n+1
+  return format("(a%s and 'true' or 'false')",n)
+end
+local format_L=function()
+  n=n+1
+  return format("(a%s and 'TRUE' or 'FALSE')",n)
+end
+local format_N=function() 
+  n=n+1
+  return format("tostring(tonumber(a%s) or a%s)",n,n)
+end
+local format_a=function(f)
+  n=n+1
+  if f and f~="" then
+    return format("autosingle(a%s,%q)",n,f)
+  else
+    return format("autosingle(a%s)",n)
+  end
+end
+local format_A=function(f)
+  n=n+1
+  if f and f~="" then
+    return format("autodouble(a%s,%q)",n,f)
+  else
+    return format("autodouble(a%s)",n)
+  end
+end
+local format_w=function(f) 
+  n=n+1
+  f=tonumber(f)
+  if f then 
+    return format("nspaces[%s+a%s]",f,n) 
+  else
+    return format("nspaces[a%s]",n) 
+  end
+end
+local format_W=function(f) 
+  return format("nspaces[%s]",tonumber(f) or 0)
+end
+local format_m=function(f)
+  n=n+1
+  if not f or f=="" then
+    f=","
+  end
+  return format([[formattednumber(a%s,%q,".")]],n,f)
+end
+local format_M=function(f)
+  n=n+1
+  if not f or f=="" then
+    f="."
+  end
+  return format([[formattednumber(a%s,%q,",")]],n,f)
+end
+local format_z=function(f)
+  n=n+(tonumber(f) or 1)
+  return "''" 
+end
+local format_rest=function(s)
+  return format("%q",s) 
+end
+local format_extension=function(extensions,f,name)
+  local extension=extensions[name] or "tostring(%s)"
+  local f=tonumber(f) or 1
+  local w=find(extension,"%.%.%.")
+  if f==0 then
+    if w then
+      extension=gsub(extension,"%.%.%.","")
+    end
+    return extension
+  elseif f==1 then
+    if w then
+      extension=gsub(extension,"%.%.%.","%%s")
+    end
+    n=n+1
+    local a="a"..n
+    return format(extension,a,a) 
+  elseif f<0 then
+    local a="a"..(n+f+1)
+    return format(extension,a,a)
+  else
+    if w then
+      extension=gsub(extension,"%.%.%.",rep("%%s,",f-1).."%%s")
+    end
+    local t={}
+    for i=1,f do
+      n=n+1
+      t[i]="a"..n
+    end
+    return format(extension,unpack(t))
+  end
+end
+local builder=Cs { "start",
+  start=(
+    (
+      P("%")/""*(
+        V("!") 
++V("s")+V("q")+V("i")+V("d")+V("f")+V("F")+V("g")+V("G")+V("e")+V("E")+V("x")+V("X")+V("o")
++V("c")+V("C")+V("S") 
++V("Q") 
++V("N") 
++V("k")
++V("r")+V("h")+V("H")+V("u")+V("U")+V("p")+V("b")+V("t")+V("T")+V("l")+V("L")+V("I")+V("w") 
++V("W") 
++V("a") 
++V("A") 
++V("j")+V("J") 
++V("m")+V("M") 
++V("z")
+      )+V("*")
+    )*(P(-1)+Carg(1))
+  )^0,
+  ["s"]=(prefix_any*P("s"))/format_s,
+  ["q"]=(prefix_any*P("q"))/format_q,
+  ["i"]=(prefix_any*P("i"))/format_i,
+  ["d"]=(prefix_any*P("d"))/format_d,
+  ["f"]=(prefix_any*P("f"))/format_f,
+  ["F"]=(prefix_any*P("F"))/format_F,
+  ["g"]=(prefix_any*P("g"))/format_g,
+  ["G"]=(prefix_any*P("G"))/format_G,
+  ["e"]=(prefix_any*P("e"))/format_e,
+  ["E"]=(prefix_any*P("E"))/format_E,
+  ["x"]=(prefix_any*P("x"))/format_x,
+  ["X"]=(prefix_any*P("X"))/format_X,
+  ["o"]=(prefix_any*P("o"))/format_o,
+  ["S"]=(prefix_any*P("S"))/format_S,
+  ["Q"]=(prefix_any*P("Q"))/format_S,
+  ["N"]=(prefix_any*P("N"))/format_N,
+  ["k"]=(prefix_sub*P("k"))/format_k,
+  ["c"]=(prefix_any*P("c"))/format_c,
+  ["C"]=(prefix_any*P("C"))/format_C,
+  ["r"]=(prefix_any*P("r"))/format_r,
+  ["h"]=(prefix_any*P("h"))/format_h,
+  ["H"]=(prefix_any*P("H"))/format_H,
+  ["u"]=(prefix_any*P("u"))/format_u,
+  ["U"]=(prefix_any*P("U"))/format_U,
+  ["p"]=(prefix_any*P("p"))/format_p,
+  ["b"]=(prefix_any*P("b"))/format_b,
+  ["t"]=(prefix_tab*P("t"))/format_t,
+  ["T"]=(prefix_tab*P("T"))/format_T,
+  ["l"]=(prefix_any*P("l"))/format_l,
+  ["L"]=(prefix_any*P("L"))/format_L,
+  ["I"]=(prefix_any*P("I"))/format_I,
+  ["w"]=(prefix_any*P("w"))/format_w,
+  ["W"]=(prefix_any*P("W"))/format_W,
+  ["j"]=(prefix_any*P("j"))/format_j,
+  ["J"]=(prefix_any*P("J"))/format_J,
+  ["m"]=(prefix_tab*P("m"))/format_m,
+  ["M"]=(prefix_tab*P("M"))/format_M,
+  ["z"]=(prefix_any*P("z"))/format_z,
+  ["a"]=(prefix_any*P("a"))/format_a,
+  ["A"]=(prefix_any*P("A"))/format_A,
+  ["*"]=Cs(((1-P("%"))^1+P("%%")/"%%")^1)/format_rest,
+  ["?"]=Cs(((1-P("%"))^1        )^1)/format_rest,
+  ["!"]=Carg(2)*prefix_any*P("!")*C((1-P("!"))^1)*P("!")/format_extension,
+}
+local direct=Cs (
+  P("%")*(S("+- .")+R("09"))^0*S("sqidfgGeExXo")*P(-1)/[[local format = string.format return function(str) return format("%0",str) end]]
+)
+local function make(t,str)
+  local f
+  local p
+  local p=lpegmatch(direct,str)
+  if p then
+    f=loadstripped(p)()
+  else
+    n=0
+    p=lpegmatch(builder,str,1,t._connector_,t._extensions_) 
+    if n>0 then
+      p=format(template,preamble,t._preamble_,arguments[n],p)
+      f=loadstripped(p,t._environment_)() 
+    else
+      f=function() return str end
+    end
+  end
+  t[str]=f
+  return f
+end
+local function use(t,fmt,...)
+  return t[fmt](...)
+end
+strings.formatters={}
+if _LUAVERSION<5.2 then
+  function strings.formatters.new(noconcat)
+    local t={ _type_="formatter",_connector_=noconcat and "," or "..",_extensions_={},_preamble_=preamble,_environment_={} }
+    setmetatable(t,{ __index=make,__call=use })
+    return t
+  end
+else
+  function strings.formatters.new(noconcat)
+    local e={} 
+    for k,v in next,environment do
+      e[k]=v
+    end
+    local t={ _type_="formatter",_connector_=noconcat and "," or "..",_extensions_={},_preamble_="",_environment_=e }
+    setmetatable(t,{ __index=make,__call=use })
+    return t
+  end
+end
+local formatters=strings.formatters.new() 
+string.formatters=formatters 
+string.formatter=function(str,...) return formatters[str](...) end 
+local function add(t,name,template,preamble)
+  if type(t)=="table" and t._type_=="formatter" then
+    t._extensions_[name]=template or "%s"
+    if type(preamble)=="string" then
+      t._preamble_=preamble.."\n"..t._preamble_ 
+    elseif type(preamble)=="table" then
+      for k,v in next,preamble do
+        t._environment_[k]=v
+      end
+    end
+  end
+end
+strings.formatters.add=add
+patterns.xmlescape=Cs((P("<")/"&lt;"+P(">")/"&gt;"+P("&")/"&amp;"+P('"')/"&quot;"+P(1))^0)
+patterns.texescape=Cs((C(S("#$%\\{}"))/"\\%1"+P(1))^0)
+patterns.luaescape=Cs(((1-S('"\n'))^1+P('"')/'\\"'+P('\n')/'\\n"')^0) 
+patterns.luaquoted=Cs(Cc('"')*((1-S('"\n'))^1+P('"')/'\\"'+P('\n')/'\\n"')^0*Cc('"'))
+if _LUAVERSION<5.2 then
+  add(formatters,"xml",[[lpegmatch(xmlescape,%s)]],"local xmlescape = lpeg.patterns.xmlescape")
+  add(formatters,"tex",[[lpegmatch(texescape,%s)]],"local texescape = lpeg.patterns.texescape")
+  add(formatters,"lua",[[lpegmatch(luaescape,%s)]],"local luaescape = lpeg.patterns.luaescape")
+else
+  add(formatters,"xml",[[lpegmatch(xmlescape,%s)]],{ xmlescape=lpeg.patterns.xmlescape })
+  add(formatters,"tex",[[lpegmatch(texescape,%s)]],{ texescape=lpeg.patterns.texescape })
+  add(formatters,"lua",[[lpegmatch(luaescape,%s)]],{ luaescape=lpeg.patterns.luaescape })
+end
+local dquote=patterns.dquote 
+local equote=patterns.escaped+dquote/'\\"'+1
+local space=patterns.space
+local cquote=Cc('"')
+local pattern=Cs(dquote*(equote-P(-2))^0*dquote)          
++Cs(cquote*(equote-space)^0*space*equote^0*cquote) 
+function string.optionalquoted(str)
+  return lpegmatch(pattern,str) or str
+end
+local pattern=Cs((newline/(os.newline or "\r")+1)^0)
+function string.replacenewlines(str)
+  return lpegmatch(pattern,str)
+end
+function strings.newcollector()
+  local result,r={},0
+  return
+    function(fmt,str,...) 
+      r=r+1
+      result[r]=str==nil and fmt or formatters[fmt](str,...)
+    end,
+    function(connector) 
+      if result then
+        local str=concat(result,connector)
+        result,r={},0
+        return str
+      end
+    end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['util-fil']={
+  version=1.001,
+  comment="companion to luat-lib.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local byte=string.byte
+local char=string.char
+local extract=bit32 and bit32.extract
+local floor=math.floor
+utilities=utilities or {}
+local files={}
+utilities.files=files
+local zerobased={}
+function files.open(filename,zb)
+  local f=io.open(filename,"rb")
+  if f then
+    zerobased[f]=zb or false
+  end
+  return f
+end
+function files.close(f)
+  zerobased[f]=nil
+  f:close()
+end
+function files.size(f)
+  local current=f:seek()
+  local size=f:seek("end")
+  f:seek("set",current)
+  return size
+end
+files.getsize=files.size
+function files.setposition(f,n)
+  if zerobased[f] then
+    f:seek("set",n)
+  else
+    f:seek("set",n-1)
+  end
+end
+function files.getposition(f)
+  if zerobased[f] then
+    return f:seek()
+  else
+    return f:seek()+1
+  end
+end
+function files.look(f,n,chars)
+  local p=f:seek()
+  local s=f:read(n)
+  f:seek("set",p)
+  if chars then
+    return s
+  else
+    return byte(s,1,#s)
+  end
+end
+function files.skip(f,n)
+  if n==1 then
+    f:read(n)
+  else
+    f:seek("set",f:seek()+n)
+  end
+end
+function files.readbyte(f)
+  return byte(f:read(1))
+end
+function files.readbytes(f,n)
+  return byte(f:read(n),1,n)
+end
+function files.readbytetable(f,n)
+  local s=f:read(n or 1)
+  return { byte(s,1,#s) } 
+end
+function files.readchar(f)
+  return f:read(1)
+end
+function files.readstring(f,n)
+  return f:read(n or 1)
+end
+function files.readinteger1(f) 
+  local n=byte(f:read(1))
+  if n>=0x80 then
+    return n-0x100
+  else
+    return n
+  end
+end
+files.readcardinal1=files.readbyte 
+files.readcardinal=files.readcardinal1
+files.readinteger=files.readinteger1
+files.readsignedbyte=files.readinteger1
+function files.readcardinal2(f)
+  local a,b=byte(f:read(2),1,2)
+  return 0x100*a+b
+end
+function files.readcardinal2le(f)
+  local b,a=byte(f:read(2),1,2)
+  return 0x100*a+b
+end
+function files.readinteger2(f)
+  local a,b=byte(f:read(2),1,2)
+  if a>=0x80 then
+    return 0x100*a+b-0x10000
+  else
+    return 0x100*a+b
+  end
+end
+function files.readinteger2le(f)
+  local b,a=byte(f:read(2),1,2)
+  if a>=0x80 then
+    return 0x100*a+b-0x10000
+  else
+    return 0x100*a+b
+  end
+end
+function files.readcardinal3(f)
+  local a,b,c=byte(f:read(3),1,3)
+  return 0x10000*a+0x100*b+c
+end
+function files.readcardinal3le(f)
+  local c,b,a=byte(f:read(3),1,3)
+  return 0x10000*a+0x100*b+c
+end
+function files.readinteger3(f)
+  local a,b,c=byte(f:read(3),1,3)
+  if a>=0x80 then
+    return 0x10000*a+0x100*b+c-0x1000000
+  else
+    return 0x10000*a+0x100*b+c
+  end
+end
+function files.readinteger3le(f)
+  local c,b,a=byte(f:read(3),1,3)
+  if a>=0x80 then
+    return 0x10000*a+0x100*b+c-0x1000000
+  else
+    return 0x10000*a+0x100*b+c
+  end
+end
+function files.readcardinal4(f)
+  local a,b,c,d=byte(f:read(4),1,4)
+  return 0x1000000*a+0x10000*b+0x100*c+d
+end
+function files.readcardinal4le(f)
+  local d,c,b,a=byte(f:read(4),1,4)
+  return 0x1000000*a+0x10000*b+0x100*c+d
+end
+function files.readinteger4(f)
+  local a,b,c,d=byte(f:read(4),1,4)
+  if a>=0x80 then
+    return 0x1000000*a+0x10000*b+0x100*c+d-0x100000000
+  else
+    return 0x1000000*a+0x10000*b+0x100*c+d
+  end
+end
+function files.readinteger4le(f)
+  local d,c,b,a=byte(f:read(4),1,4)
+  if a>=0x80 then
+    return 0x1000000*a+0x10000*b+0x100*c+d-0x100000000
+  else
+    return 0x1000000*a+0x10000*b+0x100*c+d
+  end
+end
+function files.readfixed2(f)
+  local a,b=byte(f:read(2),1,2)
+  if a>=0x80 then
+    return (a-0x100)+b/0x100
+  else
+    return (a    )+b/0x100
+  end
+end
+function files.readfixed4(f)
+  local a,b,c,d=byte(f:read(4),1,4)
+  if a>=0x80 then
+    return (0x100*a+b-0x10000)+(0x100*c+d)/0x10000
+  else
+    return (0x100*a+b     )+(0x100*c+d)/0x10000
+  end
+end
+if extract then
+  local extract=bit32.extract
+  local band=bit32.band
+  function files.read2dot14(f)
+    local a,b=byte(f:read(2),1,2)
+    if a>=0x80 then
+      local n=-(0x100*a+b)
+      return-(extract(n,14,2)+(band(n,0x3FFF)/16384.0))
+    else
+      local n=0x100*a+b
+      return  (extract(n,14,2)+(band(n,0x3FFF)/16384.0))
+    end
+  end
+end
+function files.skipshort(f,n)
+  f:read(2*(n or 1))
+end
+function files.skiplong(f,n)
+  f:read(4*(n or 1))
+end
+function files.writecardinal2(f,n)
+  local a=char(n%256)
+  n=floor(n/256)
+  local b=char(n%256)
+  f:write(b,a)
+end
+function files.writecardinal4(f,n)
+  local a=char(n%256)
+  n=floor(n/256)
+  local b=char(n%256)
+  n=floor(n/256)
+  local c=char(n%256)
+  n=floor(n/256)
+  local d=char(n%256)
+  f:write(d,c,b,a)
+end
+function files.writestring(f,s)
+  f:write(char(byte(s,1,#s)))
+end
+function files.writebyte(f,b)
+  f:write(char(b))
+end
+if fio and fio.readcardinal1 then
+  files.readcardinal1=fio.readcardinal1
+  files.readcardinal2=fio.readcardinal2
+  files.readcardinal3=fio.readcardinal3
+  files.readcardinal4=fio.readcardinal4
+  files.readinteger1=fio.readinteger1
+  files.readinteger2=fio.readinteger2
+  files.readinteger3=fio.readinteger3
+  files.readinteger4=fio.readinteger4
+  files.read2dot14=fio.read2dot14
+  files.setposition=fio.setposition
+  files.getposition=fio.getposition
+  files.readbyte=files.readcardinal1
+  files.readsignedbyte=files.readinteger1
+  files.readcardinal=files.readcardinal1
+  files.readinteger=files.readinteger1
+  local skipposition=fio.skipposition
+  files.skipposition=skipposition
+  files.readbytes=fio.readbytes
+  files.readbytetable=fio.readbytetable
+  function files.skipshort(f,n)
+    skipposition(f,2*(n or 1))
+  end
+  function files.skiplong(f,n)
+    skipposition(f,4*(n or 1))
+  end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['luat-basics-gen']={
+  version=1.100,
+  comment="companion to luatex-*.tex",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+if context then
+  texio.write_nl("fatal error: this module is not for context")
+  os.exit()
+end
+local dummyfunction=function()
+end
+local dummyreporter=function(c)
+  return function(f,...)
+    local r=texio.reporter or texio.write_nl
+    if f then
+      r(c.." : "..string.formatters(f,...))
+    else
+      r("")
+    end
+  end
+end
+statistics={
+  register=dummyfunction,
+  starttiming=dummyfunction,
+  stoptiming=dummyfunction,
+  elapsedtime=nil,
+}
+directives={
+  register=dummyfunction,
+  enable=dummyfunction,
+  disable=dummyfunction,
+}
+trackers={
+  register=dummyfunction,
+  enable=dummyfunction,
+  disable=dummyfunction,
+}
+experiments={
+  register=dummyfunction,
+  enable=dummyfunction,
+  disable=dummyfunction,
+}
+storage={ 
+  register=dummyfunction,
+  shared={},
+}
+logs={
+  new=dummyreporter,
+  reporter=dummyreporter,
+  messenger=dummyreporter,
+  report=dummyfunction,
+}
+callbacks={
+  register=function(n,f)
+    return callback.register(n,f)
+  end,
+}
+utilities=utilities or {} utilities.storage={
+  allocate=function(t)
+    return t or {}
+  end,
+  mark=function(t)
+    return t or {}
+  end,
+}
+characters=characters or {
+  data={}
+}
+texconfig.kpse_init=true
+resolvers=resolvers or {} 
+local remapper={
+  otf="opentype fonts",
+  ttf="truetype fonts",
+  ttc="truetype fonts",
+  cid="cid maps",
+  cidmap="cid maps",
+  pfb="type1 fonts",
+  afm="afm",
+  enc="enc files",
+}
+function resolvers.findfile(name,fileformat)
+  name=string.gsub(name,"\\","/")
+  if not fileformat or fileformat=="" then
+    fileformat=file.suffix(name)
+    if fileformat=="" then
+      fileformat="tex"
+    end
+  end
+  fileformat=string.lower(fileformat)
+  fileformat=remapper[fileformat] or fileformat
+  local found=kpse.find_file(name,fileformat)
+  if not found or found=="" then
+    found=kpse.find_file(name,"other text files")
+  end
+  return found
+end
+resolvers.findbinfile=resolvers.findfile
+function resolvers.loadbinfile(filename,filetype)
+  local data=io.loaddata(filename)
+  return true,data,#data
+end
+function resolvers.resolve(s)
+  return s
+end
+function resolvers.unresolve(s)
+  return s
+end
+caches={}
+local writable=nil
+local readables={}
+local usingjit=jit
+if not caches.namespace or caches.namespace=="" or caches.namespace=="context" then
+  caches.namespace='generic'
+end
+do
+  local cachepaths=kpse.expand_var('$TEXMFCACHE') or ""
+  if cachepaths=="" or cachepaths=="$TEXMFCACHE" then
+    cachepaths=kpse.expand_var('$TEXMFVAR') or ""
+  end
+  if cachepaths=="" or cachepaths=="$TEXMFVAR" then
+    cachepaths=kpse.expand_var('$VARTEXMF') or ""
+  end
+  if cachepaths=="" then
+    local fallbacks={ "TMPDIR","TEMPDIR","TMP","TEMP","HOME","HOMEPATH" }
+    for i=1,#fallbacks do
+      cachepaths=os.getenv(fallbacks[i]) or ""
+      if cachepath~="" and lfs.isdir(cachepath) then
+        break
+      end
+    end
+  end
+  if cachepaths=="" then
+    cachepaths="."
+  end
+  cachepaths=string.split(cachepaths,os.type=="windows" and ";" or ":")
+  for i=1,#cachepaths do
+    local cachepath=cachepaths[i]
+    if not lfs.isdir(cachepath) then
+      lfs.mkdirs(cachepath) 
+      if lfs.isdir(cachepath) then
+        texio.write(string.format("(created cache path: %s)",cachepath))
+      end
+    end
+    if file.is_writable(cachepath) then
+      writable=file.join(cachepath,"luatex-cache")
+      lfs.mkdir(writable)
+      writable=file.join(writable,caches.namespace)
+      lfs.mkdir(writable)
+      break
+    end
+  end
+  for i=1,#cachepaths do
+    if file.is_readable(cachepaths[i]) then
+      readables[#readables+1]=file.join(cachepaths[i],"luatex-cache",caches.namespace)
+    end
+  end
+  if not writable then
+    texio.write_nl("quiting: fix your writable cache path")
+    os.exit()
+  elseif #readables==0 then
+    texio.write_nl("quiting: fix your readable cache path")
+    os.exit()
+  elseif #readables==1 and readables[1]==writable then
+    texio.write(string.format("(using cache: %s)",writable))
+  else
+    texio.write(string.format("(using write cache: %s)",writable))
+    texio.write(string.format("(using read cache: %s)",table.concat(readables," ")))
+  end
+end
+function caches.getwritablepath(category,subcategory)
+  local path=file.join(writable,category)
+  lfs.mkdir(path)
+  path=file.join(path,subcategory)
+  lfs.mkdir(path)
+  return path
+end
+function caches.getreadablepaths(category,subcategory)
+  local t={}
+  for i=1,#readables do
+    t[i]=file.join(readables[i],category,subcategory)
+  end
+  return t
+end
+local function makefullname(path,name)
+  if path and path~="" then
+    return file.addsuffix(file.join(path,name),"lua"),file.addsuffix(file.join(path,name),usingjit and "lub" or "luc")
+  end
+end
+function caches.is_writable(path,name)
+  local fullname=makefullname(path,name)
+  return fullname and file.is_writable(fullname)
+end
+function caches.loaddata(readables,name,writable)
+  for i=1,#readables do
+    local path=readables[i]
+    local loader=false
+    local luaname,lucname=makefullname(path,name)
+    if lfs.isfile(lucname) then
+      texio.write(string.format("(load luc: %s)",lucname))
+      loader=loadfile(lucname)
+    end
+    if not loader and lfs.isfile(luaname) then
+      local luacrap,lucname=makefullname(writable,name)
+      texio.write(string.format("(compiling luc: %s)",lucname))
+      if lfs.isfile(lucname) then
+        loader=loadfile(lucname)
+      end
+      caches.compile(data,luaname,lucname)
+      if lfs.isfile(lucname) then
+        texio.write(string.format("(load luc: %s)",lucname))
+        loader=loadfile(lucname)
+      else
+        texio.write(string.format("(loading failed: %s)",lucname))
+      end
+      if not loader then
+        texio.write(string.format("(load lua: %s)",luaname))
+        loader=loadfile(luaname)
+      else
+        texio.write(string.format("(loading failed: %s)",luaname))
+      end
+    end
+    if loader then
+      loader=loader()
+      collectgarbage("step")
+      return loader
+    end
+  end
+  return false
+end
+function caches.savedata(path,name,data)
+  local luaname,lucname=makefullname(path,name)
+  if luaname then
+    texio.write(string.format("(save: %s)",luaname))
+    table.tofile(luaname,data,true)
+    if lucname and type(caches.compile)=="function" then
+      os.remove(lucname) 
+      texio.write(string.format("(save: %s)",lucname))
+      caches.compile(data,luaname,lucname)
+    end
+  end
+end
+function caches.compile(data,luaname,lucname)
+  local d=io.loaddata(luaname)
+  if not d or d=="" then
+    d=table.serialize(data,true) 
+  end
+  if d and d~="" then
+    local f=io.open(lucname,'wb')
+    if f then
+      local s=loadstring(d)
+      if s then
+        f:write(string.dump(s,true))
+      end
+      f:close()
+    end
+  end
+end
+function table.setmetatableindex(t,f)
+  if type(t)~="table" then
+    f,t=t,{}
+  end
+  local m=getmetatable(t)
+  if f=="table" then
+    f=function(t,k) local v={} t[k]=v return v end
+  end
+  if m then
+    m.__index=f
+  else
+    setmetatable(t,{ __index=f })
+  end
+  return t
+end
+arguments={}
+if arg then
+  for i=1,#arg do
+    local k,v=string.match(arg[i],"^%-%-([^=]+)=?(.-)$")
+    if k and v then
+      arguments[k]=v
+    end
+  end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['data-con']={
+  version=1.100,
+  comment="companion to luat-lib.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local format,lower,gsub=string.format,string.lower,string.gsub
+local trace_cache=false trackers.register("resolvers.cache",function(v) trace_cache=v end)
+local trace_containers=false trackers.register("resolvers.containers",function(v) trace_containers=v end)
+local trace_storage=false trackers.register("resolvers.storage",function(v) trace_storage=v end)
+containers=containers or {}
+local containers=containers
+containers.usecache=true
+local report_containers=logs.reporter("resolvers","containers")
+local allocated={}
+local mt={
+  __index=function(t,k)
+    if k=="writable" then
+      local writable=caches.getwritablepath(t.category,t.subcategory) or { "." }
+      t.writable=writable
+      return writable
+    elseif k=="readables" then
+      local readables=caches.getreadablepaths(t.category,t.subcategory) or { "." }
+      t.readables=readables
+      return readables
+    end
+  end,
+  __storage__=true
+}
+function containers.define(category,subcategory,version,enabled)
+  if category and subcategory then
+    local c=allocated[category]
+    if not c then
+      c={}
+      allocated[category]=c
+    end
+    local s=c[subcategory]
+    if not s then
+      s={
+        category=category,
+        subcategory=subcategory,
+        storage={},
+        enabled=enabled,
+        version=version or math.pi,
+        trace=false,
+      }
+      setmetatable(s,mt)
+      c[subcategory]=s
+    end
+    return s
+  end
+end
+function containers.is_usable(container,name)
+  return container.enabled and caches and caches.is_writable(container.writable,name)
+end
+function containers.is_valid(container,name)
+  if name and name~="" then
+    local storage=container.storage[name]
+    return storage and storage.cache_version==container.version
+  else
+    return false
+  end
+end
+function containers.read(container,name)
+  local storage=container.storage
+  local stored=storage[name]
+  if not stored and container.enabled and caches and containers.usecache then
+    stored=caches.loaddata(container.readables,name,container.writable)
+    if stored and stored.cache_version==container.version then
+      if trace_cache or trace_containers then
+        report_containers("action %a, category %a, name %a","load",container.subcategory,name)
+      end
+    else
+      stored=nil
+    end
+    storage[name]=stored
+  elseif stored then
+    if trace_cache or trace_containers then
+      report_containers("action %a, category %a, name %a","reuse",container.subcategory,name)
+    end
+  end
+  return stored
+end
+function containers.write(container,name,data)
+  if data then
+    data.cache_version=container.version
+    if container.enabled and caches then
+      local unique,shared=data.unique,data.shared
+      data.unique,data.shared=nil,nil
+      caches.savedata(container.writable,name,data)
+      if trace_cache or trace_containers then
+        report_containers("action %a, category %a, name %a","save",container.subcategory,name)
+      end
+      data.unique,data.shared=unique,shared
+    end
+    if trace_cache or trace_containers then
+      report_containers("action %a, category %a, name %a","store",container.subcategory,name)
+    end
+    container.storage[name]=data
+  end
+  return data
+end
+function containers.content(container,name)
+  return container.storage[name]
+end
+function containers.cleanname(name)
+  return (gsub(lower(name),"[^%w\128-\255]+","-")) 
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['luatex-fonts-nod']={
+  version=1.001,
+  comment="companion to luatex-fonts.lua",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+if context then
+  texio.write_nl("fatal error: this module is not for context")
+  os.exit()
+end
+if tex.attribute[0]~=0 then
+  texio.write_nl("log","!")
+  texio.write_nl("log","! Attribute 0 is reserved for ConTeXt's font feature management and has to be")
+  texio.write_nl("log","! set to zero. Also, some attributes in the range 1-255 are used for special")
+  texio.write_nl("log","! purposes so setting them at the TeX end might break the font handler.")
+  texio.write_nl("log","!")
+  tex.attribute[0]=0 
+end
+attributes=attributes or {}
+attributes.unsetvalue=-0x7FFFFFFF
+local numbers,last={},127
+attributes.private=attributes.private or function(name)
+  local number=numbers[name]
+  if not number then
+    if last<255 then
+      last=last+1
+    end
+    number=last
+    numbers[name]=number
+  end
+  return number
+end
+nodes={}
+nodes.handlers={}
+local nodecodes={}
+local glyphcodes=node.subtypes("glyph")
+local disccodes=node.subtypes("disc")
+for k,v in next,node.types() do
+  v=string.gsub(v,"_","")
+  nodecodes[k]=v
+  nodecodes[v]=k
+end
+for i=0,#glyphcodes do
+  glyphcodes[glyphcodes[i]]=i
+end
+for i=0,#disccodes do
+  disccodes[disccodes[i]]=i
+end
+nodes.nodecodes=nodecodes
+nodes.glyphcodes=glyphcodes
+nodes.disccodes=disccodes
+local flush_node=node.flush_node
+local remove_node=node.remove
+local traverse_id=node.traverse_id
+nodes.handlers.protectglyphs=node.protect_glyphs
+nodes.handlers.unprotectglyphs=node.unprotect_glyphs
+local math_code=nodecodes.math
+local end_of_math=node.end_of_math
+function node.end_of_math(n)
+  if n.id==math_code and n.subtype==1 then
+    return n
+  else
+    return end_of_math(n)
+  end
+end
+function nodes.remove(head,current,free_too)
+  local t=current
+  head,current=remove_node(head,current)
+  if t then
+    if free_too then
+      flush_node(t)
+      t=nil
+    else
+      t.next,t.prev=nil,nil
+    end
+  end
+  return head,current,t
+end
+function nodes.delete(head,current)
+  return nodes.remove(head,current,true)
+end
+local getfield=node.getfield
+local setfield=node.setfield
+nodes.getfield=getfield
+nodes.setfield=setfield
+nodes.getattr=getfield
+nodes.setattr=setfield
+nodes.tostring=node.tostring or tostring
+nodes.copy=node.copy
+nodes.copy_node=node.copy
+nodes.copy_list=node.copy_list
+nodes.delete=node.delete
+nodes.dimensions=node.dimensions
+nodes.end_of_math=node.end_of_math
+nodes.flush_list=node.flush_list
+nodes.flush_node=node.flush_node
+nodes.flush=node.flush_node
+nodes.free=node.free
+nodes.insert_after=node.insert_after
+nodes.insert_before=node.insert_before
+nodes.hpack=node.hpack
+nodes.new=node.new
+nodes.tail=node.tail
+nodes.traverse=node.traverse
+nodes.traverse_id=node.traverse_id
+nodes.slide=node.slide
+nodes.vpack=node.vpack
+nodes.first_glyph=node.first_glyph
+nodes.has_glyph=node.has_glyph or node.first_glyph
+nodes.current_attr=node.current_attr
+nodes.has_field=node.has_field
+nodes.last_node=node.last_node
+nodes.usedlist=node.usedlist
+nodes.protrusion_skippable=node.protrusion_skippable
+nodes.write=node.write
+nodes.has_attribute=node.has_attribute
+nodes.set_attribute=node.set_attribute
+nodes.unset_attribute=node.unset_attribute
+nodes.protect_glyphs=node.protect_glyphs
+nodes.unprotect_glyphs=node.unprotect_glyphs
+nodes.mlist_to_hlist=node.mlist_to_hlist
+local direct=node.direct
+local nuts={}
+nodes.nuts=nuts
+local tonode=direct.tonode
+local tonut=direct.todirect
+nodes.tonode=tonode
+nodes.tonut=tonut
+nuts.tonode=tonode
+nuts.tonut=tonut
+local getfield=direct.getfield
+local setfield=direct.setfield
+nuts.getfield=getfield
+nuts.setfield=setfield
+nuts.getnext=direct.getnext
+nuts.setnext=direct.setnext
+nuts.getprev=direct.getprev
+nuts.setprev=direct.setprev
+nuts.getboth=direct.getboth
+nuts.setboth=direct.setboth
+nuts.getid=direct.getid
+nuts.getattr=direct.get_attribute or direct.has_attribute or getfield
+nuts.setattr=setfield
+nuts.getfont=direct.getfont
+nuts.setfont=direct.setfont
+nuts.getsubtype=direct.getsubtype
+nuts.setsubtype=direct.setsubtype
+nuts.getchar=direct.getchar
+nuts.setchar=direct.setchar
+nuts.getdisc=direct.getdisc
+nuts.setdisc=direct.setdisc
+nuts.setlink=direct.setlink
+nuts.setsplit=direct.setsplit
+nuts.getlist=direct.getlist
+nuts.setlist=direct.setlist
+nuts.getoffsets=direct.getoffsets or
+  function(n)
+    return getfield(n,"xoffset"),getfield(n,"yoffset")
+  end
+nuts.setoffsets=direct.setoffsets or
+  function(n,x,y)
+    if x then setfield(n,"xoffset",x) end
+    if y then setfield(n,"xoffset",y) end
+  end
+nuts.getleader=direct.getleader   or function(n)  return getfield(n,"leader")    end
+nuts.setleader=direct.setleader   or function(n,l)    setfield(n,"leader",l)   end
+nuts.getcomponents=direct.getcomponents or function(n)  return getfield(n,"components")  end
+nuts.setcomponents=direct.setcomponents or function(n,c)    setfield(n,"components",c) end
+nuts.getkern=direct.getkern    or function(n)  return getfield(n,"kern")     end
+nuts.setkern=direct.setkern    or function(n,k)    setfield(n,"kern",k)    end
+nuts.getdir=direct.getdir    or function(n)  return getfield(n,"dir")     end
+nuts.setdir=direct.setdir    or function(n,d)    setfield(n,"dir",d)    end
+nuts.getwidth=direct.getwidth   or function(n)  return getfield(n,"width")    end
+nuts.setwidth=direct.setwidth   or function(n,w) return setfield(n,"width",w)   end
+nuts.getheight=direct.getheight   or function(n)  return getfield(n,"height")    end
+nuts.setheight=direct.setheight   or function(n,h) return setfield(n,"height",h)   end
+nuts.getdepth=direct.getdepth   or function(n)  return getfield(n,"depth")    end
+nuts.setdepth=direct.setdepth   or function(n,d) return setfield(n,"depth",d)   end
+if not direct.is_glyph then
+  local getchar=direct.getchar
+  local getid=direct.getid
+  local getfont=direct.getfont
+  local glyph_code=nodes.nodecodes.glyph
+  function direct.is_glyph(n,f)
+    local id=getid(n)
+    if id==glyph_code then
+      if f and getfont(n)==f then
+        return getchar(n)
+      else
+        return false
+      end
+    else
+      return nil,id
+    end
+  end
+  function direct.is_char(n,f)
+    local id=getid(n)
+    if id==glyph_code then
+      if getsubtype(n)>=256 then
+        return false
+      elseif f and getfont(n)==f then
+        return getchar(n)
+      else
+        return false
+      end
+    else
+      return nil,id
+    end
+  end
+end
+nuts.ischar=direct.is_char
+nuts.is_char=direct.is_char
+nuts.isglyph=direct.is_glyph
+nuts.is_glyph=direct.is_glyph
+nuts.insert_before=direct.insert_before
+nuts.insert_after=direct.insert_after
+nuts.delete=direct.delete
+nuts.copy=direct.copy
+nuts.copy_node=direct.copy
+nuts.copy_list=direct.copy_list
+nuts.tail=direct.tail
+nuts.flush_list=direct.flush_list
+nuts.flush_node=direct.flush_node
+nuts.flush=direct.flush
+nuts.free=direct.free
+nuts.remove=direct.remove
+nuts.is_node=direct.is_node
+nuts.end_of_math=direct.end_of_math
+nuts.traverse=direct.traverse
+nuts.traverse_id=direct.traverse_id
+nuts.traverse_char=direct.traverse_char
+nuts.ligaturing=direct.ligaturing
+nuts.kerning=direct.kerning
+nuts.new=direct.new
+nuts.getprop=nuts.getattr
+nuts.setprop=nuts.setattr
+local propertydata=direct.get_properties_table()
+nodes.properties={ data=propertydata }
+direct.set_properties_mode(true,true)   
+function direct.set_properties_mode() end 
+nuts.getprop=function(n,k)
+  local p=propertydata[n]
+  if p then
+    return p[k]
+  end
+end
+nuts.setprop=function(n,k,v)
+  if v then
+    local p=propertydata[n]
+    if p then
+      p[k]=v
+    else
+      propertydata[n]={ [k]=v }
+    end
+  end
+end
+nodes.setprop=nodes.setproperty
+nodes.getprop=nodes.getproperty
+local setprev=nuts.setprev
+local setnext=nuts.setnext
+local getnext=nuts.getnext
+local setlink=nuts.setlink
+local getfield=nuts.getfield
+local setfield=nuts.setfield
+local getcomponents=nuts.getcomponents
+local setcomponents=nuts.setcomponents
+local find_tail=nuts.tail
+local flush_list=nuts.flush_list
+local flush_node=nuts.flush_node
+local traverse_id=nuts.traverse_id
+local copy_node=nuts.copy_node
+local glyph_code=nodes.nodecodes.glyph
+function nuts.set_components(target,start,stop)
+  local head=getcomponents(target)
+  if head then
+    flush_list(head)
+    head=nil
+  end
+  if start then
+    setprev(start)
+  else
+    return nil
+  end
+  if stop then
+    setnext(stop)
+  end
+  local tail=nil
+  while start do
+    local c=getcomponents(start)
+    local n=getnext(start)
+    if c then
+      if head then
+        setlink(tail,c)
+      else
+        head=c
+      end
+      tail=find_tail(c)
+      setcomponents(start)
+      flush_node(start)
+    else
+      if head then
+        setlink(tail,start)
+      else
+        head=start
+      end
+      tail=start
+    end
+    start=n
+  end
+  setcomponents(target,head)
+  return head
+end
+nuts.get_components=nuts.getcomponents
+function nuts.take_components(target)
+  local c=getcomponents(target)
+  setcomponents(target)
+  return c
+end
+function nuts.count_components(n,marks)
+  local components=getcomponents(n)
+  if components then
+    if marks then
+      local i=0
+      for g in traverse_id(glyph_code,components) do
+        if not marks[getchar(g)] then
+          i=i+1
+        end
+      end
+      return i
+    else
+      return count(glyph_code,components)
+    end
+  else
+    return 0
+  end
+end
+function nuts.copy_no_components(g,copyinjection)
+  local components=getcomponents(g)
+  if components then
+    setcomponents(g)
+    local n=copy_node(g)
+    if copyinjection then
+      copyinjection(n,g)
+    end
+    setcomponents(g,components)
+    return n
+  else
+    local n=copy_node(g)
+    if copyinjection then
+      copyinjection(n,g)
+    end
+    return n
+  end
+end
+function nuts.copy_only_glyphs(current)
+  local head=nil
+  local previous=nil
+  for n in traverse_id(glyph_code,current) do
+    n=copy_node(n)
+    if head then
+      setlink(previous,n)
+    else
+      head=n
+    end
+    previous=n
+  end
+  return head
+end
+nuts.uses_font=direct.uses_font
+if not nuts.uses_font then
+  local getdisc=nuts.getdisc
+  local getfont=nuts.getfont
+  function nuts.uses_font(n,font)
+    local pre,post,replace=getdisc(n)
+    if pre then
+      for n in traverse_id(glyph_code,pre) do
+        if getfont(n)==font then
+          return true
+        end
+      end
+    end
+    if post then
+      for n in traverse_id(glyph_code,post) do
+        if getfont(n)==font then
+          return true
+        end
+      end
+    end
+    if replace then
+      for n in traverse_id(glyph_code,replace) do
+        if getfont(n)==font then
+          return true
+        end
+      end
+    end
+    return false
+  end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+
+characters=characters or {}
+characters.blockrange={}
+characters.classifiers={
+ [768]=5,
+ [769]=5,
+ [770]=5,
+ [771]=5,
+ [772]=5,
+ [773]=5,
+ [774]=5,
+ [775]=5,
+ [776]=5,
+ [777]=5,
+ [778]=5,
+ [779]=5,
+ [780]=5,
+ [781]=5,
+ [782]=5,
+ [783]=5,
+ [784]=5,
+ [785]=5,
+ [786]=5,
+ [787]=5,
+ [788]=5,
+ [789]=5,
+ [790]=5,
+ [791]=5,
+ [792]=5,
+ [793]=5,
+ [794]=5,
+ [795]=5,
+ [796]=5,
+ [797]=5,
+ [798]=5,
+ [799]=5,
+ [800]=5,
+ [801]=5,
+ [802]=5,
+ [803]=5,
+ [804]=5,
+ [805]=5,
+ [806]=5,
+ [807]=5,
+ [808]=5,
+ [809]=5,
+ [810]=5,
+ [811]=5,
+ [812]=5,
+ [813]=5,
+ [814]=5,
+ [815]=5,
+ [816]=5,
+ [817]=5,
+ [818]=5,
+ [819]=5,
+ [820]=5,
+ [821]=5,
+ [822]=5,
+ [823]=5,
+ [824]=5,
+ [825]=5,
+ [826]=5,
+ [827]=5,
+ [828]=5,
+ [829]=5,
+ [830]=5,
+ [831]=5,
+ [832]=5,
+ [833]=5,
+ [834]=5,
+ [835]=5,
+ [836]=5,
+ [837]=5,
+ [838]=5,
+ [839]=5,
+ [840]=5,
+ [841]=5,
+ [842]=5,
+ [843]=5,
+ [844]=5,
+ [845]=5,
+ [846]=5,
+ [847]=5,
+ [848]=5,
+ [849]=5,
+ [850]=5,
+ [851]=5,
+ [852]=5,
+ [853]=5,
+ [854]=5,
+ [855]=5,
+ [856]=5,
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+ [1822]=3,
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+ [1886]=2,
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+ [1888]=2,
+ [1889]=2,
+ [1890]=2,
+ [1891]=2,
+ [1892]=2,
+ [1893]=2,
+ [1894]=2,
+ [1895]=2,
+ [1896]=2,
+ [1897]=2,
+ [1898]=2,
+ [1899]=3,
+ [1900]=3,
+ [1901]=2,
+ [1902]=2,
+ [1903]=2,
+ [1904]=2,
+ [1905]=3,
+ [1906]=2,
+ [1907]=3,
+ [1908]=3,
+ [1909]=2,
+ [1910]=2,
+ [1911]=2,
+ [1912]=3,
+ [1913]=3,
+ [1914]=2,
+ [1915]=2,
+ [1916]=2,
+ [1917]=2,
+ [1918]=2,
+ [1919]=2,
+ [1958]=5,
+ [1959]=5,
+ [1960]=5,
+ [1961]=5,
+ [1962]=5,
+ [1963]=5,
+ [1964]=5,
+ [1965]=5,
+ [1966]=5,
+ [1967]=5,
+ [1968]=5,
+ [1984]=6,
+ [1985]=6,
+ [1986]=6,
+ [1987]=6,
+ [1988]=6,
+ [1989]=6,
+ [1990]=6,
+ [1991]=6,
+ [1992]=6,
+ [1993]=6,
+ [1994]=2,
+ [1995]=2,
+ [1996]=2,
+ [1997]=2,
+ [1998]=2,
+ [1999]=2,
+ [2000]=2,
+ [2001]=2,
+ [2002]=2,
+ [2003]=2,
+ [2004]=2,
+ [2005]=2,
+ [2006]=2,
+ [2007]=2,
+ [2008]=2,
+ [2009]=2,
+ [2010]=2,
+ [2011]=2,
+ [2012]=2,
+ [2013]=2,
+ [2014]=2,
+ [2015]=2,
+ [2016]=2,
+ [2017]=2,
+ [2018]=2,
+ [2019]=2,
+ [2020]=2,
+ [2021]=2,
+ [2022]=2,
+ [2023]=2,
+ [2024]=2,
+ [2025]=2,
+ [2026]=2,
+ [2027]=5,
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+ [2036]=6,
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+ [2042]=2,
+ [2070]=5,
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+ [2112]=3,
+ [2113]=2,
+ [2114]=2,
+ [2115]=2,
+ [2116]=2,
+ [2117]=2,
+ [2118]=3,
+ [2119]=3,
+ [2120]=2,
+ [2121]=3,
+ [2122]=2,
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+ [2125]=2,
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+ [2132]=3,
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+ [2134]=4,
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+ [2208]=2,
+ [2209]=2,
+ [2210]=2,
+ [2211]=2,
+ [2212]=2,
+ [2213]=2,
+ [2214]=2,
+ [2215]=2,
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+ [2218]=3,
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+ [2221]=4,
+ [2222]=3,
+ [2223]=2,
+ [2224]=2,
+ [2225]=3,
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+ [2227]=2,
+ [2228]=2,
+ [2230]=2,
+ [2231]=2,
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+ [2260]=5,
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+ [4212]=5,
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+ [6075]=5,
+ [6076]=5,
+ [6077]=5,
+ [6086]=5,
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+ [119363]=5,
+ [119364]=5,
+ [121344]=5,
+ [121345]=5,
+ [121346]=5,
+ [121347]=5,
+ [121348]=5,
+ [121349]=5,
+ [121350]=5,
+ [121351]=5,
+ [121352]=5,
+ [121353]=5,
+ [121354]=5,
+ [121355]=5,
+ [121356]=5,
+ [121357]=5,
+ [121358]=5,
+ [121359]=5,
+ [121360]=5,
+ [121361]=5,
+ [121362]=5,
+ [121363]=5,
+ [121364]=5,
+ [121365]=5,
+ [121366]=5,
+ [121367]=5,
+ [121368]=5,
+ [121369]=5,
+ [121370]=5,
+ [121371]=5,
+ [121372]=5,
+ [121373]=5,
+ [121374]=5,
+ [121375]=5,
+ [121376]=5,
+ [121377]=5,
+ [121378]=5,
+ [121379]=5,
+ [121380]=5,
+ [121381]=5,
+ [121382]=5,
+ [121383]=5,
+ [121384]=5,
+ [121385]=5,
+ [121386]=5,
+ [121387]=5,
+ [121388]=5,
+ [121389]=5,
+ [121390]=5,
+ [121391]=5,
+ [121392]=5,
+ [121393]=5,
+ [121394]=5,
+ [121395]=5,
+ [121396]=5,
+ [121397]=5,
+ [121398]=5,
+ [121403]=5,
+ [121404]=5,
+ [121405]=5,
+ [121406]=5,
+ [121407]=5,
+ [121408]=5,
+ [121409]=5,
+ [121410]=5,
+ [121411]=5,
+ [121412]=5,
+ [121413]=5,
+ [121414]=5,
+ [121415]=5,
+ [121416]=5,
+ [121417]=5,
+ [121418]=5,
+ [121419]=5,
+ [121420]=5,
+ [121421]=5,
+ [121422]=5,
+ [121423]=5,
+ [121424]=5,
+ [121425]=5,
+ [121426]=5,
+ [121427]=5,
+ [121428]=5,
+ [121429]=5,
+ [121430]=5,
+ [121431]=5,
+ [121432]=5,
+ [121433]=5,
+ [121434]=5,
+ [121435]=5,
+ [121436]=5,
+ [121437]=5,
+ [121438]=5,
+ [121439]=5,
+ [121440]=5,
+ [121441]=5,
+ [121442]=5,
+ [121443]=5,
+ [121444]=5,
+ [121445]=5,
+ [121446]=5,
+ [121447]=5,
+ [121448]=5,
+ [121449]=5,
+ [121450]=5,
+ [121451]=5,
+ [121452]=5,
+ [121461]=5,
+ [121476]=5,
+ [121499]=5,
+ [121500]=5,
+ [121501]=5,
+ [121502]=5,
+ [121503]=5,
+ [121505]=5,
+ [121506]=5,
+ [121507]=5,
+ [121508]=5,
+ [121509]=5,
+ [121510]=5,
+ [121511]=5,
+ [121512]=5,
+ [121513]=5,
+ [121514]=5,
+ [121515]=5,
+ [121516]=5,
+ [121517]=5,
+ [121518]=5,
+ [121519]=5,
+ [122880]=5,
+ [122881]=5,
+ [122882]=5,
+ [122883]=5,
+ [122884]=5,
+ [122885]=5,
+ [122886]=5,
+ [122888]=5,
+ [122889]=5,
+ [122890]=5,
+ [122891]=5,
+ [122892]=5,
+ [122893]=5,
+ [122894]=5,
+ [122895]=5,
+ [122896]=5,
+ [122897]=5,
+ [122898]=5,
+ [122899]=5,
+ [122900]=5,
+ [122901]=5,
+ [122902]=5,
+ [122903]=5,
+ [122904]=5,
+ [122907]=5,
+ [122908]=5,
+ [122909]=5,
+ [122910]=5,
+ [122911]=5,
+ [122912]=5,
+ [122913]=5,
+ [122915]=5,
+ [122916]=5,
+ [122918]=5,
+ [122919]=5,
+ [122920]=5,
+ [122921]=5,
+ [122922]=5,
+ [125136]=5,
+ [125137]=5,
+ [125138]=5,
+ [125139]=5,
+ [125140]=5,
+ [125141]=5,
+ [125142]=5,
+ [125184]=2,
+ [125185]=2,
+ [125186]=2,
+ [125187]=2,
+ [125188]=2,
+ [125189]=2,
+ [125190]=2,
+ [125191]=2,
+ [125192]=2,
+ [125193]=2,
+ [125194]=2,
+ [125195]=2,
+ [125196]=2,
+ [125197]=2,
+ [125198]=2,
+ [125199]=2,
+ [125200]=2,
+ [125201]=2,
+ [125202]=2,
+ [125203]=2,
+ [125204]=2,
+ [125205]=2,
+ [125206]=2,
+ [125207]=2,
+ [125208]=2,
+ [125209]=2,
+ [125210]=2,
+ [125211]=2,
+ [125212]=2,
+ [125213]=2,
+ [125214]=2,
+ [125215]=2,
+ [125216]=2,
+ [125217]=2,
+ [125218]=2,
+ [125219]=2,
+ [125220]=2,
+ [125221]=2,
+ [125222]=2,
+ [125223]=2,
+ [125224]=2,
+ [125225]=2,
+ [125226]=2,
+ [125227]=2,
+ [125228]=2,
+ [125229]=2,
+ [125230]=2,
+ [125231]=2,
+ [125232]=2,
+ [125233]=2,
+ [125234]=2,
+ [125235]=2,
+ [125236]=2,
+ [125237]=2,
+ [125238]=2,
+ [125239]=2,
+ [125240]=2,
+ [125241]=2,
+ [125242]=2,
+ [125243]=2,
+ [125244]=2,
+ [125245]=2,
+ [125246]=2,
+ [125247]=2,
+ [125248]=2,
+ [125249]=2,
+ [125250]=2,
+ [125251]=2,
+ [125252]=5,
+ [125253]=5,
+ [125254]=5,
+ [125255]=5,
+ [125256]=5,
+ [125257]=5,
+ [125258]=5,
+ [1042752]=5,
+}
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-ini']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local allocate=utilities.storage.allocate
+fonts=fonts or {}
+local fonts=fonts
+fonts.hashes={ identifiers=allocate() }
+fonts.tables=fonts.tables   or {}
+fonts.helpers=fonts.helpers  or {}
+fonts.tracers=fonts.tracers  or {} 
+fonts.specifiers=fonts.specifiers or {} 
+fonts.analyzers={} 
+fonts.readers={}
+fonts.definers={ methods={} }
+fonts.loggers={ register=function() end }
+if context then
+  fontloader=nil
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-con']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local next,tostring,tonumber,rawget=next,tostring,tonumber,rawget
+local format,match,lower,gsub,find=string.format,string.match,string.lower,string.gsub,string.find
+local sort,insert,concat=table.sort,table.insert,table.concat
+local sortedkeys,sortedhash,serialize,fastcopy=table.sortedkeys,table.sortedhash,table.serialize,table.fastcopy
+local derivetable=table.derive
+local ioflush=io.flush
+local trace_defining=false trackers.register("fonts.defining",function(v) trace_defining=v end)
+local trace_scaling=false trackers.register("fonts.scaling",function(v) trace_scaling=v end)
+local report_defining=logs.reporter("fonts","defining")
+local fonts=fonts
+local constructors=fonts.constructors or {}
+fonts.constructors=constructors
+local handlers=fonts.handlers or {} 
+fonts.handlers=handlers
+local allocate=utilities.storage.allocate
+local setmetatableindex=table.setmetatableindex
+constructors.dontembed=allocate()
+constructors.autocleanup=true
+constructors.namemode="fullpath" 
+constructors.version=1.01
+constructors.cache=containers.define("fonts","constructors",constructors.version,false)
+constructors.privateoffset=0xF0000 
+constructors.cacheintex=true
+local designsizes=allocate()
+constructors.designsizes=designsizes
+local loadedfonts=allocate()
+constructors.loadedfonts=loadedfonts
+local factors={
+  pt=65536.0,
+  bp=65781.8,
+}
+function constructors.setfactor(f)
+  constructors.factor=factors[f or 'pt'] or factors.pt
+end
+constructors.setfactor()
+function constructors.scaled(scaledpoints,designsize) 
+  if scaledpoints<0 then
+    local factor=constructors.factor
+    if designsize then
+      if designsize>factor then 
+        return (- scaledpoints/1000)*designsize 
+      else
+        return (- scaledpoints/1000)*designsize*factor
+      end
+    else
+      return (- scaledpoints/1000)*10*factor
+    end
+  else
+    return scaledpoints
+  end
+end
+function constructors.getprivate(tfmdata)
+  local properties=tfmdata.properties
+  local private=properties.private
+  properties.private=private+1
+  return private
+end
+function constructors.cleanuptable(tfmdata)
+  if constructors.autocleanup and tfmdata.properties.virtualized then
+    for k,v in next,tfmdata.characters do
+      if v.commands then v.commands=nil end
+    end
+  end
+end
+function constructors.calculatescale(tfmdata,scaledpoints)
+  local parameters=tfmdata.parameters
+  if scaledpoints<0 then
+    scaledpoints=(- scaledpoints/1000)*(tfmdata.designsize or parameters.designsize) 
+  end
+  return scaledpoints,scaledpoints/(parameters.units or 1000) 
+end
+local unscaled={
+  ScriptPercentScaleDown=true,
+  ScriptScriptPercentScaleDown=true,
+  RadicalDegreeBottomRaisePercent=true,
+  NoLimitSupFactor=true,
+  NoLimitSubFactor=true,
+}
+function constructors.assignmathparameters(target,original)
+  local mathparameters=original.mathparameters
+  if mathparameters and next(mathparameters) then
+    local targetparameters=target.parameters
+    local targetproperties=target.properties
+    local targetmathparameters={}
+    local factor=targetproperties.math_is_scaled and 1 or targetparameters.factor
+    for name,value in next,mathparameters do
+      if unscaled[name] then
+        targetmathparameters[name]=value
+      else
+        targetmathparameters[name]=value*factor
+      end
+    end
+    if not targetmathparameters.FractionDelimiterSize then
+      targetmathparameters.FractionDelimiterSize=1.01*targetparameters.size
+    end
+    if not mathparameters.FractionDelimiterDisplayStyleSize then
+      targetmathparameters.FractionDelimiterDisplayStyleSize=2.40*targetparameters.size
+    end
+    target.mathparameters=targetmathparameters
+  end
+end
+function constructors.beforecopyingcharacters(target,original)
+end
+function constructors.aftercopyingcharacters(target,original)
+end
+constructors.sharefonts=false
+constructors.nofsharedfonts=0
+local sharednames={}
+function constructors.trytosharefont(target,tfmdata)
+  if constructors.sharefonts then 
+    local characters=target.characters
+    local n=1
+    local t={ target.psname }
+    local u=sortedkeys(characters)
+    for i=1,#u do
+      local k=u[i]
+      n=n+1;t[n]=k
+      n=n+1;t[n]=characters[k].index or k
+    end
+    local h=md5.HEX(concat(t," "))
+    local s=sharednames[h]
+    if s then
+      if trace_defining then
+        report_defining("font %a uses backend resources of font %a",target.fullname,s)
+      end
+      target.fullname=s
+      constructors.nofsharedfonts=constructors.nofsharedfonts+1
+      target.properties.sharedwith=s
+    else
+      sharednames[h]=target.fullname
+    end
+  end
+end
+function constructors.enhanceparameters(parameters)
+  local xheight=parameters.x_height
+  local quad=parameters.quad
+  local space=parameters.space
+  local stretch=parameters.space_stretch
+  local shrink=parameters.space_shrink
+  local extra=parameters.extra_space
+  local slant=parameters.slant
+  parameters.xheight=xheight
+  parameters.spacestretch=stretch
+  parameters.spaceshrink=shrink
+  parameters.extraspace=extra
+  parameters.em=quad
+  parameters.ex=xheight
+  parameters.slantperpoint=slant
+  parameters.spacing={
+    width=space,
+    stretch=stretch,
+    shrink=shrink,
+    extra=extra,
+  }
+end
+local function mathkerns(v,vdelta)
+  local k={}
+  for i=1,#v do
+    local entry=v[i]
+    local height=entry.height
+    local kern=entry.kern
+    k[i]={
+      height=height and vdelta*height or 0,
+      kern=kern  and vdelta*kern  or 0,
+    }
+  end
+  return k
+end
+local psfake=0
+local function fixedpsname(psname,fallback)
+  local usedname=psname
+  if psname and psname~="" then
+    if find(psname," ") then
+      usedname=gsub(psname,"[%s]+","-")
+    else
+    end
+  elseif not fallback or fallback=="" then
+    psfake=psfake+1
+    psname="fakename-"..psfake
+  else
+    psname=fallback
+    usedname=gsub(psname,"[^a-zA-Z0-9]+","-")
+  end
+  return usedname,psname~=usedname
+end
+function constructors.scale(tfmdata,specification)
+  local target={}
+  if tonumber(specification) then
+    specification={ size=specification }
+  end
+  target.specification=specification
+  local scaledpoints=specification.size
+  local relativeid=specification.relativeid
+  local properties=tfmdata.properties   or {}
+  local goodies=tfmdata.goodies    or {}
+  local resources=tfmdata.resources   or {}
+  local descriptions=tfmdata.descriptions  or {} 
+  local characters=tfmdata.characters   or {} 
+  local changed=tfmdata.changed    or {} 
+  local shared=tfmdata.shared     or {}
+  local parameters=tfmdata.parameters   or {}
+  local mathparameters=tfmdata.mathparameters or {}
+  local targetcharacters={}
+  local targetdescriptions=derivetable(descriptions)
+  local targetparameters=derivetable(parameters)
+  local targetproperties=derivetable(properties)
+  local targetgoodies=goodies            
+  target.characters=targetcharacters
+  target.descriptions=targetdescriptions
+  target.parameters=targetparameters
+  target.properties=targetproperties
+  target.goodies=targetgoodies
+  target.shared=shared
+  target.resources=resources
+  target.unscaled=tfmdata
+  local mathsize=tonumber(specification.mathsize) or 0
+  local textsize=tonumber(specification.textsize) or scaledpoints
+  local forcedsize=tonumber(parameters.mathsize  ) or 0 
+  local extrafactor=tonumber(specification.factor ) or 1
+  if (mathsize==2 or forcedsize==2) and parameters.scriptpercentage then
+    scaledpoints=parameters.scriptpercentage*textsize/100
+  elseif (mathsize==3 or forcedsize==3) and parameters.scriptscriptpercentage then
+    scaledpoints=parameters.scriptscriptpercentage*textsize/100
+  elseif forcedsize>1000 then 
+    scaledpoints=forcedsize
+  else
+  end
+  targetparameters.mathsize=mathsize  
+  targetparameters.textsize=textsize  
+  targetparameters.forcedsize=forcedsize 
+  targetparameters.extrafactor=extrafactor
+  local tounicode=fonts.mappings.tounicode
+  local defaultwidth=resources.defaultwidth or 0
+  local defaultheight=resources.defaultheight or 0
+  local defaultdepth=resources.defaultdepth or 0
+  local units=parameters.units or 1000
+  targetproperties.language=properties.language or "dflt" 
+  targetproperties.script=properties.script  or "dflt" 
+  targetproperties.mode=properties.mode   or "base"
+  local askedscaledpoints=scaledpoints
+  local scaledpoints,delta=constructors.calculatescale(tfmdata,scaledpoints,nil,specification)
+  local hdelta=delta
+  local vdelta=delta
+  target.designsize=parameters.designsize 
+  target.units=units
+  target.units_per_em=units
+  local direction=properties.direction or tfmdata.direction or 0 
+  target.direction=direction
+  properties.direction=direction
+  target.size=scaledpoints
+  target.encodingbytes=properties.encodingbytes or 1
+  target.embedding=properties.embedding or "subset"
+  target.tounicode=1
+  target.cidinfo=properties.cidinfo
+  target.format=properties.format
+  target.cache=constructors.cacheintex and "yes" or "renew"
+  local fontname=properties.fontname or tfmdata.fontname
+  local fullname=properties.fullname or tfmdata.fullname
+  local filename=properties.filename or tfmdata.filename
+  local psname=properties.psname  or tfmdata.psname
+  local name=properties.name   or tfmdata.name
+  local psname,psfixed=fixedpsname(psname,fontname or fullname or file.nameonly(filename))
+  target.fontname=fontname
+  target.fullname=fullname
+  target.filename=filename
+  target.psname=psname
+  target.name=name
+  properties.fontname=fontname
+  properties.fullname=fullname
+  properties.filename=filename
+  properties.psname=psname
+  properties.name=name
+  local expansion=parameters.expansion
+  if expansion then
+    target.stretch=expansion.stretch
+    target.shrink=expansion.shrink
+    target.step=expansion.step
+  end
+  local extendfactor=parameters.extendfactor or 0
+  if extendfactor~=0 and extendfactor~=1 then
+    hdelta=hdelta*extendfactor
+    target.extend=extendfactor*1000 
+  else
+    target.extend=1000 
+  end
+  local slantfactor=parameters.slantfactor or 0
+  if slantfactor~=0 then
+    target.slant=slantfactor*1000
+  else
+    target.slant=0
+  end
+  targetparameters.factor=delta
+  targetparameters.hfactor=hdelta
+  targetparameters.vfactor=vdelta
+  targetparameters.size=scaledpoints
+  targetparameters.units=units
+  targetparameters.scaledpoints=askedscaledpoints
+  local isvirtual=properties.virtualized or tfmdata.type=="virtual"
+  local hasquality=parameters.expansion or parameters.protrusion
+  local hasitalics=properties.hasitalics
+  local autoitalicamount=properties.autoitalicamount
+  local stackmath=not properties.nostackmath
+  local nonames=properties.noglyphnames
+  local haskerns=properties.haskerns   or properties.mode=="base" 
+  local hasligatures=properties.hasligatures or properties.mode=="base" 
+  local realdimensions=properties.realdimensions
+  local writingmode=properties.writingmode or "horizontal"
+  local identity=properties.identity or "horizontal"
+  local vfonts=target.fonts
+  if vfonts and #vfonts>0 then
+    target.fonts=fastcopy(vfonts) 
+  elseif isvirtual then
+    target.fonts={ { id=0 } } 
+  end
+  if changed and not next(changed) then
+    changed=false
+  end
+  target.type=isvirtual and "virtual" or "real"
+  target.writingmode=writingmode=="vertical" and "vertical" or "horizontal"
+  target.identity=identity=="vertical" and "vertical" or "horizontal"
+  target.postprocessors=tfmdata.postprocessors
+  local targetslant=(parameters.slant     or parameters[1] or 0)*factors.pt 
+  local targetspace=(parameters.space     or parameters[2] or 0)*hdelta
+  local targetspace_stretch=(parameters.space_stretch or parameters[3] or 0)*hdelta
+  local targetspace_shrink=(parameters.space_shrink or parameters[4] or 0)*hdelta
+  local targetx_height=(parameters.x_height   or parameters[5] or 0)*vdelta
+  local targetquad=(parameters.quad     or parameters[6] or 0)*hdelta
+  local targetextra_space=(parameters.extra_space  or parameters[7] or 0)*hdelta
+  targetparameters.slant=targetslant 
+  targetparameters.space=targetspace
+  targetparameters.space_stretch=targetspace_stretch
+  targetparameters.space_shrink=targetspace_shrink
+  targetparameters.x_height=targetx_height
+  targetparameters.quad=targetquad
+  targetparameters.extra_space=targetextra_space
+  local ascender=parameters.ascender
+  if ascender then
+    targetparameters.ascender=delta*ascender
+  end
+  local descender=parameters.descender
+  if descender then
+    targetparameters.descender=delta*descender
+  end
+  constructors.enhanceparameters(targetparameters)
+  local protrusionfactor=(targetquad~=0 and 1000/targetquad) or 0
+  local scaledwidth=defaultwidth*hdelta
+  local scaledheight=defaultheight*vdelta
+  local scaleddepth=defaultdepth*vdelta
+  local hasmath=(properties.hasmath or next(mathparameters)) and true
+  if hasmath then
+    constructors.assignmathparameters(target,tfmdata) 
+    properties.hasmath=true
+    target.nomath=false
+    target.MathConstants=target.mathparameters
+  else
+    properties.hasmath=false
+    target.nomath=true
+    target.mathparameters=nil 
+  end
+  if hasmath then
+    local mathitalics=properties.mathitalics
+    if mathitalics==false then
+      if trace_defining then
+        report_defining("%s italics %s for font %a, fullname %a, filename %a","math",hasitalics and "ignored" or "disabled",name,fullname,filename)
+      end
+      hasitalics=false
+      autoitalicamount=false
+    end
+  else
+    local textitalics=properties.textitalics
+    if textitalics==false then
+      if trace_defining then
+        report_defining("%s italics %s for font %a, fullname %a, filename %a","text",hasitalics and "ignored" or "disabled",name,fullname,filename)
+      end
+      hasitalics=false
+      autoitalicamount=false
+    end
+  end
+  if trace_defining then
+    report_defining("defining tfm, name %a, fullname %a, filename %a, %spsname %a, hscale %a, vscale %a, math %a, italics %a",
+      name,fullname,filename,psfixed and "(fixed) " or "",psname,hdelta,vdelta,
+      hasmath and "enabled" or "disabled",hasitalics and "enabled" or "disabled")
+  end
+  constructors.beforecopyingcharacters(target,tfmdata)
+  local sharedkerns={}
+  for unicode,character in next,characters do
+    local chr,description,index
+    if changed then
+      local c=changed[unicode]
+      if c and c~=unicode then
+        if c then
+          description=descriptions[c] or descriptions[unicode] or character
+          character=characters[c] or character
+          index=description.index or c
+        else
+          description=descriptions[unicode] or character
+          index=description.index or unicode
+        end
+      else
+        description=descriptions[unicode] or character
+        index=description.index or unicode
+      end
+    else
+      description=descriptions[unicode] or character
+      index=description.index or unicode
+    end
+    local width=description.width
+    local height=description.height
+    local depth=description.depth
+    if realdimensions then
+      if not height or height==0 then
+        local bb=description.boundingbox
+        local ht=bb[4]
+        if ht~=0 then
+          height=ht
+        end
+        if not depth or depth==0 then
+          local dp=-bb[2]
+          if dp~=0 then
+            depth=dp
+          end
+        end
+      elseif not depth or depth==0 then
+        local dp=-description.boundingbox[2]
+        if dp~=0 then
+          depth=dp
+        end
+      end
+    end
+    if width then width=hdelta*width else width=scaledwidth end
+    if height then height=vdelta*height else height=scaledheight end
+    if depth and depth~=0 then
+      depth=delta*depth
+      if nonames then
+        chr={
+          index=index,
+          height=height,
+          depth=depth,
+          width=width,
+        }
+      else
+        chr={
+          name=description.name,
+          index=index,
+          height=height,
+          depth=depth,
+          width=width,
+        }
+      end
+    else
+      if nonames then
+        chr={
+          index=index,
+          height=height,
+          width=width,
+        }
+      else
+        chr={
+          name=description.name,
+          index=index,
+          height=height,
+          width=width,
+        }
+      end
+    end
+    local isunicode=description.unicode
+    if isunicode then
+      chr.unicode=isunicode
+      chr.tounicode=tounicode(isunicode)
+    end
+    if hasquality then
+      local ve=character.expansion_factor
+      if ve then
+        chr.expansion_factor=ve*1000 
+      end
+      local vl=character.left_protruding
+      if vl then
+        chr.left_protruding=protrusionfactor*width*vl
+      end
+      local vr=character.right_protruding
+      if vr then
+        chr.right_protruding=protrusionfactor*width*vr
+      end
+    end
+    if hasmath then
+      local vn=character.next
+      if vn then
+        chr.next=vn
+      else
+        local vv=character.vert_variants
+        if vv then
+          local t={}
+          for i=1,#vv do
+            local vvi=vv[i]
+            t[i]={
+              ["start"]=(vvi["start"]  or 0)*vdelta,
+              ["end"]=(vvi["end"]   or 0)*vdelta,
+              ["advance"]=(vvi["advance"] or 0)*vdelta,
+              ["extender"]=vvi["extender"],
+              ["glyph"]=vvi["glyph"],
+            }
+          end
+          chr.vert_variants=t
+        else
+          local hv=character.horiz_variants
+          if hv then
+            local t={}
+            for i=1,#hv do
+              local hvi=hv[i]
+              t[i]={
+                ["start"]=(hvi["start"]  or 0)*hdelta,
+                ["end"]=(hvi["end"]   or 0)*hdelta,
+                ["advance"]=(hvi["advance"] or 0)*hdelta,
+                ["extender"]=hvi["extender"],
+                ["glyph"]=hvi["glyph"],
+              }
+            end
+            chr.horiz_variants=t
+          end
+        end
+      end
+      local vi=character.vert_italic
+      if vi and vi~=0 then
+        chr.vert_italic=vi*hdelta
+      end
+      local va=character.accent
+      if va then
+        chr.top_accent=vdelta*va
+      end
+      if stackmath then
+        local mk=character.mathkerns
+        if mk then
+          local tr,tl,br,bl=mk.topright,mk.topleft,mk.bottomright,mk.bottomleft
+          chr.mathkern={ 
+            top_right=tr and mathkerns(tr,vdelta) or nil,
+            top_left=tl and mathkerns(tl,vdelta) or nil,
+            bottom_right=br and mathkerns(br,vdelta) or nil,
+            bottom_left=bl and mathkerns(bl,vdelta) or nil,
+          }
+        end
+      end
+      if hasitalics then
+        local vi=character.italic
+        if vi and vi~=0 then
+          chr.italic=vi*hdelta
+        end
+      end
+    elseif autoitalicamount then 
+      local vi=description.italic
+      if not vi then
+        local bb=description.boundingbox
+        if bb then
+          local vi=bb[3]-description.width+autoitalicamount
+          if vi>0 then 
+            chr.italic=vi*hdelta
+          end
+        else
+        end
+      elseif vi~=0 then
+        chr.italic=vi*hdelta
+      end
+    elseif hasitalics then 
+      local vi=character.italic
+      if vi and vi~=0 then
+        chr.italic=vi*hdelta
+      end
+    end
+    if haskerns then
+      local vk=character.kerns
+      if vk then
+        local s=sharedkerns[vk]
+        if not s then
+          s={}
+          for k,v in next,vk do s[k]=v*hdelta end
+          sharedkerns[vk]=s
+        end
+        chr.kerns=s
+      end
+    end
+    if hasligatures then
+      local vl=character.ligatures
+      if vl then
+        if true then
+          chr.ligatures=vl 
+        else
+          local tt={}
+          for i,l in next,vl do
+            tt[i]=l
+          end
+          chr.ligatures=tt
+        end
+      end
+    end
+    if isvirtual then
+      local vc=character.commands
+      if vc then
+        local ok=false
+        for i=1,#vc do
+          local key=vc[i][1]
+          if key=="right" or key=="down" then
+            ok=true
+            break
+          end
+        end
+        if ok then
+          local tt={}
+          for i=1,#vc do
+            local ivc=vc[i]
+            local key=ivc[1]
+            if key=="right" then
+              tt[i]={ key,ivc[2]*hdelta }
+            elseif key=="down" then
+              tt[i]={ key,ivc[2]*vdelta }
+            elseif key=="rule" then
+              tt[i]={ key,ivc[2]*vdelta,ivc[3]*hdelta }
+            else 
+              tt[i]=ivc 
+            end
+          end
+          chr.commands=tt
+        else
+          chr.commands=vc
+        end
+        chr.index=nil
+      end
+    end
+    targetcharacters[unicode]=chr
+  end
+  properties.setitalics=hasitalics
+  constructors.aftercopyingcharacters(target,tfmdata)
+  constructors.trytosharefont(target,tfmdata)
+  local vfonts=target.fonts
+  if isvirtual then
+    if not vfonts or #vfonts==0 then
+      target.fonts={ { id=0 } }
+    end
+  elseif vfonts then
+    properties.virtualized=true
+    target.type="virtual"
+    if #vfonts==0 then
+      target.fonts={ { id=0 } }
+    end
+  end
+  return target
+end
+function constructors.finalize(tfmdata)
+  if tfmdata.properties and tfmdata.properties.finalized then
+    return
+  end
+  if not tfmdata.characters then
+    return nil
+  end
+  if not tfmdata.goodies then
+    tfmdata.goodies={} 
+  end
+  local parameters=tfmdata.parameters
+  if not parameters then
+    return nil
+  end
+  if not parameters.expansion then
+    parameters.expansion={
+      stretch=tfmdata.stretch or 0,
+      shrink=tfmdata.shrink or 0,
+      step=tfmdata.step  or 0,
+    }
+  end
+  if not parameters.size then
+    parameters.size=tfmdata.size
+  end
+  if not parameters.extendfactor then
+    parameters.extendfactor=tfmdata.extend or 0
+  end
+  if not parameters.slantfactor then
+    parameters.slantfactor=tfmdata.slant or 0
+  end
+  local designsize=parameters.designsize
+  if designsize then
+    parameters.minsize=tfmdata.minsize or designsize
+    parameters.maxsize=tfmdata.maxsize or designsize
+  else
+    designsize=factors.pt*10
+    parameters.designsize=designsize
+    parameters.minsize=designsize
+    parameters.maxsize=designsize
+  end
+  parameters.minsize=tfmdata.minsize or parameters.designsize
+  parameters.maxsize=tfmdata.maxsize or parameters.designsize
+  if not parameters.units then
+    parameters.units=tfmdata.units or tfmdata.units_per_em or 1000
+  end
+  if not tfmdata.descriptions then
+    local descriptions={} 
+    setmetatableindex(descriptions,function(t,k) local v={} t[k]=v return v end)
+    tfmdata.descriptions=descriptions
+  end
+  local properties=tfmdata.properties
+  if not properties then
+    properties={}
+    tfmdata.properties=properties
+  end
+  if not properties.virtualized then
+    properties.virtualized=tfmdata.type=="virtual"
+  end
+  if not tfmdata.properties then
+    tfmdata.properties={
+      fontname=tfmdata.fontname,
+      filename=tfmdata.filename,
+      fullname=tfmdata.fullname,
+      name=tfmdata.name,
+      psname=tfmdata.psname,
+      encodingbytes=tfmdata.encodingbytes or 1,
+      embedding=tfmdata.embedding   or "subset",
+      tounicode=tfmdata.tounicode   or 1,
+      cidinfo=tfmdata.cidinfo    or nil,
+      format=tfmdata.format    or "type1",
+      direction=tfmdata.direction   or 0,
+      writingmode=tfmdata.writingmode  or "horizontal",
+      identity=tfmdata.identity   or "horizontal",
+    }
+  end
+  if not tfmdata.resources then
+    tfmdata.resources={}
+  end
+  if not tfmdata.shared then
+    tfmdata.shared={}
+  end
+  if not properties.hasmath then
+    properties.hasmath=not tfmdata.nomath
+  end
+  tfmdata.MathConstants=nil
+  tfmdata.postprocessors=nil
+  tfmdata.fontname=nil
+  tfmdata.filename=nil
+  tfmdata.fullname=nil
+  tfmdata.name=nil 
+  tfmdata.psname=nil
+  tfmdata.encodingbytes=nil
+  tfmdata.embedding=nil
+  tfmdata.tounicode=nil
+  tfmdata.cidinfo=nil
+  tfmdata.format=nil
+  tfmdata.direction=nil
+  tfmdata.type=nil
+  tfmdata.nomath=nil
+  tfmdata.designsize=nil
+  tfmdata.size=nil
+  tfmdata.stretch=nil
+  tfmdata.shrink=nil
+  tfmdata.step=nil
+  tfmdata.extend=nil
+  tfmdata.slant=nil
+  tfmdata.units=nil
+  tfmdata.units_per_em=nil
+  tfmdata.cache=nil
+  properties.finalized=true
+  return tfmdata
+end
+local hashmethods={}
+constructors.hashmethods=hashmethods
+function constructors.hashfeatures(specification) 
+  local features=specification.features
+  if features then
+    local t,n={},0
+    for category,list in sortedhash(features) do
+      if next(list) then
+        local hasher=hashmethods[category]
+        if hasher then
+          local hash=hasher(list)
+          if hash then
+            n=n+1
+            t[n]=category..":"..hash
+          end
+        end
+      end
+    end
+    if n>0 then
+      return concat(t," & ")
+    end
+  end
+  return "unknown"
+end
+hashmethods.normal=function(list)
+  local s={}
+  local n=0
+  for k,v in next,list do
+    if not k then
+    elseif k=="number" or k=="features" then
+    else
+      n=n+1
+      s[n]=k..'='..tostring(v)
+    end
+  end
+  if n>0 then
+    sort(s)
+    return concat(s,"+")
+  end
+end
+function constructors.hashinstance(specification,force)
+  local hash,size,fallbacks=specification.hash,specification.size,specification.fallbacks
+  if force or not hash then
+    hash=constructors.hashfeatures(specification)
+    specification.hash=hash
+  end
+  if size<1000 and designsizes[hash] then
+    size=math.round(constructors.scaled(size,designsizes[hash]))
+    specification.size=size
+  end
+  if fallbacks then
+    return hash..' @ '..tostring(size)..' @ '..fallbacks
+  else
+    return hash..' @ '..tostring(size)
+  end
+end
+function constructors.setname(tfmdata,specification) 
+  if constructors.namemode=="specification" then
+    local specname=specification.specification
+    if specname then
+      tfmdata.properties.name=specname
+      if trace_defining then
+        report_otf("overloaded fontname %a",specname)
+      end
+    end
+  end
+end
+function constructors.checkedfilename(data)
+  local foundfilename=data.foundfilename
+  if not foundfilename then
+    local askedfilename=data.filename or ""
+    if askedfilename~="" then
+      askedfilename=resolvers.resolve(askedfilename) 
+      foundfilename=resolvers.findbinfile(askedfilename,"") or ""
+      if foundfilename=="" then
+        report_defining("source file %a is not found",askedfilename)
+        foundfilename=resolvers.findbinfile(file.basename(askedfilename),"") or ""
+        if foundfilename~="" then
+          report_defining("using source file %a due to cache mismatch",foundfilename)
+        end
+      end
+    end
+    data.foundfilename=foundfilename
+  end
+  return foundfilename
+end
+local formats=allocate()
+fonts.formats=formats
+setmetatableindex(formats,function(t,k)
+  local l=lower(k)
+  if rawget(t,k) then
+    t[k]=l
+    return l
+  end
+  return rawget(t,file.suffix(l))
+end)
+do
+  local function setindeed(mode,source,target,group,name,position)
+    local action=source[mode]
+    if not action then
+      return
+    end
+    local t=target[mode]
+    if not t then
+      report_defining("fatal error in setting feature %a, group %a, mode %a",name,group,mode)
+      os.exit()
+    elseif position then
+      insert(t,position,{ name=name,action=action })
+    else
+      for i=1,#t do
+        local ti=t[i]
+        if ti.name==name then
+          ti.action=action
+          return
+        end
+      end
+      insert(t,{ name=name,action=action })
+    end
+  end
+  local function set(group,name,target,source)
+    target=target[group]
+    if not target then
+      report_defining("fatal target error in setting feature %a, group %a",name,group)
+      os.exit()
+    end
+    local source=source[group]
+    if not source then
+      report_defining("fatal source error in setting feature %a, group %a",name,group)
+      os.exit()
+    end
+    local position=source.position
+    setindeed("node",source,target,group,name,position)
+    setindeed("base",source,target,group,name,position)
+    setindeed("plug",source,target,group,name,position)
+  end
+  local function register(where,specification)
+    local name=specification.name
+    if name and name~="" then
+      local default=specification.default
+      local description=specification.description
+      local initializers=specification.initializers
+      local processors=specification.processors
+      local manipulators=specification.manipulators
+      local modechecker=specification.modechecker
+      if default then
+        where.defaults[name]=default
+      end
+      if description and description~="" then
+        where.descriptions[name]=description
+      end
+      if initializers then
+        set('initializers',name,where,specification)
+      end
+      if processors then
+        set('processors',name,where,specification)
+      end
+      if manipulators then
+        set('manipulators',name,where,specification)
+      end
+      if modechecker then
+        where.modechecker=modechecker
+      end
+    end
+  end
+  constructors.registerfeature=register
+  function constructors.getfeatureaction(what,where,mode,name)
+    what=handlers[what].features
+    if what then
+      where=what[where]
+      if where then
+        mode=where[mode]
+        if mode then
+          for i=1,#mode do
+            local m=mode[i]
+            if m.name==name then
+              return m.action
+            end
+          end
+        end
+      end
+    end
+  end
+  local newfeatures={}
+  constructors.newfeatures=newfeatures 
+  constructors.features=newfeatures
+  local function setnewfeatures(what)
+    local handler=handlers[what]
+    local features=handler.features
+    if not features then
+      local tables=handler.tables   
+      local statistics=handler.statistics 
+      features=allocate {
+        defaults={},
+        descriptions=tables and tables.features or {},
+        used=statistics and statistics.usedfeatures or {},
+        initializers={ base={},node={},plug={} },
+        processors={ base={},node={},plug={} },
+        manipulators={ base={},node={},plug={} },
+      }
+      features.register=function(specification) return register(features,specification) end
+      handler.features=features 
+    end
+    return features
+  end
+  setmetatable(newfeatures,{
+    __call=function(t,k) local v=t[k] return v end,
+    __index=function(t,k) local v=setnewfeatures(k) t[k]=v return v end,
+  })
+end
+do
+  local newhandler={}
+  constructors.handlers=newhandler 
+  constructors.newhandler=newhandler
+  local function setnewhandler(what) 
+    local handler=handlers[what]
+    if not handler then
+      handler={}
+      handlers[what]=handler
+    end
+    return handler
+  end
+  setmetatable(newhandler,{
+    __call=function(t,k) local v=t[k] return v end,
+    __index=function(t,k) local v=setnewhandler(k) t[k]=v return v end,
+  })
+end
+do
+  local newenhancer={}
+  constructors.enhancers=newenhancer
+  constructors.newenhancer=newenhancer
+  local function setnewenhancer(format)
+    local handler=handlers[format]
+    local enhancers=handler.enhancers
+    if not enhancers then
+      local actions=allocate() 
+      local before=allocate()
+      local after=allocate()
+      local order=allocate()
+      local known={}
+      local nofsteps=0
+      local patches={ before=before,after=after }
+      local trace=false
+      local report=logs.reporter("fonts",format.." enhancing")
+      trackers.register(format..".loading",function(v) trace=v end)
+      local function enhance(name,data,filename,raw)
+        local enhancer=actions[name]
+        if enhancer then
+          if trace then
+            report("apply enhancement %a to file %a",name,filename)
+            ioflush()
+          end
+          enhancer(data,filename,raw)
+        else
+        end
+      end
+      local function apply(data,filename,raw)
+        local basename=file.basename(lower(filename))
+        if trace then
+          report("%s enhancing file %a","start",filename)
+        end
+        ioflush() 
+        for e=1,nofsteps do
+          local enhancer=order[e]
+          local b=before[enhancer]
+          if b then
+            for pattern,action in next,b do
+              if find(basename,pattern) then
+                action(data,filename,raw)
+              end
+            end
+          end
+          enhance(enhancer,data,filename,raw) 
+          local a=after[enhancer]
+          if a then
+            for pattern,action in next,a do
+              if find(basename,pattern) then
+                action(data,filename,raw)
+              end
+            end
+          end
+          ioflush() 
+        end
+        if trace then
+          report("%s enhancing file %a","stop",filename)
+        end
+        ioflush() 
+      end
+      local function register(what,action)
+        if action then
+          if actions[what] then
+          else
+            nofsteps=nofsteps+1
+            order[nofsteps]=what
+            known[what]=nofsteps
+          end
+          actions[what]=action
+        else
+          report("bad enhancer %a",what)
+        end
+      end
+      local function patch(what,where,pattern,action)
+        local pw=patches[what]
+        if pw then
+          local ww=pw[where]
+          if ww then
+            ww[pattern]=action
+          else
+            pw[where]={ [pattern]=action }
+            if not known[where] then
+              nofsteps=nofsteps+1
+              order[nofsteps]=where
+              known[where]=nofsteps
+            end
+          end
+        end
+      end
+      enhancers={
+        register=register,
+        apply=apply,
+        patch=patch,
+        report=report,
+        patches={
+          register=patch,
+          report=report,
+        },
+      }
+      handler.enhancers=enhancers
+    end
+    return enhancers
+  end
+  setmetatable(newenhancer,{
+    __call=function(t,k) local v=t[k] return v end,
+    __index=function(t,k) local v=setnewenhancer(k) t[k]=v return v end,
+  })
+end
+function constructors.checkedfeatures(what,features)
+  local defaults=handlers[what].features.defaults
+  if features and next(features) then
+    features=fastcopy(features) 
+    for key,value in next,defaults do
+      if features[key]==nil then
+        features[key]=value
+      end
+    end
+    return features
+  else
+    return fastcopy(defaults) 
+  end
+end
+function constructors.initializefeatures(what,tfmdata,features,trace,report)
+  if features and next(features) then
+    local properties=tfmdata.properties or {} 
+    local whathandler=handlers[what]
+    local whatfeatures=whathandler.features
+    local whatmodechecker=whatfeatures.modechecker
+    local mode=properties.mode or (whatmodechecker and whatmodechecker(tfmdata,features,features.mode)) or features.mode or "base"
+    properties.mode=mode 
+    features.mode=mode
+    local done={}
+    while true do
+      local redo=false
+      local initializers=whatfeatures.initializers[mode]
+      if initializers then
+        for i=1,#initializers do
+          local step=initializers[i]
+          local feature=step.name
+          local value=features[feature]
+          if not value then
+          elseif done[feature] then
+          else
+            local action=step.action
+            if trace then
+              report("initializing feature %a to %a for mode %a for font %a",feature,
+                value,mode,tfmdata.properties.fullname)
+            end
+            action(tfmdata,value,features) 
+            if mode~=properties.mode or mode~=features.mode then
+              if whatmodechecker then
+                properties.mode=whatmodechecker(tfmdata,features,properties.mode) 
+                features.mode=properties.mode
+              end
+              if mode~=properties.mode then
+                mode=properties.mode
+                redo=true
+              end
+            end
+            done[feature]=true
+          end
+          if redo then
+            break
+          end
+        end
+        if not redo then
+          break
+        end
+      else
+        break
+      end
+    end
+    properties.mode=mode 
+    return true
+  else
+    return false
+  end
+end
+function constructors.collectprocessors(what,tfmdata,features,trace,report)
+  local processes,nofprocesses={},0
+  if features and next(features) then
+    local properties=tfmdata.properties
+    local whathandler=handlers[what]
+    local whatfeatures=whathandler.features
+    local whatprocessors=whatfeatures.processors
+    local mode=properties.mode
+    local processors=whatprocessors[mode]
+    if processors then
+      for i=1,#processors do
+        local step=processors[i]
+        local feature=step.name
+        if features[feature] then
+          local action=step.action
+          if trace then
+            report("installing feature processor %a for mode %a for font %a",feature,mode,tfmdata.properties.fullname)
+          end
+          if action then
+            nofprocesses=nofprocesses+1
+            processes[nofprocesses]=action
+          end
+        end
+      end
+    elseif trace then
+      report("no feature processors for mode %a for font %a",mode,properties.fullname)
+    end
+  end
+  return processes
+end
+function constructors.applymanipulators(what,tfmdata,features,trace,report)
+  if features and next(features) then
+    local properties=tfmdata.properties
+    local whathandler=handlers[what]
+    local whatfeatures=whathandler.features
+    local whatmanipulators=whatfeatures.manipulators
+    local mode=properties.mode
+    local manipulators=whatmanipulators[mode]
+    if manipulators then
+      for i=1,#manipulators do
+        local step=manipulators[i]
+        local feature=step.name
+        local value=features[feature]
+        if value then
+          local action=step.action
+          if trace then
+            report("applying feature manipulator %a for mode %a for font %a",feature,mode,properties.fullname)
+          end
+          if action then
+            action(tfmdata,feature,value)
+          end
+        end
+      end
+    end
+  end
+end
+function constructors.addcoreunicodes(unicodes) 
+  if not unicodes then
+    unicodes={}
+  end
+  unicodes.space=0x0020
+  unicodes.hyphen=0x002D
+  unicodes.zwj=0x200D
+  unicodes.zwnj=0x200C
+  return unicodes
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['luatex-font-enc']={
+  version=1.001,
+  comment="companion to luatex-*.tex",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+if context then
+  texio.write_nl("fatal error: this module is not for context")
+  os.exit()
+end
+local fonts=fonts
+local encodings={}
+fonts.encodings=encodings
+encodings.agl={}
+encodings.known={}
+setmetatable(encodings.agl,{ __index=function(t,k)
+  if k=="unicodes" then
+    texio.write(" <loading (extended) adobe glyph list>")
+    local unicodes=dofile(resolvers.findfile("font-age.lua"))
+    encodings.agl={ unicodes=unicodes }
+    return unicodes
+  else
+    return nil
+  end
+end })
+encodings.cache=containers.define("fonts","enc",encodings.version,true)
+function encodings.load(filename)
+  local name=file.removesuffix(filename)
+  local data=containers.read(encodings.cache,name)
+  if data then
+    return data
+  end
+  local vector,tag,hash,unicodes={},"",{},{}
+  local foundname=resolvers.findfile(filename,'enc')
+  if foundname and foundname~="" then
+    local ok,encoding,size=resolvers.loadbinfile(foundname)
+    if ok and encoding then
+      encoding=string.gsub(encoding,"%%(.-)\n","")
+      local unicoding=encodings.agl.unicodes
+      local tag,vec=string.match(encoding,"/(%w+)%s*%[(.*)%]%s*def")
+      local i=0
+      for ch in string.gmatch(vec,"/([%a%d%.]+)") do
+        if ch~=".notdef" then
+          vector[i]=ch
+          if not hash[ch] then
+            hash[ch]=i
+          else
+          end
+          local u=unicoding[ch]
+          if u then
+            unicodes[u]=i
+          end
+        end
+        i=i+1
+      end
+    end
+  end
+  local data={
+    name=name,
+    tag=tag,
+    vector=vector,
+    hash=hash,
+    unicodes=unicodes
+  }
+  return containers.write(encodings.cache,name,data)
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-cid']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local format,match,lower=string.format,string.match,string.lower
+local tonumber=tonumber
+local P,S,R,C,V,lpegmatch=lpeg.P,lpeg.S,lpeg.R,lpeg.C,lpeg.V,lpeg.match
+local fonts,logs,trackers=fonts,logs,trackers
+local trace_loading=false trackers.register("otf.loading",function(v) trace_loading=v end)
+local report_otf=logs.reporter("fonts","otf loading")
+local cid={}
+fonts.cid=cid
+local cidmap={}
+local cidmax=10
+local number=C(R("09","af","AF")^1)
+local space=S(" \n\r\t")
+local spaces=space^0
+local period=P(".")
+local periods=period*period
+local name=P("/")*C((1-space)^1)
+local unicodes,names={},{} 
+local function do_one(a,b)
+  unicodes[tonumber(a)]=tonumber(b,16)
+end
+local function do_range(a,b,c)
+  c=tonumber(c,16)
+  for i=tonumber(a),tonumber(b) do
+    unicodes[i]=c
+    c=c+1
+  end
+end
+local function do_name(a,b)
+  names[tonumber(a)]=b
+end
+local grammar=P { "start",
+  start=number*spaces*number*V("series"),
+  series=(spaces*(V("one")+V("range")+V("named")))^1,
+  one=(number*spaces*number)/do_one,
+  range=(number*periods*number*spaces*number)/do_range,
+  named=(number*spaces*name)/do_name
+}
+local function loadcidfile(filename)
+  local data=io.loaddata(filename)
+  if data then
+    unicodes,names={},{}
+    lpegmatch(grammar,data)
+    local supplement,registry,ordering=match(filename,"^(.-)%-(.-)%-()%.(.-)$")
+    return {
+      supplement=supplement,
+      registry=registry,
+      ordering=ordering,
+      filename=filename,
+      unicodes=unicodes,
+      names=names,
+    }
+  end
+end
+cid.loadfile=loadcidfile 
+local template="%s-%s-%s.cidmap"
+local function locate(registry,ordering,supplement)
+  local filename=format(template,registry,ordering,supplement)
+  local hashname=lower(filename)
+  local found=cidmap[hashname]
+  if not found then
+    if trace_loading then
+      report_otf("checking cidmap, registry %a, ordering %a, supplement %a, filename %a",registry,ordering,supplement,filename)
+    end
+    local fullname=resolvers.findfile(filename,'cid') or ""
+    if fullname~="" then
+      found=loadcidfile(fullname)
+      if found then
+        if trace_loading then
+          report_otf("using cidmap file %a",filename)
+        end
+        cidmap[hashname]=found
+        found.usedname=file.basename(filename)
+      end
+    end
+  end
+  return found
+end
+function cid.getmap(specification)
+  if not specification then
+    report_otf("invalid cidinfo specification, table expected")
+    return
+  end
+  local registry=specification.registry
+  local ordering=specification.ordering
+  local supplement=specification.supplement
+  local filename=format(registry,ordering,supplement)
+  local lowername=lower(filename)
+  local found=cidmap[lowername]
+  if found then
+    return found
+  end
+  if ordering=="Identity" then
+    local found={
+      supplement=supplement,
+      registry=registry,
+      ordering=ordering,
+      filename=filename,
+      unicodes={},
+      names={},
+    }
+    cidmap[lowername]=found
+    return found
+  end
+  if trace_loading then
+    report_otf("cidmap needed, registry %a, ordering %a, supplement %a",registry,ordering,supplement)
+  end
+  found=locate(registry,ordering,supplement)
+  if not found then
+    local supnum=tonumber(supplement)
+    local cidnum=nil
+    if supnum<cidmax then
+      for s=supnum+1,cidmax do
+        local c=locate(registry,ordering,s)
+        if c then
+          found,cidnum=c,s
+          break
+        end
+      end
+    end
+    if not found and supnum>0 then
+      for s=supnum-1,0,-1 do
+        local c=locate(registry,ordering,s)
+        if c then
+          found,cidnum=c,s
+          break
+        end
+      end
+    end
+    registry=lower(registry)
+    ordering=lower(ordering)
+    if found and cidnum>0 then
+      for s=0,cidnum-1 do
+        local filename=format(template,registry,ordering,s)
+        if not cidmap[filename] then
+          cidmap[filename]=found
+        end
+      end
+    end
+  end
+  return found
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-map']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local tonumber,next,type=tonumber,next,type
+local match,format,find,concat,gsub,lower=string.match,string.format,string.find,table.concat,string.gsub,string.lower
+local P,R,S,C,Ct,Cc,lpegmatch=lpeg.P,lpeg.R,lpeg.S,lpeg.C,lpeg.Ct,lpeg.Cc,lpeg.match
+local floor=math.floor
+local formatters=string.formatters
+local sortedhash,sortedkeys=table.sortedhash,table.sortedkeys
+local trace_loading=false trackers.register("fonts.loading",function(v) trace_loading=v end)
+local trace_mapping=false trackers.register("fonts.mapping",function(v) trace_mapping=v end)
+local report_fonts=logs.reporter("fonts","loading")
+local force_ligatures=false directives.register("fonts.mapping.forceligatures",function(v) force_ligatures=v end)
+local fonts=fonts or {}
+local mappings=fonts.mappings or {}
+fonts.mappings=mappings
+local allocate=utilities.storage.allocate
+local hex=R("AF","af","09")
+local hexfour=(hex*hex*hex^-2)/function(s) return tonumber(s,16) end
+local hexsix=(hex*hex*hex^-4)/function(s) return tonumber(s,16) end
+local dec=(R("09")^1)/tonumber
+local period=P(".")
+local unicode=(P("uni")+P("UNI"))*(hexfour*(period+P(-1))*Cc(false)+Ct(hexfour^1)*Cc(true)) 
+local ucode=(P("u")+P("U") )*(hexsix*(period+P(-1))*Cc(false)+Ct(hexsix^1)*Cc(true)) 
+local index=P("index")*dec*Cc(false)
+local parser=unicode+ucode+index
+local parsers={}
+local function makenameparser(str)
+  if not str or str=="" then
+    return parser
+  else
+    local p=parsers[str]
+    if not p then
+      p=P(str)*period*dec*Cc(false)
+      parsers[str]=p
+    end
+    return p
+  end
+end
+local f_single=formatters["%04X"]
+local f_double=formatters["%04X%04X"]
+local function tounicode16(unicode)
+  if unicode<0xD7FF or (unicode>0xDFFF and unicode<=0xFFFF) then
+    return f_single(unicode)
+  else
+    unicode=unicode-0x10000
+    return f_double(floor(unicode/1024)+0xD800,unicode%1024+0xDC00)
+  end
+end
+local function tounicode16sequence(unicodes)
+  local t={}
+  for l=1,#unicodes do
+    local u=unicodes[l]
+    if u<0xD7FF or (u>0xDFFF and u<=0xFFFF) then
+      t[l]=f_single(u)
+    else
+      u=u-0x10000
+      t[l]=f_double(floor(u/1024)+0xD800,u%1024+0xDC00)
+    end
+  end
+  return concat(t)
+end
+local function tounicode(unicode,name)
+  if type(unicode)=="table" then
+    local t={}
+    for l=1,#unicode do
+      local u=unicode[l]
+      if u<0xD7FF or (u>0xDFFF and u<=0xFFFF) then
+        t[l]=f_single(u)
+      else
+        u=u-0x10000
+        t[l]=f_double(floor(u/1024)+0xD800,u%1024+0xDC00)
+      end
+    end
+    return concat(t)
+  else
+    if unicode<0xD7FF or (unicode>0xDFFF and unicode<=0xFFFF) then
+      return f_single(unicode)
+    else
+      unicode=unicode-0x10000
+      return f_double(floor(unicode/1024)+0xD800,unicode%1024+0xDC00)
+    end
+  end
+end
+local function fromunicode16(str)
+  if #str==4 then
+    return tonumber(str,16)
+  else
+    local l,r=match(str,"(....)(....)")
+    return 0x10000+(tonumber(l,16)-0xD800)*0x400+tonumber(r,16)-0xDC00
+  end
+end
+mappings.makenameparser=makenameparser
+mappings.tounicode=tounicode
+mappings.tounicode16=tounicode16
+mappings.tounicode16sequence=tounicode16sequence
+mappings.fromunicode16=fromunicode16
+local ligseparator=P("_")
+local varseparator=P(".")
+local namesplitter=Ct(C((1-ligseparator-varseparator)^1)*(ligseparator*C((1-ligseparator-varseparator)^1))^0)
+do
+  local overloads=allocate {
+    IJ={ name="I_J",unicode={ 0x49,0x4A },mess=0x0132 },
+    ij={ name="i_j",unicode={ 0x69,0x6A },mess=0x0133 },
+    ff={ name="f_f",unicode={ 0x66,0x66 },mess=0xFB00 },
+    fi={ name="f_i",unicode={ 0x66,0x69 },mess=0xFB01 },
+    fl={ name="f_l",unicode={ 0x66,0x6C },mess=0xFB02 },
+    ffi={ name="f_f_i",unicode={ 0x66,0x66,0x69 },mess=0xFB03 },
+    ffl={ name="f_f_l",unicode={ 0x66,0x66,0x6C },mess=0xFB04 },
+    fj={ name="f_j",unicode={ 0x66,0x6A } },
+    fk={ name="f_k",unicode={ 0x66,0x6B } },
+  }
+  local o={}
+  for k,v in next,overloads do
+    local name=v.name
+    local mess=v.mess
+    if name then
+      o[name]=v
+    end
+    if mess then
+      o[mess]=v
+    end
+    o[k]=v
+  end
+  mappings.overloads=o
+end
+function mappings.addtounicode(data,filename,checklookups,forceligatures)
+  local resources=data.resources
+  local unicodes=resources.unicodes
+  if not unicodes then
+    if trace_mapping then
+      report_fonts("no unicode list, quitting tounicode for %a",filename)
+    end
+    return
+  end
+  local properties=data.properties
+  local descriptions=data.descriptions
+  local overloads=mappings.overloads
+  unicodes['space']=unicodes['space'] or 32
+  unicodes['hyphen']=unicodes['hyphen'] or 45
+  unicodes['zwj']=unicodes['zwj']  or 0x200D
+  unicodes['zwnj']=unicodes['zwnj']  or 0x200C
+  local private=fonts.constructors and fonts.constructors.privateoffset or 0xF0000 
+  local unicodevector=fonts.encodings.agl.unicodes or {} 
+  local contextvector=fonts.encodings.agl.ctxcodes or {} 
+  local missing={}
+  local nofmissing=0
+  local oparser=nil
+  local cidnames=nil
+  local cidcodes=nil
+  local cidinfo=properties.cidinfo
+  local usedmap=cidinfo and fonts.cid.getmap(cidinfo)
+  local uparser=makenameparser() 
+  if usedmap then
+     oparser=usedmap and makenameparser(cidinfo.ordering)
+     cidnames=usedmap.names
+     cidcodes=usedmap.unicodes
+  end
+  local ns=0
+  local nl=0
+  local dlist=sortedkeys(descriptions)
+  for i=1,#dlist do
+    local du=dlist[i]
+    local glyph=descriptions[du]
+    local name=glyph.name
+    if name then
+      local overload=overloads[name] or overloads[du]
+      if overload then
+        glyph.unicode=overload.unicode
+      else
+        local gu=glyph.unicode 
+        if not gu or gu==-1 or du>=private or (du>=0xE000 and du<=0xF8FF) or du==0xFFFE or du==0xFFFF then
+          local unicode=unicodevector[name] or contextvector[name]
+          if unicode then
+            glyph.unicode=unicode
+            ns=ns+1
+          end
+          if (not unicode) and usedmap then
+            local foundindex=lpegmatch(oparser,name)
+            if foundindex then
+              unicode=cidcodes[foundindex] 
+              if unicode then
+                glyph.unicode=unicode
+                ns=ns+1
+              else
+                local reference=cidnames[foundindex] 
+                if reference then
+                  local foundindex=lpegmatch(oparser,reference)
+                  if foundindex then
+                    unicode=cidcodes[foundindex]
+                    if unicode then
+                      glyph.unicode=unicode
+                      ns=ns+1
+                    end
+                  end
+                  if not unicode or unicode=="" then
+                    local foundcodes,multiple=lpegmatch(uparser,reference)
+                    if foundcodes then
+                      glyph.unicode=foundcodes
+                      if multiple then
+                        nl=nl+1
+                        unicode=true
+                      else
+                        ns=ns+1
+                        unicode=foundcodes
+                      end
+                    end
+                  end
+                end
+              end
+            end
+          end
+          if not unicode or unicode=="" then
+            local split=lpegmatch(namesplitter,name)
+            local nsplit=split and #split or 0 
+            if nsplit==0 then
+            elseif nsplit==1 then
+              local base=split[1]
+              local u=unicodes[base] or unicodevector[base] or contextvector[name]
+              if not u then
+              elseif type(u)=="table" then
+                if u[1]<private then
+                  unicode=u
+                  glyph.unicode=unicode
+                end
+              elseif u<private then
+                unicode=u
+                glyph.unicode=unicode
+              end
+            else
+              local t,n={},0
+              for l=1,nsplit do
+                local base=split[l]
+                local u=unicodes[base] or unicodevector[base] or contextvector[name]
+                if not u then
+                  break
+                elseif type(u)=="table" then
+                  if u[1]>=private then
+                    break
+                  end
+                  n=n+1
+                  t[n]=u[1]
+                else
+                  if u>=private then
+                    break
+                  end
+                  n=n+1
+                  t[n]=u
+                end
+              end
+              if n>0 then
+                if n==1 then
+                  unicode=t[1]
+                else
+                  unicode=t
+                end
+                glyph.unicode=unicode
+              end
+            end
+            nl=nl+1
+          end
+          if not unicode or unicode=="" then
+            local foundcodes,multiple=lpegmatch(uparser,name)
+            if foundcodes then
+              glyph.unicode=foundcodes
+              if multiple then
+                nl=nl+1
+                unicode=true
+              else
+                ns=ns+1
+                unicode=foundcodes
+              end
+            end
+          end
+          local r=overloads[unicode]
+          if r then
+            unicode=r.unicode
+            glyph.unicode=unicode
+          end
+          if not unicode then
+            missing[du]=true
+            nofmissing=nofmissing+1
+          end
+        end
+      end
+    else
+      local overload=overloads[du]
+      if overload then
+        glyph.unicode=overload.unicode
+      end
+    end
+  end
+  if type(checklookups)=="function" then
+    checklookups(data,missing,nofmissing)
+  end
+  local unicoded=0
+  local collected=fonts.handlers.otf.readers.getcomponents(data) 
+  local function resolve(glyph,u)
+    local n=#u
+    for i=1,n do
+      if u[i]>private then
+        n=0
+        break
+      end
+    end
+    if n>0 then
+      if n>1 then
+        glyph.unicode=u
+      else
+        glyph.unicode=u[1]
+      end
+      unicoded=unicoded+1
+    end
+  end
+  if not collected then
+  elseif forceligatures or force_ligatures then
+    for i=1,#dlist do
+      local du=dlist[i]
+      if du>=private or (du>=0xE000 and du<=0xF8FF) then
+        local u=collected[du] 
+        if u then
+          resolve(descriptions[du],u)
+        end
+      end
+    end
+  else
+    for i=1,#dlist do
+      local du=dlist[i]
+      if du>=private or (du>=0xE000 and du<=0xF8FF) then
+        local glyph=descriptions[du]
+        if glyph.class=="ligature" and not glyph.unicode then
+          local u=collected[du] 
+          if u then
+             resolve(glyph,u)
+          end
+        end
+      end
+    end
+  end
+  if trace_mapping and unicoded>0 then
+    report_fonts("%n ligature tounicode mappings deduced from gsub ligature features",unicoded)
+  end
+  if trace_mapping then
+    for i=1,#dlist do
+      local du=dlist[i]
+      local glyph=descriptions[du]
+      local name=glyph.name or "-"
+      local index=glyph.index or 0
+      local unicode=glyph.unicode
+      if unicode then
+        if type(unicode)=="table" then
+          local unicodes={}
+          for i=1,#unicode do
+            unicodes[i]=formatters("%U",unicode[i])
+          end
+          report_fonts("internal slot %U, name %a, unicode %U, tounicode % t",index,name,du,unicodes)
+        else
+          report_fonts("internal slot %U, name %a, unicode %U, tounicode %U",index,name,du,unicode)
+        end
+      else
+        report_fonts("internal slot %U, name %a, unicode %U",index,name,du)
+      end
+    end
+  end
+  if trace_loading and (ns>0 or nl>0) then
+    report_fonts("%s tounicode entries added, ligatures %s",nl+ns,ns)
+  end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['luatex-fonts-syn']={
+  version=1.001,
+  comment="companion to luatex-*.tex",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+if context then
+  texio.write_nl("fatal error: this module is not for context")
+  os.exit()
+end
+local fonts=fonts
+fonts.names=fonts.names or {}
+fonts.names.version=1.001 
+fonts.names.basename="luatex-fonts-names"
+fonts.names.cache=containers.define("fonts","data",fonts.names.version,true)
+local data=nil
+local loaded=false
+local fileformats={ "lua","tex","other text files" }
+function fonts.names.reportmissingbase()
+  texio.write("<missing font database, run: mtxrun --script fonts --reload --simple>")
+  fonts.names.reportmissingbase=nil
+end
+function fonts.names.reportmissingname()
+  texio.write("<unknown font in database, run: mtxrun --script fonts --reload --simple>")
+  fonts.names.reportmissingname=nil
+end
+function fonts.names.resolve(name,sub)
+  if not loaded then
+    local basename=fonts.names.basename
+    if basename and basename~="" then
+      data=containers.read(fonts.names.cache,basename)
+      if not data then
+        basename=file.addsuffix(basename,"lua")
+        for i=1,#fileformats do
+          local format=fileformats[i]
+          local foundname=resolvers.findfile(basename,format) or ""
+          if foundname~="" then
+            data=dofile(foundname)
+            texio.write("<font database loaded: ",foundname,">")
+            break
+          end
+        end
+      end
+    end
+    loaded=true
+  end
+  if type(data)=="table" and data.version==fonts.names.version then
+    local condensed=string.gsub(string.lower(name),"[^%a%d]","")
+    local found=data.mappings and data.mappings[condensed]
+    if found then
+      local fontname,filename,subfont=found[1],found[2],found[3]
+      if subfont then
+        return filename,fontname
+      else
+        return filename,false
+      end
+    elseif fonts.names.reportmissingname then
+      fonts.names.reportmissingname()
+      return name,false 
+    end
+  elseif fonts.names.reportmissingbase then
+    fonts.names.reportmissingbase()
+  end
+end
+fonts.names.resolvespec=fonts.names.resolve 
+function fonts.names.getfilename(askedname,suffix) 
+  return ""
+end
+function fonts.names.ignoredfile(filename) 
+  return false 
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-oti']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local lower=string.lower
+local fonts=fonts
+local constructors=fonts.constructors
+local otf=constructors.handlers.otf
+local otffeatures=constructors.features.otf
+local registerotffeature=otffeatures.register
+local otftables=otf.tables or {}
+otf.tables=otftables
+local allocate=utilities.storage.allocate
+registerotffeature {
+  name="features",
+  description="initialization of feature handler",
+  default=true,
+}
+local function setmode(tfmdata,value)
+  if value then
+    tfmdata.properties.mode=lower(value)
+  end
+end
+otf.modeinitializer=setmode
+local function setlanguage(tfmdata,value)
+  if value then
+    local cleanvalue=lower(value)
+    local languages=otftables and otftables.languages
+    local properties=tfmdata.properties
+    if not languages then
+      properties.language=cleanvalue
+    elseif languages[value] then
+      properties.language=cleanvalue
+    else
+      properties.language="dflt"
+    end
+  end
+end
+local function setscript(tfmdata,value)
+  if value then
+    local cleanvalue=lower(value)
+    local scripts=otftables and otftables.scripts
+    local properties=tfmdata.properties
+    if not scripts then
+      properties.script=cleanvalue
+    elseif scripts[value] then
+      properties.script=cleanvalue
+    else
+      properties.script="dflt"
+    end
+  end
+end
+registerotffeature {
+  name="mode",
+  description="mode",
+  initializers={
+    base=setmode,
+    node=setmode,
+    plug=setmode,
+  }
+}
+registerotffeature {
+  name="language",
+  description="language",
+  initializers={
+    base=setlanguage,
+    node=setlanguage,
+    plug=setlanguage,
+  }
+}
+registerotffeature {
+  name="script",
+  description="script",
+  initializers={
+    base=setscript,
+    node=setscript,
+    plug=setscript,
+  }
+}
+otftables.featuretypes=allocate {
+  gpos_single="position",
+  gpos_pair="position",
+  gpos_cursive="position",
+  gpos_mark2base="position",
+  gpos_mark2ligature="position",
+  gpos_mark2mark="position",
+  gpos_context="position",
+  gpos_contextchain="position",
+  gsub_single="substitution",
+  gsub_multiple="substitution",
+  gsub_alternate="substitution",
+  gsub_ligature="substitution",
+  gsub_context="substitution",
+  gsub_contextchain="substitution",
+  gsub_reversecontextchain="substitution",
+  gsub_reversesub="substitution",
+}
+function otffeatures.checkeddefaultscript(featuretype,autoscript,scripts)
+  if featuretype=="position" then
+    local default=scripts.dflt
+    if default then
+      if autoscript=="position" or autoscript==true then
+        return default
+      else
+        report_otf("script feature %s not applied, enable default positioning")
+      end
+    else
+    end
+  elseif featuretype=="substitution" then
+    local default=scripts.dflt
+    if default then
+      if autoscript=="substitution" or autoscript==true then
+        return default
+      end
+    end
+  end
+end
+function otffeatures.checkeddefaultlanguage(featuretype,autolanguage,languages)
+  if featuretype=="position" then
+    local default=languages.dflt
+    if default then
+      if autolanguage=="position" or autolanguage==true then
+        return default
+      else
+        report_otf("language feature %s not applied, enable default positioning")
+      end
+    else
+    end
+  elseif featuretype=="substitution" then
+    local default=languages.dflt
+    if default then
+      if autolanguage=="substitution" or autolanguage==true then
+        return default
+      end
+    end
+  end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-otr']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local next,type,tonumber=next,type,tonumber
+local byte,lower,char,gsub=string.byte,string.lower,string.char,string.gsub
+local floor,round=math.floor,math.round
+local P,R,S,C,Cs,Cc,Ct,Carg,Cmt=lpeg.P,lpeg.R,lpeg.S,lpeg.C,lpeg.Cs,lpeg.Cc,lpeg.Ct,lpeg.Carg,lpeg.Cmt
+local lpegmatch=lpeg.match
+local setmetatableindex=table.setmetatableindex
+local formatters=string.formatters
+local sortedkeys=table.sortedkeys
+local sortedhash=table.sortedhash
+local stripstring=string.nospaces
+local utf16_to_utf8_be=utf.utf16_to_utf8_be
+local report=logs.reporter("otf reader")
+local trace_cmap=false 
+local trace_cmap_detail=false
+fonts=fonts or {}
+local handlers=fonts.handlers or {}
+fonts.handlers=handlers
+local otf=handlers.otf or {}
+handlers.otf=otf
+local readers=otf.readers or {}
+otf.readers=readers
+local streamreader=utilities.files  
+local streamwriter=utilities.files
+readers.streamreader=streamreader
+readers.streamwriter=streamwriter
+local openfile=streamreader.open
+local closefile=streamreader.close
+local setposition=streamreader.setposition
+local skipshort=streamreader.skipshort
+local readbytes=streamreader.readbytes
+local readstring=streamreader.readstring
+local readbyte=streamreader.readcardinal1 
+local readushort=streamreader.readcardinal2 
+local readuint=streamreader.readcardinal3 
+local readulong=streamreader.readcardinal4
+local readshort=streamreader.readinteger2  
+local readlong=streamreader.readinteger4  
+local readfixed=streamreader.readfixed4
+local read2dot14=streamreader.read2dot14   
+local readfword=readshort          
+local readufword=readushort         
+local readoffset=readushort
+function streamreader.readtag(f)
+  return lower(stripstring(readstring(f,4)))
+end
+local function readlongdatetime(f)
+  local a,b,c,d,e,f,g,h=readbytes(f,8)
+  return 0x100000000*d+0x1000000*e+0x10000*f+0x100*g+h
+end
+local tableversion=0.004
+readers.tableversion=tableversion
+local privateoffset=fonts.constructors and fonts.constructors.privateoffset or 0xF0000
+local reservednames={ [0]="copyright",
+  "family",
+  "subfamily",
+  "uniqueid",
+  "fullname",
+  "version",
+  "postscriptname",
+  "trademark",
+  "manufacturer",
+  "designer",
+  "description",
+  "vendorurl",
+  "designerurl",
+  "license",
+  "licenseurl",
+  "reserved",
+  "typographicfamily",
+  "typographicsubfamily",
+  "compatiblefullname",
+  "sampletext",
+  "cidfindfontname",
+  "wwsfamily",
+  "wwssubfamily",
+  "lightbackgroundpalette",
+  "darkbackgroundpalette",
+  "variationspostscriptnameprefix",
+}
+local platforms={ [0]="unicode",
+  "macintosh",
+  "iso",
+  "windows",
+  "custom",
+}
+local encodings={
+  unicode={ [0]="unicode 1.0 semantics",
+    "unicode 1.1 semantics",
+    "iso/iec 10646",
+    "unicode 2.0 bmp",
+    "unicode 2.0 full",
+    "unicode variation sequences",
+    "unicode full repertoire",
+  },
+  macintosh={ [0]="roman","japanese","chinese (traditional)","korean","arabic","hebrew","greek","russian",
+    "rsymbol","devanagari","gurmukhi","gujarati","oriya","bengali","tamil","telugu","kannada",
+    "malayalam","sinhalese","burmese","khmer","thai","laotian","georgian","armenian",
+    "chinese (simplified)","tibetan","mongolian","geez","slavic","vietnamese","sindhi",
+    "uninterpreted",
+  },
+  iso={ [0]="7-bit ascii",
+    "iso 10646",
+    "iso 8859-1",
+  },
+  windows={ [0]="symbol",
+    "unicode bmp",
+    "shiftjis",
+    "prc",
+    "big5",
+    "wansung",
+    "johab",
+    "reserved 7",
+    "reserved 8",
+    "reserved 9",
+    "unicode ucs-4",
+  },
+  custom={
+  }
+}
+local decoders={
+  unicode={},
+  macintosh={},
+  iso={},
+  windows={
+    ["unicode semantics"]=utf16_to_utf8_be,
+    ["unicode bmp"]=utf16_to_utf8_be,
+    ["unicode full"]=utf16_to_utf8_be,
+    ["unicode 1.0 semantics"]=utf16_to_utf8_be,
+    ["unicode 1.1 semantics"]=utf16_to_utf8_be,
+    ["unicode 2.0 bmp"]=utf16_to_utf8_be,
+    ["unicode 2.0 full"]=utf16_to_utf8_be,
+    ["unicode variation sequences"]=utf16_to_utf8_be,
+    ["unicode full repertoire"]=utf16_to_utf8_be,
+  },
+  custom={},
+}
+local languages={
+  unicode={
+    [ 0]="english",
+  },
+  macintosh={
+    [ 0]="english",
+  },
+  iso={},
+  windows={
+    [0x0409]="english - united states",
+  },
+  custom={},
+}
+local standardromanencoding={ [0]=
+  "notdef",".null","nonmarkingreturn","space","exclam","quotedbl",
+  "numbersign","dollar","percent","ampersand","quotesingle","parenleft",
+  "parenright","asterisk","plus","comma","hyphen","period","slash",
+  "zero","one","two","three","four","five","six","seven","eight",
+  "nine","colon","semicolon","less","equal","greater","question","at",
+  "A","B","C","D","E","F","G","H","I","J","K","L","M","N","O",
+  "P","Q","R","S","T","U","V","W","X","Y","Z","bracketleft",
+  "backslash","bracketright","asciicircum","underscore","grave","a","b",
+  "c","d","e","f","g","h","i","j","k","l","m","n","o","p","q",
+  "r","s","t","u","v","w","x","y","z","braceleft","bar",
+  "braceright","asciitilde","Adieresis","Aring","Ccedilla","Eacute",
+  "Ntilde","Odieresis","Udieresis","aacute","agrave","acircumflex",
+  "adieresis","atilde","aring","ccedilla","eacute","egrave",
+  "ecircumflex","edieresis","iacute","igrave","icircumflex","idieresis",
+  "ntilde","oacute","ograve","ocircumflex","odieresis","otilde","uacute",
+  "ugrave","ucircumflex","udieresis","dagger","degree","cent","sterling",
+  "section","bullet","paragraph","germandbls","registered","copyright",
+  "trademark","acute","dieresis","notequal","AE","Oslash","infinity",
+  "plusminus","lessequal","greaterequal","yen","mu","partialdiff",
+  "summation","product","pi","integral","ordfeminine","ordmasculine",
+  "Omega","ae","oslash","questiondown","exclamdown","logicalnot",
+  "radical","florin","approxequal","Delta","guillemotleft",
+  "guillemotright","ellipsis","nonbreakingspace","Agrave","Atilde",
+  "Otilde","OE","oe","endash","emdash","quotedblleft","quotedblright",
+  "quoteleft","quoteright","divide","lozenge","ydieresis","Ydieresis",
+  "fraction","currency","guilsinglleft","guilsinglright","fi","fl",
+  "daggerdbl","periodcentered","quotesinglbase","quotedblbase",
+  "perthousand","Acircumflex","Ecircumflex","Aacute","Edieresis","Egrave",
+  "Iacute","Icircumflex","Idieresis","Igrave","Oacute","Ocircumflex",
+  "apple","Ograve","Uacute","Ucircumflex","Ugrave","dotlessi",
+  "circumflex","tilde","macron","breve","dotaccent","ring","cedilla",
+  "hungarumlaut","ogonek","caron","Lslash","lslash","Scaron","scaron",
+  "Zcaron","zcaron","brokenbar","Eth","eth","Yacute","yacute","Thorn",
+  "thorn","minus","multiply","onesuperior","twosuperior","threesuperior",
+  "onehalf","onequarter","threequarters","franc","Gbreve","gbreve",
+  "Idotaccent","Scedilla","scedilla","Cacute","cacute","Ccaron","ccaron",
+  "dcroat",
+}
+local weights={
+  [100]="thin",
+  [200]="extralight",
+  [300]="light",
+  [400]="normal",
+  [500]="medium",
+  [600]="semibold",
+  [700]="bold",
+  [800]="extrabold",
+  [900]="black",
+}
+local widths={
+  [1]="ultracondensed",
+  [2]="extracondensed",
+  [3]="condensed",
+  [4]="semicondensed",
+  [5]="normal",
+  [6]="semiexpanded",
+  [7]="expanded",
+  [8]="extraexpanded",
+  [9]="ultraexpanded",
+}
+setmetatableindex(weights,function(t,k)
+  local r=floor((k+50)/100)*100
+  local v=(r>900 and "black") or rawget(t,r) or "normal"
+  return v
+end)
+setmetatableindex(widths,function(t,k)
+  return "normal"
+end)
+local panoseweights={
+  [ 0]="normal",
+  [ 1]="normal",
+  [ 2]="verylight",
+  [ 3]="light",
+  [ 4]="thin",
+  [ 5]="book",
+  [ 6]="medium",
+  [ 7]="demi",
+  [ 8]="bold",
+  [ 9]="heavy",
+  [10]="black",
+}
+local panosewidths={
+  [ 0]="normal",
+  [ 1]="normal",
+  [ 2]="normal",
+  [ 3]="normal",
+  [ 4]="normal",
+  [ 5]="expanded",
+  [ 6]="condensed",
+  [ 7]="veryexpanded",
+  [ 8]="verycondensed",
+  [ 9]="monospaced",
+}
+local helpers={}
+readers.helpers=helpers
+local function gotodatatable(f,fontdata,tag,criterium)
+  if criterium and f then
+    local datatable=fontdata.tables[tag]
+    if datatable then
+      local tableoffset=datatable.offset
+      setposition(f,tableoffset)
+      return tableoffset
+    end
+  end
+end
+local function reportskippedtable(f,fontdata,tag,criterium)
+  if criterium and f then
+    local datatable=fontdata.tables[tag]
+    if datatable then
+      report("loading of table %a skipped",tag)
+    end
+  end
+end
+local function setvariabledata(fontdata,tag,data)
+  local variabledata=fontdata.variabledata
+  if variabledata then
+    variabledata[tag]=data
+  else
+    fontdata.variabledata={ [tag]=data }
+  end
+end
+helpers.gotodatatable=gotodatatable
+helpers.setvariabledata=setvariabledata
+helpers.reportskippedtable=reportskippedtable
+local platformnames={
+  postscriptname=true,
+  fullname=true,
+  family=true,
+  subfamily=true,
+  typographicfamily=true,
+  typographicsubfamily=true,
+  compatiblefullname=true,
+}
+function readers.name(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"name",true)
+  if tableoffset then
+    local format=readushort(f)
+    local nofnames=readushort(f)
+    local offset=readushort(f)
+    local start=tableoffset+offset
+    local namelists={
+      unicode={},
+      windows={},
+      macintosh={},
+    }
+    for i=1,nofnames do
+      local platform=platforms[readushort(f)]
+      if platform then
+        local namelist=namelists[platform]
+        if namelist then
+          local encoding=readushort(f)
+          local language=readushort(f)
+          local encodings=encodings[platform]
+          local languages=languages[platform]
+          if encodings and languages then
+            local encoding=encodings[encoding]
+            local language=languages[language]
+            if encoding and language then
+              local index=readushort(f)
+              local name=reservednames[index]
+              namelist[#namelist+1]={
+                platform=platform,
+                encoding=encoding,
+                language=language,
+                name=name,
+                index=index,
+                length=readushort(f),
+                offset=start+readushort(f),
+              }
+            else
+              skipshort(f,3)
+            end
+          else
+            skipshort(f,3)
+          end
+        else
+          skipshort(f,5)
+        end
+      else
+        skipshort(f,5)
+      end
+    end
+    local names={}
+    local done={}
+    local extras={}
+    local function filter(platform,e,l)
+      local namelist=namelists[platform]
+      for i=1,#namelist do
+        local name=namelist[i]
+        local nametag=name.name
+        local index=name.index
+        if not done[nametag or i] then
+          local encoding=name.encoding
+          local language=name.language
+          if (not e or encoding==e) and (not l or language==l) then
+            setposition(f,name.offset)
+            local content=readstring(f,name.length)
+            local decoder=decoders[platform]
+            if decoder then
+              decoder=decoder[encoding]
+            end
+            if decoder then
+              content=decoder(content)
+            end
+            if nametag then
+              names[nametag]={
+                content=content,
+                platform=platform,
+                encoding=encoding,
+                language=language,
+              }
+            end
+            extras[index]=content
+            done[nametag or i]=true
+          end
+        end
+      end
+    end
+    filter("windows","unicode bmp","english - united states")
+    filter("macintosh","roman","english")
+    filter("windows")
+    filter("macintosh")
+    filter("unicode")
+    fontdata.names=names
+    fontdata.extras=extras
+    if specification.platformnames then
+      local collected={}
+      for platform,namelist in next,namelists do
+        local filtered=false
+        for i=1,#namelist do
+          local entry=namelist[i]
+          local name=entry.name
+          if platformnames[name] then
+            setposition(f,entry.offset)
+            local content=readstring(f,entry.length)
+            local encoding=entry.encoding
+            local decoder=decoders[platform]
+            if decoder then
+              decoder=decoder[encoding]
+            end
+            if decoder then
+              content=decoder(content)
+            end
+            if filtered then
+              filtered[name]=content
+            else
+              filtered={ [name]=content }
+            end
+          end
+        end
+        if filtered then
+          collected[platform]=filtered
+        end
+      end
+      fontdata.platformnames=collected
+    end
+  else
+    fontdata.names={}
+  end
+end
+local validutf=lpeg.patterns.validutf8
+local function getname(fontdata,key)
+  local names=fontdata.names
+  if names then
+    local value=names[key]
+    if value then
+      local content=value.content
+      return lpegmatch(validutf,content) and content or nil
+    end
+  end
+end
+readers["os/2"]=function(f,fontdata)
+  local tableoffset=gotodatatable(f,fontdata,"os/2",true)
+  if tableoffset then
+    local version=readushort(f)
+    local windowsmetrics={
+      version=version,
+      averagewidth=readshort(f),
+      weightclass=readushort(f),
+      widthclass=readushort(f),
+      fstype=readushort(f),
+      subscriptxsize=readshort(f),
+      subscriptysize=readshort(f),
+      subscriptxoffset=readshort(f),
+      subscriptyoffset=readshort(f),
+      superscriptxsize=readshort(f),
+      superscriptysize=readshort(f),
+      superscriptxoffset=readshort(f),
+      superscriptyoffset=readshort(f),
+      strikeoutsize=readshort(f),
+      strikeoutpos=readshort(f),
+      familyclass=readshort(f),
+      panose={ readbytes(f,10) },
+      unicoderanges={ readulong(f),readulong(f),readulong(f),readulong(f) },
+      vendor=readstring(f,4),
+      fsselection=readushort(f),
+      firstcharindex=readushort(f),
+      lastcharindex=readushort(f),
+      typoascender=readshort(f),
+      typodescender=readshort(f),
+      typolinegap=readshort(f),
+      winascent=readushort(f),
+      windescent=readushort(f),
+    }
+    if version>=1 then
+      windowsmetrics.codepageranges={ readulong(f),readulong(f) }
+    end
+    if version>=3 then
+      windowsmetrics.xheight=readshort(f)
+      windowsmetrics.capheight=readshort(f)
+      windowsmetrics.defaultchar=readushort(f)
+      windowsmetrics.breakchar=readushort(f)
+    end
+    windowsmetrics.weight=windowsmetrics.weightclass and weights[windowsmetrics.weightclass]
+    windowsmetrics.width=windowsmetrics.widthclass and widths [windowsmetrics.widthclass]
+    windowsmetrics.panoseweight=panoseweights[windowsmetrics.panose[3]]
+    windowsmetrics.panosewidth=panosewidths [windowsmetrics.panose[4]]
+    fontdata.windowsmetrics=windowsmetrics
+  else
+    fontdata.windowsmetrics={}
+  end
+end
+readers.head=function(f,fontdata)
+  local tableoffset=gotodatatable(f,fontdata,"head",true)
+  if tableoffset then
+    local fontheader={
+      version=readfixed(f),
+      revision=readfixed(f),
+      checksum=readulong(f),
+      magic=readulong(f),
+      flags=readushort(f),
+      units=readushort(f),
+      created=readlongdatetime(f),
+      modified=readlongdatetime(f),
+      xmin=readshort(f),
+      ymin=readshort(f),
+      xmax=readshort(f),
+      ymax=readshort(f),
+      macstyle=readushort(f),
+      smallpixels=readushort(f),
+      directionhint=readshort(f),
+      indextolocformat=readshort(f),
+      glyphformat=readshort(f),
+    }
+    fontdata.fontheader=fontheader
+  else
+    fontdata.fontheader={}
+  end
+  fontdata.nofglyphs=0
+end
+readers.hhea=function(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"hhea",specification.details)
+  if tableoffset then
+    fontdata.horizontalheader={
+      version=readfixed(f),
+      ascender=readfword(f),
+      descender=readfword(f),
+      linegap=readfword(f),
+      maxadvancewidth=readufword(f),
+      minleftsidebearing=readfword(f),
+      minrightsidebearing=readfword(f),
+      maxextent=readfword(f),
+      caretsloperise=readshort(f),
+      caretsloperun=readshort(f),
+      caretoffset=readshort(f),
+      reserved_1=readshort(f),
+      reserved_2=readshort(f),
+      reserved_3=readshort(f),
+      reserved_4=readshort(f),
+      metricdataformat=readshort(f),
+      nofmetrics=readushort(f),
+    }
+  else
+    fontdata.horizontalheader={
+      nofmetrics=0,
+    }
+  end
+end
+readers.vhea=function(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"vhea",specification.details)
+  if tableoffset then
+    fontdata.verticalheader={
+      version=readfixed(f),
+      ascender=readfword(f),
+      descender=readfword(f),
+      linegap=readfword(f),
+      maxadvanceheight=readufword(f),
+      mintopsidebearing=readfword(f),
+      minbottomsidebearing=readfword(f),
+      maxextent=readfword(f),
+      caretsloperise=readshort(f),
+      caretsloperun=readshort(f),
+      caretoffset=readshort(f),
+      reserved_1=readshort(f),
+      reserved_2=readshort(f),
+      reserved_3=readshort(f),
+      reserved_4=readshort(f),
+      metricdataformat=readshort(f),
+      nofmetrics=readushort(f),
+    }
+  else
+    fontdata.verticalheader={
+      nofmetrics=0,
+    }
+  end
+end
+readers.maxp=function(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"maxp",specification.details)
+  if tableoffset then
+    local version=readfixed(f)
+    local nofglyphs=readushort(f)
+    fontdata.nofglyphs=nofglyphs
+    if version==0.5 then
+      fontdata.maximumprofile={
+        version=version,
+        nofglyphs=nofglyphs,
+      }
+    elseif version==1.0 then
+      fontdata.maximumprofile={
+        version=version,
+        nofglyphs=nofglyphs,
+        points=readushort(f),
+        contours=readushort(f),
+        compositepoints=readushort(f),
+        compositecontours=readushort(f),
+        zones=readushort(f),
+        twilightpoints=readushort(f),
+        storage=readushort(f),
+        functiondefs=readushort(f),
+        instructiondefs=readushort(f),
+        stackelements=readushort(f),
+        sizeofinstructions=readushort(f),
+        componentelements=readushort(f),
+        componentdepth=readushort(f),
+      }
+    else
+      fontdata.maximumprofile={
+        version=version,
+        nofglyphs=0,
+      }
+    end
+  end
+end
+readers.hmtx=function(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"hmtx",specification.glyphs)
+  if tableoffset then
+    local horizontalheader=fontdata.horizontalheader
+    local nofmetrics=horizontalheader.nofmetrics
+    local glyphs=fontdata.glyphs
+    local nofglyphs=fontdata.nofglyphs
+    local width=0 
+    local leftsidebearing=0
+    for i=0,nofmetrics-1 do
+      local glyph=glyphs[i]
+      width=readshort(f)
+      leftsidebearing=readshort(f)
+      if width~=0 then
+        glyph.width=width
+      end
+    end
+    for i=nofmetrics,nofglyphs-1 do
+      local glyph=glyphs[i]
+      if width~=0 then
+        glyph.width=width
+      end
+    end
+  end
+end
+readers.vmtx=function(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"vmtx",specification.glyphs)
+  if tableoffset then
+    local verticalheader=fontdata.verticalheader
+    local nofmetrics=verticalheader.nofmetrics
+    local glyphs=fontdata.glyphs
+    local nofglyphs=fontdata.nofglyphs
+    local vheight=0
+    local vdefault=verticalheader.ascender+verticalheader.descender
+    local topsidebearing=0
+    for i=0,nofmetrics-1 do
+      local glyph=glyphs[i]
+      vheight=readshort(f)
+      topsidebearing=readshort(f)
+      if vheight~=0 and vheight~=vdefault then
+        glyph.vheight=vheight
+      end
+    end
+    for i=nofmetrics,nofglyphs-1 do
+      local glyph=glyphs[i]
+      if vheight~=0 and vheight~=vdefault then
+        glyph.vheight=vheight
+      end
+    end
+  end
+end
+readers.vorg=function(f,fontdata,specification)
+  reportskippedtable(f,fontdata,"vorg",specification.glyphs)
+end
+readers.post=function(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"post",true)
+  if tableoffset then
+    local version=readfixed(f)
+    fontdata.postscript={
+      version=version,
+      italicangle=round(1000*readfixed(f))/1000,
+      underlineposition=readfword(f),
+      underlinethickness=readfword(f),
+      monospaced=readulong(f),
+      minmemtype42=readulong(f),
+      maxmemtype42=readulong(f),
+      minmemtype1=readulong(f),
+      maxmemtype1=readulong(f),
+    }
+    if not specification.glyphs then
+    elseif version==1.0 then
+      for index=0,#standardromanencoding do
+        glyphs[index].name=standardromanencoding[index]
+      end
+    elseif version==2.0 then
+      local glyphs=fontdata.glyphs
+      local nofglyphs=readushort(f)
+      local indices={}
+      local names={}
+      local maxnames=0
+      for i=0,nofglyphs-1 do
+        local nameindex=readushort(f)
+        if nameindex>=258 then
+          maxnames=maxnames+1
+          nameindex=nameindex-257
+          indices[nameindex]=i
+        else
+          glyphs[i].name=standardromanencoding[nameindex]
+        end
+      end
+      for i=1,maxnames do
+        local mapping=indices[i]
+        if not mapping then
+          report("quit post name fetching at %a of %a: %s",i,maxnames,"no index")
+          break
+        else
+          local length=readbyte(f)
+          if length>0 then
+            glyphs[mapping].name=readstring(f,length)
+          else
+            report("quit post name fetching at %a of %a: %s",i,maxnames,"overflow")
+            break
+          end
+        end
+      end
+    elseif version==2.5 then
+    elseif version==3.0 then
+    end
+  else
+    fontdata.postscript={}
+  end
+end
+readers.cff=function(f,fontdata,specification)
+  reportskippedtable(f,fontdata,"cff",specification.glyphs)
+end
+local formatreaders={}
+local duplicatestoo=true
+local sequence={
+  { 3,1,4 },
+  { 3,10,12 },
+  { 0,3,4 },
+  { 0,1,4 },
+  { 0,0,6 },
+  { 3,0,6 },
+  { 0,5,14 },
+{ 0,4,12 },
+  { 3,10,13 },
+}
+local supported={}
+for i=1,#sequence do
+  local si=sequence[i]
+  local sp,se,sf=si[1],si[2],si[3]
+  local p=supported[sp]
+  if not p then
+    p={}
+    supported[sp]=p
+  end
+  local e=p[se]
+  if not e then
+    e={}
+    p[se]=e
+  end
+  e[sf]=true
+end
+formatreaders[4]=function(f,fontdata,offset)
+  setposition(f,offset+2)
+  local length=readushort(f) 
+  local language=readushort(f)
+  local nofsegments=readushort(f)/2
+  skipshort(f,3)
+  local endchars={}
+  local startchars={}
+  local deltas={}
+  local offsets={}
+  local indices={}
+  local mapping=fontdata.mapping
+  local glyphs=fontdata.glyphs
+  local duplicates=fontdata.duplicates
+  local nofdone=0
+  for i=1,nofsegments do
+    endchars[i]=readushort(f)
+  end
+  local reserved=readushort(f) 
+  for i=1,nofsegments do
+    startchars[i]=readushort(f)
+  end
+  for i=1,nofsegments do
+    deltas[i]=readshort(f)
+  end
+  for i=1,nofsegments do
+    offsets[i]=readushort(f)
+  end
+  local size=(length-2*2-5*2-4*nofsegments*2)/2
+  for i=1,size-1 do
+    indices[i]=readushort(f)
+  end
+  for segment=1,nofsegments do
+    local startchar=startchars[segment]
+    local endchar=endchars[segment]
+    local offset=offsets[segment]
+    local delta=deltas[segment]
+    if startchar==0xFFFF and endchar==0xFFFF then
+    elseif startchar==0xFFFF and offset==0 then
+    elseif offset==0xFFFF then
+    elseif offset==0 then
+      if trace_cmap_detail then
+        report("format 4.%i segment %2i from %C upto %C at index %H",1,segment,startchar,endchar,(startchar+delta)%65536)
+      end
+      for unicode=startchar,endchar do
+        local index=(unicode+delta)%65536
+        if index and index>0 then
+          local glyph=glyphs[index]
+          if glyph then
+            local gu=glyph.unicode
+            if not gu then
+              glyph.unicode=unicode
+              nofdone=nofdone+1
+            elseif gu~=unicode then
+              if duplicatestoo then
+                local d=duplicates[gu]
+                if d then
+                  d[unicode]=true
+                else
+                  duplicates[gu]={ [unicode]=true }
+                end
+              else
+                report("duplicate case 1: %C %04i %s",unicode,index,glyphs[index].name)
+              end
+            end
+            if not mapping[index] then
+              mapping[index]=unicode
+            end
+          end
+        end
+      end
+    else
+      local shift=(segment-nofsegments+offset/2)-startchar
+      if trace_cmap_detail then
+        report("format 4.%i segment %2i from %C upto %C at index %H",0,segment,startchar,endchar,(startchar+delta)%65536)
+      end
+      for unicode=startchar,endchar do
+        local slot=shift+unicode
+        local index=indices[slot]
+        if index and index>0 then
+          index=(index+delta)%65536
+          local glyph=glyphs[index]
+          if glyph then
+            local gu=glyph.unicode
+            if not gu then
+              glyph.unicode=unicode
+              nofdone=nofdone+1
+            elseif gu~=unicode then
+              if duplicatestoo then
+                local d=duplicates[gu]
+                if d then
+                  d[unicode]=true
+                else
+                  duplicates[gu]={ [unicode]=true }
+                end
+              else
+                report("duplicate case 2: %C %04i %s",unicode,index,glyphs[index].name)
+              end
+            end
+            if not mapping[index] then
+              mapping[index]=unicode
+            end
+          end
+        end
+      end
+    end
+  end
+  return nofdone
+end
+formatreaders[6]=function(f,fontdata,offset)
+  setposition(f,offset) 
+  local format=readushort(f)
+  local length=readushort(f)
+  local language=readushort(f)
+  local mapping=fontdata.mapping
+  local glyphs=fontdata.glyphs
+  local duplicates=fontdata.duplicates
+  local start=readushort(f)
+  local count=readushort(f)
+  local stop=start+count-1
+  local nofdone=0
+  if trace_cmap_detail then
+    report("format 6 from %C to %C",2,start,stop)
+  end
+  for unicode=start,stop do
+    local index=readushort(f)
+    if index>0 then
+      local glyph=glyphs[index]
+      if glyph then
+        local gu=glyph.unicode
+        if not gu then
+          glyph.unicode=unicode
+          nofdone=nofdone+1
+        elseif gu~=unicode then
+        end
+        if not mapping[index] then
+          mapping[index]=unicode
+        end
+      end
+    end
+  end
+  return nofdone
+end
+formatreaders[12]=function(f,fontdata,offset)
+  setposition(f,offset+2+2+4+4) 
+  local mapping=fontdata.mapping
+  local glyphs=fontdata.glyphs
+  local duplicates=fontdata.duplicates
+  local nofgroups=readulong(f)
+  local nofdone=0
+  for i=1,nofgroups do
+    local first=readulong(f)
+    local last=readulong(f)
+    local index=readulong(f)
+    if trace_cmap_detail then
+      report("format 12 from %C to %C starts at index %i",first,last,index)
+    end
+    for unicode=first,last do
+      local glyph=glyphs[index]
+      if glyph then
+        local gu=glyph.unicode
+        if not gu then
+          glyph.unicode=unicode
+          nofdone=nofdone+1
+        elseif gu~=unicode then
+          local d=duplicates[gu]
+          if d then
+            d[unicode]=true
+          else
+            duplicates[gu]={ [unicode]=true }
+          end
+        end
+        if not mapping[index] then
+          mapping[index]=unicode
+        end
+      end
+      index=index+1
+    end
+  end
+  return nofdone
+end
+formatreaders[13]=function(f,fontdata,offset)
+  setposition(f,offset+2+2+4+4) 
+  local mapping=fontdata.mapping
+  local glyphs=fontdata.glyphs
+  local duplicates=fontdata.duplicates
+  local nofgroups=readulong(f)
+  local nofdone=0
+  for i=1,nofgroups do
+    local first=readulong(f)
+    local last=readulong(f)
+    local index=readulong(f)
+    if first<privateoffset then
+      if trace_cmap_detail then
+        report("format 13 from %C to %C get index %i",first,last,index)
+      end
+      local glyph=glyphs[index]
+      local unicode=glyph.unicode
+      if not unicode then
+        unicode=first
+        glyph.unicode=unicode
+        first=first+1
+      end
+      local list=duplicates[unicode]
+      mapping[index]=unicode
+      if not list then
+        list={}
+        duplicates[unicode]=list
+      end
+      if last>=privateoffset then
+        local limit=privateoffset-1
+        report("format 13 from %C to %C pruned to %C",first,last,limit)
+        last=limit
+      end
+      for unicode=first,last do
+        list[unicode]=true
+      end
+      nofdone=nofdone+last-first+1
+    else
+      report("format 13 from %C to %C ignored",first,last)
+    end
+  end
+  return nofdone
+end
+formatreaders[14]=function(f,fontdata,offset)
+  if offset and offset~=0 then
+    setposition(f,offset)
+    local format=readushort(f)
+    local length=readulong(f)
+    local nofrecords=readulong(f)
+    local records={}
+    local variants={}
+    local nofdone=0
+    fontdata.variants=variants
+    for i=1,nofrecords do
+      records[i]={
+        selector=readuint(f),
+        default=readulong(f),
+        other=readulong(f),
+      }
+    end
+    for i=1,nofrecords do
+      local record=records[i]
+      local selector=record.selector
+      local default=record.default
+      local other=record.other
+      local other=record.other
+      if other~=0 then
+        setposition(f,offset+other)
+        local mapping={}
+        local count=readulong(f)
+        for i=1,count do
+          mapping[readuint(f)]=readushort(f)
+        end
+        nofdone=nofdone+count
+        variants[selector]=mapping
+      end
+    end
+    return nofdone
+  else
+    return 0
+  end
+end
+local function checkcmap(f,fontdata,records,platform,encoding,format)
+  local data=records[platform]
+  if not data then
+    return 0
+  end
+  data=data[encoding]
+  if not data then
+    return 0
+  end
+  data=data[format]
+  if not data then
+    return 0
+  end
+  local reader=formatreaders[format]
+  if not reader then
+    return 0
+  end
+  local p=platforms[platform]
+  local e=encodings[p]
+  local n=reader(f,fontdata,data) or 0
+  if trace_cmap then
+    report("cmap checked: platform %i (%s), encoding %i (%s), format %i, new unicodes %i",platform,p,encoding,e and e[encoding] or "?",format,n)
+  end
+  return n
+end
+function readers.cmap(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"cmap",specification.glyphs)
+  if tableoffset then
+    local version=readushort(f)
+    local noftables=readushort(f)
+    local records={}
+    local unicodecid=false
+    local variantcid=false
+    local variants={}
+    local duplicates=fontdata.duplicates or {}
+    fontdata.duplicates=duplicates
+    for i=1,noftables do
+      local platform=readushort(f)
+      local encoding=readushort(f)
+      local offset=readulong(f)
+      local record=records[platform]
+      if not record then
+        records[platform]={
+          [encoding]={
+            offsets={ offset },
+            formats={},
+          }
+        }
+      else
+        local subtables=record[encoding]
+        if not subtables then
+          record[encoding]={
+            offsets={ offset },
+            formats={},
+          }
+        else
+          local offsets=subtables.offsets
+          offsets[#offsets+1]=offset
+        end
+      end
+    end
+    if trace_cmap then
+      report("found cmaps:")
+    end
+    for platform,record in sortedhash(records) do
+      local p=platforms[platform]
+      local e=encodings[p]
+      local sp=supported[platform]
+      local ps=p or "?"
+      if trace_cmap then
+        if sp then
+          report("  platform %i: %s",platform,ps)
+        else
+          report("  platform %i: %s (unsupported)",platform,ps)
+        end
+      end
+      for encoding,subtables in sortedhash(record) do
+        local se=sp and sp[encoding]
+        local es=e and e[encoding] or "?"
+        if trace_cmap then
+          if se then
+            report("    encoding %i: %s",encoding,es)
+          else
+            report("    encoding %i: %s (unsupported)",encoding,es)
+          end
+        end
+        local offsets=subtables.offsets
+        local formats=subtables.formats
+        for i=1,#offsets do
+          local offset=tableoffset+offsets[i]
+          setposition(f,offset)
+          formats[readushort(f)]=offset
+        end
+        record[encoding]=formats
+        if trace_cmap then
+          local list=sortedkeys(formats)
+          for i=1,#list do
+            if not (se and se[list[i]]) then
+              list[i]=list[i].." (unsupported)"
+            end
+          end
+          report("      formats: % t",list)
+        end
+      end
+    end
+    local ok=false
+    for i=1,#sequence do
+      local si=sequence[i]
+      local sp,se,sf=si[1],si[2],si[3]
+      if checkcmap(f,fontdata,records,sp,se,sf)>0 then
+        ok=true
+      end
+    end
+    if not ok then
+      report("no useable unicode cmap found")
+    end
+    fontdata.cidmaps={
+      version=version,
+      noftables=noftables,
+      records=records,
+    }
+  else
+    fontdata.cidmaps={}
+  end
+end
+function readers.loca(f,fontdata,specification)
+  reportskippedtable(f,fontdata,"loca",specification.glyphs)
+end
+function readers.glyf(f,fontdata,specification) 
+  reportskippedtable(f,fontdata,"glyf",specification.glyphs)
+end
+function readers.colr(f,fontdata,specification)
+  reportskippedtable(f,fontdata,"colr",specification.glyphs)
+end
+function readers.cpal(f,fontdata,specification)
+  reportskippedtable(f,fontdata,"cpal",specification.glyphs)
+end
+function readers.svg(f,fontdata,specification)
+  reportskippedtable(f,fontdata,"svg",specification.glyphs)
+end
+function readers.sbix(f,fontdata,specification)
+  reportskippedtable(f,fontdata,"sbix",specification.glyphs)
+end
+function readers.cbdt(f,fontdata,specification)
+  reportskippedtable(f,fontdata,"cbdt",specification.glyphs)
+end
+function readers.cblc(f,fontdata,specification)
+  reportskippedtable(f,fontdata,"cblc",specification.glyphs)
+end
+function readers.ebdt(f,fontdata,specification)
+  reportskippedtable(f,fontdata,"ebdt",specification.glyphs)
+end
+function readers.ebsc(f,fontdata,specification)
+  reportskippedtable(f,fontdata,"ebsc",specification.glyphs)
+end
+function readers.eblc(f,fontdata,specification)
+  reportskippedtable(f,fontdata,"eblc",specification.glyphs)
+end
+function readers.kern(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"kern",specification.kerns)
+  if tableoffset then
+    local version=readushort(f)
+    local noftables=readushort(f)
+    for i=1,noftables do
+      local version=readushort(f)
+      local length=readushort(f)
+      local coverage=readushort(f)
+      local format=bit32.rshift(coverage,8) 
+      if format==0 then
+        local nofpairs=readushort(f)
+        local searchrange=readushort(f)
+        local entryselector=readushort(f)
+        local rangeshift=readushort(f)
+        local kerns={}
+        local glyphs=fontdata.glyphs
+        for i=1,nofpairs do
+          local left=readushort(f)
+          local right=readushort(f)
+          local kern=readfword(f)
+          local glyph=glyphs[left]
+          local kerns=glyph.kerns
+          if kerns then
+            kerns[right]=kern
+          else
+            glyph.kerns={ [right]=kern }
+          end
+        end
+      elseif format==2 then
+        report("todo: kern classes")
+      else
+        report("todo: kerns")
+      end
+    end
+  end
+end
+function readers.gdef(f,fontdata,specification)
+  reportskippedtable(f,fontdata,"gdef",specification.details)
+end
+function readers.gsub(f,fontdata,specification)
+  reportskippedtable(f,fontdata,"gsub",specification.details)
+end
+function readers.gpos(f,fontdata,specification)
+  reportskippedtable(f,fontdata,"gpos",specification.details)
+end
+function readers.math(f,fontdata,specification)
+  reportskippedtable(f,fontdata,"math",specification.details)
+end
+local function getinfo(maindata,sub,platformnames,rawfamilynames,metricstoo,instancenames)
+  local fontdata=sub and maindata.subfonts and maindata.subfonts[sub] or maindata
+  local names=fontdata.names
+  local info=nil
+  if names then
+    local metrics=fontdata.windowsmetrics or {}
+    local postscript=fontdata.postscript   or {}
+    local fontheader=fontdata.fontheader   or {}
+    local cffinfo=fontdata.cffinfo    or {}
+    local filename=fontdata.filename
+    local weight=getname(fontdata,"weight") or (cffinfo and cffinfo.weight) or (metrics and metrics.weight)
+    local width=getname(fontdata,"width") or (cffinfo and cffinfo.width ) or (metrics and metrics.width )
+    local fontname=getname(fontdata,"postscriptname")
+    local fullname=getname(fontdata,"fullname")
+    local family=getname(fontdata,"family")
+    local subfamily=getname(fontdata,"subfamily")
+    local familyname=getname(fontdata,"typographicfamily")
+    local subfamilyname=getname(fontdata,"typographicsubfamily")
+    local compatiblename=getname(fontdata,"compatiblefullname") 
+    if rawfamilynames then
+    else
+      if not  familyname then  familyname=family end
+      if not subfamilyname then subfamilyname=subfamily end
+    end
+    if platformnames then
+      platformnames=fontdata.platformnames
+    end
+    if instancenames then
+      local variabledata=fontdata.variabledata
+      if variabledata then
+        local instances=variabledata and variabledata.instances
+        if instances then
+          instancenames={}
+          for i=1,#instances do
+            instancenames[i]=lower(stripstring(instances[i].subfamily))
+          end
+        else
+          instancenames=nil
+        end
+      else
+        instancenames=nil
+      end
+    end
+    info={ 
+      subfontindex=fontdata.subfontindex or sub or 0,
+      version=getname(fontdata,"version"),
+      fontname=fontname,
+      fullname=fullname,
+      family=family,
+      subfamily=subfamily,
+      familyname=familyname,
+      subfamilyname=subfamilyname,
+      compatiblename=compatiblename,
+      weight=weight and lower(weight),
+      width=width and lower(width),
+      pfmweight=metrics.weightclass or 400,
+      pfmwidth=metrics.widthclass or 5,
+      panosewidth=metrics.panosewidth,
+      panoseweight=metrics.panoseweight,
+      italicangle=postscript.italicangle or 0,
+      units=fontheader.units or 0,
+      designsize=fontdata.designsize,
+      minsize=fontdata.minsize,
+      maxsize=fontdata.maxsize,
+      monospaced=(tonumber(postscript.monospaced or 0)>0) or metrics.panosewidth=="monospaced",
+      averagewidth=metrics.averagewidth,
+      xheight=metrics.xheight,
+      capheight=metrics.capheight,
+      ascender=metrics.typoascender,
+      descender=metrics.typodescender,
+      platformnames=platformnames or nil,
+      instancenames=instancenames or nil,
+    }
+    if metricstoo then
+      local keys={
+        "version",
+        "ascender","descender","linegap",
+        "maxadvancewidth","maxadvanceheight","maxextent",
+        "minbottomsidebearing","mintopsidebearing",
+      }
+      local h=fontdata.horizontalheader or {}
+      local v=fontdata.verticalheader  or {}
+      if h then
+        local th={}
+        local tv={}
+        for i=1,#keys do
+          local key=keys[i]
+          th[key]=h[key] or 0
+          tv[key]=v[key] or 0
+        end
+        info.horizontalmetrics=th
+        info.verticalmetrics=tv
+      end
+    end
+  elseif n then
+    info={
+      filename=fontdata.filename,
+      comment="there is no info for subfont "..n,
+    }
+  else
+    info={
+      filename=fontdata.filename,
+      comment="there is no info",
+    }
+  end
+  return info
+end
+local function loadtables(f,specification,offset)
+  if offset then
+    setposition(f,offset)
+  end
+  local tables={}
+  local basename=file.basename(specification.filename)
+  local filesize=specification.filesize
+  local filetime=specification.filetime
+  local fontdata={ 
+    filename=basename,
+    filesize=filesize,
+    filetime=filetime,
+    version=readstring(f,4),
+    noftables=readushort(f),
+    searchrange=readushort(f),
+    entryselector=readushort(f),
+    rangeshift=readushort(f),
+    tables=tables,
+    foundtables=false,
+  }
+  for i=1,fontdata.noftables do
+    local tag=lower(stripstring(readstring(f,4)))
+    local checksum=readulong(f) 
+    local offset=readulong(f)
+    local length=readulong(f)
+    if offset+length>filesize then
+      report("bad %a table in file %a",tag,basename)
+    end
+    tables[tag]={
+      checksum=checksum,
+      offset=offset,
+      length=length,
+    }
+  end
+  fontdata.foundtables=sortedkeys(tables)
+  if tables.cff or tables.cff2 then
+    fontdata.format="opentype"
+  else
+    fontdata.format="truetype"
+  end
+  return fontdata
+end
+local function prepareglyps(fontdata)
+  local glyphs=setmetatableindex(function(t,k)
+    local v={
+      index=k,
+    }
+    t[k]=v
+    return v
+  end)
+  fontdata.glyphs=glyphs
+  fontdata.mapping={}
+end
+local function readtable(tag,f,fontdata,specification,...)
+  local reader=readers[tag]
+  if reader then
+    reader(f,fontdata,specification,...)
+  end
+end
+local variablefonts_supported=(context and true) or (logs and logs.application and true) or false
+local function readdata(f,offset,specification)
+  local fontdata=loadtables(f,specification,offset)
+  if specification.glyphs then
+    prepareglyps(fontdata)
+  end
+  if not variablefonts_supported then
+    specification.instance=nil
+    specification.variable=nil
+    specification.factors=nil
+  end
+  fontdata.temporary={}
+  readtable("name",f,fontdata,specification)
+  local askedname=specification.askedname
+  if askedname then
+    local fullname=getname(fontdata,"fullname") or ""
+    local cleanname=gsub(askedname,"[^a-zA-Z0-9]","")
+    local foundname=gsub(fullname,"[^a-zA-Z0-9]","")
+    if lower(cleanname)~=lower(foundname) then
+      return 
+    end
+  end
+  readtable("stat",f,fontdata,specification)
+  readtable("avar",f,fontdata,specification)
+  readtable("fvar",f,fontdata,specification)
+  if variablefonts_supported then
+    local variabledata=fontdata.variabledata
+    if variabledata then
+      local instances=variabledata.instances
+      local axis=variabledata.axis
+      if axis and (not instances or #instances==0) then
+        instances={}
+        variabledata.instances=instances
+        local function add(n,subfamily,value)
+          local values={}
+          for i=1,#axis do
+            local a=axis[i]
+            values[i]={
+              axis=a.tag,
+              value=i==n and value or a.default,
+            }
+          end
+          instances[#instances+1]={
+            subfamily=subfamily,
+            values=values,
+          }
+        end
+        for i=1,#axis do
+          local a=axis[i]
+          local tag=a.tag
+          add(i,"default"..tag,a.default)
+          add(i,"minimum"..tag,a.minimum)
+          add(i,"maximum"..tag,a.maximum)
+        end
+      end
+    end
+    if not specification.factors then
+      local instance=specification.instance
+      if type(instance)=="string" then
+        local factors=helpers.getfactors(fontdata,instance)
+        if factors then
+          specification.factors=factors
+          fontdata.factors=factors
+          fontdata.instance=instance
+          report("user instance: %s, factors: % t",instance,factors)
+        else
+          report("user instance: %s, bad factors",instance)
+        end
+      end
+    end
+    if not fontdata.factors then
+      if fontdata.variabledata then
+        local factors=helpers.getfactors(fontdata,true)
+        if factors then
+          specification.factors=factors
+          fontdata.factors=factors
+          report("factors: % t",factors)
+        else
+          report("bad factors")
+        end
+      else
+      end
+    end
+  end
+  readtable("os/2",f,fontdata,specification)
+  readtable("head",f,fontdata,specification)
+  readtable("maxp",f,fontdata,specification)
+  readtable("hhea",f,fontdata,specification)
+  readtable("vhea",f,fontdata,specification)
+  readtable("hmtx",f,fontdata,specification)
+  readtable("vmtx",f,fontdata,specification)
+  readtable("vorg",f,fontdata,specification)
+  readtable("post",f,fontdata,specification)
+  readtable("mvar",f,fontdata,specification)
+  readtable("hvar",f,fontdata,specification)
+  readtable("vvar",f,fontdata,specification)
+  readtable("gdef",f,fontdata,specification)
+  readtable("cff",f,fontdata,specification)
+  readtable("cff2",f,fontdata,specification)
+  readtable("cmap",f,fontdata,specification)
+  readtable("loca",f,fontdata,specification) 
+  readtable("glyf",f,fontdata,specification) 
+  readtable("colr",f,fontdata,specification)
+  readtable("cpal",f,fontdata,specification)
+  readtable("svg",f,fontdata,specification)
+  readtable("sbix",f,fontdata,specification)
+  readtable("cbdt",f,fontdata,specification)
+  readtable("cblc",f,fontdata,specification)
+  readtable("ebdt",f,fontdata,specification)
+  readtable("eblc",f,fontdata,specification)
+  readtable("kern",f,fontdata,specification)
+  readtable("gsub",f,fontdata,specification)
+  readtable("gpos",f,fontdata,specification)
+  readtable("math",f,fontdata,specification)
+  fontdata.locations=nil
+  fontdata.tables=nil
+  fontdata.cidmaps=nil
+  fontdata.dictionaries=nil
+  return fontdata
+end
+local function loadfontdata(specification)
+  local filename=specification.filename
+  local fileattr=lfs.attributes(filename)
+  local filesize=fileattr and fileattr.size or 0
+  local filetime=fileattr and fileattr.modification or 0
+  local f=openfile(filename,true) 
+  if not f then
+    report("unable to open %a",filename)
+  elseif filesize==0 then
+    report("empty file %a",filename)
+    closefile(f)
+  else
+    specification.filesize=filesize
+    specification.filetime=filetime
+    local version=readstring(f,4)
+    local fontdata=nil
+    if version=="OTTO" or version=="true" or version=="\0\1\0\0" then
+      fontdata=readdata(f,0,specification)
+    elseif version=="ttcf" then
+      local subfont=tonumber(specification.subfont)
+      local offsets={}
+      local ttcversion=readulong(f)
+      local nofsubfonts=readulong(f)
+      for i=1,nofsubfonts do
+        offsets[i]=readulong(f)
+      end
+      if subfont then 
+        if subfont>=1 and subfont<=nofsubfonts then
+          fontdata=readdata(f,offsets[subfont],specification)
+        else
+          report("no subfont %a in file %a",subfont,filename)
+        end
+      else
+        subfont=specification.subfont
+        if type(subfont)=="string" and subfont~="" then
+          specification.askedname=subfont
+          for i=1,nofsubfonts do
+            fontdata=readdata(f,offsets[i],specification)
+            if fontdata then
+              fontdata.subfontindex=i
+              report("subfont named %a has index %a",subfont,i)
+              break
+            end
+          end
+          if not fontdata then
+            report("no subfont named %a",subfont)
+          end
+        else
+          local subfonts={}
+          fontdata={
+            filename=filename,
+            filesize=filesize,
+            filetime=filetime,
+            version=version,
+            subfonts=subfonts,
+            ttcversion=ttcversion,
+            nofsubfonts=nofsubfonts,
+          }
+          for i=1,nofsubfonts do
+            subfonts[i]=readdata(f,offsets[i],specification)
+          end
+        end
+      end
+    else
+      report("unknown version %a in file %a",version,filename)
+    end
+    closefile(f)
+    return fontdata or {}
+  end
+end
+local function loadfont(specification,n,instance)
+  if type(specification)=="string" then
+    specification={
+      filename=specification,
+      info=true,
+      details=true,
+      glyphs=true,
+      shapes=true,
+      kerns=true,
+      variable=true,
+      globalkerns=true,
+      lookups=true,
+      subfont=n or true,
+      tounicode=false,
+      instance=instance
+    }
+  end
+  if specification.shapes or specification.lookups or specification.kerns then
+    specification.glyphs=true
+  end
+  if specification.glyphs then
+    specification.details=true
+  end
+  if specification.details then
+    specification.info=true 
+  end
+  if specification.platformnames then
+    specification.platformnames=true 
+  end
+  if specification.instance or instance then
+    specification.variable=true
+    specification.instance=specification.instance or instance
+  end
+  local function message(str)
+    report("fatal error in file %a: %s\n%s",specification.filename,str,debug.traceback())
+  end
+  local ok,result=xpcall(loadfontdata,message,specification)
+  if ok then
+    return result
+  end
+end
+function readers.loadshapes(filename,n,instance,streams)
+  local fontdata=loadfont {
+    filename=filename,
+    shapes=true,
+    streams=streams,
+    variable=true,
+    subfont=n,
+    instance=instance,
+  }
+  if fontdata then
+    for k,v in next,fontdata.glyphs do
+      v.class=nil
+      v.index=nil
+      v.math=nil
+    end
+  end
+  return fontdata and {
+    filename=filename,
+    format=fontdata.format,
+    glyphs=fontdata.glyphs,
+    units=fontdata.fontheader.units,
+  } or {
+    filename=filename,
+    format="unknown",
+    glyphs={},
+    units=0,
+  }
+end
+function readers.loadfont(filename,n,instance)
+  local fontdata=loadfont {
+    filename=filename,
+    glyphs=true,
+    shapes=false,
+    lookups=true,
+    variable=true,
+    subfont=n,
+    instance=instance,
+  }
+  if fontdata then
+    return {
+      tableversion=tableversion,
+      creator="context mkiv",
+      size=fontdata.filesize,
+      time=fontdata.filetime,
+      glyphs=fontdata.glyphs,
+      descriptions=fontdata.descriptions,
+      format=fontdata.format,
+      goodies={},
+      metadata=getinfo(fontdata,n,false,false,true,true),
+      properties={
+        hasitalics=fontdata.hasitalics or false,
+        maxcolorclass=fontdata.maxcolorclass,
+        hascolor=fontdata.hascolor or false,
+        instance=fontdata.instance,
+        factors=fontdata.factors,
+      },
+      resources={
+        filename=filename,
+        private=privateoffset,
+        duplicates=fontdata.duplicates or {},
+        features=fontdata.features  or {},
+        sublookups=fontdata.sublookups or {},
+        marks=fontdata.marks    or {},
+        markclasses=fontdata.markclasses or {},
+        marksets=fontdata.marksets  or {},
+        sequences=fontdata.sequences  or {},
+        variants=fontdata.variants,
+        version=getname(fontdata,"version"),
+        cidinfo=fontdata.cidinfo,
+        mathconstants=fontdata.mathconstants,
+        colorpalettes=fontdata.colorpalettes,
+        svgshapes=fontdata.svgshapes,
+        sbixshapes=fontdata.sbixshapes,
+        variabledata=fontdata.variabledata,
+        foundtables=fontdata.foundtables,
+      },
+    }
+  end
+end
+function readers.getinfo(filename,specification)
+  local subfont=nil
+  local platformnames=false
+  local rawfamilynames=false
+  local instancenames=true
+  if type(specification)=="table" then
+    subfont=tonumber(specification.subfont)
+    platformnames=specification.platformnames
+    rawfamilynames=specification.rawfamilynames
+  else
+    subfont=tonumber(specification)
+  end
+  local fontdata=loadfont {
+    filename=filename,
+    details=true,
+    platformnames=platformnames,
+    instancenames=true,
+  }
+  if fontdata then
+    local subfonts=fontdata.subfonts
+    if not subfonts then
+      return getinfo(fontdata,nil,platformnames,rawfamilynames,false,instancenames)
+    elseif not subfont then
+      local info={}
+      for i=1,#subfonts do
+        info[i]=getinfo(fontdata,i,platformnames,rawfamilynames,false,instancenames)
+      end
+      return info
+    elseif subfont>=1 and subfont<=#subfonts then
+      return getinfo(fontdata,subfont,platformnames,rawfamilynames,false,instancenames)
+    else
+      return {
+        filename=filename,
+        comment="there is no subfont "..subfont.." in this file"
+      }
+    end
+  else
+    return {
+      filename=filename,
+      comment="the file cannot be opened for reading",
+    }
+  end
+end
+function readers.rehash(fontdata,hashmethod)
+  report("the %a helper is not yet implemented","rehash")
+end
+function readers.checkhash(fontdata)
+  report("the %a helper is not yet implemented","checkhash")
+end
+function readers.pack(fontdata,hashmethod)
+  report("the %a helper is not yet implemented","pack")
+end
+function readers.unpack(fontdata)
+  report("the %a helper is not yet implemented","unpack")
+end
+function readers.expand(fontdata)
+  report("the %a helper is not yet implemented","unpack")
+end
+function readers.compact(fontdata)
+  report("the %a helper is not yet implemented","compact")
+end
+local extenders={}
+function readers.registerextender(extender)
+  extenders[#extenders+1]=extender
+end
+function readers.extend(fontdata)
+  for i=1,#extenders do
+    local extender=extenders[i]
+    local name=extender.name or "unknown"
+    local action=extender.action
+    if action then
+      action(fontdata)
+    end
+  end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-cff']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local next,type,tonumber=next,type,tonumber
+local byte,char,gmatch=string.byte,string.char,string.gmatch
+local concat,remove=table.concat,table.remove
+local floor,abs,round,ceil,min,max=math.floor,math.abs,math.round,math.ceil,math.min,math.max
+local P,C,R,S,C,Cs,Ct=lpeg.P,lpeg.C,lpeg.R,lpeg.S,lpeg.C,lpeg.Cs,lpeg.Ct
+local lpegmatch=lpeg.match
+local formatters=string.formatters
+local bytetable=string.bytetable
+local readers=fonts.handlers.otf.readers
+local streamreader=readers.streamreader
+local readstring=streamreader.readstring
+local readbyte=streamreader.readcardinal1 
+local readushort=streamreader.readcardinal2 
+local readuint=streamreader.readcardinal3 
+local readulong=streamreader.readcardinal4 
+local setposition=streamreader.setposition
+local getposition=streamreader.getposition
+local readbytetable=streamreader.readbytetable
+local setmetatableindex=table.setmetatableindex
+local trace_charstrings=false trackers.register("fonts.cff.charstrings",function(v) trace_charstrings=v end)
+local report=logs.reporter("otf reader","cff")
+local parsedictionaries
+local parsecharstring
+local parsecharstrings
+local resetcharstrings
+local parseprivates
+local startparsing
+local stopparsing
+local defaultstrings={ [0]=
+  ".notdef","space","exclam","quotedbl","numbersign","dollar","percent",
+  "ampersand","quoteright","parenleft","parenright","asterisk","plus",
+  "comma","hyphen","period","slash","zero","one","two","three","four",
+  "five","six","seven","eight","nine","colon","semicolon","less",
+  "equal","greater","question","at","A","B","C","D","E","F","G","H",
+  "I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W",
+  "X","Y","Z","bracketleft","backslash","bracketright","asciicircum",
+  "underscore","quoteleft","a","b","c","d","e","f","g","h","i","j",
+  "k","l","m","n","o","p","q","r","s","t","u","v","w","x","y",
+  "z","braceleft","bar","braceright","asciitilde","exclamdown","cent",
+  "sterling","fraction","yen","florin","section","currency",
+  "quotesingle","quotedblleft","guillemotleft","guilsinglleft",
+  "guilsinglright","fi","fl","endash","dagger","daggerdbl",
+  "periodcentered","paragraph","bullet","quotesinglbase","quotedblbase",
+  "quotedblright","guillemotright","ellipsis","perthousand","questiondown",
+  "grave","acute","circumflex","tilde","macron","breve","dotaccent",
+  "dieresis","ring","cedilla","hungarumlaut","ogonek","caron","emdash",
+  "AE","ordfeminine","Lslash","Oslash","OE","ordmasculine","ae",
+  "dotlessi","lslash","oslash","oe","germandbls","onesuperior",
+  "logicalnot","mu","trademark","Eth","onehalf","plusminus","Thorn",
+  "onequarter","divide","brokenbar","degree","thorn","threequarters",
+  "twosuperior","registered","minus","eth","multiply","threesuperior",
+  "copyright","Aacute","Acircumflex","Adieresis","Agrave","Aring",
+  "Atilde","Ccedilla","Eacute","Ecircumflex","Edieresis","Egrave",
+  "Iacute","Icircumflex","Idieresis","Igrave","Ntilde","Oacute",
+  "Ocircumflex","Odieresis","Ograve","Otilde","Scaron","Uacute",
+  "Ucircumflex","Udieresis","Ugrave","Yacute","Ydieresis","Zcaron",
+  "aacute","acircumflex","adieresis","agrave","aring","atilde",
+  "ccedilla","eacute","ecircumflex","edieresis","egrave","iacute",
+  "icircumflex","idieresis","igrave","ntilde","oacute","ocircumflex",
+  "odieresis","ograve","otilde","scaron","uacute","ucircumflex",
+  "udieresis","ugrave","yacute","ydieresis","zcaron","exclamsmall",
+  "Hungarumlautsmall","dollaroldstyle","dollarsuperior","ampersandsmall",
+  "Acutesmall","parenleftsuperior","parenrightsuperior","twodotenleader",
+  "onedotenleader","zerooldstyle","oneoldstyle","twooldstyle",
+  "threeoldstyle","fouroldstyle","fiveoldstyle","sixoldstyle",
+  "sevenoldstyle","eightoldstyle","nineoldstyle","commasuperior",
+  "threequartersemdash","periodsuperior","questionsmall","asuperior",
+  "bsuperior","centsuperior","dsuperior","esuperior","isuperior",
+  "lsuperior","msuperior","nsuperior","osuperior","rsuperior","ssuperior",
+  "tsuperior","ff","ffi","ffl","parenleftinferior","parenrightinferior",
+  "Circumflexsmall","hyphensuperior","Gravesmall","Asmall","Bsmall",
+  "Csmall","Dsmall","Esmall","Fsmall","Gsmall","Hsmall","Ismall",
+  "Jsmall","Ksmall","Lsmall","Msmall","Nsmall","Osmall","Psmall",
+  "Qsmall","Rsmall","Ssmall","Tsmall","Usmall","Vsmall","Wsmall",
+  "Xsmall","Ysmall","Zsmall","colonmonetary","onefitted","rupiah",
+  "Tildesmall","exclamdownsmall","centoldstyle","Lslashsmall",
+  "Scaronsmall","Zcaronsmall","Dieresissmall","Brevesmall","Caronsmall",
+  "Dotaccentsmall","Macronsmall","figuredash","hypheninferior",
+  "Ogoneksmall","Ringsmall","Cedillasmall","questiondownsmall","oneeighth",
+  "threeeighths","fiveeighths","seveneighths","onethird","twothirds",
+  "zerosuperior","foursuperior","fivesuperior","sixsuperior",
+  "sevensuperior","eightsuperior","ninesuperior","zeroinferior",
+  "oneinferior","twoinferior","threeinferior","fourinferior",
+  "fiveinferior","sixinferior","seveninferior","eightinferior",
+  "nineinferior","centinferior","dollarinferior","periodinferior",
+  "commainferior","Agravesmall","Aacutesmall","Acircumflexsmall",
+  "Atildesmall","Adieresissmall","Aringsmall","AEsmall","Ccedillasmall",
+  "Egravesmall","Eacutesmall","Ecircumflexsmall","Edieresissmall",
+  "Igravesmall","Iacutesmall","Icircumflexsmall","Idieresissmall",
+  "Ethsmall","Ntildesmall","Ogravesmall","Oacutesmall","Ocircumflexsmall",
+  "Otildesmall","Odieresissmall","OEsmall","Oslashsmall","Ugravesmall",
+  "Uacutesmall","Ucircumflexsmall","Udieresissmall","Yacutesmall",
+  "Thornsmall","Ydieresissmall","001.000","001.001","001.002","001.003",
+  "Black","Bold","Book","Light","Medium","Regular","Roman","Semibold",
+}
+local cffreaders={
+  readbyte,
+  readushort,
+  readuint,
+  readulong,
+}
+local function readheader(f)
+  local offset=getposition(f)
+  local major=readbyte(f)
+  local header={
+    offset=offset,
+    major=major,
+    minor=readbyte(f),
+    size=readbyte(f),
+  }
+  if major==1 then
+    header.dsize=readbyte(f)  
+  elseif major==2 then
+    header.dsize=readushort(f) 
+  else
+  end
+  setposition(f,offset+header.size)
+  return header
+end
+local function readlengths(f,longcount)
+  local count=longcount and readulong(f) or readushort(f)
+  if count==0 then
+    return {}
+  end
+  local osize=readbyte(f)
+  local read=cffreaders[osize]
+  if not read then
+    report("bad offset size: %i",osize)
+    return {}
+  end
+  local lengths={}
+  local previous=read(f)
+  for i=1,count do
+    local offset=read(f)
+    local length=offset-previous
+    if length<0 then
+      report("bad offset: %i",length)
+      length=0
+    end
+    lengths[i]=length
+    previous=offset
+  end
+  return lengths
+end
+local function readfontnames(f)
+  local names=readlengths(f)
+  for i=1,#names do
+    names[i]=readstring(f,names[i])
+  end
+  return names
+end
+local function readtopdictionaries(f)
+  local dictionaries=readlengths(f)
+  for i=1,#dictionaries do
+    dictionaries[i]=readstring(f,dictionaries[i])
+  end
+  return dictionaries
+end
+local function readstrings(f)
+  local lengths=readlengths(f)
+  local strings=setmetatableindex({},defaultstrings)
+  local index=#defaultstrings
+  for i=1,#lengths do
+    index=index+1
+    strings[index]=readstring(f,lengths[i])
+  end
+  return strings
+end
+do
+  local stack={}
+  local top=0
+  local result={}
+  local strings={}
+  local p_single=P("\00")/function()
+      result.version=strings[stack[top]] or "unset"
+      top=0
+    end+P("\01")/function()
+      result.notice=strings[stack[top]] or "unset"
+      top=0
+    end+P("\02")/function()
+      result.fullname=strings[stack[top]] or "unset"
+      top=0
+    end+P("\03")/function()
+      result.familyname=strings[stack[top]] or "unset"
+      top=0
+    end+P("\04")/function()
+      result.weight=strings[stack[top]] or "unset"
+      top=0
+    end+P("\05")/function()
+      result.fontbbox={ unpack(stack,1,4) }
+      top=0
+    end
++P("\13")/function()
+      result.uniqueid=stack[top]
+      top=0
+    end+P("\14")/function()
+      result.xuid=concat(stack,"",1,top)
+      top=0
+    end+P("\15")/function()
+      result.charset=stack[top]
+      top=0
+    end+P("\16")/function()
+      result.encoding=stack[top]
+      top=0
+    end+P("\17")/function() 
+      result.charstrings=stack[top]
+      top=0
+    end+P("\18")/function()
+      result.private={
+        size=stack[top-1],
+        offset=stack[top],
+      }
+      top=0
+    end+P("\19")/function()
+      result.subroutines=stack[top]
+      top=0 
+    end+P("\20")/function()
+      result.defaultwidthx=stack[top]
+      top=0 
+    end+P("\21")/function()
+      result.nominalwidthx=stack[top]
+      top=0 
+    end
++P("\24")/function() 
+      result.vstore=stack[top]
+      top=0
+    end+P("\25")/function() 
+      result.maxstack=stack[top]
+      top=0
+    end
+  local p_double=P("\12")*(
+    P("\00")/function()
+      result.copyright=stack[top]
+      top=0
+    end+P("\01")/function()
+      result.monospaced=stack[top]==1 and true or false 
+      top=0
+    end+P("\02")/function()
+      result.italicangle=stack[top]
+      top=0
+    end+P("\03")/function()
+      result.underlineposition=stack[top]
+      top=0
+    end+P("\04")/function()
+      result.underlinethickness=stack[top]
+      top=0
+    end+P("\05")/function()
+      result.painttype=stack[top]
+      top=0
+    end+P("\06")/function()
+      result.charstringtype=stack[top]
+      top=0
+    end+P("\07")/function() 
+      result.fontmatrix={ unpack(stack,1,6) }
+      top=0
+    end+P("\08")/function()
+      result.strokewidth=stack[top]
+      top=0
+    end+P("\20")/function()
+      result.syntheticbase=stack[top]
+      top=0
+    end+P("\21")/function()
+      result.postscript=strings[stack[top]] or "unset"
+      top=0
+    end+P("\22")/function()
+      result.basefontname=strings[stack[top]] or "unset"
+      top=0
+    end+P("\21")/function()
+      result.basefontblend=stack[top]
+      top=0
+    end+P("\30")/function()
+      result.cid.registry=strings[stack[top-2]] or "unset"
+      result.cid.ordering=strings[stack[top-1]] or "unset"
+      result.cid.supplement=stack[top]
+      top=0
+    end+P("\31")/function()
+      result.cid.fontversion=stack[top]
+      top=0
+    end+P("\32")/function()
+      result.cid.fontrevision=stack[top]
+      top=0
+    end+P("\33")/function()
+      result.cid.fonttype=stack[top]
+      top=0
+    end+P("\34")/function()
+      result.cid.count=stack[top]
+      top=0
+    end+P("\35")/function()
+      result.cid.uidbase=stack[top]
+      top=0
+    end+P("\36")/function() 
+      result.cid.fdarray=stack[top]
+      top=0
+    end+P("\37")/function() 
+      result.cid.fdselect=stack[top]
+      top=0
+    end+P("\38")/function()
+      result.cid.fontname=strings[stack[top]] or "unset"
+      top=0
+    end
+  )
+  local p_last=P("\x0F")/"0"+P("\x1F")/"1"+P("\x2F")/"2"+P("\x3F")/"3"+P("\x4F")/"4"+P("\x5F")/"5"+P("\x6F")/"6"+P("\x7F")/"7"+P("\x8F")/"8"+P("\x9F")/"9"+P("\xAF")/""+P("\xBF")/""+P("\xCF")/""+P("\xDF")/""+P("\xEF")/""+R("\xF0\xFF")/""
+  local remap={
+    ["\x00"]="00",["\x01"]="01",["\x02"]="02",["\x03"]="03",["\x04"]="04",["\x05"]="05",["\x06"]="06",["\x07"]="07",["\x08"]="08",["\x09"]="09",["\x0A"]="0.",["\x0B"]="0E",["\x0C"]="0E-",["\x0D"]="0",["\x0E"]="0-",["\x0F"]="0",
+    ["\x10"]="10",["\x11"]="11",["\x12"]="12",["\x13"]="13",["\x14"]="14",["\x15"]="15",["\x16"]="16",["\x17"]="17",["\x18"]="18",["\x19"]="19",["\x1A"]="0.",["\x1B"]="0E",["\x1C"]="0E-",["\x1D"]="0",["\x1E"]="0-",["\x1F"]="0",
+    ["\x20"]="20",["\x21"]="21",["\x22"]="22",["\x23"]="23",["\x24"]="24",["\x25"]="25",["\x26"]="26",["\x27"]="27",["\x28"]="28",["\x29"]="29",["\x2A"]="0.",["\x2B"]="0E",["\x2C"]="0E-",["\x2D"]="0",["\x2E"]="0-",["\x2F"]="0",
+    ["\x30"]="30",["\x31"]="31",["\x32"]="32",["\x33"]="33",["\x34"]="34",["\x35"]="35",["\x36"]="36",["\x37"]="37",["\x38"]="38",["\x39"]="39",["\x3A"]="0.",["\x3B"]="0E",["\x3C"]="0E-",["\x3D"]="0",["\x3E"]="0-",["\x3F"]="0",
+    ["\x40"]="40",["\x41"]="41",["\x42"]="42",["\x43"]="43",["\x44"]="44",["\x45"]="45",["\x46"]="46",["\x47"]="47",["\x48"]="48",["\x49"]="49",["\x4A"]="0.",["\x4B"]="0E",["\x4C"]="0E-",["\x4D"]="0",["\x4E"]="0-",["\x4F"]="0",
+    ["\x50"]="50",["\x51"]="51",["\x52"]="52",["\x53"]="53",["\x54"]="54",["\x55"]="55",["\x56"]="56",["\x57"]="57",["\x58"]="58",["\x59"]="59",["\x5A"]="0.",["\x5B"]="0E",["\x5C"]="0E-",["\x5D"]="0",["\x5E"]="0-",["\x5F"]="0",
+    ["\x60"]="60",["\x61"]="61",["\x62"]="62",["\x63"]="63",["\x64"]="64",["\x65"]="65",["\x66"]="66",["\x67"]="67",["\x68"]="68",["\x69"]="69",["\x6A"]="0.",["\x6B"]="0E",["\x6C"]="0E-",["\x6D"]="0",["\x6E"]="0-",["\x6F"]="0",
+    ["\x70"]="70",["\x71"]="71",["\x72"]="72",["\x73"]="73",["\x74"]="74",["\x75"]="75",["\x76"]="76",["\x77"]="77",["\x78"]="78",["\x79"]="79",["\x7A"]="0.",["\x7B"]="0E",["\x7C"]="0E-",["\x7D"]="0",["\x7E"]="0-",["\x7F"]="0",
+    ["\x80"]="80",["\x81"]="81",["\x82"]="82",["\x83"]="83",["\x84"]="84",["\x85"]="85",["\x86"]="86",["\x87"]="87",["\x88"]="88",["\x89"]="89",["\x8A"]="0.",["\x8B"]="0E",["\x8C"]="0E-",["\x8D"]="0",["\x8E"]="0-",["\x8F"]="0",
+    ["\x90"]="90",["\x91"]="91",["\x92"]="92",["\x93"]="93",["\x94"]="94",["\x95"]="95",["\x96"]="96",["\x97"]="97",["\x98"]="98",["\x99"]="99",["\x9A"]="0.",["\x9B"]="0E",["\x9C"]="0E-",["\x9D"]="0",["\x9E"]="0-",["\x9F"]="0",
+    ["\xA0"]=".0",["\xA1"]=".1",["\xA2"]=".2",["\xA3"]=".3",["\xA4"]=".4",["\xA5"]=".5",["\xA6"]=".6",["\xA7"]=".7",["\xA8"]=".8",["\xA9"]=".9",["\xAA"]="..",["\xAB"]=".E",["\xAC"]=".E-",["\xAD"]=".",["\xAE"]=".-",["\xAF"]=".",
+    ["\xB0"]="E0",["\xB1"]="E1",["\xB2"]="E2",["\xB3"]="E3",["\xB4"]="E4",["\xB5"]="E5",["\xB6"]="E6",["\xB7"]="E7",["\xB8"]="E8",["\xB9"]="E9",["\xBA"]="E.",["\xBB"]="EE",["\xBC"]="EE-",["\xBD"]="E",["\xBE"]="E-",["\xBF"]="E",
+    ["\xC0"]="E-0",["\xC1"]="E-1",["\xC2"]="E-2",["\xC3"]="E-3",["\xC4"]="E-4",["\xC5"]="E-5",["\xC6"]="E-6",["\xC7"]="E-7",["\xC8"]="E-8",["\xC9"]="E-9",["\xCA"]="E-.",["\xCB"]="E-E",["\xCC"]="E-E-",["\xCD"]="E-",["\xCE"]="E--",["\xCF"]="E-",
+    ["\xD0"]="-0",["\xD1"]="-1",["\xD2"]="-2",["\xD3"]="-3",["\xD4"]="-4",["\xD5"]="-5",["\xD6"]="-6",["\xD7"]="-7",["\xD8"]="-8",["\xD9"]="-9",["\xDA"]="-.",["\xDB"]="-E",["\xDC"]="-E-",["\xDD"]="-",["\xDE"]="--",["\xDF"]="-",
+  }
+  local p_nibbles=P("\30")*Cs(((1-p_last)/remap)^0+p_last)/function(n)
+    top=top+1
+    stack[top]=tonumber(n) or 0
+  end
+  local p_byte=C(R("\32\246"))/function(b0)
+    top=top+1
+    stack[top]=byte(b0)-139
+  end
+  local p_positive=C(R("\247\250"))*C(1)/function(b0,b1)
+    top=top+1
+    stack[top]=(byte(b0)-247)*256+byte(b1)+108
+  end
+  local p_negative=C(R("\251\254"))*C(1)/function(b0,b1)
+    top=top+1
+    stack[top]=-(byte(b0)-251)*256-byte(b1)-108
+  end
+  local p_short=P("\28")*C(1)*C(1)/function(b1,b2)
+    top=top+1
+    local n=0x100*byte(b1)+byte(b2)
+    if n>=0x8000 then
+      stack[top]=n-0xFFFF-1
+    else
+      stack[top]=n
+    end
+  end
+  local p_long=P("\29")*C(1)*C(1)*C(1)*C(1)/function(b1,b2,b3,b4)
+    top=top+1
+    local n=0x1000000*byte(b1)+0x10000*byte(b2)+0x100*byte(b3)+byte(b4)
+    if n>=0x8000000 then
+      stack[top]=n-0xFFFFFFFF-1
+    else
+      stack[top]=n
+    end
+  end
+  local p_unsupported=P(1)/function(detail)
+    top=0
+  end
+  local p_dictionary=(
+    p_byte+p_positive+p_negative+p_short+p_long+p_nibbles+p_single+p_double+p_unsupported
+  )^1
+  parsedictionaries=function(data,dictionaries,what)
+    stack={}
+    strings=data.strings
+    for i=1,#dictionaries do
+      top=0
+      result=what=="cff" and {
+        monospaced=false,
+        italicangle=0,
+        underlineposition=-100,
+        underlinethickness=50,
+        painttype=0,
+        charstringtype=2,
+        fontmatrix={ 0.001,0,0,0.001,0,0 },
+        fontbbox={ 0,0,0,0 },
+        strokewidth=0,
+        charset=0,
+        encoding=0,
+        cid={
+          fontversion=0,
+          fontrevision=0,
+          fonttype=0,
+          count=8720,
+        }
+      } or {
+        charstringtype=2,
+        charset=0,
+        vstore=0,
+        cid={
+        },
+      }
+      lpegmatch(p_dictionary,dictionaries[i])
+      dictionaries[i]=result
+    end
+    result={}
+    top=0
+    stack={}
+  end
+  parseprivates=function(data,dictionaries)
+    stack={}
+    strings=data.strings
+    for i=1,#dictionaries do
+      local private=dictionaries[i].private
+      if private and private.data then
+        top=0
+        result={
+          forcebold=false,
+          languagegroup=0,
+          expansionfactor=0.06,
+          initialrandomseed=0,
+          subroutines=0,
+          defaultwidthx=0,
+          nominalwidthx=0,
+          cid={
+          },
+        }
+        lpegmatch(p_dictionary,private.data)
+        private.data=result
+      end
+    end
+    result={}
+    top=0
+    stack={}
+  end
+  local x=0
+  local y=0
+  local width=false
+  local r=0
+  local stems=0
+  local globalbias=0
+  local localbias=0
+  local nominalwidth=0
+  local defaultwidth=0
+  local charset=false
+  local globals=false
+  local locals=false
+  local depth=1
+  local xmin=0
+  local xmax=0
+  local ymin=0
+  local ymax=0
+  local checked=false
+  local keepcurve=false
+  local version=2
+  local regions=false
+  local nofregions=0
+  local region=false
+  local factors=false
+  local axis=false
+  local vsindex=0
+  local function showstate(where)
+    report("%w%-10s : [%s] n=%i",depth*2,where,concat(stack," ",1,top),top)
+  end
+  local function showvalue(where,value,showstack)
+    if showstack then
+      report("%w%-10s : %s : [%s] n=%i",depth*2,where,tostring(value),concat(stack," ",1,top),top)
+    else
+      report("%w%-10s : %s",depth*2,where,tostring(value))
+    end
+  end
+  local function xymoveto()
+    if keepcurve then
+      r=r+1
+      result[r]={ x,y,"m" }
+    end
+    if checked then
+      if x>xmax then xmax=x elseif x<xmin then xmin=x end
+      if y>ymax then ymax=y elseif y<ymin then ymin=y end
+    else
+      xmin=x
+      ymin=y
+      xmax=x
+      ymax=y
+      checked=true
+    end
+  end
+  local function xmoveto() 
+    if keepcurve then
+      r=r+1
+      result[r]={ x,y,"m" }
+    end
+    if not checked then
+      xmin=x
+      ymin=y
+      xmax=x
+      ymax=y
+      checked=true
+    elseif x>xmax then
+      xmax=x
+    elseif x<xmin then
+      xmin=x
+    end
+  end
+  local function ymoveto() 
+    if keepcurve then
+      r=r+1
+      result[r]={ x,y,"m" }
+    end
+    if not checked then
+      xmin=x
+      ymin=y
+      xmax=x
+      ymax=y
+      checked=true
+    elseif y>ymax then
+      ymax=y
+    elseif y<ymin then
+      ymin=y
+    end
+  end
+  local function moveto()
+    if trace_charstrings then
+      showstate("moveto")
+    end
+    top=0 
+    xymoveto()
+  end
+  local function xylineto() 
+    if keepcurve then
+      r=r+1
+      result[r]={ x,y,"l" }
+    end
+    if checked then
+      if x>xmax then xmax=x elseif x<xmin then xmin=x end
+      if y>ymax then ymax=y elseif y<ymin then ymin=y end
+    else
+      xmin=x
+      ymin=y
+      xmax=x
+      ymax=y
+      checked=true
+    end
+  end
+  local function xlineto() 
+    if keepcurve then
+      r=r+1
+      result[r]={ x,y,"l" }
+    end
+    if not checked then
+      xmin=x
+      ymin=y
+      xmax=x
+      ymax=y
+      checked=true
+    elseif x>xmax then
+      xmax=x
+    elseif x<xmin then
+      xmin=x
+    end
+  end
+  local function ylineto() 
+    if keepcurve then
+      r=r+1
+      result[r]={ x,y,"l" }
+    end
+    if not checked then
+      xmin=x
+      ymin=y
+      xmax=x
+      ymax=y
+      checked=true
+    elseif y>ymax then
+      ymax=y
+    elseif y<ymin then
+      ymin=y
+    end
+  end
+  local function xycurveto(x1,y1,x2,y2,x3,y3) 
+    if trace_charstrings then
+      showstate("curveto")
+    end
+    if keepcurve then
+      r=r+1
+      result[r]={ x1,y1,x2,y2,x3,y3,"c" }
+    end
+    if checked then
+      if x1>xmax then xmax=x1 elseif x1<xmin then xmin=x1 end
+      if y1>ymax then ymax=y1 elseif y1<ymin then ymin=y1 end
+    else
+      xmin=x1
+      ymin=y1
+      xmax=x1
+      ymax=y1
+      checked=true
+    end
+    if x2>xmax then xmax=x2 elseif x2<xmin then xmin=x2 end
+    if y2>ymax then ymax=y2 elseif y2<ymin then ymin=y2 end
+    if x3>xmax then xmax=x3 elseif x3<xmin then xmin=x3 end
+    if y3>ymax then ymax=y3 elseif y3<ymin then ymin=y3 end
+  end
+  local function rmoveto()
+    if not width then
+      if top>2 then
+        width=stack[1]
+        if trace_charstrings then
+          showvalue("backtrack width",width)
+        end
+      else
+        width=true
+      end
+    end
+    if trace_charstrings then
+      showstate("rmoveto")
+    end
+    x=x+stack[top-1] 
+    y=y+stack[top]  
+    top=0
+    xymoveto()
+  end
+  local function hmoveto()
+    if not width then
+      if top>1 then
+        width=stack[1]
+        if trace_charstrings then
+          showvalue("backtrack width",width)
+        end
+      else
+        width=true
+      end
+    end
+    if trace_charstrings then
+      showstate("hmoveto")
+    end
+    x=x+stack[top] 
+    top=0
+    xmoveto()
+  end
+  local function vmoveto()
+    if not width then
+      if top>1 then
+        width=stack[1]
+        if trace_charstrings then
+          showvalue("backtrack width",width)
+        end
+      else
+        width=true
+      end
+    end
+    if trace_charstrings then
+      showstate("vmoveto")
+    end
+    y=y+stack[top] 
+    top=0
+    ymoveto()
+  end
+  local function rlineto()
+    if trace_charstrings then
+      showstate("rlineto")
+    end
+    for i=1,top,2 do
+      x=x+stack[i]  
+      y=y+stack[i+1] 
+      xylineto()
+    end
+    top=0
+  end
+  local function hlineto() 
+    if trace_charstrings then
+      showstate("hlineto")
+    end
+    if top==1 then
+      x=x+stack[1]
+      xlineto()
+    else
+      local swap=true
+      for i=1,top do
+        if swap then
+          x=x+stack[i]
+          xlineto()
+          swap=false
+        else
+          y=y+stack[i]
+          ylineto()
+          swap=true
+        end
+      end
+    end
+    top=0
+  end
+  local function vlineto() 
+    if trace_charstrings then
+      showstate("vlineto")
+    end
+    if top==1 then
+      y=y+stack[1]
+      ylineto()
+    else
+      local swap=false
+      for i=1,top do
+        if swap then
+          x=x+stack[i]
+          xlineto()
+          swap=false
+        else
+          y=y+stack[i]
+          ylineto()
+          swap=true
+        end
+      end
+    end
+    top=0
+  end
+  local function rrcurveto()
+    if trace_charstrings then
+      showstate("rrcurveto")
+    end
+    for i=1,top,6 do
+      local ax=x+stack[i]  
+      local ay=y+stack[i+1] 
+      local bx=ax+stack[i+2] 
+      local by=ay+stack[i+3] 
+      x=bx+stack[i+4]    
+      y=by+stack[i+5]    
+      xycurveto(ax,ay,bx,by,x,y)
+    end
+    top=0
+  end
+  local function hhcurveto()
+    if trace_charstrings then
+      showstate("hhcurveto")
+    end
+    local s=1
+    if top%2~=0 then
+      y=y+stack[1]      
+      s=2
+    end
+    for i=s,top,4 do
+      local ax=x+stack[i]  
+      local ay=y
+      local bx=ax+stack[i+1] 
+      local by=ay+stack[i+2] 
+      x=bx+stack[i+3]    
+      y=by
+      xycurveto(ax,ay,bx,by,x,y)
+    end
+    top=0
+  end
+  local function vvcurveto()
+    if trace_charstrings then
+      showstate("vvcurveto")
+    end
+    local s=1
+    local d=0
+    if top%2~=0 then
+      d=stack[1]        
+      s=2
+    end
+    for i=s,top,4 do
+      local ax=x+d
+      local ay=y+stack[i]  
+      local bx=ax+stack[i+1] 
+      local by=ay+stack[i+2] 
+      x=bx
+      y=by+stack[i+3]    
+      xycurveto(ax,ay,bx,by,x,y)
+      d=0
+    end
+    top=0
+  end
+  local function xxcurveto(swap)
+    local last=top%4~=0 and stack[top]
+    if last then
+      top=top-1
+    end
+    for i=1,top,4 do
+      local ax,ay,bx,by
+      if swap then
+        ax=x+stack[i]
+        ay=y
+        bx=ax+stack[i+1]
+        by=ay+stack[i+2]
+        y=by+stack[i+3]
+        if last and i+3==top then
+          x=bx+last
+        else
+          x=bx
+        end
+        swap=false
+      else
+        ax=x
+        ay=y+stack[i]
+        bx=ax+stack[i+1]
+        by=ay+stack[i+2]
+        x=bx+stack[i+3]
+        if last and i+3==top then
+          y=by+last
+        else
+          y=by
+        end
+        swap=true
+      end
+      xycurveto(ax,ay,bx,by,x,y)
+    end
+    top=0
+  end
+  local function hvcurveto()
+    if trace_charstrings then
+      showstate("hvcurveto")
+    end
+    xxcurveto(true)
+  end
+  local function vhcurveto()
+    if trace_charstrings then
+      showstate("vhcurveto")
+    end
+    xxcurveto(false)
+  end
+  local function rcurveline()
+    if trace_charstrings then
+      showstate("rcurveline")
+    end
+    for i=1,top-2,6 do
+      local ax=x+stack[i]  
+      local ay=y+stack[i+1] 
+      local bx=ax+stack[i+2] 
+      local by=ay+stack[i+3] 
+      x=bx+stack[i+4] 
+      y=by+stack[i+5] 
+      xycurveto(ax,ay,bx,by,x,y)
+    end
+    x=x+stack[top-1] 
+    y=y+stack[top]  
+    xylineto()
+    top=0
+  end
+  local function rlinecurve()
+    if trace_charstrings then
+      showstate("rlinecurve")
+    end
+    if top>6 then
+      for i=1,top-6,2 do
+        x=x+stack[i]
+        y=y+stack[i+1]
+        xylineto()
+      end
+    end
+    local ax=x+stack[top-5]
+    local ay=y+stack[top-4]
+    local bx=ax+stack[top-3]
+    local by=ay+stack[top-2]
+    x=bx+stack[top-1]
+    y=by+stack[top]
+    xycurveto(ax,ay,bx,by,x,y)
+    top=0
+  end
+  local function flex() 
+    if trace_charstrings then
+      showstate("flex")
+    end
+    local ax=x+stack[1] 
+    local ay=y+stack[2] 
+    local bx=ax+stack[3] 
+    local by=ay+stack[4] 
+    local cx=bx+stack[5] 
+    local cy=by+stack[6] 
+    xycurveto(ax,ay,bx,by,cx,cy)
+    local dx=cx+stack[7] 
+    local dy=cy+stack[8] 
+    local ex=dx+stack[9] 
+    local ey=dy+stack[10] 
+    x=ex+stack[11]    
+    y=ey+stack[12]    
+    xycurveto(dx,dy,ex,ey,x,y)
+    top=0
+  end
+  local function hflex()
+    if trace_charstrings then
+      showstate("hflex")
+    end
+    local ax=x+stack[1] 
+    local ay=y
+    local bx=ax+stack[2] 
+    local by=ay+stack[3] 
+    local cx=bx+stack[4] 
+    local cy=by
+    xycurveto(ax,ay,bx,by,cx,cy)
+    local dx=cx+stack[5] 
+    local dy=by
+    local ex=dx+stack[6] 
+    local ey=y
+    x=ex+stack[7]    
+    xycurveto(dx,dy,ex,ey,x,y)
+    top=0
+  end
+  local function hflex1()
+    if trace_charstrings then
+      showstate("hflex1")
+    end
+    local ax=x+stack[1] 
+    local ay=y+stack[2] 
+    local bx=ax+stack[3] 
+    local by=ay+stack[4] 
+    local cx=bx+stack[5] 
+    local cy=by
+    xycurveto(ax,ay,bx,by,cx,cy)
+    local dx=cx+stack[6] 
+    local dy=by
+    local ex=dx+stack[7] 
+    local ey=dy+stack[8] 
+    x=ex+stack[9]    
+    xycurveto(dx,dy,ex,ey,x,y)
+    top=0
+  end
+  local function flex1()
+    if trace_charstrings then
+      showstate("flex1")
+    end
+    local ax=x+stack[1] 
+    local ay=y+stack[2] 
+    local bx=ax+stack[3] 
+    local by=ay+stack[4] 
+    local cx=bx+stack[5] 
+    local cy=by+stack[6] 
+    xycurveto(ax,ay,bx,by,cx,cy)
+    local dx=cx+stack[7] 
+    local dy=cy+stack[8] 
+    local ex=dx+stack[9] 
+    local ey=dy+stack[10] 
+    if abs(ex-x)>abs(ey-y) then 
+      x=ex+stack[11]
+    else
+      y=ey+stack[11]
+    end
+    xycurveto(dx,dy,ex,ey,x,y)
+    top=0
+  end
+  local function getstem()
+    if top==0 then
+    elseif top%2~=0 then
+      if width then
+        remove(stack,1)
+      else
+        width=remove(stack,1)
+        if trace_charstrings then
+          showvalue("width",width)
+        end
+      end
+      top=top-1
+    end
+    if trace_charstrings then
+      showstate("stem")
+    end
+    stems=stems+top/2
+    top=0
+  end
+  local function getmask()
+    if top==0 then
+    elseif top%2~=0 then
+      if width then
+        remove(stack,1)
+      else
+        width=remove(stack,1)
+        if trace_charstrings then
+          showvalue("width",width)
+        end
+      end
+      top=top-1
+    end
+    if trace_charstrings then
+      showstate(operator==19 and "hintmark" or "cntrmask")
+    end
+    stems=stems+top/2
+    top=0
+    if stems==0 then
+    elseif stems<=8 then
+      return 1
+    else
+      return floor((stems+7)/8)
+    end
+  end
+  local function unsupported(t)
+    if trace_charstrings then
+      showstate("unsupported "..t)
+    end
+    top=0
+  end
+  local function unsupportedsub(t)
+    if trace_charstrings then
+      showstate("unsupported sub "..t)
+    end
+    top=0
+  end
+  local function getstem3()
+    if trace_charstrings then
+      showstate("stem3")
+    end
+    top=0
+  end
+  local function divide()
+    if version==1 then
+      local d=stack[top]
+      top=top-1
+      stack[top]=stack[top]/d
+    end
+  end
+  local function closepath()
+    if version==1 then
+      if trace_charstrings then
+        showstate("closepath")
+      end
+    end
+    top=0
+  end
+  local function hsbw()
+    if version==1 then
+      if trace_charstrings then
+        showstate("dotsection")
+      end
+      width=stack[top]
+    end
+    top=0
+  end
+  local function seac()
+    if version==1 then
+      if trace_charstrings then
+        showstate("seac")
+      end
+    end
+    top=0
+  end
+  local function sbw()
+    if version==1 then
+      if trace_charstrings then
+        showstate("sbw")
+      end
+      width=stack[top-1]
+    end
+    top=0
+  end
+  local function callothersubr()
+    if version==1 then
+      if trace_charstrings then
+        showstate("callothersubr (unsupported)")
+      end
+    end
+    top=0
+  end
+  local function pop()
+    if version==1 then
+      if trace_charstrings then
+        showstate("pop (unsupported)")
+      end
+      top=top+1
+      stack[top]=0 
+    else
+      top=0
+    end
+  end
+  local function setcurrentpoint()
+    if version==1 then
+      if trace_charstrings then
+        showstate("pop (unsupported)")
+      end
+      x=x+stack[top-1]
+      y=y+stack[top]
+    end
+    top=0
+  end
+  local reginit=false
+  local function updateregions(n) 
+    if regions then
+      local current=regions[n] or regions[1]
+      nofregions=#current
+      if axis and n~=reginit then
+        factors={}
+        for i=1,nofregions do
+          local region=current[i]
+          local s=1
+          for j=1,#axis do
+            local f=axis[j]
+            local r=region[j]
+            local start=r.start
+            local peak=r.peak
+            local stop=r.stop
+            if start>peak or peak>stop then
+            elseif start<0 and stop>0 and peak~=0 then
+            elseif peak==0 then
+            elseif f<start or f>stop then
+              s=0
+              break
+            elseif f<peak then
+              s=s*(f-start)/(peak-start)
+            elseif f>peak then
+              s=s*(stop-f)/(stop-peak)
+            else
+            end
+          end
+          factors[i]=s
+        end
+      end
+    end
+    reginit=n
+  end
+  local function setvsindex()
+    local vsindex=stack[top]
+    if trace_charstrings then
+      showstate(formatters["vsindex %i"](vsindex))
+    end
+    updateregions(vsindex)
+    top=top-1
+  end
+  local function blend()
+    local n=stack[top]
+    top=top-1
+    if axis then
+      if trace_charstrings then
+        local t=top-nofregions*n
+        local m=t-n
+        for i=1,n do
+          local k=m+i
+          local d=m+n+(i-1)*nofregions
+          local old=stack[k]
+          local new=old
+          for r=1,nofregions do
+            new=new+stack[d+r]*factors[r]
+          end
+          stack[k]=new
+          showstate(formatters["blend %i of %i: %s -> %s"](i,n,old,new))
+        end
+        top=t
+      elseif n==1 then
+        top=top-nofregions
+        local v=stack[top]
+        for r=1,nofregions do
+          v=v+stack[top+r]*factors[r]
+        end
+        stack[top]=v
+      else
+        top=top-nofregions*n
+        local d=top
+        local k=top-n
+        for i=1,n do
+          k=k+1
+          local v=stack[k]
+          for r=1,nofregions do
+            v=v+stack[d+r]*factors[r]
+          end
+          stack[k]=v
+          d=d+nofregions
+        end
+      end
+    else
+    end
+  end
+  local actions={ [0]=unsupported,
+    getstem,
+    unsupported,
+    getstem,
+    vmoveto,
+    rlineto,
+    hlineto,
+    vlineto,
+    rrcurveto,
+    unsupported,
+    unsupported,
+    unsupported,
+    unsupported,
+    hsbw,
+    unsupported,
+    setvsindex,
+    blend,
+    unsupported,
+    getstem,
+    getmask,
+    getmask,
+    rmoveto,
+    hmoveto,
+    getstem,
+    rcurveline,
+    rlinecurve,
+    vvcurveto,
+    hhcurveto,
+    unsupported,
+    unsupported,
+    vhcurveto,
+    hvcurveto,
+  }
+  local subactions={
+    [000]=dotsection,
+    [001]=getstem3,
+    [002]=getstem3,
+    [006]=seac,
+    [007]=sbw,
+    [012]=divide,
+    [016]=callothersubr,
+    [017]=pop,
+    [033]=setcurrentpoint,
+    [034]=hflex,
+    [035]=flex,
+    [036]=hflex1,
+    [037]=flex1,
+  }
+  local c_endchar=char(14)
+  local passon do
+    local rshift=bit32.rshift
+    local band=bit32.band
+    local round=math.round
+    local encode=table.setmetatableindex(function(t,i)
+      for i=-2048,-1130 do
+        t[i]=char(28,band(rshift(i,8),0xFF),band(i,0xFF))
+      end
+      for i=-1131,-108 do
+        local v=0xFB00-i-108
+        t[i]=char(band(rshift(v,8),0xFF),band(v,0xFF))
+      end
+      for i=-107,107 do
+        t[i]=char(i+139)
+      end
+      for i=108,1131 do
+        local v=0xF700+i-108
+        t[i]=char(band(rshift(v,8),0xFF),band(v,0xFF))
+      end
+      for i=1132,2048 do
+        t[i]=char(28,band(rshift(i,8),0xFF),band(i,0xFF))
+      end
+      return t[i]
+    end)
+    local function setvsindex()
+      local vsindex=stack[top]
+      updateregions(vsindex)
+      top=top-1
+    end
+    local function blend()
+      local n=stack[top]
+      top=top-1
+      if not axis then
+      elseif n==1 then
+        top=top-nofregions
+        local v=stack[top]
+        for r=1,nofregions do
+          v=v+stack[top+r]*factors[r]
+        end
+        stack[top]=round(v)
+      else
+        top=top-nofregions*n
+        local d=top
+        local k=top-n
+        for i=1,n do
+          k=k+1
+          local v=stack[k]
+          for r=1,nofregions do
+            v=v+stack[d+r]*factors[r]
+          end
+          stack[k]=round(v)
+          d=d+nofregions
+        end
+      end
+    end
+    passon=function(operation)
+      if operation==15 then
+        setvsindex()
+      elseif operation==16 then
+        blend()
+      else
+        for i=1,top do
+          r=r+1
+          result[r]=encode[stack[i]]
+        end
+        r=r+1
+        result[r]=char(operation) 
+        top=0
+      end
+    end
+  end
+  local process
+  local function call(scope,list,bias) 
+    depth=depth+1
+    if top==0 then
+      showstate(formatters["unknown %s call"](scope))
+      top=0
+    else
+      local index=stack[top]+bias
+      top=top-1
+      if trace_charstrings then
+        showvalue(scope,index,true)
+      end
+      local tab=list[index]
+      if tab then
+        process(tab)
+      else
+        showstate(formatters["unknown %s call %i"](scope,index))
+        top=0
+      end
+    end
+    depth=depth-1
+  end
+  local justpass=false
+  process=function(tab)
+    local i=1
+    local n=#tab
+    while i<=n do
+      local t=tab[i]
+      if t>=32 then
+        top=top+1
+        if t<=246 then
+          stack[top]=t-139
+          i=i+1
+        elseif t<=250 then
+          stack[top]=t*256-63124+tab[i+1]
+          i=i+2
+        elseif t<=254 then
+          stack[top]=-t*256+64148-tab[i+1]
+          i=i+2
+        else
+          local n=0x100*tab[i+1]+tab[i+2]
+          if n>=0x8000 then
+            stack[top]=n-0x10000+(0x100*tab[i+3]+tab[i+4])/0xFFFF
+          else
+            stack[top]=n+(0x100*tab[i+3]+tab[i+4])/0xFFFF
+          end
+          i=i+5
+        end
+      elseif t==28 then
+        top=top+1
+        local n=0x100*tab[i+1]+tab[i+2]
+        if n>=0x8000 then
+          stack[top]=n-0x10000
+        else
+          stack[top]=n
+        end
+        i=i+3
+      elseif t==11 then 
+        if trace_charstrings then
+          showstate("return")
+        end
+        return
+      elseif t==10 then
+        call("local",locals,localbias) 
+        i=i+1
+      elseif t==14 then 
+        if width then
+        elseif top>0 then
+          width=stack[1]
+          if trace_charstrings then
+            showvalue("width",width)
+          end
+        else
+          width=true
+        end
+        if trace_charstrings then
+          showstate("endchar")
+        end
+        return
+      elseif t==29 then
+        call("global",globals,globalbias) 
+        i=i+1
+      elseif t==12 then
+        i=i+1
+        local t=tab[i]
+        local a=subactions[t]
+        if a then
+          a(t)
+        else
+          if trace_charstrings then
+            showvalue("<subaction>",t)
+          end
+          top=0
+        end
+        i=i+1
+      elseif justpass then
+        passon(t)
+        i=i+1
+      else
+        local a=actions[t]
+        if a then
+          local s=a(t)
+          if s then
+            i=i+s+1
+          else
+            i=i+1
+          end
+        else
+          if trace_charstrings then
+            showvalue("<action>",t)
+          end
+          top=0
+          i=i+1
+        end
+      end
+    end
+  end
+  local function setbias(globals,locals)
+    if version==1 then
+      return
+        false,
+        false
+    else
+      local g,l=#globals,#locals
+      return
+        ((g<1240 and 107) or (g<33900 and 1131) or 32768)+1,
+        ((l<1240 and 107) or (l<33900 and 1131) or 32768)+1
+    end
+  end
+  local function processshape(tab,index)
+    tab=bytetable(tab)
+    x=0
+    y=0
+    width=false
+    r=0
+    top=0
+    stems=0
+    result={} 
+    xmin=0
+    xmax=0
+    ymin=0
+    ymax=0
+    checked=false
+    if trace_charstrings then
+      report("glyph: %i",index)
+      report("data : % t",tab)
+    end
+    if regions then
+      updateregions(vsindex)
+    end
+    process(tab)
+    local boundingbox={
+      round(xmin),
+      round(ymin),
+      round(xmax),
+      round(ymax),
+    }
+    if width==true or width==false then
+      width=defaultwidth
+    else
+      width=nominalwidth+width
+    end
+    local glyph=glyphs[index] 
+    if justpass then
+      r=r+1
+      result[r]=c_endchar
+      local stream=concat(result)
+      if glyph then
+        glyph.stream=stream
+      else
+        glyphs[index]={ stream=stream }
+      end
+    elseif glyph then
+      glyph.segments=keepcurve~=false and result or nil
+      glyph.boundingbox=boundingbox
+      if not glyph.width then
+        glyph.width=width
+      end
+      if charset and not glyph.name then
+        glyph.name=charset[index]
+      end
+    elseif keepcurve then
+      glyphs[index]={
+        segments=result,
+        boundingbox=boundingbox,
+        width=width,
+        name=charset and charset[index] or nil,
+      }
+    else
+      glyphs[index]={
+        boundingbox=boundingbox,
+        width=width,
+        name=charset and charset[index] or nil,
+      }
+    end
+    if trace_charstrings then
+      report("width      : %s",tostring(width))
+      report("boundingbox: % t",boundingbox)
+    end
+  end
+  startparsing=function(fontdata,data,streams)
+    reginit=false
+    axis=false
+    regions=data.regions
+    justpass=streams==true
+    if regions then
+      regions={ regions } 
+      axis=data.factors or false
+    end
+  end
+  stopparsing=function(fontdata,data)
+    stack={}
+    glyphs=false
+    result={}
+    top=0
+    locals=false
+    globals=false
+    strings=false
+  end
+  local function setwidths(private)
+    if not private then
+      return 0,0
+    end
+    local privatedata=private.data
+    if not privatedata then
+      return 0,0
+    end
+    return privatedata.nominalwidthx or 0,privatedata.defaultwidthx or 0
+  end
+  parsecharstrings=function(fontdata,data,glphs,doshapes,tversion,streams)
+    local dictionary=data.dictionaries[1]
+    local charstrings=dictionary.charstrings
+    keepcurve=doshapes
+    version=tversion
+    strings=data.strings
+    globals=data.routines or {}
+    locals=dictionary.subroutines or {}
+    charset=dictionary.charset
+    vsindex=dictionary.vsindex or 0
+    glyphs=glphs or {}
+    globalbias,localbias=setbias(globals,locals)
+    nominalwidth,defaultwidth=setwidths(dictionary.private)
+    startparsing(fontdata,data,streams)
+    for index=1,#charstrings do
+      processshape(charstrings[index],index-1)
+      charstrings[index]=nil 
+    end
+    stopparsing(fontdata,data)
+    return glyphs
+  end
+  parsecharstring=function(fontdata,data,dictionary,tab,glphs,index,doshapes,tversion)
+    keepcurve=doshapes
+    version=tversion
+    strings=data.strings
+    globals=data.routines or {}
+    locals=dictionary.subroutines or {}
+    charset=false
+    vsindex=dictionary.vsindex or 0
+    glyphs=glphs or {}
+    globalbias,localbias=setbias(globals,locals)
+    nominalwidth,defaultwidth=setwidths(dictionary.private)
+    processshape(tab,index-1)
+  end
+end
+local function readglobals(f,data)
+  local routines=readlengths(f)
+  for i=1,#routines do
+    routines[i]=readbytetable(f,routines[i])
+  end
+  data.routines=routines
+end
+local function readencodings(f,data)
+  data.encodings={}
+end
+local function readcharsets(f,data,dictionary)
+  local header=data.header
+  local strings=data.strings
+  local nofglyphs=data.nofglyphs
+  local charsetoffset=dictionary.charset
+  if charsetoffset and charsetoffset~=0 then
+    setposition(f,header.offset+charsetoffset)
+    local format=readbyte(f)
+    local charset={ [0]=".notdef" }
+    dictionary.charset=charset
+    if format==0 then
+      for i=1,nofglyphs do
+        charset[i]=strings[readushort(f)]
+      end
+    elseif format==1 or format==2 then
+      local readcount=format==1 and readbyte or readushort
+      local i=1
+      while i<=nofglyphs do
+        local sid=readushort(f)
+        local n=readcount(f)
+        for s=sid,sid+n do
+          charset[i]=strings[s]
+          i=i+1
+          if i>nofglyphs then
+            break
+          end
+        end
+      end
+    else
+      report("cff parser: unsupported charset format %a",format)
+    end
+  else
+    dictionary.nocharset=true
+    dictionary.charset=nil
+  end
+end
+local function readprivates(f,data)
+  local header=data.header
+  local dictionaries=data.dictionaries
+  local private=dictionaries[1].private
+  if private then
+    setposition(f,header.offset+private.offset)
+    private.data=readstring(f,private.size)
+  end
+end
+local function readlocals(f,data,dictionary)
+  local header=data.header
+  local private=dictionary.private
+  if private then
+    local subroutineoffset=private.data.subroutines
+    if subroutineoffset~=0 then
+      setposition(f,header.offset+private.offset+subroutineoffset)
+      local subroutines=readlengths(f)
+      for i=1,#subroutines do
+        subroutines[i]=readbytetable(f,subroutines[i])
+      end
+      dictionary.subroutines=subroutines
+      private.data.subroutines=nil
+    else
+      dictionary.subroutines={}
+    end
+  else
+    dictionary.subroutines={}
+  end
+end
+local function readcharstrings(f,data,what)
+  local header=data.header
+  local dictionaries=data.dictionaries
+  local dictionary=dictionaries[1]
+  local stringtype=dictionary.charstringtype
+  local offset=dictionary.charstrings
+  if type(offset)~="number" then
+  elseif stringtype==2 then
+    setposition(f,header.offset+offset)
+    local charstrings=readlengths(f,what=="cff2")
+    local nofglyphs=#charstrings
+    for i=1,nofglyphs do
+      charstrings[i]=readstring(f,charstrings[i])
+    end
+    data.nofglyphs=nofglyphs
+    dictionary.charstrings=charstrings
+  else
+    report("unsupported charstr type %i",stringtype)
+    data.nofglyphs=0
+    dictionary.charstrings={}
+  end
+end
+local function readcidprivates(f,data)
+  local header=data.header
+  local dictionaries=data.dictionaries[1].cid.dictionaries
+  for i=1,#dictionaries do
+    local dictionary=dictionaries[i]
+    local private=dictionary.private
+    if private then
+      setposition(f,header.offset+private.offset)
+      private.data=readstring(f,private.size)
+    end
+  end
+  parseprivates(data,dictionaries)
+end
+readers.parsecharstrings=parsecharstrings 
+local function readnoselect(f,fontdata,data,glyphs,doshapes,version,streams)
+  local dictionaries=data.dictionaries
+  local dictionary=dictionaries[1]
+  readglobals(f,data)
+  readcharstrings(f,data,version)
+  if version=="cff2" then
+    dictionary.charset=nil
+  else
+    readencodings(f,data)
+    readcharsets(f,data,dictionary)
+  end
+  readprivates(f,data)
+  parseprivates(data,data.dictionaries)
+  readlocals(f,data,dictionary)
+  startparsing(fontdata,data,streams)
+  parsecharstrings(fontdata,data,glyphs,doshapes,version,streams)
+  stopparsing(fontdata,data)
+end
+local function readfdselect(f,fontdata,data,glyphs,doshapes,version,streams)
+  local header=data.header
+  local dictionaries=data.dictionaries
+  local dictionary=dictionaries[1]
+  local cid=dictionary.cid
+  local cidselect=cid and cid.fdselect
+  readglobals(f,data)
+  readcharstrings(f,data,version)
+  if version~="cff2" then
+    readencodings(f,data)
+  end
+  local charstrings=dictionary.charstrings
+  local fdindex={}
+  local nofglyphs=data.nofglyphs
+  local maxindex=-1
+  setposition(f,header.offset+cidselect)
+  local format=readbyte(f)
+  if format==1 then
+    for i=0,nofglyphs do 
+      local index=readbyte(i)
+      fdindex[i]=index
+      if index>maxindex then
+        maxindex=index
+      end
+    end
+  elseif format==3 then
+    local nofranges=readushort(f)
+    local first=readushort(f)
+    local index=readbyte(f)
+    while true do
+      local last=readushort(f)
+      if index>maxindex then
+        maxindex=index
+      end
+      for i=first,last do
+        fdindex[i]=index
+      end
+      if last>=nofglyphs then
+        break
+      else
+        first=last+1
+        index=readbyte(f)
+      end
+    end
+  else
+  end
+  if maxindex>=0 then
+    local cidarray=cid.fdarray
+    setposition(f,header.offset+cidarray)
+    local dictionaries=readlengths(f)
+    for i=1,#dictionaries do
+      dictionaries[i]=readstring(f,dictionaries[i])
+    end
+    parsedictionaries(data,dictionaries)
+    cid.dictionaries=dictionaries
+    readcidprivates(f,data)
+    for i=1,#dictionaries do
+      readlocals(f,data,dictionaries[i])
+    end
+    startparsing(fontdata,data,streams)
+    for i=1,#charstrings do
+      parsecharstring(fontdata,data,dictionaries[fdindex[i]+1],charstrings[i],glyphs,i,doshapes,version)
+      charstrings[i]=nil
+    end
+    stopparsing(fontdata,data)
+  end
+end
+local gotodatatable=readers.helpers.gotodatatable
+local function cleanup(data,dictionaries)
+end
+function readers.cff(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"cff",specification.details)
+  if tableoffset then
+    local header=readheader(f)
+    if header.major~=1 then
+      report("only version %s is supported for table %a",1,"cff")
+      return
+    end
+    local glyphs=fontdata.glyphs
+    local names=readfontnames(f)
+    local dictionaries=readtopdictionaries(f)
+    local strings=readstrings(f)
+    local data={
+      header=header,
+      names=names,
+      dictionaries=dictionaries,
+      strings=strings,
+      nofglyphs=fontdata.nofglyphs,
+    }
+    parsedictionaries(data,dictionaries,"cff")
+    local dic=dictionaries[1]
+    local cid=dic.cid
+    fontdata.cffinfo={
+      familynamename=dic.familyname,
+      fullname=dic.fullname,
+      boundingbox=dic.boundingbox,
+      weight=dic.weight,
+      italicangle=dic.italicangle,
+      underlineposition=dic.underlineposition,
+      underlinethickness=dic.underlinethickness,
+      monospaced=dic.monospaced,
+    }
+    fontdata.cidinfo=cid and {
+      registry=cid.registry,
+      ordering=cid.ordering,
+      supplement=cid.supplement,
+    }
+    if specification.glyphs then
+      local all=specification.shapes or false
+      if cid and cid.fdselect then
+        readfdselect(f,fontdata,data,glyphs,all,"cff")
+      else
+        readnoselect(f,fontdata,data,glyphs,all,"cff")
+      end
+    end
+    cleanup(data,dictionaries)
+  end
+end
+function readers.cff2(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"cff2",specification.glyphs)
+  if tableoffset then
+    local header=readheader(f)
+    if header.major~=2 then
+      report("only version %s is supported for table %a",2,"cff2")
+      return
+    end
+    local glyphs=fontdata.glyphs
+    local dictionaries={ readstring(f,header.dsize) }
+    local data={
+      header=header,
+      dictionaries=dictionaries,
+      nofglyphs=fontdata.nofglyphs,
+    }
+    parsedictionaries(data,dictionaries,"cff2")
+    local offset=dictionaries[1].vstore
+    if offset>0 then
+      local storeoffset=dictionaries[1].vstore+data.header.offset+2 
+      local regions,deltas=readers.helpers.readvariationdata(f,storeoffset,factors)
+      data.regions=regions
+      data.deltas=deltas
+    else
+      data.regions={}
+      data.deltas={}
+    end
+    data.factors=specification.factors
+    local cid=data.dictionaries[1].cid
+    local all=specification.shapes or false
+    if cid and cid.fdselect then
+      readfdselect(f,fontdata,data,glyphs,all,"cff2",specification.streams)
+    else
+      readnoselect(f,fontdata,data,glyphs,all,"cff2",specification.streams)
+    end
+    cleanup(data,dictionaries)
+  end
+end
+function readers.cffcheck(filename)
+  local f=io.open(filename,"rb")
+  if f then
+    local fontdata={
+      glyphs={},
+    }
+    local header=readheader(f)
+    if header.major~=1 then
+      report("only version %s is supported for table %a",1,"cff")
+      return
+    end
+    local names=readfontnames(f)
+    local dictionaries=readtopdictionaries(f)
+    local strings=readstrings(f)
+    local glyphs={}
+    local data={
+      header=header,
+      names=names,
+      dictionaries=dictionaries,
+      strings=strings,
+      glyphs=glyphs,
+      nofglyphs=4,
+    }
+    parsedictionaries(data,dictionaries,"cff")
+    local cid=data.dictionaries[1].cid
+    if cid and cid.fdselect then
+      readfdselect(f,fontdata,data,glyphs,false)
+    else
+      readnoselect(f,fontdata,data,glyphs,false)
+    end
+    return data
+  end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-ttf']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local next,type,unpack=next,type,unpack
+local bittest,band,rshift=bit32.btest,bit32.band,bit32.rshift
+local sqrt,round=math.sqrt,math.round
+local char=string.char
+local concat=table.concat
+local report=logs.reporter("otf reader","ttf")
+local trace_deltas=false
+local readers=fonts.handlers.otf.readers
+local streamreader=readers.streamreader
+local setposition=streamreader.setposition
+local getposition=streamreader.getposition
+local skipbytes=streamreader.skip
+local readbyte=streamreader.readcardinal1 
+local readushort=streamreader.readcardinal2 
+local readulong=streamreader.readcardinal4 
+local readchar=streamreader.readinteger1  
+local readshort=streamreader.readinteger2  
+local read2dot14=streamreader.read2dot14   
+local readinteger=streamreader.readinteger1
+local helpers=readers.helpers
+local gotodatatable=helpers.gotodatatable
+local function mergecomposites(glyphs,shapes)
+  local function merge(index,shape,components)
+    local contours={}
+    local points={}
+    local nofcontours=0
+    local nofpoints=0
+    local offset=0
+    local deltas=shape.deltas
+    for i=1,#components do
+      local component=components[i]
+      local subindex=component.index
+      local subshape=shapes[subindex]
+      local subcontours=subshape.contours
+      local subpoints=subshape.points
+      if not subcontours then
+        local subcomponents=subshape.components
+        if subcomponents then
+          subcontours,subpoints=merge(subindex,subshape,subcomponents)
+        end
+      end
+      if subpoints then
+        local matrix=component.matrix
+        local xscale=matrix[1]
+        local xrotate=matrix[2]
+        local yrotate=matrix[3]
+        local yscale=matrix[4]
+        local xoffset=matrix[5]
+        local yoffset=matrix[6]
+        for i=1,#subpoints do
+          local p=subpoints[i]
+          local x=p[1]
+          local y=p[2]
+          nofpoints=nofpoints+1
+          points[nofpoints]={
+            xscale*x+xrotate*y+xoffset,
+            yscale*y+yrotate*x+yoffset,
+            p[3]
+          }
+        end
+        for i=1,#subcontours do
+          nofcontours=nofcontours+1
+          contours[nofcontours]=offset+subcontours[i]
+        end
+        offset=offset+#subpoints
+      else
+        report("missing contours composite %s, component %s of %s, glyph %s",index,i,#components,subindex)
+      end
+    end
+    shape.points=points 
+    shape.contours=contours
+    shape.components=nil
+    return contours,points
+  end
+  for index=1,#glyphs do
+    local shape=shapes[index]
+    if shape then
+      local components=shape.components
+      if components then
+        merge(index,shape,components)
+      end
+    end
+  end
+end
+local function readnothing(f,nofcontours)
+  return {
+    type="nothing",
+  }
+end
+local function curveto(m_x,m_y,l_x,l_y,r_x,r_y) 
+  return
+    l_x+2/3*(m_x-l_x),l_y+2/3*(m_y-l_y),
+    r_x+2/3*(m_x-r_x),r_y+2/3*(m_y-r_y),
+    r_x,r_y,"c"
+end
+local function applyaxis(glyph,shape,deltas,dowidth)
+  local points=shape.points
+  if points then
+    local nofpoints=#points
+    local h=nofpoints+2 
+    local l=nofpoints+1
+    local dw=0
+    local dl=0
+    for i=1,#deltas do
+      local deltaset=deltas[i]
+      local xvalues=deltaset.xvalues
+      local yvalues=deltaset.yvalues
+      local dpoints=deltaset.points
+      local factor=deltaset.factor
+      if dpoints then
+        local nofdpoints=#dpoints
+        for i=1,nofdpoints do
+          local d=dpoints[i]
+          local p=points[d]
+          if p then
+            if xvalues then
+              local x=xvalues[i]
+              if x and x~=0 then
+                p[1]=p[1]+factor*x
+              end
+            end
+            if yvalues then
+              local y=yvalues[i]
+              if y and y~=0 then
+                p[2]=p[2]+factor*y
+              end
+            end
+          elseif dowidth then
+            if d==h then
+              local x=xvalues[i]
+              if x then
+                dw=dw+factor*x
+              end
+            elseif d==l then
+              local x=xvalues[i]
+              if x then
+                dl=dl+factor*x
+              end
+            end
+          end
+        end
+      else
+        for i=1,nofpoints do
+          local p=points[i]
+          if xvalues then
+            local x=xvalues[i]
+            if x and x~=0 then
+              p[1]=p[1]+factor*x
+            end
+          end
+          if yvalues then
+            local y=yvalues[i]
+            if y and y~=0 then
+              p[2]=p[2]+factor*y
+            end
+          end
+        end
+        if dowidth then
+          local x=xvalues[h]
+          if x then
+            dw=dw+factor*x
+          end
+          local x=xvalues[l]
+          if x then
+            dl=dl+factor*x
+          end
+        end
+      end
+    end
+    if dowidth then
+      local width=glyph.width or 0
+      glyph.width=width+dw-dl
+    end
+  else
+    report("no points for glyph %a",glyph.name)
+  end
+end
+local quadratic=false
+local function contours2outlines_normal(glyphs,shapes) 
+  for index=1,#glyphs do
+    local shape=shapes[index]
+    if shape then
+      local glyph=glyphs[index]
+      local contours=shape.contours
+      local points=shape.points
+      if contours then
+        local nofcontours=#contours
+        local segments={}
+        local nofsegments=0
+        glyph.segments=segments
+        if nofcontours>0 then
+          local px,py=0,0 
+          local first=1
+          for i=1,nofcontours do
+            local last=contours[i]
+            if last>=first then
+              local first_pt=points[first]
+              local first_on=first_pt[3]
+              if first==last then
+                first_pt[3]="m" 
+                nofsegments=nofsegments+1
+                segments[nofsegments]=first_pt
+              else 
+                local first_on=first_pt[3]
+                local last_pt=points[last]
+                local last_on=last_pt[3]
+                local start=1
+                local control_pt=false
+                if first_on then
+                  start=2
+                else
+                  if last_on then
+                    first_pt=last_pt
+                  else
+                    first_pt={ (first_pt[1]+last_pt[1])/2,(first_pt[2]+last_pt[2])/2,false }
+                  end
+                  control_pt=first_pt
+                end
+                local x,y=first_pt[1],first_pt[2]
+                if not done then
+                  xmin,ymin,xmax,ymax=x,y,x,y
+                  done=true
+                end
+                nofsegments=nofsegments+1
+                segments[nofsegments]={ x,y,"m" } 
+                if not quadratic then
+                  px,py=x,y
+                end
+                local previous_pt=first_pt
+                for i=first,last do
+                  local current_pt=points[i]
+                  local current_on=current_pt[3]
+                  local previous_on=previous_pt[3]
+                  if previous_on then
+                    if current_on then
+                      local x,y=current_pt[1],current_pt[2]
+                      nofsegments=nofsegments+1
+                      segments[nofsegments]={ x,y,"l" } 
+                      if not quadratic then
+                        px,py=x,y
+                      end
+                    else
+                      control_pt=current_pt
+                    end
+                  elseif current_on then
+                    local x1,y1=control_pt[1],control_pt[2]
+                    local x2,y2=current_pt[1],current_pt[2]
+                    nofsegments=nofsegments+1
+                    if quadratic then
+                      segments[nofsegments]={ x1,y1,x2,y2,"q" } 
+                    else
+                      x1,y1,x2,y2,px,py=curveto(x1,y1,px,py,x2,y2)
+                      segments[nofsegments]={ x1,y1,x2,y2,px,py,"c" } 
+                    end
+                    control_pt=false
+                  else
+                    local x2,y2=(previous_pt[1]+current_pt[1])/2,(previous_pt[2]+current_pt[2])/2
+                    local x1,y1=control_pt[1],control_pt[2]
+                    nofsegments=nofsegments+1
+                    if quadratic then
+                      segments[nofsegments]={ x1,y1,x2,y2,"q" } 
+                    else
+                      x1,y1,x2,y2,px,py=curveto(x1,y1,px,py,x2,y2)
+                      segments[nofsegments]={ x1,y1,x2,y2,px,py,"c" } 
+                    end
+                    control_pt=current_pt
+                  end
+                  previous_pt=current_pt
+                end
+                if first_pt==last_pt then
+                else
+                  nofsegments=nofsegments+1
+                  local x2,y2=first_pt[1],first_pt[2]
+                  if not control_pt then
+                    segments[nofsegments]={ x2,y2,"l" } 
+                  elseif quadratic then
+                    local x1,y1=control_pt[1],control_pt[2]
+                    segments[nofsegments]={ x1,y1,x2,y2,"q" } 
+                  else
+                    local x1,y1=control_pt[1],control_pt[2]
+                    x1,y1,x2,y2,px,py=curveto(x1,y1,px,py,x2,y2)
+                    segments[nofsegments]={ x1,y1,x2,y2,px,py,"c" }
+                  end
+                end
+              end
+            end
+            first=last+1
+          end
+        end
+      end
+    end
+  end
+end
+local function contours2outlines_shaped(glyphs,shapes,keepcurve)
+  for index=1,#glyphs do
+    local shape=shapes[index]
+    if shape then
+      local glyph=glyphs[index]
+      local contours=shape.contours
+      local points=shape.points
+      if contours then
+        local nofcontours=#contours
+        local segments=keepcurve and {} or nil
+        local nofsegments=0
+        if keepcurve then
+          glyph.segments=segments
+        end
+        if nofcontours>0 then
+          local xmin,ymin,xmax,ymax,done=0,0,0,0,false
+          local px,py=0,0 
+          local first=1
+          for i=1,nofcontours do
+            local last=contours[i]
+            if last>=first then
+              local first_pt=points[first]
+              local first_on=first_pt[3]
+              if first==last then
+                if keepcurve then
+                  first_pt[3]="m" 
+                  nofsegments=nofsegments+1
+                  segments[nofsegments]=first_pt
+                end
+              else 
+                local first_on=first_pt[3]
+                local last_pt=points[last]
+                local last_on=last_pt[3]
+                local start=1
+                local control_pt=false
+                if first_on then
+                  start=2
+                else
+                  if last_on then
+                    first_pt=last_pt
+                  else
+                    first_pt={ (first_pt[1]+last_pt[1])/2,(first_pt[2]+last_pt[2])/2,false }
+                  end
+                  control_pt=first_pt
+                end
+                local x,y=first_pt[1],first_pt[2]
+                if not done then
+                  xmin,ymin,xmax,ymax=x,y,x,y
+                  done=true
+                else
+                  if x<xmin then xmin=x elseif x>xmax then xmax=x end
+                  if y<ymin then ymin=y elseif y>ymax then ymax=y end
+                end
+                if keepcurve then
+                  nofsegments=nofsegments+1
+                  segments[nofsegments]={ x,y,"m" } 
+                end
+                if not quadratic then
+                  px,py=x,y
+                end
+                local previous_pt=first_pt
+                for i=first,last do
+                  local current_pt=points[i]
+                  local current_on=current_pt[3]
+                  local previous_on=previous_pt[3]
+                  if previous_on then
+                    if current_on then
+                      local x,y=current_pt[1],current_pt[2]
+                      if x<xmin then xmin=x elseif x>xmax then xmax=x end
+                      if y<ymin then ymin=y elseif y>ymax then ymax=y end
+                      if keepcurve then
+                        nofsegments=nofsegments+1
+                        segments[nofsegments]={ x,y,"l" } 
+                      end
+                      if not quadratic then
+                        px,py=x,y
+                      end
+                    else
+                      control_pt=current_pt
+                    end
+                  elseif current_on then
+                    local x1,y1=control_pt[1],control_pt[2]
+                    local x2,y2=current_pt[1],current_pt[2]
+                    if quadratic then
+                      if x1<xmin then xmin=x1 elseif x1>xmax then xmax=x1 end
+                      if y1<ymin then ymin=y1 elseif y1>ymax then ymax=y1 end
+                      if keepcurve then
+                        nofsegments=nofsegments+1
+                        segments[nofsegments]={ x1,y1,x2,y2,"q" } 
+                      end
+                    else
+                      x1,y1,x2,y2,px,py=curveto(x1,y1,px,py,x2,y2)
+                      if x1<xmin then xmin=x1 elseif x1>xmax then xmax=x1 end
+                      if y1<ymin then ymin=y1 elseif y1>ymax then ymax=y1 end
+                      if x2<xmin then xmin=x2 elseif x2>xmax then xmax=x2 end
+                      if y2<ymin then ymin=y2 elseif y2>ymax then ymax=y2 end
+                      if px<xmin then xmin=px elseif px>xmax then xmax=px end
+                      if py<ymin then ymin=py elseif py>ymax then ymax=py end
+                      if keepcurve then
+                        nofsegments=nofsegments+1
+                        segments[nofsegments]={ x1,y1,x2,y2,px,py,"c" } 
+                      end
+                    end
+                    control_pt=false
+                  else
+                    local x2,y2=(previous_pt[1]+current_pt[1])/2,(previous_pt[2]+current_pt[2])/2
+                    local x1,y1=control_pt[1],control_pt[2]
+                    if quadratic then
+                      if x1<xmin then xmin=x1 elseif x1>xmax then xmax=x1 end
+                      if y1<ymin then ymin=y1 elseif y1>ymax then ymax=y1 end
+                      if keepcurve then
+                        nofsegments=nofsegments+1
+                        segments[nofsegments]={ x1,y1,x2,y2,"q" } 
+                      end
+                    else
+                      x1,y1,x2,y2,px,py=curveto(x1,y1,px,py,x2,y2)
+                      if x1<xmin then xmin=x1 elseif x1>xmax then xmax=x1 end
+                      if y1<ymin then ymin=y1 elseif y1>ymax then ymax=y1 end
+                      if x2<xmin then xmin=x2 elseif x2>xmax then xmax=x2 end
+                      if y2<ymin then ymin=y2 elseif y2>ymax then ymax=y2 end
+                      if px<xmin then xmin=px elseif px>xmax then xmax=px end
+                      if py<ymin then ymin=py elseif py>ymax then ymax=py end
+                      if keepcurve then
+                        nofsegments=nofsegments+1
+                        segments[nofsegments]={ x1,y1,x2,y2,px,py,"c" } 
+                      end
+                    end
+                    control_pt=current_pt
+                  end
+                  previous_pt=current_pt
+                end
+                if first_pt==last_pt then
+                elseif not control_pt then
+                  if keepcurve then
+                    nofsegments=nofsegments+1
+                    segments[nofsegments]={ first_pt[1],first_pt[2],"l" } 
+                  end
+                else
+                  local x1,y1=control_pt[1],control_pt[2]
+                  local x2,y2=first_pt[1],first_pt[2]
+                  if x1<xmin then xmin=x1 elseif x1>xmax then xmax=x1 end
+                  if y1<ymin then ymin=y1 elseif y1>ymax then ymax=y1 end
+                  if quadratic then
+                    if keepcurve then
+                      nofsegments=nofsegments+1
+                      segments[nofsegments]={ x1,y1,x2,y2,"q" } 
+                    end
+                  else
+                    x1,y1,x2,y2,px,py=curveto(x1,y1,px,py,x2,y2)
+                    if x2<xmin then xmin=x2 elseif x2>xmax then xmax=x2 end
+                    if y2<ymin then ymin=y2 elseif y2>ymax then ymax=y2 end
+                    if px<xmin then xmin=px elseif px>xmax then xmax=px end
+                    if py<ymin then ymin=py elseif py>ymax then ymax=py end
+                    if keepcurve then
+                      nofsegments=nofsegments+1
+                      segments[nofsegments]={ x1,y1,x2,y2,px,py,"c" } 
+                    end
+                  end
+                end
+              end
+            end
+            first=last+1
+          end
+          glyph.boundingbox={ round(xmin),round(ymin),round(xmax),round(ymax) }
+        end
+      end
+    end
+  end
+end
+local c_zero=char(0)
+local s_zero=char(0,0)
+local function toushort(n)
+  return char(band(rshift(n,8),0xFF),band(n,0xFF))
+end
+local function toshort(n)
+  if n<0 then
+    n=n+0x10000
+  end
+  return char(band(rshift(n,8),0xFF),band(n,0xFF))
+end
+local function repackpoints(glyphs,shapes)
+  local noboundingbox={ 0,0,0,0 }
+  local result={} 
+  for index=1,#glyphs do
+    local shape=shapes[index]
+    if shape then
+      local r=0
+      local glyph=glyphs[index]
+      if false then
+      else
+        local contours=shape.contours
+        local nofcontours=contours and #contours or 0
+        local boundingbox=glyph.boundingbox or noboundingbox
+        r=r+1 result[r]=toshort(nofcontours)
+        r=r+1 result[r]=toshort(boundingbox[1]) 
+        r=r+1 result[r]=toshort(boundingbox[2]) 
+        r=r+1 result[r]=toshort(boundingbox[3]) 
+        r=r+1 result[r]=toshort(boundingbox[4]) 
+        if nofcontours>0 then
+          for i=1,nofcontours do
+            r=r+1 result[r]=toshort(contours[i]-1)
+          end
+          r=r+1 result[r]=s_zero 
+          local points=shape.points
+          local currentx=0
+          local currenty=0
+          local xpoints={}
+          local ypoints={}
+          local x=0
+          local y=0
+          local lastflag=nil
+          local nofflags=0
+          for i=1,#points do
+            local pt=points[i]
+            local px=pt[1]
+            local py=pt[2]
+            local fl=pt[3] and 0x01 or 0x00
+            if px==currentx then
+              fl=fl+0x10
+            else
+              local dx=round(px-currentx)
+              if dx<-255 or dx>255 then
+                x=x+1 xpoints[x]=toshort(dx)
+              elseif dx<0 then
+                fl=fl+0x02
+                x=x+1 xpoints[x]=char(-dx)
+              elseif dx>0 then
+                fl=fl+0x12
+                x=x+1 xpoints[x]=char(dx)
+              else
+                fl=fl+0x02
+                x=x+1 xpoints[x]=c_zero
+              end
+            end
+            if py==currenty then
+              fl=fl+0x20
+            else
+              local dy=round(py-currenty)
+              if dy<-255 or dy>255 then
+                y=y+1 ypoints[y]=toshort(dy)
+              elseif dy<0 then
+                fl=fl+0x04
+                y=y+1 ypoints[y]=char(-dy)
+              elseif dy>0 then
+                fl=fl+0x24
+                y=y+1 ypoints[y]=char(dy)
+              else
+                fl=fl+0x04
+                y=y+1 ypoints[y]=c_zero
+              end
+            end
+            currentx=px
+            currenty=py
+            if lastflag==fl then
+              nofflags=nofflags+1
+            else 
+              if nofflags==1 then
+                r=r+1 result[r]=char(lastflag)
+              elseif nofflags==2 then
+                r=r+1 result[r]=char(lastflag,lastflag)
+              elseif nofflags>2 then
+                lastflag=lastflag+0x08
+                r=r+1 result[r]=char(lastflag,nofflags-1)
+              end
+              nofflags=1
+              lastflag=fl
+            end
+          end
+          if nofflags==1 then
+            r=r+1 result[r]=char(lastflag)
+          elseif nofflags==2 then
+            r=r+1 result[r]=char(lastflag,lastflag)
+          elseif nofflags>2 then
+            lastflag=lastflag+0x08
+            r=r+1 result[r]=char(lastflag,nofflags-1)
+          end
+          r=r+1 result[r]=concat(xpoints)
+          r=r+1 result[r]=concat(ypoints)
+        end
+      end
+      glyph.stream=concat(result,"",1,r)
+    else
+    end
+  end
+end
+local function readglyph(f,nofcontours) 
+  local points={}
+  local contours={}
+  local instructions={}
+  local flags={}
+  for i=1,nofcontours do
+    contours[i]=readshort(f)+1
+  end
+  local nofpoints=contours[nofcontours]
+  local nofinstructions=readushort(f)
+  skipbytes(f,nofinstructions)
+  local i=1
+  while i<=nofpoints do
+    local flag=readbyte(f)
+    flags[i]=flag
+    if bittest(flag,0x08) then
+      for j=1,readbyte(f) do
+        i=i+1
+        flags[i]=flag
+      end
+    end
+    i=i+1
+  end
+  local x=0
+  for i=1,nofpoints do
+    local flag=flags[i]
+    local short=bittest(flag,0x02)
+    local same=bittest(flag,0x10)
+    if short then
+      if same then
+        x=x+readbyte(f)
+      else
+        x=x-readbyte(f)
+      end
+    elseif same then
+    else
+      x=x+readshort(f)
+    end
+    points[i]={ x,0,bittest(flag,0x01) }
+  end
+  local y=0
+  for i=1,nofpoints do
+    local flag=flags[i]
+    local short=bittest(flag,0x04)
+    local same=bittest(flag,0x20)
+    if short then
+      if same then
+        y=y+readbyte(f)
+      else
+        y=y-readbyte(f)
+      end
+    elseif same then
+    else
+      y=y+readshort(f)
+    end
+    points[i][2]=y
+  end
+  return {
+    type="glyph",
+    points=points,
+    contours=contours,
+    nofpoints=nofpoints,
+  }
+end
+local function readcomposite(f)
+  local components={}
+  local nofcomponents=0
+  local instructions=false
+  while true do
+    local flags=readushort(f)
+    local index=readushort(f)
+    local f_xyarg=bittest(flags,0x0002)
+    local f_offset=bittest(flags,0x0800)
+    local xscale=1
+    local xrotate=0
+    local yrotate=0
+    local yscale=1
+    local xoffset=0
+    local yoffset=0
+    local base=false
+    local reference=false
+    if f_xyarg then
+      if bittest(flags,0x0001) then 
+        xoffset=readshort(f)
+        yoffset=readshort(f)
+      else
+        xoffset=readchar(f) 
+        yoffset=readchar(f) 
+      end
+    else
+      if bittest(flags,0x0001) then 
+        base=readshort(f)
+        reference=readshort(f)
+      else
+        base=readchar(f) 
+        reference=readchar(f) 
+      end
+    end
+    if bittest(flags,0x0008) then 
+      xscale=read2dot14(f)
+      yscale=xscale
+      if f_xyarg and f_offset then
+        xoffset=xoffset*xscale
+        yoffset=yoffset*yscale
+      end
+    elseif bittest(flags,0x0040) then 
+      xscale=read2dot14(f)
+      yscale=read2dot14(f)
+      if f_xyarg and f_offset then
+        xoffset=xoffset*xscale
+        yoffset=yoffset*yscale
+      end
+    elseif bittest(flags,0x0080) then 
+      xscale=read2dot14(f)
+      xrotate=read2dot14(f)
+      yrotate=read2dot14(f)
+      yscale=read2dot14(f)
+      if f_xyarg and f_offset then
+        xoffset=xoffset*sqrt(xscale^2+xrotate^2)
+        yoffset=yoffset*sqrt(yrotate^2+yscale^2)
+      end
+    end
+    nofcomponents=nofcomponents+1
+    components[nofcomponents]={
+      index=index,
+      usemine=bittest(flags,0x0200),
+      round=bittest(flags,0x0006),
+      base=base,
+      reference=reference,
+      matrix={ xscale,xrotate,yrotate,yscale,xoffset,yoffset },
+    }
+    if bittest(flags,0x0100) then
+      instructions=true
+    end
+    if not bittest(flags,0x0020) then 
+      break
+    end
+  end
+  return {
+    type="composite",
+    components=components,
+  }
+end
+function readers.loca(f,fontdata,specification)
+  if specification.glyphs then
+    local datatable=fontdata.tables.loca
+    if datatable then
+      local offset=fontdata.tables.glyf.offset
+      local format=fontdata.fontheader.indextolocformat
+      local locations={}
+      setposition(f,datatable.offset)
+      if format==1 then
+        local nofglyphs=datatable.length/4-2
+        for i=0,nofglyphs do
+          locations[i]=offset+readulong(f)
+        end
+        fontdata.nofglyphs=nofglyphs
+      else
+        local nofglyphs=datatable.length/2-2
+        for i=0,nofglyphs do
+          locations[i]=offset+readushort(f)*2
+        end
+        fontdata.nofglyphs=nofglyphs
+      end
+      fontdata.locations=locations
+    end
+  end
+end
+function readers.glyf(f,fontdata,specification) 
+  local tableoffset=gotodatatable(f,fontdata,"glyf",specification.glyphs)
+  if tableoffset then
+    local locations=fontdata.locations
+    if locations then
+      local glyphs=fontdata.glyphs
+      local nofglyphs=fontdata.nofglyphs
+      local filesize=fontdata.filesize
+      local nothing={ 0,0,0,0 }
+      local shapes={}
+      local loadshapes=specification.shapes or specification.instance
+      for index=0,nofglyphs do
+        local location=locations[index]
+        if location>=filesize then
+          report("discarding %s glyphs due to glyph location bug",nofglyphs-index+1)
+          fontdata.nofglyphs=index-1
+          fontdata.badfont=true
+          break
+        elseif location>0 then
+          setposition(f,location)
+          local nofcontours=readshort(f)
+          glyphs[index].boundingbox={
+            readshort(f),
+            readshort(f),
+            readshort(f),
+            readshort(f),
+          }
+          if not loadshapes then
+          elseif nofcontours==0 then
+            shapes[index]=readnothing(f,nofcontours)
+          elseif nofcontours>0 then
+            shapes[index]=readglyph(f,nofcontours)
+          else
+            shapes[index]=readcomposite(f,nofcontours)
+          end
+        else
+          if loadshapes then
+            shapes[index]={}
+          end
+          glyphs[index].boundingbox=nothing
+        end
+      end
+      if loadshapes then
+        if readers.gvar then
+          readers.gvar(f,fontdata,specification,glyphs,shapes)
+        end
+        mergecomposites(glyphs,shapes)
+        if specification.instance then
+          if specification.streams then
+            repackpoints(glyphs,shapes)
+          else
+            contours2outlines_shaped(glyphs,shapes,specification.shapes)
+          end
+        elseif specification.shapes then
+          contours2outlines_normal(glyphs,shapes)
+        end
+      end
+    end
+  end
+end
+local function readtuplerecord(f,nofaxis)
+  local record={}
+  for i=1,nofaxis do
+    record[i]=read2dot14(f)
+  end
+  return record
+end
+local function readpoints(f)
+  local count=readbyte(f)
+  if count==0 then
+    return nil,0 
+  else
+    if count<128 then
+    elseif bittest(count,0x80) then
+      count=band(count,0x7F)*256+readbyte(f)
+    else
+    end
+    local points={}
+    local p=0
+    local n=1 
+    while p<count do
+      local control=readbyte(f)
+      local runreader=bittest(control,0x80) and readushort or readbyte
+      local runlength=band(control,0x7F)
+      for i=1,runlength+1 do
+        n=n+runreader(f)
+        p=p+1
+        points[p]=n
+      end
+    end
+    return points,p
+  end
+end
+local function readdeltas(f,nofpoints)
+  local deltas={}
+  local p=0
+  local z=0
+  while nofpoints>0 do
+    local control=readbyte(f)
+if not control then
+  break
+end
+    local allzero=bittest(control,0x80)
+    local runlength=band(control,0x3F)+1
+    if allzero then
+      z=z+runlength
+    else
+      local runreader=bittest(control,0x40) and readshort or readinteger
+      if z>0 then
+        for i=1,z do
+          p=p+1
+          deltas[p]=0
+        end
+        z=0
+      end
+      for i=1,runlength do
+        p=p+1
+        deltas[p]=runreader(f)
+      end
+    end
+    nofpoints=nofpoints-runlength
+  end
+  if p>0 then
+    return deltas
+  else
+  end
+end
+local function readdeltas(f,nofpoints)
+  local deltas={}
+  local p=0
+  while nofpoints>0 do
+    local control=readbyte(f)
+    if control then
+      local allzero=bittest(control,0x80)
+      local runlength=band(control,0x3F)+1
+      if allzero then
+        for i=1,runlength do
+          p=p+1
+          deltas[p]=0
+        end
+      else
+        local runreader=bittest(control,0x40) and readshort or readinteger
+        for i=1,runlength do
+          p=p+1
+          deltas[p]=runreader(f)
+        end
+      end
+      nofpoints=nofpoints-runlength
+    else
+      break
+    end
+  end
+  if p>0 then
+    return deltas
+  else
+  end
+end
+function readers.gvar(f,fontdata,specification,glyphdata,shapedata)
+  local instance=specification.instance
+  if not instance then
+    return
+  end
+  local factors=specification.factors
+  if not factors then
+    return
+  end
+  local tableoffset=gotodatatable(f,fontdata,"gvar",specification.variable or specification.shapes)
+  if tableoffset then
+    local version=readulong(f) 
+    local nofaxis=readushort(f)
+    local noftuples=readushort(f)
+    local tupleoffset=tableoffset+readulong(f)
+    local nofglyphs=readushort(f)
+    local flags=readushort(f)
+    local dataoffset=tableoffset+readulong(f)
+    local data={}
+    local tuples={}
+    local glyphdata=fontdata.glyphs
+    local dowidth=not fontdata.variabledata.hvarwidths
+    if bittest(flags,0x0001) then
+      for i=1,nofglyphs+1 do
+        data[i]=dataoffset+readulong(f)
+      end
+    else
+      for i=1,nofglyphs+1 do
+        data[i]=dataoffset+2*readushort(f)
+      end
+    end
+    if noftuples>0 then
+      setposition(f,tupleoffset)
+      for i=1,noftuples do
+        tuples[i]=readtuplerecord(f,nofaxis)
+      end
+    end
+    local nextoffset=false
+    local startoffset=data[1]
+    for i=1,nofglyphs do 
+      nextoffset=data[i+1]
+      local glyph=glyphdata[i-1]
+      local name=trace_deltas and glyph.name
+      if startoffset==nextoffset then
+        if name then
+          report("no deltas for glyph %a",name)
+        end
+      else
+        local shape=shapedata[i-1] 
+        if not shape then
+          if name then
+            report("no shape for glyph %a",name)
+          end
+        else
+          lastoffset=startoffset
+          setposition(f,startoffset)
+          local flags=readushort(f)
+          local count=band(flags,0x0FFF)
+          local offset=startoffset+readushort(f) 
+          local deltas={}
+          local allpoints=(shape.nofpoints or 0) 
+          local shared=false
+          local nofshared=0
+          if bittest(flags,0x8000) then
+            local current=getposition(f)
+            setposition(f,offset)
+            shared,nofshared=readpoints(f)
+            offset=getposition(f)
+            setposition(f,current)
+          end
+          for j=1,count do
+            local size=readushort(f) 
+            local flags=readushort(f)
+            local index=band(flags,0x0FFF)
+            local haspeak=bittest(flags,0x8000)
+            local intermediate=bittest(flags,0x4000)
+            local private=bittest(flags,0x2000)
+            local peak=nil
+            local start=nil
+            local stop=nil
+            local xvalues=nil
+            local yvalues=nil
+            local points=shared  
+            local nofpoints=nofshared
+            if haspeak then
+              peak=readtuplerecord(f,nofaxis)
+            else
+              if index+1>#tuples then
+                report("error, bad tuple index",index)
+              end
+              peak=tuples[index+1] 
+            end
+            if intermediate then
+              start=readtuplerecord(f,nofaxis)
+              stop=readtuplerecord(f,nofaxis)
+            end
+            if size>0 then
+              local current=getposition(f)
+              setposition(f,offset)
+              if private then
+                points,nofpoints=readpoints(f)
+              end 
+              if nofpoints==0 then
+                nofpoints=allpoints+4
+              end
+              if nofpoints>0 then
+                xvalues=readdeltas(f,nofpoints)
+                yvalues=readdeltas(f,nofpoints)
+              end
+              offset=offset+size
+              setposition(f,current)
+            end
+            if not xvalues and not yvalues then
+              points=nil
+            end
+            local s=1
+            for i=1,nofaxis do
+              local f=factors[i]
+              local peak=peak and peak [i] or 0
+              local start=start and start[i] or (peak<0 and peak or 0)
+              local stop=stop and stop [i] or (peak>0 and peak or 0)
+              if start>peak or peak>stop then
+              elseif start<0 and stop>0 and peak~=0 then
+              elseif peak==0 then
+              elseif f<start or f>stop then
+                s=0
+                break
+              elseif f<peak then
+                s=s*(f-start)/(peak-start)
+              elseif f>peak then
+                s=s*(stop-f)/(stop-peak)
+              else
+              end
+            end
+            if s==0 then
+              if name then
+                report("no deltas applied for glyph %a",name)
+              end
+            else
+              deltas[#deltas+1]={
+                factor=s,
+                points=points,
+                xvalues=xvalues,
+                yvalues=yvalues,
+              }
+            end
+          end
+          if shape.type=="glyph" then
+            applyaxis(glyph,shape,deltas,dowidth)
+          else
+            shape.deltas=deltas
+          end
+        end
+      end
+      startoffset=nextoffset
+    end
+  end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-dsp']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local next,type=next,type
+local bittest=bit32.btest
+local band=bit32.band
+local extract=bit32.extract
+local bor=bit32.bor
+local lshift=bit32.lshift
+local rshift=bit32.rshift
+local gsub=string.gsub
+local lower=string.lower
+local sub=string.sub
+local strip=string.strip
+local tohash=table.tohash
+local concat=table.concat
+local copy=table.copy
+local reversed=table.reversed
+local sort=table.sort
+local insert=table.insert
+local round=math.round
+local lpegmatch=lpeg.match
+local setmetatableindex=table.setmetatableindex
+local formatters=string.formatters
+local sortedkeys=table.sortedkeys
+local sortedhash=table.sortedhash
+local report=logs.reporter("otf reader")
+local readers=fonts.handlers.otf.readers
+local streamreader=readers.streamreader
+local setposition=streamreader.setposition
+local getposition=streamreader.getposition
+local readushort=streamreader.readcardinal2 
+local readulong=streamreader.readcardinal4 
+local readinteger=streamreader.readinteger1
+local readshort=streamreader.readinteger2  
+local readstring=streamreader.readstring
+local readtag=streamreader.readtag
+local readbytes=streamreader.readbytes
+local readfixed=streamreader.readfixed4
+local read2dot14=streamreader.read2dot14
+local skipshort=streamreader.skipshort
+local skipbytes=streamreader.skip
+local readfword=readshort
+local readbytetable=streamreader.readbytetable
+local readbyte=streamreader.readbyte
+local gsubhandlers={}
+local gposhandlers={}
+readers.gsubhandlers=gsubhandlers
+readers.gposhandlers=gposhandlers
+local helpers=readers.helpers
+local gotodatatable=helpers.gotodatatable
+local setvariabledata=helpers.setvariabledata
+local lookupidoffset=-1  
+local classes={
+  "base",
+  "ligature",
+  "mark",
+  "component",
+}
+local gsubtypes={
+  "single",
+  "multiple",
+  "alternate",
+  "ligature",
+  "context",
+  "chainedcontext",
+  "extension",
+  "reversechainedcontextsingle",
+}
+local gpostypes={
+  "single",
+  "pair",
+  "cursive",
+  "marktobase",
+  "marktoligature",
+  "marktomark",
+  "context",
+  "chainedcontext",
+  "extension",
+}
+local chaindirections={
+  context=0,
+  chainedcontext=1,
+  reversechainedcontextsingle=-1,
+}
+local function setmetrics(data,where,tag,d)
+  local w=data[where]
+  if w then
+    local v=w[tag]
+    if v then
+      w[tag]=v+d
+    end
+  end
+end
+local variabletags={
+  hasc=function(data,d) setmetrics(data,"windowsmetrics","typoascender",d) end,
+  hdsc=function(data,d) setmetrics(data,"windowsmetrics","typodescender",d) end,
+  hlgp=function(data,d) setmetrics(data,"windowsmetrics","typolinegap",d) end,
+  hcla=function(data,d) setmetrics(data,"windowsmetrics","winascent",d) end,
+  hcld=function(data,d) setmetrics(data,"windowsmetrics","windescent",d) end,
+  vasc=function(data,d) setmetrics(data,"vhea not done","ascent",d) end,
+  vdsc=function(data,d) setmetrics(data,"vhea not done","descent",d) end,
+  vlgp=function(data,d) setmetrics(data,"vhea not done","linegap",d) end,
+  xhgt=function(data,d) setmetrics(data,"windowsmetrics","xheight",d) end,
+  cpht=function(data,d) setmetrics(data,"windowsmetrics","capheight",d) end,
+  sbxs=function(data,d) setmetrics(data,"windowsmetrics","subscriptxsize",d) end,
+  sbys=function(data,d) setmetrics(data,"windowsmetrics","subscriptysize",d) end,
+  sbxo=function(data,d) setmetrics(data,"windowsmetrics","subscriptxoffset",d) end,
+  sbyo=function(data,d) setmetrics(data,"windowsmetrics","subscriptyoffset",d) end,
+  spxs=function(data,d) setmetrics(data,"windowsmetrics","superscriptxsize",d) end,
+  spys=function(data,d) setmetrics(data,"windowsmetrics","superscriptysize",d) end,
+  spxo=function(data,d) setmetrics(data,"windowsmetrics","superscriptxoffset",d) end,
+  spyo=function(data,d) setmetrics(data,"windowsmetrics","superscriptyoffset",d) end,
+  strs=function(data,d) setmetrics(data,"windowsmetrics","strikeoutsize",d) end,
+  stro=function(data,d) setmetrics(data,"windowsmetrics","strikeoutpos",d) end,
+  unds=function(data,d) setmetrics(data,"postscript","underlineposition",d) end,
+  undo=function(data,d) setmetrics(data,"postscript","underlinethickness",d) end,
+}
+local read_cardinal={
+  streamreader.readcardinal1,
+  streamreader.readcardinal2,
+  streamreader.readcardinal3,
+  streamreader.readcardinal4,
+}
+local read_integer={
+  streamreader.readinteger1,
+  streamreader.readinteger2,
+  streamreader.readinteger3,
+  streamreader.readinteger4,
+}
+local lookupnames={
+  gsub={
+    single="gsub_single",
+    multiple="gsub_multiple",
+    alternate="gsub_alternate",
+    ligature="gsub_ligature",
+    context="gsub_context",
+    chainedcontext="gsub_contextchain",
+    reversechainedcontextsingle="gsub_reversecontextchain",
+  },
+  gpos={
+    single="gpos_single",
+    pair="gpos_pair",
+    cursive="gpos_cursive",
+    marktobase="gpos_mark2base",
+    marktoligature="gpos_mark2ligature",
+    marktomark="gpos_mark2mark",
+    context="gpos_context",
+    chainedcontext="gpos_contextchain",
+  }
+}
+local lookupflags=setmetatableindex(function(t,k)
+  local v={
+    bittest(k,0x0008) and true or false,
+    bittest(k,0x0004) and true or false,
+    bittest(k,0x0002) and true or false,
+    bittest(k,0x0001) and true or false,
+  }
+  t[k]=v
+  return v
+end)
+local pattern=lpeg.Cf (
+  lpeg.Ct("")*lpeg.Cg (
+    lpeg.C((lpeg.R("az","09")+lpeg.P(" "))^1)*lpeg.S(" :=")*(lpeg.patterns.number/tonumber)*lpeg.S(" ,")^0
+  )^1,rawset
+)
+local hash=table.setmetatableindex(function(t,k)
+  local v=lpegmatch(pattern,k)
+  local t={}
+  for k,v in sortedhash(v) do
+    t[#t+1]=k.."="..v
+  end
+  v=concat(t,",")
+  t[k]=v
+  return v
+end)
+helpers.normalizedaxishash=hash
+local cleanname=fonts.names and fonts.names.cleanname or function(name)
+  return name and (gsub(lower(name),"[^%a%d]","")) or nil
+end
+helpers.cleanname=cleanname
+function helpers.normalizedaxis(str)
+  return hash[str] or str
+end
+local function axistofactors(str)
+  return lpegmatch(pattern,str)
+end
+local function getaxisscale(segments,minimum,default,maximum,user)
+  if not minimum or not default or not maximum then
+    return false
+  end
+  if user<minimum then
+    user=minimum
+  elseif user>maximum then
+    user=maximum
+  end
+  if user<default then
+    default=- (default-user)/(default-minimum)
+  elseif user>default then
+    default=(user-default)/(maximum-default)
+  else
+    default=0
+  end
+  if not segments then
+    return default
+  end
+  local e
+  for i=1,#segments do
+    local s=segments[i]
+    if type(s)~="number" then
+      report("using default axis scale")
+      return default
+    elseif s[1]>=default then
+      if s[2]==default then
+        return default
+      else
+        e=i
+        break
+      end
+    end
+  end
+  if e then
+    local b=segments[e-1]
+    local e=segments[e]
+    return b[2]+(e[2]-b[2])*(default-b[1])/(e[1]-b[1])
+  else
+    return false
+  end
+end
+local function getfactors(data,instancespec)
+  if instancespec==true then
+  elseif type(instancespec)~="string" or instancespec=="" then
+    return
+  end
+  local variabledata=data.variabledata
+  if not variabledata then
+    return
+  end
+  local instances=variabledata.instances
+  local axis=variabledata.axis
+  local segments=variabledata.segments
+  if instances and axis then
+    local values
+    if instancespec==true then
+      values={}
+      for i=1,#axis do
+        values[i]={
+          value=axis[i].default,
+        }
+      end
+    else
+      for i=1,#instances do
+        local instance=instances[i]
+        if cleanname(instance.subfamily)==instancespec then
+          values=instance.values
+          break
+        end
+      end
+    end
+    if values then
+      local factors={}
+      for i=1,#axis do
+        local a=axis[i]
+        factors[i]=getaxisscale(segments,a.minimum,a.default,a.maximum,values[i].value)
+      end
+      return factors
+    end
+    local values=axistofactors(hash[instancespec] or instancespec)
+    if values then
+      local factors={}
+      for i=1,#axis do
+        local a=axis[i]
+        local d=a.default
+        factors[i]=getaxisscale(segments,a.minimum,d,a.maximum,values[a.name or a.tag] or d)
+      end
+      return factors
+    end
+  end
+end
+local function getscales(regions,factors)
+  local scales={}
+  for i=1,#regions do
+    local region=regions[i]
+    local s=1
+    for j=1,#region do
+      local axis=region[j]
+      local f=factors[j]
+      local start=axis.start
+      local peak=axis.peak
+      local stop=axis.stop
+      if start>peak or peak>stop then
+      elseif start<0 and stop>0 and peak~=0 then
+      elseif peak==0 then
+      elseif f<start or f>stop then
+        s=0
+        break
+      elseif f<peak then
+        s=s*(f-start)/(peak-start)
+      elseif f>peak then
+        s=s*(stop-f)/(stop-peak)
+      else
+      end
+    end
+    scales[i]=s
+  end
+  return scales
+end
+helpers.getaxisscale=getaxisscale
+helpers.getfactors=getfactors
+helpers.getscales=getscales
+helpers.axistofactors=axistofactors
+local function readvariationdata(f,storeoffset,factors) 
+  local position=getposition(f)
+  setposition(f,storeoffset)
+  local format=readushort(f)
+  local regionoffset=storeoffset+readulong(f)
+  local nofdeltadata=readushort(f)
+  local deltadata={}
+  for i=1,nofdeltadata do
+    deltadata[i]=readulong(f)
+  end
+  setposition(f,regionoffset)
+  local nofaxis=readushort(f)
+  local nofregions=readushort(f)
+  local regions={}
+  for i=1,nofregions do 
+    local t={}
+    for i=1,nofaxis do
+      t[i]={ 
+        start=read2dot14(f),
+        peak=read2dot14(f),
+        stop=read2dot14(f),
+      }
+    end
+    regions[i]=t
+  end
+  if factors then
+    for i=1,nofdeltadata do
+      setposition(f,storeoffset+deltadata[i])
+      local nofdeltasets=readushort(f)
+      local nofshorts=readushort(f)
+      local nofregions=readushort(f)
+      local usedregions={}
+      local deltas={}
+      for i=1,nofregions do
+        usedregions[i]=regions[readushort(f)+1]
+      end
+      for i=1,nofdeltasets do
+        local t={} 
+        for i=1,nofshorts do
+          t[i]=readshort(f)
+        end
+        for i=nofshorts+1,nofregions do
+          t[i]=readinteger(f)
+        end
+        deltas[i]=t
+      end
+      deltadata[i]={
+        regions=usedregions,
+        deltas=deltas,
+        scales=factors and getscales(usedregions,factors) or nil,
+      }
+    end
+  end
+  setposition(f,position)
+  return regions,deltadata
+end
+helpers.readvariationdata=readvariationdata
+local function readcoverage(f,offset,simple)
+  setposition(f,offset)
+  local coverageformat=readushort(f)
+  local coverage={}
+  if coverageformat==1 then
+    local nofcoverage=readushort(f)
+    if simple then
+      for i=1,nofcoverage do
+        coverage[i]=readushort(f)
+      end
+    else
+      for i=0,nofcoverage-1 do
+        coverage[readushort(f)]=i 
+      end
+    end
+  elseif coverageformat==2 then
+    local nofranges=readushort(f)
+    local n=simple and 1 or 0 
+    for i=1,nofranges do
+      local firstindex=readushort(f)
+      local lastindex=readushort(f)
+      local coverindex=readushort(f)
+      if simple then
+        for i=firstindex,lastindex do
+          coverage[n]=i
+          n=n+1
+        end
+      else
+        for i=firstindex,lastindex do
+          coverage[i]=n
+          n=n+1
+        end
+      end
+    end
+  else
+    report("unknown coverage format %a ",coverageformat)
+  end
+  return coverage
+end
+local function readclassdef(f,offset,preset)
+  setposition(f,offset)
+  local classdefformat=readushort(f)
+  local classdef={}
+  if type(preset)=="number" then
+    for k=0,preset-1 do
+      classdef[k]=1
+    end
+  end
+  if classdefformat==1 then
+    local index=readushort(f)
+    local nofclassdef=readushort(f)
+    for i=1,nofclassdef do
+      classdef[index]=readushort(f)+1
+      index=index+1
+    end
+  elseif classdefformat==2 then
+    local nofranges=readushort(f)
+    local n=0
+    for i=1,nofranges do
+      local firstindex=readushort(f)
+      local lastindex=readushort(f)
+      local class=readushort(f)+1
+      for i=firstindex,lastindex do
+        classdef[i]=class
+      end
+    end
+  else
+    report("unknown classdef format %a ",classdefformat)
+  end
+  if type(preset)=="table" then
+    for k in next,preset do
+      if not classdef[k] then
+        classdef[k]=1
+      end
+    end
+  end
+  return classdef
+end
+local function classtocoverage(defs)
+  if defs then
+    local list={}
+    for index,class in next,defs do
+      local c=list[class]
+      if c then
+        c[#c+1]=index
+      else
+        list[class]={ index }
+      end
+    end
+    return list
+  end
+end
+local skips={ [0]=0,
+  1,
+  1,
+  2,
+  1,
+  2,
+  2,
+  3,
+  2,
+  2,
+  3,
+  2,
+  3,
+  3,
+  4,
+}
+local function readvariation(f,offset)
+  local p=getposition(f)
+  setposition(f,offset)
+  local outer=readushort(f)
+  local inner=readushort(f)
+  local format=readushort(f)
+  setposition(f,p)
+  if format==0x8000 then
+    return outer,inner
+  end
+end
+local function readposition(f,format,mainoffset,getdelta)
+  if format==0 then
+    return false
+  end
+  if format==0x04 then
+    local h=readshort(f)
+    if h==0 then
+      return true 
+    else
+      return { 0,0,h,0 }
+    end
+  end
+  if format==0x05 then
+    local x=readshort(f)
+    local h=readshort(f)
+    if x==0 and h==0 then
+      return true 
+    else
+      return { x,0,h,0 }
+    end
+  end
+  if format==0x44 then
+    local h=readshort(f)
+    if getdelta then
+      local d=readshort(f) 
+      if d>0 then
+        local outer,inner=readvariation(f,mainoffset+d)
+        if outer then
+          h=h+getdelta(outer,inner)
+        end
+      end
+    else
+      skipshort(f,1)
+    end
+    if h==0 then
+      return true 
+    else
+      return { 0,0,h,0 }
+    end
+  end
+  local x=bittest(format,0x01) and readshort(f) or 0 
+  local y=bittest(format,0x02) and readshort(f) or 0 
+  local h=bittest(format,0x04) and readshort(f) or 0 
+  local v=bittest(format,0x08) and readshort(f) or 0 
+  if format>=0x10 then
+    local X=bittest(format,0x10) and skipshort(f) or 0
+    local Y=bittest(format,0x20) and skipshort(f) or 0
+    local H=bittest(format,0x40) and skipshort(f) or 0
+    local V=bittest(format,0x80) and skipshort(f) or 0
+    local s=skips[extract(format,4,4)]
+    if s>0 then
+      skipshort(f,s)
+    end
+    if getdelta then
+      if X>0 then
+        local outer,inner=readvariation(f,mainoffset+X)
+        if outer then
+          x=x+getdelta(outer,inner)
+        end
+      end
+      if Y>0 then
+        local outer,inner=readvariation(f,mainoffset+Y)
+        if outer then
+          y=y+getdelta(outer,inner)
+        end
+      end
+      if H>0 then
+        local outer,inner=readvariation(f,mainoffset+H)
+        if outer then
+          h=h+getdelta(outer,inner)
+        end
+      end
+      if V>0 then
+        local outer,inner=readvariation(f,mainoffset+V)
+        if outer then
+          v=v+getdelta(outer,inner)
+        end
+      end
+    end
+    return { x,y,h,v }
+  elseif x==0 and y==0 and h==0 and v==0 then
+    return true 
+  else
+    return { x,y,h,v }
+  end
+end
+local function readanchor(f,offset,getdelta) 
+  if not offset or offset==0 then
+    return nil 
+  end
+  setposition(f,offset)
+  local format=readshort(f) 
+  local x=readshort(f)
+  local y=readshort(f)
+  if format==3 then
+    if getdelta then
+      local X=readshort(f)
+      local Y=readshort(f)
+      if X>0 then
+        local outer,inner=readvariation(f,offset+X)
+        if outer then
+          x=x+getdelta(outer,inner)
+        end
+      end
+      if Y>0 then
+        local outer,inner=readvariation(f,offset+Y)
+        if outer then
+          y=y+getdelta(outer,inner)
+        end
+      end
+    else
+      skipshort(f,2)
+    end
+    return { x,y } 
+  else
+    return { x,y }
+  end
+end
+local function readfirst(f,offset)
+  if offset then
+    setposition(f,offset)
+  end
+  return { readushort(f) }
+end
+local function readarray(f,offset,first)
+  if offset then
+    setposition(f,offset)
+  end
+  local n=readushort(f)
+  if first then
+    local t={ first }
+    for i=2,n do
+      t[i]=readushort(f)
+    end
+    return t,n
+  elseif n>0 then
+    local t={}
+    for i=1,n do
+      t[i]=readushort(f)
+    end
+    return t,n
+  end
+end
+local function readcoveragearray(f,offset,t,simple)
+  if not t then
+    return nil
+  end
+  local n=#t
+  if n==0 then
+    return nil
+  end
+  for i=1,n do
+    t[i]=readcoverage(f,offset+t[i],simple)
+  end
+  return t
+end
+local function covered(subset,all)
+  local used,u
+  for i=1,#subset do
+    local s=subset[i]
+    if all[s] then
+      if used then
+        u=u+1
+        used[u]=s
+      else
+        u=1
+        used={ s }
+      end
+    end
+  end
+  return used
+end
+local function readlookuparray(f,noflookups,nofcurrent)
+  local lookups={}
+  if noflookups>0 then
+    local length=0
+    for i=1,noflookups do
+      local index=readushort(f)+1
+      if index>length then
+        length=index
+      end
+      local lookup=readushort(f)+1
+      local list=lookups[index]
+      if list then
+        list[#list+1]=lookup
+      else
+        lookups[index]={ lookup }
+      end
+    end
+    for index=1,length do
+      if not lookups[index] then
+        lookups[index]=false
+      end
+    end
+  end
+  return lookups
+end
+local function unchainedcontext(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,what)
+  local tableoffset=lookupoffset+offset
+  setposition(f,tableoffset)
+  local subtype=readushort(f)
+  if subtype==1 then
+    local coverage=readushort(f)
+    local subclasssets=readarray(f)
+    local rules={}
+    if subclasssets then
+      coverage=readcoverage(f,tableoffset+coverage,true)
+      for i=1,#subclasssets do
+        local offset=subclasssets[i]
+        if offset>0 then
+          local firstcoverage=coverage[i]
+          local rulesoffset=tableoffset+offset
+          local subclassrules=readarray(f,rulesoffset)
+          for rule=1,#subclassrules do
+            setposition(f,rulesoffset+subclassrules[rule])
+            local nofcurrent=readushort(f)
+            local noflookups=readushort(f)
+            local current={ { firstcoverage } }
+            for i=2,nofcurrent do
+              current[i]={ readushort(f) }
+            end
+            local lookups=readlookuparray(f,noflookups,nofcurrent)
+            rules[#rules+1]={
+              current=current,
+              lookups=lookups
+            }
+          end
+        end
+      end
+    else
+      report("empty subclassset in %a subtype %i","unchainedcontext",subtype)
+    end
+    return {
+      format="glyphs",
+      rules=rules,
+    }
+  elseif subtype==2 then
+    local coverage=readushort(f)
+    local currentclassdef=readushort(f)
+    local subclasssets=readarray(f)
+    local rules={}
+    if subclasssets then
+      coverage=readcoverage(f,tableoffset+coverage)
+      currentclassdef=readclassdef(f,tableoffset+currentclassdef,coverage)
+      local currentclasses=classtocoverage(currentclassdef,fontdata.glyphs)
+      for class=1,#subclasssets do
+        local offset=subclasssets[class]
+        if offset>0 then
+          local firstcoverage=currentclasses[class]
+          if firstcoverage then
+            firstcoverage=covered(firstcoverage,coverage) 
+            if firstcoverage then
+              local rulesoffset=tableoffset+offset
+              local subclassrules=readarray(f,rulesoffset)
+              for rule=1,#subclassrules do
+                setposition(f,rulesoffset+subclassrules[rule])
+                local nofcurrent=readushort(f)
+                local noflookups=readushort(f)
+                local current={ firstcoverage }
+                for i=2,nofcurrent do
+                  current[i]=currentclasses[readushort(f)+1]
+                end
+                local lookups=readlookuparray(f,noflookups,nofcurrent)
+                rules[#rules+1]={
+                  current=current,
+                  lookups=lookups
+                }
+              end
+            else
+              report("no coverage")
+            end
+          else
+            report("no coverage class")
+          end
+        end
+      end
+    else
+      report("empty subclassset in %a subtype %i","unchainedcontext",subtype)
+    end
+    return {
+      format="class",
+      rules=rules,
+    }
+  elseif subtype==3 then
+    local current=readarray(f)
+    local noflookups=readushort(f)
+    local lookups=readlookuparray(f,noflookups,#current)
+    current=readcoveragearray(f,tableoffset,current,true)
+    return {
+      format="coverage",
+      rules={
+        {
+          current=current,
+          lookups=lookups,
+        }
+      }
+    }
+  else
+    report("unsupported subtype %a in %a %s",subtype,"unchainedcontext",what)
+  end
+end
+local function chainedcontext(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,what)
+  local tableoffset=lookupoffset+offset
+  setposition(f,tableoffset)
+  local subtype=readushort(f)
+  if subtype==1 then
+    local coverage=readushort(f)
+    local subclasssets=readarray(f)
+    local rules={}
+    if subclasssets then
+      coverage=readcoverage(f,tableoffset+coverage,true)
+      for i=1,#subclasssets do
+        local offset=subclasssets[i]
+        if offset>0 then
+          local firstcoverage=coverage[i]
+          local rulesoffset=tableoffset+offset
+          local subclassrules=readarray(f,rulesoffset)
+          for rule=1,#subclassrules do
+            setposition(f,rulesoffset+subclassrules[rule])
+            local nofbefore=readushort(f)
+            local before
+            if nofbefore>0 then
+              before={}
+              for i=1,nofbefore do
+                before[i]={ readushort(f) }
+              end
+            end
+            local nofcurrent=readushort(f)
+            local current={ { firstcoverage } }
+            for i=2,nofcurrent do
+              current[i]={ readushort(f) }
+            end
+            local nofafter=readushort(f)
+            local after
+            if nofafter>0 then
+              after={}
+              for i=1,nofafter do
+                after[i]={ readushort(f) }
+              end
+            end
+            local noflookups=readushort(f)
+            local lookups=readlookuparray(f,noflookups,nofcurrent)
+            rules[#rules+1]={
+              before=before,
+              current=current,
+              after=after,
+              lookups=lookups,
+            }
+          end
+        end
+      end
+    else
+      report("empty subclassset in %a subtype %i","chainedcontext",subtype)
+    end
+    return {
+      format="glyphs",
+      rules=rules,
+    }
+  elseif subtype==2 then
+    local coverage=readushort(f)
+    local beforeclassdef=readushort(f)
+    local currentclassdef=readushort(f)
+    local afterclassdef=readushort(f)
+    local subclasssets=readarray(f)
+    local rules={}
+    if subclasssets then
+      local coverage=readcoverage(f,tableoffset+coverage)
+      local beforeclassdef=readclassdef(f,tableoffset+beforeclassdef,nofglyphs)
+      local currentclassdef=readclassdef(f,tableoffset+currentclassdef,coverage)
+      local afterclassdef=readclassdef(f,tableoffset+afterclassdef,nofglyphs)
+      local beforeclasses=classtocoverage(beforeclassdef,fontdata.glyphs)
+      local currentclasses=classtocoverage(currentclassdef,fontdata.glyphs)
+      local afterclasses=classtocoverage(afterclassdef,fontdata.glyphs)
+      for class=1,#subclasssets do
+        local offset=subclasssets[class]
+        if offset>0 then
+          local firstcoverage=currentclasses[class]
+          if firstcoverage then
+            firstcoverage=covered(firstcoverage,coverage) 
+            if firstcoverage then
+              local rulesoffset=tableoffset+offset
+              local subclassrules=readarray(f,rulesoffset)
+              for rule=1,#subclassrules do
+                setposition(f,rulesoffset+subclassrules[rule])
+                local nofbefore=readushort(f)
+                local before
+                if nofbefore>0 then
+                  before={}
+                  for i=1,nofbefore do
+                    before[i]=beforeclasses[readushort(f)+1]
+                  end
+                end
+                local nofcurrent=readushort(f)
+                local current={ firstcoverage }
+                for i=2,nofcurrent do
+                  current[i]=currentclasses[readushort(f)+1]
+                end
+                local nofafter=readushort(f)
+                local after
+                if nofafter>0 then
+                  after={}
+                  for i=1,nofafter do
+                    after[i]=afterclasses[readushort(f)+1]
+                  end
+                end
+                local noflookups=readushort(f)
+                local lookups=readlookuparray(f,noflookups,nofcurrent)
+                rules[#rules+1]={
+                  before=before,
+                  current=current,
+                  after=after,
+                  lookups=lookups,
+                }
+              end
+            else
+              report("no coverage")
+            end
+          else
+            report("class is not covered")
+          end
+        end
+      end
+    else
+      report("empty subclassset in %a subtype %i","chainedcontext",subtype)
+    end
+    return {
+      format="class",
+      rules=rules,
+    }
+  elseif subtype==3 then
+    local before=readarray(f)
+    local current=readarray(f)
+    local after=readarray(f)
+    local noflookups=readushort(f)
+    local lookups=readlookuparray(f,noflookups,#current)
+    before=readcoveragearray(f,tableoffset,before,true)
+    current=readcoveragearray(f,tableoffset,current,true)
+    after=readcoveragearray(f,tableoffset,after,true)
+    return {
+      format="coverage",
+      rules={
+        {
+          before=before,
+          current=current,
+          after=after,
+          lookups=lookups,
+        }
+      }
+    }
+  else
+    report("unsupported subtype %a in %a %s",subtype,"chainedcontext",what)
+  end
+end
+local function extension(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,types,handlers,what)
+  local tableoffset=lookupoffset+offset
+  setposition(f,tableoffset)
+  local subtype=readushort(f)
+  if subtype==1 then
+    local lookuptype=types[readushort(f)]
+    local faroffset=readulong(f)
+    local handler=handlers[lookuptype]
+    if handler then
+      return handler(f,fontdata,lookupid,tableoffset+faroffset,0,glyphs,nofglyphs),lookuptype
+    else
+      report("no handler for lookuptype %a subtype %a in %s %s",lookuptype,subtype,what,"extension")
+    end
+  else
+    report("unsupported subtype %a in %s %s",subtype,what,"extension")
+  end
+end
+function gsubhandlers.single(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  local tableoffset=lookupoffset+offset
+  setposition(f,tableoffset)
+  local subtype=readushort(f)
+  if subtype==1 then
+    local coverage=readushort(f)
+    local delta=readshort(f) 
+    local coverage=readcoverage(f,tableoffset+coverage) 
+    for index in next,coverage do
+      local newindex=index+delta
+      if index>nofglyphs or newindex>nofglyphs then
+        report("invalid index in %s format %i: %i -> %i (max %i)","single",subtype,index,newindex,nofglyphs)
+        coverage[index]=nil
+      else
+        coverage[index]=newindex
+      end
+    end
+    return {
+      coverage=coverage
+    }
+  elseif subtype==2 then 
+    local coverage=readushort(f)
+    local nofreplacements=readushort(f)
+    local replacements={}
+    for i=1,nofreplacements do
+      replacements[i]=readushort(f)
+    end
+    local coverage=readcoverage(f,tableoffset+coverage) 
+    for index,newindex in next,coverage do
+      newindex=newindex+1
+      if index>nofglyphs or newindex>nofglyphs then
+        report("invalid index in %s format %i: %i -> %i (max %i)","single",subtype,index,newindex,nofglyphs)
+        coverage[index]=nil
+      else
+        coverage[index]=replacements[newindex]
+      end
+    end
+    return {
+      coverage=coverage
+    }
+  else
+    report("unsupported subtype %a in %a substitution",subtype,"single")
+  end
+end
+local function sethandler(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,what)
+  local tableoffset=lookupoffset+offset
+  setposition(f,tableoffset)
+  local subtype=readushort(f)
+  if subtype==1 then
+    local coverage=readushort(f)
+    local nofsequence=readushort(f)
+    local sequences={}
+    for i=1,nofsequence do
+      sequences[i]=readushort(f)
+    end
+    for i=1,nofsequence do
+      setposition(f,tableoffset+sequences[i])
+      local n=readushort(f)
+      local s={}
+      for i=1,n do
+        s[i]=readushort(f)
+      end
+      sequences[i]=s
+    end
+    local coverage=readcoverage(f,tableoffset+coverage)
+    for index,newindex in next,coverage do
+      newindex=newindex+1
+      if index>nofglyphs or newindex>nofglyphs then
+        report("invalid index in %s format %i: %i -> %i (max %i)",what,subtype,index,newindex,nofglyphs)
+        coverage[index]=nil
+      else
+        coverage[index]=sequences[newindex]
+      end
+    end
+    return {
+      coverage=coverage
+    }
+  else
+    report("unsupported subtype %a in %a substitution",subtype,what)
+  end
+end
+function gsubhandlers.multiple(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  return sethandler(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,"multiple")
+end
+function gsubhandlers.alternate(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  return sethandler(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,"alternate")
+end
+function gsubhandlers.ligature(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  local tableoffset=lookupoffset+offset
+  setposition(f,tableoffset)
+  local subtype=readushort(f)
+  if subtype==1 then
+    local coverage=readushort(f)
+    local nofsets=readushort(f)
+    local ligatures={}
+    for i=1,nofsets do
+      ligatures[i]=readushort(f)
+    end
+    for i=1,nofsets do
+      local offset=lookupoffset+offset+ligatures[i]
+      setposition(f,offset)
+      local n=readushort(f)
+      local l={}
+      for i=1,n do
+        l[i]=offset+readushort(f)
+      end
+      ligatures[i]=l
+    end
+    local coverage=readcoverage(f,tableoffset+coverage)
+    for index,newindex in next,coverage do
+      local hash={}
+      local ligatures=ligatures[newindex+1]
+      for i=1,#ligatures do
+        local offset=ligatures[i]
+        setposition(f,offset)
+        local lig=readushort(f)
+        local cnt=readushort(f)
+        local hsh=hash
+        for i=2,cnt do
+          local c=readushort(f)
+          local h=hsh[c]
+          if not h then
+            h={}
+            hsh[c]=h
+          end
+          hsh=h
+        end
+        hsh.ligature=lig
+      end
+      coverage[index]=hash
+    end
+    return {
+      coverage=coverage
+    }
+  else
+    report("unsupported subtype %a in %a substitution",subtype,"ligature")
+  end
+end
+function gsubhandlers.context(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  return unchainedcontext(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,"substitution"),"context"
+end
+function gsubhandlers.chainedcontext(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  return chainedcontext(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,"substitution"),"chainedcontext"
+end
+function gsubhandlers.extension(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  return extension(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,gsubtypes,gsubhandlers,"substitution")
+end
+function gsubhandlers.reversechainedcontextsingle(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  local tableoffset=lookupoffset+offset
+  setposition(f,tableoffset)
+  local subtype=readushort(f)
+  if subtype==1 then 
+    local current=readfirst(f)
+    local before=readarray(f)
+    local after=readarray(f)
+    local replacements=readarray(f)
+    current=readcoveragearray(f,tableoffset,current,true)
+    before=readcoveragearray(f,tableoffset,before,true)
+    after=readcoveragearray(f,tableoffset,after,true)
+    return {
+      format="reversecoverage",
+      rules={
+        {
+          before=before,
+          current=current,
+          after=after,
+          replacements=replacements,
+        }
+      }
+    },"reversechainedcontextsingle"
+  else
+    report("unsupported subtype %a in %a substitution",subtype,"reversechainedcontextsingle")
+  end
+end
+local function readpairsets(f,tableoffset,sets,format1,format2,mainoffset,getdelta)
+  local done={}
+  for i=1,#sets do
+    local offset=sets[i]
+    local reused=done[offset]
+    if not reused then
+      offset=tableoffset+offset
+      setposition(f,offset)
+      local n=readushort(f)
+      reused={}
+      for i=1,n do
+        reused[i]={
+          readushort(f),
+          readposition(f,format1,offset,getdelta),
+          readposition(f,format2,offset,getdelta),
+        }
+      end
+      done[offset]=reused
+    end
+    sets[i]=reused
+  end
+  return sets
+end
+local function readpairclasssets(f,nofclasses1,nofclasses2,format1,format2,mainoffset,getdelta)
+  local classlist1={}
+  for i=1,nofclasses1 do
+    local classlist2={}
+    classlist1[i]=classlist2
+    for j=1,nofclasses2 do
+      local one=readposition(f,format1,mainoffset,getdelta)
+      local two=readposition(f,format2,mainoffset,getdelta)
+      if one or two then
+        classlist2[j]={ one,two }
+      else
+        classlist2[j]=false
+      end
+    end
+  end
+  return classlist1
+end
+function gposhandlers.single(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  local tableoffset=lookupoffset+offset
+  setposition(f,tableoffset)
+  local subtype=readushort(f)
+  local getdelta=fontdata.temporary.getdelta
+  if subtype==1 then
+    local coverage=readushort(f)
+    local format=readushort(f)
+    local value=readposition(f,format,tableoffset,getdelta)
+    local coverage=readcoverage(f,tableoffset+coverage)
+    for index,newindex in next,coverage do
+      coverage[index]=value 
+    end
+    return {
+      format="single",
+      coverage=coverage,
+    }
+  elseif subtype==2 then
+    local coverage=readushort(f)
+    local format=readushort(f)
+    local nofvalues=readushort(f)
+    local values={}
+    for i=1,nofvalues do
+      values[i]=readposition(f,format,tableoffset,getdelta)
+    end
+    local coverage=readcoverage(f,tableoffset+coverage)
+    for index,newindex in next,coverage do
+      coverage[index]=values[newindex+1]
+    end
+    return {
+      format="single",
+      coverage=coverage,
+    }
+  else
+    report("unsupported subtype %a in %a positioning",subtype,"single")
+  end
+end
+function gposhandlers.pair(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  local tableoffset=lookupoffset+offset
+  setposition(f,tableoffset)
+  local subtype=readushort(f)
+  local getdelta=fontdata.temporary.getdelta
+  if subtype==1 then
+    local coverage=readushort(f)
+    local format1=readushort(f)
+    local format2=readushort(f)
+    local sets=readarray(f)
+       sets=readpairsets(f,tableoffset,sets,format1,format2,mainoffset,getdelta)
+       coverage=readcoverage(f,tableoffset+coverage)
+    for index,newindex in next,coverage do
+      local set=sets[newindex+1]
+      local hash={}
+      for i=1,#set do
+        local value=set[i]
+        if value then
+          local other=value[1]
+          local first=value[2]
+          local second=value[3]
+          if first or second then
+            hash[other]={ first,second or nil } 
+          else
+            hash[other]=nil 
+          end
+        end
+      end
+      coverage[index]=hash
+    end
+    return {
+      format="pair",
+      coverage=coverage,
+    }
+  elseif subtype==2 then
+    local coverage=readushort(f)
+    local format1=readushort(f)
+    local format2=readushort(f)
+    local classdef1=readushort(f)
+    local classdef2=readushort(f)
+    local nofclasses1=readushort(f) 
+    local nofclasses2=readushort(f) 
+    local classlist=readpairclasssets(f,nofclasses1,nofclasses2,format1,format2,tableoffset,getdelta)
+       coverage=readcoverage(f,tableoffset+coverage)
+       classdef1=readclassdef(f,tableoffset+classdef1,coverage)
+       classdef2=readclassdef(f,tableoffset+classdef2,nofglyphs)
+    local usedcoverage={}
+    for g1,c1 in next,classdef1 do
+      if coverage[g1] then
+        local l1=classlist[c1]
+        if l1 then
+          local hash={}
+          for paired,class in next,classdef2 do
+            local offsets=l1[class]
+            if offsets then
+              local first=offsets[1]
+              local second=offsets[2]
+              if first or second then
+                hash[paired]={ first,second or nil }
+              else
+              end
+            end
+          end
+          usedcoverage[g1]=hash
+        end
+      end
+    end
+    return {
+      format="pair",
+      coverage=usedcoverage,
+    }
+  elseif subtype==3 then
+    report("yet unsupported subtype %a in %a positioning",subtype,"pair")
+  else
+    report("unsupported subtype %a in %a positioning",subtype,"pair")
+  end
+end
+function gposhandlers.cursive(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  local tableoffset=lookupoffset+offset
+  setposition(f,tableoffset)
+  local subtype=readushort(f)
+  local getdelta=fontdata.temporary.getdelta
+  if subtype==1 then
+    local coverage=tableoffset+readushort(f)
+    local nofrecords=readushort(f)
+    local records={}
+    for i=1,nofrecords do
+      local entry=readushort(f)
+      local exit=readushort(f)
+      records[i]={
+        entry~=0 and (tableoffset+entry) or false,
+        exit~=0 and (tableoffset+exit ) or nil,
+      }
+    end
+    local cc=(fontdata.temporary.cursivecount or 0)+1
+    fontdata.temporary.cursivecount=cc
+    cc="cc-"..cc
+    coverage=readcoverage(f,coverage)
+    for i=1,nofrecords do
+      local r=records[i]
+      records[i]={
+        cc,
+        readanchor(f,r[1],getdelta) or false,
+        readanchor(f,r[2],getdelta) or nil,
+      }
+    end
+    for index,newindex in next,coverage do
+      coverage[index]=records[newindex+1]
+    end
+    return {
+      coverage=coverage,
+    }
+  else
+    report("unsupported subtype %a in %a positioning",subtype,"cursive")
+  end
+end
+local function handlemark(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,ligature)
+  local tableoffset=lookupoffset+offset
+  setposition(f,tableoffset)
+  local subtype=readushort(f)
+  local getdelta=fontdata.temporary.getdelta
+  if subtype==1 then
+    local markcoverage=tableoffset+readushort(f)
+    local basecoverage=tableoffset+readushort(f)
+    local nofclasses=readushort(f)
+    local markoffset=tableoffset+readushort(f)
+    local baseoffset=tableoffset+readushort(f)
+    local markcoverage=readcoverage(f,markcoverage)
+    local basecoverage=readcoverage(f,basecoverage,true)
+    setposition(f,markoffset)
+    local markclasses={}
+    local nofmarkclasses=readushort(f)
+    local lastanchor=fontdata.lastanchor or 0
+    local usedanchors={}
+    for i=1,nofmarkclasses do
+      local class=readushort(f)+1
+      local offset=readushort(f)
+      if offset==0 then
+        markclasses[i]=false
+      else
+        markclasses[i]={ class,markoffset+offset }
+      end
+      usedanchors[class]=true
+    end
+    for i=1,nofmarkclasses do
+      local mc=markclasses[i]
+      if mc then
+        mc[2]=readanchor(f,mc[2],getdelta)
+      end
+    end
+    setposition(f,baseoffset)
+    local nofbaserecords=readushort(f)
+    local baserecords={}
+    if ligature then
+      for i=1,nofbaserecords do 
+        local offset=readushort(f)
+        if offset==0 then
+          baserecords[i]=false
+        else
+          baserecords[i]=baseoffset+offset
+        end
+      end
+      for i=1,nofbaserecords do
+        local recordoffset=baserecords[i]
+        if recordoffset then
+          setposition(f,recordoffset)
+          local nofcomponents=readushort(f)
+          local components={}
+          for i=1,nofcomponents do
+            local classes={}
+            for i=1,nofclasses do
+              local offset=readushort(f)
+              if offset~=0 then
+                classes[i]=recordoffset+offset
+              else
+                classes[i]=false
+              end
+            end
+            components[i]=classes
+          end
+          baserecords[i]=components
+        end
+      end
+      local baseclasses={} 
+      for i=1,nofclasses do
+        baseclasses[i]={}
+      end
+      for i=1,nofbaserecords do
+        local components=baserecords[i]
+        if components then
+          local b=basecoverage[i]
+          for c=1,#components do
+            local classes=components[c]
+            if classes then
+              for i=1,nofclasses do
+                local anchor=readanchor(f,classes[i],getdelta)
+                local bclass=baseclasses[i]
+                local bentry=bclass[b]
+                if bentry then
+                  bentry[c]=anchor
+                else
+                  bclass[b]={ [c]=anchor }
+                end
+              end
+            end
+          end
+        end
+      end
+      for index,newindex in next,markcoverage do
+        markcoverage[index]=markclasses[newindex+1] or nil
+      end
+      return {
+        format="ligature",
+        baseclasses=baseclasses,
+        coverage=markcoverage,
+      }
+    else
+      for i=1,nofbaserecords do
+        local r={}
+        for j=1,nofclasses do
+          local offset=readushort(f)
+          if offset==0 then
+            r[j]=false
+          else
+            r[j]=baseoffset+offset
+          end
+        end
+        baserecords[i]=r
+      end
+      local baseclasses={} 
+      for i=1,nofclasses do
+        baseclasses[i]={}
+      end
+      for i=1,nofbaserecords do
+        local r=baserecords[i]
+        local b=basecoverage[i]
+        for j=1,nofclasses do
+          baseclasses[j][b]=readanchor(f,r[j],getdelta)
+        end
+      end
+      for index,newindex in next,markcoverage do
+        markcoverage[index]=markclasses[newindex+1] or nil
+      end
+      return {
+        format="base",
+        baseclasses=baseclasses,
+        coverage=markcoverage,
+      }
+    end
+  else
+    report("unsupported subtype %a in",subtype)
+  end
+end
+function gposhandlers.marktobase(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  return handlemark(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+end
+function gposhandlers.marktoligature(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  return handlemark(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,true)
+end
+function gposhandlers.marktomark(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  return handlemark(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+end
+function gposhandlers.context(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  return unchainedcontext(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,"positioning"),"context"
+end
+function gposhandlers.chainedcontext(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  return chainedcontext(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,"positioning"),"chainedcontext"
+end
+function gposhandlers.extension(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs)
+  return extension(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs,gpostypes,gposhandlers,"positioning")
+end
+do
+  local plugins={}
+  function plugins.size(f,fontdata,tableoffset,feature)
+    if fontdata.designsize then
+    else
+      local function check(offset)
+        setposition(f,offset)
+        local designsize=readushort(f)
+        if designsize>0 then 
+          local fontstyleid=readushort(f)
+          local guimenuid=readushort(f)
+          local minsize=readushort(f)
+          local maxsize=readushort(f)
+          if minsize==0 and maxsize==0 and fontstyleid==0 and guimenuid==0 then
+            minsize=designsize
+            maxsize=designsize
+          end
+          if designsize>=minsize and designsize<=maxsize then
+            return minsize,maxsize,designsize
+          end
+        end
+      end
+      local minsize,maxsize,designsize=check(tableoffset+feature.offset+feature.parameters)
+      if not designsize then
+        minsize,maxsize,designsize=check(tableoffset+feature.parameters)
+        if designsize then
+          report("bad size feature in %a, falling back to wrong offset",fontdata.filename or "?")
+        else
+          report("bad size feature in %a,",fontdata.filename or "?")
+        end
+      end
+      if designsize then
+        fontdata.minsize=minsize
+        fontdata.maxsize=maxsize
+        fontdata.designsize=designsize
+      end
+    end
+  end
+  local function reorderfeatures(fontdata,scripts,features)
+    local scriptlangs={}
+    local featurehash={}
+    local featureorder={}
+    for script,languages in next,scripts do
+      for language,record in next,languages do
+        local hash={}
+        local list=record.featureindices
+        for k=1,#list do
+          local index=list[k]
+          local feature=features[index]
+          local lookups=feature.lookups
+          local tag=feature.tag
+          if tag then
+            hash[tag]=true
+          end
+          if lookups then
+            for i=1,#lookups do
+              local lookup=lookups[i]
+              local o=featureorder[lookup]
+              if o then
+                local okay=true
+                for i=1,#o do
+                  if o[i]==tag then
+                    okay=false
+                    break
+                  end
+                end
+                if okay then
+                  o[#o+1]=tag
+                end
+              else
+                featureorder[lookup]={ tag }
+              end
+              local f=featurehash[lookup]
+              if f then
+                local h=f[tag]
+                if h then
+                  local s=h[script]
+                  if s then
+                    s[language]=true
+                  else
+                    h[script]={ [language]=true }
+                  end
+                else
+                  f[tag]={ [script]={ [language]=true } }
+                end
+              else
+                featurehash[lookup]={ [tag]={ [script]={ [language]=true } } }
+              end
+              local h=scriptlangs[tag]
+              if h then
+                local s=h[script]
+                if s then
+                  s[language]=true
+                else
+                  h[script]={ [language]=true }
+                end
+              else
+                scriptlangs[tag]={ [script]={ [language]=true } }
+              end
+            end
+          end
+        end
+      end
+    end
+    return scriptlangs,featurehash,featureorder
+  end
+  local function readscriplan(f,fontdata,scriptoffset)
+    setposition(f,scriptoffset)
+    local nofscripts=readushort(f)
+    local scripts={}
+    for i=1,nofscripts do
+      scripts[readtag(f)]=scriptoffset+readushort(f)
+    end
+    local languagesystems=setmetatableindex("table")
+    for script,offset in next,scripts do
+      setposition(f,offset)
+      local defaultoffset=readushort(f)
+      local noflanguages=readushort(f)
+      local languages={}
+      if defaultoffset>0 then
+        languages.dflt=languagesystems[offset+defaultoffset]
+      end
+      for i=1,noflanguages do
+        local language=readtag(f)
+        local offset=offset+readushort(f)
+        languages[language]=languagesystems[offset]
+      end
+      scripts[script]=languages
+    end
+    for offset,usedfeatures in next,languagesystems do
+      if offset>0 then
+        setposition(f,offset)
+        local featureindices={}
+        usedfeatures.featureindices=featureindices
+        usedfeatures.lookuporder=readushort(f) 
+        usedfeatures.requiredindex=readushort(f) 
+        local noffeatures=readushort(f)
+        for i=1,noffeatures do
+          featureindices[i]=readushort(f)+1
+        end
+      end
+    end
+    return scripts
+  end
+  local function readfeatures(f,fontdata,featureoffset)
+    setposition(f,featureoffset)
+    local features={}
+    local noffeatures=readushort(f)
+    for i=1,noffeatures do
+      features[i]={
+        tag=readtag(f),
+        offset=readushort(f)
+      }
+    end
+    for i=1,noffeatures do
+      local feature=features[i]
+      local offset=featureoffset+feature.offset
+      setposition(f,offset)
+      local parameters=readushort(f) 
+      local noflookups=readushort(f)
+      if noflookups>0 then
+        local lookups={}
+        feature.lookups=lookups
+        for j=1,noflookups do
+          lookups[j]=readushort(f)+1
+        end
+      end
+      if parameters>0 then
+        feature.parameters=parameters
+        local plugin=plugins[feature.tag]
+        if plugin then
+          plugin(f,fontdata,featureoffset,feature)
+        end
+      end
+    end
+    return features
+  end
+  local function readlookups(f,lookupoffset,lookuptypes,featurehash,featureorder)
+    setposition(f,lookupoffset)
+    local lookups={}
+    local noflookups=readushort(f)
+    for i=1,noflookups do
+      lookups[i]=readushort(f)
+    end
+    for lookupid=1,noflookups do
+      local offset=lookups[lookupid]
+      setposition(f,lookupoffset+offset)
+      local subtables={}
+      local typebits=readushort(f)
+      local flagbits=readushort(f)
+      local lookuptype=lookuptypes[typebits]
+      local lookupflags=lookupflags[flagbits]
+      local nofsubtables=readushort(f)
+      for j=1,nofsubtables do
+        subtables[j]=offset+readushort(f) 
+      end
+      local markclass=bittest(flagbits,0x0010) 
+      if markclass then
+        markclass=readushort(f) 
+      end
+      local markset=rshift(flagbits,8)
+      if markset>0 then
+        markclass=markset 
+      end
+      lookups[lookupid]={
+        type=lookuptype,
+        flags=lookupflags,
+        name=lookupid,
+        subtables=subtables,
+        markclass=markclass,
+        features=featurehash[lookupid],
+        order=featureorder[lookupid],
+      }
+    end
+    return lookups
+  end
+  local f_lookupname=formatters["%s_%s_%s"]
+  local function resolvelookups(f,lookupoffset,fontdata,lookups,lookuptypes,lookuphandlers,what,tableoffset)
+    local sequences=fontdata.sequences  or {}
+    local sublookuplist=fontdata.sublookups or {}
+    fontdata.sequences=sequences
+    fontdata.sublookups=sublookuplist
+    local nofsublookups=#sublookuplist
+    local nofsequences=#sequences 
+    local lastsublookup=nofsublookups
+    local lastsequence=nofsequences
+    local lookupnames=lookupnames[what]
+    local sublookuphash={}
+    local sublookupcheck={}
+    local glyphs=fontdata.glyphs
+    local nofglyphs=fontdata.nofglyphs or #glyphs
+    local noflookups=#lookups
+    local lookupprefix=sub(what,2,2)
+    for lookupid=1,noflookups do
+      local lookup=lookups[lookupid]
+      local lookuptype=lookup.type
+      local subtables=lookup.subtables
+      local features=lookup.features
+      local handler=lookuphandlers[lookuptype]
+      if handler then
+        local nofsubtables=#subtables
+        local order=lookup.order
+        local flags=lookup.flags
+        if flags[1] then flags[1]="mark" end
+        if flags[2] then flags[2]="ligature" end
+        if flags[3] then flags[3]="base" end
+        local markclass=lookup.markclass
+        if nofsubtables>0 then
+          local steps={}
+          local nofsteps=0
+          local oldtype=nil
+          for s=1,nofsubtables do
+            local step,lt=handler(f,fontdata,lookupid,lookupoffset,subtables[s],glyphs,nofglyphs)
+            if lt then
+              lookuptype=lt
+              if oldtype and lt~=oldtype then
+                report("messy %s lookup type %a and %a",what,lookuptype,oldtype)
+              end
+              oldtype=lookuptype
+            end
+            if not step then
+              report("unsupported %s lookup type %a",what,lookuptype)
+            else
+              nofsteps=nofsteps+1
+              steps[nofsteps]=step
+              local rules=step.rules
+              if rules then
+                for i=1,#rules do
+                  local rule=rules[i]
+                  local before=rule.before
+                  local current=rule.current
+                  local after=rule.after
+                  local replacements=rule.replacements
+                  if before then
+                    for i=1,#before do
+                      before[i]=tohash(before[i])
+                    end
+                    rule.before=reversed(before)
+                  end
+                  if current then
+                    if replacements then
+                      local first=current[1]
+                      local hash={}
+                      local repl={}
+                      for i=1,#first do
+                        local c=first[i]
+                        hash[c]=true
+                        repl[c]=replacements[i]
+                      end
+                      rule.current={ hash }
+                      rule.replacements=repl
+                    else
+                      for i=1,#current do
+                        current[i]=tohash(current[i])
+                      end
+                    end
+                  end
+                  if after then
+                    for i=1,#after do
+                      after[i]=tohash(after[i])
+                    end
+                  end
+                end
+              end
+            end
+          end
+          if nofsteps~=nofsubtables then
+            report("bogus subtables removed in %s lookup type %a",what,lookuptype)
+          end
+          lookuptype=lookupnames[lookuptype] or lookuptype
+          if features then
+            nofsequences=nofsequences+1
+            local l={
+              index=nofsequences,
+              name=f_lookupname(lookupprefix,"s",lookupid+lookupidoffset),
+              steps=steps,
+              nofsteps=nofsteps,
+              type=lookuptype,
+              markclass=markclass or nil,
+              flags=flags,
+              order=order,
+              features=features,
+            }
+            sequences[nofsequences]=l
+            lookup.done=l
+          else
+            nofsublookups=nofsublookups+1
+            local l={
+              index=nofsublookups,
+              name=f_lookupname(lookupprefix,"l",lookupid+lookupidoffset),
+              steps=steps,
+              nofsteps=nofsteps,
+              type=lookuptype,
+              markclass=markclass or nil,
+              flags=flags,
+            }
+            sublookuplist[nofsublookups]=l
+            sublookuphash[lookupid]=nofsublookups
+            sublookupcheck[lookupid]=0
+            lookup.done=l
+          end
+        else
+          report("no subtables for lookup %a",lookupid)
+        end
+      else
+        report("no handler for lookup %a with type %a",lookupid,lookuptype)
+      end
+    end
+    local reported={}
+    local function report_issue(i,what,sequence,kind)
+      local name=sequence.name
+      if not reported[name] then
+        report("rule %i in %s lookup %a has %s lookups",i,what,name,kind)
+        reported[name]=true
+      end
+    end
+    for i=lastsequence+1,nofsequences do
+      local sequence=sequences[i]
+      local steps=sequence.steps
+      for i=1,#steps do
+        local step=steps[i]
+        local rules=step.rules
+        if rules then
+          for i=1,#rules do
+            local rule=rules[i]
+            local rlookups=rule.lookups
+            if not rlookups then
+              report_issue(i,what,sequence,"no")
+            elseif not next(rlookups) then
+              report_issue(i,what,sequence,"empty")
+              rule.lookups=nil
+            else
+              local length=#rlookups
+              for index=1,length do
+                local lookuplist=rlookups[index]
+                if lookuplist then
+                  local length=#lookuplist
+                  local found={}
+                  local noffound=0
+                  for index=1,length do
+                    local lookupid=lookuplist[index]
+                    if lookupid then
+                      local h=sublookuphash[lookupid]
+                      if not h then
+                        local lookup=lookups[lookupid]
+                        if lookup then
+                          local d=lookup.done
+                          if d then
+                            nofsublookups=nofsublookups+1
+                            h={
+                              index=nofsublookups,
+                              name=f_lookupname(lookupprefix,"d",lookupid+lookupidoffset),
+                              derived=true,
+                              steps=d.steps,
+                              nofsteps=d.nofsteps,
+                              type=d.lookuptype or "gsub_single",
+                              markclass=d.markclass or nil,
+                              flags=d.flags,
+                            }
+                            sublookuplist[nofsublookups]=copy(h) 
+                            sublookuphash[lookupid]=nofsublookups
+                            sublookupcheck[lookupid]=1
+                            h=nofsublookups
+                          else
+                            report_issue(i,what,sequence,"missing")
+                            rule.lookups=nil
+                            break
+                          end
+                        else
+                          report_issue(i,what,sequence,"bad")
+                          rule.lookups=nil
+                          break
+                        end
+                      else
+                        sublookupcheck[lookupid]=sublookupcheck[lookupid]+1
+                      end
+                      if h then
+                        noffound=noffound+1
+                        found[noffound]=h
+                      end
+                    end
+                  end
+                  rlookups[index]=noffound>0 and found or false
+                else
+                  rlookups[index]=false
+                end
+              end
+            end
+          end
+        end
+      end
+    end
+    for i,n in sortedhash(sublookupcheck) do
+      local l=lookups[i]
+      local t=l.type
+      if n==0 and t~="extension" then
+        local d=l.done
+        report("%s lookup %s of type %a is not used",what,d and d.name or l.name,t)
+      end
+    end
+  end
+  local function loadvariations(f,fontdata,variationsoffset,lookuptypes,featurehash,featureorder)
+    setposition(f,variationsoffset)
+    local version=readulong(f)
+    local nofrecords=readulong(f)
+    local records={}
+    for i=1,nofrecords do
+      records[i]={
+        conditions=readulong(f),
+        substitutions=readulong(f),
+      }
+    end
+    for i=1,nofrecords do
+      local record=records[i]
+      local offset=record.conditions
+      if offset==0 then
+        record.condition=nil
+        record.matchtype="always"
+      else
+        setposition(f,variationsoffset+offset)
+        local nofconditions=readushort(f)
+        local conditions={}
+        for i=1,nofconditions do
+          conditions[i]=variationsoffset+offset+readulong(f)
+        end
+        record.conditions=conditions
+        record.matchtype="condition"
+      end
+    end
+    for i=1,nofrecords do
+      local record=records[i]
+      if record.matchtype=="condition" then
+        local conditions=record.conditions
+        for i=1,#conditions do
+          setposition(f,conditions[i])
+          conditions[i]={
+            format=readushort(f),
+            axis=readushort(f),
+            minvalue=read2dot14(f),
+            maxvalue=read2dot14(f),
+          }
+        end
+      end
+    end
+    for i=1,nofrecords do
+      local record=records[i]
+      local offset=record.substitutions
+      if offset==0 then
+        record.substitutions={}
+      else
+        setposition(f,variationsoffset+offset)
+        local version=readulong(f)
+        local nofsubstitutions=readushort(f)
+        local substitutions={}
+        for i=1,nofsubstitutions do
+          substitutions[readushort(f)]=readulong(f)
+        end
+        for index,alternates in sortedhash(substitutions) do
+          if index==0 then
+            record.substitutions=false
+          else
+            local tableoffset=variationsoffset+offset+alternates
+            setposition(f,tableoffset)
+            local parameters=readulong(f) 
+            local noflookups=readushort(f)
+            local lookups={}
+            for i=1,noflookups do
+              lookups[i]=readushort(f) 
+            end
+            record.substitutions=lookups
+          end
+        end
+      end
+    end
+    setvariabledata(fontdata,"features",records)
+  end
+  local function readscripts(f,fontdata,what,lookuptypes,lookuphandlers,lookupstoo)
+    local tableoffset=gotodatatable(f,fontdata,what,true)
+    if tableoffset then
+      local version=readulong(f)
+      local scriptoffset=tableoffset+readushort(f)
+      local featureoffset=tableoffset+readushort(f)
+      local lookupoffset=tableoffset+readushort(f)
+      local variationsoffset=version>0x00010000 and (tableoffset+readulong(f)) or 0
+      if not scriptoffset then
+        return
+      end
+      local scripts=readscriplan(f,fontdata,scriptoffset)
+      local features=readfeatures(f,fontdata,featureoffset)
+      local scriptlangs,featurehash,featureorder=reorderfeatures(fontdata,scripts,features)
+      if fontdata.features then
+        fontdata.features[what]=scriptlangs
+      else
+        fontdata.features={ [what]=scriptlangs }
+      end
+      if not lookupstoo then
+        return
+      end
+      local lookups=readlookups(f,lookupoffset,lookuptypes,featurehash,featureorder)
+      if lookups then
+        resolvelookups(f,lookupoffset,fontdata,lookups,lookuptypes,lookuphandlers,what,tableoffset)
+      end
+      if variationsoffset>0 then
+        loadvariations(f,fontdata,variationsoffset,lookuptypes,featurehash,featureorder)
+      end
+    end
+  end
+  local function checkkerns(f,fontdata,specification)
+    local datatable=fontdata.tables.kern
+    if not datatable then
+      return 
+    end
+    local features=fontdata.features
+    local gposfeatures=features and features.gpos
+    local name
+    if not gposfeatures or not gposfeatures.kern then
+      name="kern"
+    elseif specification.globalkerns then
+      name="globalkern"
+    else
+      report("ignoring global kern table using gpos kern feature")
+      return
+    end
+    setposition(f,datatable.offset)
+    local version=readushort(f)
+    local noftables=readushort(f)
+    if noftables>1 then
+      report("adding global kern table as gpos feature %a",name)
+      local kerns=setmetatableindex("table")
+      for i=1,noftables do
+        local version=readushort(f)
+        local length=readushort(f)
+        local coverage=readushort(f)
+        local format=bit32.rshift(coverage,8) 
+        if format==0 then
+          local nofpairs=readushort(f)
+          local searchrange=readushort(f)
+          local entryselector=readushort(f)
+          local rangeshift=readushort(f)
+          for i=1,nofpairs do
+            kerns[readushort(f)][readushort(f)]=readfword(f)
+          end
+        elseif format==2 then
+        else
+        end
+      end
+      local feature={ dflt={ dflt=true } }
+      if not features then
+        fontdata.features={ gpos={ [name]=feature } }
+      elseif not gposfeatures then
+        fontdata.features.gpos={ [name]=feature }
+      else
+        gposfeatures[name]=feature
+      end
+      local sequences=fontdata.sequences
+      if not sequences then
+        sequences={}
+        fontdata.sequences=sequences
+      end
+      local nofsequences=#sequences+1
+      sequences[nofsequences]={
+        index=nofsequences,
+        name=name,
+        steps={
+          {
+            coverage=kerns,
+            format="kern",
+          },
+        },
+        nofsteps=1,
+        type="gpos_pair",
+        flags={ false,false,false,false },
+        order={ name },
+        features={ [name]=feature },
+      }
+    else
+      report("ignoring empty kern table of feature %a",name)
+    end
+  end
+  function readers.gsub(f,fontdata,specification)
+    if specification.details then
+      readscripts(f,fontdata,"gsub",gsubtypes,gsubhandlers,specification.lookups)
+    end
+  end
+  function readers.gpos(f,fontdata,specification)
+    if specification.details then
+      readscripts(f,fontdata,"gpos",gpostypes,gposhandlers,specification.lookups)
+      if specification.lookups then
+        checkkerns(f,fontdata,specification)
+      end
+    end
+  end
+end
+function readers.gdef(f,fontdata,specification)
+  if not specification.glyphs then
+    return
+  end
+  local datatable=fontdata.tables.gdef
+  if datatable then
+    local tableoffset=datatable.offset
+    setposition(f,tableoffset)
+    local version=readulong(f)
+    local classoffset=readushort(f)
+    local attachmentoffset=readushort(f) 
+    local ligaturecarets=readushort(f) 
+    local markclassoffset=readushort(f)
+    local marksetsoffset=version>=0x00010002 and readushort(f) or 0
+    local varsetsoffset=version>=0x00010003 and readulong(f) or 0
+    local glyphs=fontdata.glyphs
+    local marks={}
+    local markclasses=setmetatableindex("table")
+    local marksets=setmetatableindex("table")
+    fontdata.marks=marks
+    fontdata.markclasses=markclasses
+    fontdata.marksets=marksets
+    if classoffset~=0 then
+      setposition(f,tableoffset+classoffset)
+      local classformat=readushort(f)
+      if classformat==1 then
+        local firstindex=readushort(f)
+        local lastindex=firstindex+readushort(f)-1
+        for index=firstindex,lastindex do
+          local class=classes[readushort(f)]
+          if class=="mark" then
+            marks[index]=true
+          end
+          glyphs[index].class=class
+        end
+      elseif classformat==2 then
+        local nofranges=readushort(f)
+        for i=1,nofranges do
+          local firstindex=readushort(f)
+          local lastindex=readushort(f)
+          local class=classes[readushort(f)]
+          if class then
+            for index=firstindex,lastindex do
+              glyphs[index].class=class
+              if class=="mark" then
+                marks[index]=true
+              end
+            end
+          end
+        end
+      end
+    end
+    if markclassoffset~=0 then
+      setposition(f,tableoffset+markclassoffset)
+      local classformat=readushort(f)
+      if classformat==1 then
+        local firstindex=readushort(f)
+        local lastindex=firstindex+readushort(f)-1
+        for index=firstindex,lastindex do
+          markclasses[readushort(f)][index]=true
+        end
+      elseif classformat==2 then
+        local nofranges=readushort(f)
+        for i=1,nofranges do
+          local firstindex=readushort(f)
+          local lastindex=readushort(f)
+          local class=markclasses[readushort(f)]
+          for index=firstindex,lastindex do
+            class[index]=true
+          end
+        end
+      end
+    end
+    if marksetsoffset~=0 then
+      marksetsoffset=tableoffset+marksetsoffset
+      setposition(f,marksetsoffset)
+      local format=readushort(f)
+      if format==1 then
+        local nofsets=readushort(f)
+        local sets={}
+        for i=1,nofsets do
+          sets[i]=readulong(f)
+        end
+        for i=1,nofsets do
+          local offset=sets[i]
+          if offset~=0 then
+            marksets[i]=readcoverage(f,marksetsoffset+offset)
+          end
+        end
+      end
+    end
+    local factors=specification.factors
+    if (specification.variable or factors) and varsetsoffset~=0 then
+      local regions,deltas=readvariationdata(f,tableoffset+varsetsoffset,factors)
+      if factors then
+        fontdata.temporary.getdelta=function(outer,inner)
+          local delta=deltas[outer+1]
+          if delta then
+            local d=delta.deltas[inner+1]
+            if d then
+              local scales=delta.scales
+              local dd=0
+              for i=1,#scales do
+                local di=d[i]
+                if di then
+                  dd=dd+scales[i]*di
+                else
+                  break
+                end
+              end
+              return round(dd)
+            end
+          end
+          return 0
+        end
+      end
+    end
+  end
+end
+local function readmathvalue(f)
+  local v=readshort(f)
+  skipshort(f,1) 
+  return v
+end
+local function readmathconstants(f,fontdata,offset)
+  setposition(f,offset)
+  fontdata.mathconstants={
+    ScriptPercentScaleDown=readshort(f),
+    ScriptScriptPercentScaleDown=readshort(f),
+    DelimitedSubFormulaMinHeight=readushort(f),
+    DisplayOperatorMinHeight=readushort(f),
+    MathLeading=readmathvalue(f),
+    AxisHeight=readmathvalue(f),
+    AccentBaseHeight=readmathvalue(f),
+    FlattenedAccentBaseHeight=readmathvalue(f),
+    SubscriptShiftDown=readmathvalue(f),
+    SubscriptTopMax=readmathvalue(f),
+    SubscriptBaselineDropMin=readmathvalue(f),
+    SuperscriptShiftUp=readmathvalue(f),
+    SuperscriptShiftUpCramped=readmathvalue(f),
+    SuperscriptBottomMin=readmathvalue(f),
+    SuperscriptBaselineDropMax=readmathvalue(f),
+    SubSuperscriptGapMin=readmathvalue(f),
+    SuperscriptBottomMaxWithSubscript=readmathvalue(f),
+    SpaceAfterScript=readmathvalue(f),
+    UpperLimitGapMin=readmathvalue(f),
+    UpperLimitBaselineRiseMin=readmathvalue(f),
+    LowerLimitGapMin=readmathvalue(f),
+    LowerLimitBaselineDropMin=readmathvalue(f),
+    StackTopShiftUp=readmathvalue(f),
+    StackTopDisplayStyleShiftUp=readmathvalue(f),
+    StackBottomShiftDown=readmathvalue(f),
+    StackBottomDisplayStyleShiftDown=readmathvalue(f),
+    StackGapMin=readmathvalue(f),
+    StackDisplayStyleGapMin=readmathvalue(f),
+    StretchStackTopShiftUp=readmathvalue(f),
+    StretchStackBottomShiftDown=readmathvalue(f),
+    StretchStackGapAboveMin=readmathvalue(f),
+    StretchStackGapBelowMin=readmathvalue(f),
+    FractionNumeratorShiftUp=readmathvalue(f),
+    FractionNumeratorDisplayStyleShiftUp=readmathvalue(f),
+    FractionDenominatorShiftDown=readmathvalue(f),
+    FractionDenominatorDisplayStyleShiftDown=readmathvalue(f),
+    FractionNumeratorGapMin=readmathvalue(f),
+    FractionNumeratorDisplayStyleGapMin=readmathvalue(f),
+    FractionRuleThickness=readmathvalue(f),
+    FractionDenominatorGapMin=readmathvalue(f),
+    FractionDenominatorDisplayStyleGapMin=readmathvalue(f),
+    SkewedFractionHorizontalGap=readmathvalue(f),
+    SkewedFractionVerticalGap=readmathvalue(f),
+    OverbarVerticalGap=readmathvalue(f),
+    OverbarRuleThickness=readmathvalue(f),
+    OverbarExtraAscender=readmathvalue(f),
+    UnderbarVerticalGap=readmathvalue(f),
+    UnderbarRuleThickness=readmathvalue(f),
+    UnderbarExtraDescender=readmathvalue(f),
+    RadicalVerticalGap=readmathvalue(f),
+    RadicalDisplayStyleVerticalGap=readmathvalue(f),
+    RadicalRuleThickness=readmathvalue(f),
+    RadicalExtraAscender=readmathvalue(f),
+    RadicalKernBeforeDegree=readmathvalue(f),
+    RadicalKernAfterDegree=readmathvalue(f),
+    RadicalDegreeBottomRaisePercent=readshort(f),
+  }
+end
+local function readmathglyphinfo(f,fontdata,offset)
+  setposition(f,offset)
+  local italics=readushort(f)
+  local accents=readushort(f)
+  local extensions=readushort(f)
+  local kerns=readushort(f)
+  local glyphs=fontdata.glyphs
+  if italics~=0 then
+    setposition(f,offset+italics)
+    local coverage=readushort(f)
+    local nofglyphs=readushort(f)
+    coverage=readcoverage(f,offset+italics+coverage,true)
+    setposition(f,offset+italics+4)
+    for i=1,nofglyphs do
+      local italic=readmathvalue(f)
+      if italic~=0 then
+        local glyph=glyphs[coverage[i]]
+        local math=glyph.math
+        if not math then
+          glyph.math={ italic=italic }
+        else
+          math.italic=italic
+        end
+      end
+    end
+    fontdata.hasitalics=true
+  end
+  if accents~=0 then
+    setposition(f,offset+accents)
+    local coverage=readushort(f)
+    local nofglyphs=readushort(f)
+    coverage=readcoverage(f,offset+accents+coverage,true)
+    setposition(f,offset+accents+4)
+    for i=1,nofglyphs do
+      local accent=readmathvalue(f)
+      if accent~=0 then
+        local glyph=glyphs[coverage[i]]
+        local math=glyph.math
+        if not math then
+          glyph.math={ accent=accent }
+        else
+          math.accent=accent
+        end
+      end
+    end
+  end
+  if extensions~=0 then
+    setposition(f,offset+extensions)
+  end
+  if kerns~=0 then
+    local kernoffset=offset+kerns
+    setposition(f,kernoffset)
+    local coverage=readushort(f)
+    local nofglyphs=readushort(f)
+    if nofglyphs>0 then
+      local function get(offset)
+        setposition(f,kernoffset+offset)
+        local n=readushort(f)
+        if n==0 then
+          local k=readmathvalue(f)
+          if k==0 then
+          else
+            return { { kern=k } }
+          end
+        else
+          local l={}
+          for i=1,n do
+            l[i]={ height=readmathvalue(f) }
+          end
+          for i=1,n do
+            l[i].kern=readmathvalue(f)
+          end
+          l[n+1]={ kern=readmathvalue(f) }
+          return l
+        end
+      end
+      local kernsets={}
+      for i=1,nofglyphs do
+        local topright=readushort(f)
+        local topleft=readushort(f)
+        local bottomright=readushort(f)
+        local bottomleft=readushort(f)
+        kernsets[i]={
+          topright=topright~=0 and topright  or nil,
+          topleft=topleft~=0 and topleft   or nil,
+          bottomright=bottomright~=0 and bottomright or nil,
+          bottomleft=bottomleft~=0 and bottomleft or nil,
+        }
+      end
+      coverage=readcoverage(f,kernoffset+coverage,true)
+      for i=1,nofglyphs do
+        local kernset=kernsets[i]
+        if next(kernset) then
+          local k=kernset.topright  if k then kernset.topright=get(k) end
+          local k=kernset.topleft   if k then kernset.topleft=get(k) end
+          local k=kernset.bottomright if k then kernset.bottomright=get(k) end
+          local k=kernset.bottomleft if k then kernset.bottomleft=get(k) end
+          if next(kernset) then
+            local glyph=glyphs[coverage[i]]
+            local math=glyph.math
+            if math then
+              math.kerns=kernset
+            else
+              glyph.math={ kerns=kernset }
+            end
+          end
+        end
+      end
+    end
+  end
+end
+local function readmathvariants(f,fontdata,offset)
+  setposition(f,offset)
+  local glyphs=fontdata.glyphs
+  local minoverlap=readushort(f)
+  local vcoverage=readushort(f)
+  local hcoverage=readushort(f)
+  local vnofglyphs=readushort(f)
+  local hnofglyphs=readushort(f)
+  local vconstruction={}
+  local hconstruction={}
+  for i=1,vnofglyphs do
+    vconstruction[i]=readushort(f)
+  end
+  for i=1,hnofglyphs do
+    hconstruction[i]=readushort(f)
+  end
+  fontdata.mathconstants.MinConnectorOverlap=minoverlap
+  local function get(offset,coverage,nofglyphs,construction,kvariants,kparts,kitalic)
+    if coverage~=0 and nofglyphs>0 then
+      local coverage=readcoverage(f,offset+coverage,true)
+      for i=1,nofglyphs do
+        local c=construction[i]
+        if c~=0 then
+          local index=coverage[i]
+          local glyph=glyphs[index]
+          local math=glyph.math
+          setposition(f,offset+c)
+          local assembly=readushort(f)
+          local nofvariants=readushort(f)
+          if nofvariants>0 then
+            local variants,v=nil,0
+            for i=1,nofvariants do
+              local variant=readushort(f)
+              if variant==index then
+              elseif variants then
+                v=v+1
+                variants[v]=variant
+              else
+                v=1
+                variants={ variant }
+              end
+              skipshort(f)
+            end
+            if not variants then
+            elseif not math then
+              math={ [kvariants]=variants }
+              glyph.math=math
+            else
+              math[kvariants]=variants
+            end
+          end
+          if assembly~=0 then
+            setposition(f,offset+c+assembly)
+            local italic=readmathvalue(f)
+            local nofparts=readushort(f)
+            local parts={}
+            for i=1,nofparts do
+              local p={
+                glyph=readushort(f),
+                start=readushort(f),
+                ["end"]=readushort(f),
+                advance=readushort(f),
+              }
+              local flags=readushort(f)
+              if bittest(flags,0x0001) then
+                p.extender=1 
+              end
+              parts[i]=p
+            end
+            if not math then
+              math={
+                [kparts]=parts
+              }
+              glyph.math=math
+            else
+              math[kparts]=parts
+            end
+            if italic and italic~=0 then
+              math[kitalic]=italic
+            end
+          end
+        end
+      end
+    end
+  end
+  get(offset,vcoverage,vnofglyphs,vconstruction,"vvariants","vparts","vitalic")
+  get(offset,hcoverage,hnofglyphs,hconstruction,"hvariants","hparts","hitalic")
+end
+function readers.math(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"math",specification.glyphs)
+  if tableoffset then
+    local version=readulong(f)
+    local constants=readushort(f)
+    local glyphinfo=readushort(f)
+    local variants=readushort(f)
+    if constants==0 then
+      report("the math table of %a has no constants",fontdata.filename)
+    else
+      readmathconstants(f,fontdata,tableoffset+constants)
+    end
+    if glyphinfo~=0 then
+      readmathglyphinfo(f,fontdata,tableoffset+glyphinfo)
+    end
+    if variants~=0 then
+      readmathvariants(f,fontdata,tableoffset+variants)
+    end
+  end
+end
+function readers.colr(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"colr",specification.glyphs)
+  if tableoffset then
+    local version=readushort(f)
+    if version~=0 then
+      report("table version %a of %a is not supported (yet), maybe font %s is bad",version,"colr",fontdata.filename)
+      return
+    end
+    if not fontdata.tables.cpal then
+      report("color table %a in font %a has no mandate %a table","colr",fontdata.filename,"cpal")
+      fontdata.colorpalettes={}
+    end
+    local glyphs=fontdata.glyphs
+    local nofglyphs=readushort(f)
+    local baseoffset=readulong(f)
+    local layeroffset=readulong(f)
+    local noflayers=readushort(f)
+    local layerrecords={}
+    local maxclass=0
+    setposition(f,tableoffset+layeroffset)
+    for i=1,noflayers do
+      local slot=readushort(f)
+      local class=readushort(f)
+      if class<0xFFFF then
+        class=class+1
+        if class>maxclass then
+          maxclass=class
+        end
+      end
+      layerrecords[i]={
+        slot=slot,
+        class=class,
+      }
+    end
+    fontdata.maxcolorclass=maxclass
+    setposition(f,tableoffset+baseoffset)
+    for i=0,nofglyphs-1 do
+      local glyphindex=readushort(f)
+      local firstlayer=readushort(f)
+      local noflayers=readushort(f)
+      local t={}
+      for i=1,noflayers do
+        t[i]=layerrecords[firstlayer+i]
+      end
+      glyphs[glyphindex].colors=t
+    end
+  end
+  fontdata.hascolor=true
+end
+function readers.cpal(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"cpal",specification.glyphs)
+  if tableoffset then
+    local version=readushort(f)
+    local nofpaletteentries=readushort(f)
+    local nofpalettes=readushort(f)
+    local nofcolorrecords=readushort(f)
+    local firstcoloroffset=readulong(f)
+    local colorrecords={}
+    local palettes={}
+    for i=1,nofpalettes do
+      palettes[i]=readushort(f)
+    end
+    if version==1 then
+      local palettettypesoffset=readulong(f)
+      local palettelabelsoffset=readulong(f)
+      local paletteentryoffset=readulong(f)
+    end
+    setposition(f,tableoffset+firstcoloroffset)
+    for i=1,nofcolorrecords do
+      local b,g,r,a=readbytes(f,4)
+      colorrecords[i]={
+        r,g,b,a~=255 and a or nil,
+      }
+    end
+    for i=1,nofpalettes do
+      local p={}
+      local o=palettes[i]
+      for j=1,nofpaletteentries do
+        p[j]=colorrecords[o+j]
+      end
+      palettes[i]=p
+    end
+    fontdata.colorpalettes=palettes
+  end
+end
+function readers.svg(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"svg",specification.glyphs)
+  if tableoffset then
+    local version=readushort(f)
+    local glyphs=fontdata.glyphs
+    local indexoffset=tableoffset+readulong(f)
+    local reserved=readulong(f)
+    setposition(f,indexoffset)
+    local nofentries=readushort(f)
+    local entries={}
+    for i=1,nofentries do
+      entries[i]={
+        first=readushort(f),
+        last=readushort(f),
+        offset=indexoffset+readulong(f),
+        length=readulong(f),
+      }
+    end
+    for i=1,nofentries do
+      local entry=entries[i]
+      setposition(f,entry.offset)
+      entries[i]={
+        first=entry.first,
+        last=entry.last,
+        data=readstring(f,entry.length)
+      }
+    end
+    fontdata.svgshapes=entries
+  end
+  fontdata.hascolor=true
+end
+function readers.sbix(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"sbix",specification.glyphs)
+  if tableoffset then
+    local version=readushort(f)
+    local flags=readushort(f)
+    local nofstrikes=readulong(f)
+    local strikes={}
+    local nofglyphs=fontdata.nofglyphs
+    for i=1,nofstrikes do
+      strikes[i]=readulong(f)
+    end
+      local shapes={}
+      local done=0
+      for i=1,nofstrikes do
+        local strikeoffset=strikes[i]+tableoffset
+        setposition(f,strikeoffset)
+        strikes[i]={
+          ppem=readushort(f),
+          ppi=readushort(f),
+          offset=strikeoffset
+        }
+      end
+      sort(strikes,function(a,b)
+        if b.ppem==a.ppem then
+          return b.ppi<a.ppi
+        else
+          return b.ppem<a.ppem
+        end
+      end)
+      local glyphs={}
+      for i=1,nofstrikes do
+        local strike=strikes[i]
+        local strikeppem=strike.ppem
+        local strikeppi=strike.ppi
+        local strikeoffset=strike.offset
+        setposition(f,strikeoffset)
+        for i=0,nofglyphs do
+          glyphs[i]=readulong(f)
+        end
+        local glyphoffset=glyphs[0]
+        for i=0,nofglyphs-1 do
+          local nextoffset=glyphs[i+1]
+          if not shapes[i] then
+            local datasize=nextoffset-glyphoffset
+            if datasize>0 then
+              setposition(f,strikeoffset+glyphoffset)
+              shapes[i]={
+                x=readshort(f),
+                y=readshort(f),
+                tag=readtag(f),
+                data=readstring(f,datasize-8),
+                ppem=strikeppem,
+                ppi=strikeppi,
+              }
+              done=done+1
+              if done==nofglyphs then
+                break
+              end
+            end
+          end
+          glyphoffset=nextoffset
+        end
+      end
+      fontdata.sbixshapes=shapes
+  end
+end
+function readers.stat(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"stat",true) 
+  if tableoffset then
+    local extras=fontdata.extras
+    local version=readulong(f) 
+    local axissize=readushort(f)
+    local nofaxis=readushort(f)
+    local axisoffset=readulong(f)
+    local nofvalues=readushort(f)
+    local valuesoffset=readulong(f)
+    local fallbackname=extras[readushort(f)] 
+    local axis={}
+    local values={}
+    setposition(f,tableoffset+axisoffset)
+    for i=1,nofaxis do
+      axis[i]={
+        tag=readtag(f),
+        name=lower(extras[readushort(f)]),
+        ordering=readushort(f),
+        variants={}
+      }
+    end
+    setposition(f,tableoffset+valuesoffset)
+    for i=1,nofvalues do
+      values[i]=readushort(f)
+    end
+    for i=1,nofvalues do
+      setposition(f,tableoffset+valuesoffset+values[i])
+      local format=readushort(f)
+      local index=readushort(f)+1
+      local flags=readushort(f)
+      local name=lower(extras[readushort(f)])
+      local value=readfixed(f)
+      local variant
+      if format==1 then
+        variant={
+          flags=flags,
+          name=name,
+          value=value,
+        }
+      elseif format==2 then
+        variant={
+          flags=flags,
+          name=name,
+          value=value,
+          minimum=readfixed(f),
+          maximum=readfixed(f),
+        }
+      elseif format==3 then
+        variant={
+          flags=flags,
+          name=name,
+          value=value,
+          link=readfixed(f),
+        }
+      end
+      insert(axis[index].variants,variant)
+    end
+    sort(axis,function(a,b)
+      return a.ordering<b.ordering
+    end)
+    for i=1,#axis do
+      local a=axis[i]
+      sort(a.variants,function(a,b)
+        return a.name<b.name
+      end)
+      a.ordering=nil
+    end
+    setvariabledata(fontdata,"designaxis",axis)
+    setvariabledata(fontdata,"fallbackname",fallbackname)
+  end
+end
+function readers.avar(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"avar",true) 
+  if tableoffset then
+    local function collect()
+      local nofvalues=readushort(f)
+      local values={}
+      local lastfrom=false
+      local lastto=false
+      for i=1,nofvalues do
+        local f,t=read2dot14(f),read2dot14(f)
+        if lastfrom and f<=lastfrom then
+        elseif lastto and t>=lastto then
+        else
+          values[#values+1]={ f,t }
+          lastfrom,lastto=f,t
+        end
+      end
+      nofvalues=#values
+      if nofvalues>2 then
+        local some=values[1]
+        if some[1]==-1 and some[2]==-1 then
+          some=values[nofvalues]
+          if some[1]==1 and some[2]==1 then
+            for i=2,nofvalues-1 do
+              some=values[i]
+              if some[1]==0 and some[2]==0 then
+                return values
+              end
+            end
+          end
+        end
+      end
+      return false
+    end
+    local majorversion=readushort(f) 
+    local minorversion=readushort(f) 
+    local reserved=readushort(f)
+    local nofaxis=readushort(f)
+    local segments={}
+    for i=1,nofaxis do
+      segments[i]=collect()
+    end
+    setvariabledata(fontdata,"segments",segments)
+  end
+end
+function readers.fvar(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"fvar",true) 
+  if tableoffset then
+    local version=readulong(f) 
+    local offsettoaxis=tableoffset+readushort(f)
+    local reserved=skipshort(f)
+    local nofaxis=readushort(f)
+    local sizeofaxis=readushort(f)
+    local nofinstances=readushort(f)
+    local sizeofinstances=readushort(f)
+    local extras=fontdata.extras
+    local axis={}
+    local instances={}
+    setposition(f,offsettoaxis)
+    for i=1,nofaxis do
+      axis[i]={
+        tag=readtag(f),
+        minimum=readfixed(f),
+        default=readfixed(f),
+        maximum=readfixed(f),
+        flags=readushort(f),
+        name=lower(extras[readushort(f)] or "bad name"),
+      }
+      local n=sizeofaxis-20
+      if n>0 then
+        skipbytes(f,n)
+      elseif n<0 then
+      end
+    end
+    local nofbytes=2+2+2+nofaxis*4
+    local readpsname=nofbytes<=sizeofinstances
+    local skippable=sizeofinstances-nofbytes
+    for i=1,nofinstances do
+      local subfamid=readushort(f)
+      local flags=readushort(f) 
+      local values={}
+      for i=1,nofaxis do
+        values[i]={
+          axis=axis[i].tag,
+          value=readfixed(f),
+        }
+      end
+      local psnameid=readpsname and readushort(f) or 0xFFFF
+      if subfamid==2 or subfamid==17 then
+      elseif subfamid==0xFFFF then
+        subfamid=nil
+      elseif subfamid<=256 or subfamid>=32768 then
+        subfamid=nil 
+      end
+      if psnameid==6 then
+      elseif psnameid==0xFFFF then
+        psnameid=nil
+      elseif psnameid<=256 or psnameid>=32768 then
+        psnameid=nil 
+      end
+      instances[i]={
+        subfamily=extras[subfamid],
+        psname=psnameid and extras[psnameid] or nil,
+        values=values,
+      }
+      if skippable>0 then
+        skipbytes(f,skippable)
+      end
+    end
+    setvariabledata(fontdata,"axis",axis)
+    setvariabledata(fontdata,"instances",instances)
+  end
+end
+function readers.hvar(f,fontdata,specification)
+  local factors=specification.factors
+  if not factors then
+    return
+  end
+  local tableoffset=gotodatatable(f,fontdata,"hvar",specification.variable)
+  if not tableoffset then
+    return
+  end
+  local version=readulong(f) 
+  local variationoffset=tableoffset+readulong(f) 
+  local advanceoffset=tableoffset+readulong(f)
+  local lsboffset=tableoffset+readulong(f)
+  local rsboffset=tableoffset+readulong(f)
+  local regions={}
+  local variations={}
+  local innerindex={} 
+  local outerindex={} 
+  if variationoffset>0 then
+    regions,deltas=readvariationdata(f,variationoffset,factors)
+  end
+  if not regions then
+    return
+  end
+  if advanceoffset>0 then
+    setposition(f,advanceoffset)
+    local format=readushort(f) 
+    local mapcount=readushort(f)
+    local entrysize=rshift(band(format,0x0030),4)+1
+    local nofinnerbits=band(format,0x000F)+1 
+    local innermask=lshift(1,nofinnerbits)-1
+    local readcardinal=read_cardinal[entrysize] 
+    for i=0,mapcount-1 do
+      local mapdata=readcardinal(f)
+      outerindex[i]=rshift(mapdata,nofinnerbits)
+      innerindex[i]=band(mapdata,innermask)
+    end
+    setvariabledata(fontdata,"hvarwidths",true)
+    local glyphs=fontdata.glyphs
+    for i=0,fontdata.nofglyphs-1 do
+      local glyph=glyphs[i]
+      local width=glyph.width
+      if width then
+        local outer=outerindex[i] or 0
+        local inner=innerindex[i] or i
+        if outer and inner then 
+          local delta=deltas[outer+1]
+          if delta then
+            local d=delta.deltas[inner+1]
+            if d then
+              local scales=delta.scales
+              local deltaw=0
+              for i=1,#scales do
+                local di=d[i]
+                if di then
+                  deltaw=deltaw+scales[i]*di
+                else
+                  break 
+                end
+              end
+              glyph.width=width+round(deltaw)
+            end
+          end
+        end
+      end
+    end
+  end
+end
+function readers.vvar(f,fontdata,specification)
+  if not specification.variable then
+    return
+  end
+end
+function readers.mvar(f,fontdata,specification)
+  local tableoffset=gotodatatable(f,fontdata,"mvar",specification.variable)
+  if tableoffset then
+    local version=readulong(f) 
+    local reserved=skipshort(f,1)
+    local recordsize=readushort(f)
+    local nofrecords=readushort(f)
+    local offsettostore=tableoffset+readushort(f)
+    local dimensions={}
+    local factors=specification.factors
+    if factors then
+      local regions,deltas=readvariationdata(f,offsettostore,factors)
+      for i=1,nofrecords do
+        local tag=readtag(f)
+        local var=variabletags[tag]
+        if var then
+          local outer=readushort(f)
+          local inner=readushort(f)
+          local delta=deltas[outer+1]
+          if delta then
+            local d=delta.deltas[inner+1]
+            if d then
+              local scales=delta.scales
+              local dd=0
+              for i=1,#scales do
+                dd=dd+scales[i]*d[i]
+              end
+              var(fontdata,round(dd))
+            end
+          end
+        else
+          skipshort(f,2)
+        end
+        if recordsize>8 then 
+          skipbytes(recordsize-8)
+        end
+      end
+    end
+  end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-oup']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local next,type=next,type
+local P,R,S=lpeg.P,lpeg.R,lpeg.S
+local lpegmatch=lpeg.match
+local insert,remove,copy,unpack=table.insert,table.remove,table.copy,table.unpack
+local formatters=string.formatters
+local sortedkeys=table.sortedkeys
+local sortedhash=table.sortedhash
+local tohash=table.tohash
+local setmetatableindex=table.setmetatableindex
+local report=logs.reporter("otf reader")
+local trace_markwidth=false trackers.register("otf.markwidth",function(v) trace_markwidth=v end)
+local readers=fonts.handlers.otf.readers
+local privateoffset=fonts.constructors and fonts.constructors.privateoffset or 0xF0000 
+local f_private=formatters["P%05X"]
+local f_unicode=formatters["U%05X"]
+local f_index=formatters["I%05X"]
+local f_character_y=formatters["%C"]
+local f_character_n=formatters["[ %C ]"]
+local check_duplicates=true 
+local check_soft_hyphen=true 
+directives.register("otf.checksofthyphen",function(v)
+  check_soft_hyphen=v
+end)
+local function replaced(list,index,replacement)
+  if type(list)=="number" then
+    return replacement
+  elseif type(replacement)=="table" then
+    local t={}
+    local n=index-1
+    for i=1,n do
+      t[i]=list[i]
+    end
+    for i=1,#replacement do
+      n=n+1
+      t[n]=replacement[i]
+    end
+    for i=index+1,#list do
+      n=n+1
+      t[n]=list[i]
+    end
+  else
+    list[index]=replacement
+    return list
+  end
+end
+local function unifyresources(fontdata,indices)
+  local descriptions=fontdata.descriptions
+  local resources=fontdata.resources
+  if not descriptions or not resources then
+    return
+  end
+  local variants=fontdata.resources.variants
+  if variants then
+    for selector,unicodes in next,variants do
+      for unicode,index in next,unicodes do
+        unicodes[unicode]=indices[index]
+      end
+    end
+  end
+  local function remark(marks)
+    if marks then
+      local newmarks={}
+      for k,v in next,marks do
+        local u=indices[k]
+        if u then
+          newmarks[u]=v
+        else
+          report("discarding mark %i",k)
+        end
+      end
+      return newmarks
+    end
+  end
+  local marks=resources.marks
+  if marks then
+    resources.marks=remark(marks)
+  end
+  local markclasses=resources.markclasses
+  if markclasses then
+    for class,marks in next,markclasses do
+      markclasses[class]=remark(marks)
+    end
+  end
+  local marksets=resources.marksets
+  if marksets then
+    for class,marks in next,marksets do
+      marksets[class]=remark(marks)
+    end
+  end
+  local done={}
+  local duplicates=check_duplicates and resources.duplicates
+  if duplicates and not next(duplicates) then
+    duplicates=false
+  end
+  local function recover(cover) 
+    for i=1,#cover do
+      local c=cover[i]
+      if not done[c] then
+        local t={}
+        for k,v in next,c do
+          t[indices[k]]=v
+        end
+        cover[i]=t
+        done[c]=d
+      end
+    end
+  end
+  local function recursed(c) 
+    local t={}
+    for g,d in next,c do
+      if type(d)=="table" then
+        t[indices[g]]=recursed(d)
+      else
+        t[g]=indices[d] 
+      end
+    end
+    return t
+  end
+  local function unifythem(sequences)
+    if not sequences then
+      return
+    end
+    for i=1,#sequences do
+      local sequence=sequences[i]
+      local kind=sequence.type
+      local steps=sequence.steps
+      local features=sequence.features
+      if steps then
+        for i=1,#steps do
+          local step=steps[i]
+          if kind=="gsub_single" then
+            local c=step.coverage
+            if c then
+              local t1=done[c]
+              if not t1 then
+                t1={}
+                if duplicates then
+                  for g1,d1 in next,c do
+                    local ug1=indices[g1]
+                    local ud1=indices[d1]
+                    t1[ug1]=ud1
+                    local dg1=duplicates[ug1]
+                    if dg1 then
+                      for u in next,dg1 do
+                        t1[u]=ud1
+                      end
+                    end
+                  end
+                else
+                  for g1,d1 in next,c do
+                    t1[indices[g1]]=indices[d1]
+                  end
+                end
+                done[c]=t1
+              end
+              step.coverage=t1
+            end
+          elseif kind=="gpos_pair" then
+            local c=step.coverage
+            if c then
+              local t1=done[c]
+              if not t1 then
+                t1={}
+                for g1,d1 in next,c do
+                  local t2=done[d1]
+                  if not t2 then
+                    t2={}
+                    for g2,d2 in next,d1 do
+                      t2[indices[g2]]=d2
+                    end
+                    done[d1]=t2
+                  end
+                  t1[indices[g1]]=t2
+                end
+                done[c]=t1
+              end
+              step.coverage=t1
+            end
+          elseif kind=="gsub_ligature" then
+            local c=step.coverage
+            if c then
+              step.coverage=recursed(c)
+            end
+          elseif kind=="gsub_alternate" or kind=="gsub_multiple" then
+            local c=step.coverage
+            if c then
+              local t1=done[c]
+              if not t1 then
+                t1={}
+                if duplicates then
+                  for g1,d1 in next,c do
+                    for i=1,#d1 do
+                      d1[i]=indices[d1[i]]
+                    end
+                    local ug1=indices[g1]
+                    t1[ug1]=d1
+                    local dg1=duplicates[ug1]
+                    if dg1 then
+                      for u in next,dg1 do
+                        t1[u]=copy(d1)
+                      end
+                    end
+                  end
+                else
+                  for g1,d1 in next,c do
+                    for i=1,#d1 do
+                      d1[i]=indices[d1[i]]
+                    end
+                    t1[indices[g1]]=d1
+                  end
+                end
+                done[c]=t1
+              end
+              step.coverage=t1
+            end
+          elseif kind=="gpos_mark2base" or kind=="gpos_mark2mark" or kind=="gpos_mark2ligature" then
+            local c=step.coverage
+            if c then
+              local t1=done[c]
+              if not t1 then
+                t1={}
+                for g1,d1 in next,c do
+                  t1[indices[g1]]=d1
+                end
+                done[c]=t1
+              end
+              step.coverage=t1
+            end
+            local c=step.baseclasses
+            if c then
+              local t1=done[c]
+              if not t1 then
+                for g1,d1 in next,c do
+                  local t2=done[d1]
+                  if not t2 then
+                    t2={}
+                    for g2,d2 in next,d1 do
+                      t2[indices[g2]]=d2
+                    end
+                    done[d1]=t2
+                  end
+                  c[g1]=t2
+                end
+                done[c]=c
+              end
+            end
+          elseif kind=="gpos_single" then
+            local c=step.coverage
+            if c then
+              local t1=done[c]
+              if not t1 then
+                t1={}
+                if duplicates then
+                  for g1,d1 in next,c do
+                    local ug1=indices[g1]
+                    t1[ug1]=d1
+                    local dg1=duplicates[ug1]
+                    if dg1 then
+                      for u in next,dg1 do
+                        t1[u]=d1
+                      end
+                    end
+                  end
+                else
+                  for g1,d1 in next,c do
+                    t1[indices[g1]]=d1
+                  end
+                end
+                done[c]=t1
+              end
+              step.coverage=t1
+            end
+          elseif kind=="gpos_cursive" then
+            local c=step.coverage
+            if c then
+              local t1=done[c]
+              if not t1 then
+                t1={}
+                if duplicates then
+                  for g1,d1 in next,c do
+                    local ug1=indices[g1]
+                    t1[ug1]=d1
+                    local dg1=duplicates[ug1]
+                    if dg1 then
+                      for u in next,dg1 do
+                        t1[u]=copy(d1)
+                      end
+                    end
+                  end
+                else
+                  for g1,d1 in next,c do
+                    t1[indices[g1]]=d1
+                  end
+                end
+                done[c]=t1
+              end
+              step.coverage=t1
+            end
+          end
+          local rules=step.rules
+          if rules then
+            for i=1,#rules do
+              local rule=rules[i]
+              local before=rule.before  if before then recover(before) end
+              local after=rule.after  if after  then recover(after)  end
+              local current=rule.current if current then recover(current) end
+              local replacements=rule.replacements
+              if replacements then
+                if not done[replacements] then
+                  local r={}
+                  for k,v in next,replacements do
+                    r[indices[k]]=indices[v]
+                  end
+                  rule.replacements=r
+                  done[replacements]=r
+                end
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+  unifythem(resources.sequences)
+  unifythem(resources.sublookups)
+end
+local function copyduplicates(fontdata)
+  if check_duplicates then
+    local descriptions=fontdata.descriptions
+    local resources=fontdata.resources
+    local duplicates=resources.duplicates
+    if check_soft_hyphen then
+      local ds=descriptions[0xAD]
+      if not ds or ds.width==0 then
+        if ds then
+          descriptions[0xAD]=nil
+          report("patching soft hyphen")
+        else
+          report("adding soft hyphen")
+        end
+        if not duplicates then
+          duplicates={}
+          resources.duplicates=duplicates
+        end
+        local dh=duplicates[0x2D]
+        if dh then
+          dh[#dh+1]={ [0xAD]=true }
+        else
+          duplicates[0x2D]={ [0xAD]=true }
+        end
+      end
+    end
+    if duplicates then
+      for u,d in next,duplicates do
+        local du=descriptions[u]
+        if du then
+          local t={ f_character_y(u),"@",f_index(du.index),"->" }
+          local n=0
+          local m=25
+          for u in next,d do
+            if descriptions[u] then
+              if n<m then
+                t[n+4]=f_character_n(u)
+              end
+            else
+              local c=copy(du)
+              c.unicode=u 
+              descriptions[u]=c
+              if n<m then
+                t[n+4]=f_character_y(u)
+              end
+            end
+            n=n+1
+          end
+          if n<=m then
+            report("duplicates: %i : % t",n,t)
+          else
+            report("duplicates: %i : % t ...",n,t)
+          end
+        else
+        end
+      end
+    end
+  end
+end
+local ignore={ 
+  ["notdef"]=true,
+  [".notdef"]=true,
+  ["null"]=true,
+  [".null"]=true,
+  ["nonmarkingreturn"]=true,
+}
+local function checklookups(fontdata,missing,nofmissing)
+  local descriptions=fontdata.descriptions
+  local resources=fontdata.resources
+  if missing and nofmissing and nofmissing<=0 then
+    return
+  end
+  local singles={}
+  local alternates={}
+  local ligatures={}
+  if not missing then
+    missing={}
+    nofmissing=0
+    for u,d in next,descriptions do
+      if not d.unicode then
+        nofmissing=nofmissing+1
+        missing[u]=true
+      end
+    end
+  end
+  local function collectthem(sequences)
+    if not sequences then
+      return
+    end
+    for i=1,#sequences do
+      local sequence=sequences[i]
+      local kind=sequence.type
+      local steps=sequence.steps
+      if steps then
+        for i=1,#steps do
+          local step=steps[i]
+          if kind=="gsub_single" then
+            local c=step.coverage
+            if c then
+              singles[#singles+1]=c
+            end
+          elseif kind=="gsub_alternate" then
+            local c=step.coverage
+            if c then
+              alternates[#alternates+1]=c
+            end
+          elseif kind=="gsub_ligature" then
+            local c=step.coverage
+            if c then
+              ligatures[#ligatures+1]=c
+            end
+          end
+        end
+      end
+    end
+  end
+  collectthem(resources.sequences)
+  collectthem(resources.sublookups)
+  local loops=0
+  while true do
+    loops=loops+1
+    local old=nofmissing
+    for i=1,#singles do
+      local c=singles[i]
+      for g1,g2 in next,c do
+        if missing[g1] then
+          local u2=descriptions[g2].unicode
+          if u2 then
+            missing[g1]=false
+            descriptions[g1].unicode=u2
+            nofmissing=nofmissing-1
+          end
+        end
+        if missing[g2] then
+          local u1=descriptions[g1].unicode
+          if u1 then
+            missing[g2]=false
+            descriptions[g2].unicode=u1
+            nofmissing=nofmissing-1
+          end
+        end
+      end
+    end
+    for i=1,#alternates do
+      local c=alternates[i]
+      for g1,d1 in next,c do
+        if missing[g1] then
+          for i=1,#d1 do
+            local g2=d1[i]
+            local u2=descriptions[g2].unicode
+            if u2 then
+              missing[g1]=false
+              descriptions[g1].unicode=u2
+              nofmissing=nofmissing-1
+            end
+          end
+        end
+        if not missing[g1] then
+          for i=1,#d1 do
+            local g2=d1[i]
+            if missing[g2] then
+              local u1=descriptions[g1].unicode
+              if u1 then
+                missing[g2]=false
+                descriptions[g2].unicode=u1
+                nofmissing=nofmissing-1
+              end
+            end
+          end
+        end
+      end
+    end
+    if nofmissing<=0 then
+      report("all done in %s loops",loops)
+      return
+    elseif old==nofmissing then
+      break
+    end
+  end
+  local t,n 
+  local function recursed(c)
+    for g,d in next,c do
+      if g~="ligature" then
+        local u=descriptions[g].unicode
+        if u then
+          n=n+1
+          t[n]=u
+          recursed(d)
+          n=n-1
+        end
+      elseif missing[d] then
+        local l={}
+        local m=0
+        for i=1,n do
+          local u=t[i]
+          if type(u)=="table" then
+            for i=1,#u do
+              m=m+1
+              l[m]=u[i]
+            end
+          else
+            m=m+1
+            l[m]=u
+          end
+        end
+        missing[d]=false
+        descriptions[d].unicode=l
+        nofmissing=nofmissing-1
+      end
+    end
+  end
+  if nofmissing>0 then
+    t={}
+    n=0
+    local loops=0
+    while true do
+      loops=loops+1
+      local old=nofmissing
+      for i=1,#ligatures do
+        recursed(ligatures[i])
+      end
+      if nofmissing<=0 then
+        report("all done in %s loops",loops)
+        return
+      elseif old==nofmissing then
+        break
+      end
+    end
+    t=nil
+    n=0
+  end
+  if nofmissing>0 then
+    local done={}
+    for i,r in next,missing do
+      if r then
+        local data=descriptions[i]
+        local name=data and data.name or f_index(i)
+        if not ignore[name] then
+          done[name]=true
+        end
+      end
+    end
+    if next(done) then
+      report("not unicoded: % t",sortedkeys(done))
+    end
+  end
+end
+local function unifymissing(fontdata)
+  if not fonts.mappings then
+    require("font-map")
+    require("font-agl")
+  end
+  local unicodes={}
+  local resources=fontdata.resources
+  resources.unicodes=unicodes
+  for unicode,d in next,fontdata.descriptions do
+    if unicode<privateoffset then
+      local name=d.name
+      if name then
+        unicodes[name]=unicode
+      end
+    end
+  end
+  fonts.mappings.addtounicode(fontdata,fontdata.filename,checklookups)
+  resources.unicodes=nil
+end
+local function unifyglyphs(fontdata,usenames)
+  local private=fontdata.private or privateoffset
+  local glyphs=fontdata.glyphs
+  local indices={}
+  local descriptions={}
+  local names=usenames and {}
+  local resources=fontdata.resources
+  local zero=glyphs[0]
+  local zerocode=zero.unicode
+  if not zerocode then
+    zerocode=private
+    zero.unicode=zerocode
+    private=private+1
+  end
+  descriptions[zerocode]=zero
+  if names then
+    local name=glyphs[0].name or f_private(zerocode)
+    indices[0]=name
+    names[name]=zerocode
+  else
+    indices[0]=zerocode
+  end
+  for index=1,#glyphs do
+    local glyph=glyphs[index]
+    local unicode=glyph.unicode 
+    if not unicode then
+      unicode=private
+      if names then
+        local name=glyph.name or f_private(unicode)
+        indices[index]=name
+        names[name]=unicode
+      else
+        indices[index]=unicode
+      end
+      private=private+1
+    elseif descriptions[unicode] then
+      report("assigning private unicode %U to glyph indexed %05X (%C)",private,index,unicode)
+      unicode=private
+      if names then
+        local name=glyph.name or f_private(unicode)
+        indices[index]=name
+        names[name]=unicode
+      else
+        indices[index]=unicode
+      end
+      private=private+1
+    else
+      if names then
+        local name=glyph.name or f_unicode(unicode)
+        indices[index]=name
+        names[name]=unicode
+      else
+        indices[index]=unicode
+      end
+    end
+    descriptions[unicode]=glyph
+  end
+  for index=1,#glyphs do
+    local math=glyphs[index].math
+    if math then
+      local list=math.vparts
+      if list then
+        for i=1,#list do local l=list[i] l.glyph=indices[l.glyph] end
+      end
+      local list=math.hparts
+      if list then
+        for i=1,#list do local l=list[i] l.glyph=indices[l.glyph] end
+      end
+      local list=math.vvariants
+      if list then
+        for i=1,#list do list[i]=indices[list[i]] end
+      end
+      local list=math.hvariants
+      if list then
+        for i=1,#list do list[i]=indices[list[i]] end
+      end
+    end
+  end
+  local colorpalettes=resources.colorpalettes
+  if colorpalettes then
+    for index=1,#glyphs do
+      local colors=glyphs[index].colors
+      if colors then
+        for i=1,#colors do
+          local c=colors[i]
+          c.slot=indices[c.slot]
+        end
+      end
+    end
+  end
+  fontdata.private=private
+  fontdata.glyphs=nil
+  fontdata.names=names
+  fontdata.descriptions=descriptions
+  fontdata.hashmethod=hashmethod
+  return indices,names
+end
+local p_bogusname=(
+  (P("uni")+P("UNI")+P("Uni")+P("U")+P("u"))*S("Xx")^0*R("09","AF")^1+(P("identity")+P("Identity")+P("IDENTITY"))*R("09","AF")^1+(P("index")+P("Index")+P("INDEX"))*R("09")^1
+)*P(-1)
+local function stripredundant(fontdata)
+  local descriptions=fontdata.descriptions
+  if descriptions then
+    local n=0
+    local c=0
+    for unicode,d in next,descriptions do
+      local name=d.name
+      if name and lpegmatch(p_bogusname,name) then
+        d.name=nil
+        n=n+1
+      end
+      if d.class=="base" then
+        d.class=nil
+        c=c+1
+      end
+    end
+    if n>0 then
+      report("%s bogus names removed (verbose unicode)",n)
+    end
+    if c>0 then
+      report("%s base class tags removed (default is base)",c)
+    end
+  end
+end
+function readers.getcomponents(fontdata) 
+  local resources=fontdata.resources
+  if resources then
+    local sequences=resources.sequences
+    if sequences then
+      local collected={}
+      for i=1,#sequences do
+        local sequence=sequences[i]
+        if sequence.type=="gsub_ligature" then
+          local steps=sequence.steps
+          if steps then
+            local l={}
+            local function traverse(p,k,v)
+              if k=="ligature" then
+                collected[v]={ unpack(l) }
+              else
+                insert(l,k)
+                for k,vv in next,v do
+                  traverse(p,k,vv)
+                end
+                remove(l)
+              end
+            end
+            for i=1,#steps do
+              local coverage=steps[i].coverage
+              if coverage then
+                for k,v in next,coverage do
+                  traverse(k,k,v)
+                end
+              end
+            end
+          end
+        end
+      end
+      if next(collected) then
+        while true do
+          local done=false
+          for k,v in next,collected do
+            for i=1,#v do
+              local vi=v[i]
+              if vi==k then
+                collected[k]=nil
+                break
+              else
+                local c=collected[vi]
+                if c then
+                  done=true
+                  local t={}
+                  local n=i-1
+                  for j=1,n do
+                    t[j]=v[j]
+                  end
+                  for j=1,#c do
+                    n=n+1
+                    t[n]=c[j]
+                  end
+                  for j=i+1,#v do
+                    n=n+1
+                    t[n]=v[j]
+                  end
+                  collected[k]=t
+                  break
+                end
+              end
+            end
+          end
+          if not done then
+            break
+          end
+        end
+        return collected
+      end
+    end
+  end
+end
+readers.unifymissing=unifymissing
+function readers.rehash(fontdata,hashmethod) 
+  if not (fontdata and fontdata.glyphs) then
+    return
+  end
+  if hashmethod=="indices" then
+    fontdata.hashmethod="indices"
+  elseif hashmethod=="names" then
+    fontdata.hashmethod="names"
+    local indices=unifyglyphs(fontdata,true)
+    unifyresources(fontdata,indices)
+    copyduplicates(fontdata)
+    unifymissing(fontdata)
+  else
+    fontdata.hashmethod="unicodes"
+    local indices=unifyglyphs(fontdata)
+    unifyresources(fontdata,indices)
+    copyduplicates(fontdata)
+    unifymissing(fontdata)
+    stripredundant(fontdata)
+  end
+end
+function readers.checkhash(fontdata)
+  local hashmethod=fontdata.hashmethod
+  if hashmethod=="unicodes" then
+    fontdata.names=nil 
+  elseif hashmethod=="names" and fontdata.names then
+    unifyresources(fontdata,fontdata.names)
+    copyduplicates(fontdata)
+    fontdata.hashmethod="unicodes"
+    fontdata.names=nil 
+  else
+    readers.rehash(fontdata,"unicodes")
+  end
+end
+function readers.addunicodetable(fontdata)
+  local resources=fontdata.resources
+  local unicodes=resources.unicodes
+  if not unicodes then
+    local descriptions=fontdata.descriptions
+    if descriptions then
+      unicodes={}
+      resources.unicodes=unicodes
+      for u,d in next,descriptions do
+        local n=d.name
+        if n then
+          unicodes[n]=u
+        end
+      end
+    end
+  end
+end
+local concat,sort=table.concat,table.sort
+local next,type,tostring=next,type,tostring
+local criterium=1
+local threshold=0
+local trace_packing=false trackers.register("otf.packing",function(v) trace_packing=v end)
+local trace_loading=false trackers.register("otf.loading",function(v) trace_loading=v end)
+local report_otf=logs.reporter("fonts","otf loading")
+local function tabstr_normal(t)
+  local s={}
+  local n=0
+  for k,v in next,t do
+    n=n+1
+    if type(v)=="table" then
+      s[n]=k..">"..tabstr_normal(v)
+    elseif v==true then
+      s[n]=k.."+" 
+    elseif v then
+      s[n]=k.."="..v
+    else
+      s[n]=k.."-" 
+    end
+  end
+  if n==0 then
+    return ""
+  elseif n==1 then
+    return s[1]
+  else
+    sort(s) 
+    return concat(s,",")
+  end
+end
+local function tabstr_flat(t)
+  local s={}
+  local n=0
+  for k,v in next,t do
+    n=n+1
+    s[n]=k.."="..v
+  end
+  if n==0 then
+    return ""
+  elseif n==1 then
+    return s[1]
+  else
+    sort(s) 
+    return concat(s,",")
+  end
+end
+local function tabstr_mixed(t) 
+  local s={}
+  local n=#t
+  if n==0 then
+    return ""
+  elseif n==1 then
+    local k=t[1]
+    if k==true then
+      return "++" 
+    elseif k==false then
+      return "--" 
+    else
+      return tostring(k) 
+    end
+  else
+    for i=1,n do
+      local k=t[i]
+      if k==true then
+        s[i]="++" 
+      elseif k==false then
+        s[i]="--" 
+      else
+        s[i]=k 
+      end
+    end
+    return concat(s,",")
+  end
+end
+local function tabstr_boolean(t)
+  local s={}
+  local n=0
+  for k,v in next,t do
+    n=n+1
+    if v then
+      s[n]=k.."+"
+    else
+      s[n]=k.."-"
+    end
+  end
+  if n==0 then
+    return ""
+  elseif n==1 then
+    return s[1]
+  else
+    sort(s) 
+    return concat(s,",")
+  end
+end
+function readers.pack(data)
+  if data then
+    local h,t,c={},{},{}
+    local hh,tt,cc={},{},{}
+    local nt,ntt=0,0
+    local function pack_normal(v)
+      local tag=tabstr_normal(v)
+      local ht=h[tag]
+      if ht then
+        c[ht]=c[ht]+1
+        return ht
+      else
+        nt=nt+1
+        t[nt]=v
+        h[tag]=nt
+        c[nt]=1
+        return nt
+      end
+    end
+    local function pack_normal_cc(v)
+      local tag=tabstr_normal(v)
+      local ht=h[tag]
+      if ht then
+        c[ht]=c[ht]+1
+        return ht
+      else
+        v[1]=0
+        nt=nt+1
+        t[nt]=v
+        h[tag]=nt
+        c[nt]=1
+        return nt
+      end
+    end
+    local function pack_flat(v)
+      local tag=tabstr_flat(v)
+      local ht=h[tag]
+      if ht then
+        c[ht]=c[ht]+1
+        return ht
+      else
+        nt=nt+1
+        t[nt]=v
+        h[tag]=nt
+        c[nt]=1
+        return nt
+      end
+    end
+    local function pack_indexed(v)
+      local tag=concat(v," ")
+      local ht=h[tag]
+      if ht then
+        c[ht]=c[ht]+1
+        return ht
+      else
+        nt=nt+1
+        t[nt]=v
+        h[tag]=nt
+        c[nt]=1
+        return nt
+      end
+    end
+    local function pack_mixed(v)
+      local tag=tabstr_mixed(v)
+      local ht=h[tag]
+      if ht then
+        c[ht]=c[ht]+1
+        return ht
+      else
+        nt=nt+1
+        t[nt]=v
+        h[tag]=nt
+        c[nt]=1
+        return nt
+      end
+    end
+    local function pack_boolean(v)
+      local tag=tabstr_boolean(v)
+      local ht=h[tag]
+      if ht then
+        c[ht]=c[ht]+1
+        return ht
+      else
+        nt=nt+1
+        t[nt]=v
+        h[tag]=nt
+        c[nt]=1
+        return nt
+      end
+    end
+    local function pack_final(v)
+      if c[v]<=criterium then
+        return t[v]
+      else
+        local hv=hh[v]
+        if hv then
+          return hv
+        else
+          ntt=ntt+1
+          tt[ntt]=t[v]
+          hh[v]=ntt
+          cc[ntt]=c[v]
+          return ntt
+        end
+      end
+    end
+    local function pack_final_cc(v)
+      if c[v]<=criterium then
+        return t[v]
+      else
+        local hv=hh[v]
+        if hv then
+          return hv
+        else
+          ntt=ntt+1
+          tt[ntt]=t[v]
+          hh[v]=ntt
+          cc[ntt]=c[v]
+          return ntt
+        end
+      end
+    end
+    local function success(stage,pass)
+      if nt==0 then
+        if trace_loading or trace_packing then
+          report_otf("pack quality: nothing to pack")
+        end
+        return false
+      elseif nt>=threshold then
+        local one,two,rest=0,0,0
+        if pass==1 then
+          for k,v in next,c do
+            if v==1 then
+              one=one+1
+            elseif v==2 then
+              two=two+1
+            else
+              rest=rest+1
+            end
+          end
+        else
+          for k,v in next,cc do
+            if v>20 then
+              rest=rest+1
+            elseif v>10 then
+              two=two+1
+            else
+              one=one+1
+            end
+          end
+          data.tables=tt
+        end
+        if trace_loading or trace_packing then
+          report_otf("pack quality: stage %s, pass %s, %s packed, 1-10:%s, 11-20:%s, rest:%s (criterium: %s)",
+            stage,pass,one+two+rest,one,two,rest,criterium)
+        end
+        return true
+      else
+        if trace_loading or trace_packing then
+          report_otf("pack quality: stage %s, pass %s, %s packed, aborting pack (threshold: %s)",
+            stage,pass,nt,threshold)
+        end
+        return false
+      end
+    end
+    local function packers(pass)
+      if pass==1 then
+        return pack_normal,pack_indexed,pack_flat,pack_boolean,pack_mixed,pack_normal_cc
+      else
+        return pack_final,pack_final,pack_final,pack_final,pack_final,pack_final_cc
+      end
+    end
+    local resources=data.resources
+    local sequences=resources.sequences
+    local sublookups=resources.sublookups
+    local features=resources.features
+    local palettes=resources.colorpalettes
+    local variable=resources.variabledata
+    local chardata=characters and characters.data
+    local descriptions=data.descriptions or data.glyphs
+    if not descriptions then
+      return
+    end
+    for pass=1,2 do
+      if trace_packing then
+        report_otf("start packing: stage 1, pass %s",pass)
+      end
+      local pack_normal,pack_indexed,pack_flat,pack_boolean,pack_mixed,pack_normal_cc=packers(pass)
+      for unicode,description in next,descriptions do
+        local boundingbox=description.boundingbox
+        if boundingbox then
+          description.boundingbox=pack_indexed(boundingbox)
+        end
+        local math=description.math
+        if math then
+          local kerns=math.kerns
+          if kerns then
+            for tag,kern in next,kerns do
+              kerns[tag]=pack_normal(kern)
+            end
+          end
+        end
+      end
+      local function packthem(sequences)
+        for i=1,#sequences do
+          local sequence=sequences[i]
+          local kind=sequence.type
+          local steps=sequence.steps
+          local order=sequence.order
+          local features=sequence.features
+          local flags=sequence.flags
+          if steps then
+            for i=1,#steps do
+              local step=steps[i]
+              if kind=="gpos_pair" then
+                local c=step.coverage
+                if c then
+                  if step.format=="pair" then
+                    for g1,d1 in next,c do
+                      for g2,d2 in next,d1 do
+                        local f=d2[1] if f and f~=true then d2[1]=pack_indexed(f) end
+                        local s=d2[2] if s and s~=true then d2[2]=pack_indexed(s) end
+                      end
+                    end
+                  else
+                    for g1,d1 in next,c do
+                      c[g1]=pack_normal(d1)
+                    end
+                  end
+                end
+              elseif kind=="gpos_single" then
+                local c=step.coverage
+                if c then
+                  if step.format=="single" then
+                    for g1,d1 in next,c do
+                      if d1 and d1~=true then
+                        c[g1]=pack_indexed(d1)
+                      end
+                    end
+                  else
+                    step.coverage=pack_normal(c)
+                  end
+                end
+              elseif kind=="gpos_cursive" then
+                local c=step.coverage
+                if c then
+                  for g1,d1 in next,c do
+                    local f=d1[2] if f then d1[2]=pack_indexed(f) end
+                    local s=d1[3] if s then d1[3]=pack_indexed(s) end
+                  end
+                end
+              elseif kind=="gpos_mark2base" or kind=="gpos_mark2mark" then
+                local c=step.baseclasses
+                if c then
+                  for g1,d1 in next,c do
+                    for g2,d2 in next,d1 do
+                      d1[g2]=pack_indexed(d2)
+                    end
+                  end
+                end
+                local c=step.coverage
+                if c then
+                  for g1,d1 in next,c do
+                    d1[2]=pack_indexed(d1[2])
+                  end
+                end
+              elseif kind=="gpos_mark2ligature" then
+                local c=step.baseclasses
+                if c then
+                  for g1,d1 in next,c do
+                    for g2,d2 in next,d1 do
+                      for g3,d3 in next,d2 do
+                        d2[g3]=pack_indexed(d3)
+                      end
+                    end
+                  end
+                end
+                local c=step.coverage
+                if c then
+                  for g1,d1 in next,c do
+                    d1[2]=pack_indexed(d1[2])
+                  end
+                end
+              end
+              local rules=step.rules
+              if rules then
+                for i=1,#rules do
+                  local rule=rules[i]
+                  local r=rule.before    if r then for i=1,#r do r[i]=pack_boolean(r[i]) end end
+                  local r=rule.after    if r then for i=1,#r do r[i]=pack_boolean(r[i]) end end
+                  local r=rule.current   if r then for i=1,#r do r[i]=pack_boolean(r[i]) end end
+                  local r=rule.replacements if r then rule.replacements=pack_flat  (r)  end
+                end
+              end
+            end
+          end
+          if order then
+            sequence.order=pack_indexed(order)
+          end
+          if features then
+            for script,feature in next,features do
+              features[script]=pack_normal(feature)
+            end
+          end
+          if flags then
+            sequence.flags=pack_normal(flags)
+          end
+        end
+      end
+      if sequences then
+        packthem(sequences)
+      end
+      if sublookups then
+        packthem(sublookups)
+      end
+      if features then
+        for k,list in next,features do
+          for feature,spec in next,list do
+            list[feature]=pack_normal(spec)
+          end
+        end
+      end
+      if palettes then
+        for i=1,#palettes do
+          local p=palettes[i]
+          for j=1,#p do
+            p[j]=pack_indexed(p[j])
+          end
+        end
+      end
+      if variable then
+        local instances=variable.instances
+        if instances then
+          for i=1,#instances do
+            local v=instances[i].values
+            for j=1,#v do
+              v[j]=pack_normal(v[j])
+            end
+          end
+        end
+        local function packdeltas(main)
+          if main then
+            local deltas=main.deltas
+            if deltas then
+              for i=1,#deltas do
+                local di=deltas[i]
+                local d=di.deltas
+                for j=1,#d do
+                  d[j]=pack_indexed(d[j])
+                end
+                di.regions=pack_indexed(di.regions)
+              end
+            end
+            local regions=main.regions
+            if regions then
+              for i=1,#regions do
+                local r=regions[i]
+                for j=1,#r do
+                  r[j]=pack_normal(r[j])
+                end
+              end
+            end
+          end
+        end
+        packdeltas(variable.global)
+        packdeltas(variable.horizontal)
+        packdeltas(variable.vertical)
+        packdeltas(variable.metrics)
+      end
+      if not success(1,pass) then
+        return
+      end
+    end
+    if nt>0 then
+      for pass=1,2 do
+        if trace_packing then
+          report_otf("start packing: stage 2, pass %s",pass)
+        end
+        local pack_normal,pack_indexed,pack_flat,pack_boolean,pack_mixed,pack_normal_cc=packers(pass)
+        for unicode,description in next,descriptions do
+          local math=description.math
+          if math then
+            local kerns=math.kerns
+            if kerns then
+              math.kerns=pack_normal(kerns)
+            end
+          end
+        end
+        local function packthem(sequences)
+          for i=1,#sequences do
+            local sequence=sequences[i]
+            local kind=sequence.type
+            local steps=sequence.steps
+            local features=sequence.features
+            if steps then
+              for i=1,#steps do
+                local step=steps[i]
+                if kind=="gpos_pair" then
+                  local c=step.coverage
+                  if c then
+                    if step.format=="pair" then
+                      for g1,d1 in next,c do
+                        for g2,d2 in next,d1 do
+                          d1[g2]=pack_normal(d2)
+                        end
+                      end
+                    end
+                  end
+                elseif kind=="gpos_mark2ligature" then
+                  local c=step.baseclasses 
+                  if c then
+                    for g1,d1 in next,c do
+                      for g2,d2 in next,d1 do
+                        d1[g2]=pack_normal(d2)
+                      end
+                    end
+                  end
+                end
+                local rules=step.rules
+                if rules then
+                  for i=1,#rules do
+                    local rule=rules[i]
+                    local r=rule.before if r then rule.before=pack_normal(r) end
+                    local r=rule.after  if r then rule.after=pack_normal(r) end
+                    local r=rule.current if r then rule.current=pack_normal(r) end
+                  end
+                end
+              end
+            end
+            if features then
+              sequence.features=pack_normal(features)
+            end
+          end
+        end
+        if sequences then
+          packthem(sequences)
+        end
+        if sublookups then
+          packthem(sublookups)
+        end
+        if variable then
+          local function unpackdeltas(main)
+            if main then
+              local regions=main.regions
+              if regions then
+                main.regions=pack_normal(regions)
+              end
+            end
+          end
+          unpackdeltas(variable.global)
+          unpackdeltas(variable.horizontal)
+          unpackdeltas(variable.vertical)
+          unpackdeltas(variable.metrics)
+        end
+      end
+      for pass=1,2 do
+        if trace_packing then
+          report_otf("start packing: stage 3, pass %s",pass)
+        end
+        local pack_normal,pack_indexed,pack_flat,pack_boolean,pack_mixed,pack_normal_cc=packers(pass)
+        local function packthem(sequences)
+          for i=1,#sequences do
+            local sequence=sequences[i]
+            local kind=sequence.type
+            local steps=sequence.steps
+            local features=sequence.features
+            if steps then
+              for i=1,#steps do
+                local step=steps[i]
+                if kind=="gpos_pair" then
+                  local c=step.coverage
+                  if c then
+                    if step.format=="pair" then
+                      for g1,d1 in next,c do
+                        c[g1]=pack_normal(d1)
+                      end
+                    end
+                  end
+                elseif kind=="gpos_cursive" then
+                  local c=step.coverage
+                  if c then
+                    for g1,d1 in next,c do
+                      c[g1]=pack_normal_cc(d1)
+                    end
+                  end
+                end
+              end
+            end
+          end
+        end
+        if sequences then
+          packthem(sequences)
+        end
+        if sublookups then
+          packthem(sublookups)
+        end
+      end
+    end
+  end
+end
+local unpacked_mt={
+  __index=function(t,k)
+      t[k]=false
+      return k 
+    end
+}
+function readers.unpack(data)
+  if data then
+    local tables=data.tables
+    if tables then
+      local resources=data.resources
+      local descriptions=data.descriptions or data.glyphs
+      local sequences=resources.sequences
+      local sublookups=resources.sublookups
+      local features=resources.features
+      local palettes=resources.colorpalettes
+      local variable=resources.variabledata
+      local unpacked={}
+      setmetatable(unpacked,unpacked_mt)
+      for unicode,description in next,descriptions do
+        local tv=tables[description.boundingbox]
+        if tv then
+          description.boundingbox=tv
+        end
+        local math=description.math
+        if math then
+          local kerns=math.kerns
+          if kerns then
+            local tm=tables[kerns]
+            if tm then
+              math.kerns=tm
+              kerns=unpacked[tm]
+            end
+            if kerns then
+              for k,kern in next,kerns do
+                local tv=tables[kern]
+                if tv then
+                  kerns[k]=tv
+                end
+              end
+            end
+          end
+        end
+      end
+      local function unpackthem(sequences)
+        for i=1,#sequences do
+          local sequence=sequences[i]
+          local kind=sequence.type
+          local steps=sequence.steps
+          local order=sequence.order
+          local features=sequence.features
+          local flags=sequence.flags
+          local markclass=sequence.markclass
+          if features then
+            local tv=tables[features]
+            if tv then
+              sequence.features=tv
+              features=tv
+            end
+            for script,feature in next,features do
+              local tv=tables[feature]
+              if tv then
+                features[script]=tv
+              end
+            end
+          end
+          if steps then
+            for i=1,#steps do
+              local step=steps[i]
+              if kind=="gpos_pair" then
+                local c=step.coverage
+                if c then
+                  if step.format=="pair" then
+                    for g1,d1 in next,c do
+                      local tv=tables[d1]
+                      if tv then
+                        c[g1]=tv
+                        d1=tv
+                      end
+                      for g2,d2 in next,d1 do
+                        local tv=tables[d2]
+                        if tv then
+                          d1[g2]=tv
+                          d2=tv
+                        end
+                        local f=tables[d2[1]] if f then d2[1]=f end
+                        local s=tables[d2[2]] if s then d2[2]=s end
+                      end
+                    end
+                  else
+                    for g1,d1 in next,c do
+                      local tv=tables[d1]
+                      if tv then
+                        c[g1]=tv
+                      end
+                    end
+                  end
+                end
+              elseif kind=="gpos_single" then
+                local c=step.coverage
+                if c then
+                  if step.format=="single" then
+                    for g1,d1 in next,c do
+                      local tv=tables[d1]
+                      if tv then
+                        c[g1]=tv
+                      end
+                    end
+                  else
+                    local tv=tables[c]
+                    if tv then
+                      step.coverage=tv
+                    end
+                  end
+                end
+              elseif kind=="gpos_cursive" then
+                local c=step.coverage
+                if c then
+                  for g1,d1 in next,c do
+                    local tv=tables[d1]
+                    if tv then
+                      d1=tv
+                      c[g1]=d1
+                    end
+                    local f=tables[d1[2]] if f then d1[2]=f end
+                    local s=tables[d1[3]] if s then d1[3]=s end
+                  end
+                end
+              elseif kind=="gpos_mark2base" or kind=="gpos_mark2mark" then
+                local c=step.baseclasses
+                if c then
+                  for g1,d1 in next,c do
+                    for g2,d2 in next,d1 do
+                      local tv=tables[d2]
+                      if tv then
+                        d1[g2]=tv
+                      end
+                    end
+                  end
+                end
+                local c=step.coverage
+                if c then
+                  for g1,d1 in next,c do
+                    local tv=tables[d1[2]]
+                    if tv then
+                      d1[2]=tv
+                    end
+                  end
+                end
+              elseif kind=="gpos_mark2ligature" then
+                local c=step.baseclasses
+                if c then
+                  for g1,d1 in next,c do
+                    for g2,d2 in next,d1 do
+                      local tv=tables[d2] 
+                      if tv then
+                        d2=tv
+                        d1[g2]=d2
+                      end
+                      for g3,d3 in next,d2 do
+                        local tv=tables[d2[g3]]
+                        if tv then
+                          d2[g3]=tv
+                        end
+                      end
+                    end
+                  end
+                end
+                local c=step.coverage
+                if c then
+                  for g1,d1 in next,c do
+                    local tv=tables[d1[2]]
+                    if tv then
+                      d1[2]=tv
+                    end
+                  end
+                end
+              end
+              local rules=step.rules
+              if rules then
+                for i=1,#rules do
+                  local rule=rules[i]
+                  local before=rule.before
+                  if before then
+                    local tv=tables[before]
+                    if tv then
+                      rule.before=tv
+                      before=tv
+                    end
+                    for i=1,#before do
+                      local tv=tables[before[i]]
+                      if tv then
+                        before[i]=tv
+                      end
+                    end
+                  end
+                  local after=rule.after
+                  if after then
+                    local tv=tables[after]
+                    if tv then
+                      rule.after=tv
+                      after=tv
+                    end
+                    for i=1,#after do
+                      local tv=tables[after[i]]
+                      if tv then
+                        after[i]=tv
+                      end
+                    end
+                  end
+                  local current=rule.current
+                  if current then
+                    local tv=tables[current]
+                    if tv then
+                      rule.current=tv
+                      current=tv
+                    end
+                    for i=1,#current do
+                      local tv=tables[current[i]]
+                      if tv then
+                        current[i]=tv
+                      end
+                    end
+                  end
+                  local replacements=rule.replacements
+                  if replacements then
+                    local tv=tables[replacements]
+                    if tv then
+                      rule.replacements=tv
+                    end
+                  end
+                end
+              end
+            end
+          end
+          if order then
+            local tv=tables[order]
+            if tv then
+              sequence.order=tv
+            end
+          end
+          if flags then
+            local tv=tables[flags]
+            if tv then
+              sequence.flags=tv
+            end
+          end
+        end
+      end
+      if sequences then
+        unpackthem(sequences)
+      end
+      if sublookups then
+        unpackthem(sublookups)
+      end
+      if features then
+        for k,list in next,features do
+          for feature,spec in next,list do
+            local tv=tables[spec]
+            if tv then
+              list[feature]=tv
+            end
+          end
+        end
+      end
+      if palettes then
+        for i=1,#palettes do
+          local p=palettes[i]
+          for j=1,#p do
+            local tv=tables[p[j]]
+            if tv then
+              p[j]=tv
+            end
+          end
+        end
+      end
+      if variable then
+        local instances=variable.instances
+        if instances then
+          for i=1,#instances do
+            local v=instances[i].values
+            for j=1,#v do
+              local tv=tables[v[j]]
+              if tv then
+                v[j]=tv
+              end
+            end
+          end
+        end
+        local function unpackdeltas(main)
+          if main then
+            local deltas=main.deltas
+            if deltas then
+              for i=1,#deltas do
+                local di=deltas[i]
+                local d=di.deltas
+                local r=di.regions
+                for j=1,#d do
+                  local tv=tables[d[j]]
+                  if tv then
+                    d[j]=tv
+                  end
+                end
+                local tv=di.regions
+                if tv then
+                  di.regions=tv
+                end
+              end
+            end
+            local regions=main.regions
+            if regions then
+              local tv=tables[regions]
+              if tv then
+                main.regions=tv
+                regions=tv
+              end
+              for i=1,#regions do
+                local r=regions[i]
+                for j=1,#r do
+                  local tv=tables[r[j]]
+                  if tv then
+                    r[j]=tv
+                  end
+                end
+              end
+            end
+          end
+        end
+        unpackdeltas(variable.global)
+        unpackdeltas(variable.horizontal)
+        unpackdeltas(variable.vertical)
+        unpackdeltas(variable.metrics)
+      end
+      data.tables=nil
+    end
+  end
+end
+local mt={
+  __index=function(t,k) 
+    if k=="height" then
+      local ht=t.boundingbox[4]
+      return ht<0 and 0 or ht
+    elseif k=="depth" then
+      local dp=-t.boundingbox[2]
+      return dp<0 and 0 or dp
+    elseif k=="width" then
+      return 0
+    elseif k=="name" then 
+      return forcenotdef and ".notdef"
+    end
+  end
+}
+local function sameformat(sequence,steps,first,nofsteps,kind)
+  return true
+end
+local function mergesteps_1(lookup,strict)
+  local steps=lookup.steps
+  local nofsteps=lookup.nofsteps
+  local first=steps[1]
+  if strict then
+    local f=first.format
+    for i=2,nofsteps do
+      if steps[i].format~=f then
+        report("not merging %a steps of %a lookup %a, different formats",nofsteps,lookup.type,lookup.name)
+        return 0
+      end
+    end
+  end
+  report("merging %a steps of %a lookup %a",nofsteps,lookup.type,lookup.name)
+  local target=first.coverage
+  for i=2,nofsteps do
+    for k,v in next,steps[i].coverage do
+      if not target[k] then
+        target[k]=v
+      end
+    end
+  end
+  lookup.nofsteps=1
+  lookup.merged=true
+  lookup.steps={ first }
+  return nofsteps-1
+end
+local function mergesteps_2(lookup)
+  local steps=lookup.steps
+  local nofsteps=lookup.nofsteps
+  local first=steps[1]
+  if strict then
+    local f=first.format
+    for i=2,nofsteps do
+      if steps[i].format~=f then
+        report("not merging %a steps of %a lookup %a, different formats",nofsteps,lookup.type,lookup.name)
+        return 0
+      end
+    end
+  end
+  report("merging %a steps of %a lookup %a",nofsteps,lookup.type,lookup.name)
+  local target=first.coverage
+  for i=2,nofsteps do
+    for k,v in next,steps[i].coverage do
+      local tk=target[k]
+      if tk then
+        for kk,vv in next,v do
+          if tk[kk]==nil then
+            tk[kk]=vv
+          end
+        end
+      else
+        target[k]=v
+      end
+    end
+  end
+  lookup.nofsteps=1
+  lookup.merged=true
+  lookup.steps={ first }
+  return nofsteps-1
+end
+local function mergesteps_3(lookup,strict) 
+  local steps=lookup.steps
+  local nofsteps=lookup.nofsteps
+  report("merging %a steps of %a lookup %a",nofsteps,lookup.type,lookup.name)
+  local coverage={}
+  for i=1,nofsteps do
+    for k,v in next,steps[i].coverage do
+      local tk=coverage[k] 
+      if tk then
+        report("quitting merge due to multiple checks")
+        return nofsteps
+      else
+        coverage[k]=v
+      end
+    end
+  end
+  local first=steps[1]
+  local baseclasses={} 
+  for i=1,nofsteps do
+    local offset=i*10 
+    local step=steps[i]
+    for k,v in sortedhash(step.baseclasses) do
+      baseclasses[offset+k]=v
+    end
+    for k,v in next,step.coverage do
+      v[1]=offset+v[1]
+    end
+  end
+  first.baseclasses=baseclasses
+  first.coverage=coverage
+  lookup.nofsteps=1
+  lookup.merged=true
+  lookup.steps={ first }
+  return nofsteps-1
+end
+local function nested(old,new)
+  for k,v in next,old do
+    if k=="ligature" then
+      if not new.ligature then
+        new.ligature=v
+      end
+    else
+      local n=new[k]
+      if n then
+        nested(v,n)
+      else
+        new[k]=v
+      end
+    end
+  end
+end
+local function mergesteps_4(lookup) 
+  local steps=lookup.steps
+  local nofsteps=lookup.nofsteps
+  local first=steps[1]
+  report("merging %a steps of %a lookup %a",nofsteps,lookup.type,lookup.name)
+  local target=first.coverage
+  for i=2,nofsteps do
+    for k,v in next,steps[i].coverage do
+      local tk=target[k]
+      if tk then
+        nested(v,tk)
+      else
+        target[k]=v
+      end
+    end
+  end
+  lookup.nofsteps=1
+  lookup.steps={ first }
+  return nofsteps-1
+end
+local function mergesteps_5(lookup) 
+  local steps=lookup.steps
+  local nofsteps=lookup.nofsteps
+  local first=steps[1]
+  report("merging %a steps of %a lookup %a",nofsteps,lookup.type,lookup.name)
+  local target=first.coverage
+  local hash=nil
+  for k,v in next,target do
+    hash=v[1]
+    break
+  end
+  for i=2,nofsteps do
+    for k,v in next,steps[i].coverage do
+      local tk=target[k]
+      if tk then
+        if not tk[2] then
+          tk[2]=v[2]
+        end
+        if not tk[3] then
+          tk[3]=v[3]
+        end
+      else
+        target[k]=v
+        v[1]=hash
+      end
+    end
+  end
+  lookup.nofsteps=1
+  lookup.merged=true
+  lookup.steps={ first }
+  return nofsteps-1
+end
+local function checkkerns(lookup)
+  local steps=lookup.steps
+  local nofsteps=lookup.nofsteps
+  local kerned=0
+  for i=1,nofsteps do
+    local step=steps[i]
+    if step.format=="pair" then
+      local coverage=step.coverage
+      local kerns=true
+      for g1,d1 in next,coverage do
+        if d1==true then
+        elseif not d1 then
+        elseif d1[1]~=0 or d1[2]~=0 or d1[4]~=0 then
+          kerns=false
+          break
+        end
+      end
+      if kerns then
+        report("turning pairs of step %a of %a lookup %a into kerns",i,lookup.type,lookup.name)
+        local c={}
+        for g1,d1 in next,coverage do
+          if d1 and d1~=true then
+            c[g1]=d1[3]
+          end
+        end
+        step.coverage=c
+        step.format="move"
+        kerned=kerned+1
+      end
+    end
+  end
+  return kerned
+end
+local function checkpairs(lookup)
+  local steps=lookup.steps
+  local nofsteps=lookup.nofsteps
+  local kerned=0
+  local function onlykerns(step)
+    local coverage=step.coverage
+    for g1,d1 in next,coverage do
+      for g2,d2 in next,d1 do
+        if d2[2] then
+          return false
+        else
+          local v=d2[1]
+          if v==true then
+          elseif v and (v[1]~=0 or v[2]~=0 or v[4]~=0) then
+            return false
+          end
+        end
+      end
+    end
+    return coverage
+  end
+  for i=1,nofsteps do
+    local step=steps[i]
+    if step.format=="pair" then
+      local coverage=onlykerns(step)
+      if coverage then
+        report("turning pairs of step %a of %a lookup %a into kerns",i,lookup.type,lookup.name)
+        for g1,d1 in next,coverage do
+          local d={}
+          for g2,d2 in next,d1 do
+            local v=d2[1]
+            if v==true then
+            elseif v then
+              d[g2]=v[3] 
+            end
+          end
+          coverage[g1]=d
+        end
+        step.format="move"
+        kerned=kerned+1
+      end
+    end
+  end
+  return kerned
+end
+local compact_pairs=true
+local compact_singles=true
+local merge_pairs=true
+local merge_singles=true
+local merge_substitutions=true
+local merge_alternates=true
+local merge_multiples=true
+local merge_ligatures=true
+local merge_cursives=true
+local merge_marks=true
+directives.register("otf.compact.pairs",function(v) compact_pairs=v end)
+directives.register("otf.compact.singles",function(v) compact_singles=v end)
+directives.register("otf.merge.pairs",function(v) merge_pairs=v end)
+directives.register("otf.merge.singles",function(v) merge_singles=v end)
+directives.register("otf.merge.substitutions",function(v) merge_substitutions=v end)
+directives.register("otf.merge.alternates",function(v) merge_alternates=v end)
+directives.register("otf.merge.multiples",function(v) merge_multiples=v end)
+directives.register("otf.merge.ligatures",function(v) merge_ligatures=v end)
+directives.register("otf.merge.cursives",function(v) merge_cursives=v end)
+directives.register("otf.merge.marks",function(v) merge_marks=v end)
+function readers.compact(data)
+  if not data or data.compacted then
+    return
+  else
+    data.compacted=true
+  end
+  local resources=data.resources
+  local merged=0
+  local kerned=0
+  local allsteps=0
+  local function compact(what)
+    local lookups=resources[what]
+    if lookups then
+      for i=1,#lookups do
+        local lookup=lookups[i]
+        local nofsteps=lookup.nofsteps
+        local kind=lookup.type
+        allsteps=allsteps+nofsteps
+        if nofsteps>1 then
+          local merg=merged
+          if kind=="gsub_single" then
+            if merge_substitutions then
+              merged=merged+mergesteps_1(lookup)
+            end
+          elseif kind=="gsub_alternate" then
+            if merge_alternates then
+              merged=merged+mergesteps_1(lookup)
+            end
+          elseif kind=="gsub_multiple" then
+            if merge_multiples then
+              merged=merged+mergesteps_1(lookup)
+            end
+          elseif kind=="gsub_ligature" then
+            if merge_ligatures then
+              merged=merged+mergesteps_4(lookup)
+            end
+          elseif kind=="gpos_single" then
+            if merge_singles then
+              merged=merged+mergesteps_1(lookup,true)
+            end
+            if compact_singles then
+              kerned=kerned+checkkerns(lookup)
+            end
+          elseif kind=="gpos_pair" then
+            if merge_pairs then
+              merged=merged+mergesteps_2(lookup)
+            end
+            if compact_pairs then
+              kerned=kerned+checkpairs(lookup)
+            end
+          elseif kind=="gpos_cursive" then
+            if merge_cursives then
+              merged=merged+mergesteps_5(lookup)
+            end
+          elseif kind=="gpos_mark2mark" or kind=="gpos_mark2base" or kind=="gpos_mark2ligature" then
+            if merge_marks then
+              merged=merged+mergesteps_3(lookup)
+            end
+          end
+          if merg~=merged then
+            lookup.merged=true
+          end
+        elseif nofsteps==1 then
+          local kern=kerned
+          if kind=="gpos_single" then
+            if compact_singles then
+              kerned=kerned+checkkerns(lookup)
+            end
+          elseif kind=="gpos_pair" then
+            if compact_pairs then
+              kerned=kerned+checkpairs(lookup)
+            end
+          end
+          if kern~=kerned then
+          end
+        end
+      end
+    else
+      report("no lookups in %a",what)
+    end
+  end
+  compact("sequences")
+  compact("sublookups")
+  if merged>0 then
+    report("%i steps of %i removed due to merging",merged,allsteps)
+  end
+  if kerned>0 then
+    report("%i steps of %i steps turned from pairs into kerns",kerned,allsteps)
+  end
+end
+local function mergesteps(t,k)
+  if k=="merged" then
+    local merged={}
+    for i=1,#t do
+      local step=t[i]
+      local coverage=step.coverage
+      for k in next,coverage do
+        local m=merged[k]
+        if m then
+          m[2]=i
+        else
+          merged[k]={ i,i }
+        end
+      end
+    end
+    t.merged=merged
+    return merged
+  end
+end
+local function checkmerge(sequence)
+  local steps=sequence.steps
+  if steps then
+    setmetatableindex(steps,mergesteps)
+  end
+end
+local function checkflags(sequence,resources)
+  if not sequence.skiphash then
+    local flags=sequence.flags
+    if flags then
+      local skipmark=flags[1]
+      local skipligature=flags[2]
+      local skipbase=flags[3]
+      local markclass=sequence.markclass
+      local skipsome=skipmark or skipligature or skipbase or markclass or false
+      if skipsome then
+        sequence.skiphash=setmetatableindex(function(t,k)
+          local c=resources.classes[k] 
+          local v=c==skipmark
+              or (markclass and c=="mark" and not markclass[k])
+              or c==skipligature
+              or c==skipbase
+              or false
+          t[k]=v
+          return v
+        end)
+      else
+        sequence.skiphash=false
+      end
+    else
+      sequence.skiphash=false
+    end
+  end
+end
+local function checksteps(sequence)
+  local steps=sequence.steps
+  if steps then
+    for i=1,#steps do
+      steps[i].index=i
+    end
+  end
+end
+if fonts.helpers then
+  fonts.helpers.checkmerge=checkmerge
+  fonts.helpers.checkflags=checkflags
+  fonts.helpers.checksteps=checksteps 
+end
+function readers.expand(data)
+  if not data or data.expanded then
+    return
+  else
+    data.expanded=true
+  end
+  local resources=data.resources
+  local sublookups=resources.sublookups
+  local sequences=resources.sequences 
+  local markclasses=resources.markclasses
+  local descriptions=data.descriptions
+  if descriptions then
+    local defaultwidth=resources.defaultwidth or 0
+    local defaultheight=resources.defaultheight or 0
+    local defaultdepth=resources.defaultdepth or 0
+    local basename=trace_markwidth and file.basename(resources.filename)
+    for u,d in next,descriptions do
+      local bb=d.boundingbox
+      local wd=d.width
+      if not wd then
+        d.width=defaultwidth
+      elseif trace_markwidth and wd~=0 and d.class=="mark" then
+        report("mark %a with width %b found in %a",d.name or "<noname>",wd,basename)
+      end
+      if bb then
+        local ht=bb[4]
+        local dp=-bb[2]
+        if ht==0 or ht<0 then
+        else
+          d.height=ht
+        end
+        if dp==0 or dp<0 then
+        else
+          d.depth=dp
+        end
+      end
+    end
+  end
+  local function expandlookups(sequences)
+    if sequences then
+      for i=1,#sequences do
+        local sequence=sequences[i]
+        local steps=sequence.steps
+        if steps then
+          local nofsteps=sequence.nofsteps
+          local kind=sequence.type
+          local markclass=sequence.markclass
+          if markclass then
+            if not markclasses then
+              report_warning("missing markclasses")
+              sequence.markclass=false
+            else
+              sequence.markclass=markclasses[markclass]
+            end
+          end
+          checkmerge(sequence)
+          checkflags(sequence,resources)
+          checksteps(sequence)
+          for i=1,nofsteps do
+            local step=steps[i]
+            local baseclasses=step.baseclasses
+            if baseclasses then
+              local coverage=step.coverage
+              for k,v in next,coverage do
+                v[1]=baseclasses[v[1]] 
+              end
+            elseif kind=="gpos_cursive" then
+              local coverage=step.coverage
+              for k,v in next,coverage do
+                v[1]=coverage 
+              end
+            end
+            local rules=step.rules
+            if rules then
+              local rulehash={}
+              local rulesize=0
+              local coverage={}
+              local lookuptype=sequence.type
+              step.coverage=coverage 
+              for nofrules=1,#rules do
+                local rule=rules[nofrules]
+                local current=rule.current
+                local before=rule.before
+                local after=rule.after
+                local replacements=rule.replacements or false
+                local sequence={}
+                local nofsequences=0
+                if before then
+                  for n=1,#before do
+                    nofsequences=nofsequences+1
+                    sequence[nofsequences]=before[n]
+                  end
+                end
+                local start=nofsequences+1
+                for n=1,#current do
+                  nofsequences=nofsequences+1
+                  sequence[nofsequences]=current[n]
+                end
+                local stop=nofsequences
+                if after then
+                  for n=1,#after do
+                    nofsequences=nofsequences+1
+                    sequence[nofsequences]=after[n]
+                  end
+                end
+                local lookups=rule.lookups or false
+                local subtype=nil
+                if lookups then
+                  for i=1,#lookups do
+                    local lookups=lookups[i]
+                    if lookups then
+                      for k,v in next,lookups do
+                        local lookup=sublookups[v]
+                        if lookup then
+                          lookups[k]=lookup
+                          if not subtype then
+                            subtype=lookup.type
+                          end
+                        else
+                        end
+                      end
+                    end
+                  end
+                end
+                if sequence[1] then 
+                  sequence.n=#sequence 
+                  rulesize=rulesize+1
+                  rulehash[rulesize]={
+                    nofrules,
+                    lookuptype,
+                    sequence,
+                    start,
+                    stop,
+                    lookups,
+                    replacements,
+                    subtype,
+                  }
+                  for unic in next,sequence[start] do
+                    local cu=coverage[unic]
+                    if not cu then
+                      coverage[unic]=rulehash 
+                    else
+                    end
+                  end
+                end
+                rulehash.n=#rulehash 
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+  expandlookups(sequences)
+  expandlookups(sublookups)
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-otl']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files",
+}
+local lower=string.lower
+local type,next,tonumber,tostring,unpack=type,next,tonumber,tostring,unpack
+local abs=math.abs
+local derivetable=table.derive
+local formatters=string.formatters
+local setmetatableindex=table.setmetatableindex
+local allocate=utilities.storage.allocate
+local registertracker=trackers.register
+local registerdirective=directives.register
+local starttiming=statistics.starttiming
+local stoptiming=statistics.stoptiming
+local elapsedtime=statistics.elapsedtime
+local findbinfile=resolvers.findbinfile
+local trace_loading=false registertracker("otf.loading",function(v) trace_loading=v end)
+local trace_features=false registertracker("otf.features",function(v) trace_features=v end)
+local trace_defining=false registertracker("fonts.defining",function(v) trace_defining=v end)
+local report_otf=logs.reporter("fonts","otf loading")
+local fonts=fonts
+local otf=fonts.handlers.otf
+otf.version=3.102 
+otf.cache=containers.define("fonts","otl",otf.version,true)
+otf.svgcache=containers.define("fonts","svg",otf.version,true)
+otf.sbixcache=containers.define("fonts","sbix",otf.version,true)
+otf.pdfcache=containers.define("fonts","pdf",otf.version,true)
+otf.svgenabled=false
+otf.sbixenabled=false
+local otfreaders=otf.readers
+local hashes=fonts.hashes
+local definers=fonts.definers
+local readers=fonts.readers
+local constructors=fonts.constructors
+local otffeatures=constructors.features.otf
+local registerotffeature=otffeatures.register
+local otfenhancers=constructors.enhancers.otf
+local registerotfenhancer=otfenhancers.register
+local forceload=false
+local cleanup=0   
+local syncspace=true
+local forcenotdef=false
+local privateoffset=fonts.constructors and fonts.constructors.privateoffset or 0xF0000 
+local applyruntimefixes=fonts.treatments and fonts.treatments.applyfixes
+local wildcard="*"
+local default="dflt"
+local formats=fonts.formats
+formats.otf="opentype"
+formats.ttf="truetype"
+formats.ttc="truetype"
+registerdirective("fonts.otf.loader.cleanup",function(v) cleanup=tonumber(v) or (v and 1) or 0 end)
+registerdirective("fonts.otf.loader.force",function(v) forceload=v end)
+registerdirective("fonts.otf.loader.syncspace",function(v) syncspace=v end)
+registerdirective("fonts.otf.loader.forcenotdef",function(v) forcenotdef=v end)
+registerotfenhancer("check extra features",function() end)
+local checkmemory=utilities.lua and utilities.lua.checkmemory
+local threshold=100 
+local tracememory=false
+registertracker("fonts.otf.loader.memory",function(v) tracememory=v end)
+if not checkmemory then 
+  local collectgarbage=collectgarbage
+  checkmemory=function(previous,threshold) 
+    local current=collectgarbage("count")
+    if previous then
+      local checked=(threshold or 64)*1024
+      if current-previous>checked then
+        collectgarbage("collect")
+        current=collectgarbage("count")
+      end
+    end
+    return current
+  end
+end
+function otf.load(filename,sub,instance)
+  local base=file.basename(file.removesuffix(filename))
+  local name=file.removesuffix(base) 
+  local attr=lfs.attributes(filename)
+  local size=attr and attr.size or 0
+  local time=attr and attr.modification or 0
+  if sub=="" then
+    sub=false
+  end
+  local hash=name
+  if sub then
+    hash=hash.."-"..sub
+  end
+  if instance then
+    hash=hash.."-"..instance
+  end
+  hash=containers.cleanname(hash)
+  local data=containers.read(otf.cache,hash)
+  local reload=not data or data.size~=size or data.time~=time or data.tableversion~=otfreaders.tableversion
+  if forceload then
+    report_otf("forced reload of %a due to hard coded flag",filename)
+    reload=true
+  end
+   if reload then
+    report_otf("loading %a, hash %a",filename,hash)
+    starttiming(otfreaders)
+    data=otfreaders.loadfont(filename,sub or 1,instance) 
+    if data then
+      local used=checkmemory()
+      local resources=data.resources
+      local svgshapes=resources.svgshapes
+      local sbixshapes=resources.sbixshapes
+      if cleanup==0 then
+        checkmemory(used,threshold,tracememory)
+      end
+      if svgshapes then
+        resources.svgshapes=nil
+        if otf.svgenabled then
+          local timestamp=os.date()
+          containers.write(otf.svgcache,hash,{
+            svgshapes=svgshapes,
+            timestamp=timestamp,
+          })
+          data.properties.svg={
+            hash=hash,
+            timestamp=timestamp,
+          }
+        end
+        if cleanup>1 then
+          collectgarbage("collect")
+        else
+          checkmemory(used,threshold,tracememory)
+        end
+      end
+      if sbixshapes then
+        resources.sbixshapes=nil
+        if otf.sbixenabled then
+          local timestamp=os.date()
+          containers.write(otf.sbixcache,hash,{
+            sbixshapes=sbixshapes,
+            timestamp=timestamp,
+          })
+          data.properties.sbix={
+            hash=hash,
+            timestamp=timestamp,
+          }
+        end
+        if cleanup>1 then
+          collectgarbage("collect")
+        else
+          checkmemory(used,threshold,tracememory)
+        end
+      end
+      otfreaders.compact(data)
+      if cleanup==0 then
+        checkmemory(used,threshold,tracememory)
+      end
+      otfreaders.rehash(data,"unicodes")
+      otfreaders.addunicodetable(data)
+      otfreaders.extend(data)
+      if cleanup==0 then
+        checkmemory(used,threshold,tracememory)
+      end
+      otfreaders.pack(data)
+      report_otf("loading done")
+      report_otf("saving %a in cache",filename)
+      data=containers.write(otf.cache,hash,data)
+      if cleanup>1 then
+        collectgarbage("collect")
+      else
+        checkmemory(used,threshold,tracememory)
+      end
+      stoptiming(otfreaders)
+      if elapsedtime then
+        report_otf("loading, optimizing, packing and caching time %s",elapsedtime(otfreaders))
+      end
+      if cleanup>3 then
+        collectgarbage("collect")
+      else
+        checkmemory(used,threshold,tracememory)
+      end
+      data=containers.read(otf.cache,hash) 
+      if cleanup>2 then
+        collectgarbage("collect")
+      else
+        checkmemory(used,threshold,tracememory)
+      end
+    else
+      data=nil
+      report_otf("loading failed due to read error")
+    end
+  end
+  if data then
+    if trace_defining then
+      report_otf("loading from cache using hash %a",hash)
+    end
+    otfreaders.unpack(data)
+    otfreaders.expand(data) 
+    otfreaders.addunicodetable(data)
+    otfenhancers.apply(data,filename,data)
+    if applyruntimefixes then
+      applyruntimefixes(filename,data) 
+    end
+    data.metadata.math=data.resources.mathconstants
+    local classes=data.resources.classes
+    if not classes then
+      local descriptions=data.descriptions
+      classes=setmetatableindex(function(t,k)
+        local d=descriptions[k]
+        local v=(d and d.class or "base") or false
+        t[k]=v
+        return v
+      end)
+      data.resources.classes=classes
+    end
+  end
+  return data
+end
+function otf.setfeatures(tfmdata,features)
+  local okay=constructors.initializefeatures("otf",tfmdata,features,trace_features,report_otf)
+  if okay then
+    return constructors.collectprocessors("otf",tfmdata,features,trace_features,report_otf)
+  else
+    return {} 
+  end
+end
+local function copytotfm(data,cache_id)
+  if data then
+    local metadata=data.metadata
+    local properties=derivetable(data.properties)
+    local descriptions=derivetable(data.descriptions)
+    local goodies=derivetable(data.goodies)
+    local characters={}
+    local parameters={}
+    local mathparameters={}
+    local resources=data.resources
+    local unicodes=resources.unicodes
+    local spaceunits=500
+    local spacer="space"
+    local designsize=metadata.designsize or 100
+    local minsize=metadata.minsize or designsize
+    local maxsize=metadata.maxsize or designsize
+    local mathspecs=metadata.math
+    if designsize==0 then
+      designsize=100
+      minsize=100
+      maxsize=100
+    end
+    if mathspecs then
+      for name,value in next,mathspecs do
+        mathparameters[name]=value
+      end
+    end
+    for unicode in next,data.descriptions do 
+      characters[unicode]={}
+    end
+    if mathspecs then
+      for unicode,character in next,characters do
+        local d=descriptions[unicode] 
+        local m=d.math
+        if m then
+          local italic=m.italic
+          local vitalic=m.vitalic
+          local variants=m.hvariants
+          local parts=m.hparts
+          if variants then
+            local c=character
+            for i=1,#variants do
+              local un=variants[i]
+              c.next=un
+              c=characters[un]
+            end 
+            c.horiz_variants=parts
+          elseif parts then
+            character.horiz_variants=parts
+            italic=m.hitalic
+          end
+          local variants=m.vvariants
+          local parts=m.vparts
+          if variants then
+            local c=character
+            for i=1,#variants do
+              local un=variants[i]
+              c.next=un
+              c=characters[un]
+            end 
+            c.vert_variants=parts
+          elseif parts then
+            character.vert_variants=parts
+          end
+          if italic and italic~=0 then
+            character.italic=italic
+          end
+          if vitalic and vitalic~=0 then
+            character.vert_italic=vitalic
+          end
+          local accent=m.accent 
+          if accent then
+            character.accent=accent
+          end
+          local kerns=m.kerns
+          if kerns then
+            character.mathkerns=kerns
+          end
+        end
+      end
+    end
+    local filename=constructors.checkedfilename(resources)
+    local fontname=metadata.fontname
+    local fullname=metadata.fullname or fontname
+    local psname=fontname or fullname
+    local units=metadata.units or 1000
+    if units==0 then 
+      units=1000 
+      metadata.units=1000
+      report_otf("changing %a units to %a",0,units)
+    end
+    local monospaced=metadata.monospaced
+    local charwidth=metadata.averagewidth 
+    local charxheight=metadata.xheight 
+    local italicangle=metadata.italicangle
+    local hasitalics=metadata.hasitalics
+    properties.monospaced=monospaced
+    properties.hasitalics=hasitalics
+    parameters.italicangle=italicangle
+    parameters.charwidth=charwidth
+    parameters.charxheight=charxheight
+    local space=0x0020
+    local emdash=0x2014
+    if monospaced then
+      if descriptions[space] then
+        spaceunits,spacer=descriptions[space].width,"space"
+      end
+      if not spaceunits and descriptions[emdash] then
+        spaceunits,spacer=descriptions[emdash].width,"emdash"
+      end
+      if not spaceunits and charwidth then
+        spaceunits,spacer=charwidth,"charwidth"
+      end
+    else
+      if descriptions[space] then
+        spaceunits,spacer=descriptions[space].width,"space"
+      end
+      if not spaceunits and descriptions[emdash] then
+        spaceunits,spacer=descriptions[emdash].width/2,"emdash/2"
+      end
+      if not spaceunits and charwidth then
+        spaceunits,spacer=charwidth,"charwidth"
+      end
+    end
+    spaceunits=tonumber(spaceunits) or units/2
+    parameters.slant=0
+    parameters.space=spaceunits      
+    parameters.space_stretch=1*units/2  
+    parameters.space_shrink=1*units/3  
+    parameters.x_height=2*units/5  
+    parameters.quad=units    
+    if spaceunits<2*units/5 then
+    end
+    if italicangle and italicangle~=0 then
+      parameters.italicangle=italicangle
+      parameters.italicfactor=math.cos(math.rad(90+italicangle))
+      parameters.slant=- math.tan(italicangle*math.pi/180)
+    end
+    if monospaced then
+      parameters.space_stretch=0
+      parameters.space_shrink=0
+    elseif syncspace then 
+      parameters.space_stretch=spaceunits/2
+      parameters.space_shrink=spaceunits/3
+    end
+    parameters.extra_space=parameters.space_shrink 
+    if charxheight then
+      parameters.x_height=charxheight
+    else
+      local x=0x0078
+      if x then
+        local x=descriptions[x]
+        if x then
+          parameters.x_height=x.height
+        end
+      end
+    end
+    parameters.designsize=(designsize/10)*65536
+    parameters.minsize=(minsize/10)*65536
+    parameters.maxsize=(maxsize/10)*65536
+    parameters.ascender=abs(metadata.ascender or 0)
+    parameters.descender=abs(metadata.descender or 0)
+    parameters.units=units
+    properties.space=spacer
+    properties.encodingbytes=2
+    properties.format=data.format or formats.otf
+    properties.noglyphnames=true
+    properties.filename=filename
+    properties.fontname=fontname
+    properties.fullname=fullname
+    properties.psname=psname
+    properties.name=filename or fullname
+    properties.private=properties.private or data.private or privateoffset
+    return {
+      characters=characters,
+      descriptions=descriptions,
+      parameters=parameters,
+      mathparameters=mathparameters,
+      resources=resources,
+      properties=properties,
+      goodies=goodies,
+    }
+  end
+end
+local converters={
+  woff={
+    cachename="webfonts",
+    action=otf.readers.woff2otf,
+  }
+}
+local function checkconversion(specification)
+  local filename=specification.filename
+  local converter=converters[lower(file.suffix(filename))]
+  if converter then
+    local base=file.basename(filename)
+    local name=file.removesuffix(base)
+    local attr=lfs.attributes(filename)
+    local size=attr and attr.size or 0
+    local time=attr and attr.modification or 0
+    if size>0 then
+      local cleanname=containers.cleanname(name)
+      local cachename=caches.setfirstwritablefile(cleanname,converter.cachename)
+      if not io.exists(cachename) or (time~=lfs.attributes(cachename).modification) then
+        report_otf("caching font %a in %a",filename,cachename)
+        converter.action(filename,cachename) 
+        lfs.touch(cachename,time,time)
+      end
+      specification.filename=cachename
+    end
+  end
+end
+local function otftotfm(specification)
+  local cache_id=specification.hash
+  local tfmdata=containers.read(constructors.cache,cache_id)
+  if not tfmdata then
+    checkconversion(specification) 
+    local name=specification.name
+    local sub=specification.sub
+    local subindex=specification.subindex
+    local filename=specification.filename
+    local features=specification.features.normal
+    local instance=specification.instance or (features and features.axis)
+    local rawdata=otf.load(filename,sub,instance)
+    if rawdata and next(rawdata) then
+      local descriptions=rawdata.descriptions
+      rawdata.lookuphash={} 
+      tfmdata=copytotfm(rawdata,cache_id)
+      if tfmdata and next(tfmdata) then
+        local features=constructors.checkedfeatures("otf",features)
+        local shared=tfmdata.shared
+        if not shared then
+          shared={}
+          tfmdata.shared=shared
+        end
+        shared.rawdata=rawdata
+        shared.dynamics={}
+        tfmdata.changed={}
+        shared.features=features
+        shared.processes=otf.setfeatures(tfmdata,features)
+      end
+    end
+    containers.write(constructors.cache,cache_id,tfmdata)
+  end
+  return tfmdata
+end
+local function read_from_otf(specification)
+  local tfmdata=otftotfm(specification)
+  if tfmdata then
+    tfmdata.properties.name=specification.name
+    tfmdata.properties.sub=specification.sub
+    tfmdata=constructors.scale(tfmdata,specification)
+    local allfeatures=tfmdata.shared.features or specification.features.normal
+    constructors.applymanipulators("otf",tfmdata,allfeatures,trace_features,report_otf)
+    constructors.setname(tfmdata,specification) 
+    fonts.loggers.register(tfmdata,file.suffix(specification.filename),specification)
+  end
+  return tfmdata
+end
+local function checkmathsize(tfmdata,mathsize)
+  local mathdata=tfmdata.shared.rawdata.metadata.math
+  local mathsize=tonumber(mathsize)
+  if mathdata then 
+    local parameters=tfmdata.parameters
+    parameters.scriptpercentage=mathdata.ScriptPercentScaleDown
+    parameters.scriptscriptpercentage=mathdata.ScriptScriptPercentScaleDown
+    parameters.mathsize=mathsize 
+  end
+end
+registerotffeature {
+  name="mathsize",
+  description="apply mathsize specified in the font",
+  initializers={
+    base=checkmathsize,
+    node=checkmathsize,
+  }
+}
+function otf.collectlookups(rawdata,kind,script,language)
+  if not kind then
+    return
+  end
+  if not script then
+    script=default
+  end
+  if not language then
+    language=default
+  end
+  local lookupcache=rawdata.lookupcache
+  if not lookupcache then
+    lookupcache={}
+    rawdata.lookupcache=lookupcache
+  end
+  local kindlookup=lookupcache[kind]
+  if not kindlookup then
+    kindlookup={}
+    lookupcache[kind]=kindlookup
+  end
+  local scriptlookup=kindlookup[script]
+  if not scriptlookup then
+    scriptlookup={}
+    kindlookup[script]=scriptlookup
+  end
+  local languagelookup=scriptlookup[language]
+  if not languagelookup then
+    local sequences=rawdata.resources.sequences
+    local featuremap={}
+    local featurelist={}
+    if sequences then
+      for s=1,#sequences do
+        local sequence=sequences[s]
+        local features=sequence.features
+        if features then
+          features=features[kind]
+          if features then
+            features=features[script] or features[wildcard]
+            if features then
+              features=features[language] or features[wildcard]
+              if features then
+                if not featuremap[sequence] then
+                  featuremap[sequence]=true
+                  featurelist[#featurelist+1]=sequence
+                end
+              end
+            end
+          end
+        end
+      end
+      if #featurelist==0 then
+        featuremap,featurelist=false,false
+      end
+    else
+      featuremap,featurelist=false,false
+    end
+    languagelookup={ featuremap,featurelist }
+    scriptlookup[language]=languagelookup
+  end
+  return unpack(languagelookup)
+end
+local function getgsub(tfmdata,k,kind,value)
+  local shared=tfmdata.shared
+  local rawdata=shared and shared.rawdata
+  if rawdata then
+    local sequences=rawdata.resources.sequences
+    if sequences then
+      local properties=tfmdata.properties
+      local validlookups,lookuplist=otf.collectlookups(rawdata,kind,properties.script,properties.language)
+      if validlookups then
+        for i=1,#lookuplist do
+          local lookup=lookuplist[i]
+          local steps=lookup.steps
+          local nofsteps=lookup.nofsteps
+          for i=1,nofsteps do
+            local coverage=steps[i].coverage
+            if coverage then
+              local found=coverage[k]
+              if found then
+                return found,lookup.type
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+end
+otf.getgsub=getgsub 
+function otf.getsubstitution(tfmdata,k,kind,value)
+  local found,kind=getgsub(tfmdata,k,kind,value)
+  if not found then
+  elseif kind=="gsub_single" then
+    return found
+  elseif kind=="gsub_alternate" then
+    local choice=tonumber(value) or 1 
+    return found[choice] or found[1] or k
+  end
+  return k
+end
+otf.getalternate=otf.getsubstitution
+function otf.getmultiple(tfmdata,k,kind)
+  local found,kind=getgsub(tfmdata,k,kind)
+  if found and kind=="gsub_multiple" then
+    return found
+  end
+  return { k }
+end
+function otf.getkern(tfmdata,left,right,kind)
+  local kerns=getgsub(tfmdata,left,kind or "kern",true) 
+  if kerns then
+    local found=kerns[right]
+    local kind=type(found)
+    if kind=="table" then
+      found=found[1][3] 
+    elseif kind~="number" then
+      found=false
+    end
+    if found then
+      return found*tfmdata.parameters.factor
+    end
+  end
+  return 0
+end
+local function check_otf(forced,specification,suffix)
+  local name=specification.name
+  if forced then
+    name=specification.forcedname 
+  end
+  local fullname=findbinfile(name,suffix) or ""
+  if fullname=="" then
+    fullname=fonts.names.getfilename(name,suffix) or ""
+  end
+  if fullname~="" and not fonts.names.ignoredfile(fullname) then
+    specification.filename=fullname
+    return read_from_otf(specification)
+  end
+end
+local function opentypereader(specification,suffix)
+  local forced=specification.forced or ""
+  if formats[forced] then
+    return check_otf(true,specification,forced)
+  else
+    return check_otf(false,specification,suffix)
+  end
+end
+readers.opentype=opentypereader 
+function readers.otf(specification) return opentypereader(specification,"otf") end
+function readers.ttf(specification) return opentypereader(specification,"ttf") end
+function readers.ttc(specification) return opentypereader(specification,"ttf") end
+function readers.woff(specification)
+  checkconversion(specification)
+  opentypereader(specification,"")
+end
+function otf.scriptandlanguage(tfmdata,attr)
+  local properties=tfmdata.properties
+  return properties.script or "dflt",properties.language or "dflt"
+end
+local function justset(coverage,unicode,replacement)
+  coverage[unicode]=replacement
+end
+otf.coverup={
+  stepkey="steps",
+  actions={
+    chainsubstitution=justset,
+    chainposition=justset,
+    substitution=justset,
+    alternate=justset,
+    multiple=justset,
+    kern=justset,
+    pair=justset,
+    single=justset,
+    ligature=function(coverage,unicode,ligature)
+      local first=ligature[1]
+      local tree=coverage[first]
+      if not tree then
+        tree={}
+        coverage[first]=tree
+      end
+      for i=2,#ligature do
+        local l=ligature[i]
+        local t=tree[l]
+        if not t then
+          t={}
+          tree[l]=t
+        end
+        tree=t
+      end
+      tree.ligature=unicode
+    end,
+  },
+  register=function(coverage,featuretype,format)
+    return {
+      format=format,
+      coverage=coverage,
+    }
+  end
+}
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-oto']={ 
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local concat,unpack=table.concat,table.unpack
+local insert,remove=table.insert,table.remove
+local format,gmatch,gsub,find,match,lower,strip=string.format,string.gmatch,string.gsub,string.find,string.match,string.lower,string.strip
+local type,next,tonumber,tostring,rawget=type,next,tonumber,tostring,rawget
+local trace_baseinit=false trackers.register("otf.baseinit",function(v) trace_baseinit=v end)
+local trace_singles=false trackers.register("otf.singles",function(v) trace_singles=v end)
+local trace_multiples=false trackers.register("otf.multiples",function(v) trace_multiples=v end)
+local trace_alternatives=false trackers.register("otf.alternatives",function(v) trace_alternatives=v end)
+local trace_ligatures=false trackers.register("otf.ligatures",function(v) trace_ligatures=v end)
+local trace_kerns=false trackers.register("otf.kerns",function(v) trace_kerns=v end)
+local trace_preparing=false trackers.register("otf.preparing",function(v) trace_preparing=v end)
+local report_prepare=logs.reporter("fonts","otf prepare")
+local fonts=fonts
+local otf=fonts.handlers.otf
+local otffeatures=otf.features
+local registerotffeature=otffeatures.register
+otf.defaultbasealternate="none" 
+local getprivate=fonts.constructors.getprivate
+local wildcard="*"
+local default="dflt"
+local formatters=string.formatters
+local f_unicode=formatters["%U"]
+local f_uniname=formatters["%U (%s)"]
+local f_unilist=formatters["% t (% t)"]
+local function gref(descriptions,n)
+  if type(n)=="number" then
+    local name=descriptions[n].name
+    if name then
+      return f_uniname(n,name)
+    else
+      return f_unicode(n)
+    end
+  elseif n then
+    local num,nam,j={},{},0
+    for i=1,#n do
+      local ni=n[i]
+      if tonumber(ni) then 
+        j=j+1
+        local di=descriptions[ni]
+        num[j]=f_unicode(ni)
+        nam[j]=di and di.name or "-"
+      end
+    end
+    return f_unilist(num,nam)
+  else
+    return "<error in base mode tracing>"
+  end
+end
+local function cref(feature,sequence)
+  return formatters["feature %a, type %a, chain lookup %a"](feature,sequence.type,sequence.name)
+end
+local function report_substitution(feature,sequence,descriptions,unicode,substitution)
+  if unicode==substitution then
+    report_prepare("%s: base substitution %s maps onto itself",
+      cref(feature,sequence),
+      gref(descriptions,unicode))
+  else
+    report_prepare("%s: base substitution %s => %S",
+      cref(feature,sequence),
+      gref(descriptions,unicode),
+      gref(descriptions,substitution))
+  end
+end
+local function report_alternate(feature,sequence,descriptions,unicode,replacement,value,comment)
+  if unicode==replacement then
+    report_prepare("%s: base alternate %s maps onto itself",
+      cref(feature,sequence),
+      gref(descriptions,unicode))
+  else
+    report_prepare("%s: base alternate %s => %s (%S => %S)",
+      cref(feature,sequence),
+      gref(descriptions,unicode),
+      replacement and gref(descriptions,replacement),
+      value,
+      comment)
+  end
+end
+local function report_ligature(feature,sequence,descriptions,unicode,ligature)
+  report_prepare("%s: base ligature %s => %S",
+    cref(feature,sequence),
+    gref(descriptions,ligature),
+    gref(descriptions,unicode))
+end
+local function report_kern(feature,sequence,descriptions,unicode,otherunicode,value)
+  report_prepare("%s: base kern %s + %s => %S",
+    cref(feature,sequence),
+    gref(descriptions,unicode),
+    gref(descriptions,otherunicode),
+    value)
+end
+local basehash,basehashes,applied={},1,{}
+local function registerbasehash(tfmdata)
+  local properties=tfmdata.properties
+  local hash=concat(applied," ")
+  local base=basehash[hash]
+  if not base then
+    basehashes=basehashes+1
+    base=basehashes
+    basehash[hash]=base
+  end
+  properties.basehash=base
+  properties.fullname=(properties.fullname or properties.name).."-"..base
+  applied={}
+end
+local function registerbasefeature(feature,value)
+  applied[#applied+1]=feature.."="..tostring(value)
+end
+local function makefake(tfmdata,name,present)
+  local private=getprivate(tfmdata)
+  local character={ intermediate=true,ligatures={} }
+  resources.unicodes[name]=private
+  tfmdata.characters[private]=character
+  tfmdata.descriptions[private]={ name=name }
+  present[name]=private
+  return character
+end
+local function make_1(present,tree,name)
+  for k,v in next,tree do
+    if k=="ligature" then
+      present[name]=v
+    else
+      make_1(present,v,name.."_"..k)
+    end
+  end
+end
+local function make_2(present,tfmdata,characters,tree,name,preceding,unicode,done)
+  for k,v in next,tree do
+    if k=="ligature" then
+      local character=characters[preceding]
+      if not character then
+        if trace_baseinit then
+          report_prepare("weird ligature in lookup %a, current %C, preceding %C",sequence.name,v,preceding)
+        end
+        character=makefake(tfmdata,name,present)
+      end
+      local ligatures=character.ligatures
+      if ligatures then
+        ligatures[unicode]={ char=v }
+      else
+        character.ligatures={ [unicode]={ char=v } }
+      end
+      if done then
+        local d=done[name]
+        if not d then
+          done[name]={ "dummy",v }
+        else
+          d[#d+1]=v
+        end
+      end
+    else
+      local code=present[name] or unicode
+      local name=name.."_"..k
+      make_2(present,tfmdata,characters,v,name,code,k,done)
+    end
+  end
+end
+local function preparesubstitutions(tfmdata,feature,value,validlookups,lookuplist)
+  local characters=tfmdata.characters
+  local descriptions=tfmdata.descriptions
+  local resources=tfmdata.resources
+  local changed=tfmdata.changed
+  local ligatures={}
+  local alternate=tonumber(value) or true and 1
+  local defaultalt=otf.defaultbasealternate
+  local trace_singles=trace_baseinit and trace_singles
+  local trace_alternatives=trace_baseinit and trace_alternatives
+  local trace_ligatures=trace_baseinit and trace_ligatures
+  if not changed then
+    changed={}
+    tfmdata.changed=changed
+  end
+  for i=1,#lookuplist do
+    local sequence=lookuplist[i]
+    local steps=sequence.steps
+    local kind=sequence.type
+    if kind=="gsub_single" then
+      for i=1,#steps do
+        for unicode,data in next,steps[i].coverage do
+          if unicode~=data then
+            changed[unicode]=data
+          end
+          if trace_singles then
+            report_substitution(feature,sequence,descriptions,unicode,data)
+          end
+        end
+      end
+    elseif kind=="gsub_alternate" then
+      for i=1,#steps do
+        for unicode,data in next,steps[i].coverage do
+          local replacement=data[alternate]
+          if replacement then
+            if unicode~=replacement then
+              changed[unicode]=replacement
+            end
+            if trace_alternatives then
+              report_alternate(feature,sequence,descriptions,unicode,replacement,value,"normal")
+            end
+          elseif defaultalt=="first" then
+            replacement=data[1]
+            if unicode~=replacement then
+              changed[unicode]=replacement
+            end
+            if trace_alternatives then
+              report_alternate(feature,sequence,descriptions,unicode,replacement,value,defaultalt)
+            end
+          elseif defaultalt=="last" then
+            replacement=data[#data]
+            if unicode~=replacement then
+              changed[unicode]=replacement
+            end
+            if trace_alternatives then
+              report_alternate(feature,sequence,descriptions,unicode,replacement,value,defaultalt)
+            end
+          else
+            if trace_alternatives then
+              report_alternate(feature,sequence,descriptions,unicode,replacement,value,"unknown")
+            end
+          end
+        end
+      end
+    elseif kind=="gsub_ligature" then
+      for i=1,#steps do
+        for unicode,data in next,steps[i].coverage do
+          ligatures[#ligatures+1]={ unicode,data,"" } 
+          if trace_ligatures then
+            report_ligature(feature,sequence,descriptions,unicode,data)
+          end
+        end
+      end
+    end
+  end
+  local nofligatures=#ligatures
+  if nofligatures>0 then
+    local characters=tfmdata.characters
+    local present={}
+    local done=trace_baseinit and trace_ligatures and {}
+    for i=1,nofligatures do
+      local ligature=ligatures[i]
+      local unicode,tree=ligature[1],ligature[2]
+      make_1(present,tree,"ctx_"..unicode)
+    end
+    for i=1,nofligatures do
+      local ligature=ligatures[i]
+      local unicode,tree,lookupname=ligature[1],ligature[2],ligature[3]
+      make_2(present,tfmdata,characters,tree,"ctx_"..unicode,unicode,unicode,done,sequence)
+    end
+  end
+end
+local function preparepositionings(tfmdata,feature,value,validlookups,lookuplist)
+  local characters=tfmdata.characters
+  local descriptions=tfmdata.descriptions
+  local resources=tfmdata.resources
+  local properties=tfmdata.properties
+  local traceindeed=trace_baseinit and trace_kerns
+  for i=1,#lookuplist do
+    local sequence=lookuplist[i]
+    local steps=sequence.steps
+    local kind=sequence.type
+    local format=sequence.format
+    if kind=="gpos_pair" then
+      for i=1,#steps do
+        local step=steps[i]
+        local format=step.format
+        if format=="kern" or format=="move" then
+          for unicode,data in next,steps[i].coverage do
+            local character=characters[unicode]
+            local kerns=character.kerns
+            if not kerns then
+              kerns={}
+              character.kerns=kerns
+            end
+            if traceindeed then
+              for otherunicode,kern in next,data do
+                if not kerns[otherunicode] and kern~=0 then
+                  kerns[otherunicode]=kern
+                  report_kern(feature,sequence,descriptions,unicode,otherunicode,kern)
+                end
+              end
+            else
+              for otherunicode,kern in next,data do
+                if not kerns[otherunicode] and kern~=0 then
+                  kerns[otherunicode]=kern
+                end
+              end
+            end
+          end
+        else
+          for unicode,data in next,steps[i].coverage do
+            local character=characters[unicode]
+            local kerns=character.kerns
+            for otherunicode,kern in next,data do
+              local other=kern[2]
+              if other==true or (not other and not (kerns and kerns[otherunicode])) then
+                local kern=kern[1]
+                if kern==true then
+                elseif kern[1]~=0 or kern[2]~=0 or kern[4]~=0 then
+                else
+                  kern=kern[3]
+                  if kern~=0 then
+                    if kerns then
+                      kerns[otherunicode]=kern
+                    else
+                      kerns={ [otherunicode]=kern }
+                      character.kerns=kerns
+                    end
+                    if traceindeed then
+                      report_kern(feature,sequence,descriptions,unicode,otherunicode,kern)
+                    end
+                  end
+                end
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+end
+local function initializehashes(tfmdata)
+end
+local function checkmathreplacements(tfmdata,fullname)
+  if tfmdata.mathparameters then
+    local characters=tfmdata.characters
+    local changed=tfmdata.changed
+    if next(changed) then
+      if trace_preparing or trace_baseinit then
+        report_prepare("checking math replacements for %a",fullname)
+      end
+      for unicode,replacement in next,changed do
+        local u=characters[unicode]
+        local r=characters[replacement]
+        local n=u.next
+        local v=u.vert_variants
+        local h=u.horiz_variants
+        if n and not r.next then
+          if trace_preparing then
+            report_prepare("forcing %s for %C substituted by %U","incremental step",unicode,replacement)
+          end
+          r.next=n
+        end
+        if v and not r.vert_variants then
+          if trace_preparing then
+            report_prepare("forcing %s for %C substituted by %U","vertical variants",unicode,replacement)
+          end
+          r.vert_variants=v
+        end
+        if h and not r.horiz_variants then
+          if trace_preparing then
+            report_prepare("forcing %s for %C substituted by %U","horizontal variants",unicode,replacement)
+          end
+          r.horiz_variants=h
+        end
+      end
+    end
+  end
+end
+local function featuresinitializer(tfmdata,value)
+  if true then 
+    local starttime=trace_preparing and os.clock()
+    local features=tfmdata.shared.features
+    local fullname=tfmdata.properties.fullname or "?"
+    if features then
+      initializehashes(tfmdata)
+      local collectlookups=otf.collectlookups
+      local rawdata=tfmdata.shared.rawdata
+      local properties=tfmdata.properties
+      local script=properties.script
+      local language=properties.language
+      local rawresources=rawdata.resources
+      local rawfeatures=rawresources and rawresources.features
+      local basesubstitutions=rawfeatures and rawfeatures.gsub
+      local basepositionings=rawfeatures and rawfeatures.gpos
+      local substitutionsdone=false
+      local positioningsdone=false
+      if basesubstitutions or basepositionings then
+        local sequences=tfmdata.resources.sequences
+        for s=1,#sequences do
+          local sequence=sequences[s]
+          local sfeatures=sequence.features
+          if sfeatures then
+            local order=sequence.order
+            if order then
+              for i=1,#order do 
+                local feature=order[i]
+                local value=features[feature]
+                if value then
+                  local validlookups,lookuplist=collectlookups(rawdata,feature,script,language)
+                  if not validlookups then
+                  elseif basesubstitutions and basesubstitutions[feature] then
+                    if trace_preparing then
+                      report_prepare("filtering base %s feature %a for %a with value %a","sub",feature,fullname,value)
+                    end
+                    preparesubstitutions(tfmdata,feature,value,validlookups,lookuplist)
+                    registerbasefeature(feature,value)
+                    substitutionsdone=true
+                  elseif basepositionings and basepositionings[feature] then
+                    if trace_preparing then
+                      report_prepare("filtering base %a feature %a for %a with value %a","pos",feature,fullname,value)
+                    end
+                    preparepositionings(tfmdata,feature,value,validlookups,lookuplist)
+                    registerbasefeature(feature,value)
+                    positioningsdone=true
+                  end
+                end
+              end
+            end
+          end
+        end
+      end
+      if substitutionsdone then
+        checkmathreplacements(tfmdata,fullname)
+      end
+      registerbasehash(tfmdata)
+    end
+    if trace_preparing then
+      report_prepare("preparation time is %0.3f seconds for %a",os.clock()-starttime,fullname)
+    end
+  end
+end
+registerotffeature {
+  name="features",
+  description="features",
+  default=true,
+  initializers={
+    base=featuresinitializer,
+  }
+}
+otf.basemodeinitializer=featuresinitializer
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-otj']={
+  version=1.001,
+  comment="companion to font-lib.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files",
+}
+if not nodes.properties then return end
+local next,rawget,tonumber=next,rawget,tonumber
+local fastcopy=table.fastcopy
+local registertracker=trackers.register
+local trace_injections=false registertracker("fonts.injections",function(v) trace_injections=v end)
+local trace_marks=false registertracker("fonts.injections.marks",function(v) trace_marks=v end)
+local trace_cursive=false registertracker("fonts.injections.cursive",function(v) trace_cursive=v end)
+local trace_spaces=false registertracker("fonts.injections.spaces",function(v) trace_spaces=v end)
+local report_injections=logs.reporter("fonts","injections")
+local report_spaces=logs.reporter("fonts","spaces")
+local attributes,nodes,node=attributes,nodes,node
+fonts=fonts
+local hashes=fonts.hashes
+local fontdata=hashes.identifiers
+nodes.injections=nodes.injections or {}
+local injections=nodes.injections
+local tracers=nodes.tracers
+local setcolor=tracers and tracers.colors.set
+local resetcolor=tracers and tracers.colors.reset
+local nodecodes=nodes.nodecodes
+local glyph_code=nodecodes.glyph
+local disc_code=nodecodes.disc
+local kern_code=nodecodes.kern
+local glue_code=nodecodes.glue
+local nuts=nodes.nuts
+local nodepool=nuts.pool
+local tonode=nuts.tonode
+local tonut=nuts.tonut
+local setfield=nuts.setfield
+local getnext=nuts.getnext
+local getprev=nuts.getprev
+local getid=nuts.getid
+local getfont=nuts.getfont
+local getchar=nuts.getchar
+local getoffsets=nuts.getoffsets
+local getboth=nuts.getboth
+local getdisc=nuts.getdisc
+local setdisc=nuts.setdisc
+local setoffsets=nuts.setoffsets
+local ischar=nuts.is_char
+local getkern=nuts.getkern
+local setkern=nuts.setkern
+local setlink=nuts.setlink
+local setwidth=nuts.setwidth
+local getwidth=nuts.getwidth
+local traverse_id=nuts.traverse_id
+local traverse_char=nuts.traverse_char
+local insert_node_before=nuts.insert_before
+local insert_node_after=nuts.insert_after
+local properties=nodes.properties.data
+local fontkern=nuts.pool and nuts.pool.fontkern  
+local italickern=nuts.pool and nuts.pool.italickern 
+local useitalickerns=false
+directives.register("fonts.injections.useitalics",function(v)
+  if v then
+    report_injections("using italics for space kerns (tracing only)")
+  end
+  useitalickerns=v
+end)
+do if not fontkern then 
+  local thekern=nuts.new("kern",0) 
+  local setkern=nuts.setkern
+  local copy_node=nuts.copy_node
+  fontkern=function(k)
+    local n=copy_node(thekern)
+    setkern(n,k)
+    return n
+  end
+  local thekern=nuts.new("kern",3) 
+  local setkern=nuts.setkern
+  local copy_node=nuts.copy_node
+  italickern=function(k)
+    local n=copy_node(thekern)
+    setkern(n,k)
+    return n
+  end
+end end
+function injections.installnewkern() end 
+local nofregisteredkerns=0
+local nofregisteredpositions=0
+local nofregisteredmarks=0
+local nofregisteredcursives=0
+local keepregisteredcounts=false
+function injections.keepcounts()
+  keepregisteredcounts=true
+end
+function injections.resetcounts()
+  nofregisteredkerns=0
+  nofregisteredpositions=0
+  nofregisteredmarks=0
+  nofregisteredcursives=0
+  keepregisteredcounts=false
+end
+function injections.reset(n)
+  local p=rawget(properties,n)
+  if p then
+    p.injections=false 
+  else
+    properties[n]=false 
+  end
+end
+function injections.copy(target,source)
+  local sp=rawget(properties,source)
+  if sp then
+    local tp=rawget(properties,target)
+    local si=sp.injections
+    if si then
+      si=fastcopy(si)
+      if tp then
+        tp.injections=si
+      else
+        properties[target]={
+          injections=si,
+        }
+      end
+    elseif tp then
+      tp.injections=false 
+    else
+      properties[target]={ injections={} }
+    end
+  else
+    local tp=rawget(properties,target)
+    if tp then
+      tp.injections=false 
+    else
+      properties[target]=false 
+    end
+  end
+end
+function injections.setligaindex(n,index)
+  local p=rawget(properties,n)
+  if p then
+    local i=p.injections
+    if i then
+      i.ligaindex=index
+    else
+      p.injections={
+        ligaindex=index
+      }
+    end
+  else
+    properties[n]={
+      injections={
+        ligaindex=index
+      }
+    }
+  end
+end
+function injections.getligaindex(n,default)
+  local p=rawget(properties,n)
+  if p then
+    local i=p.injections
+    if i then
+      return i.ligaindex or default
+    end
+  end
+  return default
+end
+function injections.setcursive(start,nxt,factor,rlmode,exit,entry,tfmstart,tfmnext,r2lflag)
+  local dx=factor*(exit[1]-entry[1])
+  local dy=-factor*(exit[2]-entry[2])
+  local ws=tfmstart.width
+  local wn=tfmnext.width
+  nofregisteredcursives=nofregisteredcursives+1
+  if rlmode<0 then
+    dx=-(dx+wn)
+  else
+    dx=dx-ws
+  end
+  if dx==0 then
+    dx=0
+  end
+  local p=rawget(properties,start)
+  if p then
+    local i=p.injections
+    if i then
+      i.cursiveanchor=true
+    else
+      p.injections={
+        cursiveanchor=true,
+      }
+    end
+  else
+    properties[start]={
+      injections={
+        cursiveanchor=true,
+      },
+    }
+  end
+  local p=rawget(properties,nxt)
+  if p then
+    local i=p.injections
+    if i then
+      i.cursivex=dx
+      i.cursivey=dy
+    else
+      p.injections={
+        cursivex=dx,
+        cursivey=dy,
+      }
+    end
+  else
+    properties[nxt]={
+      injections={
+        cursivex=dx,
+        cursivey=dy,
+      },
+    }
+  end
+  return dx,dy,nofregisteredcursives
+end
+function injections.setposition(kind,current,factor,rlmode,spec,injection)
+  local x=factor*spec[1]
+  local y=factor*spec[2]
+  local w=factor*spec[3]
+  local h=factor*spec[4]
+  if x~=0 or w~=0 or y~=0 or h~=0 then 
+    local yoffset=y-h
+    local leftkern=x   
+    local rightkern=w-x 
+    if leftkern~=0 or rightkern~=0 or yoffset~=0 then
+      nofregisteredpositions=nofregisteredpositions+1
+      if rlmode and rlmode<0 then
+        leftkern,rightkern=rightkern,leftkern
+      end
+      if not injection then
+        injection="injections"
+      end
+      local p=rawget(properties,current)
+      if p then
+        local i=p[injection]
+        if i then
+          if leftkern~=0 then
+            i.leftkern=(i.leftkern or 0)+leftkern
+          end
+          if rightkern~=0 then
+            i.rightkern=(i.rightkern or 0)+rightkern
+          end
+          if yoffset~=0 then
+            i.yoffset=(i.yoffset or 0)+yoffset
+          end
+        elseif leftkern~=0 or rightkern~=0 then
+          p[injection]={
+            leftkern=leftkern,
+            rightkern=rightkern,
+            yoffset=yoffset,
+          }
+        else
+          p[injection]={
+            yoffset=yoffset,
+          }
+        end
+      elseif leftkern~=0 or rightkern~=0 then
+        properties[current]={
+          [injection]={
+            leftkern=leftkern,
+            rightkern=rightkern,
+            yoffset=yoffset,
+          },
+        }
+      else
+        properties[current]={
+          [injection]={
+            yoffset=yoffset,
+          },
+        }
+      end
+      return x,y,w,h,nofregisteredpositions
+     end
+  end
+  return x,y,w,h 
+end
+function injections.setkern(current,factor,rlmode,x,injection)
+  local dx=factor*x
+  if dx~=0 then
+    nofregisteredkerns=nofregisteredkerns+1
+    local p=rawget(properties,current)
+    if not injection then
+      injection="injections"
+    end
+    if p then
+      local i=p[injection]
+      if i then
+        i.leftkern=dx+(i.leftkern or 0)
+      else
+        p[injection]={
+          leftkern=dx,
+        }
+      end
+    else
+      properties[current]={
+        [injection]={
+          leftkern=dx,
+        },
+      }
+    end
+    return dx,nofregisteredkerns
+  else
+    return 0,0
+  end
+end
+function injections.setmove(current,factor,rlmode,x,injection)
+  local dx=factor*x
+  if dx~=0 then
+    nofregisteredkerns=nofregisteredkerns+1
+    local p=rawget(properties,current)
+    if not injection then
+      injection="injections"
+    end
+if rlmode and rlmode<0 then
+    if p then
+      local i=p[injection]
+      if i then
+        i.rightkern=dx+(i.rightkern or 0)
+      else
+        p[injection]={
+          rightkern=dx,
+        }
+      end
+    else
+      properties[current]={
+        [injection]={
+          rightkern=dx,
+        },
+      }
+    end
+else
+    if p then
+      local i=p[injection]
+      if i then
+        i.leftkern=dx+(i.leftkern or 0)
+      else
+        p[injection]={
+          leftkern=dx,
+        }
+      end
+    else
+      properties[current]={
+        [injection]={
+          leftkern=dx,
+        },
+      }
+    end
+end
+    return dx,nofregisteredkerns
+  else
+    return 0,0
+  end
+end
+function injections.setmark(start,base,factor,rlmode,ba,ma,tfmbase,mkmk,checkmark) 
+  local dx,dy=factor*(ba[1]-ma[1]),factor*(ba[2]-ma[2])
+  nofregisteredmarks=nofregisteredmarks+1
+  if rlmode>=0 then
+    dx=tfmbase.width-dx 
+  end
+  local p=rawget(properties,start)
+  if p then
+    local i=p.injections
+    if i then
+      if i.markmark then
+      else
+        i.markx=dx
+        i.marky=dy
+        i.markdir=rlmode or 0
+        i.markbase=nofregisteredmarks
+        i.markbasenode=base
+        i.markmark=mkmk
+        i.checkmark=checkmark
+      end
+    else
+      p.injections={
+        markx=dx,
+        marky=dy,
+        markdir=rlmode or 0,
+        markbase=nofregisteredmarks,
+        markbasenode=base,
+        markmark=mkmk,
+        checkmark=checkmark,
+      }
+    end
+  else
+    properties[start]={
+      injections={
+        markx=dx,
+        marky=dy,
+        markdir=rlmode or 0,
+        markbase=nofregisteredmarks,
+        markbasenode=base,
+        markmark=mkmk,
+        checkmark=checkmark,
+      },
+    }
+  end
+  return dx,dy,nofregisteredmarks
+end
+local function dir(n)
+  return (n and n<0 and "r-to-l") or (n and n>0 and "l-to-r") or "unset"
+end
+local function showchar(n,nested)
+  local char=getchar(n)
+  report_injections("%wfont %s, char %U, glyph %c",nested and 2 or 0,getfont(n),char,char)
+end
+local function show(n,what,nested,symbol)
+  if n then
+    local p=rawget(properties,n)
+    if p then
+      local i=p[what]
+      if i then
+        local leftkern=i.leftkern or 0
+        local rightkern=i.rightkern or 0
+        local yoffset=i.yoffset  or 0
+        local markx=i.markx   or 0
+        local marky=i.marky   or 0
+        local markdir=i.markdir  or 0
+        local markbase=i.markbase or 0
+        local cursivex=i.cursivex or 0
+        local cursivey=i.cursivey or 0
+        local ligaindex=i.ligaindex or 0
+        local cursbase=i.cursiveanchor
+        local margin=nested and 4 or 2
+        if rightkern~=0 or yoffset~=0 then
+          report_injections("%w%s pair: lx %p, rx %p, dy %p",margin,symbol,leftkern,rightkern,yoffset)
+        elseif leftkern~=0 then
+          report_injections("%w%s kern: dx %p",margin,symbol,leftkern)
+        end
+        if markx~=0 or marky~=0 or markbase~=0 then
+          report_injections("%w%s mark: dx %p, dy %p, dir %s, base %s",margin,symbol,markx,marky,markdir,markbase~=0 and "yes" or "no")
+        end
+        if cursivex~=0 or cursivey~=0 then
+          if cursbase then
+            report_injections("%w%s curs: base dx %p, dy %p",margin,symbol,cursivex,cursivey)
+          else
+            report_injections("%w%s curs: dx %p, dy %p",margin,symbol,cursivex,cursivey)
+          end
+        elseif cursbase then
+          report_injections("%w%s curs: base",margin,symbol)
+        end
+        if ligaindex~=0 then
+          report_injections("%w%s liga: index %i",margin,symbol,ligaindex)
+        end
+      end
+    end
+  end
+end
+local function showsub(n,what,where)
+  report_injections("begin subrun: %s",where)
+  for n in traverse_char(n) do
+    showchar(n,where)
+    show(n,what,where," ")
+  end
+  report_injections("end subrun")
+end
+local function trace(head,where)
+  report_injections()
+  report_injections("begin run %s: %s kerns, %s positions, %s marks and %s cursives registered",
+    where or "",nofregisteredkerns,nofregisteredpositions,nofregisteredmarks,nofregisteredcursives)
+  local n=head
+  while n do
+    local id=getid(n)
+    if id==glyph_code then
+      showchar(n)
+      show(n,"injections",false," ")
+      show(n,"preinjections",false,"<")
+      show(n,"postinjections",false,">")
+      show(n,"replaceinjections",false,"=")
+      show(n,"emptyinjections",false,"*")
+    elseif id==disc_code then
+      local pre,post,replace=getdisc(n)
+      if pre then
+        showsub(pre,"preinjections","pre")
+      end
+      if post then
+        showsub(post,"postinjections","post")
+      end
+      if replace then
+        showsub(replace,"replaceinjections","replace")
+      end
+      show(n,"emptyinjections",false,"*")
+    end
+    n=getnext(n)
+  end
+  report_injections("end run")
+end
+local function show_result(head)
+  local current=head
+  local skipping=false
+  while current do
+    local id=getid(current)
+    if id==glyph_code then
+      local w=getwidth(current)
+      local x,y=getoffsets(current)
+      report_injections("char: %C, width %p, xoffset %p, yoffset %p",getchar(current),w,x,y)
+      skipping=false
+    elseif id==kern_code then
+      report_injections("kern: %p",getkern(current))
+      skipping=false
+    elseif not skipping then
+      report_injections()
+      skipping=true
+    end
+    current=getnext(current)
+  end
+  report_injections()
+end
+local function inject_kerns_only(head,where)
+  head=tonut(head)
+  if trace_injections then
+    trace(head,"kerns")
+  end
+  local current=head
+  local prev=nil
+  local next=nil
+  local prevdisc=nil
+  local pre=nil 
+  local post=nil 
+  local replace=nil 
+  local pretail=nil 
+  local posttail=nil 
+  local replacetail=nil 
+  while current do
+    local next=getnext(current)
+    local char,id=ischar(current)
+    if char then
+      local p=rawget(properties,current)
+      if p then
+        local i=p.injections
+        if i then
+          local leftkern=i.leftkern
+          if leftkern and leftkern~=0 then
+            head=insert_node_before(head,current,fontkern(leftkern))
+          end
+        end
+        if prevdisc then
+          local done=false
+          if post then
+            local i=p.postinjections
+            if i then
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                setlink(posttail,fontkern(leftkern))
+                done=true
+              end
+            end
+          end
+          if replace then
+            local i=p.replaceinjections
+            if i then
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                setlink(replacetail,fontkern(leftkern))
+                done=true
+              end
+            end
+          else
+            local i=p.emptyinjections
+            if i then
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                setfield(prev,"replace",fontkern(leftkern)) 
+              end
+            end
+          end
+          if done then
+            setdisc(prevdisc,pre,post,replace)
+          end
+        end
+      end
+      prevdisc=nil
+    elseif char==false then
+      prevdisc=nil
+    elseif id==disc_code then
+      pre,post,replace,pretail,posttail,replacetail=getdisc(current,true)
+      local done=false
+      if pre then
+        for n in traverse_char(pre) do
+          local p=rawget(properties,n)
+          if p then
+            local i=p.injections or p.preinjections
+            if i then
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                pre=insert_node_before(pre,n,fontkern(leftkern))
+                done=true
+              end
+            end
+          end
+        end
+      end
+      if post then
+        for n in traverse_char(post) do
+          local p=rawget(properties,n)
+          if p then
+            local i=p.injections or p.postinjections
+            if i then
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                post=insert_node_before(post,n,fontkern(leftkern))
+                done=true
+              end
+            end
+          end
+        end
+      end
+      if replace then
+        for n in traverse_char(replace) do
+          local p=rawget(properties,n)
+          if p then
+            local i=p.injections or p.replaceinjections
+            if i then
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                replace=insert_node_before(replace,n,fontkern(leftkern))
+                done=true
+              end
+            end
+          end
+        end
+      end
+      if done then
+        setdisc(current,pre,post,replace)
+      end
+      prevdisc=current
+    else
+      prevdisc=nil
+    end
+    prev=current
+    current=next
+  end
+  if keepregisteredcounts then
+    keepregisteredcounts=false
+  else
+    nofregisteredkerns=0
+  end
+  if trace_injections then
+    show_result(head)
+  end
+  return tonode(head),true
+end
+local function inject_positions_only(head,where)
+  head=tonut(head)
+  if trace_injections then
+    trace(head,"positions")
+  end
+  local current=head
+  local prev=nil
+  local next=nil
+  local prevdisc=nil
+  local prevglyph=nil
+  local pre=nil 
+  local post=nil 
+  local replace=nil 
+  local pretail=nil 
+  local posttail=nil 
+  local replacetail=nil 
+  while current do
+    local next=getnext(current)
+    local char,id=ischar(current)
+    if char then
+      local p=rawget(properties,current)
+      if p then
+        local i=p.injections
+        if i then
+          local yoffset=i.yoffset
+          if yoffset and yoffset~=0 then
+            setoffsets(current,false,yoffset)
+          end
+          local leftkern=i.leftkern
+          local rightkern=i.rightkern
+          if leftkern and leftkern~=0 then
+if rightkern and leftkern==-rightkern then
+  setoffsets(current,leftkern,false)
+  rightkern=0
+else
+            head=insert_node_before(head,current,fontkern(leftkern))
+end
+          end
+          if rightkern and rightkern~=0 then
+            insert_node_after(head,current,fontkern(rightkern))
+          end
+        else
+          local i=p.emptyinjections
+          if i then
+            local rightkern=i.rightkern
+            if rightkern and rightkern~=0 then
+              if next and getid(next)==disc_code then
+                if replace then
+                else
+                  setfield(next,"replace",fontkern(rightkern)) 
+                end
+              end
+            end
+          end
+        end
+        if prevdisc then
+          local done=false
+          if post then
+            local i=p.postinjections
+            if i then
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                setlink(posttail,fontkern(leftkern))
+                done=true
+              end
+            end
+          end
+          if replace then
+            local i=p.replaceinjections
+            if i then
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                setlink(replacetail,fontkern(leftkern))
+                done=true
+              end
+            end
+          else
+            local i=p.emptyinjections
+            if i then
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                setfield(prev,"replace",fontkern(leftkern)) 
+              end
+            end
+          end
+          if done then
+            setdisc(prevdisc,pre,post,replace)
+          end
+        end
+      end
+      prevdisc=nil
+      prevglyph=current
+    elseif char==false then
+      prevdisc=nil
+      prevglyph=current
+    elseif id==disc_code then
+      pre,post,replace,pretail,posttail,replacetail=getdisc(current,true)
+      local done=false
+      if pre then
+        for n in traverse_char(pre) do
+          local p=rawget(properties,n)
+          if p then
+            local i=p.injections or p.preinjections
+            if i then
+              local yoffset=i.yoffset
+              if yoffset and yoffset~=0 then
+                setoffsets(n,false,yoffset)
+              end
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                pre=insert_node_before(pre,n,fontkern(leftkern))
+                done=true
+              end
+              local rightkern=i.rightkern
+              if rightkern and rightkern~=0 then
+                insert_node_after(pre,n,fontkern(rightkern))
+                done=true
+              end
+            end
+          end
+        end
+      end
+      if post then
+        for n in traverse_char(post) do
+          local p=rawget(properties,n)
+          if p then
+            local i=p.injections or p.postinjections
+            if i then
+              local yoffset=i.yoffset
+              if yoffset and yoffset~=0 then
+                setoffsets(n,false,yoffset)
+              end
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                post=insert_node_before(post,n,fontkern(leftkern))
+                done=true
+              end
+              local rightkern=i.rightkern
+              if rightkern and rightkern~=0 then
+                insert_node_after(post,n,fontkern(rightkern))
+                done=true
+              end
+            end
+          end
+        end
+      end
+      if replace then
+        for n in traverse_char(replace) do
+          local p=rawget(properties,n)
+          if p then
+            local i=p.injections or p.replaceinjections
+            if i then
+              local yoffset=i.yoffset
+              if yoffset and yoffset~=0 then
+                setoffsets(n,false,yoffset)
+              end
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                replace=insert_node_before(replace,n,fontkern(leftkern))
+                done=true
+              end
+              local rightkern=i.rightkern
+              if rightkern and rightkern~=0 then
+                insert_node_after(replace,n,fontkern(rightkern))
+                done=true
+              end
+            end
+          end
+        end
+      end
+      if prevglyph then
+        if pre then
+          local p=rawget(properties,prevglyph)
+          if p then
+            local i=p.preinjections
+            if i then
+              local rightkern=i.rightkern
+              if rightkern and rightkern~=0 then
+                pre=insert_node_before(pre,pre,fontkern(rightkern))
+                done=true
+              end
+            end
+          end
+        end
+        if replace then
+          local p=rawget(properties,prevglyph)
+          if p then
+            local i=p.replaceinjections
+            if i then
+              local rightkern=i.rightkern
+              if rightkern and rightkern~=0 then
+                replace=insert_node_before(replace,replace,fontkern(rightkern))
+                done=true
+              end
+            end
+          end
+        end
+      end
+      if done then
+        setdisc(current,pre,post,replace)
+      end
+      prevglyph=nil
+      prevdisc=current
+    else
+      prevglyph=nil
+      prevdisc=nil
+    end
+    prev=current
+    current=next
+  end
+  if keepregisteredcounts then
+    keepregisteredcounts=false
+  else
+    nofregisteredpositions=0
+  end
+  if trace_injections then
+    show_result(head)
+  end
+  return tonode(head),true
+end
+local function showoffset(n,flag)
+  local x,y=getoffsets(n)
+  if x~=0 or y~=0 then
+    setcolor(n,"darkgray")
+  end
+end
+local function inject_everything(head,where)
+  head=tonut(head)
+  if trace_injections then
+    trace(head,"everything")
+  end
+  local hascursives=nofregisteredcursives>0
+  local hasmarks=nofregisteredmarks>0
+  local current=head
+  local last=nil
+  local prev=nil
+  local next=nil
+  local prevdisc=nil
+  local prevglyph=nil
+  local pre=nil 
+  local post=nil 
+  local replace=nil 
+  local pretail=nil 
+  local posttail=nil 
+  local replacetail=nil
+  local cursiveanchor=nil
+  local minc=0
+  local maxc=0
+  local glyphs={}
+  local marks={}
+  local nofmarks=0
+  local function processmark(p,n,pn) 
+    local px,py=getoffsets(p)
+    local nx,ny=getoffsets(n)
+    local ox=0
+    local rightkern=nil
+    local pp=rawget(properties,p)
+    if pp then
+      pp=pp.injections
+      if pp then
+        rightkern=pp.rightkern
+      end
+    end
+    if rightkern then 
+      if pn.markdir<0 then
+        ox=px-pn.markx-rightkern
+        if not pn.markmark then
+          ox=ox+(pn.leftkern or 0)
+        end
+      else
+        ox=px-pn.markx-rightkern 
+        if false then
+          local leftkern=pp.leftkern
+          if leftkern then
+            ox=ox-leftkern
+          end
+        end
+      end
+    else
+      if pn.markdir<0 then
+        ox=px-pn.markx
+        if not pn.markmark then
+          local leftkern=pn.leftkern
+          if leftkern then
+            ox=ox+leftkern 
+          end
+        end
+      else
+        ox=px-pn.markx
+      end
+      if pn.checkmark then
+        local wn=getwidth(n) 
+        if wn and wn~=0 then
+          wn=wn/2
+          if trace_injections then
+            report_injections("correcting non zero width mark %C",getchar(n))
+          end
+          insert_node_before(n,n,fontkern(-wn))
+          insert_node_after(n,n,fontkern(-wn))
+        end
+      end
+    end
+    local oy=ny+py+pn.marky
+    if not pn.markmark then
+      local yoffset=pn.yoffset
+      if yoffset then
+        oy=oy+yoffset 
+      end
+    end
+    setoffsets(n,ox,oy)
+    if trace_marks then
+      showoffset(n,true)
+    end
+  end
+  while current do
+    local next=getnext(current)
+    local char,id=ischar(current)
+    if char then
+      local p=rawget(properties,current)
+      if p then
+        local i=p.injections
+        if i then
+          local pm=i.markbasenode
+          if pm then
+            nofmarks=nofmarks+1
+            marks[nofmarks]=current
+          else
+            local yoffset=i.yoffset
+            if yoffset and yoffset~=0 then
+              setoffsets(current,false,yoffset)
+            end
+            if hascursives then
+              local cursivex=i.cursivex
+              if cursivex then
+                if cursiveanchor then
+                  if cursivex~=0 then
+                    i.leftkern=(i.leftkern or 0)+cursivex
+                  end
+                  if maxc==0 then
+                    minc=1
+                    maxc=1
+                    glyphs[1]=cursiveanchor
+                  else
+                    maxc=maxc+1
+                    glyphs[maxc]=cursiveanchor
+                  end
+                  properties[cursiveanchor].cursivedy=i.cursivey 
+                  last=current
+                else
+                  maxc=0
+                end
+              elseif maxc>0 then
+                local nx,ny=getoffsets(current)
+                for i=maxc,minc,-1 do
+                  local ti=glyphs[i]
+                  ny=ny+properties[ti].cursivedy
+                  setoffsets(ti,false,ny) 
+                  if trace_cursive then
+                    showoffset(ti)
+                  end
+                end
+                maxc=0
+                cursiveanchor=nil
+              end
+              if i.cursiveanchor then
+                cursiveanchor=current 
+              else
+                if maxc>0 then
+                  local nx,ny=getoffsets(current)
+                  for i=maxc,minc,-1 do
+                    local ti=glyphs[i]
+                    ny=ny+properties[ti].cursivedy
+                    setoffsets(ti,false,ny) 
+                    if trace_cursive then
+                      showoffset(ti)
+                    end
+                  end
+                  maxc=0
+                end
+                cursiveanchor=nil
+              end
+            end
+            local leftkern=i.leftkern
+            local rightkern=i.rightkern
+            if leftkern and leftkern~=0 then
+if rightkern and leftkern==-rightkern then
+  setoffsets(current,leftkern,false)
+  rightkern=0
+else
+              head=insert_node_before(head,current,fontkern(leftkern))
+end
+            end
+            if rightkern and rightkern~=0 then
+              insert_node_after(head,current,fontkern(rightkern))
+            end
+          end
+        else
+          local i=p.emptyinjections
+          if i then
+            local rightkern=i.rightkern
+            if rightkern and rightkern~=0 then
+              if next and getid(next)==disc_code then
+                if replace then
+                else
+                  setfield(next,"replace",fontkern(rightkern)) 
+                end
+              end
+            end
+          end
+        end
+        if prevdisc then
+          if p then
+            local done=false
+            if post then
+              local i=p.postinjections
+              if i then
+                local leftkern=i.leftkern
+                if leftkern and leftkern~=0 then
+                  setlink(posttail,fontkern(leftkern))
+                  done=true
+                end
+              end
+            end
+            if replace then
+              local i=p.replaceinjections
+              if i then
+                local leftkern=i.leftkern
+                if leftkern and leftkern~=0 then
+                  setlink(replacetail,fontkern(leftkern))
+                  done=true
+                end
+              end
+            else
+              local i=p.emptyinjections
+              if i then
+                local leftkern=i.leftkern
+                if leftkern and leftkern~=0 then
+                  setfield(prev,"replace",fontkern(leftkern)) 
+                end
+              end
+            end
+            if done then
+              setdisc(prevdisc,pre,post,replace)
+            end
+          end
+        end
+      else
+        if hascursives and maxc>0 then
+          local nx,ny=getoffsets(current)
+          for i=maxc,minc,-1 do
+            local ti=glyphs[i]
+            ny=ny+properties[ti].cursivedy
+            local xi,yi=getoffsets(ti)
+            setoffsets(ti,xi,yi+ny) 
+          end
+          maxc=0
+          cursiveanchor=nil
+        end
+      end
+      prevdisc=nil
+      prevglyph=current
+    elseif char==false then
+      prevdisc=nil
+      prevglyph=current
+    elseif id==disc_code then
+      pre,post,replace,pretail,posttail,replacetail=getdisc(current,true)
+      local done=false
+      if pre then
+        for n in traverse_char(pre) do
+          local p=rawget(properties,n)
+          if p then
+            local i=p.injections or p.preinjections
+            if i then
+              local yoffset=i.yoffset
+              if yoffset and yoffset~=0 then
+                setoffsets(n,false,yoffset)
+              end
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                pre=insert_node_before(pre,n,fontkern(leftkern))
+                done=true
+              end
+              local rightkern=i.rightkern
+              if rightkern and rightkern~=0 then
+                insert_node_after(pre,n,fontkern(rightkern))
+                done=true
+              end
+              if hasmarks then
+                local pm=i.markbasenode
+                if pm then
+                  processmark(pm,n,i)
+                end
+              end
+            end
+          end
+        end
+      end
+      if post then
+        for n in traverse_char(post) do
+          local p=rawget(properties,n)
+          if p then
+            local i=p.injections or p.postinjections
+            if i then
+              local yoffset=i.yoffset
+              if yoffset and yoffset~=0 then
+                setoffsets(n,false,yoffset)
+              end
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                post=insert_node_before(post,n,fontkern(leftkern))
+                done=true
+              end
+              local rightkern=i.rightkern
+              if rightkern and rightkern~=0 then
+                insert_node_after(post,n,fontkern(rightkern))
+                done=true
+              end
+              if hasmarks then
+                local pm=i.markbasenode
+                if pm then
+                  processmark(pm,n,i)
+                end
+              end
+            end
+          end
+        end
+      end
+      if replace then
+        for n in traverse_char(replace) do
+          local p=rawget(properties,n)
+          if p then
+            local i=p.injections or p.replaceinjections
+            if i then
+              local yoffset=i.yoffset
+              if yoffset and yoffset~=0 then
+                setoffsets(n,false,yoffset)
+              end
+              local leftkern=i.leftkern
+              if leftkern and leftkern~=0 then
+                replace=insert_node_before(replace,n,fontkern(leftkern))
+                done=true
+              end
+              local rightkern=i.rightkern
+              if rightkern and rightkern~=0 then
+                insert_node_after(replace,n,fontkern(rightkern))
+                done=true
+              end
+              if hasmarks then
+                local pm=i.markbasenode
+                if pm then
+                  processmark(pm,n,i)
+                end
+              end
+            end
+          end
+        end
+      end
+      if prevglyph then
+        if pre then
+          local p=rawget(properties,prevglyph)
+          if p then
+            local i=p.preinjections
+            if i then
+              local rightkern=i.rightkern
+              if rightkern and rightkern~=0 then
+                pre=insert_node_before(pre,pre,fontkern(rightkern))
+                done=true
+              end
+            end
+          end
+        end
+        if replace then
+          local p=rawget(properties,prevglyph)
+          if p then
+            local i=p.replaceinjections
+            if i then
+              local rightkern=i.rightkern
+              if rightkern and rightkern~=0 then
+                replace=insert_node_before(replace,replace,fontkern(rightkern))
+                done=true
+              end
+            end
+          end
+        end
+      end
+      if done then
+        setdisc(current,pre,post,replace)
+      end
+      prevglyph=nil
+      prevdisc=current
+    else
+      prevglyph=nil
+      prevdisc=nil
+    end
+    prev=current
+    current=next
+  end
+  if hascursives and maxc>0 then
+    local nx,ny=getoffsets(last)
+    for i=maxc,minc,-1 do
+      local ti=glyphs[i]
+      ny=ny+properties[ti].cursivedy
+      setoffsets(ti,false,ny) 
+      if trace_cursive then
+        showoffset(ti)
+      end
+    end
+  end
+  if nofmarks>0 then
+    for i=1,nofmarks do
+      local m=marks[i]
+      local p=rawget(properties,m)
+      local i=p.injections
+      local b=i.markbasenode
+      processmark(b,m,i)
+    end
+  elseif hasmarks then
+  end
+  if keepregisteredcounts then
+    keepregisteredcounts=false
+  else
+    nofregisteredkerns=0
+    nofregisteredpositions=0
+    nofregisteredmarks=0
+    nofregisteredcursives=0
+  end
+  if trace_injections then
+    show_result(head)
+  end
+  return tonode(head),true
+end
+local triggers=false
+function nodes.injections.setspacekerns(font,sequence)
+  if triggers then
+    triggers[font]=sequence
+  else
+    triggers={ [font]=sequence }
+  end
+end
+local getthreshold
+if context then
+  local threshold=1 
+  local parameters=fonts.hashes.parameters
+  directives.register("otf.threshold",function(v) threshold=tonumber(v) or 1 end)
+  getthreshold=function(font)
+    local p=parameters[font]
+    local f=p.factor
+    local s=p.spacing
+    local t=threshold*(s and s.width or p.space or 0)-2
+    return t>0 and t or 0,f
+  end
+else
+  injections.threshold=0
+  getthreshold=function(font)
+    local p=fontdata[font].parameters
+    local f=p.factor
+    local s=p.spacing
+    local t=injections.threshold*(s and s.width or p.space or 0)-2
+    return t>0 and t or 0,f
+  end
+end
+injections.getthreshold=getthreshold
+function injections.isspace(n,threshold,id)
+  if (id or getid(n))==glue_code then
+    local w=getwidth(n)
+    if threshold and w>threshold then 
+      return 32
+    end
+  end
+end
+local getspaceboth=getboth
+function injections.installgetspaceboth(gb)
+  getspaceboth=gb or getboth
+end
+local function injectspaces(head)
+  if not triggers then
+    return head,false
+  end
+  local lastfont=nil
+  local spacekerns=nil
+  local leftkerns=nil
+  local rightkerns=nil
+  local factor=0
+  local threshold=0
+  local leftkern=false
+  local rightkern=false
+  local nuthead=tonut(head)
+  local function updatefont(font,trig)
+    leftkerns=trig.left
+    rightkerns=trig.right
+    lastfont=font
+    threshold,
+    factor=getthreshold(font)
+  end
+  for n in traverse_id(glue_code,nuthead) do
+    local prev,next=getspaceboth(n)
+    local prevchar=prev and ischar(prev)
+    local nextchar=next and ischar(next)
+    if nextchar then
+      local font=getfont(next)
+      local trig=triggers[font]
+      if trig then
+        if lastfont~=font then
+          updatefont(font,trig)
+        end
+        if rightkerns then
+          rightkern=rightkerns[nextchar]
+        end
+      end
+    end
+    if prevchar then
+      local font=getfont(prev)
+      local trig=triggers[font]
+      if trig then
+        if lastfont~=font then
+          updatefont(font,trig)
+        end
+        if leftkerns then
+          leftkern=leftkerns[prevchar]
+        end
+      end
+    end
+    if leftkern then
+      local old=getwidth(n)
+      if old>threshold then
+        if rightkern then
+          if useitalickerns then
+            local new=old+(leftkern+rightkern)*factor
+            if trace_spaces then
+              report_spaces("%C [%p -> %p] %C",prevchar,old,new,nextchar)
+            end
+            setwidth(n,new)
+          else
+            local new=(leftkern+rightkern)*factor
+            if trace_spaces then
+              report_spaces("%C [%p + %p] %C",prevchar,old,new,nextchar)
+            end
+            local h=insert_node_before(nuthead,n,italickern(new))
+            if h==nuthead then
+              head=tonode(h)
+              nuthead=h
+            end
+          end
+          leftkern=false
+        else
+          if useitalickerns then
+            local new=leftkern*factor
+            if trace_spaces then
+              report_spaces("%C [%p + %p]",prevchar,old,new)
+            end
+            insert_node_after(nuthead,n,italickern(new)) 
+          else
+            local new=old+leftkern*factor
+            if trace_spaces then
+              report_spaces("%C [%p -> %p]",prevchar,old,new)
+            end
+            setwidth(n,new)
+          end
+        end
+      end
+      leftkern=false
+    elseif rightkern then
+      local old=getwidth(n)
+      if old>threshold then
+        local new=old+rightkern*factor
+        if trace_spaces then
+          report_spaces("[%p -> %p] %C",nextchar,old,new)
+        end
+        setwidth(n,new)
+      end
+      rightkern=false
+    end
+  end
+  triggers=false
+  return head,true
+end
+function injections.handler(head,where)
+  if triggers then
+    head=injectspaces(head)
+  end
+  if nofregisteredmarks>0 or nofregisteredcursives>0 then
+    if trace_injections then
+      report_injections("injection variant %a","everything")
+    end
+    return inject_everything(head,where)
+  elseif nofregisteredpositions>0 then
+    if trace_injections then
+      report_injections("injection variant %a","positions")
+    end
+    return inject_positions_only(head,where)
+  elseif nofregisteredkerns>0 then
+    if trace_injections then
+      report_injections("injection variant %a","kerns")
+    end
+    return inject_kerns_only(head,where)
+  else
+    return head,false
+  end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-ota']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local type=type
+if not trackers then trackers={ register=function() end } end
+local fonts,nodes,node=fonts,nodes,node
+local allocate=utilities.storage.allocate
+local otf=fonts.handlers.otf
+local analyzers=fonts.analyzers
+local initializers=allocate()
+local methods=allocate()
+analyzers.initializers=initializers
+analyzers.methods=methods
+local a_state=attributes.private('state')
+local nuts=nodes.nuts
+local tonut=nuts.tonut
+local getnext=nuts.getnext
+local getprev=nuts.getprev
+local getprev=nuts.getprev
+local getprop=nuts.getprop
+local setprop=nuts.setprop
+local getfont=nuts.getfont
+local getsubtype=nuts.getsubtype
+local getchar=nuts.getchar
+local ischar=nuts.is_char
+local traverse_id=nuts.traverse_id
+local end_of_math=nuts.end_of_math
+local nodecodes=nodes.nodecodes
+local disc_code=nodecodes.disc
+local math_code=nodecodes.math
+local fontdata=fonts.hashes.identifiers
+local categories=characters and characters.categories or {} 
+local chardata=characters and characters.data
+local otffeatures=fonts.constructors.features.otf
+local registerotffeature=otffeatures.register
+local s_init=1  local s_rphf=7
+local s_medi=2  local s_half=8
+local s_fina=3  local s_pref=9
+local s_isol=4  local s_blwf=10
+local s_mark=5  local s_pstf=11
+local s_rest=6
+local states={
+  init=s_init,
+  medi=s_medi,
+  med2=s_medi,
+  fina=s_fina,
+  fin2=s_fina,
+  fin3=s_fina,
+  isol=s_isol,
+  mark=s_mark,
+  rest=s_rest,
+  rphf=s_rphf,
+  half=s_half,
+  pref=s_pref,
+  blwf=s_blwf,
+  pstf=s_pstf,
+}
+local features={
+  init=s_init,
+  medi=s_medi,
+  med2=s_medi,
+  fina=s_fina,
+  fin2=s_fina,
+  fin3=s_fina,
+  isol=s_isol,
+  rphf=s_rphf,
+  half=s_half,
+  pref=s_pref,
+  blwf=s_blwf,
+  pstf=s_pstf,
+}
+analyzers.states=states
+analyzers.features=features
+analyzers.useunicodemarks=false
+function analyzers.setstate(head,font)
+  local useunicodemarks=analyzers.useunicodemarks
+  local tfmdata=fontdata[font]
+  local descriptions=tfmdata.descriptions
+  local first,last,current,n,done=nil,nil,head,0,false 
+  current=tonut(current)
+  while current do
+    local char,id=ischar(current,font)
+    if char and not getprop(current,a_state) then
+      done=true
+      local d=descriptions[char]
+      if d then
+        if d.class=="mark" then
+          done=true
+          setprop(current,a_state,s_mark)
+        elseif useunicodemarks and categories[char]=="mn" then
+          done=true
+          setprop(current,a_state,s_mark)
+        elseif n==0 then
+          first,last,n=current,current,1
+          setprop(current,a_state,s_init)
+        else
+          last,n=current,n+1
+          setprop(current,a_state,s_medi)
+        end
+      else 
+        if first and first==last then
+          setprop(last,a_state,s_isol)
+        elseif last then
+          setprop(last,a_state,s_fina)
+        end
+        first,last,n=nil,nil,0
+      end
+    elseif char==false then
+      if first and first==last then
+        setprop(last,a_state,s_isol)
+      elseif last then
+        setprop(last,a_state,s_fina)
+      end
+      first,last,n=nil,nil,0
+      if id==math_code then
+        current=end_of_math(current)
+      end
+    elseif id==disc_code then
+      setprop(current,a_state,s_medi)
+      last=current
+    else 
+      if first and first==last then
+        setprop(last,a_state,s_isol)
+      elseif last then
+        setprop(last,a_state,s_fina)
+      end
+      first,last,n=nil,nil,0
+      if id==math_code then
+        current=end_of_math(current)
+      end
+    end
+    current=getnext(current)
+  end
+  if first and first==last then
+    setprop(last,a_state,s_isol)
+  elseif last then
+    setprop(last,a_state,s_fina)
+  end
+  return head,done
+end
+local function analyzeinitializer(tfmdata,value) 
+  local script,language=otf.scriptandlanguage(tfmdata) 
+  local action=initializers[script]
+  if not action then
+  elseif type(action)=="function" then
+    return action(tfmdata,value)
+  else
+    local action=action[language]
+    if action then
+      return action(tfmdata,value)
+    end
+  end
+end
+local function analyzeprocessor(head,font,attr)
+  local tfmdata=fontdata[font]
+  local script,language=otf.scriptandlanguage(tfmdata,attr)
+  local action=methods[script]
+  if not action then
+  elseif type(action)=="function" then
+    return action(head,font,attr)
+  else
+    action=action[language]
+    if action then
+      return action(head,font,attr)
+    end
+  end
+  return head,false
+end
+registerotffeature {
+  name="analyze",
+  description="analysis of character classes",
+  default=true,
+  initializers={
+    node=analyzeinitializer,
+  },
+  processors={
+    position=1,
+    node=analyzeprocessor,
+  }
+}
+methods.latn=analyzers.setstate
+local arab_warned={}
+local function warning(current,what)
+  local char=getchar(current)
+  if not arab_warned[char] then
+    log.report("analyze","arab: character %C has no %a class",char,what)
+    arab_warned[char]=true
+  end
+end
+local mappers={
+  l=s_init,
+  d=s_medi,
+  c=s_medi,
+  r=s_fina,
+  u=s_isol,
+}
+local classifiers=characters.classifiers
+if not classifiers then
+  local f_arabic,l_arabic=characters.blockrange("arabic")
+  local f_syriac,l_syriac=characters.blockrange("syriac")
+  local f_mandiac,l_mandiac=characters.blockrange("mandiac")
+  local f_nko,l_nko=characters.blockrange("nko")
+  local f_ext_a,l_ext_a=characters.blockrange("arabicextendeda")
+  classifiers=table.setmetatableindex(function(t,k)
+    if type(k)=="number" then
+      local c=chardata[k]
+      local v=false
+      if c then
+        local arabic=c.arabic
+        if arabic then
+          v=mappers[arabic]
+          if not v then
+            log.report("analyze","error in mapping arabic %C",k)
+            v=false
+          end
+        elseif (k>=f_arabic and k<=l_arabic) or
+            (k>=f_syriac and k<=l_syriac) or
+            (k>=f_mandiac and k<=l_mandiac) or
+            (k>=f_nko   and k<=l_nko)   or
+            (k>=f_ext_a  and k<=l_ext_a)  then
+          if categories[k]=="mn" then
+            v=s_mark
+          else
+            v=s_rest
+          end
+        end
+      end
+      t[k]=v
+      return v
+    end
+  end)
+  characters.classifiers=classifiers
+end
+function methods.arab(head,font,attr)
+  local first,last=nil,nil
+  local c_first,c_last=nil,nil
+  local current,done=head,false
+  current=tonut(current)
+  while current do
+    local char,id=ischar(current,font)
+    if char and not getprop(current,a_state) then
+      done=true
+      local classifier=classifiers[char]
+      if not classifier then
+        if last then
+          if c_last==s_medi or c_last==s_fina then
+            setprop(last,a_state,s_fina)
+          else
+            warning(last,"fina")
+            setprop(last,a_state,s_error)
+          end
+          first,last=nil,nil
+        elseif first then
+          if c_first==s_medi or c_first==s_fina then
+            setprop(first,a_state,s_isol)
+          else
+            warning(first,"isol")
+            setprop(first,a_state,s_error)
+          end
+          first=nil
+        end
+      elseif classifier==s_mark then
+        setprop(current,a_state,s_mark)
+      elseif classifier==s_isol then
+        if last then
+          if c_last==s_medi or c_last==s_fina then
+            setprop(last,a_state,s_fina)
+          else
+            warning(last,"fina")
+            setprop(last,a_state,s_error)
+          end
+          first,last=nil,nil
+        elseif first then
+          if c_first==s_medi or c_first==s_fina then
+            setprop(first,a_state,s_isol)
+          else
+            warning(first,"isol")
+            setprop(first,a_state,s_error)
+          end
+          first=nil
+        end
+        setprop(current,a_state,s_isol)
+      elseif classifier==s_medi then
+        if first then
+          last=current
+          c_last=classifier
+          setprop(current,a_state,s_medi)
+        else
+          setprop(current,a_state,s_init)
+          first=current
+          c_first=classifier
+        end
+      elseif classifier==s_fina then
+        if last then
+          if getprop(last,a_state)~=s_init then
+            setprop(last,a_state,s_medi)
+          end
+          setprop(current,a_state,s_fina)
+          first,last=nil,nil
+        elseif first then
+          setprop(current,a_state,s_fina)
+          first=nil
+        else
+          setprop(current,a_state,s_isol)
+        end
+      else 
+        setprop(current,a_state,s_rest)
+        if last then
+          if c_last==s_medi or c_last==s_fina then
+            setprop(last,a_state,s_fina)
+          else
+            warning(last,"fina")
+            setprop(last,a_state,s_error)
+          end
+          first,last=nil,nil
+        elseif first then
+          if c_first==s_medi or c_first==s_fina then
+            setprop(first,a_state,s_isol)
+          else
+            warning(first,"isol")
+            setprop(first,a_state,s_error)
+          end
+          first=nil
+        end
+      end
+    else
+      if last then
+        if c_last==s_medi or c_last==s_fina then
+          setprop(last,a_state,s_fina)
+        else
+          warning(last,"fina")
+          setprop(last,a_state,s_error)
+        end
+        first,last=nil,nil
+      elseif first then
+        if c_first==s_medi or c_first==s_fina then
+          setprop(first,a_state,s_isol)
+        else
+          warning(first,"isol")
+          setprop(first,a_state,s_error)
+        end
+        first=nil
+      end
+      if id==math_code then 
+        current=end_of_math(current)
+      end
+    end
+    current=getnext(current)
+  end
+  if last then
+    if c_last==s_medi or c_last==s_fina then
+      setprop(last,a_state,s_fina)
+    else
+      warning(last,"fina")
+      setprop(last,a_state,s_error)
+    end
+  elseif first then
+    if c_first==s_medi or c_first==s_fina then
+      setprop(first,a_state,s_isol)
+    else
+      warning(first,"isol")
+      setprop(first,a_state,s_error)
+    end
+  end
+  return head,done
+end
+methods.syrc=methods.arab
+methods.mand=methods.arab
+methods.nko=methods.arab
+directives.register("otf.analyze.useunicodemarks",function(v)
+  analyzers.useunicodemarks=v
+end)
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-ots']={ 
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files",
+}
+local type,next,tonumber=type,next,tonumber
+local random=math.random
+local formatters=string.formatters
+local insert=table.insert
+local registertracker=trackers.register
+local logs=logs
+local trackers=trackers
+local nodes=nodes
+local attributes=attributes
+local fonts=fonts
+local otf=fonts.handlers.otf
+local tracers=nodes.tracers
+local trace_singles=false registertracker("otf.singles",function(v) trace_singles=v end)
+local trace_multiples=false registertracker("otf.multiples",function(v) trace_multiples=v end)
+local trace_alternatives=false registertracker("otf.alternatives",function(v) trace_alternatives=v end)
+local trace_ligatures=false registertracker("otf.ligatures",function(v) trace_ligatures=v end)
+local trace_contexts=false registertracker("otf.contexts",function(v) trace_contexts=v end)
+local trace_marks=false registertracker("otf.marks",function(v) trace_marks=v end)
+local trace_kerns=false registertracker("otf.kerns",function(v) trace_kerns=v end)
+local trace_cursive=false registertracker("otf.cursive",function(v) trace_cursive=v end)
+local trace_preparing=false registertracker("otf.preparing",function(v) trace_preparing=v end)
+local trace_bugs=false registertracker("otf.bugs",function(v) trace_bugs=v end)
+local trace_details=false registertracker("otf.details",function(v) trace_details=v end)
+local trace_steps=false registertracker("otf.steps",function(v) trace_steps=v end)
+local trace_skips=false registertracker("otf.skips",function(v) trace_skips=v end)
+local trace_directions=false registertracker("otf.directions",function(v) trace_directions=v end)
+local trace_plugins=false registertracker("otf.plugins",function(v) trace_plugins=v end)
+local trace_chains=false registertracker("otf.chains",function(v) trace_chains=v end)
+local trace_kernruns=false registertracker("otf.kernruns",function(v) trace_kernruns=v end)
+local trace_discruns=false registertracker("otf.discruns",function(v) trace_discruns=v end)
+local trace_compruns=false registertracker("otf.compruns",function(v) trace_compruns=v end)
+local trace_testruns=false registertracker("otf.testruns",function(v) trace_testruns=v end)
+local forcediscretionaries=false
+local forcepairadvance=false 
+directives.register("otf.forcediscretionaries",function(v)
+  forcediscretionaries=v
+end)
+directives.register("otf.forcepairadvance",function(v)
+  forcepairadvance=v
+end)
+local report_direct=logs.reporter("fonts","otf direct")
+local report_subchain=logs.reporter("fonts","otf subchain")
+local report_chain=logs.reporter("fonts","otf chain")
+local report_process=logs.reporter("fonts","otf process")
+local report_warning=logs.reporter("fonts","otf warning")
+local report_run=logs.reporter("fonts","otf run")
+registertracker("otf.substitutions","otf.singles","otf.multiples","otf.alternatives","otf.ligatures")
+registertracker("otf.positions","otf.marks","otf.kerns","otf.cursive")
+registertracker("otf.actions","otf.substitutions","otf.positions")
+registertracker("otf.sample","otf.steps","otf.substitutions","otf.positions","otf.analyzing")
+registertracker("otf.sample.silent","otf.steps=silent","otf.substitutions","otf.positions","otf.analyzing")
+local nuts=nodes.nuts
+local tonode=nuts.tonode
+local tonut=nuts.tonut
+local getfield=nuts.getfield
+local getnext=nuts.getnext
+local setnext=nuts.setnext
+local getprev=nuts.getprev
+local setprev=nuts.setprev
+local getboth=nuts.getboth
+local setboth=nuts.setboth
+local getid=nuts.getid
+local getattr=nuts.getattr
+local setattr=nuts.setattr
+local getprop=nuts.getprop
+local setprop=nuts.setprop
+local getfont=nuts.getfont
+local getsubtype=nuts.getsubtype
+local setsubtype=nuts.setsubtype
+local getchar=nuts.getchar
+local setchar=nuts.setchar
+local getdisc=nuts.getdisc
+local setdisc=nuts.setdisc
+local setlink=nuts.setlink
+local getcomponents=nuts.getcomponents 
+local setcomponents=nuts.setcomponents 
+local getdir=nuts.getdir
+local getwidth=nuts.getwidth
+local ischar=nuts.is_char
+local usesfont=nuts.uses_font
+local insert_node_after=nuts.insert_after
+local copy_node=nuts.copy
+local copy_node_list=nuts.copy_list
+local remove_node=nuts.remove
+local find_node_tail=nuts.tail
+local flush_node_list=nuts.flush_list
+local flush_node=nuts.flush_node
+local end_of_math=nuts.end_of_math
+local traverse_nodes=nuts.traverse
+local set_components=nuts.set_components
+local take_components=nuts.take_components
+local count_components=nuts.count_components
+local copy_no_components=nuts.copy_no_components
+local copy_only_glyphs=nuts.copy_only_glyphs
+local setmetatable=setmetatable
+local setmetatableindex=table.setmetatableindex
+local nodecodes=nodes.nodecodes
+local glyphcodes=nodes.glyphcodes
+local disccodes=nodes.disccodes
+local glyph_code=nodecodes.glyph
+local glue_code=nodecodes.glue
+local disc_code=nodecodes.disc
+local math_code=nodecodes.math
+local dir_code=nodecodes.dir
+local localpar_code=nodecodes.localpar
+local discretionary_code=disccodes.discretionary
+local ligature_code=glyphcodes.ligature
+local a_state=attributes.private('state')
+local a_noligature=attributes.private("noligature")
+local injections=nodes.injections
+local setmark=injections.setmark
+local setcursive=injections.setcursive
+local setkern=injections.setkern
+local setmove=injections.setmove
+local setposition=injections.setposition
+local resetinjection=injections.reset
+local copyinjection=injections.copy
+local setligaindex=injections.setligaindex
+local getligaindex=injections.getligaindex
+local fontdata=fonts.hashes.identifiers
+local fontfeatures=fonts.hashes.features
+local otffeatures=fonts.constructors.features.otf
+local registerotffeature=otffeatures.register
+local onetimemessage=fonts.loggers.onetimemessage or function() end
+local getrandom=utilities and utilities.randomizer and utilities.randomizer.get
+otf.defaultnodealternate="none"
+local tfmdata=false
+local characters=false
+local descriptions=false
+local marks=false
+local classes=false
+local currentfont=false
+local factor=0
+local threshold=0
+local checkmarks=false
+local discs=false
+local spaces=false
+local sweepnode=nil
+local sweephead={} 
+local notmatchpre={} 
+local notmatchpost={} 
+local notmatchreplace={} 
+local handlers={}
+local isspace=injections.isspace
+local getthreshold=injections.getthreshold
+local checkstep=(tracers and tracers.steppers.check)  or function() end
+local registerstep=(tracers and tracers.steppers.register) or function() end
+local registermessage=(tracers and tracers.steppers.message) or function() end
+local function logprocess(...)
+  if trace_steps then
+    registermessage(...)
+    if trace_steps=="silent" then
+      return
+    end
+  end
+  report_direct(...)
+end
+local function logwarning(...)
+  report_direct(...)
+end
+local gref do
+  local f_unicode=formatters["U+%X"]   
+  local f_uniname=formatters["U+%X (%s)"] 
+  local f_unilist=formatters["% t (% t)"]
+  gref=function(n) 
+    if type(n)=="number" then
+      local description=descriptions[n]
+      local name=description and description.name
+      if name then
+        return f_uniname(n,name)
+      else
+        return f_unicode(n)
+      end
+    elseif n then
+      local num,nam={},{}
+      for i=1,#n do
+        local ni=n[i]
+        if tonumber(ni) then 
+          local di=descriptions[ni]
+          num[i]=f_unicode(ni)
+          nam[i]=di and di.name or "-"
+        end
+      end
+      return f_unilist(num,nam)
+    else
+      return "<error in node mode tracing>"
+    end
+  end
+end
+local function cref(dataset,sequence,index)
+  if not dataset then
+    return "no valid dataset"
+  end
+  local merged=sequence.merged and "merged " or ""
+  if index then
+    return formatters["feature %a, type %a, %schain lookup %a, index %a"](
+      dataset[4],sequence.type,merged,sequence.name,index)
+  else
+    return formatters["feature %a, type %a, %schain lookup %a"](
+      dataset[4],sequence.type,merged,sequence.name)
+  end
+end
+local function pref(dataset,sequence)
+  return formatters["feature %a, type %a, %slookup %a"](
+    dataset[4],sequence.type,sequence.merged and "merged " or "",sequence.name)
+end
+local function mref(rlmode)
+  if not rlmode or rlmode==0 then
+    return "---"
+  elseif rlmode==-1 or rlmode=="+TRT" then
+    return "r2l"
+  else
+    return "l2r"
+  end
+end
+local function flattendisk(head,disc)
+  local pre,post,replace,pretail,posttail,replacetail=getdisc(disc,true)
+  local prev,next=getboth(disc)
+  local ishead=head==disc
+  setdisc(disc)
+  flush_node(disc)
+  if pre then
+    flush_node_list(pre)
+  end
+  if post then
+    flush_node_list(post)
+  end
+  if ishead then
+    if replace then
+      if next then
+        setlink(replacetail,next)
+      end
+      return replace,replace
+    elseif next then
+      return next,next
+    else
+    end
+  else
+    if replace then
+      if next then
+        setlink(replacetail,next)
+      end
+      setlink(prev,replace)
+      return head,replace
+    else
+      setlink(prev,next) 
+      return head,next
+    end
+  end
+end
+local function appenddisc(disc,list)
+  local pre,post,replace,pretail,posttail,replacetail=getdisc(disc,true)
+  local posthead=list
+  local replacehead=copy_node_list(list)
+  if post then
+    setlink(posttail,posthead)
+  else
+    post=posthead
+  end
+  if replace then
+    setlink(replacetail,replacehead)
+  else
+    replace=replacehead
+  end
+  setdisc(disc,pre,post,replace)
+end
+local take_components=getcomponents 
+local set_components=setcomponents
+local function count_components(start,marks)
+  if getid(start)~=glyph_code then
+    return 0
+  elseif getsubtype(start)==ligature_code then
+    local i=0
+    local components=getcomponents(start)
+    while components do
+      i=i+count_components(components,marks)
+      components=getnext(components)
+    end
+    return i
+  elseif not marks[getchar(start)] then
+    return 1
+  else
+    return 0
+  end
+end
+local function markstoligature(head,start,stop,char)
+  if start==stop and getchar(start)==char then
+    return head,start
+  else
+    local prev=getprev(start)
+    local next=getnext(stop)
+    setprev(start)
+    setnext(stop)
+    local base=copy_no_components(start,copyinjection)
+    if head==start then
+      head=base
+    end
+    resetinjection(base)
+    setchar(base,char)
+    setsubtype(base,ligature_code)
+    set_components(base,start)
+    setlink(prev,base,next)
+    return head,base
+  end
+end
+local function toligature(head,start,stop,char,dataset,sequence,skiphash,discfound,hasmarks) 
+  if getattr(start,a_noligature)==1 then
+    return head,start
+  end
+  if start==stop and getchar(start)==char then
+    resetinjection(start)
+    setchar(start,char)
+    return head,start
+  end
+  local prev=getprev(start)
+  local next=getnext(stop)
+  local comp=start
+  setprev(start)
+  setnext(stop)
+  local base=copy_no_components(start,copyinjection)
+  if start==head then
+    head=base
+  end
+  resetinjection(base)
+  setchar(base,char)
+  setsubtype(base,ligature_code)
+  set_components(base,comp)
+  setlink(prev,base,next)
+  if not discfound then
+    local deletemarks=not skiphash or hasmarks
+    local components=start
+    local baseindex=0
+    local componentindex=0
+    local head=base
+    local current=base
+    while start do
+      local char=getchar(start)
+      if not marks[char] then
+        baseindex=baseindex+componentindex
+        componentindex=count_components(start,marks)
+      elseif not deletemarks then
+        setligaindex(start,baseindex+getligaindex(start,componentindex))
+        if trace_marks then
+          logwarning("%s: keep mark %s, gets index %s",pref(dataset,sequence),gref(char),getligaindex(start))
+        end
+        local n=copy_node(start)
+        copyinjection(n,start)
+        head,current=insert_node_after(head,current,n) 
+      elseif trace_marks then
+        logwarning("%s: delete mark %s",pref(dataset,sequence),gref(char))
+      end
+      start=getnext(start)
+    end
+    local start=getnext(current)
+    while start do
+      local char=ischar(start)
+      if char then
+        if marks[char] then
+          setligaindex(start,baseindex+getligaindex(start,componentindex))
+          if trace_marks then
+            logwarning("%s: set mark %s, gets index %s",pref(dataset,sequence),gref(char),getligaindex(start))
+          end
+          start=getnext(start)
+        else
+          break
+        end
+      else
+        break
+      end
+    end
+  else
+    local discprev,discnext=getboth(discfound)
+    if discprev and discnext then
+      local pre,post,replace,pretail,posttail,replacetail=getdisc(discfound,true)
+      if not replace then
+        local prev=getprev(base)
+        local comp=take_components(base)
+        local copied=copy_only_glyphs(comp)
+        if pre then
+          setlink(discprev,pre)
+        else
+          setnext(discprev) 
+        end
+        pre=comp
+        if post then
+          setlink(posttail,discnext)
+          setprev(post)
+        else
+          post=discnext
+          setprev(discnext) 
+        end
+        setlink(prev,discfound,next)
+        setboth(base)
+        set_components(base,copied)
+        replace=base
+        if forcediscretionaries then
+          setdisc(discfound,pre,post,replace,discretionary_code)
+        else
+          setdisc(discfound,pre,post,replace)
+        end
+        base=prev
+      end
+    end
+  end
+  return head,base
+end
+local function multiple_glyphs(head,start,multiple,skiphash,what) 
+  local nofmultiples=#multiple
+  if nofmultiples>0 then
+    resetinjection(start)
+    setchar(start,multiple[1])
+    if nofmultiples>1 then
+      local sn=getnext(start)
+      for k=2,nofmultiples do
+        local n=copy_node(start) 
+        resetinjection(n)
+        setchar(n,multiple[k])
+        insert_node_after(head,start,n)
+        start=n
+      end
+      if what==true then
+      elseif what>1 then
+        local m=multiple[nofmultiples]
+        for i=2,what do
+          local n=copy_node(start) 
+          resetinjection(n)
+          setchar(n,m)
+          insert_node_after(head,start,n)
+          start=n
+        end
+      end
+    end
+    return head,start,true
+  else
+    if trace_multiples then
+      logprocess("no multiple for %s",gref(getchar(start)))
+    end
+    return head,start,false
+  end
+end
+local function get_alternative_glyph(start,alternatives,value)
+  local n=#alternatives
+  if n==1 then
+    return alternatives[1],trace_alternatives and "1 (only one present)"
+  elseif value=="random" then
+    local r=getrandom and getrandom("glyph",1,n) or random(1,n)
+    return alternatives[r],trace_alternatives and formatters["value %a, taking %a"](value,r)
+  elseif value=="first" then
+    return alternatives[1],trace_alternatives and formatters["value %a, taking %a"](value,1)
+  elseif value=="last" then
+    return alternatives[n],trace_alternatives and formatters["value %a, taking %a"](value,n)
+  end
+  value=value==true and 1 or tonumber(value)
+  if type(value)~="number" then
+    return alternatives[1],trace_alternatives and formatters["invalid value %s, taking %a"](value,1)
+  end
+  if value>n then
+    local defaultalt=otf.defaultnodealternate
+    if defaultalt=="first" then
+      return alternatives[n],trace_alternatives and formatters["invalid value %s, taking %a"](value,1)
+    elseif defaultalt=="last" then
+      return alternatives[1],trace_alternatives and formatters["invalid value %s, taking %a"](value,n)
+    else
+      return false,trace_alternatives and formatters["invalid value %a, %s"](value,"out of range")
+    end
+  elseif value==0 then
+    return getchar(start),trace_alternatives and formatters["invalid value %a, %s"](value,"no change")
+  elseif value<1 then
+    return alternatives[1],trace_alternatives and formatters["invalid value %a, taking %a"](value,1)
+  else
+    return alternatives[value],trace_alternatives and formatters["value %a, taking %a"](value,value)
+  end
+end
+function handlers.gsub_single(head,start,dataset,sequence,replacement)
+  if trace_singles then
+    logprocess("%s: replacing %s by single %s",pref(dataset,sequence),gref(getchar(start)),gref(replacement))
+  end
+  resetinjection(start)
+  setchar(start,replacement)
+  return head,start,true
+end
+function handlers.gsub_alternate(head,start,dataset,sequence,alternative)
+  local kind=dataset[4]
+  local what=dataset[1]
+  local value=what==true and tfmdata.shared.features[kind] or what
+  local choice,comment=get_alternative_glyph(start,alternative,value)
+  if choice then
+    if trace_alternatives then
+      logprocess("%s: replacing %s by alternative %a to %s, %s",pref(dataset,sequence),gref(getchar(start)),gref(choice),comment)
+    end
+    resetinjection(start)
+    setchar(start,choice)
+  else
+    if trace_alternatives then
+      logwarning("%s: no variant %a for %s, %s",pref(dataset,sequence),value,gref(getchar(start)),comment)
+    end
+  end
+  return head,start,true
+end
+function handlers.gsub_multiple(head,start,dataset,sequence,multiple,rlmode,skiphash)
+  if trace_multiples then
+    logprocess("%s: replacing %s by multiple %s",pref(dataset,sequence),gref(getchar(start)),gref(multiple))
+  end
+  return multiple_glyphs(head,start,multiple,skiphash,dataset[1])
+end
+function handlers.gsub_ligature(head,start,dataset,sequence,ligature,rlmode,skiphash)
+  local current=getnext(start)
+  if not current then
+    return head,start,false,nil
+  end
+  local stop=nil
+  local startchar=getchar(start)
+  if skiphash and skiphash[startchar] then
+    while current do
+      local char=ischar(current,currentfont)
+      if char then
+        local lg=ligature[char]
+        if lg then
+          stop=current
+          ligature=lg
+          current=getnext(current)
+        else
+          break
+        end
+      else
+        break
+      end
+    end
+    if stop then
+      local lig=ligature.ligature
+      if lig then
+        if trace_ligatures then
+          local stopchar=getchar(stop)
+          head,start=markstoligature(head,start,stop,lig)
+          logprocess("%s: replacing %s upto %s by ligature %s case 1",pref(dataset,sequence),gref(startchar),gref(stopchar),gref(getchar(start)))
+        else
+          head,start=markstoligature(head,start,stop,lig)
+        end
+        return head,start,true,false
+      else
+      end
+    end
+  else 
+    local discfound=false
+    local lastdisc=nil
+    local hasmarks=marks[startchar]
+    while current do
+      local char,id=ischar(current,currentfont)
+      if char then
+        if skiphash and skiphash[char] then
+          current=getnext(current)
+        else 
+          local lg=ligature[char] 
+          if lg then
+            if not discfound and lastdisc then
+              discfound=lastdisc
+              lastdisc=nil
+            end
+            if marks[char] then
+              hasmarks=true
+            end
+            stop=current 
+            ligature=lg
+            current=getnext(current)
+          else
+            break
+          end
+        end
+      elseif char==false then
+        break
+      elseif id==disc_code then
+        local replace=getfield(current,"replace") 
+        if replace then
+          while replace do
+            local char,id=ischar(replace,currentfont)
+            if char then
+              local lg=ligature[char] 
+              if lg then
+                if marks[char] then
+                  hasmarks=true 
+                end
+                ligature=lg
+                replace=getnext(replace)
+              else
+                return head,start,false,false
+              end
+            else
+              return head,start,false,false
+            end
+          end
+          stop=current
+        end
+        lastdisc=current
+        current=getnext(current)
+      else
+        break
+      end
+    end
+    local lig=ligature.ligature
+    if lig then
+      if stop then
+        if trace_ligatures then
+          local stopchar=getchar(stop)
+          head,start=toligature(head,start,stop,lig,dataset,sequence,skiphash,discfound,hasmarks)
+          logprocess("%s: replacing %s upto %s by ligature %s case 2",pref(dataset,sequence),gref(startchar),gref(stopchar),gref(lig))
+        else
+          head,start=toligature(head,start,stop,lig,dataset,sequence,skiphash,discfound,hasmarks)
+        end
+      else
+        resetinjection(start)
+        setchar(start,lig)
+        if trace_ligatures then
+          logprocess("%s: replacing %s by (no real) ligature %s case 3",pref(dataset,sequence),gref(startchar),gref(lig))
+        end
+      end
+      return head,start,true,discfound
+    else
+    end
+  end
+  return head,start,false,discfound
+end
+function handlers.gpos_single(head,start,dataset,sequence,kerns,rlmode,skiphash,step,injection)
+  local startchar=getchar(start)
+  local format=step.format
+  if format=="single" or type(kerns)=="table" then 
+    local dx,dy,w,h=setposition(0,start,factor,rlmode,kerns,injection)
+    if trace_kerns then
+      logprocess("%s: shifting single %s by %s xy (%p,%p) and wh (%p,%p)",pref(dataset,sequence),gref(startchar),format,dx,dy,w,h)
+    end
+  else
+    local k=(format=="move" and setmove or setkern)(start,factor,rlmode,kerns,injection)
+    if trace_kerns then
+      logprocess("%s: shifting single %s by %s %p",pref(dataset,sequence),gref(startchar),format,k)
+    end
+  end
+  return head,start,true
+end
+function handlers.gpos_pair(head,start,dataset,sequence,kerns,rlmode,skiphash,step,injection)
+  local snext=getnext(start)
+  if not snext then
+    return head,start,false
+  else
+    local prev=start
+    while snext do
+      local nextchar=ischar(snext,currentfont)
+      if nextchar then
+        if skiphash and skiphash[nextchar] then 
+          prev=snext
+          snext=getnext(snext)
+        else
+          local krn=kerns[nextchar]
+          if not krn then
+            break
+          end
+          local format=step.format
+          if format=="pair" then
+            local a,b=krn[1],krn[2]
+            if a==true then
+            elseif a then 
+              local x,y,w,h=setposition(1,start,factor,rlmode,a,injection)
+              if trace_kerns then
+                local startchar=getchar(start)
+                logprocess("%s: shifting first of pair %s and %s by xy (%p,%p) and wh (%p,%p) as %s",pref(dataset,sequence),gref(startchar),gref(nextchar),x,y,w,h,injection or "injections")
+              end
+            end
+            if b==true then
+              start=snext 
+            elseif b then 
+              local x,y,w,h=setposition(2,snext,factor,rlmode,b,injection)
+              if trace_kerns then
+                local startchar=getchar(snext)
+                logprocess("%s: shifting second of pair %s and %s by xy (%p,%p) and wh (%p,%p) as %s",pref(dataset,sequence),gref(startchar),gref(nextchar),x,y,w,h,injection or "injections")
+              end
+              start=snext 
+            elseif forcepairadvance then
+              start=snext 
+            end
+            return head,start,true
+          elseif krn~=0 then
+            local k=(format=="move" and setmove or setkern)(snext,factor,rlmode,krn,injection)
+            if trace_kerns then
+              logprocess("%s: inserting %s %p between %s and %s as %s",pref(dataset,sequence),format,k,gref(getchar(prev)),gref(nextchar),injection or "injections")
+            end
+            return head,start,true
+          else 
+            break
+          end
+        end
+      else
+        break
+      end
+    end
+    return head,start,false
+  end
+end
+function handlers.gpos_mark2base(head,start,dataset,sequence,markanchors,rlmode,skiphash)
+  local markchar=getchar(start)
+  if marks[markchar] then
+    local base=getprev(start) 
+    if base then
+      local basechar=ischar(base,currentfont)
+      if basechar then
+        if marks[basechar] then
+          while base do
+            base=getprev(base)
+            if base then
+              basechar=ischar(base,currentfont)
+              if basechar then
+                if not marks[basechar] then
+                  break
+                end
+              else
+                if trace_bugs then
+                  logwarning("%s: no base for mark %s, case %i",pref(dataset,sequence),gref(markchar),1)
+                end
+                return head,start,false
+              end
+            else
+              if trace_bugs then
+                logwarning("%s: no base for mark %s, case %i",pref(dataset,sequence),gref(markchar),2)
+              end
+              return head,start,false
+            end
+          end
+        end
+        local ba=markanchors[1][basechar]
+        if ba then
+          local ma=markanchors[2]
+          local dx,dy,bound=setmark(start,base,factor,rlmode,ba,ma,characters[basechar],false,checkmarks)
+          if trace_marks then
+            logprocess("%s, bound %s, anchoring mark %s to basechar %s => (%p,%p)",
+              pref(dataset,sequence),bound,gref(markchar),gref(basechar),dx,dy)
+          end
+          return head,start,true
+        elseif trace_bugs then
+          logwarning("%s: mark %s is not anchored to %s",pref(dataset,sequence),gref(markchar),gref(basechar))
+        end
+      elseif trace_bugs then
+        logwarning("%s: nothing preceding, case %i",pref(dataset,sequence),1)
+      end
+    elseif trace_bugs then
+      logwarning("%s: nothing preceding, case %i",pref(dataset,sequence),2)
+    end
+  elseif trace_bugs then
+    logwarning("%s: mark %s is no mark",pref(dataset,sequence),gref(markchar))
+  end
+  return head,start,false
+end
+function handlers.gpos_mark2ligature(head,start,dataset,sequence,markanchors,rlmode,skiphash)
+  local markchar=getchar(start)
+  if marks[markchar] then
+    local base=getprev(start) 
+    if base then
+      local basechar=ischar(base,currentfont)
+      if basechar then
+        if marks[basechar] then
+          while base do
+            base=getprev(base)
+            if base then
+              basechar=ischar(base,currentfont)
+              if basechar then
+                if not marks[basechar] then
+                  break
+                end
+              else
+                if trace_bugs then
+                  logwarning("%s: no base for mark %s, case %i",pref(dataset,sequence),gref(markchar),1)
+                end
+                return head,start,false
+              end
+            else
+              if trace_bugs then
+                logwarning("%s: no base for mark %s, case %i",pref(dataset,sequence),gref(markchar),2)
+              end
+              return head,start,false
+            end
+          end
+        end
+        local ba=markanchors[1][basechar]
+        if ba then
+          local ma=markanchors[2]
+          if ma then
+            local index=getligaindex(start)
+            ba=ba[index]
+            if ba then
+              local dx,dy,bound=setmark(start,base,factor,rlmode,ba,ma,characters[basechar],false,checkmarks)
+              if trace_marks then
+                logprocess("%s, index %s, bound %s, anchoring mark %s to baselig %s at index %s => (%p,%p)",
+                  pref(dataset,sequence),index,bound,gref(markchar),gref(basechar),index,dx,dy)
+              end
+              return head,start,true
+            else
+              if trace_bugs then
+                logwarning("%s: no matching anchors for mark %s and baselig %s with index %a",pref(dataset,sequence),gref(markchar),gref(basechar),index)
+              end
+            end
+          end
+        elseif trace_bugs then
+          onetimemessage(currentfont,basechar,"no base anchors",report_fonts)
+        end
+      elseif trace_bugs then
+        logwarning("%s: prev node is no char, case %i",pref(dataset,sequence),1)
+      end
+    elseif trace_bugs then
+      logwarning("%s: prev node is no char, case %i",pref(dataset,sequence),2)
+    end
+  elseif trace_bugs then
+    logwarning("%s: mark %s is no mark",pref(dataset,sequence),gref(markchar))
+  end
+  return head,start,false
+end
+function handlers.gpos_mark2mark(head,start,dataset,sequence,markanchors,rlmode,skiphash)
+  local markchar=getchar(start)
+  if marks[markchar] then
+    local base=getprev(start) 
+    local slc=getligaindex(start)
+    if slc then 
+      while base do
+        local blc=getligaindex(base)
+        if blc and blc~=slc then
+          base=getprev(base)
+        else
+          break
+        end
+      end
+    end
+    if base then
+      local basechar=ischar(base,currentfont)
+      if basechar then 
+        local ba=markanchors[1][basechar] 
+        if ba then
+          local ma=markanchors[2]
+          local dx,dy,bound=setmark(start,base,factor,rlmode,ba,ma,characters[basechar],true,checkmarks)
+          if trace_marks then
+            logprocess("%s, bound %s, anchoring mark %s to basemark %s => (%p,%p)",
+              pref(dataset,sequence),bound,gref(markchar),gref(basechar),dx,dy)
+          end
+          return head,start,true
+        end
+      end
+    end
+  elseif trace_bugs then
+    logwarning("%s: mark %s is no mark",pref(dataset,sequence),gref(markchar))
+  end
+  return head,start,false
+end
+function handlers.gpos_cursive(head,start,dataset,sequence,exitanchors,rlmode,skiphash,step) 
+  local startchar=getchar(start)
+  if marks[startchar] then
+    if trace_cursive then
+      logprocess("%s: ignoring cursive for mark %s",pref(dataset,sequence),gref(startchar))
+    end
+  else
+    local nxt=getnext(start)
+    while nxt do
+      local nextchar=ischar(nxt,currentfont)
+      if not nextchar then
+        break
+      elseif marks[nextchar] then 
+        nxt=getnext(nxt)
+      else
+        local exit=exitanchors[3]
+        if exit then
+          local entry=exitanchors[1][nextchar]
+          if entry then
+            entry=entry[2]
+            if entry then
+              local r2lflag=sequence.flags[4] 
+              local dx,dy,bound=setcursive(start,nxt,factor,rlmode,exit,entry,characters[startchar],characters[nextchar],r2lflag)
+              if trace_cursive then
+                logprocess("%s: moving %s to %s cursive (%p,%p) using bound %s in %s mode",pref(dataset,sequence),gref(startchar),gref(nextchar),dx,dy,bound,mref(rlmode))
+              end
+              return head,start,true
+            end
+          end
+        end
+        break
+      end
+    end
+  end
+  return head,start,false
+end
+local chainprocs={}
+local function logprocess(...)
+  if trace_steps then
+    registermessage(...)
+    if trace_steps=="silent" then
+      return
+    end
+  end
+  report_subchain(...)
+end
+local logwarning=report_subchain
+local function logprocess(...)
+  if trace_steps then
+    registermessage(...)
+    if trace_steps=="silent" then
+      return
+    end
+  end
+  report_chain(...)
+end
+local logwarning=report_chain
+local function reversesub(head,start,stop,dataset,sequence,replacements,rlmode,skiphash)
+  local char=getchar(start)
+  local replacement=replacements[char]
+  if replacement then
+    if trace_singles then
+      logprocess("%s: single reverse replacement of %s by %s",cref(dataset,sequence),gref(char),gref(replacement))
+    end
+    resetinjection(start)
+    setchar(start,replacement)
+    return head,start,true
+  else
+    return head,start,false
+  end
+end
+chainprocs.reversesub=reversesub
+local function reportzerosteps(dataset,sequence)
+  logwarning("%s: no steps",cref(dataset,sequence))
+end
+local function reportmoresteps(dataset,sequence)
+  logwarning("%s: more than 1 step",cref(dataset,sequence))
+end
+local function getmapping(dataset,sequence,currentlookup)
+  local steps=currentlookup.steps
+  local nofsteps=currentlookup.nofsteps
+  if nofsteps==0 then
+    reportzerosteps(dataset,sequence)
+    currentlookup.mapping=false
+    return false
+  else
+    if nofsteps>1 then
+      reportmoresteps(dataset,sequence)
+    end
+    local mapping=steps[1].coverage
+    currentlookup.mapping=mapping
+    currentlookup.format=steps[1].format
+    return mapping
+  end
+end
+function chainprocs.gsub_single(head,start,stop,dataset,sequence,currentlookup,rlmode,skiphash,chainindex)
+  local mapping=currentlookup.mapping
+  if mapping==nil then
+    mapping=getmapping(dataset,sequence,currentlookup)
+  end
+  if mapping then
+    local current=start
+    while current do
+      local currentchar=ischar(current)
+      if currentchar then
+        local replacement=mapping[currentchar]
+        if not replacement or replacement=="" then
+          if trace_bugs then
+            logwarning("%s: no single for %s",cref(dataset,sequence,chainindex),gref(currentchar))
+          end
+        else
+          if trace_singles then
+            logprocess("%s: replacing single %s by %s",cref(dataset,sequence,chainindex),gref(currentchar),gref(replacement))
+          end
+          resetinjection(current)
+          setchar(current,replacement)
+        end
+        return head,start,true
+      elseif currentchar==false then
+        break
+      elseif current==stop then
+        break
+      else
+        current=getnext(current)
+      end
+    end
+  end
+  return head,start,false
+end
+function chainprocs.gsub_alternate(head,start,stop,dataset,sequence,currentlookup,rlmode,skiphash,chainindex)
+  local mapping=currentlookup.mapping
+  if mapping==nil then
+    mapping=getmapping(dataset,sequence,currentlookup)
+  end
+  if mapping then
+    local kind=dataset[4]
+    local what=dataset[1]
+    local value=what==true and tfmdata.shared.features[kind] or what 
+    local current=start
+    while current do
+      local currentchar=ischar(current)
+      if currentchar then
+        local alternatives=mapping[currentchar]
+        if alternatives then
+          local choice,comment=get_alternative_glyph(current,alternatives,value)
+          if choice then
+            if trace_alternatives then
+              logprocess("%s: replacing %s by alternative %a to %s, %s",cref(dataset,sequence),gref(currentchar),choice,gref(choice),comment)
+            end
+            resetinjection(start)
+            setchar(start,choice)
+          else
+            if trace_alternatives then
+              logwarning("%s: no variant %a for %s, %s",cref(dataset,sequence),value,gref(currentchar),comment)
+            end
+          end
+        end
+        return head,start,true
+      elseif currentchar==false then
+        break
+      elseif current==stop then
+        break
+      else
+        current=getnext(current)
+      end
+    end
+  end
+  return head,start,false
+end
+function chainprocs.gsub_multiple(head,start,stop,dataset,sequence,currentlookup,rlmode,skiphash,chainindex)
+  local mapping=currentlookup.mapping
+  if mapping==nil then
+    mapping=getmapping(dataset,sequence,currentlookup)
+  end
+  if mapping then
+    local startchar=getchar(start)
+    local replacement=mapping[startchar]
+    if not replacement or replacement=="" then
+      if trace_bugs then
+        logwarning("%s: no multiple for %s",cref(dataset,sequence),gref(startchar))
+      end
+    else
+      if trace_multiples then
+        logprocess("%s: replacing %s by multiple characters %s",cref(dataset,sequence),gref(startchar),gref(replacement))
+      end
+      return multiple_glyphs(head,start,replacement,skiphash,dataset[1])
+    end
+  end
+  return head,start,false
+end
+function chainprocs.gsub_ligature(head,start,stop,dataset,sequence,currentlookup,rlmode,skiphash,chainindex)
+  local mapping=currentlookup.mapping
+  if mapping==nil then
+    mapping=getmapping(dataset,sequence,currentlookup)
+  end
+  if mapping then
+    local startchar=getchar(start)
+    local ligatures=mapping[startchar]
+    if not ligatures then
+      if trace_bugs then
+        logwarning("%s: no ligatures starting with %s",cref(dataset,sequence,chainindex),gref(startchar))
+      end
+    else
+      local hasmarks=marks[startchar]
+      local current=getnext(start)
+      local discfound=false
+      local last=stop
+      local nofreplacements=1
+      while current do
+        local id=getid(current)
+        if id==disc_code then
+          if not discfound then
+            discfound=current
+          end
+          if current==stop then
+            break 
+          else
+            current=getnext(current)
+          end
+        else
+          local schar=getchar(current)
+          if skiphash and skiphash[schar] then
+              current=getnext(current)
+          else
+            local lg=ligatures[schar]
+            if lg then
+              ligatures=lg
+              last=current
+              nofreplacements=nofreplacements+1
+              if marks[char] then
+                hasmarks=true
+              end
+              if current==stop then
+                break
+              else
+                current=getnext(current)
+              end
+            else
+              break
+            end
+          end
+        end
+      end
+      local ligature=ligatures.ligature
+      if ligature then
+        if chainindex then
+          stop=last
+        end
+        if trace_ligatures then
+          if start==stop then
+            logprocess("%s: replacing character %s by ligature %s case 3",cref(dataset,sequence,chainindex),gref(startchar),gref(ligature))
+          else
+            logprocess("%s: replacing character %s upto %s by ligature %s case 4",cref(dataset,sequence,chainindex),gref(startchar),gref(getchar(stop)),gref(ligature))
+          end
+        end
+        head,start=toligature(head,start,stop,ligature,dataset,sequence,skiphash,discfound,hasmarks)
+        return head,start,true,nofreplacements,discfound
+      elseif trace_bugs then
+        if start==stop then
+          logwarning("%s: replacing character %s by ligature fails",cref(dataset,sequence,chainindex),gref(startchar))
+        else
+          logwarning("%s: replacing character %s upto %s by ligature fails",cref(dataset,sequence,chainindex),gref(startchar),gref(getchar(stop)))
+        end
+      end
+    end
+  end
+  return head,start,false,0,false
+end
+function chainprocs.gpos_single(head,start,stop,dataset,sequence,currentlookup,rlmode,skiphash,chainindex)
+  local mapping=currentlookup.mapping
+  if mapping==nil then
+    mapping=getmapping(dataset,sequence,currentlookup)
+  end
+  if mapping then
+    local startchar=getchar(start)
+    local kerns=mapping[startchar]
+    if kerns then
+      local format=currentlookup.format
+      if format=="single" then
+        local dx,dy,w,h=setposition(0,start,factor,rlmode,kerns) 
+        if trace_kerns then
+          logprocess("%s: shifting single %s by %s (%p,%p) and correction (%p,%p)",cref(dataset,sequence),gref(startchar),format,dx,dy,w,h)
+        end
+      else 
+        local k=(format=="move" and setmove or setkern)(start,factor,rlmode,kerns,injection)
+        if trace_kerns then
+          logprocess("%s: shifting single %s by %s %p",cref(dataset,sequence),gref(startchar),format,k)
+        end
+      end
+      return head,start,true
+    end
+  end
+  return head,start,false
+end
+function chainprocs.gpos_pair(head,start,stop,dataset,sequence,currentlookup,rlmode,skiphash,chainindex) 
+  local mapping=currentlookup.mapping
+  if mapping==nil then
+    mapping=getmapping(dataset,sequence,currentlookup)
+  end
+  if mapping then
+    local snext=getnext(start)
+    if snext then
+      local startchar=getchar(start)
+      local kerns=mapping[startchar] 
+      if kerns then
+        local prev=start
+        while snext do
+          local nextchar=ischar(snext,currentfont)
+          if not nextchar then
+            break
+          end
+          if skiphash and skiphash[nextchar] then
+            prev=snext
+            snext=getnext(snext)
+          else
+            local krn=kerns[nextchar]
+            if not krn then
+              break
+            end
+            local format=currentlookup.format
+            if format=="pair" then
+              local a,b=krn[1],krn[2]
+              if a==true then
+              elseif a then
+                local x,y,w,h=setposition(1,start,factor,rlmode,a,"injections") 
+                if trace_kerns then
+                  local startchar=getchar(start)
+                  logprocess("%s: shifting first of pair %s and %s by (%p,%p) and correction (%p,%p)",cref(dataset,sequence),gref(startchar),gref(nextchar),x,y,w,h)
+                end
+              end
+              if b==true then
+                start=snext 
+              elseif b then 
+                local x,y,w,h=setposition(2,snext,factor,rlmode,b,"injections")
+                if trace_kerns then
+                  local startchar=getchar(start)
+                  logprocess("%s: shifting second of pair %s and %s by (%p,%p) and correction (%p,%p)",cref(dataset,sequence),gref(startchar),gref(nextchar),x,y,w,h)
+                end
+                start=snext 
+              elseif forcepairadvance then
+                start=snext 
+              end
+              return head,start,true
+            elseif krn~=0 then
+              local k=(format=="move" and setmove or setkern)(snext,factor,rlmode,krn)
+              if trace_kerns then
+                logprocess("%s: inserting %s %p between %s and %s",cref(dataset,sequence),format,k,gref(getchar(prev)),gref(nextchar))
+              end
+              return head,start,true
+            else
+              break
+            end
+          end
+        end
+      end
+    end
+  end
+  return head,start,false
+end
+function chainprocs.gpos_mark2base(head,start,stop,dataset,sequence,currentlookup,rlmode,skiphash,chainindex)
+  local mapping=currentlookup.mapping
+  if mapping==nil then
+    mapping=getmapping(dataset,sequence,currentlookup)
+  end
+  if mapping then
+    local markchar=getchar(start)
+    if marks[markchar] then
+      local markanchors=mapping[markchar] 
+      if markanchors then
+        local base=getprev(start) 
+        if base then
+          local basechar=ischar(base,currentfont)
+          if basechar then
+            if marks[basechar] then
+              while base do
+                base=getprev(base)
+                if base then
+                  local basechar=ischar(base,currentfont)
+                  if basechar then
+                    if not marks[basechar] then
+                      break
+                    end
+                  else
+                    if trace_bugs then
+                      logwarning("%s: no base for mark %s, case %i",pref(dataset,sequence),gref(markchar),1)
+                    end
+                    return head,start,false
+                  end
+                else
+                  if trace_bugs then
+                    logwarning("%s: no base for mark %s, case %i",pref(dataset,sequence),gref(markchar),2)
+                  end
+                  return head,start,false
+                end
+              end
+            end
+            local ba=markanchors[1][basechar]
+            if ba then
+              local ma=markanchors[2]
+              if ma then
+                local dx,dy,bound=setmark(start,base,factor,rlmode,ba,ma,characters[basechar],false,checkmarks)
+                if trace_marks then
+                  logprocess("%s, bound %s, anchoring mark %s to basechar %s => (%p,%p)",
+                    cref(dataset,sequence),bound,gref(markchar),gref(basechar),dx,dy)
+                end
+                return head,start,true
+              end
+            end
+          elseif trace_bugs then
+            logwarning("%s: prev node is no char, case %i",cref(dataset,sequence),1)
+          end
+        elseif trace_bugs then
+          logwarning("%s: prev node is no char, case %i",cref(dataset,sequence),2)
+        end
+      elseif trace_bugs then
+        logwarning("%s: mark %s has no anchors",cref(dataset,sequence),gref(markchar))
+      end
+    elseif trace_bugs then
+      logwarning("%s: mark %s is no mark",cref(dataset,sequence),gref(markchar))
+    end
+  end
+  return head,start,false
+end
+function chainprocs.gpos_mark2ligature(head,start,stop,dataset,sequence,currentlookup,rlmode,skiphash,chainindex)
+  local mapping=currentlookup.mapping
+  if mapping==nil then
+    mapping=getmapping(dataset,sequence,currentlookup)
+  end
+  if mapping then
+    local markchar=getchar(start)
+    if marks[markchar] then
+      local markanchors=mapping[markchar] 
+      if markanchors then
+        local base=getprev(start) 
+        if base then
+          local basechar=ischar(base,currentfont)
+          if basechar then
+            if marks[basechar] then
+              while base do
+                base=getprev(base)
+                if base then
+                  local basechar=ischar(base,currentfont)
+                  if basechar then
+                    if not marks[basechar] then
+                      break
+                    end
+                  else
+                    if trace_bugs then
+                      logwarning("%s: no base for mark %s, case %i",cref(dataset,sequence),markchar,1)
+                    end
+                    return head,start,false
+                  end
+                else
+                  if trace_bugs then
+                    logwarning("%s: no base for mark %s, case %i",cref(dataset,sequence),markchar,2)
+                  end
+                  return head,start,false
+                end
+              end
+            end
+            local ba=markanchors[1][basechar]
+            if ba then
+              local ma=markanchors[2]
+              if ma then
+                local index=getligaindex(start)
+                ba=ba[index]
+                if ba then
+                  local dx,dy,bound=setmark(start,base,factor,rlmode,ba,ma,characters[basechar],false,checkmarks)
+                  if trace_marks then
+                    logprocess("%s, bound %s, anchoring mark %s to baselig %s at index %s => (%p,%p)",
+                      cref(dataset,sequence),a or bound,gref(markchar),gref(basechar),index,dx,dy)
+                  end
+                  return head,start,true
+                end
+              end
+            end
+          elseif trace_bugs then
+            logwarning("%s, prev node is no char, case %i",cref(dataset,sequence),1)
+          end
+        elseif trace_bugs then
+          logwarning("%s, prev node is no char, case %i",cref(dataset,sequence),2)
+        end
+      elseif trace_bugs then
+        logwarning("%s, mark %s has no anchors",cref(dataset,sequence),gref(markchar))
+      end
+    elseif trace_bugs then
+      logwarning("%s, mark %s is no mark",cref(dataset,sequence),gref(markchar))
+    end
+  end
+  return head,start,false
+end
+function chainprocs.gpos_mark2mark(head,start,stop,dataset,sequence,currentlookup,rlmode,skiphash,chainindex)
+  local mapping=currentlookup.mapping
+  if mapping==nil then
+    mapping=getmapping(dataset,sequence,currentlookup)
+  end
+  if mapping then
+    local markchar=getchar(start)
+    if marks[markchar] then
+      local markanchors=mapping[markchar] 
+      if markanchors then
+        local base=getprev(start) 
+        local slc=getligaindex(start)
+        if slc then 
+          while base do
+            local blc=getligaindex(base)
+            if blc and blc~=slc then
+              base=getprev(base)
+            else
+              break
+            end
+          end
+        end
+        if base then 
+          local basechar=ischar(base,currentfont)
+          if basechar then
+            local ba=markanchors[1][basechar]
+            if ba then
+              local ma=markanchors[2]
+              if ma then
+                local dx,dy,bound=setmark(start,base,factor,rlmode,ba,ma,characters[basechar],true,checkmarks)
+                if trace_marks then
+                  logprocess("%s, bound %s, anchoring mark %s to basemark %s => (%p,%p)",
+                    cref(dataset,sequence),bound,gref(markchar),gref(basechar),dx,dy)
+                end
+                return head,start,true
+              end
+            end
+          elseif trace_bugs then
+            logwarning("%s: prev node is no mark, case %i",cref(dataset,sequence),1)
+          end
+        elseif trace_bugs then
+          logwarning("%s: prev node is no mark, case %i",cref(dataset,sequence),2)
+        end
+      elseif trace_bugs then
+        logwarning("%s: mark %s has no anchors",cref(dataset,sequence),gref(markchar))
+      end
+    elseif trace_bugs then
+      logwarning("%s: mark %s is no mark",cref(dataset,sequence),gref(markchar))
+    end
+  end
+  return head,start,false
+end
+function chainprocs.gpos_cursive(head,start,stop,dataset,sequence,currentlookup,rlmode,skiphash,chainindex)
+  local mapping=currentlookup.mapping
+  if mapping==nil then
+    mapping=getmapping(dataset,sequence,currentlookup)
+  end
+  if mapping then
+    local startchar=getchar(start)
+    local exitanchors=mapping[startchar] 
+    if exitanchors then
+      if marks[startchar] then
+        if trace_cursive then
+          logprocess("%s: ignoring cursive for mark %s",pref(dataset,sequence),gref(startchar))
+        end
+      else
+        local nxt=getnext(start)
+        while nxt do
+          local nextchar=ischar(nxt,currentfont)
+          if not nextchar then
+            break
+          elseif marks[nextchar] then
+            nxt=getnext(nxt)
+          else
+            local exit=exitanchors[3]
+            if exit then
+              local entry=exitanchors[1][nextchar]
+              if entry then
+                entry=entry[2]
+                if entry then
+                  local r2lflag=sequence.flags[4] 
+                  local dx,dy,bound=setcursive(start,nxt,factor,rlmode,exit,entry,characters[startchar],characters[nextchar],r2lflag)
+                  if trace_cursive then
+                    logprocess("%s: moving %s to %s cursive (%p,%p) using bound %s in %s mode",pref(dataset,sequence),gref(startchar),gref(nextchar),dx,dy,bound,mref(rlmode))
+                  end
+                  return head,start,true
+                end
+              end
+            elseif trace_bugs then
+              onetimemessage(currentfont,startchar,"no entry anchors",report_fonts)
+            end
+            break
+          end
+        end
+      end
+    elseif trace_cursive and trace_details then
+      logprocess("%s, cursive %s is already done",pref(dataset,sequence),gref(getchar(start)),alreadydone)
+    end
+  end
+  return head,start,false
+end
+local function show_skip(dataset,sequence,char,ck,class)
+  logwarning("%s: skipping char %s, class %a, rule %a, lookuptype %a",cref(dataset,sequence),gref(char),class,ck[1],ck[8] or ck[2])
+end
+local userkern=nuts.pool and nuts.pool.newkern 
+do if not userkern then 
+  local thekern=nuts.new("kern",1) 
+  local setkern=nuts.setkern    
+  userkern=function(k)
+    local n=copy_node(thekern)
+    setkern(n,k)
+    return n
+  end
+end end
+local function checked(head)
+  local current=head
+  while current do
+    if getid(current)==glue_code then
+      local kern=userkern(getwidth(current))
+      if head==current then
+        local next=getnext(current)
+        if next then
+          setlink(kern,next)
+        end
+        flush_node(current)
+        head=kern
+        current=next
+      else
+        local prev,next=getboth(current)
+        setlink(prev,kern,next)
+        flush_node(current)
+        current=next
+      end
+    else
+      current=getnext(current)
+    end
+  end
+  return head
+end
+local function setdiscchecked(d,pre,post,replace)
+  if pre   then pre=checked(pre)   end
+  if post  then post=checked(post)  end
+  if replace then replace=checked(replace) end
+  setdisc(d,pre,post,replace)
+end
+local noflags={ false,false,false,false }
+local function chainrun(head,start,last,dataset,sequence,rlmode,skiphash,ck)
+  local size=ck[5]-ck[4]+1
+  local chainlookups=ck[6]
+  local done=false
+  if chainlookups then
+    if size==1 then
+      local chainlookup=chainlookups[1]
+      for j=1,#chainlookup do
+        local chainstep=chainlookup[j]
+        local chainkind=chainstep.type
+        local chainproc=chainprocs[chainkind]
+        if chainproc then
+          local ok
+          head,start,ok=chainproc(head,start,last,dataset,sequence,chainstep,rlmode,skiphash)
+          if ok then
+            done=true
+          end
+        else
+          logprocess("%s: %s is not yet supported (1)",cref(dataset,sequence),chainkind)
+        end
+      end
+     else
+      local i=1
+      local laststart=start
+      local nofchainlookups=#chainlookups 
+      while start do
+        if skiphash then 
+          while start do
+            local char=ischar(start,currentfont)
+            if char then
+              if skiphash and skiphash[char] then
+                start=getnext(start)
+              else
+                break
+              end
+            else
+              break
+            end
+          end
+        end
+        local chainlookup=chainlookups[i]
+        if chainlookup then
+          for j=1,#chainlookup do
+            local chainstep=chainlookup[j]
+            local chainkind=chainstep.type
+            local chainproc=chainprocs[chainkind]
+            if chainproc then
+              local ok,n
+              head,start,ok,n=chainproc(head,start,last,dataset,sequence,chainstep,rlmode,skiphash,i)
+              if ok then
+                done=true
+                if n and n>1 and i+n>nofchainlookups then
+                  i=size 
+                  break
+                end
+              end
+            else
+              logprocess("%s: %s is not yet supported (2)",cref(dataset,sequence),chainkind)
+            end
+          end
+        end
+        i=i+1
+        if i>size or not start then
+          break
+        elseif start then
+          laststart=start
+          start=getnext(start)
+        end
+      end
+      if not start then
+        start=laststart
+      end
+    end
+  else
+    local replacements=ck[7]
+    if replacements then
+      head,start,done=reversesub(head,start,last,dataset,sequence,replacements,rlmode,skiphash)
+    else
+      done=true
+      if trace_contexts then
+        logprocess("%s: skipping match",cref(dataset,sequence))
+      end
+    end
+  end
+  return head,start,done
+end
+local function chaindisk(head,start,dataset,sequence,rlmode,skiphash,ck)
+  if not start then
+    return head,start,false
+  end
+  local startishead=start==head
+  local seq=ck[3]
+  local f=ck[4]
+  local l=ck[5]
+  local s=#seq
+  local done=false
+  local sweepnode=sweepnode
+  local sweeptype=sweeptype
+  local sweepoverflow=false
+  local keepdisc=not sweepnode
+  local lookaheaddisc=nil
+  local backtrackdisc=nil
+  local current=start
+  local last=start
+  local prev=getprev(start)
+  local hasglue=false
+  local i=f
+  while i<=l do
+    local id=getid(current)
+    if id==glyph_code then
+      i=i+1
+      last=current
+      current=getnext(current)
+    elseif id==glue_code then
+      i=i+1
+      last=current
+      current=getnext(current)
+      hasglue=true
+    elseif id==disc_code then
+      if keepdisc then
+        keepdisc=false
+        lookaheaddisc=current
+        local replace=getfield(current,"replace")
+        if not replace then
+          sweepoverflow=true
+          sweepnode=current
+          current=getnext(current)
+        else
+          while replace and i<=l do
+            if getid(replace)==glyph_code then
+              i=i+1
+            end
+            replace=getnext(replace)
+          end
+          current=getnext(replace)
+        end
+        last=current
+      else
+        head,current=flattendisk(head,current)
+      end
+    else
+      last=current
+      current=getnext(current)
+    end
+    if current then
+    elseif sweepoverflow then
+      break
+    elseif sweeptype=="post" or sweeptype=="replace" then
+      current=getnext(sweepnode)
+      if current then
+        sweeptype=nil
+        sweepoverflow=true
+      else
+        break
+      end
+    else
+      break 
+    end
+  end
+  if sweepoverflow then
+    local prev=current and getprev(current)
+    if not current or prev~=sweepnode then
+      local head=getnext(sweepnode)
+      local tail=nil
+      if prev then
+        tail=prev
+        setprev(current,sweepnode)
+      else
+        tail=find_node_tail(head)
+      end
+      setnext(sweepnode,current)
+      setprev(head)
+      setnext(tail)
+      appenddisc(sweepnode,head)
+    end
+  end
+  if l<s then
+    local i=l
+    local t=sweeptype=="post" or sweeptype=="replace"
+    while current and i<s do
+      local id=getid(current)
+      if id==glyph_code then
+        i=i+1
+        current=getnext(current)
+      elseif id==glue_code then
+        i=i+1
+        current=getnext(current)
+        hasglue=true
+      elseif id==disc_code then
+        if keepdisc then
+          keepdisc=false
+          if notmatchpre[current]~=notmatchreplace[current] then
+            lookaheaddisc=current
+          end
+          local replace=getfield(current,"replace")
+          while replace and i<s do
+            if getid(replace)==glyph_code then
+              i=i+1
+            end
+            replace=getnext(replace)
+          end
+          current=getnext(current)
+        elseif notmatchpre[current]~=notmatchreplace[current] then
+          head,current=flattendisk(head,current)
+        else
+          current=getnext(current) 
+        end
+      else
+        current=getnext(current)
+      end
+      if not current and t then
+        current=getnext(sweepnode)
+        if current then
+          sweeptype=nil
+        end
+      end
+    end
+  end
+  if f>1 then
+    local current=prev
+    local i=f
+    local t=sweeptype=="pre" or sweeptype=="replace"
+    if not current and t and current==checkdisk then
+      current=getprev(sweepnode)
+    end
+    while current and i>1 do 
+      local id=getid(current)
+      if id==glyph_code then
+        i=i-1
+      elseif id==glue_code then
+        i=i-1
+        hasglue=true
+      elseif id==disc_code then
+        if keepdisc then
+          keepdisc=false
+          if notmatchpost[current]~=notmatchreplace[current] then
+            backtrackdisc=current
+          end
+          local replace=getfield(current,"replace")
+          while replace and i>1 do
+            if getid(replace)==glyph_code then
+              i=i-1
+            end
+            replace=getnext(replace)
+          end
+        elseif notmatchpost[current]~=notmatchreplace[current] then
+          head,current=flattendisk(head,current)
+        end
+      end
+      current=getprev(current)
+      if t and current==checkdisk then
+        current=getprev(sweepnode)
+      end
+    end
+  end
+  local done=false
+  if lookaheaddisc then
+    local cf=start
+    local cl=getprev(lookaheaddisc)
+    local cprev=getprev(start)
+    local insertedmarks=0
+    while cprev do
+      local char=ischar(cf,currentfont)
+      if char and marks[char] then
+        insertedmarks=insertedmarks+1
+        cf=cprev
+        startishead=cf==head
+        cprev=getprev(cprev)
+      else
+        break
+      end
+    end
+    setlink(cprev,lookaheaddisc)
+    setprev(cf)
+    setnext(cl)
+    if startishead then
+      head=lookaheaddisc
+    end
+    local pre,post,replace=getdisc(lookaheaddisc)
+    local new=copy_node_list(cf)
+    local cnew=new
+    if pre then
+      setlink(find_node_tail(cf),pre)
+    end
+    if replace then
+      local tail=find_node_tail(new)
+      setlink(tail,replace)
+    end
+    for i=1,insertedmarks do
+      cnew=getnext(cnew)
+    end
+    cl=start
+    local clast=cnew
+    for i=f,l do
+      cl=getnext(cl)
+      clast=getnext(clast)
+    end
+    if not notmatchpre[lookaheaddisc] then
+      local ok=false
+      cf,start,ok=chainrun(cf,start,cl,dataset,sequence,rlmode,skiphash,ck)
+      if ok then
+        done=true
+      end
+    end
+    if not notmatchreplace[lookaheaddisc] then
+      local ok=false
+      new,cnew,ok=chainrun(new,cnew,clast,dataset,sequence,rlmode,skiphash,ck)
+      if ok then
+        done=true
+      end
+    end
+    if hasglue then
+      setdiscchecked(lookaheaddisc,cf,post,new)
+    else
+      setdisc(lookaheaddisc,cf,post,new)
+    end
+    start=getprev(lookaheaddisc)
+    sweephead[cf]=getnext(clast) or false
+    sweephead[new]=getnext(cl) or false
+  elseif backtrackdisc then
+    local cf=getnext(backtrackdisc)
+    local cl=start
+    local cnext=getnext(start)
+    local insertedmarks=0
+    while cnext do
+      local char=ischar(cnext,currentfont)
+      if char and marks[char] then
+        insertedmarks=insertedmarks+1
+        cl=cnext
+        cnext=getnext(cnext)
+      else
+        break
+      end
+    end
+    if cnext then
+      setprev(cnext,backtrackdisc)
+    end
+    setnext(backtrackdisc,cnext)
+    setprev(cf)
+    setnext(cl)
+    local pre,post,replace,pretail,posttail,replacetail=getdisc(backtrackdisc,true)
+    local new=copy_node_list(cf)
+    local cnew=find_node_tail(new)
+    for i=1,insertedmarks do
+      cnew=getprev(cnew)
+    end
+    local clast=cnew
+    for i=f,l do
+      clast=getnext(clast)
+    end
+    if not notmatchpost[backtrackdisc] then
+      local ok=false
+      cf,start,ok=chainrun(cf,start,last,dataset,sequence,rlmode,skiphash,ck)
+      if ok then
+        done=true
+      end
+    end
+    if not notmatchreplace[backtrackdisc] then
+      local ok=false
+      new,cnew,ok=chainrun(new,cnew,clast,dataset,sequence,rlmode,skiphash,ck)
+      if ok then
+        done=true
+      end
+    end
+    if post then
+      setlink(posttail,cf)
+    else
+      post=cf
+    end
+    if replace then
+      setlink(replacetail,new)
+    else
+      replace=new
+    end
+    if hasglue then
+      setdiscchecked(backtrackdisc,pre,post,replace)
+    else
+      setdisc(backtrackdisc,pre,post,replace)
+    end
+    start=getprev(backtrackdisc)
+    sweephead[post]=getnext(clast) or false
+    sweephead[replace]=getnext(last) or false
+  else
+    local ok=false
+    head,start,ok=chainrun(head,start,last,dataset,sequence,rlmode,skiphash,ck)
+    if ok then
+      done=true
+    end
+  end
+  return head,start,done
+end
+local function chaintrac(head,start,dataset,sequence,rlmode,skiphash,ck,match)
+  local rule=ck[1]
+  local lookuptype=ck[8] or ck[2]
+  local nofseq=#ck[3]
+  local first=ck[4]
+  local last=ck[5]
+  local char=getchar(start)
+  logwarning("%s: rule %s %s at char %s for (%s,%s,%s) chars, lookuptype %a",
+    cref(dataset,sequence),rule,match and "matches" or "nomatch",
+    gref(char),first-1,last-first+1,nofseq-last,lookuptype)
+end
+local function handle_contextchain(head,start,dataset,sequence,contexts,rlmode,skiphash)
+  local sweepnode=sweepnode
+  local sweeptype=sweeptype
+  local postreplace
+  local prereplace
+  local checkdisc
+  local diskseen 
+  if sweeptype then
+    if sweeptype=="replace" then
+      postreplace=true
+      prereplace=true
+    else
+      postreplace=sweeptype=="post"
+      prereplace=sweeptype=="pre"
+    end
+    checkdisc=getprev(head)
+  end
+  local currentfont=currentfont
+  local skipped  
+  local startprev,
+     startnext=getboth(start)
+  local done   
+  for k=1,contexts.n do 
+    local current=start
+    local last=start
+    local ck=contexts[k]
+    local seq=ck[3]
+    local s=seq.n
+    if s==1 then
+      local char=ischar(current,currentfont)
+      if char and not seq[1][char] then
+        goto next
+      end
+    else
+      local f=ck[4]
+      local l=ck[5]
+      if l>f then
+        local discfound 
+        local n=f+1
+        last=startnext 
+        while n<=l do
+          if postreplace and not last then
+            last=getnext(sweepnode)
+            sweeptype=nil
+          end
+          if last then
+            local char,id=ischar(last,currentfont)
+            if char then
+              if skiphash and skiphash[char] then
+                skipped=true
+                if trace_skips then
+                  show_skip(dataset,sequence,char,ck,classes[char])
+                end
+                last=getnext(last)
+              elseif seq[n][char] then
+                if n<l then
+                  last=getnext(last)
+                end
+                n=n+1
+              elseif discfound then
+                notmatchreplace[discfound]=true
+                if notmatchpre[discfound] then
+                  goto next
+                else
+                  break
+                end
+              else
+                goto next
+              end
+            elseif char==false then
+              if discfound then
+                notmatchreplace[discfound]=true
+                if notmatchpre[discfound] then
+                  goto next
+                else
+                  break
+                end
+              else
+                goto next
+              end
+            elseif id==disc_code then
+              diskseen=true
+              discfound=last
+              notmatchpre[last]=nil
+              notmatchpost[last]=true
+              notmatchreplace[last]=nil
+              local pre,post,replace=getdisc(last)
+              if pre then
+                local n=n
+                while pre do
+                  if seq[n][getchar(pre)] then
+                    n=n+1
+                    if n>l then
+                      break
+                    end
+                    pre=getnext(pre)
+                  else
+                    notmatchpre[last]=true
+                    break
+                  end
+                end
+                if n<=l then
+                  notmatchpre[last]=true
+                end
+              else
+                notmatchpre[last]=true
+              end
+              if replace then
+                while replace do
+                  if seq[n][getchar(replace)] then
+                    n=n+1
+                    if n>l then
+                      break
+                    end
+                    replace=getnext(replace)
+                  else
+                    notmatchreplace[last]=true
+                    if notmatchpre[last] then
+                      goto next
+                    else
+                      break
+                    end
+                  end
+                end
+                if notmatchpre[last] then
+                  goto next
+                end
+              end
+              last=getnext(last)
+            else
+              goto next
+            end
+          else
+            goto next
+          end
+        end
+      end
+      if f>1 then
+        if startprev then
+          local prev=startprev
+          if prereplace and prev==checkdisc then
+            prev=getprev(sweepnode)
+          end
+          if prev then
+            local discfound 
+            local n=f-1
+            while n>=1 do
+              if prev then
+                local char,id=ischar(prev,currentfont)
+                if char then
+                  if skiphash and skiphash[char] then
+                    skipped=true
+                    if trace_skips then
+                      show_skip(dataset,sequence,char,ck,classes[char])
+                    end
+                    prev=getprev(prev)
+                  elseif seq[n][char] then
+                    if n>1 then
+                      prev=getprev(prev)
+                    end
+                    n=n-1
+                  elseif discfound then
+                    notmatchreplace[discfound]=true
+                    if notmatchpost[discfound] then
+                      goto next
+                    else
+                      break
+                    end
+                  else
+                    goto next
+                  end
+                elseif char==false then
+                  if discfound then
+                    notmatchreplace[discfound]=true
+                    if notmatchpost[discfound] then
+                      goto next
+                    end
+                  else
+                    goto next
+                  end
+                  break
+                elseif id==disc_code then
+                  diskseen=true
+                  discfound=prev
+                  notmatchpre[prev]=true
+                  notmatchpost[prev]=nil
+                  notmatchreplace[prev]=nil
+                  local pre,post,replace,pretail,posttail,replacetail=getdisc(prev,true)
+                  if pre~=start and post~=start and replace~=start then
+                    if post then
+                      local n=n
+                      while posttail do
+                        if seq[n][getchar(posttail)] then
+                          n=n-1
+                          if posttail==post or n<1 then
+                            break
+                          else
+                            posttail=getprev(posttail)
+                          end
+                        else
+                          notmatchpost[prev]=true
+                          break
+                        end
+                      end
+                      if n>=1 then
+                        notmatchpost[prev]=true
+                      end
+                    else
+                      notmatchpost[prev]=true
+                    end
+                    if replace then
+                      while replacetail do
+                        if seq[n][getchar(replacetail)] then
+                          n=n-1
+                          if replacetail==replace or n<1 then
+                            break
+                          else
+                            replacetail=getprev(replacetail)
+                          end
+                        else
+                          notmatchreplace[prev]=true
+                          if notmatchpost[prev] then
+                            goto next
+                          else
+                            break
+                          end
+                        end
+                      end
+                    end
+                  end
+                  prev=getprev(prev)
+                elseif id==glue_code then
+                  local sn=seq[n]
+                  if (sn[32] and spaces[prev]) or sn[0xFFFC] then
+                    n=n-1
+                    prev=getprev(prev)
+                  else
+                    goto next
+                  end
+                elseif seq[n][0xFFFC] then
+                  n=n-1
+                  prev=getprev(prev)
+                else
+                  goto next
+                end
+              else
+                goto next
+              end
+            end
+          else
+            goto next
+          end
+        else
+          goto next
+        end
+      end
+      if s>l then
+        local current=last and getnext(last)
+        if not current and postreplace then
+          current=getnext(sweepnode)
+        end
+        if current then
+          local discfound 
+          local n=l+1
+          while n<=s do
+            if current then
+              local char,id=ischar(current,currentfont)
+              if char then
+                if skiphash and skiphash[char] then
+                  skipped=true
+                  if trace_skips then
+                    show_skip(dataset,sequence,char,ck,classes[char])
+                  end
+                  current=getnext(current) 
+                elseif seq[n][char] then
+                  if n<s then 
+                    current=getnext(current) 
+                  end
+                  n=n+1
+                elseif discfound then
+                  notmatchreplace[discfound]=true
+                  if notmatchpre[discfound] then
+                    goto next
+                  else
+                    break
+                  end
+                else
+                  goto next
+                end
+              elseif char==false then
+                if discfound then
+                  notmatchreplace[discfound]=true
+                  if notmatchpre[discfound] then
+                    goto next
+                  else
+                    break
+                  end
+                else
+                  goto next
+                end
+              elseif id==disc_code then
+                diskseen=true
+                discfound=current
+                notmatchpre[current]=nil
+                notmatchpost[current]=true
+                notmatchreplace[current]=nil
+                local pre,post,replace=getdisc(current)
+                if pre then
+                  local n=n
+                  while pre do
+                    if seq[n][getchar(pre)] then
+                      n=n+1
+                      if n>s then
+                        break
+                      else
+                        pre=getnext(pre)
+                      end
+                    else
+                      notmatchpre[current]=true
+                      break
+                    end
+                  end
+                  if n<=s then
+                    notmatchpre[current]=true
+                  end
+                else
+                  notmatchpre[current]=true
+                end
+                if replace then
+                  while replace do
+                    if seq[n][getchar(replace)] then
+                      n=n+1
+                      if n>s then
+                        break
+                      else
+                        replace=getnext(replace)
+                      end
+                    else
+                      notmatchreplace[current]=true
+                      if not notmatchpre[current] then
+                        goto next
+                      else
+                        break
+                      end
+                    end
+                  end
+                else
+                end
+                current=getnext(current)
+              elseif id==glue_code then
+                local sn=seq[n]
+                if (sn[32] and spaces[current]) or sn[0xFFFC] then
+                  n=n+1
+                  current=getnext(current)
+                else
+                  goto next
+                end
+              elseif seq[n][0xFFFC] then
+                n=n+1
+                current=getnext(current)
+              else
+                goto next
+              end
+            else
+              goto next
+            end
+          end
+        else
+          goto next
+        end
+      end
+    end
+    if trace_contexts then
+      chaintrac(head,start,dataset,sequence,rlmode,skipped and skiphash,ck,true)
+    end
+    if diskseen or sweepnode then
+      head,start,done=chaindisk(head,start,dataset,sequence,rlmode,skipped and skiphash,ck)
+    else
+      head,start,done=chainrun(head,start,last,dataset,sequence,rlmode,skipped and skiphash,ck)
+    end
+    if done then
+      break
+    end
+    ::next::
+  end
+  if diskseen then
+    notmatchpre={}
+    notmatchpost={}
+    notmatchreplace={}
+  end
+  return head,start,done
+end
+handlers.gsub_context=handle_contextchain
+handlers.gsub_contextchain=handle_contextchain
+handlers.gsub_reversecontextchain=handle_contextchain
+handlers.gpos_contextchain=handle_contextchain
+handlers.gpos_context=handle_contextchain
+local function chained_contextchain(head,start,stop,dataset,sequence,currentlookup,rlmode,skiphash)
+  local steps=currentlookup.steps
+  local nofsteps=currentlookup.nofsteps
+  if nofsteps>1 then
+    reportmoresteps(dataset,sequence)
+  end
+  return handle_contextchain(head,start,dataset,sequence,currentlookup,rlmode,skiphash)
+end
+chainprocs.gsub_context=chained_contextchain
+chainprocs.gsub_contextchain=chained_contextchain
+chainprocs.gsub_reversecontextchain=chained_contextchain
+chainprocs.gpos_contextchain=chained_contextchain
+chainprocs.gpos_context=chained_contextchain
+local missing=setmetatableindex("table")
+local logwarning=report_process
+local resolved={} 
+local function logprocess(...)
+  if trace_steps then
+    registermessage(...)
+    if trace_steps=="silent" then
+      return
+    end
+  end
+  report_process(...)
+end
+local sequencelists=setmetatableindex(function(t,font)
+  local sequences=fontdata[font].resources.sequences
+  if not sequences or not next(sequences) then
+    sequences=false
+  end
+  t[font]=sequences
+  return sequences
+end)
+do 
+  local autofeatures=fonts.analyzers.features
+  local featuretypes=otf.tables.featuretypes
+  local defaultscript=otf.features.checkeddefaultscript
+  local defaultlanguage=otf.features.checkeddefaultlanguage
+  local wildcard="*"
+  local default="dflt"
+  local function initialize(sequence,script,language,enabled,autoscript,autolanguage)
+    local features=sequence.features
+    if features then
+      local order=sequence.order
+      if order then
+        local featuretype=featuretypes[sequence.type or "unknown"]
+        for i=1,#order do
+          local kind=order[i]
+          local valid=enabled[kind]
+          if valid then
+            local scripts=features[kind]
+            local languages=scripts and (
+              scripts[script] or
+              scripts[wildcard] or
+              (autoscript and defaultscript(featuretype,autoscript,scripts))
+            )
+            local enabled=languages and (
+              languages[language] or
+              languages[wildcard] or
+              (autolanguage and defaultlanguage(featuretype,autolanguage,languages))
+            )
+            if enabled then
+              return { valid,autofeatures[kind] or false,sequence,kind }
+            end
+          end
+        end
+      else
+      end
+    end
+    return false
+  end
+  function otf.dataset(tfmdata,font) 
+    local shared=tfmdata.shared
+    local properties=tfmdata.properties
+    local language=properties.language or "dflt"
+    local script=properties.script  or "dflt"
+    local enabled=shared.features
+    local autoscript=enabled and enabled.autoscript
+    local autolanguage=enabled and enabled.autolanguage
+    local res=resolved[font]
+    if not res then
+      res={}
+      resolved[font]=res
+    end
+    local rs=res[script]
+    if not rs then
+      rs={}
+      res[script]=rs
+    end
+    local rl=rs[language]
+    if not rl then
+      rl={
+      }
+      rs[language]=rl
+      local sequences=tfmdata.resources.sequences
+      if sequences then
+        for s=1,#sequences do
+          local v=enabled and initialize(sequences[s],script,language,enabled,autoscript,autolanguage)
+          if v then
+            rl[#rl+1]=v
+          end
+        end
+      end
+    end
+    return rl
+  end
+end
+local function report_disc(what,n)
+  report_run("%s: %s > %s",what,n,languages.serializediscretionary(n))
+end
+local function kernrun(disc,k_run,font,attr,...)
+  if trace_kernruns then
+    report_disc("kern",disc)
+  end
+  local prev,next=getboth(disc)
+  local nextstart=next
+  local done=false
+  local pre,post,replace,pretail,posttail,replacetail=getdisc(disc,true)
+  local prevmarks=prev
+  while prevmarks do
+    local char=ischar(prevmarks,font)
+    if char and marks[char] then
+      prevmarks=getprev(prevmarks)
+    else
+      break
+    end
+  end
+  if prev and not ischar(prev,font) then 
+    prev=false
+  end
+  if next and not ischar(next,font) then 
+    next=false
+  end
+  if pre then
+    if k_run(pre,"injections",nil,font,attr,...) then
+      done=true
+    end
+    if prev then
+      setlink(prev,pre)
+      if k_run(prevmarks,"preinjections",pre,font,attr,...) then 
+        done=true
+      end
+      setprev(pre)
+      setlink(prev,disc)
+    end
+  end
+  if post then
+    if k_run(post,"injections",nil,font,attr,...) then
+      done=true
+    end
+    if next then
+      setlink(posttail,next)
+      if k_run(posttail,"postinjections",next,font,attr,...) then
+        done=true
+      end
+      setnext(posttail)
+      setlink(disc,next)
+    end
+  end
+  if replace then
+    if k_run(replace,"injections",nil,font,attr,...) then
+      done=true
+    end
+    if prev then
+      setlink(prev,replace)
+      if k_run(prevmarks,"replaceinjections",replace,font,attr,...) then 
+        done=true
+      end
+      setprev(replace)
+      setlink(prev,disc)
+    end
+    if next then
+      setlink(replacetail,next)
+      if k_run(replacetail,"replaceinjections",next,font,attr,...) then
+        done=true
+      end
+      setnext(replacetail)
+      setlink(disc,next)
+    end
+  elseif prev and next then
+    setlink(prev,next)
+    if k_run(prevmarks,"emptyinjections",next,font,attr,...) then
+      done=true
+    end
+    setlink(prev,disc,next)
+  end
+  return nextstart,done
+end
+local function comprun(disc,c_run,...) 
+  if trace_compruns then
+    report_disc("comp",disc)
+  end
+  local pre,post,replace=getdisc(disc)
+  local renewed=false
+  if pre then
+    sweepnode=disc
+    sweeptype="pre" 
+    local new,done=c_run(pre,...)
+    if done then
+      pre=new
+      renewed=true
+    end
+  end
+  if post then
+    sweepnode=disc
+    sweeptype="post"
+    local new,done=c_run(post,...)
+    if done then
+      post=new
+      renewed=true
+    end
+  end
+  if replace then
+    sweepnode=disc
+    sweeptype="replace"
+    local new,done=c_run(replace,...)
+    if done then
+      replace=new
+      renewed=true
+    end
+  end
+  sweepnode=nil
+  sweeptype=nil
+  if renewed then
+    setdisc(disc,pre,post,replace)
+  end
+  return getnext(disc),renewed
+end
+local function testrun(disc,t_run,c_run,...)
+  if trace_testruns then
+    report_disc("test",disc)
+  end
+  local prev,next=getboth(disc)
+  if not next then
+    return
+  end
+  local pre,post,replace,pretail,posttail,replacetail=getdisc(disc,true)
+  local done=false
+  if (post or replace) and prev then
+    if post then
+      setlink(posttail,next)
+    else
+      post=next
+    end
+    if replace then
+      setlink(replacetail,next)
+    else
+      replace=next
+    end
+    local d_post=t_run(post,next,...)
+    local d_replace=t_run(replace,next,...)
+    if d_post>0 or d_replace>0 then
+      local d=d_replace>d_post and d_replace or d_post
+      local head=getnext(disc)
+      local tail=head
+      for i=1,d do
+        tail=getnext(tail)
+        if getid(tail)==disc_code then
+          head,tail=flattendisk(head,tail)
+        end
+      end
+      local next=getnext(tail)
+      setnext(tail)
+      setprev(head)
+      local new=copy_node_list(head)
+      if posttail then
+        setlink(posttail,head)
+      else
+        post=head
+      end
+      if replacetail then
+        setlink(replacetail,new)
+      else
+        replace=new
+      end
+      setlink(disc,next)
+    else
+      if posttail then
+        setnext(posttail)
+      else
+        post=nil
+      end
+      setnext(replacetail)
+      if replacetail then
+        setnext(replacetail)
+      else
+        replace=nil
+      end
+      setprev(next,disc)
+    end
+  end
+  local renewed=false
+  if pre then
+    sweepnode=disc
+    sweeptype="pre"
+    local new,ok=c_run(pre,...)
+    if ok then
+      pre=new
+      renewed=true
+    end
+  end
+  if post then
+    sweepnode=disc
+    sweeptype="post"
+    local new,ok=c_run(post,...)
+    if ok then
+      post=new
+      renewed=true
+    end
+  end
+  if replace then
+    sweepnode=disc
+    sweeptype="replace"
+    local new,ok=c_run(replace,...)
+    if ok then
+      replace=new
+      renewed=true
+    end
+  end
+  sweepnode=nil
+  sweeptype=nil
+  if renewed then
+    setdisc(disc,pre,post,replace)
+    return next,true
+  else
+    return next,done
+  end
+end
+local nesting=0
+local function c_run_single(head,font,attr,lookupcache,step,dataset,sequence,rlmode,skiphash,handler)
+  local done=false
+  local sweep=sweephead[head]
+  if sweep then
+    start=sweep
+    sweephead[head]=false
+  else
+    start=head
+  end
+  while start do
+    local char=ischar(start,font)
+    if char then
+      local a 
+      if attr then
+        a=getattr(start,0)
+      end
+      if not a or (a==attr) then
+        local lookupmatch=lookupcache[char]
+        if lookupmatch then
+          local ok
+          head,start,ok=handler(head,start,dataset,sequence,lookupmatch,rlmode,skiphash,step)
+          if ok then
+            done=true
+          end
+        end
+        if start then
+          start=getnext(start)
+        end
+      else
+        start=getnext(start)
+      end
+    elseif char==false then
+      return head,done
+    elseif sweep then
+      return head,done
+    else
+      start=getnext(start)
+    end
+  end
+  return head,done
+end
+local function t_run_single(start,stop,font,attr,lookupcache)
+  local lastd=nil
+  while start~=stop do
+    local char=ischar(start,font)
+    if char then
+      local a 
+      if attr then
+        a=getattr(start,0)
+      end
+      local startnext=getnext(start)
+      if not a or (a==attr) then
+        local lookupmatch=lookupcache[char]
+        if lookupmatch then
+          local s=startnext
+          local ss=nil
+          local sstop=s==stop
+          if not s then
+            s=ss
+            ss=nil
+          end
+          while getid(s)==disc_code do
+            ss=getnext(s)
+            s=getfield(s,"replace")
+            if not s then
+              s=ss
+              ss=nil
+            end
+          end
+          local l=nil
+          local d=0
+          while s do
+            local lg=lookupmatch[getchar(s)]
+            if lg then
+              if sstop then
+                d=1
+              elseif d>0 then
+                d=d+1
+              end
+              l=lg
+              s=getnext(s)
+              sstop=s==stop
+              if not s then
+                s=ss
+                ss=nil
+              end
+              while getid(s)==disc_code do
+                ss=getnext(s)
+                s=getfield(s,"replace")
+                if not s then
+                  s=ss
+                  ss=nil
+                end
+              end
+            else
+              break
+            end
+          end
+          if l and l.ligature then
+            lastd=d
+          end
+        end
+      else
+      end
+      if lastd then
+        return lastd
+      end
+      start=startnext
+    else
+      break
+    end
+  end
+  return 0
+end
+local function k_run_single(sub,injection,last,font,attr,lookupcache,step,dataset,sequence,rlmode,skiphash,handler)
+  local a 
+  if attr then
+    a=getattr(sub,0)
+  end
+  if not a or (a==attr) then
+    for n in traverse_nodes(sub) do 
+      if n==last then
+        break
+      end
+      local char=ischar(n)
+      if char then
+        local lookupmatch=lookupcache[char]
+        if lookupmatch then
+          local h,d,ok=handler(sub,n,dataset,sequence,lookupmatch,rlmode,skiphash,step,injection)
+          if ok then
+            return true
+          end
+        end
+      end
+    end
+  end
+end
+local function c_run_multiple(head,font,attr,steps,nofsteps,dataset,sequence,rlmode,skiphash,handler)
+  local done=false
+  local sweep=sweephead[head]
+  if sweep then
+    start=sweep
+    sweephead[head]=false
+  else
+    start=head
+  end
+  while start do
+    local char=ischar(start,font)
+    if char then
+      local a 
+      if attr then
+        a=getattr(start,0)
+      end
+      if not a or (a==attr) then
+        for i=1,nofsteps do
+          local step=steps[i]
+          local lookupcache=step.coverage
+          local lookupmatch=lookupcache[char]
+          if lookupmatch then
+            local ok
+            head,start,ok=handler(head,start,dataset,sequence,lookupmatch,rlmode,skiphash,step)
+            if ok then
+              done=true
+              break
+            elseif not start then
+              break
+            end
+          end
+        end
+        if start then
+          start=getnext(start)
+        end
+      else
+        start=getnext(start)
+      end
+    elseif char==false then
+      return head,done
+    elseif sweep then
+      return head,done
+    else
+      start=getnext(start)
+    end
+  end
+  return head,done
+end
+local function t_run_multiple(start,stop,font,attr,steps,nofsteps)
+  local lastd=nil
+  while start~=stop do
+    local char=ischar(start,font)
+    if char then
+      local a 
+      if attr then
+        a=getattr(start,0)
+      end
+      local startnext=getnext(start)
+      if not a or (a==attr) then
+        for i=1,nofsteps do
+          local step=steps[i]
+          local lookupcache=step.coverage
+          local lookupmatch=lookupcache[char]
+          if lookupmatch then
+            local s=startnext
+            local ss=nil
+            local sstop=s==stop
+            if not s then
+              s=ss
+              ss=nil
+            end
+            while getid(s)==disc_code do
+              ss=getnext(s)
+              s=getfield(s,"replace")
+              if not s then
+                s=ss
+                ss=nil
+              end
+            end
+            local l=nil
+            local d=0
+            while s do
+              local lg=lookupmatch[getchar(s)]
+              if lg then
+                if sstop then
+                  d=1
+                elseif d>0 then
+                  d=d+1
+                end
+                l=lg
+                s=getnext(s)
+                sstop=s==stop
+                if not s then
+                  s=ss
+                  ss=nil
+                end
+                while getid(s)==disc_code do
+                  ss=getnext(s)
+                  s=getfield(s,"replace")
+                  if not s then
+                    s=ss
+                    ss=nil
+                  end
+                end
+              else
+                break
+              end
+            end
+            if l and l.ligature then
+              lastd=d
+            end
+          end
+        end
+      else
+      end
+      if lastd then
+        return lastd
+      end
+      start=startnext
+    else
+      break
+    end
+  end
+  return 0
+end
+local function k_run_multiple(sub,injection,last,font,attr,steps,nofsteps,dataset,sequence,rlmode,skiphash,handler)
+  local a 
+  if attr then
+    a=getattr(sub,0)
+  end
+  if not a or (a==attr) then
+    for n in traverse_nodes(sub) do 
+      if n==last then
+        break
+      end
+      local char=ischar(n)
+      if char then
+        for i=1,nofsteps do
+          local step=steps[i]
+          local lookupcache=step.coverage
+          local lookupmatch=lookupcache[char]
+          if lookupmatch then
+            local h,d,ok=handler(sub,n,dataset,sequence,lookupmatch,rlmode,skiphash,step,injection) 
+            if ok then
+              return true
+            end
+          end
+        end
+      end
+    end
+  end
+end
+local function txtdirstate(start,stack,top,rlparmode)
+  local dir=getdir(start)
+  local new=1
+  if dir=="+TRT" then
+    top=top+1
+    stack[top]=dir
+    new=-1
+  elseif dir=="+TLT" then
+    top=top+1
+    stack[top]=dir
+  elseif dir=="-TRT" or dir=="-TLT" then
+    top=top-1
+    if stack[top]=="+TRT" then
+      new=-1
+    end
+  else
+    new=rlparmode
+  end
+  if trace_directions then
+    report_process("directions after txtdir %a: parmode %a, txtmode %a, level %a",dir,mref(rlparmode),mref(new),top)
+  end
+  return getnext(start),top,new
+end
+local function pardirstate(start)
+  local dir=getdir(start)
+  local new=0
+  if dir=="TLT" then
+    new=1
+  elseif dir=="TRT" then
+    new=-1
+  end
+  if trace_directions then
+    report_process("directions after pardir %a: parmode %a",dir,mref(new))
+  end
+  return getnext(start),new,new
+end
+otf.helpers=otf.helpers or {}
+otf.helpers.txtdirstate=txtdirstate
+otf.helpers.pardirstate=pardirstate
+do
+  local fastdisc=true
+  directives.register("otf.fastdisc",function(v) fastdisc=v end)
+  local otfdataset=nil 
+  local getfastdisc={ __index=function(t,k)
+    local v=usesfont(k,currentfont)
+    t[k]=v
+    return v
+  end }
+  local getfastspace={ __index=function(t,k)
+    local v=isspace(k,threshold) or false
+    t[k]=v
+    return v
+  end }
+  function otf.featuresprocessor(head,font,attr,direction,n)
+    local sequences=sequencelists[font] 
+    nesting=nesting+1
+    if nesting==1 then
+      currentfont=font
+      tfmdata=fontdata[font]
+      descriptions=tfmdata.descriptions 
+      characters=tfmdata.characters  
+   local resources=tfmdata.resources
+      marks=resources.marks
+      classes=resources.classes
+      threshold,
+      factor=getthreshold(font)
+      checkmarks=tfmdata.properties.checkmarks
+      if not otfdataset then
+        otfdataset=otf.dataset
+      end
+      discs=fastdisc and n and n>1 and setmetatable({},getfastdisc) 
+      spaces=setmetatable({},getfastspace)
+    elseif currentfont~=font then
+      report_warning("nested call with a different font, level %s, quitting",nesting)
+      nesting=nesting-1
+      return head,false
+    end
+    local head=tonut(head)
+    if trace_steps then
+      checkstep(head)
+    end
+    local initialrl=direction=="TRT" and -1 or 0
+    local done=false
+    local datasets=otfdataset(tfmdata,font,attr)
+    local dirstack={} 
+    sweephead={}
+    for s=1,#datasets do
+      local dataset=datasets[s]
+      local attribute=dataset[2]
+      local sequence=dataset[3] 
+      local rlparmode=initialrl
+      local topstack=0
+      local typ=sequence.type
+      local gpossing=typ=="gpos_single" or typ=="gpos_pair" 
+      local handler=handlers[typ] 
+      local steps=sequence.steps
+      local nofsteps=sequence.nofsteps
+      local skiphash=sequence.skiphash
+      if not steps then
+        local h,ok=handler(head,dataset,sequence,initialrl,font,attr) 
+        if ok then
+          done=true
+        end
+        if h and h~=head then
+          head=h
+        end
+      elseif typ=="gsub_reversecontextchain" then
+        local start=find_node_tail(head)
+        local rlmode=0 
+        local merged=steps.merged
+        while start do
+          local char=ischar(start,font)
+          if char then
+            local m=merged[char]
+            if m then
+              local a 
+              if attr then
+                a=getattr(start,0)
+              end
+              if not a or (a==attr) then
+                for i=m[1],m[2] do
+                  local step=steps[i]
+                  local lookupcache=step.coverage
+                  local lookupmatch=lookupcache[char]
+                  if lookupmatch then
+                    local ok
+                    head,start,ok=handler(head,start,dataset,sequence,lookupmatch,rlmode,skiphash,step)
+                    if ok then
+                      done=true
+                      break
+                    end
+                  end
+                end
+                if start then
+                  start=getprev(start)
+                end
+              else
+                start=getprev(start)
+              end
+            else
+              start=getprev(start)
+            end
+          else
+            start=getprev(start)
+          end
+        end
+      else
+        local start=head
+        local rlmode=initialrl
+        if nofsteps==1 then 
+          local step=steps[1]
+          local lookupcache=step.coverage
+          while start do
+            local char,id=ischar(start,font)
+            if char then
+              if skiphash and skiphash[char] then 
+                start=getnext(start)
+              else
+                local lookupmatch=lookupcache[char]
+                if lookupmatch then
+                  local a 
+                  if attr then
+                    if getattr(start,0)==attr and (not attribute or getprop(start,a_state)==attribute) then
+                      a=true
+                    end
+                  elseif not attribute or getprop(start,a_state)==attribute then
+                    a=true
+                  end
+                  if a then
+                    local ok
+                    head,start,ok=handler(head,start,dataset,sequence,lookupmatch,rlmode,skiphash,step)
+                    if ok then
+                      done=true
+                    end
+                    if start then
+                      start=getnext(start)
+                    end
+                  else
+                    start=getnext(start)
+                  end
+                else
+                  start=getnext(start)
+                end
+              end
+            elseif char==false or id==glue_code then
+              start=getnext(start)
+            elseif id==disc_code then
+              if not discs or discs[start]==true then
+                local ok
+                if gpossing then
+                  start,ok=kernrun(start,k_run_single,font,attr,lookupcache,step,dataset,sequence,rlmode,skiphash,handler)
+                elseif typ=="gsub_ligature" then
+                  start,ok=testrun(start,t_run_single,c_run_single,font,attr,lookupcache,step,dataset,sequence,rlmode,skiphash,handler)
+                else
+                  start,ok=comprun(start,c_run_single,font,attr,lookupcache,step,dataset,sequence,rlmode,skiphash,handler)
+                end
+                if ok then
+                  done=true
+                end
+              else
+                start=getnext(start)
+              end
+            elseif id==math_code then
+              start=getnext(end_of_math(start))
+            elseif id==dir_code then
+              start,topstack,rlmode=txtdirstate(start,dirstack,topstack,rlparmode)
+            elseif id==localpar_code then
+              start,rlparmode,rlmode=pardirstate(start)
+            else
+              start=getnext(start)
+            end
+          end
+        else
+          local merged=steps.merged
+          while start do
+            local char,id=ischar(start,font)
+            if char then
+              if skiphash and skiphash[char] then 
+                start=getnext(start)
+              else
+                local m=merged[char]
+                if m then
+                  local a 
+                  if attr then
+                    if getattr(start,0)==attr and (not attribute or getprop(start,a_state)==attribute) then
+                      a=true
+                    end
+                  elseif not attribute or getprop(start,a_state)==attribute then
+                    a=true
+                  end
+                  if a then
+                    for i=m[1],m[2] do
+                      local step=steps[i]
+                      local lookupcache=step.coverage
+                      local lookupmatch=lookupcache[char]
+                      if lookupmatch then
+                        local ok
+                        head,start,ok=handler(head,start,dataset,sequence,lookupmatch,rlmode,skiphash,step)
+                        if ok then
+                          done=true
+                          break
+                        elseif not start then
+                          break
+                        end
+                      end
+                    end
+                    if start then
+                      start=getnext(start)
+                    end
+                  else
+                    start=getnext(start)
+                  end
+                else
+                  start=getnext(start)
+                end
+              end
+            elseif char==false or id==glue_code then
+              start=getnext(start)
+            elseif id==disc_code then
+              if not discs or discs[start]==true then
+                local ok
+                if gpossing then
+                  start,ok=kernrun(start,k_run_multiple,font,attr,steps,nofsteps,dataset,sequence,rlmode,skiphash,handler)
+                elseif typ=="gsub_ligature" then
+                  start,ok=testrun(start,t_run_multiple,c_run_multiple,font,attr,steps,nofsteps,dataset,sequence,rlmode,skiphash,handler)
+                else
+                  start,ok=comprun(start,c_run_multiple,font,attr,steps,nofsteps,dataset,sequence,rlmode,skiphash,handler)
+                end
+                if ok then
+                  done=true
+                end
+              else
+                start=getnext(start)
+              end
+            elseif id==math_code then
+              start=getnext(end_of_math(start))
+            elseif id==dir_code then
+              start,topstack,rlmode=txtdirstate(start,dirstack,topstack,rlparmode)
+            elseif id==localpar_code then
+              start,rlparmode,rlmode=pardirstate(start)
+            else
+              start=getnext(start)
+            end
+          end
+        end
+      end
+      if trace_steps then 
+        registerstep(head)
+      end
+    end
+    nesting=nesting-1
+    head=tonode(head)
+    return head,done
+  end
+  function otf.datasetpositionprocessor(head,font,direction,dataset)
+    currentfont=font
+    tfmdata=fontdata[font]
+    descriptions=tfmdata.descriptions 
+    characters=tfmdata.characters  
+ local resources=tfmdata.resources
+    marks=resources.marks
+    classes=resources.classes
+    threshold,
+    factor=getthreshold(font)
+    checkmarks=tfmdata.properties.checkmarks
+    if type(dataset)=="number" then
+      dataset=otfdataset(tfmdata,font,0)[dataset]
+    end
+    local sequence=dataset[3] 
+    local typ=sequence.type
+    local handler=handlers[typ] 
+    local steps=sequence.steps
+    local nofsteps=sequence.nofsteps
+    local head=tonut(head)
+    local done=false
+    local dirstack={} 
+    local start=head
+    local initialrl=direction=="TRT" and -1 or 0
+    local rlmode=initialrl
+    local rlparmode=initialrl
+    local topstack=0
+    local merged=steps.merged
+    local position=0
+    while start do
+      local char,id=ischar(start,font)
+      if char then
+        position=position+1
+        local m=merged[char]
+        if m then
+          if skiphash and skiphash[char] then 
+            start=getnext(start)
+          else
+            for i=m[1],m[2] do
+              local step=steps[i]
+              local lookupcache=step.coverage
+              local lookupmatch=lookupcache[char]
+              if lookupmatch then
+                local ok
+                head,start,ok=handler(head,start,dataset,sequence,lookupmatch,rlmode,skiphash,step)
+                if ok then
+                  break
+                elseif not start then
+                  break
+                end
+              end
+            end
+            if start then
+              start=getnext(start)
+            end
+          end
+        else
+          start=getnext(start)
+        end
+      elseif char==false or id==glue_code then
+        start=getnext(start)
+      elseif id==math_code then
+        start=getnext(end_of_math(start))
+      elseif id==dir_code then
+        start,topstack,rlmode=txtdirstate(start,dirstack,topstack,rlparmode)
+      elseif id==localpar_code then
+        start,rlparmode,rlmode=pardirstate(start)
+      else
+        start=getnext(start)
+      end
+    end
+    return tonode(head) 
+  end
+end
+local plugins={}
+otf.plugins=plugins
+function otf.registerplugin(name,f)
+  if type(name)=="string" and type(f)=="function" then
+    plugins[name]={ name,f }
+  end
+end
+function otf.plugininitializer(tfmdata,value)
+  if type(value)=="string" then
+    tfmdata.shared.plugin=plugins[value]
+  end
+end
+function otf.pluginprocessor(head,font,attr,direction) 
+  local s=fontdata[font].shared
+  local p=s and s.plugin
+  if p then
+    if trace_plugins then
+      report_process("applying plugin %a",p[1])
+    end
+    return p[2](head,font,attr,direction)
+  else
+    return head,false
+  end
+end
+function otf.featuresinitializer(tfmdata,value)
+end
+registerotffeature {
+  name="features",
+  description="features",
+  default=true,
+  initializers={
+    position=1,
+    node=otf.featuresinitializer,
+    plug=otf.plugininitializer,
+  },
+  processors={
+    node=otf.featuresprocessor,
+    plug=otf.pluginprocessor,
+  }
+}
+otf.handlers=handlers
+local setspacekerns=nodes.injections.setspacekerns if not setspacekerns then os.exit() end
+local tag="kern" 
+if fontfeatures then
+  function handlers.trigger_space_kerns(head,dataset,sequence,initialrl,font,attr)
+    local features=fontfeatures[font]
+    local enabled=features and features.spacekern and features[tag]
+    if enabled then
+      setspacekerns(font,sequence)
+    end
+    return head,enabled
+  end
+else 
+  function handlers.trigger_space_kerns(head,dataset,sequence,initialrl,font,attr)
+    local shared=fontdata[font].shared
+    local features=shared and shared.features
+    local enabled=features and features.spacekern and features[tag]
+    if enabled then
+      setspacekerns(font,sequence)
+    end
+    return head,enabled
+  end
+end
+local function hasspacekerns(data)
+  local resources=data.resources
+  local sequences=resources.sequences
+  local validgpos=resources.features.gpos
+  if validgpos and sequences then
+    for i=1,#sequences do
+      local sequence=sequences[i]
+      local steps=sequence.steps
+      if steps and sequence.features[tag] then
+        local kind=sequence.type
+        if kind=="gpos_pair" or kind=="gpos_single" then
+          for i=1,#steps do
+            local step=steps[i]
+            local coverage=step.coverage
+            local rules=step.rules
+            if rules then
+            elseif not coverage then
+            elseif kind=="gpos_single" then
+            elseif kind=="gpos_pair" then
+              local format=step.format
+              if format=="move" or format=="kern" then
+                local kerns=coverage[32]
+                if kerns then
+                  return true
+                end
+                for k,v in next,coverage do
+                  if v[32] then
+                    return true
+                  end
+                end
+              elseif format=="pair" then
+                local kerns=coverage[32]
+                if kerns then
+                  for k,v in next,kerns do
+                    local one=v[1]
+                    if one and one~=true then
+                      return true
+                    end
+                  end
+                end
+                for k,v in next,coverage do
+                  local kern=v[32]
+                  if kern then
+                    local one=kern[1]
+                    if one and one~=true then
+                      return true
+                    end
+                  end
+                end
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+  return false
+end
+otf.readers.registerextender {
+  name="spacekerns",
+  action=function(data)
+    data.properties.hasspacekerns=hasspacekerns(data)
+  end
+}
+local function spaceinitializer(tfmdata,value) 
+  local resources=tfmdata.resources
+  local spacekerns=resources and resources.spacekerns
+  if value and spacekerns==nil then
+    local rawdata=tfmdata.shared and tfmdata.shared.rawdata
+    local properties=rawdata.properties
+    if properties and properties.hasspacekerns then
+      local sequences=resources.sequences
+      local validgpos=resources.features.gpos
+      if validgpos and sequences then
+        local left={}
+        local right={}
+        local last=0
+        local feat=nil
+        for i=1,#sequences do
+          local sequence=sequences[i]
+          local steps=sequence.steps
+          if steps then
+            local kern=sequence.features[tag]
+            if kern then
+              local kind=sequence.type
+              if kind=="gpos_pair" or kind=="gpos_single" then
+                if feat then
+                  for script,languages in next,kern do
+                    local f=feat[script]
+                    if f then
+                      for l in next,languages do
+                        f[l]=true
+                      end
+                    else
+                      feat[script]=languages
+                    end
+                  end
+                else
+                  feat=kern
+                end
+                for i=1,#steps do
+                  local step=steps[i]
+                  local coverage=step.coverage
+                  local rules=step.rules
+                  if rules then
+                  elseif not coverage then
+                  elseif kind=="gpos_single" then
+                  elseif kind=="gpos_pair" then
+                    local format=step.format
+                    if format=="move" or format=="kern" then
+                      local kerns=coverage[32]
+                      if kerns then
+                        for k,v in next,kerns do
+                          right[k]=v
+                        end
+                      end
+                      for k,v in next,coverage do
+                        local kern=v[32]
+                        if kern then
+                          left[k]=kern
+                        end
+                      end
+                    elseif format=="pair" then
+                      local kerns=coverage[32]
+                      if kerns then
+                        for k,v in next,kerns do
+                          local one=v[1]
+                          if one and one~=true then
+                            right[k]=one[3]
+                          end
+                        end
+                      end
+                      for k,v in next,coverage do
+                        local kern=v[32]
+                        if kern then
+                          local one=kern[1]
+                          if one and one~=true then
+                            left[k]=one[3]
+                          end
+                        end
+                      end
+                    end
+                  end
+                end
+                last=i
+              end
+            else
+            end
+          end
+        end
+        left=next(left) and left or false
+        right=next(right) and right or false
+        if left or right then
+          spacekerns={
+            left=left,
+            right=right,
+          }
+          if last>0 then
+            local triggersequence={
+              features={ [tag]=feat or { dflt={ dflt=true,} } },
+              flags=noflags,
+              name="trigger_space_kerns",
+              order={ tag },
+              type="trigger_space_kerns",
+              left=left,
+              right=right,
+            }
+            insert(sequences,last,triggersequence)
+          end
+        end
+      end
+    end
+    resources.spacekerns=spacekerns
+  end
+  return spacekerns
+end
+registerotffeature {
+  name="spacekern",
+  description="space kern injection",
+  default=true,
+  initializers={
+    node=spaceinitializer,
+  },
+}
+local function markinitializer(tfmdata,value)
+  local properties=tfmdata.properties
+  properties.checkmarks=value
+end
+registerotffeature {
+  name="checkmarks",
+  description="check mark widths",
+  default=true,
+  initializers={
+    node=markinitializer,
+  },
+}
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-osd']={ 
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Kai Eigner, TAT Zetwerk / Hans Hagen, PRAGMA ADE",
+  copyright="TAT Zetwerk / PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local insert,imerge,copy=table.insert,table.imerge,table.copy
+local next,type=next,type
+local report_devanagari=logs.reporter("otf","devanagari")
+fonts=fonts          or {}
+fonts.analyzers=fonts.analyzers     or {}
+fonts.analyzers.methods=fonts.analyzers.methods or { node={ otf={} } }
+local otf=fonts.handlers.otf
+local handlers=otf.handlers
+local methods=fonts.analyzers.methods
+local otffeatures=fonts.constructors.features.otf
+local registerotffeature=otffeatures.register
+local nuts=nodes.nuts
+local tonode=nuts.tonode
+local tonut=nuts.tonut
+local getnext=nuts.getnext
+local getprev=nuts.getprev
+local getboth=nuts.getboth
+local getid=nuts.getid
+local getchar=nuts.getchar
+local getfont=nuts.getfont
+local getsubtype=nuts.getsubtype
+local setlink=nuts.setlink
+local setnext=nuts.setnext
+local setprev=nuts.setprev
+local setchar=nuts.setchar
+local getprop=nuts.getprop
+local setprop=nuts.setprop
+local ischar=nuts.is_char
+local insert_node_after=nuts.insert_after
+local copy_node=nuts.copy
+local remove_node=nuts.remove
+local flush_list=nuts.flush_list
+local flush_node=nuts.flush_node
+local copyinjection=nodes.injections.copy 
+local unsetvalue=attributes.unsetvalue
+local fontdata=fonts.hashes.identifiers
+local a_state=attributes.private('state')
+local a_syllabe=attributes.private('syllabe')
+local dotted_circle=0x25CC
+local states=fonts.analyzers.states 
+local s_rphf=states.rphf
+local s_half=states.half
+local s_pref=states.pref
+local s_blwf=states.blwf
+local s_pstf=states.pstf
+local replace_all_nbsp=nil
+replace_all_nbsp=function(head) 
+  replace_all_nbsp=typesetters and typesetters.characters and typesetters.characters.replacenbspaces or function(head)
+    return head
+  end
+  return replace_all_nbsp(head)
+end
+local xprocesscharacters=nil
+if context then
+  xprocesscharacters=function(head,font)
+    xprocesscharacters=nodes.handlers.characters
+    return xprocesscharacters(head,font)
+  end
+else
+  xprocesscharacters=function(head,font)
+    xprocesscharacters=nodes.handlers.nodepass 
+    return xprocesscharacters(head,font)
+  end
+end
+local function processcharacters(head,font)
+  return tonut(xprocesscharacters(tonode(head))) 
+end
+local consonant={
+  [0x0915]=true,[0x0916]=true,[0x0917]=true,[0x0918]=true,
+  [0x0919]=true,[0x091A]=true,[0x091B]=true,[0x091C]=true,
+  [0x091D]=true,[0x091E]=true,[0x091F]=true,[0x0920]=true,
+  [0x0921]=true,[0x0922]=true,[0x0923]=true,[0x0924]=true,
+  [0x0925]=true,[0x0926]=true,[0x0927]=true,[0x0928]=true,
+  [0x0929]=true,[0x092A]=true,[0x092B]=true,[0x092C]=true,
+  [0x092D]=true,[0x092E]=true,[0x092F]=true,[0x0930]=true,
+  [0x0931]=true,[0x0932]=true,[0x0933]=true,[0x0934]=true,
+  [0x0935]=true,[0x0936]=true,[0x0937]=true,[0x0938]=true,
+  [0x0939]=true,[0x0958]=true,[0x0959]=true,[0x095A]=true,
+  [0x095B]=true,[0x095C]=true,[0x095D]=true,[0x095E]=true,
+  [0x095F]=true,[0x0979]=true,[0x097A]=true,
+  [0x0C95]=true,[0x0C96]=true,[0x0C97]=true,[0x0C98]=true,
+  [0x0C99]=true,[0x0C9A]=true,[0x0C9B]=true,[0x0C9C]=true,
+  [0x0C9D]=true,[0x0C9E]=true,[0x0C9F]=true,[0x0CA0]=true,
+  [0x0CA1]=true,[0x0CA2]=true,[0x0CA3]=true,[0x0CA4]=true,
+  [0x0CA5]=true,[0x0CA6]=true,[0x0CA7]=true,[0x0CA8]=true,
+  [0x0CA9]=true,[0x0CAA]=true,[0x0CAB]=true,[0x0CAC]=true,
+  [0x0CAD]=true,[0x0CAE]=true,[0x0CAF]=true,[0x0CB0]=true,
+  [0x0CB1]=true,[0x0CB2]=true,[0x0CB3]=true,[0x0CB4]=true,
+  [0x0CB5]=true,[0x0CB6]=true,[0x0CB7]=true,[0x0CB8]=true,
+  [0x0CB9]=true,
+  [0x0CDE]=true,
+  [0x0D15]=true,[0x0D16]=true,[0x0D17]=true,[0x0D18]=true,
+  [0x0D19]=true,[0x0D1A]=true,[0x0D1B]=true,[0x0D1C]=true,
+  [0x0D1D]=true,[0x0D1E]=true,[0x0D1F]=true,[0x0D20]=true,
+  [0x0D21]=true,[0x0D22]=true,[0x0D23]=true,[0x0D24]=true,
+  [0x0D25]=true,[0x0D26]=true,[0x0D27]=true,[0x0D28]=true,
+  [0x0D29]=true,[0x0D2A]=true,[0x0D2B]=true,[0x0D2C]=true,
+  [0x0D2D]=true,[0x0D2E]=true,[0x0D2F]=true,[0x0D30]=true,
+  [0x0D31]=true,[0x0D32]=true,[0x0D33]=true,[0x0D34]=true,
+  [0x0D35]=true,[0x0D36]=true,[0x0D37]=true,[0x0D38]=true,
+  [0x0D39]=true,[0x0D3A]=true,
+}
+local independent_vowel={
+  [0x0904]=true,[0x0905]=true,[0x0906]=true,[0x0907]=true,
+  [0x0908]=true,[0x0909]=true,[0x090A]=true,[0x090B]=true,
+  [0x090C]=true,[0x090D]=true,[0x090E]=true,[0x090F]=true,
+  [0x0910]=true,[0x0911]=true,[0x0912]=true,[0x0913]=true,
+  [0x0914]=true,[0x0960]=true,[0x0961]=true,[0x0972]=true,
+  [0x0973]=true,[0x0974]=true,[0x0975]=true,[0x0976]=true,
+  [0x0977]=true,
+  [0x0C85]=true,[0x0C86]=true,[0x0C87]=true,[0x0C88]=true,
+  [0x0C89]=true,[0x0C8A]=true,[0x0C8B]=true,[0x0C8C]=true,
+  [0x0C8D]=true,[0x0C8E]=true,[0x0C8F]=true,[0x0C90]=true,
+  [0x0C91]=true,[0x0C92]=true,[0x0C93]=true,[0x0C94]=true,
+  [0x0D05]=true,[0x0D06]=true,[0x0D07]=true,[0x0D08]=true,
+  [0x0D09]=true,[0x0D0A]=true,[0x0D0B]=true,[0x0D0C]=true,
+  [0x0D0E]=true,[0x0D0F]=true,[0x0D10]=true,[0x0D12]=true,
+  [0x0D13]=true,[0x0D14]=true,
+}
+local dependent_vowel={
+  [0x093A]=true,[0x093B]=true,[0x093E]=true,[0x093F]=true,
+  [0x0940]=true,[0x0941]=true,[0x0942]=true,[0x0943]=true,
+  [0x0944]=true,[0x0945]=true,[0x0946]=true,[0x0947]=true,
+  [0x0948]=true,[0x0949]=true,[0x094A]=true,[0x094B]=true,
+  [0x094C]=true,[0x094E]=true,[0x094F]=true,[0x0955]=true,
+  [0x0956]=true,[0x0957]=true,[0x0962]=true,[0x0963]=true,
+  [0x0CBE]=true,[0x0CBF]=true,[0x0CC0]=true,[0x0CC1]=true,
+  [0x0CC2]=true,[0x0CC3]=true,[0x0CC4]=true,[0x0CC5]=true,
+  [0x0CC6]=true,[0x0CC7]=true,[0x0CC8]=true,[0x0CC9]=true,
+  [0x0CCA]=true,[0x0CCB]=true,[0x0CCC]=true,
+  [0x0D3E]=true,[0x0D3F]=true,[0x0D40]=true,[0x0D41]=true,
+  [0x0D42]=true,[0x0D43]=true,[0x0D44]=true,[0x0D46]=true,
+  [0x0D47]=true,[0x0D48]=true,[0x0D4A]=true,[0x0D4B]=true,
+  [0x0D4C]=true,[0x0D57]=true,
+}
+local vowel_modifier={
+  [0x0900]=true,[0x0901]=true,[0x0902]=true,[0x0903]=true,
+  [0xA8E0]=true,[0xA8E1]=true,[0xA8E2]=true,[0xA8E3]=true,
+  [0xA8E4]=true,[0xA8E5]=true,[0xA8E6]=true,[0xA8E7]=true,
+  [0xA8E8]=true,[0xA8E9]=true,[0xA8EA]=true,[0xA8EB]=true,
+  [0xA8EC]=true,[0xA8ED]=true,[0xA8EE]=true,[0xA8EF]=true,
+  [0xA8F0]=true,[0xA8F1]=true,
+  [0x0D02]=true,[0x0D03]=true,
+}
+local stress_tone_mark={
+  [0x0951]=true,[0x0952]=true,[0x0953]=true,[0x0954]=true,
+  [0x0CCD]=true,
+  [0x0D4D]=true,
+}
+local nukta={
+  [0x093C]=true,
+  [0x0CBC]=true,
+}
+local halant={
+  [0x094D]=true,
+  [0x0CCD]=true,
+  [0x0D4D]=true,
+}
+local ra={
+  [0x0930]=true,
+  [0x0CB0]=true,
+  [0x0D30]=true,
+}
+local c_anudatta=0x0952 
+local c_nbsp=0x00A0 
+local c_zwnj=0x200C 
+local c_zwj=0x200D 
+local zw_char={ 
+  [0x200C]=true,
+  [0x200D]=true,
+}
+local pre_mark={
+  [0x093F]=true,[0x094E]=true,
+  [0x0D46]=true,[0x0D47]=true,[0x0D48]=true,
+}
+local above_mark={
+  [0x0900]=true,[0x0901]=true,[0x0902]=true,[0x093A]=true,
+  [0x0945]=true,[0x0946]=true,[0x0947]=true,[0x0948]=true,
+  [0x0951]=true,[0x0953]=true,[0x0954]=true,[0x0955]=true,
+  [0xA8E0]=true,[0xA8E1]=true,[0xA8E2]=true,[0xA8E3]=true,
+  [0xA8E4]=true,[0xA8E5]=true,[0xA8E6]=true,[0xA8E7]=true,
+  [0xA8E8]=true,[0xA8E9]=true,[0xA8EA]=true,[0xA8EB]=true,
+  [0xA8EC]=true,[0xA8ED]=true,[0xA8EE]=true,[0xA8EF]=true,
+  [0xA8F0]=true,[0xA8F1]=true,
+  [0x0D4E]=true,
+}
+local below_mark={
+  [0x093C]=true,[0x0941]=true,[0x0942]=true,[0x0943]=true,
+  [0x0944]=true,[0x094D]=true,[0x0952]=true,[0x0956]=true,
+  [0x0957]=true,[0x0962]=true,[0x0963]=true,
+}
+local post_mark={
+  [0x0903]=true,[0x093B]=true,[0x093E]=true,[0x0940]=true,
+  [0x0949]=true,[0x094A]=true,[0x094B]=true,[0x094C]=true,
+  [0x094F]=true,
+}
+local twopart_mark={
+  [0x0D4A]={ 0x0D46,0x0D3E,},	
+  [0x0D4B]={ 0x0D47,0x0D3E,},	
+  [0x0D4C]={ 0x0D46,0x0D57,},	
+}
+local mark_four={} 
+for k,v in next,pre_mark  do mark_four[k]=pre_mark  end
+for k,v in next,above_mark do mark_four[k]=above_mark end
+for k,v in next,below_mark do mark_four[k]=below_mark end
+for k,v in next,post_mark do mark_four[k]=post_mark end
+local mark_above_below_post={}
+for k,v in next,above_mark do mark_above_below_post[k]=above_mark end
+for k,v in next,below_mark do mark_above_below_post[k]=below_mark end
+for k,v in next,post_mark do mark_above_below_post[k]=post_mark end
+local reorder_class={
+  [0x0930]="before postscript",
+  [0x093F]="before half",
+  [0x0940]="after subscript",
+  [0x0941]="after subscript",
+  [0x0942]="after subscript",
+  [0x0943]="after subscript",
+  [0x0944]="after subscript",
+  [0x0945]="after subscript",
+  [0x0946]="after subscript",
+  [0x0947]="after subscript",
+  [0x0948]="after subscript",
+  [0x0949]="after subscript",
+  [0x094A]="after subscript",
+  [0x094B]="after subscript",
+  [0x094C]="after subscript",
+  [0x0962]="after subscript",
+  [0x0963]="after subscript",
+  [0x093E]="after subscript",
+  [0x0CB0]="after postscript",
+  [0x0CBF]="before subscript",
+  [0x0CC6]="before subscript",
+  [0x0CCC]="before subscript",
+  [0x0CBE]="before subscript",
+  [0x0CE2]="before subscript",
+  [0x0CE3]="before subscript",
+  [0x0CC1]="before subscript",
+  [0x0CC2]="before subscript",
+  [0x0CC3]="after subscript",
+  [0x0CC4]="after subscript",
+  [0x0CD5]="after subscript",
+  [0x0CD6]="after subscript",
+}
+local dflt_true={
+  dflt=true
+}
+local dev2_defaults={
+  dev2=dflt_true,
+}
+local deva_defaults={
+  dev2=dflt_true,
+  deva=dflt_true,
+}
+local false_flags={ false,false,false,false }
+local both_joiners_true={
+  [0x200C]=true,
+  [0x200D]=true,
+}
+local sequence_reorder_matras={
+  features={ dv01=dev2_defaults },
+  flags=false_flags,
+  name="dv01_reorder_matras",
+  order={ "dv01" },
+  type="devanagari_reorder_matras",
+  nofsteps=1,
+  steps={
+    {
+      coverage=pre_mark,
+    }
+  }
+}
+local sequence_reorder_reph={
+  features={ dv02=dev2_defaults },
+  flags=false_flags,
+  name="dv02_reorder_reph",
+  order={ "dv02" },
+  type="devanagari_reorder_reph",
+  nofsteps=1,
+  steps={
+    {
+      coverage={},
+    }
+  }
+}
+local sequence_reorder_pre_base_reordering_consonants={
+  features={ dv03=dev2_defaults },
+  flags=false_flags,
+  name="dv03_reorder_pre_base_reordering_consonants",
+  order={ "dv03" },
+  type="devanagari_reorder_pre_base_reordering_consonants",
+  nofsteps=1,
+  steps={
+    {
+      coverage={},
+    }
+  }
+}
+local sequence_remove_joiners={
+  features={ dv04=deva_defaults },
+  flags=false_flags,
+  name="dv04_remove_joiners",
+  order={ "dv04" },
+  type="devanagari_remove_joiners",
+  nofsteps=1,
+  steps={
+    {
+      coverage=both_joiners_true,
+    },
+  }
+}
+local basic_shaping_forms={
+  nukt=true,
+  akhn=true,
+  rphf=true,
+  pref=true,
+  rkrf=true,
+  blwf=true,
+  half=true,
+  pstf=true,
+  vatu=true,
+  cjct=true,
+}
+local valid={
+  akhn=true,
+  rphf=true,
+  pref=true,
+  half=true,
+  blwf=true,
+  pstf=true,
+  pres=true,
+  blws=true,
+  psts=true,
+}
+local function initializedevanagi(tfmdata)
+  local script,language=otf.scriptandlanguage(tfmdata,attr) 
+  if script=="deva" or script=="dev2" or script=="mlym" or script=="mlm2" then
+    local resources=tfmdata.resources
+    local devanagari=resources.devanagari
+    if not devanagari then
+      report_devanagari("adding devanagari features to font")
+      local gsubfeatures=resources.features.gsub
+      local sequences=resources.sequences
+      local sharedfeatures=tfmdata.shared.features
+      local lastmatch=0
+      for s=1,#sequences do 
+        local features=sequences[s].features
+        if features then
+          for k,v in next,features do
+            if basic_shaping_forms[k] then
+              lastmatch=s
+            end
+          end
+        end
+      end
+      local insertindex=lastmatch+1
+      gsubfeatures["dv01"]=dev2_defaults 
+      gsubfeatures["dv02"]=dev2_defaults 
+      gsubfeatures["dv03"]=dev2_defaults 
+      gsubfeatures["dv04"]=deva_defaults
+      local reorder_pre_base_reordering_consonants=copy(sequence_reorder_pre_base_reordering_consonants)
+      local reorder_reph=copy(sequence_reorder_reph)
+      local reorder_matras=copy(sequence_reorder_matras)
+      local remove_joiners=copy(sequence_remove_joiners)
+      insert(sequences,insertindex,reorder_pre_base_reordering_consonants)
+      insert(sequences,insertindex,reorder_reph)
+      insert(sequences,insertindex,reorder_matras)
+      insert(sequences,insertindex,remove_joiners)
+      local blwfcache={}
+      local seqsubset={}
+      local rephstep={
+        coverage={} 
+      }
+      local devanagari={
+        reph=false,
+        vattu=false,
+        blwfcache=blwfcache,
+        seqsubset=seqsubset,
+        reorderreph=rephstep,
+      }
+      reorder_reph.steps={ rephstep }
+      local pre_base_reordering_consonants={}
+      reorder_pre_base_reordering_consonants.steps[1].coverage=pre_base_reordering_consonants
+      resources.devanagari=devanagari
+      for s=1,#sequences do
+        local sequence=sequences[s]
+        local steps=sequence.steps
+        local nofsteps=sequence.nofsteps
+        local features=sequence.features
+        local has_rphf=features.rphf
+        local has_blwf=features.blwf
+        if has_rphf and has_rphf.deva then
+          devanagari.reph=true
+        elseif has_blwf and has_blwf.deva then
+          devanagari.vattu=true
+          for i=1,nofsteps do
+            local step=steps[i]
+            local coverage=step.coverage
+            if coverage then
+              for k,v in next,coverage do
+                if not blwfcache[k] then
+                  blwfcache[k]=v
+                end
+              end
+            end
+          end
+        end
+        for kind,spec in next,features do 
+          if spec.dev2 and valid[kind] then
+            for i=1,nofsteps do
+              local step=steps[i]
+              local coverage=step.coverage
+              if coverage then
+                local reph=false
+                if kind=="rphf" then
+                  for k,v in next,ra do
+                    local r=coverage[k]
+                    if r then
+                      local h=false
+                      for k,v in next,halant do
+                        local h=r[k]
+                        if h then
+                          reph=h.ligature or false
+                          break
+                        end
+                      end
+                      if reph then
+                        break
+                      end
+                    end
+                  end
+                end
+                seqsubset[#seqsubset+1]={ kind,coverage,reph }
+              end
+            end
+          end
+          if kind=="pref" then
+            local steps=sequence.steps
+            local nofsteps=sequence.nofsteps
+            for i=1,nofsteps do
+              local step=steps[i]
+              local coverage=step.coverage
+              if coverage then
+                for k,v in next,halant do
+                  local h=coverage[k]
+                  if h then
+                    local found=false
+                    for k,v in next,h do
+                      found=v and v.ligature
+                      if found then
+                        pre_base_reordering_consonants[k]=found
+                        break
+                      end
+                    end
+                    if found then
+                      break
+                    end
+                  end
+                end
+              end
+            end
+          end
+        end
+      end
+      if script=="deva" then
+        sharedfeatures["dv04"]=true 
+      elseif script=="dev2" then
+        sharedfeatures["dv01"]=true 
+        sharedfeatures["dv02"]=true 
+        sharedfeatures["dv03"]=true 
+        sharedfeatures["dv04"]=true 
+      elseif script=="mlym" then
+        sharedfeatures["pstf"]=true
+      elseif script=="mlm2" then
+        sharedfeatures["pstf"]=true
+        sharedfeatures["pref"]=true
+        sharedfeatures["dv03"]=true 
+        gsubfeatures ["dv03"]=dev2_defaults 
+        insert(sequences,insertindex,sequence_reorder_pre_base_reordering_consonants)
+      end
+    end
+  end
+end
+registerotffeature {
+  name="devanagari",
+  description="inject additional features",
+  default=true,
+  initializers={
+    node=initializedevanagi,
+  },
+}
+local function deva_initialize(font,attr) 
+  local tfmdata=fontdata[font]
+  local datasets=otf.dataset(tfmdata,font,attr) 
+  local devanagaridata=datasets.devanagari
+  if not devanagaridata then
+    devanagaridata={
+      reph=false,
+      vattu=false,
+      blwfcache={},
+    }
+    datasets.devanagari=devanagaridata
+    local resources=tfmdata.resources
+    local devanagari=resources.devanagari
+    for s=1,#datasets do
+      local dataset=datasets[s]
+      if dataset and dataset[1] then 
+        local kind=dataset[4]
+        if kind=="rphf" then
+          devanagaridata.reph=true
+        elseif kind=="blwf" then
+          devanagaridata.vattu=true
+          devanagaridata.blwfcache=devanagari.blwfcache
+        end
+      end
+    end
+  end
+  return devanagaridata.reph,devanagaridata.vattu,devanagaridata.blwfcache
+end
+local function deva_reorder(head,start,stop,font,attr,nbspaces)
+  local reph,vattu,blwfcache=deva_initialize(font,attr) 
+  local current=start
+  local n=getnext(start)
+  local base=nil
+  local firstcons=nil
+  local lastcons=nil
+  local basefound=false
+  if reph and ra[getchar(start)] and halant[getchar(n)] then
+    if n==stop then
+      return head,stop,nbspaces
+    end
+    if getchar(getnext(n))==c_zwj then
+      current=start
+    else
+      current=getnext(n)
+      setprop(start,a_state,s_rphf)
+    end
+  end
+  if getchar(current)==c_nbsp then
+    if current==stop then
+      stop=getprev(stop)
+      head=remove_node(head,current)
+      flush_node(current)
+      return head,stop,nbspaces
+    else
+      nbspaces=nbspaces+1
+      base=current
+      firstcons=current
+      lastcons=current
+      current=getnext(current)
+      if current~=stop then
+        if nukta[getchar(current)] then
+          current=getnext(current)
+        end
+        if getchar(current)==c_zwj then
+          if current~=stop then
+            local next=getnext(current)
+            if next~=stop and halant[getchar(next)] then
+              current=next
+              next=getnext(current)
+              local tmp=next and getnext(next) or nil 
+              local changestop=next==stop
+              local tempcurrent=copy_node(next)
+							copyinjection(tempcurrent,next)
+              local nextcurrent=copy_node(current)
+							copyinjection(nextcurrent,current) 
+              setlink(tempcurrent,nextcurrent)
+              setprop(tempcurrent,a_state,s_blwf)
+              tempcurrent=processcharacters(tempcurrent,font)
+              setprop(tempcurrent,a_state,unsetvalue)
+              if getchar(next)==getchar(tempcurrent) then
+                flush_list(tempcurrent)
+                local n=copy_node(current)
+								copyinjection(n,current) 
+                setchar(current,dotted_circle)
+                head=insert_node_after(head,current,n)
+              else
+                setchar(current,getchar(tempcurrent)) 
+                local freenode=getnext(current)
+                setlink(current,tmp)
+                flush_node(freenode)
+                flush_list(tempcurrent)
+                if changestop then
+                  stop=current
+                end
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+  while not basefound do
+    local char=getchar(current)
+    if consonant[char] then
+      setprop(current,a_state,s_half)
+      if not firstcons then
+        firstcons=current
+      end
+      lastcons=current
+      if not base then
+        base=current
+      elseif blwfcache[char] then
+        setprop(current,a_state,s_blwf)
+      else
+        base=current
+      end
+    end
+    basefound=current==stop
+    current=getnext(current)
+  end
+  if base~=lastcons then
+    local np=base
+    local n=getnext(base)
+    local ch=getchar(n)
+    if nukta[ch] then
+      np=n
+      n=getnext(n)
+      ch=getchar(n)
+    end
+    if halant[ch] then
+      if lastcons~=stop then
+        local ln=getnext(lastcons)
+        if nukta[getchar(ln)] then
+          lastcons=ln
+        end
+      end
+      local nn=getnext(n)
+      local ln=getnext(lastcons) 
+      setlink(np,nn)
+      setnext(lastcons,n)
+      if ln then
+        setprev(ln,n)
+      end
+      setnext(n,ln)
+      setprev(n,lastcons)
+      if lastcons==stop then
+        stop=n
+      end
+    end
+  end
+  n=getnext(start)
+  if n~=stop and ra[getchar(start)] and halant[getchar(n)] and not zw_char[getchar(getnext(n))] then
+    local matra=base
+    if base~=stop then
+      local next=getnext(base)
+      if dependent_vowel[getchar(next)] then
+        matra=next
+      end
+    end
+    local sp=getprev(start)
+    local nn=getnext(n)
+    local mn=getnext(matra)
+    setlink(sp,nn)
+    setlink(matra,start)
+    setlink(n,mn)
+    if head==start then
+      head=nn
+    end
+    start=nn
+    if matra==stop then
+      stop=n
+    end
+  end
+  local current=start
+  while current~=stop do
+    local next=getnext(current)
+    if next~=stop and halant[getchar(next)] and getchar(getnext(next))==c_zwnj then
+      setprop(current,a_state,unsetvalue)
+    end
+    current=next
+  end
+  if base~=stop and getprop(base,a_state) then
+    local next=getnext(base)
+    if halant[getchar(next)] and not (next~=stop and getchar(getnext(next))==c_zwj) then
+      setprop(base,a_state,unsetvalue)
+    end
+  end
+  local current,allreordered,moved=start,false,{ [base]=true }
+  local a,b,p,bn=base,base,base,getnext(base)
+  if base~=stop and nukta[getchar(bn)] then
+    a,b,p=bn,bn,bn
+  end
+  while not allreordered do
+    local c=current
+    local n=getnext(current)
+    local l=nil 
+    if c~=stop then
+      local ch=getchar(n)
+      if nukta[ch] then
+        c=n
+        n=getnext(n)
+        ch=getchar(n)
+      end
+      if c~=stop then
+        if halant[ch] then
+          c=n
+          n=getnext(n)
+          ch=getchar(n)
+        end
+        while c~=stop and dependent_vowel[ch] do
+          c=n
+          n=getnext(n)
+          ch=getchar(n)
+        end
+        if c~=stop then
+          if vowel_modifier[ch] then
+            c=n
+            n=getnext(n)
+            ch=getchar(n)
+          end
+          if c~=stop and stress_tone_mark[ch] then
+            c=n
+            n=getnext(n)
+          end
+        end
+      end
+    end
+    local bp=getprev(firstcons)
+    local cn=getnext(current)
+    local last=getnext(c)
+    while cn~=last do
+      if pre_mark[getchar(cn)] then
+        if bp then
+          setnext(bp,cn)
+        end
+        local prev,next=getboth(cn)
+        if next then
+          setprev(next,prev)
+        end
+        setnext(prev,next)
+        if cn==stop then
+          stop=prev
+        end
+        setprev(cn,bp)
+        setlink(cn,firstcons)
+        if firstcons==start then
+          if head==start then
+            head=cn
+          end
+          start=cn
+        end
+        break
+      end
+      cn=getnext(cn)
+    end
+    allreordered=c==stop
+    current=getnext(c)
+  end
+  if reph or vattu then
+    local current,cns=start,nil
+    while current~=stop do
+      local c=current
+      local n=getnext(current)
+      if ra[getchar(current)] and halant[getchar(n)] then
+        c=n
+        n=getnext(n)
+        local b,bn=base,base
+        while bn~=stop do
+          local next=getnext(bn)
+          if dependent_vowel[getchar(next)] then
+            b=next
+          end
+          bn=next
+        end
+        if getprop(current,a_state)==s_rphf then
+          if b~=current then
+            if current==start then
+              if head==start then
+                head=n
+              end
+              start=n
+            end
+            if b==stop then
+              stop=c
+            end
+            local prev=getprev(current)
+            setlink(prev,n)
+            local next=getnext(b)
+            setlink(c,next)
+            setlink(b,current)
+          end
+        elseif cns and getnext(cns)~=current then
+          local cp=getprev(current)
+          local cnsn=getnext(cns)
+          setlink(cp,n)
+          setlink(cns,current)
+          setlink(c,cnsn)
+          if c==stop then
+            stop=cp
+            break
+          end
+          current=getprev(n)
+        end
+      else
+        local char=getchar(current)
+        if consonant[char] then
+          cns=current
+          local next=getnext(cns)
+          if halant[getchar(next)] then
+            cns=next
+          end
+        elseif char==c_nbsp then
+          nbspaces=nbspaces+1
+          cns=current
+          local next=getnext(cns)
+          if halant[getchar(next)] then
+            cns=next
+          end
+        end
+      end
+      current=getnext(current)
+    end
+  end
+  if getchar(base)==c_nbsp then
+    nbspaces=nbspaces-1
+    head=remove_node(head,base)
+    flush_node(base)
+  end
+  return head,stop,nbspaces
+end
+function handlers.devanagari_reorder_matras(head,start) 
+  local current=start 
+  local startfont=getfont(start)
+  local startattr=getprop(start,a_syllabe)
+  while current do
+    local char=ischar(current,startfont)
+    local next=getnext(current)
+    if char and getprop(current,a_syllabe)==startattr then
+      if halant[char] and not getprop(current,a_state) then
+        if next then
+          local char=ischar(next,startfont)
+          if char and zw_char[char] and getprop(next,a_syllabe)==startattr then
+            current=next
+            next=getnext(current)
+          end
+        end
+        local startnext=getnext(start)
+        head=remove_node(head,start)
+        setlink(start,next)
+        setlink(current,start)
+        start=startnext
+        break
+      end
+    else
+      break
+    end
+    current=next
+  end
+  return head,start,true
+end
+function handlers.devanagari_reorder_reph(head,start)
+  local current=getnext(start)
+  local startnext=nil
+  local startprev=nil
+  local startfont=getfont(start)
+  local startattr=getprop(start,a_syllabe)
+  while current do
+    local char=ischar(current,startfont)
+    if char and getprop(current,a_syllabe)==startattr then 
+      if halant[char] and not getprop(current,a_state) then
+        local next=getnext(current)
+        if next then
+          local nextchar=ischar(next,startfont)
+          if nextchar and zw_char[nextchar] and getprop(next,a_syllabe)==startattr then
+            current=next
+            next=getnext(current)
+          end
+        end
+        startnext=getnext(start)
+        head=remove_node(head,start)
+        setlink(start,next)
+        setlink(current,start)
+        start=startnext
+        startattr=getprop(start,a_syllabe)
+        break
+      end
+      current=getnext(current)
+    else
+      break
+    end
+  end
+  if not startnext then
+    current=getnext(start)
+    while current do
+      local char=ischar(current,startfont)
+      if char and getprop(current,a_syllabe)==startattr then 
+        if getprop(current,a_state)==s_pstf then 
+          startnext=getnext(start)
+          head=remove_node(head,start)
+          setlink(getprev(current),start)
+          setlink(start,current)
+          start=startnext
+          startattr=getprop(start,a_syllabe)
+          break
+        end
+        current=getnext(current)
+      else
+        break
+      end
+    end
+  end
+  if not startnext then
+    current=getnext(start)
+    local c=nil
+    while current do
+      local char=ischar(current,startfont)
+      if char and getprop(current,a_syllabe)==startattr then 
+        if not c and mark_above_below_post[char] and reorder_class[char]~="after subscript" then
+          c=current
+        end
+        current=getnext(current)
+      else
+        break
+      end
+    end
+    if c then
+      startnext=getnext(start)
+      head=remove_node(head,start)
+      setlink(getprev(c),start)
+      setlink(start,c)
+      start=startnext
+      startattr=getprop(start,a_syllabe)
+    end
+  end
+  if not startnext then
+    current=start
+    local next=getnext(current)
+    while next do
+      local nextchar=ischar(next,startfont)
+      if nextchar and getprop(next,a_syllabe)==startattr then 
+        current=next
+        next=getnext(current)
+      else
+        break
+      end
+    end
+    if start~=current then
+      startnext=getnext(start)
+      head=remove_node(head,start)
+      setlink(start,getnext(current))
+      setlink(current,start)
+      start=startnext
+    end
+  end
+  return head,start,true
+end
+function handlers.devanagari_reorder_pre_base_reordering_consonants(head,start)
+  local current=start
+  local startnext=nil
+  local startprev=nil
+  local startfont=getfont(start)
+  local startattr=getprop(start,a_syllabe)
+  while current do
+    local char=ischar(current,startfont)
+    if char and getprop(current,a_syllabe)==startattr then
+      local next=getnext(current)
+      if halant[char] and not getprop(current,a_state) then
+        if next then
+          local nextchar=ischar(next,startfont)
+          if nextchar and getprop(next,a_syllabe)==startattr then
+            if nextchar==c_zwnj or nextchar==c_zwj then
+              current=next
+              next=getnext(current)
+            end
+          end
+        end
+        startnext=getnext(start)
+        removenode(start,start)
+        setlink(start,next)
+        setlink(current,start)
+        start=startnext
+        break
+      end
+      current=next
+    else
+      break
+    end
+  end
+  if not startnext then
+    current=getnext(start)
+    startattr=getprop(start,a_syllabe)
+    while current do
+      local char=ischar(current,startfont)
+      if char and getprop(current,a_syllabe)==startattr then
+        if not consonant[char] and getprop(current,a_state) then 
+          startnext=getnext(start)
+          removenode(start,start)
+          setlink(getprev(current),start)
+          setlink(start,current)
+          start=startnext
+          break
+        end
+        current=getnext(current)
+      else
+        break
+      end
+    end
+  end
+  return head,start,true
+end
+function handlers.devanagari_remove_joiners(head,start,kind,lookupname,replacement)
+  local stop=getnext(start)
+  local font=getfont(start)
+  local last=start
+  while stop do
+    local char=ischar(stop,font)
+    if char and (char==c_zwnj or char==c_zwj) then
+      last=stop
+      stop=getnext(stop)
+    else
+      break
+    end
+  end
+  local prev=getprev(start)
+  if stop then
+    setnext(last)
+    setlink(prev,stop)
+  elseif prev then
+    setnext(prev)
+  end
+  if head==start then
+  	head=stop
+  end
+  flush_list(start)
+  return head,stop,true
+end
+local function dev2_initialize(font,attr)
+  local devanagari=fontdata[font].resources.devanagari
+  if devanagari then
+    return devanagari.seqsubset or {},devanagari.reorderreph or {}
+  else
+    return {},{}
+  end
+end
+local function dev2_reorder(head,start,stop,font,attr,nbspaces) 
+  local seqsubset,reorderreph=dev2_initialize(font,attr)
+  local reph=false 
+  local halfpos=nil
+  local basepos=nil
+  local subpos=nil
+  local postpos=nil
+  local locl={}
+  for i=1,#seqsubset do
+    local subset=seqsubset[i]
+    local kind=subset[1]
+    local lookupcache=subset[2]
+    if kind=="rphf" then
+      reph=subset[3]
+      local current=start
+      local last=getnext(stop)
+      while current~=last do
+        if current~=stop then
+          local c=locl[current] or getchar(current)
+          local found=lookupcache[c]
+          if found then
+            local next=getnext(current)
+            local n=locl[next] or getchar(next)
+            if found[n] then  
+              local afternext=next~=stop and getnext(next)
+              if afternext and zw_char[getchar(afternext)] then 
+                current=next
+                current=getnext(current)
+              elseif current==start then
+                setprop(current,a_state,s_rphf)
+                current=next
+              else
+                current=next
+              end
+            end
+          end
+        end
+        current=getnext(current)
+      end
+    elseif kind=="pref" then
+      local current=start
+      local last=getnext(stop)
+      while current~=last do
+        if current~=stop then
+          local c=locl[current] or getchar(current)
+          local found=lookupcache[c]
+          if found then 
+            local next=getnext(current)
+            local n=locl[next] or getchar(next)
+            if found[n] then
+              setprop(current,a_state,s_pref)
+              setprop(next,a_state,s_pref)
+              current=next
+            end
+          end
+        end
+        current=getnext(current)
+      end
+    elseif kind=="half" then 
+      local current=start
+      local last=getnext(stop)
+      while current~=last do
+        if current~=stop then
+          local c=locl[current] or getchar(current)
+          local found=lookupcache[c]
+          if found then
+            local next=getnext(current)
+            local n=locl[next] or getchar(next)
+            if found[n] then
+              if next~=stop and getchar(getnext(next))==c_zwnj then  
+                current=next
+              else
+                setprop(current,a_state,s_half)
+                if not halfpos then
+                  halfpos=current
+                end
+              end
+              current=getnext(current)
+            end
+          end
+        end
+        current=getnext(current)
+      end
+    elseif kind=="blwf" then 
+      local current=start
+      local last=getnext(stop)
+      while current~=last do
+        if current~=stop then
+          local c=locl[current] or getchar(current)
+          local found=lookupcache[c]
+          if found then
+            local next=getnext(current)
+            local n=locl[next] or getchar(next)
+            if found[n] then
+              setprop(current,a_state,s_blwf)
+              setprop(next,a_state,s_blwf)
+              current=next
+              subpos=current
+            end
+          end
+        end
+        current=getnext(current)
+      end
+    elseif kind=="pstf" then 
+      local current=start
+      local last=getnext(stop)
+      while current~=last do
+        if current~=stop then
+          local c=locl[current] or getchar(current)
+          local found=lookupcache[c]
+          if found then
+            local next=getnext(current)
+            local n=locl[next] or getchar(next)
+            if found[n] then
+              setprop(current,a_state,s_pstf)
+              setprop(next,a_state,s_pstf)
+              current=next
+              postpos=current
+            end
+          end
+        end
+        current=getnext(current)
+      end
+    end
+  end
+  reorderreph.coverage={ [reph]=true }
+  local current,base,firstcons=start,nil,nil
+  if getprop(start,a_state)==s_rphf then
+    current=getnext(getnext(start))
+  end
+  if current~=getnext(stop) and getchar(current)==c_nbsp then
+    if current==stop then
+      stop=getprev(stop)
+      head=remove_node(head,current)
+      flush_node(current)
+      return head,stop,nbspaces
+    else
+      nbspaces=nbspaces+1
+      base=current
+      current=getnext(current)
+      if current~=stop then
+        local char=getchar(current)
+        if nukta[char] then
+          current=getnext(current)
+          char=getchar(current)
+        end
+        if char==c_zwj then
+          local next=getnext(current)
+          if current~=stop and next~=stop and halant[getchar(next)] then
+            current=next
+            next=getnext(current)
+            local tmp=getnext(next)
+            local changestop=next==stop
+            setnext(next)
+            setprop(current,a_state,s_pref)
+            current=processcharacters(current,font)
+            setprop(current,a_state,s_blwf)
+            current=processcharacters(current,font)
+            setprop(current,a_state,s_pstf)
+            current=processcharacters(current,font)
+            setprop(current,a_state,unsetvalue)
+            if halant[getchar(current)] then
+              setnext(getnext(current),tmp)
+              local nc=copy_node(current)
+							copyinjection(nc,current)
+              setchar(current,dotted_circle)
+              head=insert_node_after(head,current,nc)
+            else
+              setnext(current,tmp) 
+              if changestop then
+                stop=current
+              end
+            end
+          end
+        end
+      end
+    end
+  else 
+    local last=getnext(stop)
+    while current~=last do  
+      local next=getnext(current)
+      if consonant[getchar(current)] then
+        if not (current~=stop and next~=stop and halant[getchar(next)] and getchar(getnext(next))==c_zwj) then
+          if not firstcons then
+            firstcons=current
+          end
+          local a=getprop(current,a_state)
+          if not (a==s_pref or a==s_blwf or a==s_pstf) then
+            base=current
+          end
+        end
+      end
+      current=next
+    end
+    if not base then
+      base=firstcons
+    end
+  end
+  if not base then
+    if getprop(start,a_state)==s_rphf then
+      setprop(start,a_state,unsetvalue)
+    end
+    return head,stop,nbspaces
+  else
+    if getprop(base,a_state) then
+      setprop(base,a_state,unsetvalue)
+    end
+    basepos=base
+  end
+  if not halfpos then
+    halfpos=base
+  end
+  if not subpos then
+    subpos=base
+  end
+  if not postpos then
+    postpos=subpos or base
+  end
+  local moved={}
+  local current=start
+  local last=getnext(stop)
+  while current~=last do
+    local char,target,cn=locl[current] or getchar(current),nil,getnext(current)
+    local tpm=twopart_mark[char]
+    if tpm then
+      local extra=copy_node(current)
+      copyinjection(extra,current)
+      char=tpm[1]
+      setchar(current,char)
+      setchar(extra,tpm[2])
+      head=insert_node_after(head,current,extra)
+    end
+    if not moved[current] and dependent_vowel[char] then
+      if pre_mark[char] then      
+        moved[current]=true
+        local prev,next=getboth(current)
+        setlink(prev,next)
+        if current==stop then
+          stop=getprev(current)
+        end
+        if halfpos==start then
+          if head==start then
+            head=current
+          end
+          start=current
+        end
+        setlink(getprev(halfpos),current)
+        setlink(current,halfpos)
+        halfpos=current
+      elseif above_mark[char] then  
+        target=basepos
+        if subpos==basepos then
+          subpos=current
+        end
+        if postpos==basepos then
+          postpos=current
+        end
+        basepos=current
+      elseif below_mark[char] then  
+        target=subpos
+        if postpos==subpos then
+          postpos=current
+        end
+        subpos=current
+      elseif post_mark[char] then  
+        target=postpos
+        postpos=current
+      end
+      if mark_above_below_post[char] then
+        local prev=getprev(current)
+        if prev~=target then
+          local next=getnext(current)
+          setlink(prev,next)
+          if current==stop then
+            stop=prev
+          end
+          setlink(current,getnext(target))
+          setlink(target,current)
+        end
+      end
+    end
+    current=cn
+  end
+  local current,c=start,nil
+  while current~=stop do
+    local char=getchar(current)
+    if halant[char] or stress_tone_mark[char] then
+      if not c then
+        c=current
+      end
+    else
+      c=nil
+    end
+    local next=getnext(current)
+    if c and nukta[getchar(next)] then
+      if head==c then
+        head=next
+      end
+      if stop==next then
+        stop=current
+      end
+      setlink(getprev(c),next)
+      local nextnext=getnext(next)
+      setnext(current,nextnext)
+      local nextnextnext=getnext(nextnext)
+      if nextnextnext then
+        setprev(nextnextnext,current)
+      end
+      setlink(nextnext,c)
+    end
+    if stop==current then break end
+    current=getnext(current)
+  end
+  if getchar(base)==c_nbsp then
+    if base==stop then
+      stop=getprev(stop)
+    end
+    nbspaces=nbspaces-1
+    head=remove_node(head,base)
+    flush_node(base)
+  end
+  return head,stop,nbspaces
+end
+local separator={}
+imerge(separator,consonant)
+imerge(separator,independent_vowel)
+imerge(separator,dependent_vowel)
+imerge(separator,vowel_modifier)
+imerge(separator,stress_tone_mark)
+for k,v in next,nukta do separator[k]=true end
+for k,v in next,halant do separator[k]=true end
+local function analyze_next_chars_one(c,font,variant)
+  local n=getnext(c)
+  if not n then
+    return c
+  end
+  if variant==1 then
+    local v=ischar(n,font)
+    if v and nukta[v] then
+      n=getnext(n)
+      if n then
+        v=ischar(n,font)
+      end
+    end
+    if n and v then
+      local nn=getnext(n)
+      if nn then
+        local vv=ischar(nn,font)
+        if vv then
+          local nnn=getnext(nn)
+          if nnn then
+            local vvv=ischar(nnn,font)
+            if vvv then
+              if vv==c_zwj and consonant[vvv] then
+                c=nnn
+              elseif (vv==c_zwnj or vv==c_zwj) and halant[vvv] then
+                local nnnn=getnext(nnn)
+                if nnnn then
+                  local vvvv=ischar(nnnn,font)
+                  if vvvv and consonant[vvvv] then
+                    c=nnnn
+                  end
+                end
+              end
+            end
+          end
+        end
+      end
+    end
+  elseif variant==2 then
+    local v=ischar(n,font)
+    if v and nukta[v] then
+      c=n
+    end
+    n=getnext(c)
+    if n then
+      v=ischar(n,font)
+      if v then
+        local nn=getnext(n)
+        if nn then
+          local vv=ischar(nn,font)
+          if vv and zw_char[v] then
+            n=nn
+            v=vv
+            nn=getnext(nn)
+            vv=nn and ischar(nn,font)
+          end
+          if vv and halant[v] and consonant[vv] then
+            c=nn
+          end
+        end
+      end
+    end
+  end
+  local n=getnext(c)
+  if not n then
+    return c
+  end
+  local v=ischar(n,font)
+  if not v then
+    return c
+  end
+  if dependent_vowel[v] then
+    c=getnext(c)
+    n=getnext(c)
+    if not n then
+      return c
+    end
+    v=ischar(n,font)
+    if not v then
+      return c
+    end
+  end
+  if nukta[v] then
+    c=getnext(c)
+    n=getnext(c)
+    if not n then
+      return c
+    end
+    v=ischar(n,font)
+    if not v then
+      return c
+    end
+  end
+  if halant[v] then
+    c=getnext(c)
+    n=getnext(c)
+    if not n then
+      return c
+    end
+    v=ischar(n,font)
+    if not v then
+      return c
+    end
+  end
+  if vowel_modifier[v] then
+    c=getnext(c)
+    n=getnext(c)
+    if not n then
+      return c
+    end
+    v=ischar(n,font)
+    if not v then
+      return c
+    end
+  end
+  if stress_tone_mark[v] then
+    c=getnext(c)
+    n=getnext(c)
+    if not n then
+      return c
+    end
+    v=ischar(n,font)
+    if not v then
+      return c
+    end
+  end
+  if stress_tone_mark[v] then
+    return n
+  else
+    return c
+  end
+end
+local function analyze_next_chars_two(c,font)
+  local n=getnext(c)
+  if not n then
+    return c
+  end
+  local v=ischar(n,font)
+  if v and nukta[v] then
+    c=n
+  end
+  n=c
+  while true do
+    local nn=getnext(n)
+    if nn then
+      local vv=ischar(nn,font)
+      if vv then
+        if halant[vv] then
+          n=nn
+          local nnn=getnext(nn)
+          if nnn then
+            local vvv=ischar(nnn,font)
+            if vvv and zw_char[vvv] then
+              n=nnn
+            end
+          end
+        elseif vv==c_zwnj or vv==c_zwj then
+          local nnn=getnext(nn)
+          if nnn then
+            local vvv=ischar(nnn,font)
+            if vvv and halant[vvv] then
+              n=nnn
+            end
+          end
+        else
+          break
+        end
+        local nn=getnext(n)
+        if nn then
+          local vv=ischar(nn,font)
+          if vv and consonant[vv] then
+            n=nn
+            local nnn=getnext(nn)
+            if nnn then
+              local vvv=ischar(nnn,font)
+              if vvv and nukta[vvv] then
+                n=nnn
+              end
+            end
+            c=n
+          else
+            break
+          end
+        else
+          break
+        end
+      else
+        break
+      end
+    else
+      break
+    end
+  end
+  if not c then
+    return
+  end
+  local n=getnext(c)
+  if not n then
+    return c
+  end
+  local v=ischar(n,font)
+  if not v then
+    return c
+  end
+  if v==c_anudatta then
+    c=n
+    n=getnext(c)
+    if not n then
+      return c
+    end
+    v=ischar(n,font)
+    if not v then
+      return c
+    end
+  end
+  if halant[v] then
+    c=n
+    n=getnext(c)
+    if not n then
+      return c
+    end
+    v=ischar(n,font)
+    if not v then
+      return c
+    end
+    if v==c_zwnj or v==c_zwj then
+      c=n
+      n=getnext(c)
+      if not n then
+        return c
+      end
+      v=ischar(n,font)
+      if not v then
+        return c
+      end
+    end
+  else
+    if dependent_vowel[v] then
+      c=n
+      n=getnext(c)
+      if not n then
+        return c
+      end
+      v=ischar(n,font)
+      if not v then
+        return c
+      end
+    end
+    if nukta[v] then
+      c=n
+      n=getnext(c)
+      if not n then
+        return c
+      end
+      v=ischar(n,font)
+      if not v then
+        return c
+      end
+    end
+    if halant[v] then
+      c=n
+      n=getnext(c)
+      if not n then
+        return c
+      end
+      v=ischar(n,font)
+      if not v then
+        return c
+      end
+    end
+  end
+  if vowel_modifier[v] then
+    c=n
+    n=getnext(c)
+    if not n then
+      return c
+    end
+    v=ischar(n,font)
+    if not v then
+      return c
+    end
+  end
+  if stress_tone_mark[v] then
+    c=n
+    n=getnext(c)
+    if not n then
+      return c
+    end
+    v=ischar(n,font)
+    if not v then
+      return c
+    end
+  end
+  if stress_tone_mark[v] then
+    return n
+  else
+    return c
+  end
+end
+local function inject_syntax_error(head,current,mark)
+  local signal=copy_node(current)
+	copyinjection(signal,current)
+  if mark==pre_mark then 
+    setchar(signal,dotted_circle)
+  else
+    setchar(current,dotted_circle)
+  end
+  return insert_node_after(head,current,signal)
+end
+function methods.deva(head,font,attr)
+  head=tonut(head)
+  local current=head
+  local start=true
+  local done=false
+  local nbspaces=0
+  while current do
+		local char=ischar(current,font)
+    if char then
+      done=true
+      local syllablestart=current
+      local syllableend=nil
+      local c=current
+      local n=getnext(c)
+	    local first=char
+      if n and ra[first] then
+        local second=ischar(n,font)
+        if second and halant[second] then
+          local n=getnext(n)
+          if n then
+            local third=ischar(n,font)
+            if third then
+              c=n
+              first=third
+            end
+          end
+        end
+      end
+      local standalone=first==c_nbsp
+      if standalone then
+        local prev=getprev(current)
+        if prev then
+          local prevchar=ischar(prev,font)
+          if not prevchar then
+          elseif not separator[prevchar] then
+          else
+            standalone=false
+          end
+        else
+        end
+      end
+      if standalone then
+				local syllableend=analyze_next_chars_one(c,font,2)
+				current=getnext(syllableend)
+        if syllablestart~=syllableend then
+          head,current,nbspaces=deva_reorder(head,syllablestart,syllableend,font,attr,nbspaces)
+          current=getnext(current)
+        end
+      else
+        if consonant[char] then
+          local prevc=true
+          while prevc do
+            prevc=false
+            local n=getnext(current)
+            if not n then
+              break
+            end
+            local v=ischar(n,font)
+            if not v then
+              break
+            end
+            if nukta[v] then
+              n=getnext(n)
+              if not n then
+                break
+              end
+              v=ischar(n,font)
+              if not v then
+                break
+              end
+            end
+            if halant[v] then
+              n=getnext(n)
+              if not n then
+                break
+              end
+              v=ischar(n,font)
+              if not v then
+                break
+              end
+              if v==c_zwnj or v==c_zwj then
+                n=getnext(n)
+                if not n then
+                  break
+                end
+                v=ischar(n,font)
+                if not v then
+                  break
+                end
+              end
+              if consonant[v] then
+                prevc=true
+                current=n
+              end
+            end
+          end
+          local n=getnext(current)
+          if n then
+            local v=ischar(n,font)
+            if v and nukta[v] then
+              current=n
+              n=getnext(current)
+            end
+          end
+          syllableend=current
+          current=n
+          if current then
+            local v=ischar(current,font)
+            if not v then
+            elseif halant[v] then
+              local n=getnext(current)
+              if n then
+                local v=ischar(n,font)
+                if v and zw_char[v] then
+                  syllableend=n
+                  current=getnext(n)
+                else
+                  syllableend=current
+                  current=n
+                end
+              else
+                syllableend=current
+                current=n
+              end
+            else
+              if dependent_vowel[v] then
+                syllableend=current
+                current=getnext(current)
+                v=ischar(current,font)
+              end
+              if v and vowel_modifier[v] then
+                syllableend=current
+                current=getnext(current)
+                v=ischar(current,font)
+              end
+              if v and stress_tone_mark[v] then
+                syllableend=current
+                current=getnext(current)
+              end
+            end
+          end
+          if syllablestart~=syllableend then
+            head,current,nbspaces=deva_reorder(head,syllablestart,syllableend,font,attr,nbspaces)
+            current=getnext(current)
+          end
+        elseif independent_vowel[char] then
+          syllableend=current
+          current=getnext(current)
+          if current then
+            local v=ischar(current,font)
+            if v then
+              if vowel_modifier[v] then
+                syllableend=current
+                current=getnext(current)
+                v=ischar(current,font)
+              end
+              if v and stress_tone_mark[v] then
+                syllableend=current
+                current=getnext(current)
+              end
+            end
+          end
+        else
+          local mark=mark_four[char]
+          if mark then
+            head,current=inject_syntax_error(head,current,mark)
+          end
+          current=getnext(current)
+        end
+      end
+    else
+      current=getnext(current)
+    end
+    start=false
+  end
+  if nbspaces>0 then
+    head=replace_all_nbsp(head)
+  end
+  head=tonode(head)
+  return head,done
+end
+function methods.dev2(head,font,attr)
+  head=tonut(head)
+  local current=head
+  local start=true
+  local done=false
+  local syllabe=0
+  local nbspaces=0
+  while current do
+    local syllablestart=nil
+    local syllableend=nil
+    local char=ischar(current,font)
+    if char then
+      done=true
+      syllablestart=current
+      local c=current
+      local n=getnext(current)
+      if n and ra[char] then
+        local nextchar=ischar(n,font)
+        if nextchar and halant[nextchar] then
+          local n=getnext(n)
+          if n then
+            local nextnextchar=ischar(n,font)
+            if nextnextchar then
+              c=n
+							char=nextnextchar
+            end
+          end
+        end
+      end
+      if independent_vowel[char] then
+        current=analyze_next_chars_one(c,font,1)
+        syllableend=current
+      else
+        local standalone=char==c_nbsp
+        if standalone then
+          nbspaces=nbspaces+1
+          local p=getprev(current)
+          if not p then
+          elseif ischar(p,font) then
+          elseif not separator[getchar(p)] then
+          else
+            standalone=false
+          end
+        end
+        if standalone then
+          current=analyze_next_chars_one(c,font,2)
+          syllableend=current
+        elseif consonant[getchar(current)] then
+          current=analyze_next_chars_two(current,font) 
+          syllableend=current
+        end
+      end
+    end
+    if syllableend then
+      syllabe=syllabe+1
+      local c=syllablestart
+      local n=getnext(syllableend)
+      while c~=n do
+        setprop(c,a_syllabe,syllabe)
+        c=getnext(c)
+      end
+    end
+    if syllableend and syllablestart~=syllableend then
+      head,current,nbspaces=dev2_reorder(head,syllablestart,syllableend,font,attr,nbspaces)
+    end
+    if not syllableend then
+      local char=ischar(current,font)
+      if char and not getprop(current,a_state) then
+        local mark=mark_four[char]
+        if mark then
+          head,current=inject_syntax_error(head,current,mark)
+        end
+      end
+    end
+    start=false
+    current=getnext(current)
+  end
+  if nbspaces>0 then
+    head=replace_all_nbsp(head)
+  end
+  head=tonode(head)
+  return head,done
+end
+methods.mlym=methods.deva
+methods.mlm2=methods.dev2
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-ocl']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local tostring,tonumber,next=tostring,tonumber,next
+local round,max=math.round,math.round
+local sortedkeys,sortedhash=table.sortedkeys,table.sortedhash
+local setmetatableindex=table.setmetatableindex
+local formatters=string.formatters
+local tounicode=fonts.mappings.tounicode
+local otf=fonts.handlers.otf
+local f_color=formatters["%f %f %f rg"]
+local f_gray=formatters["%f g"]
+if context then
+  local startactualtext=nil
+  local stopactualtext=nil
+  function otf.getactualtext(s)
+    if not startactualtext then
+      startactualtext=backends.codeinjections.startunicodetoactualtextdirect
+      stopactualtext=backends.codeinjections.stopunicodetoactualtextdirect
+    end
+    return startactualtext(s),stopactualtext()
+  end
+else
+  local tounicode=fonts.mappings.tounicode16
+  function otf.getactualtext(s)
+    return
+      "/Span << /ActualText <feff"..s.."> >> BDC",
+      "EMC"
+  end
+end
+local sharedpalettes={}
+local hash=setmetatableindex(function(t,k)
+  local v={ "pdf","direct",k }
+  t[k]=v
+  return v
+end)
+if context then
+  local colors=attributes.list[attributes.private('color')] or {}
+  local transparencies=attributes.list[attributes.private('transparency')] or {}
+  function otf.registerpalette(name,values)
+    sharedpalettes[name]=values
+    for i=1,#values do
+      local v=values[i]
+      local c=nil
+      local t=nil
+      if type(v)=="table" then
+        c=colors.register(name,"rgb",
+          max(round((v.r or 0)*255),255)/255,
+          max(round((v.g or 0)*255),255)/255,
+          max(round((v.b or 0)*255),255)/255
+        )
+      else
+        c=colors[v]
+        t=transparencies[v]
+      end
+      if c and t then
+        values[i]=hash[lpdf.color(1,c).." "..lpdf.transparency(t)]
+      elseif c then
+        values[i]=hash[lpdf.color(1,c)]
+      elseif t then
+        values[i]=hash[lpdf.color(1,t)]
+      end
+    end
+  end
+else 
+  function otf.registerpalette(name,values)
+    sharedpalettes[name]=values
+    for i=1,#values do
+      local v=values[i]
+      values[i]=hash[f_color(
+        max(round((v.r or 0)*255),255)/255,
+        max(round((v.g or 0)*255),255)/255,
+        max(round((v.b or 0)*255),255)/255
+      )]
+    end
+  end
+end
+local function convert(t,k)
+  local v={}
+  for i=1,#k do
+    local p=k[i]
+    local r,g,b=p[1],p[2],p[3]
+    if r==g and g==b then
+      v[i]=hash[f_gray(r/255)]
+    else
+      v[i]=hash[f_color(r/255,g/255,b/255)]
+    end
+  end
+  t[k]=v
+  return v
+end
+local start={ "pdf","page","q" }
+local stop={ "pdf","raw","Q" }
+local function initializecolr(tfmdata,kind,value) 
+  if value then
+    local resources=tfmdata.resources
+    local palettes=resources.colorpalettes
+    if palettes then
+      local converted=resources.converted
+      if not converted then
+        converted=setmetatableindex(convert)
+        resources.converted=converted
+      end
+      local colorvalues=sharedpalettes[value] or converted[palettes[tonumber(value) or 1] or palettes[1]] or {}
+      local classes=#colorvalues
+      if classes==0 then
+        return
+      end
+      local characters=tfmdata.characters
+      local descriptions=tfmdata.descriptions
+      local properties=tfmdata.properties
+      properties.virtualized=true
+      tfmdata.fonts={
+        { id=0 }
+      }
+      local widths=setmetatableindex(function(t,k)
+        local v={ "right",-k }
+        t[k]=v
+        return v
+      end)
+      local getactualtext=otf.getactualtext
+      local default=colorvalues[#colorvalues]
+      local b,e=getactualtext(tounicode(0xFFFD))
+      local actualb={ "pdf","page",b } 
+      local actuale={ "pdf","page",e }
+      local cache=setmetatableindex(function(t,k)
+        local v={ "char",k } 
+        t[k]=v
+        return v
+      end)
+      for unicode,character in next,characters do
+        local description=descriptions[unicode]
+        if description then
+          local colorlist=description.colors
+          if colorlist then
+            local u=description.unicode or characters[unicode].unicode
+            local w=character.width or 0
+            local s=#colorlist
+            local goback=w~=0 and widths[w] or nil 
+            local t={
+              start,
+              not u and actualb or { "pdf","raw",getactualtext(tounicode(u)) }
+            }
+            local n=2
+            local l=nil
+            for i=1,s do
+              local entry=colorlist[i]
+              local v=colorvalues[entry.class] or default
+              if v and l~=v then
+                n=n+1 t[n]=v
+                l=v
+              end
+              n=n+1 t[n]=cache[entry.slot]
+              if s>1 and i<s and goback then
+                n=n+1 t[n]=goback
+              end
+            end
+            n=n+1 t[n]=actuale
+            n=n+1 t[n]=stop
+            character.commands=t
+          end
+        end
+      end
+    end
+  end
+end
+fonts.handlers.otf.features.register {
+  name="colr",
+  description="color glyphs",
+  manipulators={
+    base=initializecolr,
+    node=initializecolr,
+  }
+}
+do
+  local nofstreams=0
+  local f_name=formatters[ [[pdf-glyph-%05i]] ]
+  local f_used=context and formatters[ [[original:///%s]] ] or formatters[ [[%s]] ]
+  local hashed={}
+  local cache={}
+  function otf.storepdfdata(pdf)
+    local done=hashed[pdf]
+    if not done then
+      nofstreams=nofstreams+1
+      local o,n=epdf.openMemStream(pdf,#pdf,f_name(nofstreams))
+      cache[n]=o 
+      done=f_used(n)
+      hashed[pdf]=done
+    end
+    return nil,done,nil
+  end
+end
+local function pdftovirtual(tfmdata,pdfshapes,kind) 
+  if not tfmdata or not pdfshapes or not kind then
+    return
+  end
+  local characters=tfmdata.characters
+  local properties=tfmdata.properties
+  local parameters=tfmdata.parameters
+  local hfactor=parameters.hfactor
+  properties.virtualized=true
+  tfmdata.fonts={
+    { id=0 }
+  }
+  local getactualtext=otf.getactualtext
+  local storepdfdata=otf.storepdfdata
+  for unicode,character in sortedhash(characters) do 
+    local index=character.index
+    if index then
+      local pdf=pdfshapes[index]
+      local typ=type(pdf)
+      local data=nil
+      local dx=nil
+      local dy=nil
+      if typ=="table" then
+        data=pdf.data
+        dx=pdf.dx or 0
+        dy=pdf.dy or 0
+      elseif typ=="string" then
+        data=pdf
+        dx=0
+        dy=0
+      end
+      if data then
+        local setcode,name,nilcode=storepdfdata(data)
+        if name then
+          local bt,et=getactualtext(unicode)
+          local wd=character.width or 0
+          local ht=character.height or 0
+          local dp=character.depth or 0
+          character.commands={
+            { "pdf","direct",bt },
+            { "down",dp+dy*hfactor },
+            { "right",dx*hfactor },
+            { "image",{ filename=name,width=wd,height=ht,depth=dp } },
+            { "pdf","direct",et },
+          }
+          character[kind]=true
+        end
+      end
+    end
+  end
+end
+local otfsvg=otf.svg or {}
+otf.svg=otfsvg
+otf.svgenabled=true
+do
+  local report_svg=logs.reporter("fonts","svg conversion")
+  local loaddata=io.loaddata
+  local savedata=io.savedata
+  local remove=os.remove
+  if context and xml.convert then
+    local xmlconvert=xml.convert
+    local xmlfirst=xml.first
+    function otfsvg.filterglyph(entry,index)
+      local svg=xmlconvert(entry.data)
+      local root=svg and xmlfirst(svg,"/svg[@id='glyph"..index.."']")
+      local data=root and tostring(root)
+      return data
+    end
+  else
+    function otfsvg.filterglyph(entry,index) 
+      return entry.data
+    end
+  end
+  local runner=sandbox and sandbox.registerrunner {
+    name="otfsvg",
+    program="inkscape",
+    method="pipeto",
+    template="--shell > temp-otf-svg-shape.log",
+    reporter=report_svg,
+  }
+  if not runner then
+    runner=function()
+      return io.open("inkscape --shell > temp-otf-svg-shape.log","w")
+    end
+  end
+  function otfsvg.topdf(svgshapes)
+    local pdfshapes={}
+    local inkscape=runner()
+    if inkscape then
+      local nofshapes=#svgshapes
+      local f_svgfile=formatters["temp-otf-svg-shape-%i.svg"]
+      local f_pdffile=formatters["temp-otf-svg-shape-%i.pdf"]
+      local f_convert=formatters["%s --export-pdf=%s\n"]
+      local filterglyph=otfsvg.filterglyph
+      local nofdone=0
+      report_svg("processing %i svg containers",nofshapes)
+      statistics.starttiming()
+      for i=1,nofshapes do
+        local entry=svgshapes[i]
+        for index=entry.first,entry.last do
+          local data=filterglyph(entry,index)
+          if data and data~="" then
+            local svgfile=f_svgfile(index)
+            local pdffile=f_pdffile(index)
+            savedata(svgfile,data)
+            inkscape:write(f_convert(svgfile,pdffile))
+            pdfshapes[index]=true
+            nofdone=nofdone+1
+            if nofdone%100==0 then
+              report_svg("%i shapes processed",nofdone)
+            end
+          end
+        end
+      end
+      inkscape:write("quit\n")
+      inkscape:close()
+      report_svg("processing %i pdf results",nofshapes)
+      for index in next,pdfshapes do
+        local svgfile=f_svgfile(index)
+        local pdffile=f_pdffile(index)
+        pdfshapes[index]=loaddata(pdffile)
+        remove(svgfile)
+        remove(pdffile)
+      end
+      statistics.stoptiming()
+      if statistics.elapsedseconds then
+        report_svg("svg conversion time %s",statistics.elapsedseconds() or "-")
+      end
+    end
+    return pdfshapes
+  end
+end
+local function initializesvg(tfmdata,kind,value) 
+  if value and otf.svgenabled then
+    local svg=tfmdata.properties.svg
+    local hash=svg and svg.hash
+    local timestamp=svg and svg.timestamp
+    if not hash then
+      return
+    end
+    local pdffile=containers.read(otf.pdfcache,hash)
+    local pdfshapes=pdffile and pdffile.pdfshapes
+    if not pdfshapes or pdffile.timestamp~=timestamp then
+      local svgfile=containers.read(otf.svgcache,hash)
+      local svgshapes=svgfile and svgfile.svgshapes
+      pdfshapes=svgshapes and otfsvg.topdf(svgshapes) or {}
+      containers.write(otf.pdfcache,hash,{
+        pdfshapes=pdfshapes,
+        timestamp=timestamp,
+      })
+    end
+    pdftovirtual(tfmdata,pdfshapes,"svg")
+  end
+end
+fonts.handlers.otf.features.register {
+  name="svg",
+  description="svg glyphs",
+  manipulators={
+    base=initializesvg,
+    node=initializesvg,
+  }
+}
+local otfsbix=otf.sbix or {}
+otf.sbix=otfsbix
+otf.sbixenabled=true
+do
+  local report_sbix=logs.reporter("fonts","sbix conversion")
+  local loaddata=io.loaddata
+  local savedata=io.savedata
+  local remove=os.remove
+  local runner=sandbox and sandbox.registerrunner {
+    name="otfsbix",
+    program="gm",
+    template="convert -quality 100 temp-otf-sbix-shape.sbix temp-otf-sbix-shape.pdf > temp-otf-svg-shape.log",
+  }
+  if not runner then
+    runner=function()
+      return os.execute("gm convert -quality 100 temp-otf-sbix-shape.sbix temp-otf-sbix-shape.pdf > temp-otf-svg-shape.log")
+    end
+  end
+  function otfsbix.topdf(sbixshapes)
+    local pdfshapes={}
+    local sbixfile="temp-otf-sbix-shape.sbix"
+    local pdffile="temp-otf-sbix-shape.pdf"
+    local nofdone=0
+    local indices=sortedkeys(sbixshapes) 
+    local nofindices=#indices
+    report_sbix("processing %i sbix containers",nofindices)
+    statistics.starttiming()
+    for i=1,nofindices do
+      local index=indices[i]
+      local entry=sbixshapes[index]
+      local data=entry.data
+      local x=entry.x
+      local y=entry.y
+      savedata(sbixfile,data)
+      runner()
+      pdfshapes[index]={
+        x=x~=0 and x or nil,
+        y=y~=0 and y or nil,
+        data=loaddata(pdffile),
+      }
+      nofdone=nofdone+1
+      if nofdone%100==0 then
+        report_sbix("%i shapes processed",nofdone)
+      end
+    end
+    report_sbix("processing %i pdf results",nofindices)
+    remove(sbixfile)
+    remove(pdffile)
+    statistics.stoptiming()
+    if statistics.elapsedseconds then
+      report_sbix("sbix conversion time %s",statistics.elapsedseconds() or "-")
+    end
+    return pdfshapes
+  end
+end
+local function initializesbix(tfmdata,kind,value) 
+  if value and otf.sbixenabled then
+    local sbix=tfmdata.properties.sbix
+    local hash=sbix and sbix.hash
+    local timestamp=sbix and sbix.timestamp
+    if not hash then
+      return
+    end
+    local pdffile=containers.read(otf.pdfcache,hash)
+    local pdfshapes=pdffile and pdffile.pdfshapes
+    if not pdfshapes or pdffile.timestamp~=timestamp then
+      local sbixfile=containers.read(otf.sbixcache,hash)
+      local sbixshapes=sbixfile and sbixfile.sbixshapes
+      pdfshapes=sbixshapes and otfsbix.topdf(sbixshapes) or {}
+      containers.write(otf.pdfcache,hash,{
+        pdfshapes=pdfshapes,
+        timestamp=timestamp,
+      })
+    end
+    pdftovirtual(tfmdata,pdfshapes,"sbix")
+  end
+end
+fonts.handlers.otf.features.register {
+  name="sbix",
+  description="sbix glyphs",
+  manipulators={
+    base=initializesbix,
+    node=initializesbix,
+  }
+}
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-otc']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local format,insert,sortedkeys,tohash=string.format,table.insert,table.sortedkeys,table.tohash
+local type,next=type,next
+local lpegmatch=lpeg.match
+local utfbyte,utflen,utfsplit=utf.byte,utf.len,utf.split
+local trace_loading=false trackers.register("otf.loading",function(v) trace_loading=v end)
+local report_otf=logs.reporter("fonts","otf loading")
+local fonts=fonts
+local otf=fonts.handlers.otf
+local registerotffeature=otf.features.register
+local setmetatableindex=table.setmetatableindex
+local checkmerge=fonts.helpers.checkmerge
+local checkflags=fonts.helpers.checkflags
+local checksteps=fonts.helpers.checksteps
+local normalized={
+  substitution="substitution",
+  single="substitution",
+  ligature="ligature",
+  alternate="alternate",
+  multiple="multiple",
+  kern="kern",
+  pair="pair",
+  single="single",
+  chainsubstitution="chainsubstitution",
+  chainposition="chainposition",
+}
+local types={
+  substitution="gsub_single",
+  ligature="gsub_ligature",
+  alternate="gsub_alternate",
+  multiple="gsub_multiple",
+  kern="gpos_pair",
+  pair="gpos_pair",
+  single="gpos_single",
+  chainsubstitution="gsub_contextchain",
+  chainposition="gpos_contextchain",
+}
+local names={
+  gsub_single="gsub",
+  gsub_multiple="gsub",
+  gsub_alternate="gsub",
+  gsub_ligature="gsub",
+  gsub_context="gsub",
+  gsub_contextchain="gsub",
+  gsub_reversecontextchain="gsub",
+  gpos_single="gpos",
+  gpos_pair="gpos",
+  gpos_cursive="gpos",
+  gpos_mark2base="gpos",
+  gpos_mark2ligature="gpos",
+  gpos_mark2mark="gpos",
+  gpos_context="gpos",
+  gpos_contextchain="gpos",
+}
+setmetatableindex(types,function(t,k) t[k]=k return k end) 
+local everywhere={ ["*"]={ ["*"]=true } } 
+local noflags={ false,false,false,false }
+local function getrange(sequences,category)
+  local count=#sequences
+  local first=nil
+  local last=nil
+  for i=1,count do
+    local t=sequences[i].type
+    if t and names[t]==category then
+      if not first then
+        first=i
+      end
+      last=i
+    end
+  end
+  return first or 1,last or count
+end
+local function validspecification(specification,name)
+  local dataset=specification.dataset
+  if dataset then
+  elseif specification[1] then
+    dataset=specification
+    specification={ dataset=dataset }
+  else
+    dataset={ { data=specification.data } }
+    specification.data=nil
+    specification.dataset=dataset
+  end
+  local first=dataset[1]
+  if first then
+    first=first.data
+  end
+  if not first then
+    report_otf("invalid feature specification, no dataset")
+    return
+  end
+  if type(name)~="string" then
+    name=specification.name or first.name
+  end
+  if type(name)~="string" then
+    report_otf("invalid feature specification, no name")
+    return
+  end
+  local n=#dataset
+  if n>0 then
+    for i=1,n do
+      setmetatableindex(dataset[i],specification)
+    end
+    return specification,name
+  end
+end
+local function addfeature(data,feature,specifications)
+  if not specifications then
+    report_otf("missing specification")
+    return
+  end
+  local descriptions=data.descriptions
+  local resources=data.resources
+  local features=resources.features
+  local sequences=resources.sequences
+  if not features or not sequences then
+    report_otf("missing specification")
+    return
+  end
+  local alreadydone=resources.alreadydone
+  if not alreadydone then
+    alreadydone={}
+    resources.alreadydone=alreadydone
+  end
+  if alreadydone[specifications] then
+    return
+  else
+    alreadydone[specifications]=true
+  end
+  local fontfeatures=resources.features or everywhere
+  local unicodes=resources.unicodes
+  local splitter=lpeg.splitter(" ",unicodes)
+  local done=0
+  local skip=0
+  local aglunicodes=false
+  local specifications=validspecification(specifications,feature)
+  if not specifications then
+    return
+  end
+  local function tounicode(code)
+    if not code then
+      return
+    end
+    if type(code)=="number" then
+      return code
+    end
+    local u=unicodes[code]
+    if u then
+      return u
+    end
+    if utflen(code)==1 then
+      u=utfbyte(code)
+      if u then
+        return u
+      end
+    end
+    if not aglunicodes then
+      aglunicodes=fonts.encodings.agl.unicodes 
+    end
+    return aglunicodes[code]
+  end
+  local coverup=otf.coverup
+  local coveractions=coverup.actions
+  local stepkey=coverup.stepkey
+  local register=coverup.register
+  local function prepare_substitution(list,featuretype,nocheck)
+    local coverage={}
+    local cover=coveractions[featuretype]
+    for code,replacement in next,list do
+      local unicode=tounicode(code)
+      local description=descriptions[unicode]
+      if not nocheck and not description then
+        skip=skip+1
+      else
+        if type(replacement)=="table" then
+          replacement=replacement[1]
+        end
+        replacement=tounicode(replacement)
+        if replacement and descriptions[replacement] then
+          cover(coverage,unicode,replacement)
+          done=done+1
+        else
+          skip=skip+1
+        end
+      end
+    end
+    return coverage
+  end
+  local function prepare_alternate(list,featuretype,nocheck)
+    local coverage={}
+    local cover=coveractions[featuretype]
+    for code,replacement in next,list do
+      local unicode=tounicode(code)
+      local description=descriptions[unicode]
+      if not nocheck and not description then
+        skip=skip+1
+      elseif type(replacement)=="table" then
+        local r={}
+        for i=1,#replacement do
+          local u=tounicode(replacement[i])
+          r[i]=(nocheck or descriptions[u]) and u or unicode
+        end
+        cover(coverage,unicode,r)
+        done=done+1
+      else
+        local u=tounicode(replacement)
+        if u then
+          cover(coverage,unicode,{ u })
+          done=done+1
+        else
+          skip=skip+1
+        end
+      end
+    end
+    return coverage
+  end
+  local function prepare_multiple(list,featuretype,nocheck)
+    local coverage={}
+    local cover=coveractions[featuretype]
+    for code,replacement in next,list do
+      local unicode=tounicode(code)
+      local description=descriptions[unicode]
+      if not nocheck and not description then
+        skip=skip+1
+      elseif type(replacement)=="table" then
+        local r,n={},0
+        for i=1,#replacement do
+          local u=tounicode(replacement[i])
+          if nocheck or descriptions[u] then
+            n=n+1
+            r[n]=u
+          end
+        end
+        if n>0 then
+          cover(coverage,unicode,r)
+          done=done+1
+        else
+          skip=skip+1
+        end
+      else
+        local u=tounicode(replacement)
+        if u then
+          cover(coverage,unicode,{ u })
+          done=done+1
+        else
+          skip=skip+1
+        end
+      end
+    end
+    return coverage
+  end
+  local function prepare_ligature(list,featuretype,nocheck)
+    local coverage={}
+    local cover=coveractions[featuretype]
+    for code,ligature in next,list do
+      local unicode=tounicode(code)
+      local description=descriptions[unicode]
+      if not nocheck and not description then
+        skip=skip+1
+      else
+        if type(ligature)=="string" then
+          ligature={ lpegmatch(splitter,ligature) }
+        end
+        local present=true
+        for i=1,#ligature do
+          local l=ligature[i]
+          local u=tounicode(l)
+          if nocheck or descriptions[u] then
+            ligature[i]=u
+          else
+            present=false
+            break
+          end
+        end
+        if present then
+          cover(coverage,unicode,ligature)
+          done=done+1
+        else
+          skip=skip+1
+        end
+      end
+    end
+    return coverage
+  end
+  local function resetspacekerns()
+    data.properties.hasspacekerns=true
+    data.resources .spacekerns=nil
+  end
+  local function prepare_kern(list,featuretype)
+    local coverage={}
+    local cover=coveractions[featuretype]
+    local isspace=false
+    for code,replacement in next,list do
+      local unicode=tounicode(code)
+      local description=descriptions[unicode]
+      if description and type(replacement)=="table" then
+        local r={}
+        for k,v in next,replacement do
+          local u=tounicode(k)
+          if u then
+            r[u]=v
+            if u==32 then
+              isspace=true
+            end
+          end
+        end
+        if next(r) then
+          cover(coverage,unicode,r)
+          done=done+1
+          if unicode==32 then
+            isspace=true
+          end
+        else
+          skip=skip+1
+        end
+      else
+        skip=skip+1
+      end
+    end
+    if isspace then
+      resetspacekerns()
+    end
+    return coverage
+  end
+  local function prepare_pair(list,featuretype)
+    local coverage={}
+    local cover=coveractions[featuretype]
+    if cover then
+      for code,replacement in next,list do
+        local unicode=tounicode(code)
+        local description=descriptions[unicode]
+        if description and type(replacement)=="table" then
+          local r={}
+          for k,v in next,replacement do
+            local u=tounicode(k)
+            if u then
+              r[u]=v
+              if u==32 then
+                isspace=true
+              end
+            end
+          end
+          if next(r) then
+            cover(coverage,unicode,r)
+            done=done+1
+            if unicode==32 then
+              isspace=true
+            end
+          else
+            skip=skip+1
+          end
+        else
+          skip=skip+1
+        end
+      end
+      if isspace then
+        resetspacekerns()
+      end
+    else
+      report_otf("unknown cover type %a",featuretype)
+    end
+    return coverage
+  end
+  local prepare_single=prepare_pair 
+  local function prepare_chain(list,featuretype,sublookups)
+    local rules=list.rules
+    local coverage={}
+    if rules then
+      local rulehash={}
+      local rulesize=0
+      local lookuptype=types[featuretype]
+      for nofrules=1,#rules do
+        local rule=rules[nofrules]
+        local current=rule.current
+        local before=rule.before
+        local after=rule.after
+        local replacements=rule.replacements or false
+        local sequence={}
+        local nofsequences=0
+        if before then
+          for n=1,#before do
+            nofsequences=nofsequences+1
+            sequence[nofsequences]=before[n]
+          end
+        end
+        local start=nofsequences+1
+        for n=1,#current do
+          nofsequences=nofsequences+1
+          sequence[nofsequences]=current[n]
+        end
+        local stop=nofsequences
+        if after then
+          for n=1,#after do
+            nofsequences=nofsequences+1
+            sequence[nofsequences]=after[n]
+          end
+        end
+        local lookups=rule.lookups or false
+        local subtype=nil
+        if lookups and sublookups then
+          for k,v in next,lookups do
+            local t=type(v)
+            if t=="table" then
+              for i=1,#v do
+                local vi=v[i]
+                if type(vi)~="table" then
+                  v[i]={ vi }
+                end
+              end
+            elseif t=="number" then
+              local lookup=sublookups[v]
+              if lookup then
+                lookups[k]={ lookup }
+                if not subtype then
+                  subtype=lookup.type
+                end
+              else
+                lookups[k]={ false } 
+              end
+            else
+              lookups[k]={ false } 
+            end
+          end
+        end
+        if nofsequences>0 then
+          local hashed={}
+          for i=1,nofsequences do
+            local t={}
+            local s=sequence[i]
+            for i=1,#s do
+              local u=tounicode(s[i])
+              if u then
+                t[u]=true
+              end
+            end
+            hashed[i]=t
+          end
+          sequence=hashed
+          rulesize=rulesize+1
+          rulehash[rulesize]={
+            nofrules,
+            lookuptype,
+            sequence,
+            start,
+            stop,
+            lookups,
+            replacements,
+            subtype,
+          }
+          for unic in next,sequence[start] do
+            local cu=coverage[unic]
+            if not cu then
+              coverage[unic]=rulehash 
+            end
+          end
+          sequence.n=nofsequences
+        end
+      end
+      rulehash.n=rulesize
+    end
+    return coverage
+  end
+  local dataset=specifications.dataset
+  local function report(name,category,position,first,last,sequences)
+    report_otf("injecting name %a of category %a at position %i in [%i,%i] of [%i,%i]",
+      name,category,position,first,last,1,#sequences)
+  end
+  local function inject(specification,sequences,sequence,first,last,category,name)
+    local position=specification.position or false
+    if not position then
+      position=specification.prepend
+      if position==true then
+        if trace_loading then
+          report(name,category,first,first,last,sequences)
+        end
+        insert(sequences,first,sequence)
+        return
+      end
+    end
+    if not position then
+      position=specification.append
+      if position==true then
+        if trace_loading then
+          report(name,category,last+1,first,last,sequences)
+        end
+        insert(sequences,last+1,sequence)
+        return
+      end
+    end
+    local kind=type(position)
+    if kind=="string" then
+      local index=false
+      for i=first,last do
+        local s=sequences[i]
+        local f=s.features
+        if f then
+          for k in next,f do
+            if k==position then
+                index=i
+              break
+            end
+          end
+          if index then
+            break
+          end
+        end
+      end
+      if index then
+        position=index
+      else
+        position=last+1
+      end
+    elseif kind=="number" then
+      if position<0 then
+        position=last-position+1
+      end
+      if position>last then
+        position=last+1
+      elseif position<first then
+        position=first
+      end
+    else
+      position=last+1
+    end
+    if trace_loading then
+      report(name,category,position,first,last,sequences)
+    end
+    insert(sequences,position,sequence)
+  end
+  for s=1,#dataset do
+    local specification=dataset[s]
+    local valid=specification.valid 
+    local feature=specification.name or feature
+    if not feature or feature=="" then
+      report_otf("no valid name given for extra feature")
+    elseif not valid or valid(data,specification,feature) then 
+      local initialize=specification.initialize
+      if initialize then
+        specification.initialize=initialize(specification,data) and initialize or nil
+      end
+      local askedfeatures=specification.features or everywhere
+      local askedsteps=specification.steps or specification.subtables or { specification.data } or {}
+      local featuretype=normalized[specification.type or "substitution"] or "substitution"
+      local featureflags=specification.flags or noflags
+      local nocheck=specification.nocheck
+      local futuresteps=specification.futuresteps
+      local featureorder=specification.order or { feature }
+      local featurechain=(featuretype=="chainsubstitution" or featuretype=="chainposition") and 1 or 0
+      local nofsteps=0
+      local steps={}
+      local sublookups=specification.lookups
+      local category=nil
+      checkflags(specification,resources)
+      if sublookups then
+        local s={}
+        for i=1,#sublookups do
+          local specification=sublookups[i]
+          local askedsteps=specification.steps or specification.subtables or { specification.data } or {}
+          local featuretype=normalized[specification.type or "substitution"] or "substitution"
+          local featureflags=specification.flags or noflags
+          local nofsteps=0
+          local steps={}
+          for i=1,#askedsteps do
+            local list=askedsteps[i]
+            local coverage=nil
+            local format=nil
+            if featuretype=="substitution" then
+              coverage=prepare_substitution(list,featuretype,nocheck)
+            elseif featuretype=="ligature" then
+              coverage=prepare_ligature(list,featuretype,nocheck)
+            elseif featuretype=="alternate" then
+              coverage=prepare_alternate(list,featuretype,nocheck)
+            elseif featuretype=="multiple" then
+              coverage=prepare_multiple(list,featuretype,nocheck)
+            elseif featuretype=="kern" or featuretype=="move" then
+              format=featuretype
+              coverage=prepare_kern(list,featuretype)
+            elseif featuretype=="pair" then
+              format="pair"
+              coverage=prepare_pair(list,featuretype)
+            elseif featuretype=="single" then
+              format="single"
+              coverage=prepare_single(list,featuretype)
+            end
+            if coverage and next(coverage) then
+              nofsteps=nofsteps+1
+              steps[nofsteps]=register(coverage,featuretype,format,feature,nofsteps,descriptions,resources)
+            end
+          end
+          checkmerge(specification)
+          checksteps(specification)
+          s[i]={
+            [stepkey]=steps,
+            nofsteps=nofsteps,
+            flags=featureflags,
+            type=types[featuretype],
+          }
+        end
+        sublookups=s
+      end
+      for i=1,#askedsteps do
+        local list=askedsteps[i]
+        local coverage=nil
+        local format=nil
+        if featuretype=="substitution" then
+          category="gsub"
+          coverage=prepare_substitution(list,featuretype,nocheck)
+        elseif featuretype=="ligature" then
+          category="gsub"
+          coverage=prepare_ligature(list,featuretype,nocheck)
+        elseif featuretype=="alternate" then
+          category="gsub"
+          coverage=prepare_alternate(list,featuretype,nocheck)
+        elseif featuretype=="multiple" then
+          category="gsub"
+          coverage=prepare_multiple(list,featuretype,nocheck)
+        elseif featuretype=="kern" or featuretype=="move" then
+          category="gpos"
+          format=featuretype
+          coverage=prepare_kern(list,featuretype)
+        elseif featuretype=="pair" then
+          category="gpos"
+          format="pair"
+          coverage=prepare_pair(list,featuretype)
+        elseif featuretype=="single" then
+          category="gpos"
+          format="single"
+          coverage=prepare_single(list,featuretype)
+        elseif featuretype=="chainsubstitution" then
+          category="gsub"
+          coverage=prepare_chain(list,featuretype,sublookups)
+        elseif featuretype=="chainposition" then
+          category="gpos"
+          coverage=prepare_chain(list,featuretype,sublookups)
+        else
+          report_otf("not registering feature %a, unknown category",feature)
+          return
+        end
+        if coverage and next(coverage) then
+          nofsteps=nofsteps+1
+          steps[nofsteps]=register(coverage,featuretype,format,feature,nofsteps,descriptions,resources)
+        end
+      end
+      if nofsteps>0 then
+        for k,v in next,askedfeatures do
+          if v[1] then
+            askedfeatures[k]=tohash(v)
+          end
+        end
+        if featureflags[1] then featureflags[1]="mark" end
+        if featureflags[2] then featureflags[2]="ligature" end
+        if featureflags[3] then featureflags[3]="base" end
+        local steptype=types[featuretype]
+        local sequence={
+          chain=featurechain,
+          features={ [feature]=askedfeatures },
+          flags=featureflags,
+          name=feature,
+          order=featureorder,
+          [stepkey]=steps,
+          nofsteps=nofsteps,
+          type=steptype,
+        }
+        checkflags(sequence,resources)
+        checkmerge(sequence)
+        checksteps(sequence)
+        local first,last=getrange(sequences,category)
+        inject(specification,sequences,sequence,first,last,category,feature)
+        local features=fontfeatures[category]
+        if not features then
+          features={}
+          fontfeatures[category]=features
+        end
+        local k=features[feature]
+        if not k then
+          k={}
+          features[feature]=k
+        end
+        for script,languages in next,askedfeatures do
+          local kk=k[script]
+          if not kk then
+            kk={}
+            k[script]=kk
+          end
+          for language,value in next,languages do
+            kk[language]=value
+          end
+        end
+      end
+    end
+  end
+  if trace_loading then
+    report_otf("registering feature %a, affected glyphs %a, skipped glyphs %a",feature,done,skip)
+  end
+end
+otf.enhancers.addfeature=addfeature
+local extrafeatures={}
+local knownfeatures={}
+function otf.addfeature(name,specification)
+  if type(name)=="table" then
+    specification=name
+  end
+  if type(specification)~="table" then
+    report_otf("invalid feature specification, no valid table")
+    return
+  end
+  specification,name=validspecification(specification,name)
+  if name and specification then
+    local slot=knownfeatures[name]
+    if not slot then
+      slot=#extrafeatures+1
+      knownfeatures[name]=slot
+    elseif specification.overload==false then
+      slot=#extrafeatures+1
+      knownfeatures[name]=slot
+    else
+    end
+    specification.name=name 
+    extrafeatures[slot]=specification
+  end
+end
+local function enhance(data,filename,raw)
+  for slot=1,#extrafeatures do
+    local specification=extrafeatures[slot]
+    addfeature(data,specification.name,specification)
+  end
+end
+otf.enhancers.enhance=enhance
+otf.enhancers.register("check extra features",enhance)
+local tlig={
+  [0x2013]={ 0x002D,0x002D },
+  [0x2014]={ 0x002D,0x002D,0x002D },
+}
+local tlig_specification={
+  type="ligature",
+  features=everywhere,
+  data=tlig,
+  order={ "tlig" },
+  flags=noflags,
+  prepend=true,
+}
+otf.addfeature("tlig",tlig_specification)
+registerotffeature {
+  name='tlig',
+  description='tex ligatures',
+}
+local trep={
+  [0x0027]=0x2019,
+}
+local trep_specification={
+  type="substitution",
+  features=everywhere,
+  data=trep,
+  order={ "trep" },
+  flags=noflags,
+  prepend=true,
+}
+otf.addfeature("trep",trep_specification)
+registerotffeature {
+  name='trep',
+  description='tex replacements',
+}
+local anum_arabic={
+  [0x0030]=0x0660,
+  [0x0031]=0x0661,
+  [0x0032]=0x0662,
+  [0x0033]=0x0663,
+  [0x0034]=0x0664,
+  [0x0035]=0x0665,
+  [0x0036]=0x0666,
+  [0x0037]=0x0667,
+  [0x0038]=0x0668,
+  [0x0039]=0x0669,
+}
+local anum_persian={
+  [0x0030]=0x06F0,
+  [0x0031]=0x06F1,
+  [0x0032]=0x06F2,
+  [0x0033]=0x06F3,
+  [0x0034]=0x06F4,
+  [0x0035]=0x06F5,
+  [0x0036]=0x06F6,
+  [0x0037]=0x06F7,
+  [0x0038]=0x06F8,
+  [0x0039]=0x06F9,
+}
+local function valid(data)
+  local features=data.resources.features
+  if features then
+    for k,v in next,features do
+      for k,v in next,v do
+        if v.arab then
+          return true
+        end
+      end
+    end
+  end
+end
+local anum_specification={
+  {
+    type="substitution",
+    features={ arab={ urd=true,dflt=true } },
+    order={ "anum" },
+    data=anum_arabic,
+    flags=noflags,
+    valid=valid,
+  },
+  {
+    type="substitution",
+    features={ arab={ urd=true } },
+    order={ "anum" },
+    data=anum_persian,
+    flags=noflags,
+    valid=valid,
+  },
+}
+otf.addfeature("anum",anum_specification) 
+registerotffeature {
+  name='anum',
+  description='arabic digits',
+}
+local lookups={}
+local protect={}
+local revert={}
+local zwj={ 0x200C }
+otf.addfeature {
+  name="blockligatures",
+  type="chainsubstitution",
+  nocheck=true,
+  prepend=true,
+  future=true,
+  lookups={
+    {
+      type="multiple",
+      data=lookups,
+    },
+  },
+  data={
+    rules=protect,
+  }
+}
+otf.addfeature {
+  name="blockligatures",
+  type="chainsubstitution",
+  nocheck=true,
+  append=true,
+  overload=false,
+  lookups={
+    {
+      type="ligature",
+      data=lookups,
+    },
+  },
+  data={
+    rules=revert,
+  }
+}
+registerotffeature {
+  name='blockligatures',
+  description='block certain ligatures',
+}
+local settings_to_array=utilities.parsers and utilities.parsers.settings_to_array
+            or function(s) return string.split(s,",") end 
+local function blockligatures(str)
+  local t=settings_to_array(str)
+  for i=1,#t do
+    local ti=utfsplit(t[i])
+    if #ti>1 then
+      local one=ti[1]
+      local two=ti[2]
+      lookups[one]={ one,0x200C }
+      local one={ one }
+      local two={ two }
+      local new=#protect+1
+      protect[new]={
+        current={ one,two },
+        lookups={ 1 },
+      }
+      revert[new]={
+        current={ one,zwj },
+        after={ two },
+        lookups={ 1 },
+      }
+    end
+  end
+end
+otf.helpers.blockligatures=blockligatures
+if context then
+  interfaces.implement {
+    name="blockligatures",
+    arguments="string",
+    actions=blockligatures,
+  }
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-onr']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local fonts,logs,trackers,resolvers=fonts,logs,trackers,resolvers
+local next,type,tonumber,rawget,rawset=next,type,tonumber,rawget,rawset
+local match,lower,gsub,strip,find=string.match,string.lower,string.gsub,string.strip,string.find
+local char,byte,sub=string.char,string.byte,string.sub
+local abs=math.abs
+local bxor,rshift=bit32.bxor,bit32.rshift
+local P,S,R,Cmt,C,Ct,Cs,Carg,Cf,Cg=lpeg.P,lpeg.S,lpeg.R,lpeg.Cmt,lpeg.C,lpeg.Ct,lpeg.Cs,lpeg.Carg,lpeg.Cf,lpeg.Cg
+local lpegmatch,patterns=lpeg.match,lpeg.patterns
+local trace_indexing=false trackers.register("afm.indexing",function(v) trace_indexing=v end)
+local trace_loading=false trackers.register("afm.loading",function(v) trace_loading=v end)
+local report_afm=logs.reporter("fonts","afm loading")
+local report_pfb=logs.reporter("fonts","pfb loading")
+local handlers=fonts.handlers
+local afm=handlers.afm or {}
+handlers.afm=afm
+local readers=afm.readers or {}
+afm.readers=readers
+afm.version=1.513
+local get_indexes,get_shapes
+do
+  local decrypt
+  do
+    local r,c1,c2,n=0,0,0,0
+    local function step(c)
+      local cipher=byte(c)
+      local plain=bxor(cipher,rshift(r,8))
+      r=((cipher+r)*c1+c2)%65536
+      return char(plain)
+    end
+    decrypt=function(binary,initial,seed)
+      r,c1,c2,n=initial,52845,22719,seed
+      binary=gsub(binary,".",step)
+      return sub(binary,n+1)
+    end
+  end
+  local charstrings=P("/CharStrings")
+  local subroutines=P("/Subrs")
+  local encoding=P("/Encoding")
+  local dup=P("dup")
+  local put=P("put")
+  local array=P("array")
+  local name=P("/")*C((R("az","AZ","09")+S("-_."))^1)
+  local digits=R("09")^1
+  local cardinal=digits/tonumber
+  local spaces=P(" ")^1
+  local spacing=patterns.whitespace^0
+  local routines,vector,chars,n,m
+  local initialize=function(str,position,size)
+    n=0
+    m=size 
+    return position+1
+  end
+  local setroutine=function(str,position,index,size,filename)
+    local forward=position+tonumber(size)
+    local stream=decrypt(sub(str,position+1,forward),4330,4)
+    routines[index]={ byte(stream,1,#stream) }
+    return forward
+  end
+  local setvector=function(str,position,name,size,filename)
+    local forward=position+tonumber(size)
+    if n>=m then
+      return #str
+    elseif forward<#str then
+      if n==0 and name~=".notdef" then
+        report_pfb("reserving .notdef at index 0 in %a",filename) 
+        n=n+1
+      end
+      vector[n]=name
+      n=n+1
+      return forward
+    else
+      return #str
+    end
+  end
+  local setshapes=function(str,position,name,size,filename)
+    local forward=position+tonumber(size)
+    local stream=sub(str,position+1,forward)
+    if n>m then
+      return #str
+    elseif forward<#str then
+      if n==0 and name~=".notdef" then
+        report_pfb("reserving .notdef at index 0 in %a",filename) 
+        n=n+1
+      end
+      vector[n]=name
+      n=n+1
+      chars [n]=decrypt(stream,4330,4)
+      return forward
+    else
+      return #str
+    end
+  end
+  local p_rd=spacing*(P("RD")+P("-|"))
+  local p_np=spacing*(P("NP")+P("|"))
+  local p_nd=spacing*(P("ND")+P("|"))
+  local p_filterroutines=
+    (1-subroutines)^0*subroutines*spaces*Cmt(cardinal,initialize)*(Cmt(cardinal*spaces*cardinal*p_rd*Carg(1),setroutine)*p_np+P(1))^1
+  local p_filtershapes=
+    (1-charstrings)^0*charstrings*spaces*Cmt(cardinal,initialize)*(Cmt(name*spaces*cardinal*p_rd*Carg(1),setshapes)*p_nd+P(1))^1
+  local p_filternames=Ct (
+    (1-charstrings)^0*charstrings*spaces*Cmt(cardinal,initialize)*(Cmt(name*spaces*cardinal*Carg(1),setvector)+P(1))^1
+  )
+  local p_filterencoding=(1-encoding)^0*encoding*spaces*digits*spaces*array*(1-dup)^0*Cf(
+      Ct("")*Cg(spacing*dup*spaces*cardinal*spaces*name*spaces*put)^1
+,rawset)
+  local function loadpfbvector(filename,shapestoo)
+    local data=io.loaddata(resolvers.findfile(filename))
+    if not data then
+      report_pfb("no data in %a",filename)
+      return
+    end
+    if not (find(data,"!PS%-AdobeFont%-") or find(data,"%%!FontType1")) then
+      report_pfb("no font in %a",filename)
+      return
+    end
+    local ascii,binary=match(data,"(.*)eexec%s+......(.*)")
+    if not binary then
+      report_pfb("no binary data in %a",filename)
+      return
+    end
+    binary=decrypt(binary,55665,4)
+    local names={}
+    local encoding=lpegmatch(p_filterencoding,ascii)
+    local glyphs={}
+    routines,vector,chars={},{},{}
+    if shapestoo then
+      lpegmatch(p_filterroutines,binary,1,filename)
+      lpegmatch(p_filtershapes,binary,1,filename)
+      local data={
+        dictionaries={
+          {
+            charstrings=chars,
+            charset=vector,
+            subroutines=routines,
+          }
+        },
+      }
+      fonts.handlers.otf.readers.parsecharstrings(false,data,glyphs,true,true)
+    else
+      lpegmatch(p_filternames,binary,1,filename)
+    end
+    names=vector
+    routines,vector,chars=nil,nil,nil
+    return names,encoding,glyphs
+  end
+  local pfb=handlers.pfb or {}
+  handlers.pfb=pfb
+  pfb.loadvector=loadpfbvector
+  get_indexes=function(data,pfbname)
+    local vector=loadpfbvector(pfbname)
+    if vector then
+      local characters=data.characters
+      if trace_loading then
+        report_afm("getting index data from %a",pfbname)
+      end
+      for index=0,#vector do 
+        local name=vector[index]
+        local char=characters[name]
+        if char then
+          if trace_indexing then
+            report_afm("glyph %a has index %a",name,index)
+          end
+          char.index=index
+        else
+          if trace_indexing then
+            report_afm("glyph %a has index %a but no data",name,index)
+          end
+        end
+      end
+    end
+  end
+  get_shapes=function(pfbname)
+    local vector,encoding,glyphs=loadpfbvector(pfbname,true)
+    return glyphs
+  end
+end
+local spacer=patterns.spacer
+local whitespace=patterns.whitespace
+local lineend=patterns.newline
+local spacing=spacer^0
+local number=spacing*S("+-")^-1*(R("09")+S("."))^1/tonumber
+local name=spacing*C((1-whitespace)^1)
+local words=spacing*((1-lineend)^1/strip)
+local rest=(1-lineend)^0
+local fontdata=Carg(1)
+local semicolon=spacing*P(";")
+local plus=spacing*P("plus")*number
+local minus=spacing*P("minus")*number
+local function addkernpair(data,one,two,value)
+  local chr=data.characters[one]
+  if chr then
+    local kerns=chr.kerns
+    if kerns then
+      kerns[two]=tonumber(value)
+    else
+      chr.kerns={ [two]=tonumber(value) }
+    end
+  end
+end
+local p_kernpair=(fontdata*P("KPX")*name*name*number)/addkernpair
+local chr=false
+local ind=0
+local function start(data,version)
+  data.metadata.afmversion=version
+  ind=0
+  chr={}
+end
+local function stop()
+  ind=0
+  chr=false
+end
+local function setindex(i)
+  if i<0 then
+    ind=ind+1 
+  else
+    ind=i
+  end
+  chr={
+    index=ind
+  }
+end
+local function setwidth(width)
+  chr.width=width
+end
+local function setname(data,name)
+  data.characters[name]=chr
+end
+local function setboundingbox(boundingbox)
+  chr.boundingbox=boundingbox
+end
+local function setligature(plus,becomes)
+  local ligatures=chr.ligatures
+  if ligatures then
+    ligatures[plus]=becomes
+  else
+    chr.ligatures={ [plus]=becomes }
+  end
+end
+local p_charmetric=((
+  P("C")*number/setindex+P("WX")*number/setwidth+P("N")*fontdata*name/setname+P("B")*Ct((number)^4)/setboundingbox+P("L")*(name)^2/setligature
+ )*semicolon )^1
+local p_charmetrics=P("StartCharMetrics")*number*(p_charmetric+(1-P("EndCharMetrics")))^0*P("EndCharMetrics")
+local p_kernpairs=P("StartKernPairs")*number*(p_kernpair+(1-P("EndKernPairs" )))^0*P("EndKernPairs" )
+local function set_1(data,key,a)   data.metadata[lower(key)]=a      end
+local function set_2(data,key,a,b)  data.metadata[lower(key)]={ a,b }  end
+local function set_3(data,key,a,b,c) data.metadata[lower(key)]={ a,b,c } end
+local p_parameters=P(false)+fontdata*((P("FontName")+P("FullName")+P("FamilyName"))/lower)*words/function(data,key,value)
+    data.metadata[key]=value
+  end+fontdata*((P("Weight")+P("Version"))/lower)*name/function(data,key,value)
+    data.metadata[key]=value
+  end+fontdata*P("IsFixedPitch")*name/function(data,pitch)
+    data.metadata.monospaced=toboolean(pitch,true)
+  end+fontdata*P("FontBBox")*Ct(number^4)/function(data,boundingbox)
+    data.metadata.boundingbox=boundingbox
+ end+fontdata*((P("CharWidth")+P("CapHeight")+P("XHeight")+P("Descender")+P("Ascender")+P("ItalicAngle"))/lower)*number/function(data,key,value)
+    data.metadata[key]=value
+  end+P("Comment")*spacing*(P(false)+(fontdata*C("DESIGNSIZE")*number*rest)/set_1 
++(fontdata*C("TFM designsize")*number*rest)/set_1+(fontdata*C("DesignSize")*number*rest)/set_1+(fontdata*C("CODINGSCHEME")*words*rest)/set_1 
++(fontdata*C("CHECKSUM")*number*words*rest)/set_1 
++(fontdata*C("SPACE")*number*plus*minus*rest)/set_3 
++(fontdata*C("QUAD")*number*rest)/set_1 
++(fontdata*C("EXTRASPACE")*number*rest)/set_1 
++(fontdata*C("NUM")*number*number*number*rest)/set_3 
++(fontdata*C("DENOM")*number*number*rest)/set_2 
++(fontdata*C("SUP")*number*number*number*rest)/set_3 
++(fontdata*C("SUB")*number*number*rest)/set_2 
++(fontdata*C("SUPDROP")*number*rest)/set_1 
++(fontdata*C("SUBDROP")*number*rest)/set_1 
++(fontdata*C("DELIM")*number*number*rest)/set_2 
++(fontdata*C("AXISHEIGHT")*number*rest)/set_1 
+  )
+local fullparser=(P("StartFontMetrics")*fontdata*name/start )*(p_charmetrics+p_kernpairs+p_parameters+(1-P("EndFontMetrics")) )^0*(P("EndFontMetrics")/stop )
+local infoparser=(P("StartFontMetrics")*fontdata*name/start )*(p_parameters+(1-P("EndFontMetrics")) )^0*(P("EndFontMetrics")/stop )
+local function read(filename,parser)
+  local afmblob=io.loaddata(filename)
+  if afmblob then
+    local data={
+      resources={
+        filename=resolvers.unresolve(filename),
+        version=afm.version,
+        creator="context mkiv",
+      },
+      properties={
+        hasitalics=false,
+      },
+      goodies={},
+      metadata={
+        filename=file.removesuffix(file.basename(filename))
+      },
+      characters={
+      },
+      descriptions={
+      },
+    }
+    if trace_loading then
+      report_afm("parsing afm file %a",filename)
+    end
+    lpegmatch(parser,afmblob,1,data)
+    return data
+  else
+    if trace_loading then
+      report_afm("no valid afm file %a",filename)
+    end
+    return nil
+  end
+end
+function readers.loadfont(afmname,pfbname)
+  local data=read(resolvers.findfile(afmname),fullparser)
+  if data then
+    if not pfbname or pfbname=="" then
+      pfbname=resolvers.findfile(file.replacesuffix(file.nameonly(afmname),"pfb"))
+    end
+    if pfbname and pfbname~="" then
+      data.resources.filename=resolvers.unresolve(pfbname)
+      get_indexes(data,pfbname)
+      return data
+    else 
+      report_afm("no pfb file for %a",afmname)
+    end
+  end
+end
+function readers.loadshapes(filename)
+  local fullname=resolvers.findfile(filename) or ""
+  if fullname=="" then
+    return {
+      filename="not found: "..filename,
+      glyphs={}
+    }
+  else
+    return {
+      filename=fullname,
+      format="opentype",
+      glyphs=get_shapes(fullname) or {},
+      units=1000,
+    }
+  end
+end
+function readers.getinfo(filename)
+  local data=read(resolvers.findfile(filename),infoparser)
+  if data then
+    return data.metadata
+  end
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-one']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local fonts,logs,trackers,containers,resolvers=fonts,logs,trackers,containers,resolvers
+local next,type,tonumber,rawget=next,type,tonumber,rawget
+local match,gmatch,lower,gsub,strip,find=string.match,string.gmatch,string.lower,string.gsub,string.strip,string.find
+local char,byte,sub=string.char,string.byte,string.sub
+local abs=math.abs
+local bxor,rshift=bit32.bxor,bit32.rshift
+local P,S,R,Cmt,C,Ct,Cs,Carg=lpeg.P,lpeg.S,lpeg.R,lpeg.Cmt,lpeg.C,lpeg.Ct,lpeg.Cs,lpeg.Carg
+local lpegmatch,patterns=lpeg.match,lpeg.patterns
+local trace_features=false trackers.register("afm.features",function(v) trace_features=v end)
+local trace_indexing=false trackers.register("afm.indexing",function(v) trace_indexing=v end)
+local trace_loading=false trackers.register("afm.loading",function(v) trace_loading=v end)
+local trace_defining=false trackers.register("fonts.defining",function(v) trace_defining=v end)
+local report_afm=logs.reporter("fonts","afm loading")
+local setmetatableindex=table.setmetatableindex
+local derivetable=table.derive
+local findbinfile=resolvers.findbinfile
+local privateoffset=fonts.constructors and fonts.constructors.privateoffset or 0xF0000 
+local definers=fonts.definers
+local readers=fonts.readers
+local constructors=fonts.constructors
+local afm=constructors.handlers.afm
+local pfb=constructors.handlers.pfb
+local otf=fonts.handlers.otf
+local otfreaders=otf.readers
+local otfenhancers=otf.enhancers
+local afmfeatures=constructors.features.afm
+local registerafmfeature=afmfeatures.register
+local afmenhancers=constructors.enhancers.afm
+local registerafmenhancer=afmenhancers.register
+afm.version=1.512 
+afm.cache=containers.define("fonts","one",afm.version,true)
+afm.autoprefixed=true 
+afm.helpdata={} 
+afm.syncspace=true 
+local overloads=fonts.mappings.overloads
+local applyruntimefixes=fonts.treatments and fonts.treatments.applyfixes
+function afm.load(filename)
+  filename=resolvers.findfile(filename,'afm') or ""
+  if filename~="" and not fonts.names.ignoredfile(filename) then
+    local name=file.removesuffix(file.basename(filename))
+    local data=containers.read(afm.cache,name)
+    local attr=lfs.attributes(filename)
+    local size,time=attr.size or 0,attr.modification or 0
+    local pfbfile=file.replacesuffix(name,"pfb")
+    local pfbname=resolvers.findfile(pfbfile,"pfb") or ""
+    if pfbname=="" then
+      pfbname=resolvers.findfile(file.basename(pfbfile),"pfb") or ""
+    end
+    local pfbsize,pfbtime=0,0
+    if pfbname~="" then
+      local attr=lfs.attributes(pfbname)
+      pfbsize=attr.size or 0
+      pfbtime=attr.modification or 0
+    end
+    if not data or data.size~=size or data.time~=time or data.pfbsize~=pfbsize or data.pfbtime~=pfbtime then
+      report_afm("reading %a",filename)
+      data=afm.readers.loadfont(filename,pfbname)
+      if data then
+        afmenhancers.apply(data,filename)
+        fonts.mappings.addtounicode(data,filename)
+        otfreaders.pack(data)
+        data.size=size
+        data.time=time
+        data.pfbsize=pfbsize
+        data.pfbtime=pfbtime
+        report_afm("saving %a in cache",name)
+        data=containers.write(afm.cache,name,data)
+        data=containers.read(afm.cache,name)
+      end
+    end
+    if data then
+      otfreaders.unpack(data)
+      otfreaders.expand(data) 
+      otfreaders.addunicodetable(data) 
+      otfenhancers.apply(data,filename,data)
+      if applyruntimefixes then
+        applyruntimefixes(filename,data)
+      end
+    end
+    return data
+  end
+end
+local uparser=fonts.mappings.makenameparser() 
+local function enhance_unify_names(data,filename)
+  local unicodevector=fonts.encodings.agl.unicodes 
+  local unicodes={}
+  local names={}
+  local private=data.private or privateoffset
+  local descriptions=data.descriptions
+  for name,blob in next,data.characters do
+    local code=unicodevector[name] 
+    if not code then
+      code=lpegmatch(uparser,name)
+      if type(code)~="number" then
+        code=private
+        private=private+1
+        report_afm("assigning private slot %U for unknown glyph name %a",code,name)
+      end
+    end
+    local index=blob.index
+    unicodes[name]=code
+    names[name]=index
+    blob.name=name
+    descriptions[code]={
+      boundingbox=blob.boundingbox,
+      width=blob.width,
+      kerns=blob.kerns,
+      index=index,
+      name=name,
+    }
+  end
+  for unicode,description in next,descriptions do
+    local kerns=description.kerns
+    if kerns then
+      local krn={}
+      for name,kern in next,kerns do
+        local unicode=unicodes[name]
+        if unicode then
+          krn[unicode]=kern
+        else
+        end
+      end
+      description.kerns=krn
+    end
+  end
+  data.characters=nil
+  data.private=private
+  local resources=data.resources
+  local filename=resources.filename or file.removesuffix(file.basename(filename))
+  resources.filename=resolvers.unresolve(filename) 
+  resources.unicodes=unicodes 
+  resources.marks={}
+end
+local everywhere={ ["*"]={ ["*"]=true } } 
+local noflags={ false,false,false,false }
+local function enhance_normalize_features(data)
+  local ligatures=setmetatableindex("table")
+  local kerns=setmetatableindex("table")
+  local extrakerns=setmetatableindex("table")
+  for u,c in next,data.descriptions do
+    local l=c.ligatures
+    local k=c.kerns
+    local e=c.extrakerns
+    if l then
+      ligatures[u]=l
+      for u,v in next,l do
+        l[u]={ ligature=v }
+      end
+      c.ligatures=nil
+    end
+    if k then
+      kerns[u]=k
+      for u,v in next,k do
+        k[u]=v 
+      end
+      c.kerns=nil
+    end
+    if e then
+      extrakerns[u]=e
+      for u,v in next,e do
+        e[u]=v 
+      end
+      c.extrakerns=nil
+    end
+  end
+  local features={
+    gpos={},
+    gsub={},
+  }
+  local sequences={
+  }
+  if next(ligatures) then
+    features.gsub.liga=everywhere
+    data.properties.hasligatures=true
+    sequences[#sequences+1]={
+      features={
+        liga=everywhere,
+      },
+      flags=noflags,
+      name="s_s_0",
+      nofsteps=1,
+      order={ "liga" },
+      type="gsub_ligature",
+      steps={
+        {
+          coverage=ligatures,
+        },
+      },
+    }
+  end
+  if next(kerns) then
+    features.gpos.kern=everywhere
+    data.properties.haskerns=true
+    sequences[#sequences+1]={
+      features={
+        kern=everywhere,
+      },
+      flags=noflags,
+      name="p_s_0",
+      nofsteps=1,
+      order={ "kern" },
+      type="gpos_pair",
+      steps={
+        {
+          format="kern",
+          coverage=kerns,
+        },
+      },
+    }
+  end
+  if next(extrakerns) then
+    features.gpos.extrakerns=everywhere
+    data.properties.haskerns=true
+    sequences[#sequences+1]={
+      features={
+        extrakerns=everywhere,
+      },
+      flags=noflags,
+      name="p_s_1",
+      nofsteps=1,
+      order={ "extrakerns" },
+      type="gpos_pair",
+      steps={
+        {
+          format="kern",
+          coverage=extrakerns,
+        },
+      },
+    }
+  end
+  data.resources.features=features
+  data.resources.sequences=sequences
+end
+local function enhance_fix_names(data)
+  for k,v in next,data.descriptions do
+    local n=v.name
+    local r=overloads[n]
+    if r then
+      local name=r.name
+      if trace_indexing then
+        report_afm("renaming characters %a to %a",n,name)
+      end
+      v.name=name
+      v.unicode=r.unicode
+    end
+  end
+end
+local addthem=function(rawdata,ligatures)
+  if ligatures then
+    local descriptions=rawdata.descriptions
+    local resources=rawdata.resources
+    local unicodes=resources.unicodes
+    for ligname,ligdata in next,ligatures do
+      local one=descriptions[unicodes[ligname]]
+      if one then
+        for _,pair in next,ligdata do
+          local two,three=unicodes[pair[1]],unicodes[pair[2]]
+          if two and three then
+            local ol=one.ligatures
+            if ol then
+              if not ol[two] then
+                ol[two]=three
+              end
+            else
+              one.ligatures={ [two]=three }
+            end
+          end
+        end
+      end
+    end
+  end
+end
+local function enhance_add_ligatures(rawdata)
+  addthem(rawdata,afm.helpdata.ligatures)
+end
+local function enhance_add_extra_kerns(rawdata) 
+  local descriptions=rawdata.descriptions
+  local resources=rawdata.resources
+  local unicodes=resources.unicodes
+  local function do_it_left(what)
+    if what then
+      for unicode,description in next,descriptions do
+        local kerns=description.kerns
+        if kerns then
+          local extrakerns
+          for complex,simple in next,what do
+            complex=unicodes[complex]
+            simple=unicodes[simple]
+            if complex and simple then
+              local ks=kerns[simple]
+              if ks and not kerns[complex] then
+                if extrakerns then
+                  extrakerns[complex]=ks
+                else
+                  extrakerns={ [complex]=ks }
+                end
+              end
+            end
+          end
+          if extrakerns then
+            description.extrakerns=extrakerns
+          end
+        end
+      end
+    end
+  end
+  local function do_it_copy(what)
+    if what then
+      for complex,simple in next,what do
+        complex=unicodes[complex]
+        simple=unicodes[simple]
+        if complex and simple then
+          local complexdescription=descriptions[complex]
+          if complexdescription then 
+            local simpledescription=descriptions[complex]
+            if simpledescription then
+              local extrakerns
+              local kerns=simpledescription.kerns
+              if kerns then
+                for unicode,kern in next,kerns do
+                  if extrakerns then
+                    extrakerns[unicode]=kern
+                  else
+                    extrakerns={ [unicode]=kern }
+                  end
+                end
+              end
+              local extrakerns=simpledescription.extrakerns
+              if extrakerns then
+                for unicode,kern in next,extrakerns do
+                  if extrakerns then
+                    extrakerns[unicode]=kern
+                  else
+                    extrakerns={ [unicode]=kern }
+                  end
+                end
+              end
+              if extrakerns then
+                complexdescription.extrakerns=extrakerns
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+  do_it_left(afm.helpdata.leftkerned)
+  do_it_left(afm.helpdata.bothkerned)
+  do_it_copy(afm.helpdata.bothkerned)
+  do_it_copy(afm.helpdata.rightkerned)
+end
+local function adddimensions(data) 
+  if data then
+    for unicode,description in next,data.descriptions do
+      local bb=description.boundingbox
+      if bb then
+        local ht,dp=bb[4],-bb[2]
+        if ht==0 or ht<0 then
+        else
+          description.height=ht
+        end
+        if dp==0 or dp<0 then
+        else
+          description.depth=dp
+        end
+      end
+    end
+  end
+end
+local function copytotfm(data)
+  if data and data.descriptions then
+    local metadata=data.metadata
+    local resources=data.resources
+    local properties=derivetable(data.properties)
+    local descriptions=derivetable(data.descriptions)
+    local goodies=derivetable(data.goodies)
+    local characters={}
+    local parameters={}
+    local unicodes=resources.unicodes
+    for unicode,description in next,data.descriptions do 
+      characters[unicode]={}
+    end
+    local filename=constructors.checkedfilename(resources)
+    local fontname=metadata.fontname or metadata.fullname
+    local fullname=metadata.fullname or metadata.fontname
+    local endash=0x0020 
+    local emdash=0x2014
+    local spacer="space"
+    local spaceunits=500
+    local monospaced=metadata.monospaced
+    local charwidth=metadata.charwidth
+    local italicangle=metadata.italicangle
+    local charxheight=metadata.xheight and metadata.xheight>0 and metadata.xheight
+    properties.monospaced=monospaced
+    parameters.italicangle=italicangle
+    parameters.charwidth=charwidth
+    parameters.charxheight=charxheight
+    if properties.monospaced then
+      if descriptions[endash] then
+        spaceunits,spacer=descriptions[endash].width,"space"
+      end
+      if not spaceunits and descriptions[emdash] then
+        spaceunits,spacer=descriptions[emdash].width,"emdash"
+      end
+      if not spaceunits and charwidth then
+        spaceunits,spacer=charwidth,"charwidth"
+      end
+    else
+      if descriptions[endash] then
+        spaceunits,spacer=descriptions[endash].width,"space"
+      end
+      if not spaceunits and charwidth then
+        spaceunits,spacer=charwidth,"charwidth"
+      end
+    end
+    spaceunits=tonumber(spaceunits)
+    if spaceunits<200 then
+    end
+    parameters.slant=0
+    parameters.space=spaceunits
+    parameters.space_stretch=500
+    parameters.space_shrink=333
+    parameters.x_height=400
+    parameters.quad=1000
+    if italicangle and italicangle~=0 then
+      parameters.italicangle=italicangle
+      parameters.italicfactor=math.cos(math.rad(90+italicangle))
+      parameters.slant=- math.tan(italicangle*math.pi/180)
+    end
+    if monospaced then
+      parameters.space_stretch=0
+      parameters.space_shrink=0
+    elseif afm.syncspace then
+      parameters.space_stretch=spaceunits/2
+      parameters.space_shrink=spaceunits/3
+    end
+    parameters.extra_space=parameters.space_shrink
+    if charxheight then
+      parameters.x_height=charxheight
+    else
+      local x=0x0078 
+      if x then
+        local x=descriptions[x]
+        if x then
+          parameters.x_height=x.height
+        end
+      end
+    end
+    if metadata.sup then
+      local dummy={ 0,0,0 }
+      parameters[ 1]=metadata.designsize    or 0
+      parameters[ 2]=metadata.checksum     or 0
+      parameters[ 3],
+      parameters[ 4],
+      parameters[ 5]=unpack(metadata.space   or dummy)
+      parameters[ 6]=metadata.quad    or 0
+      parameters[ 7]=metadata.extraspace or 0
+      parameters[ 8],
+      parameters[ 9],
+      parameters[10]=unpack(metadata.num    or dummy)
+      parameters[11],
+      parameters[12]=unpack(metadata.denom   or dummy)
+      parameters[13],
+      parameters[14],
+      parameters[15]=unpack(metadata.sup    or dummy)
+      parameters[16],
+      parameters[17]=unpack(metadata.sub    or dummy)
+      parameters[18]=metadata.supdrop  or 0
+      parameters[19]=metadata.subdrop  or 0
+      parameters[20],
+      parameters[21]=unpack(metadata.delim   or dummy)
+      parameters[22]=metadata.axisheight or 0
+    end
+    parameters.designsize=(metadata.designsize or 10)*65536
+    parameters.ascender=abs(metadata.ascender or 0)
+    parameters.descender=abs(metadata.descender or 0)
+    parameters.units=1000
+    properties.spacer=spacer
+    properties.encodingbytes=2
+    properties.format=fonts.formats[filename] or "type1"
+    properties.filename=filename
+    properties.fontname=fontname
+    properties.fullname=fullname
+    properties.psname=fullname
+    properties.name=filename or fullname or fontname
+    properties.private=properties.private or data.private or privateoffset
+    if next(characters) then
+      return {
+        characters=characters,
+        descriptions=descriptions,
+        parameters=parameters,
+        resources=resources,
+        properties=properties,
+        goodies=goodies,
+      }
+    end
+  end
+  return nil
+end
+function afm.setfeatures(tfmdata,features)
+  local okay=constructors.initializefeatures("afm",tfmdata,features,trace_features,report_afm)
+  if okay then
+    return constructors.collectprocessors("afm",tfmdata,features,trace_features,report_afm)
+  else
+    return {} 
+  end
+end
+local function addtables(data)
+  local resources=data.resources
+  local lookuptags=resources.lookuptags
+  local unicodes=resources.unicodes
+  if not lookuptags then
+    lookuptags={}
+    resources.lookuptags=lookuptags
+  end
+  setmetatableindex(lookuptags,function(t,k)
+    local v=type(k)=="number" and ("lookup "..k) or k
+    t[k]=v
+    return v
+  end)
+  if not unicodes then
+    unicodes={}
+    resources.unicodes=unicodes
+    setmetatableindex(unicodes,function(t,k)
+      setmetatableindex(unicodes,nil)
+      for u,d in next,data.descriptions do
+        local n=d.name
+        if n then
+          t[n]=u
+        end
+      end
+      return rawget(t,k)
+    end)
+  end
+  constructors.addcoreunicodes(unicodes) 
+end
+local function afmtotfm(specification)
+  local afmname=specification.filename or specification.name
+  if specification.forced=="afm" or specification.format=="afm" then 
+    if trace_loading then
+      report_afm("forcing afm format for %a",afmname)
+    end
+  else
+    local tfmname=findbinfile(afmname,"ofm") or ""
+    if tfmname~="" then
+      if trace_loading then
+        report_afm("fallback from afm to tfm for %a",afmname)
+      end
+      return 
+    end
+  end
+  if afmname~="" then
+    local features=constructors.checkedfeatures("afm",specification.features.normal)
+    specification.features.normal=features
+    constructors.hashinstance(specification,true)
+    specification=definers.resolve(specification) 
+    local cache_id=specification.hash
+    local tfmdata=containers.read(constructors.cache,cache_id) 
+    if not tfmdata then
+      local rawdata=afm.load(afmname)
+      if rawdata and next(rawdata) then
+        addtables(rawdata)
+        adddimensions(rawdata)
+        tfmdata=copytotfm(rawdata)
+        if tfmdata and next(tfmdata) then
+          local shared=tfmdata.shared
+          if not shared then
+            shared={}
+            tfmdata.shared=shared
+          end
+          shared.rawdata=rawdata
+          shared.dynamics={}
+          tfmdata.changed={}
+          shared.features=features
+          shared.processes=afm.setfeatures(tfmdata,features)
+        end
+      elseif trace_loading then
+        report_afm("no (valid) afm file found with name %a",afmname)
+      end
+      tfmdata=containers.write(constructors.cache,cache_id,tfmdata)
+    end
+    return tfmdata
+  end
+end
+local function read_from_afm(specification)
+  local tfmdata=afmtotfm(specification)
+  if tfmdata then
+    tfmdata.properties.name=specification.name
+    tfmdata=constructors.scale(tfmdata,specification)
+    local allfeatures=tfmdata.shared.features or specification.features.normal
+    constructors.applymanipulators("afm",tfmdata,allfeatures,trace_features,report_afm)
+    fonts.loggers.register(tfmdata,'afm',specification)
+  end
+  return tfmdata
+end
+registerafmfeature {
+  name="mode",
+  description="mode",
+  initializers={
+    base=otf.modeinitializer,
+    node=otf.modeinitializer,
+  }
+}
+registerafmfeature {
+  name="features",
+  description="features",
+  default=true,
+  initializers={
+    node=otf.nodemodeinitializer,
+    base=otf.basemodeinitializer,
+  },
+  processors={
+    node=otf.featuresprocessor,
+  }
+}
+fonts.formats.afm="type1"
+fonts.formats.pfb="type1"
+local function check_afm(specification,fullname)
+  local foundname=findbinfile(fullname,'afm') or "" 
+  if foundname=="" then
+    foundname=fonts.names.getfilename(fullname,"afm") or ""
+  end
+  if foundname=="" and afm.autoprefixed then
+    local encoding,shortname=match(fullname,"^(.-)%-(.*)$") 
+    if encoding and shortname and fonts.encodings.known[encoding] then
+      shortname=findbinfile(shortname,'afm') or "" 
+      if shortname~="" then
+        foundname=shortname
+        if trace_defining then
+          report_afm("stripping encoding prefix from filename %a",afmname)
+        end
+      end
+    end
+  end
+  if foundname~="" then
+    specification.filename=foundname
+    specification.format="afm"
+    return read_from_afm(specification)
+  end
+end
+function readers.afm(specification,method)
+  local fullname=specification.filename or ""
+  local tfmdata=nil
+  if fullname=="" then
+    local forced=specification.forced or ""
+    if forced~="" then
+      tfmdata=check_afm(specification,specification.name.."."..forced)
+    end
+    if not tfmdata then
+      local check_tfm=readers.check_tfm
+      method=(check_tfm and (method or definers.method or "afm or tfm")) or "afm"
+      if method=="tfm" then
+        tfmdata=check_tfm(specification,specification.name)
+      elseif method=="afm" then
+        tfmdata=check_afm(specification,specification.name)
+      elseif method=="tfm or afm" then
+        tfmdata=check_tfm(specification,specification.name) or check_afm(specification,specification.name)
+      else 
+        tfmdata=check_afm(specification,specification.name) or check_tfm(specification,specification.name)
+      end
+    end
+  else
+    tfmdata=check_afm(specification,fullname)
+  end
+  return tfmdata
+end
+function readers.pfb(specification,method) 
+  local original=specification.specification
+  if trace_defining then
+    report_afm("using afm reader for %a",original)
+  end
+  specification.forced="afm"
+  local function swap(name)
+    local value=specification[swap]
+    if value then
+      specification[swap]=gsub("%.pfb",".afm",1)
+    end
+  end
+  swap("filename")
+  swap("fullname")
+  swap("forcedname")
+  swap("specification")
+  return readers.afm(specification,method)
+end
+registerafmenhancer("unify names",enhance_unify_names)
+registerafmenhancer("add ligatures",enhance_add_ligatures)
+registerafmenhancer("add extra kerns",enhance_add_extra_kerns)
+registerafmenhancer("normalize features",enhance_normalize_features)
+registerafmenhancer("check extra features",otfenhancers.enhance)
+registerafmenhancer("fix names",enhance_fix_names)
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-afk']={
+  version=1.001,
+  comment="companion to font-lib.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files",
+  dataonly=true,
+}
+local allocate=utilities.storage.allocate
+fonts.handlers.afm.helpdata={
+  ligatures=allocate { 
+    ['f']={ 
+      { 'f','ff' },
+      { 'i','fi' },
+      { 'l','fl' },
+    },
+    ['ff']={
+      { 'i','ffi' }
+    },
+    ['fi']={
+      { 'i','fii' }
+    },
+    ['fl']={
+      { 'i','fli' }
+    },
+    ['s']={
+      { 't','st' }
+    },
+    ['i']={
+      { 'j','ij' }
+    },
+  },
+  texligatures=allocate {
+    ['quoteleft']={
+      { 'quoteleft','quotedblleft' }
+    },
+    ['quoteright']={
+      { 'quoteright','quotedblright' }
+    },
+    ['hyphen']={
+      { 'hyphen','endash' }
+    },
+    ['endash']={
+      { 'hyphen','emdash' }
+    }
+  },
+  leftkerned=allocate {
+    AEligature="A",aeligature="a",
+    OEligature="O",oeligature="o",
+    IJligature="I",ijligature="i",
+    AE="A",ae="a",
+    OE="O",oe="o",
+    IJ="I",ij="i",
+    Ssharp="S",ssharp="s",
+  },
+  rightkerned=allocate {
+    AEligature="E",aeligature="e",
+    OEligature="E",oeligature="e",
+    IJligature="J",ijligature="j",
+    AE="E",ae="e",
+    OE="E",oe="e",
+    IJ="J",ij="j",
+    Ssharp="S",ssharp="s",
+  },
+  bothkerned=allocate {
+    Acircumflex="A",acircumflex="a",
+    Ccircumflex="C",ccircumflex="c",
+    Ecircumflex="E",ecircumflex="e",
+    Gcircumflex="G",gcircumflex="g",
+    Hcircumflex="H",hcircumflex="h",
+    Icircumflex="I",icircumflex="i",
+    Jcircumflex="J",jcircumflex="j",
+    Ocircumflex="O",ocircumflex="o",
+    Scircumflex="S",scircumflex="s",
+    Ucircumflex="U",ucircumflex="u",
+    Wcircumflex="W",wcircumflex="w",
+    Ycircumflex="Y",ycircumflex="y",
+    Agrave="A",agrave="a",
+    Egrave="E",egrave="e",
+    Igrave="I",igrave="i",
+    Ograve="O",ograve="o",
+    Ugrave="U",ugrave="u",
+    Ygrave="Y",ygrave="y",
+    Atilde="A",atilde="a",
+    Itilde="I",itilde="i",
+    Otilde="O",otilde="o",
+    Utilde="U",utilde="u",
+    Ntilde="N",ntilde="n",
+    Adiaeresis="A",adiaeresis="a",Adieresis="A",adieresis="a",
+    Ediaeresis="E",ediaeresis="e",Edieresis="E",edieresis="e",
+    Idiaeresis="I",idiaeresis="i",Idieresis="I",idieresis="i",
+    Odiaeresis="O",odiaeresis="o",Odieresis="O",odieresis="o",
+    Udiaeresis="U",udiaeresis="u",Udieresis="U",udieresis="u",
+    Ydiaeresis="Y",ydiaeresis="y",Ydieresis="Y",ydieresis="y",
+    Aacute="A",aacute="a",
+    Cacute="C",cacute="c",
+    Eacute="E",eacute="e",
+    Iacute="I",iacute="i",
+    Lacute="L",lacute="l",
+    Nacute="N",nacute="n",
+    Oacute="O",oacute="o",
+    Racute="R",racute="r",
+    Sacute="S",sacute="s",
+    Uacute="U",uacute="u",
+    Yacute="Y",yacute="y",
+    Zacute="Z",zacute="z",
+    Dstroke="D",dstroke="d",
+    Hstroke="H",hstroke="h",
+    Tstroke="T",tstroke="t",
+    Cdotaccent="C",cdotaccent="c",
+    Edotaccent="E",edotaccent="e",
+    Gdotaccent="G",gdotaccent="g",
+    Idotaccent="I",idotaccent="i",
+    Zdotaccent="Z",zdotaccent="z",
+    Amacron="A",amacron="a",
+    Emacron="E",emacron="e",
+    Imacron="I",imacron="i",
+    Omacron="O",omacron="o",
+    Umacron="U",umacron="u",
+    Ccedilla="C",ccedilla="c",
+    Kcedilla="K",kcedilla="k",
+    Lcedilla="L",lcedilla="l",
+    Ncedilla="N",ncedilla="n",
+    Rcedilla="R",rcedilla="r",
+    Scedilla="S",scedilla="s",
+    Tcedilla="T",tcedilla="t",
+    Ohungarumlaut="O",ohungarumlaut="o",
+    Uhungarumlaut="U",uhungarumlaut="u",
+    Aogonek="A",aogonek="a",
+    Eogonek="E",eogonek="e",
+    Iogonek="I",iogonek="i",
+    Uogonek="U",uogonek="u",
+    Aring="A",aring="a",
+    Uring="U",uring="u",
+    Abreve="A",abreve="a",
+    Ebreve="E",ebreve="e",
+    Gbreve="G",gbreve="g",
+    Ibreve="I",ibreve="i",
+    Obreve="O",obreve="o",
+    Ubreve="U",ubreve="u",
+    Ccaron="C",ccaron="c",
+    Dcaron="D",dcaron="d",
+    Ecaron="E",ecaron="e",
+    Lcaron="L",lcaron="l",
+    Ncaron="N",ncaron="n",
+    Rcaron="R",rcaron="r",
+    Scaron="S",scaron="s",
+    Tcaron="T",tcaron="t",
+    Zcaron="Z",zcaron="z",
+    dotlessI="I",dotlessi="i",
+    dotlessJ="J",dotlessj="j",
+    AEligature="AE",aeligature="ae",AE="AE",ae="ae",
+    OEligature="OE",oeligature="oe",OE="OE",oe="oe",
+    IJligature="IJ",ijligature="ij",IJ="IJ",ij="ij",
+    Lstroke="L",lstroke="l",Lslash="L",lslash="l",
+    Ostroke="O",ostroke="o",Oslash="O",oslash="o",
+    Ssharp="SS",ssharp="ss",
+    Aumlaut="A",aumlaut="a",
+    Eumlaut="E",eumlaut="e",
+    Iumlaut="I",iumlaut="i",
+    Oumlaut="O",oumlaut="o",
+    Uumlaut="U",uumlaut="u",
+  }
+}
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-tfm']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local next,type=next,type
+local match,format=string.match,string.format
+local concat,sortedhash=table.concat,table.sortedhash
+local trace_defining=false trackers.register("fonts.defining",function(v) trace_defining=v end)
+local trace_features=false trackers.register("tfm.features",function(v) trace_features=v end)
+local report_defining=logs.reporter("fonts","defining")
+local report_tfm=logs.reporter("fonts","tfm loading")
+local findbinfile=resolvers.findbinfile
+local setmetatableindex=table.setmetatableindex
+local fonts=fonts
+local handlers=fonts.handlers
+local readers=fonts.readers
+local constructors=fonts.constructors
+local encodings=fonts.encodings
+local tfm=constructors.handlers.tfm
+tfm.version=1.000
+tfm.maxnestingdepth=5
+tfm.maxnestingsize=65536*1024
+local otf=fonts.handlers.otf
+local otfenhancers=otf.enhancers
+local tfmfeatures=constructors.features.tfm
+local registertfmfeature=tfmfeatures.register
+local tfmenhancers=constructors.enhancers.tfm
+local registertfmenhancer=tfmenhancers.register
+constructors.resolvevirtualtoo=false 
+fonts.formats.tfm="type1" 
+fonts.formats.ofm="type1"
+function tfm.setfeatures(tfmdata,features)
+  local okay=constructors.initializefeatures("tfm",tfmdata,features,trace_features,report_tfm)
+  if okay then
+    return constructors.collectprocessors("tfm",tfmdata,features,trace_features,report_tfm)
+  else
+    return {} 
+  end
+end
+local depth={}
+local function read_from_tfm(specification)
+  local filename=specification.filename
+  local size=specification.size
+  depth[filename]=(depth[filename] or 0)+1
+  if trace_defining then
+    report_defining("loading tfm file %a at size %s",filename,size)
+  end
+  local tfmdata=font.read_tfm(filename,size) 
+  if tfmdata then
+    local features=specification.features and specification.features.normal or {}
+    local features=constructors.checkedfeatures("tfm",features)
+    specification.features.normal=features
+    local newtfmdata=(depth[filename]==1) and tfm.reencode(tfmdata,specification)
+    if newtfmdata then
+       tfmdata=newtfmdata
+    end
+    local resources=tfmdata.resources or {}
+    local properties=tfmdata.properties or {}
+    local parameters=tfmdata.parameters or {}
+    local shared=tfmdata.shared   or {}
+    shared.features=features
+    shared.resources=resources
+    properties.name=tfmdata.name      
+    properties.fontname=tfmdata.fontname    
+    properties.psname=tfmdata.psname     
+    properties.fullname=tfmdata.fullname    
+    properties.filename=specification.filename 
+    properties.format=fonts.formats.tfm
+    tfmdata.properties=properties
+    tfmdata.resources=resources
+    tfmdata.parameters=parameters
+    tfmdata.shared=shared
+    shared.rawdata={ resources=resources }
+    shared.features=features
+    if newtfmdata then
+      if not resources.marks then
+        resources.marks={}
+      end
+      if not resources.sequences then
+        resources.sequences={}
+      end
+      if not resources.features then
+        resources.features={
+          gsub={},
+          gpos={},
+        }
+      end
+      if not tfmdata.changed then
+        tfmdata.changed={}
+      end
+      if not tfmdata.descriptions then
+        tfmdata.descriptions=tfmdata.characters
+      end
+      otf.readers.addunicodetable(tfmdata)
+      tfmenhancers.apply(tfmdata,filename)
+      constructors.applymanipulators("tfm",tfmdata,features,trace_features,report_tfm)
+      otf.readers.unifymissing(tfmdata)
+      fonts.mappings.addtounicode(tfmdata,filename)
+      tfmdata.tounicode=1
+      local tounicode=fonts.mappings.tounicode
+      for unicode,v in next,tfmdata.characters do
+        local u=v.unicode
+        if u then
+          v.tounicode=tounicode(u)
+        end
+      end
+      if tfmdata.usedbitmap then
+        tfm.addtounicode(tfmdata)
+      end
+    end
+    shared.processes=next(features) and tfm.setfeatures(tfmdata,features) or nil
+    parameters.factor=1 
+    parameters.size=size
+    parameters.slant=parameters.slant     or parameters[1] or 0
+    parameters.space=parameters.space     or parameters[2] or 0
+    parameters.space_stretch=parameters.space_stretch or parameters[3] or 0
+    parameters.space_shrink=parameters.space_shrink  or parameters[4] or 0
+    parameters.x_height=parameters.x_height    or parameters[5] or 0
+    parameters.quad=parameters.quad      or parameters[6] or 0
+    parameters.extra_space=parameters.extra_space  or parameters[7] or 0
+    constructors.enhanceparameters(parameters)
+    properties.private=properties.private or tfmdata.private or privateoffset
+    if newtfmdata then
+    elseif constructors.resolvevirtualtoo then
+      fonts.loggers.register(tfmdata,file.suffix(filename),specification) 
+      local vfname=findbinfile(specification.name,'ovf')
+      if vfname and vfname~="" then
+        local vfdata=font.read_vf(vfname,size) 
+        if vfdata then
+          local chars=tfmdata.characters
+          for k,v in next,vfdata.characters do
+            chars[k].commands=v.commands
+          end
+          properties.virtualized=true
+          tfmdata.fonts=vfdata.fonts
+          tfmdata.type="virtual" 
+          local fontlist=vfdata.fonts
+          local name=file.nameonly(filename)
+          for i=1,#fontlist do
+            local n=fontlist[i].name
+            local s=fontlist[i].size
+            local d=depth[filename]
+            s=constructors.scaled(s,vfdata.designsize)
+            if d>tfm.maxnestingdepth then
+              report_defining("too deeply nested virtual font %a with size %a, max nesting depth %s",n,s,tfm.maxnestingdepth)
+              fontlist[i]={ id=0 }
+            elseif (d>1) and (s>tfm.maxnestingsize) then
+              report_defining("virtual font %a exceeds size %s",n,s)
+              fontlist[i]={ id=0 }
+            else
+              local t,id=fonts.constructors.readanddefine(n,s)
+              fontlist[i]={ id=id }
+            end
+          end
+        end
+      end
+    end
+    properties.haskerns=true
+    properties.hasligatures=true
+    resources.unicodes={}
+    resources.lookuptags={}
+    depth[filename]=depth[filename]-1
+    return tfmdata
+  else
+    depth[filename]=depth[filename]-1
+  end
+end
+local function check_tfm(specification,fullname) 
+  local foundname=findbinfile(fullname,'tfm') or ""
+  if foundname=="" then
+    foundname=findbinfile(fullname,'ofm') or "" 
+  end
+  if foundname=="" then
+    foundname=fonts.names.getfilename(fullname,"tfm") or ""
+  end
+  if foundname~="" then
+    specification.filename=foundname
+    specification.format="ofm"
+    return read_from_tfm(specification)
+  elseif trace_defining then
+    report_defining("loading tfm with name %a fails",specification.name)
+  end
+end
+readers.check_tfm=check_tfm
+function readers.tfm(specification)
+  local fullname=specification.filename or ""
+  if fullname=="" then
+    local forced=specification.forced or ""
+    if forced~="" then
+      fullname=specification.name.."."..forced
+    else
+      fullname=specification.name
+    end
+  end
+  return check_tfm(specification,fullname)
+end
+readers.ofm=readers.tfm
+do
+  local outfiles={}
+  local tfmcache=table.setmetatableindex(function(t,tfmdata)
+    local id=font.define(tfmdata)
+    t[tfmdata]=id
+    return id
+  end)
+  local encdone=table.setmetatableindex("table")
+  function tfm.reencode(tfmdata,specification)
+    local features=specification.features
+    if not features then
+      return
+    end
+    local features=features.normal
+    if not features then
+      return
+    end
+    local tfmfile=file.basename(tfmdata.name)
+    local encfile=features.reencode 
+    local pfbfile=features.pfbfile 
+    local bitmap=features.bitmap  
+    if not encfile then
+      return
+    end
+    local pfbfile=outfiles[tfmfile]
+    if pfbfile==nil then
+      if bitmap then
+        pfbfile=false
+      elseif type(pfbfile)~="string" then
+        pfbfile=tfmfile
+      end
+      if type(pfbfile)=="string" then
+        pfbfile=file.addsuffix(pfbfile,"pfb")
+        report_tfm("using type1 shapes from %a for %a",pfbfile,tfmfile)
+      else
+        report_tfm("using bitmap shapes for %a",tfmfile)
+        pfbfile=false 
+      end
+      outfiles[tfmfile]=pfbfile
+    end
+    local encoding=false
+    local vector=false
+    if type(pfbfile)=="string" then
+      local pfb=fonts.constructors.handlers.pfb
+      if pfb and pfb.loadvector then
+        local v,e=pfb.loadvector(pfbfile)
+        if v then
+          vector=v
+        end
+        if e then
+          encoding=e
+        end
+      end
+    end
+    if type(encfile)=="string" and encfile~="auto" then
+      encoding=fonts.encodings.load(file.addsuffix(encfile,"enc"))
+      if encoding then
+        encoding=encoding.vector
+      end
+    end
+    if not encoding then
+      report_tfm("bad encoding for %a, quitting",tfmfile)
+      return
+    end
+    local unicoding=fonts.encodings.agl and fonts.encodings.agl.unicodes
+    local virtualid=tfmcache[tfmdata]
+    local tfmdata=table.copy(tfmdata) 
+    local characters={}
+    local originals=tfmdata.characters
+    local indices={}
+    local parentfont={ "font",1 }
+    local private=tfmdata or fonts.constructors.privateoffset
+    local reported=encdone[tfmfile][encfile]
+    local backmap=vector and table.swapped(vector)
+    local done={} 
+    for index,name in sortedhash(encoding) do 
+      local unicode=unicoding[name]
+      local original=originals[index]
+      if original then
+        if unicode then
+          original.unicode=unicode
+        else
+          unicode=private
+          private=private+1
+          if not reported then
+            report_tfm("glyph %a in font %a with encoding %a gets unicode %U",name,tfmfile,encfile,unicode)
+          end
+        end
+        characters[unicode]=original
+        indices[index]=unicode
+        original.name=name 
+        if backmap then
+          original.index=backmap[name]
+        else 
+          original.commands={ parentfont,{ "char",index } }
+          original.oindex=index
+        end
+        done[name]=true
+      elseif not done[name] then
+        report_tfm("bad index %a in font %a with name %a",index,tfmfile,name)
+      end
+    end
+    encdone[tfmfile][encfile]=true
+    for k,v in next,characters do
+      local kerns=v.kerns
+      if kerns then
+        local t={}
+        for k,v in next,kerns do
+          local i=indices[k]
+          if i then
+            t[i]=v
+          end
+        end
+        v.kerns=next(t) and t or nil
+      end
+      local ligatures=v.ligatures
+      if ligatures then
+        local t={}
+        for k,v in next,ligatures do
+          local i=indices[k]
+          if i then
+            t[i]=v
+            v.char=indices[v.char]
+          end
+        end
+        v.ligatures=next(t) and t or nil
+      end
+    end
+    tfmdata.fonts={ { id=virtualid } }
+    tfmdata.characters=characters
+    tfmdata.fullname=tfmdata.fullname or tfmdata.name
+    tfmdata.psname=file.nameonly(pfbfile or tfmdata.name)
+    tfmdata.filename=pfbfile
+    tfmdata.encodingbytes=2
+    tfmdata.format="type1"
+    tfmdata.tounicode=1
+    tfmdata.embedding="subset"
+    tfmdata.usedbitmap=bitmap and virtualid
+    tfmdata.private=private
+    return tfmdata
+  end
+end
+do
+  local template=[[
+/CIDInit /ProcSet findresource begin
+  12 dict begin
+  begincmap
+    /CIDSystemInfo << /Registry (TeX) /Ordering (bitmap-%s) /Supplement 0 >> def
+    /CMapName /TeX-bitmap-%s def
+    /CMapType 2 def
+    1 begincodespacerange
+      <00> <FF>
+    endcodespacerange
+    %s beginbfchar
+%s
+    endbfchar
+  endcmap
+CMapName currentdict /CMap defineresource pop end
+end
+end
+]]
+  local flushstreamobject=lpdf and lpdf.flushstreamobject
+  local setfontattributes=pdf.setfontattributes
+  if not flushstreamobject then
+    flushstreamobject=function(data)
+      return pdf.obj {
+        immediate=true,
+        type="stream",
+        string=data,
+      }
+    end
+  end
+  if not setfontattributes then
+    setfontattributes=function(id,data)
+      print(format("your luatex is too old so no tounicode bitmap font%i",id))
+    end
+  end
+  function tfm.addtounicode(tfmdata)
+    local id=tfmdata.usedbitmap
+    local map={}
+    local char={} 
+    for k,v in next,tfmdata.characters do
+      local index=v.oindex
+      local tounicode=v.tounicode
+      if index and tounicode then
+        map[index]=tounicode
+      end
+    end
+    for k,v in sortedhash(map) do
+      char[#char+1]=format("<%02X> <%s>",k,v)
+    end
+    char=concat(char,"\n")
+    local stream=format(template,id,id,#char,char)
+    local reference=flushstreamobject(stream,nil,true)
+    setfontattributes(id,format("/ToUnicode %i 0 R",reference))
+  end
+end
+do
+  local everywhere={ ["*"]={ ["*"]=true } } 
+  local noflags={ false,false,false,false }
+  local function enhance_normalize_features(data)
+    local ligatures=setmetatableindex("table")
+    local kerns=setmetatableindex("table")
+    local characters=data.characters
+    for u,c in next,characters do
+      local l=c.ligatures
+      local k=c.kerns
+      if l then
+        ligatures[u]=l
+        for u,v in next,l do
+          l[u]={ ligature=v.char }
+        end
+        c.ligatures=nil
+      end
+      if k then
+        kerns[u]=k
+        for u,v in next,k do
+          k[u]=v 
+        end
+        c.kerns=nil
+      end
+    end
+    for u,l in next,ligatures do
+      for k,v in next,l do
+        local vl=v.ligature
+        local dl=ligatures[vl]
+        if dl then
+          for kk,vv in next,dl do
+            v[kk]=vv 
+          end
+        end
+      end
+    end
+    local features={
+      gpos={},
+      gsub={},
+    }
+    local sequences={
+    }
+    if next(ligatures) then
+      features.gsub.liga=everywhere
+      data.properties.hasligatures=true
+      sequences[#sequences+1]={
+        features={
+          liga=everywhere,
+        },
+        flags=noflags,
+        name="s_s_0",
+        nofsteps=1,
+        order={ "liga" },
+        type="gsub_ligature",
+        steps={
+          {
+            coverage=ligatures,
+          },
+        },
+      }
+    end
+    if next(kerns) then
+      features.gpos.kern=everywhere
+      data.properties.haskerns=true
+      sequences[#sequences+1]={
+        features={
+          kern=everywhere,
+        },
+        flags=noflags,
+        name="p_s_0",
+        nofsteps=1,
+        order={ "kern" },
+        type="gpos_pair",
+        steps={
+          {
+            format="kern",
+            coverage=kerns,
+          },
+        },
+      }
+    end
+    data.resources.features=features
+    data.resources.sequences=sequences
+    data.shared.resources=data.shared.resources or resources
+  end
+  registertfmenhancer("normalize features",enhance_normalize_features)
+  registertfmenhancer("check extra features",otfenhancers.enhance)
+end
+registertfmfeature {
+  name="mode",
+  description="mode",
+  initializers={
+    base=otf.modeinitializer,
+    node=otf.modeinitializer,
+  }
+}
+registertfmfeature {
+  name="features",
+  description="features",
+  default=true,
+  initializers={
+    base=otf.basemodeinitializer,
+    node=otf.nodemodeinitializer,
+  },
+  processors={
+    node=otf.featuresprocessor,
+  }
+}
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-lua']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local trace_defining=false trackers.register("fonts.defining",function(v) trace_defining=v end)
+local report_lua=logs.reporter("fonts","lua loading")
+local fonts=fonts
+local readers=fonts.readers
+fonts.formats.lua="lua"
+local function check_lua(specification,fullname)
+  local fullname=resolvers.findfile(fullname) or ""
+  if fullname~="" then
+    local loader=loadfile(fullname)
+    loader=loader and loader()
+    return loader and loader(specification)
+  end
+end
+readers.check_lua=check_lua
+function readers.lua(specification)
+  local original=specification.specification
+  if trace_defining then
+    report_lua("using lua reader for %a",original)
+  end
+  local fullname=specification.filename or ""
+  if fullname=="" then
+    local forced=specification.forced or ""
+    if forced~="" then
+      fullname=specification.name.."."..forced
+    else
+      fullname=specification.name
+    end
+  end
+  return check_lua(specification,fullname)
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-def']={
+  version=1.001,
+  comment="companion to font-ini.mkiv",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+local lower,gsub=string.lower,string.gsub
+local tostring,next=tostring,next
+local lpegmatch=lpeg.match
+local suffixonly,removesuffix,basename=file.suffix,file.removesuffix,file.basename
+local formatters=string.formatters
+local sortedhash,sortedkeys=table.sortedhash,table.sortedkeys
+local allocate=utilities.storage.allocate
+local trace_defining=false trackers .register("fonts.defining",function(v) trace_defining=v end)
+local directive_embedall=false directives.register("fonts.embedall",function(v) directive_embedall=v end)
+trackers.register("fonts.loading","fonts.defining","otf.loading","afm.loading","tfm.loading")
+local report_defining=logs.reporter("fonts","defining")
+local fonts=fonts
+local fontdata=fonts.hashes.identifiers
+local readers=fonts.readers
+local definers=fonts.definers
+local specifiers=fonts.specifiers
+local constructors=fonts.constructors
+local fontgoodies=fonts.goodies
+readers.sequence=allocate { 'otf','ttf','afm','tfm','lua' } 
+local variants=allocate()
+specifiers.variants=variants
+definers.methods=definers.methods or {}
+local internalized=allocate() 
+local lastdefined=nil 
+local loadedfonts=constructors.loadedfonts
+local designsizes=constructors.designsizes
+local resolvefile=fontgoodies and fontgoodies.filenames and fontgoodies.filenames.resolve or function(s) return s end
+local splitter,splitspecifiers=nil,"" 
+local P,C,S,Cc=lpeg.P,lpeg.C,lpeg.S,lpeg.Cc
+local left=P("(")
+local right=P(")")
+local colon=P(":")
+local space=P(" ")
+definers.defaultlookup="file"
+local prefixpattern=P(false)
+local function addspecifier(symbol)
+  splitspecifiers=splitspecifiers..symbol
+  local method=S(splitspecifiers)
+  local lookup=C(prefixpattern)*colon
+  local sub=left*C(P(1-left-right-method)^1)*right
+  local specification=C(method)*C(P(1)^1)
+  local name=C((1-sub-specification)^1)
+  splitter=P((lookup+Cc(""))*name*(sub+Cc(""))*(specification+Cc("")))
+end
+local function addlookup(str,default)
+  prefixpattern=prefixpattern+P(str)
+end
+definers.addlookup=addlookup
+addlookup("file")
+addlookup("name")
+addlookup("spec")
+local function getspecification(str)
+  return lpegmatch(splitter,str or "") 
+end
+definers.getspecification=getspecification
+function definers.registersplit(symbol,action,verbosename)
+  addspecifier(symbol)
+  variants[symbol]=action
+  if verbosename then
+    variants[verbosename]=action
+  end
+end
+local function makespecification(specification,lookup,name,sub,method,detail,size)
+  size=size or 655360
+  if not lookup or lookup=="" then
+    lookup=definers.defaultlookup
+  end
+  if trace_defining then
+    report_defining("specification %a, lookup %a, name %a, sub %a, method %a, detail %a",
+      specification,lookup,name,sub,method,detail)
+  end
+  local t={
+    lookup=lookup,
+    specification=specification,
+    size=size,
+    name=name,
+    sub=sub,
+    method=method,
+    detail=detail,
+    resolved="",
+    forced="",
+    features={},
+  }
+  return t
+end
+definers.makespecification=makespecification
+function definers.analyze(specification,size)
+  local lookup,name,sub,method,detail=getspecification(specification or "")
+  return makespecification(specification,lookup,name,sub,method,detail,size)
+end
+definers.resolvers=definers.resolvers or {}
+local resolvers=definers.resolvers
+function resolvers.file(specification)
+  local name=resolvefile(specification.name) 
+  local suffix=lower(suffixonly(name))
+  if fonts.formats[suffix] then
+    specification.forced=suffix
+    specification.forcedname=name
+    specification.name=removesuffix(name)
+  else
+    specification.name=name 
+  end
+end
+function resolvers.name(specification)
+  local resolve=fonts.names.resolve
+  if resolve then
+    local resolved,sub,subindex,instance=resolve(specification.name,specification.sub,specification) 
+    if resolved then
+      specification.resolved=resolved
+      specification.sub=sub
+      specification.subindex=subindex
+      if instance then
+        specification.instance=instance
+        local features=specification.features
+        if not features then
+          features={}
+          specification.features=features
+        end
+        local normal=features.normal
+        if not normal then
+          normal={}
+          features.normal=normal
+        end
+        normal.instance=instance
+        if not callbacks.supported.glyph_stream_provider then
+          normal.variableshapes=true 
+        end
+      end
+      local suffix=lower(suffixonly(resolved))
+      if fonts.formats[suffix] then
+        specification.forced=suffix
+        specification.forcedname=resolved
+        specification.name=removesuffix(resolved)
+      else
+        specification.name=resolved
+      end
+    end
+  else
+    resolvers.file(specification)
+  end
+end
+function resolvers.spec(specification)
+  local resolvespec=fonts.names.resolvespec
+  if resolvespec then
+    local resolved,sub,subindex=resolvespec(specification.name,specification.sub,specification) 
+    if resolved then
+      specification.resolved=resolved
+      specification.sub=sub
+      specification.subindex=subindex
+      specification.forced=lower(suffixonly(resolved))
+      specification.forcedname=resolved
+      specification.name=removesuffix(resolved)
+    end
+  else
+    resolvers.name(specification)
+  end
+end
+function definers.resolve(specification)
+  if not specification.resolved or specification.resolved=="" then 
+    local r=resolvers[specification.lookup]
+    if r then
+      r(specification)
+    end
+  end
+  if specification.forced=="" then
+    specification.forced=nil
+    specification.forcedname=nil
+  end
+  specification.hash=lower(specification.name..' @ '..constructors.hashfeatures(specification))
+  if specification.sub and specification.sub~="" then
+    specification.hash=specification.sub..' @ '..specification.hash
+  end
+  return specification
+end
+function definers.applypostprocessors(tfmdata)
+  local postprocessors=tfmdata.postprocessors
+  if postprocessors then
+    local properties=tfmdata.properties
+    for i=1,#postprocessors do
+      local extrahash=postprocessors[i](tfmdata) 
+      if type(extrahash)=="string" and extrahash~="" then
+        extrahash=gsub(lower(extrahash),"[^a-z]","-")
+        properties.fullname=formatters["%s-%s"](properties.fullname,extrahash)
+      end
+    end
+  end
+  return tfmdata
+end
+local function checkembedding(tfmdata)
+  local properties=tfmdata.properties
+  local embedding
+  if directive_embedall then
+    embedding="full"
+  elseif properties and properties.filename and constructors.dontembed[properties.filename] then
+    embedding="no"
+  else
+    embedding="subset"
+  end
+  if properties then
+    properties.embedding=embedding
+  else
+    tfmdata.properties={ embedding=embedding }
+  end
+  tfmdata.embedding=embedding
+end
+local function checkfeatures(tfmdata)
+  local resources=tfmdata.resources
+  local shared=tfmdata.shared
+  if resources and shared then
+    local features=resources.features
+    local usedfeatures=shared.features
+    if features and usedfeatures then
+      local usedlanguage=usedfeatures.language or "dflt"
+      local usedscript=usedfeatures.script or "dflt"
+      local function check(what)
+        if what then
+          local foundlanguages={}
+          for feature,scripts in next,what do
+            if usedscript=="auto" or scripts["*"] then
+            elseif not scripts[usedscript] then
+            else
+              for script,languages in next,scripts do
+                if languages["*"] then
+                elseif not languages[usedlanguage] then
+                  report_defining("font %!font:name!, feature %a, script %a, no language %a",
+                    tfmdata,feature,script,usedlanguage)
+                end
+              end
+            end
+            for script,languages in next,scripts do
+              for language in next,languages do
+                foundlanguages[language]=true
+              end
+            end
+          end
+          if false then
+            foundlanguages["*"]=nil
+            foundlanguages=sortedkeys(foundlanguages)
+            for feature,scripts in sortedhash(what) do
+              for script,languages in next,scripts do
+                if not languages["*"] then
+                  for i=1,#foundlanguages do
+                    local language=foundlanguages[i]
+                    if not languages[language] then
+                      report_defining("font %!font:name!, feature %a, script %a, no language %a",
+                        tfmdata,feature,script,language)
+                    end
+                  end
+                end
+              end
+            end
+          end
+        end
+      end
+      check(features.gsub)
+      check(features.gpos)
+    end
+  end
+end
+function definers.loadfont(specification)
+  local hash=constructors.hashinstance(specification)
+  local tfmdata=loadedfonts[hash] 
+  if not tfmdata then
+    local forced=specification.forced or ""
+    if forced~="" then
+      local reader=readers[lower(forced)] 
+      tfmdata=reader and reader(specification)
+      if not tfmdata then
+        report_defining("forced type %a of %a not found",forced,specification.name)
+      end
+    else
+      local sequence=readers.sequence 
+      for s=1,#sequence do
+        local reader=sequence[s]
+        if readers[reader] then 
+          if trace_defining then
+            report_defining("trying (reader sequence driven) type %a for %a with file %a",reader,specification.name,specification.filename)
+          end
+          tfmdata=readers[reader](specification)
+          if tfmdata then
+            break
+          else
+            specification.filename=nil
+          end
+        end
+      end
+    end
+    if tfmdata then
+      tfmdata=definers.applypostprocessors(tfmdata)
+      checkembedding(tfmdata) 
+      loadedfonts[hash]=tfmdata
+      designsizes[specification.hash]=tfmdata.parameters.designsize
+      checkfeatures(tfmdata)
+    end
+  end
+  if not tfmdata then
+    report_defining("font with asked name %a is not found using lookup %a",specification.name,specification.lookup)
+  end
+  return tfmdata
+end
+function constructors.readanddefine(name,size) 
+  local specification=definers.analyze(name,size)
+  local method=specification.method
+  if method and variants[method] then
+    specification=variants[method](specification)
+  end
+  specification=definers.resolve(specification)
+  local hash=constructors.hashinstance(specification)
+  local id=definers.registered(hash)
+  if not id then
+    local tfmdata=definers.loadfont(specification)
+    if tfmdata then
+      tfmdata.properties.hash=hash
+      id=font.define(tfmdata)
+      definers.register(tfmdata,id)
+    else
+      id=0 
+    end
+  end
+  return fontdata[id],id
+end
+function definers.current() 
+  return lastdefined
+end
+function definers.registered(hash)
+  local id=internalized[hash]
+  return id,id and fontdata[id]
+end
+function definers.register(tfmdata,id)
+  if tfmdata and id then
+    local hash=tfmdata.properties.hash
+    if not hash then
+      report_defining("registering font, id %a, name %a, invalid hash",id,tfmdata.properties.filename or "?")
+    elseif not internalized[hash] then
+      internalized[hash]=id
+      if trace_defining then
+        report_defining("registering font, id %s, hash %a",id,hash)
+      end
+      fontdata[id]=tfmdata
+    end
+  end
+end
+function definers.read(specification,size,id) 
+  statistics.starttiming(fonts)
+  if type(specification)=="string" then
+    specification=definers.analyze(specification,size)
+  end
+  local method=specification.method
+  if method and variants[method] then
+    specification=variants[method](specification)
+  end
+  specification=definers.resolve(specification)
+  local hash=constructors.hashinstance(specification)
+  local tfmdata=definers.registered(hash) 
+  if tfmdata then
+    if trace_defining then
+      report_defining("already hashed: %s",hash)
+    end
+  else
+    tfmdata=definers.loadfont(specification) 
+    if tfmdata then
+      if trace_defining then
+        report_defining("loaded and hashed: %s",hash)
+      end
+      tfmdata.properties.hash=hash
+      if id then
+        definers.register(tfmdata,id)
+      end
+    else
+      if trace_defining then
+        report_defining("not loaded and hashed: %s",hash)
+      end
+    end
+  end
+  lastdefined=tfmdata or id 
+  if not tfmdata then 
+    report_defining("unknown font %a, loading aborted",specification.name)
+  elseif trace_defining and type(tfmdata)=="table" then
+    local properties=tfmdata.properties or {}
+    local parameters=tfmdata.parameters or {}
+    report_defining("using %a font with id %a, name %a, size %a, bytes %a, encoding %a, fullname %a, filename %a",
+      properties.format or "unknown",id,properties.name,parameters.size,properties.encodingbytes,
+      properties.encodingname,properties.fullname,basename(properties.filename))
+  end
+  statistics.stoptiming(fonts)
+  return tfmdata
+end
+function font.getfont(id)
+  return fontdata[id] 
+end
+callbacks.register('define_font',definers.read,"definition of fonts (tfmdata preparation)")
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['luatex-fonts-def']={
+  version=1.001,
+  comment="companion to luatex-*.tex",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+if context then
+  texio.write_nl("fatal error: this module is not for context")
+  os.exit()
+end
+local fonts=fonts
+fonts.constructors.namemode="specification"
+function fonts.definers.getspecification(str)
+  return "",str,"",":",str
+end
+local list={}
+local function issome ()  list.lookup='name'     end 
+local function isfile ()  list.lookup='file'     end
+local function isname ()  list.lookup='name'     end
+local function thename(s)  list.name=s        end
+local function issub (v)  list.sub=v        end
+local function iscrap (s)  list.crap=string.lower(s) end
+local function iskey (k,v) list[k]=v        end
+local function istrue (s)  list[s]=true      end
+local function isfalse(s)  list[s]=false      end
+local P,S,R,C=lpeg.P,lpeg.S,lpeg.R,lpeg.C
+local spaces=P(" ")^0
+local namespec=(1-S("/:("))^0 
+local crapspec=spaces*P("/")*(((1-P(":"))^0)/iscrap)*spaces
+local filename_1=P("file:")/isfile*(namespec/thename)
+local filename_2=P("[")*P(true)/isname*(((1-P("]"))^0)/thename)*P("]")
+local fontname_1=P("name:")/isname*(namespec/thename)
+local fontname_2=P(true)/issome*(namespec/thename)
+local sometext=(R("az","AZ","09")+S("+-.{}"))^1
+local truevalue=P("+")*spaces*(sometext/istrue)
+local falsevalue=P("-")*spaces*(sometext/isfalse)
+local keyvalue=(C(sometext)*spaces*P("=")*spaces*C(sometext))/iskey
+local somevalue=sometext/istrue
+local subvalue=P("(")*(C(P(1-S("()"))^1)/issub)*P(")") 
+local option=spaces*(keyvalue+falsevalue+truevalue+somevalue)*spaces
+local options=P(":")*spaces*(P(";")^0*option)^0
+local pattern=(filename_1+filename_2+fontname_1+fontname_2)*subvalue^0*crapspec^0*options^0
+local function colonized(specification) 
+  list={}
+  lpeg.match(pattern,specification.specification)
+  list.crap=nil 
+  if list.name then
+    specification.name=list.name
+    list.name=nil
+  end
+  if list.lookup then
+    specification.lookup=list.lookup
+    list.lookup=nil
+  end
+  if list.sub then
+    specification.sub=list.sub
+    list.sub=nil
+  end
+  specification.features.normal=fonts.handlers.otf.features.normalize(list)
+  return specification
+end
+fonts.definers.registersplit(":",colonized,"cryptic")
+fonts.definers.registersplit("",colonized,"more cryptic") 
+function fonts.definers.applypostprocessors(tfmdata)
+  local postprocessors=tfmdata.postprocessors
+  if postprocessors then
+    for i=1,#postprocessors do
+      local extrahash=postprocessors[i](tfmdata) 
+      if type(extrahash)=="string" and extrahash~="" then
+        extrahash=string.gsub(lower(extrahash),"[^a-z]","-")
+        tfmdata.properties.fullname=format("%s-%s",tfmdata.properties.fullname,extrahash)
+      end
+    end
+  end
+  return tfmdata
+end
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['luatex-fonts-ext']={
+  version=1.001,
+  comment="companion to luatex-*.tex",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+if context then
+  texio.write_nl("fatal error: this module is not for context")
+  os.exit()
+end
+local fonts=fonts
+local otffeatures=fonts.constructors.features.otf
+local getprivate=fonts.constructors.getprivate
+local function initializeitlc(tfmdata,value)
+  if value then
+    local parameters=tfmdata.parameters
+    local italicangle=parameters.italicangle
+    if italicangle and italicangle~=0 then
+      local properties=tfmdata.properties
+      local factor=tonumber(value) or 1
+      properties.hasitalics=true
+      properties.autoitalicamount=factor*(parameters.uwidth or 40)/2
+    end
+  end
+end
+otffeatures.register {
+  name="itlc",
+  description="italic correction",
+  initializers={
+    base=initializeitlc,
+    node=initializeitlc,
+  }
+}
+local function initializeslant(tfmdata,value)
+  value=tonumber(value)
+  if not value then
+    value=0
+  elseif value>1 then
+    value=1
+  elseif value<-1 then
+    value=-1
+  end
+  tfmdata.parameters.slantfactor=value
+end
+otffeatures.register {
+  name="slant",
+  description="slant glyphs",
+  initializers={
+    base=initializeslant,
+    node=initializeslant,
+  }
+}
+local function initializeextend(tfmdata,value)
+  value=tonumber(value)
+  if not value then
+    value=0
+  elseif value>10 then
+    value=10
+  elseif value<-10 then
+    value=-10
+  end
+  tfmdata.parameters.extendfactor=value
+end
+otffeatures.register {
+  name="extend",
+  description="scale glyphs horizontally",
+  initializers={
+    base=initializeextend,
+    node=initializeextend,
+  }
+}
+fonts.protrusions=fonts.protrusions    or {}
+fonts.protrusions.setups=fonts.protrusions.setups or {}
+local setups=fonts.protrusions.setups
+local function initializeprotrusion(tfmdata,value)
+  if value then
+    local setup=setups[value]
+    if setup then
+      local factor,left,right=setup.factor or 1,setup.left or 1,setup.right or 1
+      local emwidth=tfmdata.parameters.quad
+      tfmdata.parameters.protrusion={
+        auto=true,
+      }
+      for i,chr in next,tfmdata.characters do
+        local v,pl,pr=setup[i],nil,nil
+        if v then
+          pl,pr=v[1],v[2]
+        end
+        if pl and pl~=0 then chr.left_protruding=left*pl*factor end
+        if pr and pr~=0 then chr.right_protruding=right*pr*factor end
+      end
+    end
+  end
+end
+otffeatures.register {
+  name="protrusion",
+  description="shift characters into the left and or right margin",
+  initializers={
+    base=initializeprotrusion,
+    node=initializeprotrusion,
+  }
+}
+fonts.expansions=fonts.expansions    or {}
+fonts.expansions.setups=fonts.expansions.setups or {}
+local setups=fonts.expansions.setups
+local function initializeexpansion(tfmdata,value)
+  if value then
+    local setup=setups[value]
+    if setup then
+      local factor=setup.factor or 1
+      tfmdata.parameters.expansion={
+        stretch=10*(setup.stretch or 0),
+        shrink=10*(setup.shrink or 0),
+        step=10*(setup.step  or 0),
+        auto=true,
+      }
+      for i,chr in next,tfmdata.characters do
+        local v=setup[i]
+        if v and v~=0 then
+          chr.expansion_factor=v*factor
+        else 
+          chr.expansion_factor=factor
+        end
+      end
+    end
+  end
+end
+otffeatures.register {
+  name="expansion",
+  description="apply hz optimization",
+  initializers={
+    base=initializeexpansion,
+    node=initializeexpansion,
+  }
+}
+function fonts.loggers.onetimemessage() end
+local byte=string.byte
+fonts.expansions.setups['default']={
+  stretch=2,shrink=2,step=.5,factor=1,
+  [byte('A')]=0.5,[byte('B')]=0.7,[byte('C')]=0.7,[byte('D')]=0.5,[byte('E')]=0.7,
+  [byte('F')]=0.7,[byte('G')]=0.5,[byte('H')]=0.7,[byte('K')]=0.7,[byte('M')]=0.7,
+  [byte('N')]=0.7,[byte('O')]=0.5,[byte('P')]=0.7,[byte('Q')]=0.5,[byte('R')]=0.7,
+  [byte('S')]=0.7,[byte('U')]=0.7,[byte('W')]=0.7,[byte('Z')]=0.7,
+  [byte('a')]=0.7,[byte('b')]=0.7,[byte('c')]=0.7,[byte('d')]=0.7,[byte('e')]=0.7,
+  [byte('g')]=0.7,[byte('h')]=0.7,[byte('k')]=0.7,[byte('m')]=0.7,[byte('n')]=0.7,
+  [byte('o')]=0.7,[byte('p')]=0.7,[byte('q')]=0.7,[byte('s')]=0.7,[byte('u')]=0.7,
+  [byte('w')]=0.7,[byte('z')]=0.7,
+  [byte('2')]=0.7,[byte('3')]=0.7,[byte('6')]=0.7,[byte('8')]=0.7,[byte('9')]=0.7,
+}
+fonts.protrusions.setups['default']={
+  factor=1,left=1,right=1,
+  [0x002C]={ 0,1  },
+  [0x002E]={ 0,1  },
+  [0x003A]={ 0,1  },
+  [0x003B]={ 0,1  },
+  [0x002D]={ 0,1  },
+  [0x2013]={ 0,0.50 },
+  [0x2014]={ 0,0.33 },
+  [0x3001]={ 0,1  },
+  [0x3002]={ 0,1  },
+  [0x060C]={ 0,1  },
+  [0x061B]={ 0,1  },
+  [0x06D4]={ 0,1  },
+}
+fonts.handlers.otf.features.normalize=function(t)
+  if t.rand then
+    t.rand="random"
+  end
+  return t
+end
+function fonts.helpers.nametoslot(name)
+  local t=type(name)
+  if t=="string" then
+    local tfmdata=fonts.hashes.identifiers[currentfont()]
+    local shared=tfmdata and tfmdata.shared
+    local fntdata=shared and shared.rawdata
+    return fntdata and fntdata.resources.unicodes[name]
+  elseif t=="number" then
+    return n
+  end
+end
+fonts.encodings=fonts.encodings or {}
+local reencodings={}
+fonts.encodings.reencodings=reencodings
+local function specialreencode(tfmdata,value)
+  local encoding=value and reencodings[value]
+  if encoding then
+    local temp={}
+    local char=tfmdata.characters
+    for k,v in next,encoding do
+      temp[k]=char[v]
+    end
+    for k,v in next,temp do
+      char[k]=temp[k]
+    end
+    return string.format("reencoded:%s",value)
+  end
+end
+local function reencode(tfmdata,value)
+  tfmdata.postprocessors=tfmdata.postprocessors or {}
+  table.insert(tfmdata.postprocessors,
+    function(tfmdata)
+      return specialreencode(tfmdata,value)
+    end
+  )
+end
+otffeatures.register {
+  name="reencode",
+  description="reencode characters",
+  manipulators={
+    base=reencode,
+    node=reencode,
+  }
+}
+local function ignore(tfmdata,key,value)
+  if value then
+    tfmdata.mathparameters=nil
+  end
+end
+otffeatures.register {
+  name="ignoremathconstants",
+  description="ignore math constants table",
+  initializers={
+    base=ignore,
+    node=ignore,
+  }
+}
+local setmetatableindex=table.setmetatableindex
+local function additalictowidth(tfmdata,key,value)
+  local characters=tfmdata.characters
+  local additions={}
+  for unicode,old_c in next,characters do
+    local oldwidth=old_c.width
+    local olditalic=old_c.italic
+    if olditalic and olditalic~=0 then
+      local private=getprivate(tfmdata)
+      local new_c={
+        width=oldwidth+olditalic,
+        height=old_c.height,
+        depth=old_c.depth,
+        commands={
+          { "slot",1,private },
+          { "right",olditalic },
+        },
+      }
+      setmetatableindex(new_c,old_c)
+      characters[unicode]=new_c
+      additions[private]=old_c
+    end
+  end
+  for k,v in next,additions do
+    characters[k]=v
+  end
+end
+otffeatures.register {
+  name="italicwidths",
+  description="add italic to width",
+  manipulators={
+    base=additalictowidth,
+  }
+}
+
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+
+fonts.handlers.otf.addfeature {
+ ["dataset"]={
+ {
+  ["data"]={
+  ["À"]={ "A","̀" },
+  ["Á"]={ "A","́" },
+  ["Â"]={ "A","̂" },
+  ["Ã"]={ "A","̃" },
+  ["Ä"]={ "A","̈" },
+  ["Å"]={ "A","̊" },
+  ["Ç"]={ "C","̧" },
+  ["È"]={ "E","̀" },
+  ["É"]={ "E","́" },
+  ["Ê"]={ "E","̂" },
+  ["Ë"]={ "E","̈" },
+  ["Ì"]={ "I","̀" },
+  ["Í"]={ "I","́" },
+  ["Î"]={ "I","̂" },
+  ["Ï"]={ "I","̈" },
+  ["Ñ"]={ "N","̃" },
+  ["Ò"]={ "O","̀" },
+  ["Ó"]={ "O","́" },
+  ["Ô"]={ "O","̂" },
+  ["Õ"]={ "O","̃" },
+  ["Ö"]={ "O","̈" },
+  ["Ù"]={ "U","̀" },
+  ["Ú"]={ "U","́" },
+  ["Û"]={ "U","̂" },
+  ["Ü"]={ "U","̈" },
+  ["Ý"]={ "Y","́" },
+  ["à"]={ "a","̀" },
+  ["á"]={ "a","́" },
+  ["â"]={ "a","̂" },
+  ["ã"]={ "a","̃" },
+  ["ä"]={ "a","̈" },
+  ["å"]={ "a","̊" },
+  ["ç"]={ "c","̧" },
+  ["è"]={ "e","̀" },
+  ["é"]={ "e","́" },
+  ["ê"]={ "e","̂" },
+  ["ë"]={ "e","̈" },
+  ["ì"]={ "i","̀" },
+  ["í"]={ "i","́" },
+  ["î"]={ "i","̂" },
+  ["ï"]={ "i","̈" },
+  ["ñ"]={ "n","̃" },
+  ["ò"]={ "o","̀" },
+  ["ó"]={ "o","́" },
+  ["ô"]={ "o","̂" },
+  ["õ"]={ "o","̃" },
+  ["ö"]={ "o","̈" },
+  ["ù"]={ "u","̀" },
+  ["ú"]={ "u","́" },
+  ["û"]={ "u","̂" },
+  ["ü"]={ "u","̈" },
+  ["ý"]={ "y","́" },
+  ["ÿ"]={ "y","̈" },
+  ["Ā"]={ "A","̄" },
+  ["ā"]={ "a","̄" },
+  ["Ă"]={ "A","̆" },
+  ["ă"]={ "a","̆" },
+  ["Ą"]={ "A","̨" },
+  ["ą"]={ "a","̨" },
+  ["Ć"]={ "C","́" },
+  ["ć"]={ "c","́" },
+  ["Ĉ"]={ "C","̂" },
+  ["ĉ"]={ "c","̂" },
+  ["Ċ"]={ "C","̇" },
+  ["ċ"]={ "c","̇" },
+  ["Č"]={ "C","̌" },
+  ["č"]={ "c","̌" },
+  ["Ď"]={ "D","̌" },
+  ["ď"]={ "d","̌" },
+  ["Ē"]={ "E","̄" },
+  ["ē"]={ "e","̄" },
+  ["Ĕ"]={ "E","̆" },
+  ["ĕ"]={ "e","̆" },
+  ["Ė"]={ "E","̇" },
+  ["ė"]={ "e","̇" },
+  ["Ę"]={ "E","̨" },
+  ["ę"]={ "e","̨" },
+  ["Ě"]={ "E","̌" },
+  ["ě"]={ "e","̌" },
+  ["Ĝ"]={ "G","̂" },
+  ["ĝ"]={ "g","̂" },
+  ["Ğ"]={ "G","̆" },
+  ["ğ"]={ "g","̆" },
+  ["Ġ"]={ "G","̇" },
+  ["ġ"]={ "g","̇" },
+  ["Ģ"]={ "G","̧" },
+  ["ģ"]={ "g","̧" },
+  ["Ĥ"]={ "H","̂" },
+  ["ĥ"]={ "h","̂" },
+  ["Ĩ"]={ "I","̃" },
+  ["ĩ"]={ "i","̃" },
+  ["Ī"]={ "I","̄" },
+  ["ī"]={ "i","̄" },
+  ["Ĭ"]={ "I","̆" },
+  ["ĭ"]={ "i","̆" },
+  ["Į"]={ "I","̨" },
+  ["į"]={ "i","̨" },
+  ["İ"]={ "I","̇" },
+  ["Ĵ"]={ "J","̂" },
+  ["ĵ"]={ "j","̂" },
+  ["Ķ"]={ "K","̧" },
+  ["ķ"]={ "k","̧" },
+  ["Ĺ"]={ "L","́" },
+  ["ĺ"]={ "l","́" },
+  ["Ļ"]={ "L","̧" },
+  ["ļ"]={ "l","̧" },
+  ["Ľ"]={ "L","̌" },
+  ["ľ"]={ "l","̌" },
+  ["Ń"]={ "N","́" },
+  ["ń"]={ "n","́" },
+  ["Ņ"]={ "N","̧" },
+  ["ņ"]={ "n","̧" },
+  ["Ň"]={ "N","̌" },
+  ["ň"]={ "n","̌" },
+  ["Ō"]={ "O","̄" },
+  ["ō"]={ "o","̄" },
+  ["Ŏ"]={ "O","̆" },
+  ["ŏ"]={ "o","̆" },
+  ["Ő"]={ "O","̋" },
+  ["ő"]={ "o","̋" },
+  ["Ŕ"]={ "R","́" },
+  ["ŕ"]={ "r","́" },
+  ["Ŗ"]={ "R","̧" },
+  ["ŗ"]={ "r","̧" },
+  ["Ř"]={ "R","̌" },
+  ["ř"]={ "r","̌" },
+  ["Ś"]={ "S","́" },
+  ["ś"]={ "s","́" },
+  ["Ŝ"]={ "S","̂" },
+  ["ŝ"]={ "s","̂" },
+  ["Ş"]={ "S","̧" },
+  ["ş"]={ "s","̧" },
+  ["Š"]={ "S","̌" },
+  ["š"]={ "s","̌" },
+  ["Ţ"]={ "T","̧" },
+  ["ţ"]={ "t","̧" },
+  ["Ť"]={ "T","̌" },
+  ["ť"]={ "t","̌" },
+  ["Ũ"]={ "U","̃" },
+  ["ũ"]={ "u","̃" },
+  ["Ū"]={ "U","̄" },
+  ["ū"]={ "u","̄" },
+  ["Ŭ"]={ "U","̆" },
+  ["ŭ"]={ "u","̆" },
+  ["Ů"]={ "U","̊" },
+  ["ů"]={ "u","̊" },
+  ["Ű"]={ "U","̋" },
+  ["ű"]={ "u","̋" },
+  ["Ų"]={ "U","̨" },
+  ["ų"]={ "u","̨" },
+  ["Ŵ"]={ "W","̂" },
+  ["ŵ"]={ "w","̂" },
+  ["Ŷ"]={ "Y","̂" },
+  ["ŷ"]={ "y","̂" },
+  ["Ÿ"]={ "Y","̈" },
+  ["Ź"]={ "Z","́" },
+  ["ź"]={ "z","́" },
+  ["Ż"]={ "Z","̇" },
+  ["ż"]={ "z","̇" },
+  ["Ž"]={ "Z","̌" },
+  ["ž"]={ "z","̌" },
+  ["Ơ"]={ "O","̛" },
+  ["ơ"]={ "o","̛" },
+  ["Ư"]={ "U","̛" },
+  ["ư"]={ "u","̛" },
+  ["Ǎ"]={ "A","̌" },
+  ["ǎ"]={ "a","̌" },
+  ["Ǐ"]={ "I","̌" },
+  ["ǐ"]={ "i","̌" },
+  ["Ǒ"]={ "O","̌" },
+  ["ǒ"]={ "o","̌" },
+  ["Ǔ"]={ "U","̌" },
+  ["ǔ"]={ "u","̌" },
+  ["Ǖ"]={ "Ü","̄" },
+  ["ǖ"]={ "ü","̄" },
+  ["Ǘ"]={ "Ü","́" },
+  ["ǘ"]={ "ü","́" },
+  ["Ǚ"]={ "Ü","̌" },
+  ["ǚ"]={ "ü","̌" },
+  ["Ǜ"]={ "Ü","̀" },
+  ["ǜ"]={ "ü","̀" },
+  ["Ǟ"]={ "Ä","̄" },
+  ["ǟ"]={ "ä","̄" },
+  ["Ǡ"]={ "Ȧ","̄" },
+  ["ǡ"]={ "ȧ","̄" },
+  ["Ǣ"]={ "Æ","̄" },
+  ["ǣ"]={ "æ","̄" },
+  ["Ǧ"]={ "G","̌" },
+  ["ǧ"]={ "g","̌" },
+  ["Ǩ"]={ "K","̌" },
+  ["ǩ"]={ "k","̌" },
+  ["Ǫ"]={ "O","̨" },
+  ["ǫ"]={ "o","̨" },
+  ["Ǭ"]={ "Ǫ","̄" },
+  ["ǭ"]={ "ǫ","̄" },
+  ["Ǯ"]={ "Ʒ","̌" },
+  ["ǯ"]={ "ʒ","̌" },
+  ["ǰ"]={ "j","̌" },
+  ["Ǵ"]={ "G","́" },
+  ["ǵ"]={ "g","́" },
+  ["Ǹ"]={ "N","̀" },
+  ["ǹ"]={ "n","̀" },
+  ["Ǻ"]={ "Å","́" },
+  ["ǻ"]={ "å","́" },
+  ["Ǽ"]={ "Æ","́" },
+  ["ǽ"]={ "æ","́" },
+  ["Ǿ"]={ "Ø","́" },
+  ["ǿ"]={ "ø","́" },
+  ["Ȁ"]={ "A","̏" },
+  ["ȁ"]={ "a","̏" },
+  ["Ȃ"]={ "A","̑" },
+  ["ȃ"]={ "a","̑" },
+  ["Ȅ"]={ "E","̏" },
+  ["ȅ"]={ "e","̏" },
+  ["Ȇ"]={ "E","̑" },
+  ["ȇ"]={ "e","̑" },
+  ["Ȉ"]={ "I","̏" },
+  ["ȉ"]={ "i","̏" },
+  ["Ȋ"]={ "I","̑" },
+  ["ȋ"]={ "i","̑" },
+  ["Ȍ"]={ "O","̏" },
+  ["ȍ"]={ "o","̏" },
+  ["Ȏ"]={ "O","̑" },
+  ["ȏ"]={ "o","̑" },
+  ["Ȑ"]={ "R","̏" },
+  ["ȑ"]={ "r","̏" },
+  ["Ȓ"]={ "R","̑" },
+  ["ȓ"]={ "r","̑" },
+  ["Ȕ"]={ "U","̏" },
+  ["ȕ"]={ "u","̏" },
+  ["Ȗ"]={ "U","̑" },
+  ["ȗ"]={ "u","̑" },
+  ["Ș"]={ "S","̦" },
+  ["ș"]={ "s","̦" },
+  ["Ț"]={ "T","̦" },
+  ["ț"]={ "t","̦" },
+  ["Ȟ"]={ "H","̌" },
+  ["ȟ"]={ "h","̌" },
+  ["Ȧ"]={ "A","̇" },
+  ["ȧ"]={ "a","̇" },
+  ["Ȩ"]={ "E","̧" },
+  ["ȩ"]={ "e","̧" },
+  ["Ȫ"]={ "Ö","̄" },
+  ["ȫ"]={ "ö","̄" },
+  ["Ȭ"]={ "Õ","̄" },
+  ["ȭ"]={ "õ","̄" },
+  ["Ȯ"]={ "O","̇" },
+  ["ȯ"]={ "o","̇" },
+  ["Ȱ"]={ "Ȯ","̄" },
+  ["ȱ"]={ "ȯ","̄" },
+  ["Ȳ"]={ "Y","̄" },
+  ["ȳ"]={ "y","̄" },
+  ["̈́"]={ "̈","́" },
+  ["΅"]={ "¨","́" },
+  ["Ά"]={ "Α","́" },
+  ["Έ"]={ "Ε","́" },
+  ["Ή"]={ "Η","́" },
+  ["Ί"]={ "Ι","́" },
+  ["Ό"]={ "Ο","́" },
+  ["Ύ"]={ "Υ","́" },
+  ["Ώ"]={ "Ω","́" },
+  ["ΐ"]={ "ϊ","́" },
+  ["Ϊ"]={ "Ι","̈" },
+  ["Ϋ"]={ "Υ","̈" },
+  ["ά"]={ "α","́" },
+  ["έ"]={ "ε","́" },
+  ["ή"]={ "η","́" },
+  ["ί"]={ "ι","́" },
+  ["ΰ"]={ "ϋ","́" },
+  ["ϊ"]={ "ι","̈" },
+  ["ϋ"]={ "υ","̈" },
+  ["ό"]={ "ο","́" },
+  ["ύ"]={ "υ","́" },
+  ["ώ"]={ "ω","́" },
+  ["ϓ"]={ "ϒ","́" },
+  ["ϔ"]={ "ϒ","̈" },
+  ["Ѐ"]={ "Е","̀" },
+  ["Ё"]={ "Е","̈" },
+  ["Ѓ"]={ "Г","́" },
+  ["Ї"]={ "І","̈" },
+  ["Ќ"]={ "К","́" },
+  ["Ѝ"]={ "И","̀" },
+  ["Ў"]={ "У","̆" },
+  ["Й"]={ "И","̆" },
+  ["й"]={ "и","̆" },
+  ["ѐ"]={ "е","̀" },
+  ["ё"]={ "е","̈" },
+  ["ѓ"]={ "г","́" },
+  ["ї"]={ "і","̈" },
+  ["ќ"]={ "к","́" },
+  ["ѝ"]={ "и","̀" },
+  ["ў"]={ "у","̆" },
+  ["Ѷ"]={ "Ѵ","̏" },
+  ["ѷ"]={ "ѵ","̏" },
+  ["Ӂ"]={ "Ж","̆" },
+  ["ӂ"]={ "ж","̆" },
+  ["Ӑ"]={ "А","̆" },
+  ["ӑ"]={ "а","̆" },
+  ["Ӓ"]={ "А","̈" },
+  ["ӓ"]={ "а","̈" },
+  ["Ӗ"]={ "Е","̆" },
+  ["ӗ"]={ "е","̆" },
+  ["Ӛ"]={ "Ә","̈" },
+  ["ӛ"]={ "ә","̈" },
+  ["Ӝ"]={ "Ж","̈" },
+  ["ӝ"]={ "ж","̈" },
+  ["Ӟ"]={ "З","̈" },
+  ["ӟ"]={ "з","̈" },
+  ["Ӣ"]={ "И","̄" },
+  ["ӣ"]={ "и","̄" },
+  ["Ӥ"]={ "И","̈" },
+  ["ӥ"]={ "и","̈" },
+  ["Ӧ"]={ "О","̈" },
+  ["ӧ"]={ "о","̈" },
+  ["Ӫ"]={ "Ө","̈" },
+  ["ӫ"]={ "ө","̈" },
+  ["Ӭ"]={ "Э","̈" },
+  ["ӭ"]={ "э","̈" },
+  ["Ӯ"]={ "У","̄" },
+  ["ӯ"]={ "у","̄" },
+  ["Ӱ"]={ "У","̈" },
+  ["ӱ"]={ "у","̈" },
+  ["Ӳ"]={ "У","̋" },
+  ["ӳ"]={ "у","̋" },
+  ["Ӵ"]={ "Ч","̈" },
+  ["ӵ"]={ "ч","̈" },
+  ["Ӹ"]={ "Ы","̈" },
+  ["ӹ"]={ "ы","̈" },
+  ["آ"]={ "ا","ٓ" },
+  ["أ"]={ "ا","ٔ" },
+  ["ؤ"]={ "و","ٔ" },
+  ["إ"]={ "ا","ٕ" },
+  ["ئ"]={ "ي","ٔ" },
+  ["ۀ"]={ "ە","ٔ" },
+  ["ۂ"]={ "ہ","ٔ" },
+  ["ۓ"]={ "ے","ٔ" },
+  ["ऩ"]={ "न","़" },
+  ["ऱ"]={ "र","़" },
+  ["ऴ"]={ "ळ","़" },
+  ["क़"]={ "क","़" },
+  ["ख़"]={ "ख","़" },
+  ["ग़"]={ "ग","़" },
+  ["ज़"]={ "ज","़" },
+  ["ड़"]={ "ड","़" },
+  ["ढ़"]={ "ढ","़" },
+  ["फ़"]={ "फ","़" },
+  ["य़"]={ "य","़" },
+  ["ো"]={ "ে","া" },
+  ["ৌ"]={ "ে","ৗ" },
+  ["ড়"]={ "ড","়" },
+  ["ঢ়"]={ "ঢ","়" },
+  ["য়"]={ "য","়" },
+  ["ਲ਼"]={ "ਲ","਼" },
+  ["ਸ਼"]={ "ਸ","਼" },
+  ["ਖ਼"]={ "ਖ","਼" },
+  ["ਗ਼"]={ "ਗ","਼" },
+  ["ਜ਼"]={ "ਜ","਼" },
+  ["ਫ਼"]={ "ਫ","਼" },
+  ["ୈ"]={ "େ","ୖ" },
+  ["ୋ"]={ "େ","ା" },
+  ["ୌ"]={ "େ","ୗ" },
+  ["ଡ଼"]={ "ଡ","଼" },
+  ["ଢ଼"]={ "ଢ","଼" },
+  ["ஔ"]={ "ஒ","ௗ" },
+  ["ொ"]={ "ெ","ா" },
+  ["ோ"]={ "ே","ா" },
+  ["ௌ"]={ "ெ","ௗ" },
+  ["ై"]={ "ె","ౖ" },
+  ["ೀ"]={ "ಿ","ೕ" },
+  ["ೇ"]={ "ೆ","ೕ" },
+  ["ೈ"]={ "ೆ","ೖ" },
+  ["ೊ"]={ "ೆ","ೂ" },
+  ["ೋ"]={ "ೊ","ೕ" },
+  ["ൊ"]={ "െ","ാ" },
+  ["ോ"]={ "േ","ാ" },
+  ["ൌ"]={ "െ","ൗ" },
+  ["ේ"]={ "ෙ","්" },
+  ["ො"]={ "ෙ","ා" },
+  ["ෝ"]={ "ො","්" },
+  ["ෞ"]={ "ෙ","ෟ" },
+  ["གྷ"]={ "ག","ྷ" },
+  ["ཌྷ"]={ "ཌ","ྷ" },
+  ["དྷ"]={ "ད","ྷ" },
+  ["བྷ"]={ "བ","ྷ" },
+  ["ཛྷ"]={ "ཛ","ྷ" },
+  ["ཀྵ"]={ "ཀ","ྵ" },
+  ["ཱི"]={ "ཱ","ི" },
+  ["ཱུ"]={ "ཱ","ུ" },
+  ["ྲྀ"]={ "ྲ","ྀ" },
+  ["ླྀ"]={ "ླ","ྀ" },
+  ["ཱྀ"]={ "ཱ","ྀ" },
+  ["ྒྷ"]={ "ྒ","ྷ" },
+  ["ྜྷ"]={ "ྜ","ྷ" },
+  ["ྡྷ"]={ "ྡ","ྷ" },
+  ["ྦྷ"]={ "ྦ","ྷ" },
+  ["ྫྷ"]={ "ྫ","ྷ" },
+  ["ྐྵ"]={ "ྐ","ྵ" },
+  ["ဦ"]={ "ဥ","ီ" },
+  ["ᬆ"]={ "ᬅ","ᬵ" },
+  ["ᬈ"]={ "ᬇ","ᬵ" },
+  ["ᬊ"]={ "ᬉ","ᬵ" },
+  ["ᬌ"]={ "ᬋ","ᬵ" },
+  ["ᬎ"]={ "ᬍ","ᬵ" },
+  ["ᬒ"]={ "ᬑ","ᬵ" },
+  ["ᬻ"]={ "ᬺ","ᬵ" },
+  ["ᬽ"]={ "ᬼ","ᬵ" },
+  ["ᭀ"]={ "ᬾ","ᬵ" },
+  ["ᭁ"]={ "ᬿ","ᬵ" },
+  ["ᭃ"]={ "ᭂ","ᬵ" },
+  ["Ḁ"]={ "A","̥" },
+  ["ḁ"]={ "a","̥" },
+  ["Ḃ"]={ "B","̇" },
+  ["ḃ"]={ "b","̇" },
+  ["Ḅ"]={ "B","̣" },
+  ["ḅ"]={ "b","̣" },
+  ["Ḇ"]={ "B","̱" },
+  ["ḇ"]={ "b","̱" },
+  ["Ḉ"]={ "Ç","́" },
+  ["ḉ"]={ "ç","́" },
+  ["Ḋ"]={ "D","̇" },
+  ["ḋ"]={ "d","̇" },
+  ["Ḍ"]={ "D","̣" },
+  ["ḍ"]={ "d","̣" },
+  ["Ḏ"]={ "D","̱" },
+  ["ḏ"]={ "d","̱" },
+  ["Ḑ"]={ "D","̧" },
+  ["ḑ"]={ "d","̧" },
+  ["Ḓ"]={ "D","̭" },
+  ["ḓ"]={ "d","̭" },
+  ["Ḕ"]={ "Ē","̀" },
+  ["ḕ"]={ "ē","̀" },
+  ["Ḗ"]={ "Ē","́" },
+  ["ḗ"]={ "ē","́" },
+  ["Ḙ"]={ "E","̭" },
+  ["ḙ"]={ "e","̭" },
+  ["Ḛ"]={ "E","̰" },
+  ["ḛ"]={ "e","̰" },
+  ["Ḝ"]={ "Ȩ","̆" },
+  ["ḝ"]={ "ȩ","̆" },
+  ["Ḟ"]={ "F","̇" },
+  ["ḟ"]={ "f","̇" },
+  ["Ḡ"]={ "G","̄" },
+  ["ḡ"]={ "g","̄" },
+  ["Ḣ"]={ "H","̇" },
+  ["ḣ"]={ "h","̇" },
+  ["Ḥ"]={ "H","̣" },
+  ["ḥ"]={ "h","̣" },
+  ["Ḧ"]={ "H","̈" },
+  ["ḧ"]={ "h","̈" },
+  ["Ḩ"]={ "H","̧" },
+  ["ḩ"]={ "h","̧" },
+  ["Ḫ"]={ "H","̮" },
+  ["ḫ"]={ "h","̮" },
+  ["Ḭ"]={ "I","̰" },
+  ["ḭ"]={ "i","̰" },
+  ["Ḯ"]={ "Ï","́" },
+  ["ḯ"]={ "ï","́" },
+  ["Ḱ"]={ "K","́" },
+  ["ḱ"]={ "k","́" },
+  ["Ḳ"]={ "K","̣" },
+  ["ḳ"]={ "k","̣" },
+  ["Ḵ"]={ "K","̱" },
+  ["ḵ"]={ "k","̱" },
+  ["Ḷ"]={ "L","̣" },
+  ["ḷ"]={ "l","̣" },
+  ["Ḹ"]={ "Ḷ","̄" },
+  ["ḹ"]={ "ḷ","̄" },
+  ["Ḻ"]={ "L","̱" },
+  ["ḻ"]={ "l","̱" },
+  ["Ḽ"]={ "L","̭" },
+  ["ḽ"]={ "l","̭" },
+  ["Ḿ"]={ "M","́" },
+  ["ḿ"]={ "m","́" },
+  ["Ṁ"]={ "M","̇" },
+  ["ṁ"]={ "m","̇" },
+  ["Ṃ"]={ "M","̣" },
+  ["ṃ"]={ "m","̣" },
+  ["Ṅ"]={ "N","̇" },
+  ["ṅ"]={ "n","̇" },
+  ["Ṇ"]={ "N","̣" },
+  ["ṇ"]={ "n","̣" },
+  ["Ṉ"]={ "N","̱" },
+  ["ṉ"]={ "n","̱" },
+  ["Ṋ"]={ "N","̭" },
+  ["ṋ"]={ "n","̭" },
+  ["Ṍ"]={ "Õ","́" },
+  ["ṍ"]={ "õ","́" },
+  ["Ṏ"]={ "Õ","̈" },
+  ["ṏ"]={ "õ","̈" },
+  ["Ṑ"]={ "Ō","̀" },
+  ["ṑ"]={ "ō","̀" },
+  ["Ṓ"]={ "Ō","́" },
+  ["ṓ"]={ "ō","́" },
+  ["Ṕ"]={ "P","́" },
+  ["ṕ"]={ "p","́" },
+  ["Ṗ"]={ "P","̇" },
+  ["ṗ"]={ "p","̇" },
+  ["Ṙ"]={ "R","̇" },
+  ["ṙ"]={ "r","̇" },
+  ["Ṛ"]={ "R","̣" },
+  ["ṛ"]={ "r","̣" },
+  ["Ṝ"]={ "Ṛ","̄" },
+  ["ṝ"]={ "ṛ","̄" },
+  ["Ṟ"]={ "R","̱" },
+  ["ṟ"]={ "r","̱" },
+  ["Ṡ"]={ "S","̇" },
+  ["ṡ"]={ "s","̇" },
+  ["Ṣ"]={ "S","̣" },
+  ["ṣ"]={ "s","̣" },
+  ["Ṥ"]={ "Ś","̇" },
+  ["ṥ"]={ "ś","̇" },
+  ["Ṧ"]={ "Š","̇" },
+  ["ṧ"]={ "š","̇" },
+  ["Ṩ"]={ "Ṣ","̇" },
+  ["ṩ"]={ "ṣ","̇" },
+  ["Ṫ"]={ "T","̇" },
+  ["ṫ"]={ "t","̇" },
+  ["Ṭ"]={ "T","̣" },
+  ["ṭ"]={ "t","̣" },
+  ["Ṯ"]={ "T","̱" },
+  ["ṯ"]={ "t","̱" },
+  ["Ṱ"]={ "T","̭" },
+  ["ṱ"]={ "t","̭" },
+  ["Ṳ"]={ "U","̤" },
+  ["ṳ"]={ "u","̤" },
+  ["Ṵ"]={ "U","̰" },
+  ["ṵ"]={ "u","̰" },
+  ["Ṷ"]={ "U","̭" },
+  ["ṷ"]={ "u","̭" },
+  ["Ṹ"]={ "Ũ","́" },
+  ["ṹ"]={ "ũ","́" },
+  ["Ṻ"]={ "Ū","̈" },
+  ["ṻ"]={ "ū","̈" },
+  ["Ṽ"]={ "V","̃" },
+  ["ṽ"]={ "v","̃" },
+  ["Ṿ"]={ "V","̣" },
+  ["ṿ"]={ "v","̣" },
+  ["Ẁ"]={ "W","̀" },
+  ["ẁ"]={ "w","̀" },
+  ["Ẃ"]={ "W","́" },
+  ["ẃ"]={ "w","́" },
+  ["Ẅ"]={ "W","̈" },
+  ["ẅ"]={ "w","̈" },
+  ["Ẇ"]={ "W","̇" },
+  ["ẇ"]={ "w","̇" },
+  ["Ẉ"]={ "W","̣" },
+  ["ẉ"]={ "w","̣" },
+  ["Ẋ"]={ "X","̇" },
+  ["ẋ"]={ "x","̇" },
+  ["Ẍ"]={ "X","̈" },
+  ["ẍ"]={ "x","̈" },
+  ["Ẏ"]={ "Y","̇" },
+  ["ẏ"]={ "y","̇" },
+  ["Ẑ"]={ "Z","̂" },
+  ["ẑ"]={ "z","̂" },
+  ["Ẓ"]={ "Z","̣" },
+  ["ẓ"]={ "z","̣" },
+  ["Ẕ"]={ "Z","̱" },
+  ["ẕ"]={ "z","̱" },
+  ["ẖ"]={ "h","̱" },
+  ["ẗ"]={ "t","̈" },
+  ["ẘ"]={ "w","̊" },
+  ["ẙ"]={ "y","̊" },
+  ["ẛ"]={ "ſ","̇" },
+  ["Ạ"]={ "A","̣" },
+  ["ạ"]={ "a","̣" },
+  ["Ả"]={ "A","̉" },
+  ["ả"]={ "a","̉" },
+  ["Ấ"]={ "Â","́" },
+  ["ấ"]={ "â","́" },
+  ["Ầ"]={ "Â","̀" },
+  ["ầ"]={ "â","̀" },
+  ["Ẩ"]={ "Â","̉" },
+  ["ẩ"]={ "â","̉" },
+  ["Ẫ"]={ "Â","̃" },
+  ["ẫ"]={ "â","̃" },
+  ["Ậ"]={ "Ạ","̂" },
+  ["ậ"]={ "ạ","̂" },
+  ["Ắ"]={ "Ă","́" },
+  ["ắ"]={ "ă","́" },
+  ["Ằ"]={ "Ă","̀" },
+  ["ằ"]={ "ă","̀" },
+  ["Ẳ"]={ "Ă","̉" },
+  ["ẳ"]={ "ă","̉" },
+  ["Ẵ"]={ "Ă","̃" },
+  ["ẵ"]={ "ă","̃" },
+  ["Ặ"]={ "Ạ","̆" },
+  ["ặ"]={ "ạ","̆" },
+  ["Ẹ"]={ "E","̣" },
+  ["ẹ"]={ "e","̣" },
+  ["Ẻ"]={ "E","̉" },
+  ["ẻ"]={ "e","̉" },
+  ["Ẽ"]={ "E","̃" },
+  ["ẽ"]={ "e","̃" },
+  ["Ế"]={ "Ê","́" },
+  ["ế"]={ "ê","́" },
+  ["Ề"]={ "Ê","̀" },
+  ["ề"]={ "ê","̀" },
+  ["Ể"]={ "Ê","̉" },
+  ["ể"]={ "ê","̉" },
+  ["Ễ"]={ "Ê","̃" },
+  ["ễ"]={ "ê","̃" },
+  ["Ệ"]={ "Ẹ","̂" },
+  ["ệ"]={ "ẹ","̂" },
+  ["Ỉ"]={ "I","̉" },
+  ["ỉ"]={ "i","̉" },
+  ["Ị"]={ "I","̣" },
+  ["ị"]={ "i","̣" },
+  ["Ọ"]={ "O","̣" },
+  ["ọ"]={ "o","̣" },
+  ["Ỏ"]={ "O","̉" },
+  ["ỏ"]={ "o","̉" },
+  ["Ố"]={ "Ô","́" },
+  ["ố"]={ "ô","́" },
+  ["Ồ"]={ "Ô","̀" },
+  ["ồ"]={ "ô","̀" },
+  ["Ổ"]={ "Ô","̉" },
+  ["ổ"]={ "ô","̉" },
+  ["Ỗ"]={ "Ô","̃" },
+  ["ỗ"]={ "ô","̃" },
+  ["Ộ"]={ "Ọ","̂" },
+  ["ộ"]={ "ọ","̂" },
+  ["Ớ"]={ "Ơ","́" },
+  ["ớ"]={ "ơ","́" },
+  ["Ờ"]={ "Ơ","̀" },
+  ["ờ"]={ "ơ","̀" },
+  ["Ở"]={ "Ơ","̉" },
+  ["ở"]={ "ơ","̉" },
+  ["Ỡ"]={ "Ơ","̃" },
+  ["ỡ"]={ "ơ","̃" },
+  ["Ợ"]={ "Ơ","̣" },
+  ["ợ"]={ "ơ","̣" },
+  ["Ụ"]={ "U","̣" },
+  ["ụ"]={ "u","̣" },
+  ["Ủ"]={ "U","̉" },
+  ["ủ"]={ "u","̉" },
+  ["Ứ"]={ "Ư","́" },
+  ["ứ"]={ "ư","́" },
+  ["Ừ"]={ "Ư","̀" },
+  ["ừ"]={ "ư","̀" },
+  ["Ử"]={ "Ư","̉" },
+  ["ử"]={ "ư","̉" },
+  ["Ữ"]={ "Ư","̃" },
+  ["ữ"]={ "ư","̃" },
+  ["Ự"]={ "Ư","̣" },
+  ["ự"]={ "ư","̣" },
+  ["Ỳ"]={ "Y","̀" },
+  ["ỳ"]={ "y","̀" },
+  ["Ỵ"]={ "Y","̣" },
+  ["ỵ"]={ "y","̣" },
+  ["Ỷ"]={ "Y","̉" },
+  ["ỷ"]={ "y","̉" },
+  ["Ỹ"]={ "Y","̃" },
+  ["ỹ"]={ "y","̃" },
+  ["ἀ"]={ "α","̓" },
+  ["ἁ"]={ "α","̔" },
+  ["ἂ"]={ "ἀ","̀" },
+  ["ἃ"]={ "ἁ","̀" },
+  ["ἄ"]={ "ἀ","́" },
+  ["ἅ"]={ "ἁ","́" },
+  ["ἆ"]={ "ἀ","͂" },
+  ["ἇ"]={ "ἁ","͂" },
+  ["Ἀ"]={ "Α","̓" },
+  ["Ἁ"]={ "Α","̔" },
+  ["Ἂ"]={ "Ἀ","̀" },
+  ["Ἃ"]={ "Ἁ","̀" },
+  ["Ἄ"]={ "Ἀ","́" },
+  ["Ἅ"]={ "Ἁ","́" },
+  ["Ἆ"]={ "Ἀ","͂" },
+  ["Ἇ"]={ "Ἁ","͂" },
+  ["ἐ"]={ "ε","̓" },
+  ["ἑ"]={ "ε","̔" },
+  ["ἒ"]={ "ἐ","̀" },
+  ["ἓ"]={ "ἑ","̀" },
+  ["ἔ"]={ "ἐ","́" },
+  ["ἕ"]={ "ἑ","́" },
+  ["Ἐ"]={ "Ε","̓" },
+  ["Ἑ"]={ "Ε","̔" },
+  ["Ἒ"]={ "Ἐ","̀" },
+  ["Ἓ"]={ "Ἑ","̀" },
+  ["Ἔ"]={ "Ἐ","́" },
+  ["Ἕ"]={ "Ἑ","́" },
+  ["ἠ"]={ "η","̓" },
+  ["ἡ"]={ "η","̔" },
+  ["ἢ"]={ "ἠ","̀" },
+  ["ἣ"]={ "ἡ","̀" },
+  ["ἤ"]={ "ἠ","́" },
+  ["ἥ"]={ "ἡ","́" },
+  ["ἦ"]={ "ἠ","͂" },
+  ["ἧ"]={ "ἡ","͂" },
+  ["Ἠ"]={ "Η","̓" },
+  ["Ἡ"]={ "Η","̔" },
+  ["Ἢ"]={ "Ἠ","̀" },
+  ["Ἣ"]={ "Ἡ","̀" },
+  ["Ἤ"]={ "Ἠ","́" },
+  ["Ἥ"]={ "Ἡ","́" },
+  ["Ἦ"]={ "Ἠ","͂" },
+  ["Ἧ"]={ "Ἡ","͂" },
+  ["ἰ"]={ "ι","̓" },
+  ["ἱ"]={ "ι","̔" },
+  ["ἲ"]={ "ἰ","̀" },
+  ["ἳ"]={ "ἱ","̀" },
+  ["ἴ"]={ "ἰ","́" },
+  ["ἵ"]={ "ἱ","́" },
+  ["ἶ"]={ "ἰ","͂" },
+  ["ἷ"]={ "ἱ","͂" },
+  ["Ἰ"]={ "Ι","̓" },
+  ["Ἱ"]={ "Ι","̔" },
+  ["Ἲ"]={ "Ἰ","̀" },
+  ["Ἳ"]={ "Ἱ","̀" },
+  ["Ἴ"]={ "Ἰ","́" },
+  ["Ἵ"]={ "Ἱ","́" },
+  ["Ἶ"]={ "Ἰ","͂" },
+  ["Ἷ"]={ "Ἱ","͂" },
+  ["ὀ"]={ "ο","̓" },
+  ["ὁ"]={ "ο","̔" },
+  ["ὂ"]={ "ὀ","̀" },
+  ["ὃ"]={ "ὁ","̀" },
+  ["ὄ"]={ "ὀ","́" },
+  ["ὅ"]={ "ὁ","́" },
+  ["Ὀ"]={ "Ο","̓" },
+  ["Ὁ"]={ "Ο","̔" },
+  ["Ὂ"]={ "Ὀ","̀" },
+  ["Ὃ"]={ "Ὁ","̀" },
+  ["Ὄ"]={ "Ὀ","́" },
+  ["Ὅ"]={ "Ὁ","́" },
+  ["ὐ"]={ "υ","̓" },
+  ["ὑ"]={ "υ","̔" },
+  ["ὒ"]={ "ὐ","̀" },
+  ["ὓ"]={ "ὑ","̀" },
+  ["ὔ"]={ "ὐ","́" },
+  ["ὕ"]={ "ὑ","́" },
+  ["ὖ"]={ "ὐ","͂" },
+  ["ὗ"]={ "ὑ","͂" },
+  ["Ὑ"]={ "Υ","̔" },
+  ["Ὓ"]={ "Ὑ","̀" },
+  ["Ὕ"]={ "Ὑ","́" },
+  ["Ὗ"]={ "Ὑ","͂" },
+  ["ὠ"]={ "ω","̓" },
+  ["ὡ"]={ "ω","̔" },
+  ["ὢ"]={ "ὠ","̀" },
+  ["ὣ"]={ "ὡ","̀" },
+  ["ὤ"]={ "ὠ","́" },
+  ["ὥ"]={ "ὡ","́" },
+  ["ὦ"]={ "ὠ","͂" },
+  ["ὧ"]={ "ὡ","͂" },
+  ["Ὠ"]={ "Ω","̓" },
+  ["Ὡ"]={ "Ω","̔" },
+  ["Ὢ"]={ "Ὠ","̀" },
+  ["Ὣ"]={ "Ὡ","̀" },
+  ["Ὤ"]={ "Ὠ","́" },
+  ["Ὥ"]={ "Ὡ","́" },
+  ["Ὦ"]={ "Ὠ","͂" },
+  ["Ὧ"]={ "Ὡ","͂" },
+  ["ὰ"]={ "α","̀" },
+  ["ὲ"]={ "ε","̀" },
+  ["ὴ"]={ "η","̀" },
+  ["ὶ"]={ "ι","̀" },
+  ["ὸ"]={ "ο","̀" },
+  ["ὺ"]={ "υ","̀" },
+  ["ὼ"]={ "ω","̀" },
+  ["ᾀ"]={ "ἀ","ͅ" },
+  ["ᾁ"]={ "ἁ","ͅ" },
+  ["ᾂ"]={ "ἂ","ͅ" },
+  ["ᾃ"]={ "ἃ","ͅ" },
+  ["ᾄ"]={ "ἄ","ͅ" },
+  ["ᾅ"]={ "ἅ","ͅ" },
+  ["ᾆ"]={ "ἆ","ͅ" },
+  ["ᾇ"]={ "ἇ","ͅ" },
+  ["ᾈ"]={ "Ἀ","ͅ" },
+  ["ᾉ"]={ "Ἁ","ͅ" },
+  ["ᾊ"]={ "Ἂ","ͅ" },
+  ["ᾋ"]={ "Ἃ","ͅ" },
+  ["ᾌ"]={ "Ἄ","ͅ" },
+  ["ᾍ"]={ "Ἅ","ͅ" },
+  ["ᾎ"]={ "Ἆ","ͅ" },
+  ["ᾏ"]={ "Ἇ","ͅ" },
+  ["ᾐ"]={ "ἠ","ͅ" },
+  ["ᾑ"]={ "ἡ","ͅ" },
+  ["ᾒ"]={ "ἢ","ͅ" },
+  ["ᾓ"]={ "ἣ","ͅ" },
+  ["ᾔ"]={ "ἤ","ͅ" },
+  ["ᾕ"]={ "ἥ","ͅ" },
+  ["ᾖ"]={ "ἦ","ͅ" },
+  ["ᾗ"]={ "ἧ","ͅ" },
+  ["ᾘ"]={ "Ἠ","ͅ" },
+  ["ᾙ"]={ "Ἡ","ͅ" },
+  ["ᾚ"]={ "Ἢ","ͅ" },
+  ["ᾛ"]={ "Ἣ","ͅ" },
+  ["ᾜ"]={ "Ἤ","ͅ" },
+  ["ᾝ"]={ "Ἥ","ͅ" },
+  ["ᾞ"]={ "Ἦ","ͅ" },
+  ["ᾟ"]={ "Ἧ","ͅ" },
+  ["ᾠ"]={ "ὠ","ͅ" },
+  ["ᾡ"]={ "ὡ","ͅ" },
+  ["ᾢ"]={ "ὢ","ͅ" },
+  ["ᾣ"]={ "ὣ","ͅ" },
+  ["ᾤ"]={ "ὤ","ͅ" },
+  ["ᾥ"]={ "ὥ","ͅ" },
+  ["ᾦ"]={ "ὦ","ͅ" },
+  ["ᾧ"]={ "ὧ","ͅ" },
+  ["ᾨ"]={ "Ὠ","ͅ" },
+  ["ᾩ"]={ "Ὡ","ͅ" },
+  ["ᾪ"]={ "Ὢ","ͅ" },
+  ["ᾫ"]={ "Ὣ","ͅ" },
+  ["ᾬ"]={ "Ὤ","ͅ" },
+  ["ᾭ"]={ "Ὥ","ͅ" },
+  ["ᾮ"]={ "Ὦ","ͅ" },
+  ["ᾯ"]={ "Ὧ","ͅ" },
+  ["ᾰ"]={ "α","̆" },
+  ["ᾱ"]={ "α","̄" },
+  ["ᾲ"]={ "ὰ","ͅ" },
+  ["ᾳ"]={ "α","ͅ" },
+  ["ᾴ"]={ "ά","ͅ" },
+  ["ᾶ"]={ "α","͂" },
+  ["ᾷ"]={ "ᾶ","ͅ" },
+  ["Ᾰ"]={ "Α","̆" },
+  ["Ᾱ"]={ "Α","̄" },
+  ["Ὰ"]={ "Α","̀" },
+  ["ᾼ"]={ "Α","ͅ" },
+  ["῁"]={ "¨","͂" },
+  ["ῂ"]={ "ὴ","ͅ" },
+  ["ῃ"]={ "η","ͅ" },
+  ["ῄ"]={ "ή","ͅ" },
+  ["ῆ"]={ "η","͂" },
+  ["ῇ"]={ "ῆ","ͅ" },
+  ["Ὲ"]={ "Ε","̀" },
+  ["Ὴ"]={ "Η","̀" },
+  ["ῌ"]={ "Η","ͅ" },
+  ["῍"]={ "᾿","̀" },
+  ["῎"]={ "᾿","́" },
+  ["῏"]={ "᾿","͂" },
+  ["ῐ"]={ "ι","̆" },
+  ["ῑ"]={ "ι","̄" },
+  ["ῒ"]={ "ϊ","̀" },
+  ["ῖ"]={ "ι","͂" },
+  ["ῗ"]={ "ϊ","͂" },
+  ["Ῐ"]={ "Ι","̆" },
+  ["Ῑ"]={ "Ι","̄" },
+  ["Ὶ"]={ "Ι","̀" },
+  ["῝"]={ "῾","̀" },
+  ["῞"]={ "῾","́" },
+  ["῟"]={ "῾","͂" },
+  ["ῠ"]={ "υ","̆" },
+  ["ῡ"]={ "υ","̄" },
+  ["ῢ"]={ "ϋ","̀" },
+  ["ῤ"]={ "ρ","̓" },
+  ["ῥ"]={ "ρ","̔" },
+  ["ῦ"]={ "υ","͂" },
+  ["ῧ"]={ "ϋ","͂" },
+  ["Ῠ"]={ "Υ","̆" },
+  ["Ῡ"]={ "Υ","̄" },
+  ["Ὺ"]={ "Υ","̀" },
+  ["Ῥ"]={ "Ρ","̔" },
+  ["῭"]={ "¨","̀" },
+  ["ῲ"]={ "ὼ","ͅ" },
+  ["ῳ"]={ "ω","ͅ" },
+  ["ῴ"]={ "ώ","ͅ" },
+  ["ῶ"]={ "ω","͂" },
+  ["ῷ"]={ "ῶ","ͅ" },
+  ["Ὸ"]={ "Ο","̀" },
+  ["Ὼ"]={ "Ω","̀" },
+  ["ῼ"]={ "Ω","ͅ" },
+  ["↚"]={ "←","̸" },
+  ["↛"]={ "→","̸" },
+  ["↮"]={ "↔","̸" },
+  ["⇍"]={ "⇐","̸" },
+  ["⇎"]={ "⇔","̸" },
+  ["⇏"]={ "⇒","̸" },
+  ["∄"]={ "∃","̸" },
+  ["∉"]={ "∈","̸" },
+  ["∌"]={ "∋","̸" },
+  ["∤"]={ "∣","̸" },
+  ["∦"]={ "∥","̸" },
+  ["≁"]={ "∼","̸" },
+  ["≄"]={ "≃","̸" },
+  ["≇"]={ "≅","̸" },
+  ["≉"]={ "≈","̸" },
+  ["≠"]={ "=","̸" },
+  ["≢"]={ "≡","̸" },
+  ["≭"]={ "≍","̸" },
+  ["≮"]={ "<","̸" },
+  ["≯"]={ ">","̸" },
+  ["≰"]={ "≤","̸" },
+  ["≱"]={ "≥","̸" },
+  ["≴"]={ "≲","̸" },
+  ["≵"]={ "≳","̸" },
+  ["≸"]={ "≶","̸" },
+  ["≹"]={ "≷","̸" },
+  ["⊀"]={ "≺","̸" },
+  ["⊁"]={ "≻","̸" },
+  ["⊄"]={ "⊂","̸" },
+  ["⊅"]={ "⊃","̸" },
+  ["⊈"]={ "⊆","̸" },
+  ["⊉"]={ "⊇","̸" },
+  ["⊬"]={ "⊢","̸" },
+  ["⊭"]={ "⊨","̸" },
+  ["⊮"]={ "⊩","̸" },
+  ["⊯"]={ "⊫","̸" },
+  ["⋠"]={ "≼","̸" },
+  ["⋡"]={ "≽","̸" },
+  ["⋢"]={ "⊑","̸" },
+  ["⋣"]={ "⊒","̸" },
+  ["⋪"]={ "⊲","̸" },
+  ["⋫"]={ "⊳","̸" },
+  ["⋬"]={ "⊴","̸" },
+  ["⋭"]={ "⊵","̸" },
+  ["⫝̸"]={ "⫝","̸" },
+  ["が"]={ "か","゙" },
+  ["ぎ"]={ "き","゙" },
+  ["ぐ"]={ "く","゙" },
+  ["げ"]={ "け","゙" },
+  ["ご"]={ "こ","゙" },
+  ["ざ"]={ "さ","゙" },
+  ["じ"]={ "し","゙" },
+  ["ず"]={ "す","゙" },
+  ["ぜ"]={ "せ","゙" },
+  ["ぞ"]={ "そ","゙" },
+  ["だ"]={ "た","゙" },
+  ["ぢ"]={ "ち","゙" },
+  ["づ"]={ "つ","゙" },
+  ["で"]={ "て","゙" },
+  ["ど"]={ "と","゙" },
+  ["ば"]={ "は","゙" },
+  ["ぱ"]={ "は","゚" },
+  ["び"]={ "ひ","゙" },
+  ["ぴ"]={ "ひ","゚" },
+  ["ぶ"]={ "ふ","゙" },
+  ["ぷ"]={ "ふ","゚" },
+  ["べ"]={ "へ","゙" },
+  ["ぺ"]={ "へ","゚" },
+  ["ぼ"]={ "ほ","゙" },
+  ["ぽ"]={ "ほ","゚" },
+  ["ゔ"]={ "う","゙" },
+  ["ゞ"]={ "ゝ","゙" },
+  ["ガ"]={ "カ","゙" },
+  ["ギ"]={ "キ","゙" },
+  ["グ"]={ "ク","゙" },
+  ["ゲ"]={ "ケ","゙" },
+  ["ゴ"]={ "コ","゙" },
+  ["ザ"]={ "サ","゙" },
+  ["ジ"]={ "シ","゙" },
+  ["ズ"]={ "ス","゙" },
+  ["ゼ"]={ "セ","゙" },
+  ["ゾ"]={ "ソ","゙" },
+  ["ダ"]={ "タ","゙" },
+  ["ヂ"]={ "チ","゙" },
+  ["ヅ"]={ "ツ","゙" },
+  ["デ"]={ "テ","゙" },
+  ["ド"]={ "ト","゙" },
+  ["バ"]={ "ハ","゙" },
+  ["パ"]={ "ハ","゚" },
+  ["ビ"]={ "ヒ","゙" },
+  ["ピ"]={ "ヒ","゚" },
+  ["ブ"]={ "フ","゙" },
+  ["プ"]={ "フ","゚" },
+  ["ベ"]={ "ヘ","゙" },
+  ["ペ"]={ "ヘ","゚" },
+  ["ボ"]={ "ホ","゙" },
+  ["ポ"]={ "ホ","゚" },
+  ["ヴ"]={ "ウ","゙" },
+  ["ヷ"]={ "ワ","゙" },
+  ["ヸ"]={ "ヰ","゙" },
+  ["ヹ"]={ "ヱ","゙" },
+  ["ヺ"]={ "ヲ","゙" },
+  ["ヾ"]={ "ヽ","゙" },
+  ["יִ"]={ "י","ִ" },
+  ["ײַ"]={ "ײ","ַ" },
+  ["שׁ"]={ "ש","ׁ" },
+  ["שׂ"]={ "ש","ׂ" },
+  ["שּׁ"]={ "שּ","ׁ" },
+  ["שּׂ"]={ "שּ","ׂ" },
+  ["אַ"]={ "א","ַ" },
+  ["אָ"]={ "א","ָ" },
+  ["אּ"]={ "א","ּ" },
+  ["בּ"]={ "ב","ּ" },
+  ["גּ"]={ "ג","ּ" },
+  ["דּ"]={ "ד","ּ" },
+  ["הּ"]={ "ה","ּ" },
+  ["וּ"]={ "ו","ּ" },
+  ["זּ"]={ "ז","ּ" },
+  ["טּ"]={ "ט","ּ" },
+  ["יּ"]={ "י","ּ" },
+  ["ךּ"]={ "ך","ּ" },
+  ["כּ"]={ "כ","ּ" },
+  ["לּ"]={ "ל","ּ" },
+  ["מּ"]={ "מ","ּ" },
+  ["נּ"]={ "נ","ּ" },
+  ["סּ"]={ "ס","ּ" },
+  ["ףּ"]={ "ף","ּ" },
+  ["פּ"]={ "פ","ּ" },
+  ["צּ"]={ "צ","ּ" },
+  ["קּ"]={ "ק","ּ" },
+  ["רּ"]={ "ר","ּ" },
+  ["שּ"]={ "ש","ּ" },
+  ["תּ"]={ "ת","ּ" },
+  ["וֹ"]={ "ו","ֹ" },
+  ["בֿ"]={ "ב","ֿ" },
+  ["כֿ"]={ "כ","ֿ" },
+  ["פֿ"]={ "פ","ֿ" },
+  ["𑂚"]={ "𑂙","𑂺" },
+  ["𑂜"]={ "𑂛","𑂺" },
+  ["𑂫"]={ "𑂥","𑂺" },
+  ["𑄮"]={ "𑄱","𑄧" },
+  ["𑄯"]={ "𑄲","𑄧" },
+  ["𑍋"]={ "𑍇","𑌾" },
+  ["𑍌"]={ "𑍇","𑍗" },
+  ["𑒻"]={ "𑒹","𑒺" },
+  ["𑒼"]={ "𑒹","𑒰" },
+  ["𑒾"]={ "𑒹","𑒽" },
+  ["𑖺"]={ "𑖸","𑖯" },
+  ["𑖻"]={ "𑖹","𑖯" },
+  ["𝅗𝅥"]={ "𝅗","𝅥" },
+  ["𝅘𝅥"]={ "𝅘","𝅥" },
+  ["𝅘𝅥𝅮"]={ "𝅘𝅥","𝅮" },
+  ["𝅘𝅥𝅯"]={ "𝅘𝅥","𝅯" },
+  ["𝅘𝅥𝅰"]={ "𝅘𝅥","𝅰" },
+  ["𝅘𝅥𝅱"]={ "𝅘𝅥","𝅱" },
+  ["𝅘𝅥𝅲"]={ "𝅘𝅥","𝅲" },
+  ["𝆹𝅥"]={ "𝆹","𝅥" },
+  ["𝆺𝅥"]={ "𝆺","𝅥" },
+  ["𝆹𝅥𝅮"]={ "𝆹𝅥","𝅮" },
+  ["𝆺𝅥𝅮"]={ "𝆺𝅥","𝅮" },
+  ["𝆹𝅥𝅯"]={ "𝆹𝅥","𝅯" },
+  ["𝆺𝅥𝅯"]={ "𝆺𝅥","𝅯" },
+  },
+ },
+ {
+  ["data"]={
+  ["À"]={ "A","̀" },
+  ["Á"]={ "A","́" },
+  ["Â"]={ "A","̂" },
+  ["Ã"]={ "A","̃" },
+  ["Ä"]={ "A","̈" },
+  ["Å"]={ "A","̊" },
+  ["Ç"]={ "C","̧" },
+  ["È"]={ "E","̀" },
+  ["É"]={ "E","́" },
+  ["Ê"]={ "E","̂" },
+  ["Ë"]={ "E","̈" },
+  ["Ì"]={ "I","̀" },
+  ["Í"]={ "I","́" },
+  ["Î"]={ "I","̂" },
+  ["Ï"]={ "I","̈" },
+  ["Ñ"]={ "N","̃" },
+  ["Ò"]={ "O","̀" },
+  ["Ó"]={ "O","́" },
+  ["Ô"]={ "O","̂" },
+  ["Õ"]={ "O","̃" },
+  ["Ö"]={ "O","̈" },
+  ["Ù"]={ "U","̀" },
+  ["Ú"]={ "U","́" },
+  ["Û"]={ "U","̂" },
+  ["Ü"]={ "U","̈" },
+  ["Ý"]={ "Y","́" },
+  ["à"]={ "a","̀" },
+  ["á"]={ "a","́" },
+  ["â"]={ "a","̂" },
+  ["ã"]={ "a","̃" },
+  ["ä"]={ "a","̈" },
+  ["å"]={ "a","̊" },
+  ["ç"]={ "c","̧" },
+  ["è"]={ "e","̀" },
+  ["é"]={ "e","́" },
+  ["ê"]={ "e","̂" },
+  ["ë"]={ "e","̈" },
+  ["ì"]={ "i","̀" },
+  ["í"]={ "i","́" },
+  ["î"]={ "i","̂" },
+  ["ï"]={ "i","̈" },
+  ["ñ"]={ "n","̃" },
+  ["ò"]={ "o","̀" },
+  ["ó"]={ "o","́" },
+  ["ô"]={ "o","̂" },
+  ["õ"]={ "o","̃" },
+  ["ö"]={ "o","̈" },
+  ["ù"]={ "u","̀" },
+  ["ú"]={ "u","́" },
+  ["û"]={ "u","̂" },
+  ["ü"]={ "u","̈" },
+  ["ý"]={ "y","́" },
+  ["ÿ"]={ "y","̈" },
+  ["Ā"]={ "A","̄" },
+  ["ā"]={ "a","̄" },
+  ["Ă"]={ "A","̆" },
+  ["ă"]={ "a","̆" },
+  ["Ą"]={ "A","̨" },
+  ["ą"]={ "a","̨" },
+  ["Ć"]={ "C","́" },
+  ["ć"]={ "c","́" },
+  ["Ĉ"]={ "C","̂" },
+  ["ĉ"]={ "c","̂" },
+  ["Ċ"]={ "C","̇" },
+  ["ċ"]={ "c","̇" },
+  ["Č"]={ "C","̌" },
+  ["č"]={ "c","̌" },
+  ["Ď"]={ "D","̌" },
+  ["ď"]={ "d","̌" },
+  ["Ē"]={ "E","̄" },
+  ["ē"]={ "e","̄" },
+  ["Ĕ"]={ "E","̆" },
+  ["ĕ"]={ "e","̆" },
+  ["Ė"]={ "E","̇" },
+  ["ė"]={ "e","̇" },
+  ["Ę"]={ "E","̨" },
+  ["ę"]={ "e","̨" },
+  ["Ě"]={ "E","̌" },
+  ["ě"]={ "e","̌" },
+  ["Ĝ"]={ "G","̂" },
+  ["ĝ"]={ "g","̂" },
+  ["Ğ"]={ "G","̆" },
+  ["ğ"]={ "g","̆" },
+  ["Ġ"]={ "G","̇" },
+  ["ġ"]={ "g","̇" },
+  ["Ģ"]={ "G","̧" },
+  ["ģ"]={ "g","̧" },
+  ["Ĥ"]={ "H","̂" },
+  ["ĥ"]={ "h","̂" },
+  ["Ĩ"]={ "I","̃" },
+  ["ĩ"]={ "i","̃" },
+  ["Ī"]={ "I","̄" },
+  ["ī"]={ "i","̄" },
+  ["Ĭ"]={ "I","̆" },
+  ["ĭ"]={ "i","̆" },
+  ["Į"]={ "I","̨" },
+  ["į"]={ "i","̨" },
+  ["İ"]={ "I","̇" },
+  ["Ĵ"]={ "J","̂" },
+  ["ĵ"]={ "j","̂" },
+  ["Ķ"]={ "K","̧" },
+  ["ķ"]={ "k","̧" },
+  ["Ĺ"]={ "L","́" },
+  ["ĺ"]={ "l","́" },
+  ["Ļ"]={ "L","̧" },
+  ["ļ"]={ "l","̧" },
+  ["Ľ"]={ "L","̌" },
+  ["ľ"]={ "l","̌" },
+  ["Ń"]={ "N","́" },
+  ["ń"]={ "n","́" },
+  ["Ņ"]={ "N","̧" },
+  ["ņ"]={ "n","̧" },
+  ["Ň"]={ "N","̌" },
+  ["ň"]={ "n","̌" },
+  ["Ō"]={ "O","̄" },
+  ["ō"]={ "o","̄" },
+  ["Ŏ"]={ "O","̆" },
+  ["ŏ"]={ "o","̆" },
+  ["Ő"]={ "O","̋" },
+  ["ő"]={ "o","̋" },
+  ["Ŕ"]={ "R","́" },
+  ["ŕ"]={ "r","́" },
+  ["Ŗ"]={ "R","̧" },
+  ["ŗ"]={ "r","̧" },
+  ["Ř"]={ "R","̌" },
+  ["ř"]={ "r","̌" },
+  ["Ś"]={ "S","́" },
+  ["ś"]={ "s","́" },
+  ["Ŝ"]={ "S","̂" },
+  ["ŝ"]={ "s","̂" },
+  ["Ş"]={ "S","̧" },
+  ["ş"]={ "s","̧" },
+  ["Š"]={ "S","̌" },
+  ["š"]={ "s","̌" },
+  ["Ţ"]={ "T","̧" },
+  ["ţ"]={ "t","̧" },
+  ["Ť"]={ "T","̌" },
+  ["ť"]={ "t","̌" },
+  ["Ũ"]={ "U","̃" },
+  ["ũ"]={ "u","̃" },
+  ["Ū"]={ "U","̄" },
+  ["ū"]={ "u","̄" },
+  ["Ŭ"]={ "U","̆" },
+  ["ŭ"]={ "u","̆" },
+  ["Ů"]={ "U","̊" },
+  ["ů"]={ "u","̊" },
+  ["Ű"]={ "U","̋" },
+  ["ű"]={ "u","̋" },
+  ["Ų"]={ "U","̨" },
+  ["ų"]={ "u","̨" },
+  ["Ŵ"]={ "W","̂" },
+  ["ŵ"]={ "w","̂" },
+  ["Ŷ"]={ "Y","̂" },
+  ["ŷ"]={ "y","̂" },
+  ["Ÿ"]={ "Y","̈" },
+  ["Ź"]={ "Z","́" },
+  ["ź"]={ "z","́" },
+  ["Ż"]={ "Z","̇" },
+  ["ż"]={ "z","̇" },
+  ["Ž"]={ "Z","̌" },
+  ["ž"]={ "z","̌" },
+  ["Ơ"]={ "O","̛" },
+  ["ơ"]={ "o","̛" },
+  ["Ư"]={ "U","̛" },
+  ["ư"]={ "u","̛" },
+  ["Ǎ"]={ "A","̌" },
+  ["ǎ"]={ "a","̌" },
+  ["Ǐ"]={ "I","̌" },
+  ["ǐ"]={ "i","̌" },
+  ["Ǒ"]={ "O","̌" },
+  ["ǒ"]={ "o","̌" },
+  ["Ǔ"]={ "U","̌" },
+  ["ǔ"]={ "u","̌" },
+  ["Ǖ"]={ "Ü","̄" },
+  ["ǖ"]={ "ü","̄" },
+  ["Ǘ"]={ "Ü","́" },
+  ["ǘ"]={ "ü","́" },
+  ["Ǚ"]={ "Ü","̌" },
+  ["ǚ"]={ "ü","̌" },
+  ["Ǜ"]={ "Ü","̀" },
+  ["ǜ"]={ "ü","̀" },
+  ["Ǟ"]={ "Ä","̄" },
+  ["ǟ"]={ "ä","̄" },
+  ["Ǡ"]={ "Ȧ","̄" },
+  ["ǡ"]={ "ȧ","̄" },
+  ["Ǣ"]={ "Æ","̄" },
+  ["ǣ"]={ "æ","̄" },
+  ["Ǧ"]={ "G","̌" },
+  ["ǧ"]={ "g","̌" },
+  ["Ǩ"]={ "K","̌" },
+  ["ǩ"]={ "k","̌" },
+  ["Ǫ"]={ "O","̨" },
+  ["ǫ"]={ "o","̨" },
+  ["Ǭ"]={ "Ǫ","̄" },
+  ["ǭ"]={ "ǫ","̄" },
+  ["Ǯ"]={ "Ʒ","̌" },
+  ["ǯ"]={ "ʒ","̌" },
+  ["ǰ"]={ "j","̌" },
+  ["Ǵ"]={ "G","́" },
+  ["ǵ"]={ "g","́" },
+  ["Ǹ"]={ "N","̀" },
+  ["ǹ"]={ "n","̀" },
+  ["Ǻ"]={ "Å","́" },
+  ["ǻ"]={ "å","́" },
+  ["Ǽ"]={ "Æ","́" },
+  ["ǽ"]={ "æ","́" },
+  ["Ǿ"]={ "Ø","́" },
+  ["ǿ"]={ "ø","́" },
+  ["Ȁ"]={ "A","̏" },
+  ["ȁ"]={ "a","̏" },
+  ["Ȃ"]={ "A","̑" },
+  ["ȃ"]={ "a","̑" },
+  ["Ȅ"]={ "E","̏" },
+  ["ȅ"]={ "e","̏" },
+  ["Ȇ"]={ "E","̑" },
+  ["ȇ"]={ "e","̑" },
+  ["Ȉ"]={ "I","̏" },
+  ["ȉ"]={ "i","̏" },
+  ["Ȋ"]={ "I","̑" },
+  ["ȋ"]={ "i","̑" },
+  ["Ȍ"]={ "O","̏" },
+  ["ȍ"]={ "o","̏" },
+  ["Ȏ"]={ "O","̑" },
+  ["ȏ"]={ "o","̑" },
+  ["Ȑ"]={ "R","̏" },
+  ["ȑ"]={ "r","̏" },
+  ["Ȓ"]={ "R","̑" },
+  ["ȓ"]={ "r","̑" },
+  ["Ȕ"]={ "U","̏" },
+  ["ȕ"]={ "u","̏" },
+  ["Ȗ"]={ "U","̑" },
+  ["ȗ"]={ "u","̑" },
+  ["Ș"]={ "S","̦" },
+  ["ș"]={ "s","̦" },
+  ["Ț"]={ "T","̦" },
+  ["ț"]={ "t","̦" },
+  ["Ȟ"]={ "H","̌" },
+  ["ȟ"]={ "h","̌" },
+  ["Ȧ"]={ "A","̇" },
+  ["ȧ"]={ "a","̇" },
+  ["Ȩ"]={ "E","̧" },
+  ["ȩ"]={ "e","̧" },
+  ["Ȫ"]={ "Ö","̄" },
+  ["ȫ"]={ "ö","̄" },
+  ["Ȭ"]={ "Õ","̄" },
+  ["ȭ"]={ "õ","̄" },
+  ["Ȯ"]={ "O","̇" },
+  ["ȯ"]={ "o","̇" },
+  ["Ȱ"]={ "Ȯ","̄" },
+  ["ȱ"]={ "ȯ","̄" },
+  ["Ȳ"]={ "Y","̄" },
+  ["ȳ"]={ "y","̄" },
+  ["̈́"]={ "̈","́" },
+  ["΅"]={ "¨","́" },
+  ["Ά"]={ "Α","́" },
+  ["Έ"]={ "Ε","́" },
+  ["Ή"]={ "Η","́" },
+  ["Ί"]={ "Ι","́" },
+  ["Ό"]={ "Ο","́" },
+  ["Ύ"]={ "Υ","́" },
+  ["Ώ"]={ "Ω","́" },
+  ["ΐ"]={ "ϊ","́" },
+  ["Ϊ"]={ "Ι","̈" },
+  ["Ϋ"]={ "Υ","̈" },
+  ["ά"]={ "α","́" },
+  ["έ"]={ "ε","́" },
+  ["ή"]={ "η","́" },
+  ["ί"]={ "ι","́" },
+  ["ΰ"]={ "ϋ","́" },
+  ["ϊ"]={ "ι","̈" },
+  ["ϋ"]={ "υ","̈" },
+  ["ό"]={ "ο","́" },
+  ["ύ"]={ "υ","́" },
+  ["ώ"]={ "ω","́" },
+  ["ϓ"]={ "ϒ","́" },
+  ["ϔ"]={ "ϒ","̈" },
+  ["Ѐ"]={ "Е","̀" },
+  ["Ё"]={ "Е","̈" },
+  ["Ѓ"]={ "Г","́" },
+  ["Ї"]={ "І","̈" },
+  ["Ќ"]={ "К","́" },
+  ["Ѝ"]={ "И","̀" },
+  ["Ў"]={ "У","̆" },
+  ["Й"]={ "И","̆" },
+  ["й"]={ "и","̆" },
+  ["ѐ"]={ "е","̀" },
+  ["ё"]={ "е","̈" },
+  ["ѓ"]={ "г","́" },
+  ["ї"]={ "і","̈" },
+  ["ќ"]={ "к","́" },
+  ["ѝ"]={ "и","̀" },
+  ["ў"]={ "у","̆" },
+  ["Ѷ"]={ "Ѵ","̏" },
+  ["ѷ"]={ "ѵ","̏" },
+  ["Ӂ"]={ "Ж","̆" },
+  ["ӂ"]={ "ж","̆" },
+  ["Ӑ"]={ "А","̆" },
+  ["ӑ"]={ "а","̆" },
+  ["Ӓ"]={ "А","̈" },
+  ["ӓ"]={ "а","̈" },
+  ["Ӗ"]={ "Е","̆" },
+  ["ӗ"]={ "е","̆" },
+  ["Ӛ"]={ "Ә","̈" },
+  ["ӛ"]={ "ә","̈" },
+  ["Ӝ"]={ "Ж","̈" },
+  ["ӝ"]={ "ж","̈" },
+  ["Ӟ"]={ "З","̈" },
+  ["ӟ"]={ "з","̈" },
+  ["Ӣ"]={ "И","̄" },
+  ["ӣ"]={ "и","̄" },
+  ["Ӥ"]={ "И","̈" },
+  ["ӥ"]={ "и","̈" },
+  ["Ӧ"]={ "О","̈" },
+  ["ӧ"]={ "о","̈" },
+  ["Ӫ"]={ "Ө","̈" },
+  ["ӫ"]={ "ө","̈" },
+  ["Ӭ"]={ "Э","̈" },
+  ["ӭ"]={ "э","̈" },
+  ["Ӯ"]={ "У","̄" },
+  ["ӯ"]={ "у","̄" },
+  ["Ӱ"]={ "У","̈" },
+  ["ӱ"]={ "у","̈" },
+  ["Ӳ"]={ "У","̋" },
+  ["ӳ"]={ "у","̋" },
+  ["Ӵ"]={ "Ч","̈" },
+  ["ӵ"]={ "ч","̈" },
+  ["Ӹ"]={ "Ы","̈" },
+  ["ӹ"]={ "ы","̈" },
+  ["آ"]={ "ا","ٓ" },
+  ["أ"]={ "ا","ٔ" },
+  ["ؤ"]={ "و","ٔ" },
+  ["إ"]={ "ا","ٕ" },
+  ["ئ"]={ "ي","ٔ" },
+  ["ۀ"]={ "ە","ٔ" },
+  ["ۂ"]={ "ہ","ٔ" },
+  ["ۓ"]={ "ے","ٔ" },
+  ["ऩ"]={ "न","़" },
+  ["ऱ"]={ "र","़" },
+  ["ऴ"]={ "ळ","़" },
+  ["क़"]={ "क","़" },
+  ["ख़"]={ "ख","़" },
+  ["ग़"]={ "ग","़" },
+  ["ज़"]={ "ज","़" },
+  ["ड़"]={ "ड","़" },
+  ["ढ़"]={ "ढ","़" },
+  ["फ़"]={ "फ","़" },
+  ["य़"]={ "य","़" },
+  ["ো"]={ "ে","া" },
+  ["ৌ"]={ "ে","ৗ" },
+  ["ড়"]={ "ড","়" },
+  ["ঢ়"]={ "ঢ","়" },
+  ["য়"]={ "য","়" },
+  ["ਲ਼"]={ "ਲ","਼" },
+  ["ਸ਼"]={ "ਸ","਼" },
+  ["ਖ਼"]={ "ਖ","਼" },
+  ["ਗ਼"]={ "ਗ","਼" },
+  ["ਜ਼"]={ "ਜ","਼" },
+  ["ਫ਼"]={ "ਫ","਼" },
+  ["ୈ"]={ "େ","ୖ" },
+  ["ୋ"]={ "େ","ା" },
+  ["ୌ"]={ "େ","ୗ" },
+  ["ଡ଼"]={ "ଡ","଼" },
+  ["ଢ଼"]={ "ଢ","଼" },
+  ["ஔ"]={ "ஒ","ௗ" },
+  ["ொ"]={ "ெ","ா" },
+  ["ோ"]={ "ே","ா" },
+  ["ௌ"]={ "ெ","ௗ" },
+  ["ై"]={ "ె","ౖ" },
+  ["ೀ"]={ "ಿ","ೕ" },
+  ["ೇ"]={ "ೆ","ೕ" },
+  ["ೈ"]={ "ೆ","ೖ" },
+  ["ೊ"]={ "ೆ","ೂ" },
+  ["ೋ"]={ "ೊ","ೕ" },
+  ["ൊ"]={ "െ","ാ" },
+  ["ോ"]={ "േ","ാ" },
+  ["ൌ"]={ "െ","ൗ" },
+  ["ේ"]={ "ෙ","්" },
+  ["ො"]={ "ෙ","ා" },
+  ["ෝ"]={ "ො","්" },
+  ["ෞ"]={ "ෙ","ෟ" },
+  ["གྷ"]={ "ག","ྷ" },
+  ["ཌྷ"]={ "ཌ","ྷ" },
+  ["དྷ"]={ "ད","ྷ" },
+  ["བྷ"]={ "བ","ྷ" },
+  ["ཛྷ"]={ "ཛ","ྷ" },
+  ["ཀྵ"]={ "ཀ","ྵ" },
+  ["ཱི"]={ "ཱ","ི" },
+  ["ཱུ"]={ "ཱ","ུ" },
+  ["ྲྀ"]={ "ྲ","ྀ" },
+  ["ླྀ"]={ "ླ","ྀ" },
+  ["ཱྀ"]={ "ཱ","ྀ" },
+  ["ྒྷ"]={ "ྒ","ྷ" },
+  ["ྜྷ"]={ "ྜ","ྷ" },
+  ["ྡྷ"]={ "ྡ","ྷ" },
+  ["ྦྷ"]={ "ྦ","ྷ" },
+  ["ྫྷ"]={ "ྫ","ྷ" },
+  ["ྐྵ"]={ "ྐ","ྵ" },
+  ["ဦ"]={ "ဥ","ီ" },
+  ["ᬆ"]={ "ᬅ","ᬵ" },
+  ["ᬈ"]={ "ᬇ","ᬵ" },
+  ["ᬊ"]={ "ᬉ","ᬵ" },
+  ["ᬌ"]={ "ᬋ","ᬵ" },
+  ["ᬎ"]={ "ᬍ","ᬵ" },
+  ["ᬒ"]={ "ᬑ","ᬵ" },
+  ["ᬻ"]={ "ᬺ","ᬵ" },
+  ["ᬽ"]={ "ᬼ","ᬵ" },
+  ["ᭀ"]={ "ᬾ","ᬵ" },
+  ["ᭁ"]={ "ᬿ","ᬵ" },
+  ["ᭃ"]={ "ᭂ","ᬵ" },
+  ["Ḁ"]={ "A","̥" },
+  ["ḁ"]={ "a","̥" },
+  ["Ḃ"]={ "B","̇" },
+  ["ḃ"]={ "b","̇" },
+  ["Ḅ"]={ "B","̣" },
+  ["ḅ"]={ "b","̣" },
+  ["Ḇ"]={ "B","̱" },
+  ["ḇ"]={ "b","̱" },
+  ["Ḉ"]={ "Ç","́" },
+  ["ḉ"]={ "ç","́" },
+  ["Ḋ"]={ "D","̇" },
+  ["ḋ"]={ "d","̇" },
+  ["Ḍ"]={ "D","̣" },
+  ["ḍ"]={ "d","̣" },
+  ["Ḏ"]={ "D","̱" },
+  ["ḏ"]={ "d","̱" },
+  ["Ḑ"]={ "D","̧" },
+  ["ḑ"]={ "d","̧" },
+  ["Ḓ"]={ "D","̭" },
+  ["ḓ"]={ "d","̭" },
+  ["Ḕ"]={ "Ē","̀" },
+  ["ḕ"]={ "ē","̀" },
+  ["Ḗ"]={ "Ē","́" },
+  ["ḗ"]={ "ē","́" },
+  ["Ḙ"]={ "E","̭" },
+  ["ḙ"]={ "e","̭" },
+  ["Ḛ"]={ "E","̰" },
+  ["ḛ"]={ "e","̰" },
+  ["Ḝ"]={ "Ȩ","̆" },
+  ["ḝ"]={ "ȩ","̆" },
+  ["Ḟ"]={ "F","̇" },
+  ["ḟ"]={ "f","̇" },
+  ["Ḡ"]={ "G","̄" },
+  ["ḡ"]={ "g","̄" },
+  ["Ḣ"]={ "H","̇" },
+  ["ḣ"]={ "h","̇" },
+  ["Ḥ"]={ "H","̣" },
+  ["ḥ"]={ "h","̣" },
+  ["Ḧ"]={ "H","̈" },
+  ["ḧ"]={ "h","̈" },
+  ["Ḩ"]={ "H","̧" },
+  ["ḩ"]={ "h","̧" },
+  ["Ḫ"]={ "H","̮" },
+  ["ḫ"]={ "h","̮" },
+  ["Ḭ"]={ "I","̰" },
+  ["ḭ"]={ "i","̰" },
+  ["Ḯ"]={ "Ï","́" },
+  ["ḯ"]={ "ï","́" },
+  ["Ḱ"]={ "K","́" },
+  ["ḱ"]={ "k","́" },
+  ["Ḳ"]={ "K","̣" },
+  ["ḳ"]={ "k","̣" },
+  ["Ḵ"]={ "K","̱" },
+  ["ḵ"]={ "k","̱" },
+  ["Ḷ"]={ "L","̣" },
+  ["ḷ"]={ "l","̣" },
+  ["Ḹ"]={ "Ḷ","̄" },
+  ["ḹ"]={ "ḷ","̄" },
+  ["Ḻ"]={ "L","̱" },
+  ["ḻ"]={ "l","̱" },
+  ["Ḽ"]={ "L","̭" },
+  ["ḽ"]={ "l","̭" },
+  ["Ḿ"]={ "M","́" },
+  ["ḿ"]={ "m","́" },
+  ["Ṁ"]={ "M","̇" },
+  ["ṁ"]={ "m","̇" },
+  ["Ṃ"]={ "M","̣" },
+  ["ṃ"]={ "m","̣" },
+  ["Ṅ"]={ "N","̇" },
+  ["ṅ"]={ "n","̇" },
+  ["Ṇ"]={ "N","̣" },
+  ["ṇ"]={ "n","̣" },
+  ["Ṉ"]={ "N","̱" },
+  ["ṉ"]={ "n","̱" },
+  ["Ṋ"]={ "N","̭" },
+  ["ṋ"]={ "n","̭" },
+  ["Ṍ"]={ "Õ","́" },
+  ["ṍ"]={ "õ","́" },
+  ["Ṏ"]={ "Õ","̈" },
+  ["ṏ"]={ "õ","̈" },
+  ["Ṑ"]={ "Ō","̀" },
+  ["ṑ"]={ "ō","̀" },
+  ["Ṓ"]={ "Ō","́" },
+  ["ṓ"]={ "ō","́" },
+  ["Ṕ"]={ "P","́" },
+  ["ṕ"]={ "p","́" },
+  ["Ṗ"]={ "P","̇" },
+  ["ṗ"]={ "p","̇" },
+  ["Ṙ"]={ "R","̇" },
+  ["ṙ"]={ "r","̇" },
+  ["Ṛ"]={ "R","̣" },
+  ["ṛ"]={ "r","̣" },
+  ["Ṝ"]={ "Ṛ","̄" },
+  ["ṝ"]={ "ṛ","̄" },
+  ["Ṟ"]={ "R","̱" },
+  ["ṟ"]={ "r","̱" },
+  ["Ṡ"]={ "S","̇" },
+  ["ṡ"]={ "s","̇" },
+  ["Ṣ"]={ "S","̣" },
+  ["ṣ"]={ "s","̣" },
+  ["Ṥ"]={ "Ś","̇" },
+  ["ṥ"]={ "ś","̇" },
+  ["Ṧ"]={ "Š","̇" },
+  ["ṧ"]={ "š","̇" },
+  ["Ṩ"]={ "Ṣ","̇" },
+  ["ṩ"]={ "ṣ","̇" },
+  ["Ṫ"]={ "T","̇" },
+  ["ṫ"]={ "t","̇" },
+  ["Ṭ"]={ "T","̣" },
+  ["ṭ"]={ "t","̣" },
+  ["Ṯ"]={ "T","̱" },
+  ["ṯ"]={ "t","̱" },
+  ["Ṱ"]={ "T","̭" },
+  ["ṱ"]={ "t","̭" },
+  ["Ṳ"]={ "U","̤" },
+  ["ṳ"]={ "u","̤" },
+  ["Ṵ"]={ "U","̰" },
+  ["ṵ"]={ "u","̰" },
+  ["Ṷ"]={ "U","̭" },
+  ["ṷ"]={ "u","̭" },
+  ["Ṹ"]={ "Ũ","́" },
+  ["ṹ"]={ "ũ","́" },
+  ["Ṻ"]={ "Ū","̈" },
+  ["ṻ"]={ "ū","̈" },
+  ["Ṽ"]={ "V","̃" },
+  ["ṽ"]={ "v","̃" },
+  ["Ṿ"]={ "V","̣" },
+  ["ṿ"]={ "v","̣" },
+  ["Ẁ"]={ "W","̀" },
+  ["ẁ"]={ "w","̀" },
+  ["Ẃ"]={ "W","́" },
+  ["ẃ"]={ "w","́" },
+  ["Ẅ"]={ "W","̈" },
+  ["ẅ"]={ "w","̈" },
+  ["Ẇ"]={ "W","̇" },
+  ["ẇ"]={ "w","̇" },
+  ["Ẉ"]={ "W","̣" },
+  ["ẉ"]={ "w","̣" },
+  ["Ẋ"]={ "X","̇" },
+  ["ẋ"]={ "x","̇" },
+  ["Ẍ"]={ "X","̈" },
+  ["ẍ"]={ "x","̈" },
+  ["Ẏ"]={ "Y","̇" },
+  ["ẏ"]={ "y","̇" },
+  ["Ẑ"]={ "Z","̂" },
+  ["ẑ"]={ "z","̂" },
+  ["Ẓ"]={ "Z","̣" },
+  ["ẓ"]={ "z","̣" },
+  ["Ẕ"]={ "Z","̱" },
+  ["ẕ"]={ "z","̱" },
+  ["ẖ"]={ "h","̱" },
+  ["ẗ"]={ "t","̈" },
+  ["ẘ"]={ "w","̊" },
+  ["ẙ"]={ "y","̊" },
+  ["ẛ"]={ "ſ","̇" },
+  ["Ạ"]={ "A","̣" },
+  ["ạ"]={ "a","̣" },
+  ["Ả"]={ "A","̉" },
+  ["ả"]={ "a","̉" },
+  ["Ấ"]={ "Â","́" },
+  ["ấ"]={ "â","́" },
+  ["Ầ"]={ "Â","̀" },
+  ["ầ"]={ "â","̀" },
+  ["Ẩ"]={ "Â","̉" },
+  ["ẩ"]={ "â","̉" },
+  ["Ẫ"]={ "Â","̃" },
+  ["ẫ"]={ "â","̃" },
+  ["Ậ"]={ "Ạ","̂" },
+  ["ậ"]={ "ạ","̂" },
+  ["Ắ"]={ "Ă","́" },
+  ["ắ"]={ "ă","́" },
+  ["Ằ"]={ "Ă","̀" },
+  ["ằ"]={ "ă","̀" },
+  ["Ẳ"]={ "Ă","̉" },
+  ["ẳ"]={ "ă","̉" },
+  ["Ẵ"]={ "Ă","̃" },
+  ["ẵ"]={ "ă","̃" },
+  ["Ặ"]={ "Ạ","̆" },
+  ["ặ"]={ "ạ","̆" },
+  ["Ẹ"]={ "E","̣" },
+  ["ẹ"]={ "e","̣" },
+  ["Ẻ"]={ "E","̉" },
+  ["ẻ"]={ "e","̉" },
+  ["Ẽ"]={ "E","̃" },
+  ["ẽ"]={ "e","̃" },
+  ["Ế"]={ "Ê","́" },
+  ["ế"]={ "ê","́" },
+  ["Ề"]={ "Ê","̀" },
+  ["ề"]={ "ê","̀" },
+  ["Ể"]={ "Ê","̉" },
+  ["ể"]={ "ê","̉" },
+  ["Ễ"]={ "Ê","̃" },
+  ["ễ"]={ "ê","̃" },
+  ["Ệ"]={ "Ẹ","̂" },
+  ["ệ"]={ "ẹ","̂" },
+  ["Ỉ"]={ "I","̉" },
+  ["ỉ"]={ "i","̉" },
+  ["Ị"]={ "I","̣" },
+  ["ị"]={ "i","̣" },
+  ["Ọ"]={ "O","̣" },
+  ["ọ"]={ "o","̣" },
+  ["Ỏ"]={ "O","̉" },
+  ["ỏ"]={ "o","̉" },
+  ["Ố"]={ "Ô","́" },
+  ["ố"]={ "ô","́" },
+  ["Ồ"]={ "Ô","̀" },
+  ["ồ"]={ "ô","̀" },
+  ["Ổ"]={ "Ô","̉" },
+  ["ổ"]={ "ô","̉" },
+  ["Ỗ"]={ "Ô","̃" },
+  ["ỗ"]={ "ô","̃" },
+  ["Ộ"]={ "Ọ","̂" },
+  ["ộ"]={ "ọ","̂" },
+  ["Ớ"]={ "Ơ","́" },
+  ["ớ"]={ "ơ","́" },
+  ["Ờ"]={ "Ơ","̀" },
+  ["ờ"]={ "ơ","̀" },
+  ["Ở"]={ "Ơ","̉" },
+  ["ở"]={ "ơ","̉" },
+  ["Ỡ"]={ "Ơ","̃" },
+  ["ỡ"]={ "ơ","̃" },
+  ["Ợ"]={ "Ơ","̣" },
+  ["ợ"]={ "ơ","̣" },
+  ["Ụ"]={ "U","̣" },
+  ["ụ"]={ "u","̣" },
+  ["Ủ"]={ "U","̉" },
+  ["ủ"]={ "u","̉" },
+  ["Ứ"]={ "Ư","́" },
+  ["ứ"]={ "ư","́" },
+  ["Ừ"]={ "Ư","̀" },
+  ["ừ"]={ "ư","̀" },
+  ["Ử"]={ "Ư","̉" },
+  ["ử"]={ "ư","̉" },
+  ["Ữ"]={ "Ư","̃" },
+  ["ữ"]={ "ư","̃" },
+  ["Ự"]={ "Ư","̣" },
+  ["ự"]={ "ư","̣" },
+  ["Ỳ"]={ "Y","̀" },
+  ["ỳ"]={ "y","̀" },
+  ["Ỵ"]={ "Y","̣" },
+  ["ỵ"]={ "y","̣" },
+  ["Ỷ"]={ "Y","̉" },
+  ["ỷ"]={ "y","̉" },
+  ["Ỹ"]={ "Y","̃" },
+  ["ỹ"]={ "y","̃" },
+  ["ἀ"]={ "α","̓" },
+  ["ἁ"]={ "α","̔" },
+  ["ἂ"]={ "ἀ","̀" },
+  ["ἃ"]={ "ἁ","̀" },
+  ["ἄ"]={ "ἀ","́" },
+  ["ἅ"]={ "ἁ","́" },
+  ["ἆ"]={ "ἀ","͂" },
+  ["ἇ"]={ "ἁ","͂" },
+  ["Ἀ"]={ "Α","̓" },
+  ["Ἁ"]={ "Α","̔" },
+  ["Ἂ"]={ "Ἀ","̀" },
+  ["Ἃ"]={ "Ἁ","̀" },
+  ["Ἄ"]={ "Ἀ","́" },
+  ["Ἅ"]={ "Ἁ","́" },
+  ["Ἆ"]={ "Ἀ","͂" },
+  ["Ἇ"]={ "Ἁ","͂" },
+  ["ἐ"]={ "ε","̓" },
+  ["ἑ"]={ "ε","̔" },
+  ["ἒ"]={ "ἐ","̀" },
+  ["ἓ"]={ "ἑ","̀" },
+  ["ἔ"]={ "ἐ","́" },
+  ["ἕ"]={ "ἑ","́" },
+  ["Ἐ"]={ "Ε","̓" },
+  ["Ἑ"]={ "Ε","̔" },
+  ["Ἒ"]={ "Ἐ","̀" },
+  ["Ἓ"]={ "Ἑ","̀" },
+  ["Ἔ"]={ "Ἐ","́" },
+  ["Ἕ"]={ "Ἑ","́" },
+  ["ἠ"]={ "η","̓" },
+  ["ἡ"]={ "η","̔" },
+  ["ἢ"]={ "ἠ","̀" },
+  ["ἣ"]={ "ἡ","̀" },
+  ["ἤ"]={ "ἠ","́" },
+  ["ἥ"]={ "ἡ","́" },
+  ["ἦ"]={ "ἠ","͂" },
+  ["ἧ"]={ "ἡ","͂" },
+  ["Ἠ"]={ "Η","̓" },
+  ["Ἡ"]={ "Η","̔" },
+  ["Ἢ"]={ "Ἠ","̀" },
+  ["Ἣ"]={ "Ἡ","̀" },
+  ["Ἤ"]={ "Ἠ","́" },
+  ["Ἥ"]={ "Ἡ","́" },
+  ["Ἦ"]={ "Ἠ","͂" },
+  ["Ἧ"]={ "Ἡ","͂" },
+  ["ἰ"]={ "ι","̓" },
+  ["ἱ"]={ "ι","̔" },
+  ["ἲ"]={ "ἰ","̀" },
+  ["ἳ"]={ "ἱ","̀" },
+  ["ἴ"]={ "ἰ","́" },
+  ["ἵ"]={ "ἱ","́" },
+  ["ἶ"]={ "ἰ","͂" },
+  ["ἷ"]={ "ἱ","͂" },
+  ["Ἰ"]={ "Ι","̓" },
+  ["Ἱ"]={ "Ι","̔" },
+  ["Ἲ"]={ "Ἰ","̀" },
+  ["Ἳ"]={ "Ἱ","̀" },
+  ["Ἴ"]={ "Ἰ","́" },
+  ["Ἵ"]={ "Ἱ","́" },
+  ["Ἶ"]={ "Ἰ","͂" },
+  ["Ἷ"]={ "Ἱ","͂" },
+  ["ὀ"]={ "ο","̓" },
+  ["ὁ"]={ "ο","̔" },
+  ["ὂ"]={ "ὀ","̀" },
+  ["ὃ"]={ "ὁ","̀" },
+  ["ὄ"]={ "ὀ","́" },
+  ["ὅ"]={ "ὁ","́" },
+  ["Ὀ"]={ "Ο","̓" },
+  ["Ὁ"]={ "Ο","̔" },
+  ["Ὂ"]={ "Ὀ","̀" },
+  ["Ὃ"]={ "Ὁ","̀" },
+  ["Ὄ"]={ "Ὀ","́" },
+  ["Ὅ"]={ "Ὁ","́" },
+  ["ὐ"]={ "υ","̓" },
+  ["ὑ"]={ "υ","̔" },
+  ["ὒ"]={ "ὐ","̀" },
+  ["ὓ"]={ "ὑ","̀" },
+  ["ὔ"]={ "ὐ","́" },
+  ["ὕ"]={ "ὑ","́" },
+  ["ὖ"]={ "ὐ","͂" },
+  ["ὗ"]={ "ὑ","͂" },
+  ["Ὑ"]={ "Υ","̔" },
+  ["Ὓ"]={ "Ὑ","̀" },
+  ["Ὕ"]={ "Ὑ","́" },
+  ["Ὗ"]={ "Ὑ","͂" },
+  ["ὠ"]={ "ω","̓" },
+  ["ὡ"]={ "ω","̔" },
+  ["ὢ"]={ "ὠ","̀" },
+  ["ὣ"]={ "ὡ","̀" },
+  ["ὤ"]={ "ὠ","́" },
+  ["ὥ"]={ "ὡ","́" },
+  ["ὦ"]={ "ὠ","͂" },
+  ["ὧ"]={ "ὡ","͂" },
+  ["Ὠ"]={ "Ω","̓" },
+  ["Ὡ"]={ "Ω","̔" },
+  ["Ὢ"]={ "Ὠ","̀" },
+  ["Ὣ"]={ "Ὡ","̀" },
+  ["Ὤ"]={ "Ὠ","́" },
+  ["Ὥ"]={ "Ὡ","́" },
+  ["Ὦ"]={ "Ὠ","͂" },
+  ["Ὧ"]={ "Ὡ","͂" },
+  ["ὰ"]={ "α","̀" },
+  ["ὲ"]={ "ε","̀" },
+  ["ὴ"]={ "η","̀" },
+  ["ὶ"]={ "ι","̀" },
+  ["ὸ"]={ "ο","̀" },
+  ["ὺ"]={ "υ","̀" },
+  ["ὼ"]={ "ω","̀" },
+  ["ᾀ"]={ "ἀ","ͅ" },
+  ["ᾁ"]={ "ἁ","ͅ" },
+  ["ᾂ"]={ "ἂ","ͅ" },
+  ["ᾃ"]={ "ἃ","ͅ" },
+  ["ᾄ"]={ "ἄ","ͅ" },
+  ["ᾅ"]={ "ἅ","ͅ" },
+  ["ᾆ"]={ "ἆ","ͅ" },
+  ["ᾇ"]={ "ἇ","ͅ" },
+  ["ᾈ"]={ "Ἀ","ͅ" },
+  ["ᾉ"]={ "Ἁ","ͅ" },
+  ["ᾊ"]={ "Ἂ","ͅ" },
+  ["ᾋ"]={ "Ἃ","ͅ" },
+  ["ᾌ"]={ "Ἄ","ͅ" },
+  ["ᾍ"]={ "Ἅ","ͅ" },
+  ["ᾎ"]={ "Ἆ","ͅ" },
+  ["ᾏ"]={ "Ἇ","ͅ" },
+  ["ᾐ"]={ "ἠ","ͅ" },
+  ["ᾑ"]={ "ἡ","ͅ" },
+  ["ᾒ"]={ "ἢ","ͅ" },
+  ["ᾓ"]={ "ἣ","ͅ" },
+  ["ᾔ"]={ "ἤ","ͅ" },
+  ["ᾕ"]={ "ἥ","ͅ" },
+  ["ᾖ"]={ "ἦ","ͅ" },
+  ["ᾗ"]={ "ἧ","ͅ" },
+  ["ᾘ"]={ "Ἠ","ͅ" },
+  ["ᾙ"]={ "Ἡ","ͅ" },
+  ["ᾚ"]={ "Ἢ","ͅ" },
+  ["ᾛ"]={ "Ἣ","ͅ" },
+  ["ᾜ"]={ "Ἤ","ͅ" },
+  ["ᾝ"]={ "Ἥ","ͅ" },
+  ["ᾞ"]={ "Ἦ","ͅ" },
+  ["ᾟ"]={ "Ἧ","ͅ" },
+  ["ᾠ"]={ "ὠ","ͅ" },
+  ["ᾡ"]={ "ὡ","ͅ" },
+  ["ᾢ"]={ "ὢ","ͅ" },
+  ["ᾣ"]={ "ὣ","ͅ" },
+  ["ᾤ"]={ "ὤ","ͅ" },
+  ["ᾥ"]={ "ὥ","ͅ" },
+  ["ᾦ"]={ "ὦ","ͅ" },
+  ["ᾧ"]={ "ὧ","ͅ" },
+  ["ᾨ"]={ "Ὠ","ͅ" },
+  ["ᾩ"]={ "Ὡ","ͅ" },
+  ["ᾪ"]={ "Ὢ","ͅ" },
+  ["ᾫ"]={ "Ὣ","ͅ" },
+  ["ᾬ"]={ "Ὤ","ͅ" },
+  ["ᾭ"]={ "Ὥ","ͅ" },
+  ["ᾮ"]={ "Ὦ","ͅ" },
+  ["ᾯ"]={ "Ὧ","ͅ" },
+  ["ᾰ"]={ "α","̆" },
+  ["ᾱ"]={ "α","̄" },
+  ["ᾲ"]={ "ὰ","ͅ" },
+  ["ᾳ"]={ "α","ͅ" },
+  ["ᾴ"]={ "ά","ͅ" },
+  ["ᾶ"]={ "α","͂" },
+  ["ᾷ"]={ "ᾶ","ͅ" },
+  ["Ᾰ"]={ "Α","̆" },
+  ["Ᾱ"]={ "Α","̄" },
+  ["Ὰ"]={ "Α","̀" },
+  ["ᾼ"]={ "Α","ͅ" },
+  ["῁"]={ "¨","͂" },
+  ["ῂ"]={ "ὴ","ͅ" },
+  ["ῃ"]={ "η","ͅ" },
+  ["ῄ"]={ "ή","ͅ" },
+  ["ῆ"]={ "η","͂" },
+  ["ῇ"]={ "ῆ","ͅ" },
+  ["Ὲ"]={ "Ε","̀" },
+  ["Ὴ"]={ "Η","̀" },
+  ["ῌ"]={ "Η","ͅ" },
+  ["῍"]={ "᾿","̀" },
+  ["῎"]={ "᾿","́" },
+  ["῏"]={ "᾿","͂" },
+  ["ῐ"]={ "ι","̆" },
+  ["ῑ"]={ "ι","̄" },
+  ["ῒ"]={ "ϊ","̀" },
+  ["ῖ"]={ "ι","͂" },
+  ["ῗ"]={ "ϊ","͂" },
+  ["Ῐ"]={ "Ι","̆" },
+  ["Ῑ"]={ "Ι","̄" },
+  ["Ὶ"]={ "Ι","̀" },
+  ["῝"]={ "῾","̀" },
+  ["῞"]={ "῾","́" },
+  ["῟"]={ "῾","͂" },
+  ["ῠ"]={ "υ","̆" },
+  ["ῡ"]={ "υ","̄" },
+  ["ῢ"]={ "ϋ","̀" },
+  ["ῤ"]={ "ρ","̓" },
+  ["ῥ"]={ "ρ","̔" },
+  ["ῦ"]={ "υ","͂" },
+  ["ῧ"]={ "ϋ","͂" },
+  ["Ῠ"]={ "Υ","̆" },
+  ["Ῡ"]={ "Υ","̄" },
+  ["Ὺ"]={ "Υ","̀" },
+  ["Ῥ"]={ "Ρ","̔" },
+  ["῭"]={ "¨","̀" },
+  ["ῲ"]={ "ὼ","ͅ" },
+  ["ῳ"]={ "ω","ͅ" },
+  ["ῴ"]={ "ώ","ͅ" },
+  ["ῶ"]={ "ω","͂" },
+  ["ῷ"]={ "ῶ","ͅ" },
+  ["Ὸ"]={ "Ο","̀" },
+  ["Ὼ"]={ "Ω","̀" },
+  ["ῼ"]={ "Ω","ͅ" },
+  ["↚"]={ "←","̸" },
+  ["↛"]={ "→","̸" },
+  ["↮"]={ "↔","̸" },
+  ["⇍"]={ "⇐","̸" },
+  ["⇎"]={ "⇔","̸" },
+  ["⇏"]={ "⇒","̸" },
+  ["∄"]={ "∃","̸" },
+  ["∉"]={ "∈","̸" },
+  ["∌"]={ "∋","̸" },
+  ["∤"]={ "∣","̸" },
+  ["∦"]={ "∥","̸" },
+  ["≁"]={ "∼","̸" },
+  ["≄"]={ "≃","̸" },
+  ["≇"]={ "≅","̸" },
+  ["≉"]={ "≈","̸" },
+  ["≠"]={ "=","̸" },
+  ["≢"]={ "≡","̸" },
+  ["≭"]={ "≍","̸" },
+  ["≮"]={ "<","̸" },
+  ["≯"]={ ">","̸" },
+  ["≰"]={ "≤","̸" },
+  ["≱"]={ "≥","̸" },
+  ["≴"]={ "≲","̸" },
+  ["≵"]={ "≳","̸" },
+  ["≸"]={ "≶","̸" },
+  ["≹"]={ "≷","̸" },
+  ["⊀"]={ "≺","̸" },
+  ["⊁"]={ "≻","̸" },
+  ["⊄"]={ "⊂","̸" },
+  ["⊅"]={ "⊃","̸" },
+  ["⊈"]={ "⊆","̸" },
+  ["⊉"]={ "⊇","̸" },
+  ["⊬"]={ "⊢","̸" },
+  ["⊭"]={ "⊨","̸" },
+  ["⊮"]={ "⊩","̸" },
+  ["⊯"]={ "⊫","̸" },
+  ["⋠"]={ "≼","̸" },
+  ["⋡"]={ "≽","̸" },
+  ["⋢"]={ "⊑","̸" },
+  ["⋣"]={ "⊒","̸" },
+  ["⋪"]={ "⊲","̸" },
+  ["⋫"]={ "⊳","̸" },
+  ["⋬"]={ "⊴","̸" },
+  ["⋭"]={ "⊵","̸" },
+  ["⫝̸"]={ "⫝","̸" },
+  ["が"]={ "か","゙" },
+  ["ぎ"]={ "き","゙" },
+  ["ぐ"]={ "く","゙" },
+  ["げ"]={ "け","゙" },
+  ["ご"]={ "こ","゙" },
+  ["ざ"]={ "さ","゙" },
+  ["じ"]={ "し","゙" },
+  ["ず"]={ "す","゙" },
+  ["ぜ"]={ "せ","゙" },
+  ["ぞ"]={ "そ","゙" },
+  ["だ"]={ "た","゙" },
+  ["ぢ"]={ "ち","゙" },
+  ["づ"]={ "つ","゙" },
+  ["で"]={ "て","゙" },
+  ["ど"]={ "と","゙" },
+  ["ば"]={ "は","゙" },
+  ["ぱ"]={ "は","゚" },
+  ["び"]={ "ひ","゙" },
+  ["ぴ"]={ "ひ","゚" },
+  ["ぶ"]={ "ふ","゙" },
+  ["ぷ"]={ "ふ","゚" },
+  ["べ"]={ "へ","゙" },
+  ["ぺ"]={ "へ","゚" },
+  ["ぼ"]={ "ほ","゙" },
+  ["ぽ"]={ "ほ","゚" },
+  ["ゔ"]={ "う","゙" },
+  ["ゞ"]={ "ゝ","゙" },
+  ["ガ"]={ "カ","゙" },
+  ["ギ"]={ "キ","゙" },
+  ["グ"]={ "ク","゙" },
+  ["ゲ"]={ "ケ","゙" },
+  ["ゴ"]={ "コ","゙" },
+  ["ザ"]={ "サ","゙" },
+  ["ジ"]={ "シ","゙" },
+  ["ズ"]={ "ス","゙" },
+  ["ゼ"]={ "セ","゙" },
+  ["ゾ"]={ "ソ","゙" },
+  ["ダ"]={ "タ","゙" },
+  ["ヂ"]={ "チ","゙" },
+  ["ヅ"]={ "ツ","゙" },
+  ["デ"]={ "テ","゙" },
+  ["ド"]={ "ト","゙" },
+  ["バ"]={ "ハ","゙" },
+  ["パ"]={ "ハ","゚" },
+  ["ビ"]={ "ヒ","゙" },
+  ["ピ"]={ "ヒ","゚" },
+  ["ブ"]={ "フ","゙" },
+  ["プ"]={ "フ","゚" },
+  ["ベ"]={ "ヘ","゙" },
+  ["ペ"]={ "ヘ","゚" },
+  ["ボ"]={ "ホ","゙" },
+  ["ポ"]={ "ホ","゚" },
+  ["ヴ"]={ "ウ","゙" },
+  ["ヷ"]={ "ワ","゙" },
+  ["ヸ"]={ "ヰ","゙" },
+  ["ヹ"]={ "ヱ","゙" },
+  ["ヺ"]={ "ヲ","゙" },
+  ["ヾ"]={ "ヽ","゙" },
+  ["יִ"]={ "י","ִ" },
+  ["ײַ"]={ "ײ","ַ" },
+  ["שׁ"]={ "ש","ׁ" },
+  ["שׂ"]={ "ש","ׂ" },
+  ["שּׁ"]={ "שּ","ׁ" },
+  ["שּׂ"]={ "שּ","ׂ" },
+  ["אַ"]={ "א","ַ" },
+  ["אָ"]={ "א","ָ" },
+  ["אּ"]={ "א","ּ" },
+  ["בּ"]={ "ב","ּ" },
+  ["גּ"]={ "ג","ּ" },
+  ["דּ"]={ "ד","ּ" },
+  ["הּ"]={ "ה","ּ" },
+  ["וּ"]={ "ו","ּ" },
+  ["זּ"]={ "ז","ּ" },
+  ["טּ"]={ "ט","ּ" },
+  ["יּ"]={ "י","ּ" },
+  ["ךּ"]={ "ך","ּ" },
+  ["כּ"]={ "כ","ּ" },
+  ["לּ"]={ "ל","ּ" },
+  ["מּ"]={ "מ","ּ" },
+  ["נּ"]={ "נ","ּ" },
+  ["סּ"]={ "ס","ּ" },
+  ["ףּ"]={ "ף","ּ" },
+  ["פּ"]={ "פ","ּ" },
+  ["צּ"]={ "צ","ּ" },
+  ["קּ"]={ "ק","ּ" },
+  ["רּ"]={ "ר","ּ" },
+  ["שּ"]={ "ש","ּ" },
+  ["תּ"]={ "ת","ּ" },
+  ["וֹ"]={ "ו","ֹ" },
+  ["בֿ"]={ "ב","ֿ" },
+  ["כֿ"]={ "כ","ֿ" },
+  ["פֿ"]={ "פ","ֿ" },
+  ["𑂚"]={ "𑂙","𑂺" },
+  ["𑂜"]={ "𑂛","𑂺" },
+  ["𑂫"]={ "𑂥","𑂺" },
+  ["𑄮"]={ "𑄱","𑄧" },
+  ["𑄯"]={ "𑄲","𑄧" },
+  ["𑍋"]={ "𑍇","𑌾" },
+  ["𑍌"]={ "𑍇","𑍗" },
+  ["𑒻"]={ "𑒹","𑒺" },
+  ["𑒼"]={ "𑒹","𑒰" },
+  ["𑒾"]={ "𑒹","𑒽" },
+  ["𑖺"]={ "𑖸","𑖯" },
+  ["𑖻"]={ "𑖹","𑖯" },
+  ["𝅗𝅥"]={ "𝅗","𝅥" },
+  ["𝅘𝅥"]={ "𝅘","𝅥" },
+  ["𝅘𝅥𝅮"]={ "𝅘𝅥","𝅮" },
+  ["𝅘𝅥𝅯"]={ "𝅘𝅥","𝅯" },
+  ["𝅘𝅥𝅰"]={ "𝅘𝅥","𝅰" },
+  ["𝅘𝅥𝅱"]={ "𝅘𝅥","𝅱" },
+  ["𝅘𝅥𝅲"]={ "𝅘𝅥","𝅲" },
+  ["𝆹𝅥"]={ "𝆹","𝅥" },
+  ["𝆺𝅥"]={ "𝆺","𝅥" },
+  ["𝆹𝅥𝅮"]={ "𝆹𝅥","𝅮" },
+  ["𝆺𝅥𝅮"]={ "𝆺𝅥","𝅮" },
+  ["𝆹𝅥𝅯"]={ "𝆹𝅥","𝅯" },
+  ["𝆺𝅥𝅯"]={ "𝆺𝅥","𝅯" },
+  },
+ },
+ },
+ ["name"]="collapse",
+ ["prepend"]=true,
+ ["type"]="ligature",
+}
+end -- closure
+
+do -- begin closure to overcome local limits and interference
+
+if not modules then modules={} end modules ['font-gbn']={
+  version=1.001,
+  comment="companion to luatex-*.tex",
+  author="Hans Hagen, PRAGMA-ADE, Hasselt NL",
+  copyright="PRAGMA ADE / ConTeXt Development Team",
+  license="see context related readme files"
+}
+if context then
+  texio.write_nl("fatal error: this module is not for context")
+  os.exit()
+end
+local fonts=fonts
+local nodes=nodes
+local nuts=nodes.nuts 
+local traverse_id=nuts.traverse_id
+local flush_node=nuts.flush_node
+local glyph_code=nodes.nodecodes.glyph
+local disc_code=nodes.nodecodes.disc
+local tonode=nuts.tonode
+local tonut=nuts.tonut
+local getfont=nuts.getfont
+local getchar=nuts.getchar
+local getid=nuts.getid
+local getboth=nuts.getboth
+local getprev=nuts.getprev
+local getnext=nuts.getnext
+local getdisc=nuts.getdisc
+local setchar=nuts.setchar
+local setlink=nuts.setlink
+local setprev=nuts.setprev
+local n_ligaturing=node.ligaturing
+local n_kerning=node.kerning
+local ligaturing=nuts.ligaturing
+local kerning=nuts.kerning
+local basemodepass=true
+local function l_warning() texio.write_nl("warning: node.ligaturing called directly") l_warning=nil end
+local function k_warning() texio.write_nl("warning: node.kerning called directly")  k_warning=nil end
+function node.ligaturing(...)
+  if basemodepass and l_warning then
+    l_warning()
+  end
+  return n_ligaturing(...)
+end
+function node.kerning(...)
+  if basemodepass and k_warning then
+    k_warning()
+  end
+  return n_kerning(...)
+end
+function nodes.handlers.setbasemodepass(v)
+  basemodepass=v
+end
+function nodes.handlers.nodepass(head,groupcode,size,packtype,direction)
+  local fontdata=fonts.hashes.identifiers
+  if fontdata then
+    local nuthead=tonut(head)
+    local usedfonts={}
+    local basefonts={}
+    local prevfont=nil
+    local basefont=nil
+    local variants=nil
+    local redundant=nil
+    local nofused=0
+    for n in traverse_id(glyph_code,nuthead) do
+      local font=getfont(n)
+      if font~=prevfont then
+        if basefont then
+          basefont[2]=getprev(n)
+        end
+        prevfont=font
+        local used=usedfonts[font]
+        if not used then
+          local tfmdata=fontdata[font] 
+          if tfmdata then
+            local shared=tfmdata.shared 
+            if shared then
+              local processors=shared.processes
+              if processors and #processors>0 then
+                usedfonts[font]=processors
+                nofused=nofused+1
+              elseif basemodepass then
+                basefont={ n,nil }
+                basefonts[#basefonts+1]=basefont
+              end
+            end
+            local resources=tfmdata.resources
+            variants=resources and resources.variants
+            variants=variants and next(variants) and variants or false
+          end
+        else
+          local tfmdata=fontdata[prevfont]
+          if tfmdata then
+            local resources=tfmdata.resources
+            variants=resources and resources.variants
+            variants=variants and next(variants) and variants or false
+          end
+        end
+      end
+      if variants then
+        local char=getchar(n)
+        if char>=0xFE00 and (char<=0xFE0F or (char>=0xE0100 and char<=0xE01EF)) then
+          local hash=variants[char]
+          if hash then
+            local p=getprev(n)
+            if p and getid(p)==glyph_code then
+              local variant=hash[getchar(p)]
+              if variant then
+                setchar(p,variant)
+              end
+            end
+          end
+          if not redundant then
+            redundant={ n }
+          else
+            redundant[#redundant+1]=n
+          end
+        end
+      end
+    end
+    local nofbasefonts=#basefonts
+    if redundant then
+      for i=1,#redundant do
+        local r=redundant[i]
+        local p,n=getboth(r)
+        if r==nuthead then
+          nuthead=n
+          setprev(n)
+        else
+          setlink(p,n)
+        end
+        if nofbasefonts>0 then
+          for i=1,nofbasefonts do
+            local bi=basefonts[i]
+            if r==bi[1] then
+              bi[1]=n
+            end
+            if r==bi[2] then
+              bi[2]=n
+            end
+          end
+        end
+        flush_node(r)
+      end
+    end
+    for d in traverse_id(disc_code,nuthead) do
+      local _,_,r=getdisc(d)
+      if r then
+        for n in traverse_id(glyph_code,r) do
+          local font=getfont(n)
+          if font~=prevfont then
+            prevfont=font
+            local used=usedfonts[font]
+            if not used then
+              local tfmdata=fontdata[font] 
+              if tfmdata then
+                local shared=tfmdata.shared 
+                if shared then
+                  local processors=shared.processes
+                  if processors and #processors>0 then
+                    usedfonts[font]=processors
+                    nofused=nofused+1
+                  end
+                end
+              end
+            end
+          end
+        end
+      end
+    end
+    if next(usedfonts) then
+      for font,processors in next,usedfonts do
+        for i=1,#processors do
+          head=processors[i](head,font,0,direction,nofused) or head
+        end
+      end
+    end
+    if basemodepass and nofbasefonts>0 then
+      for i=1,nofbasefonts do
+        local range=basefonts[i]
+        local start=range[1]
+        local stop=range[2]
+        if start then
+          local front=nuthead==start
+          local prev,next
+          if stop then
+            next=getnext(stop)
+            start,stop=ligaturing(start,stop)
+            start,stop=kerning(start,stop)
+          else
+            prev=getprev(start)
+            start=ligaturing(start)
+            start=kerning(start)
+          end
+          if prev then
+            setlink(prev,start)
+          end
+          if next then
+            setlink(stop,next)
+          end
+          if front and nuthead~=start then
+            head=tonode(start)
+          end
+        end
+      end
+    end
+    return head,true
+  else
+    return head,false
+  end
+end
+function nodes.handlers.basepass(head)
+  if not basemodepass then
+    head=n_ligaturing(head)
+    head=n_kerning(head)
+  end
+  return head,true
+end
+local nodepass=nodes.handlers.nodepass
+local basepass=nodes.handlers.basepass
+local injectpass=nodes.injections.handler
+local protectpass=nodes.handlers.protectglyphs
+function nodes.simple_font_handler(head,groupcode,size,packtype,direction)
+  if head then
+    head=nodepass(head,groupcode,size,packtype,direction)
+    head=injectpass(head)
+    if not basemodepass then
+      head=basepass(head)
+    end
+    protectpass(head)
+    return head,true
+  else
+    return head,false
+  end
+end
+
+end -- closure
diff --git a/Master/tlpkg/bin/tlpkg-ctan-check b/Master/tlpkg/bin/tlpkg-ctan-check
index ac1508b86d6..04ebbfec887 100755
--- a/Master/tlpkg/bin/tlpkg-ctan-check
+++ b/Master/tlpkg/bin/tlpkg-ctan-check
@@ -270,7 +270,7 @@ my @TLP_working = qw(
     fn2end fnbreak fncychap fncylab fnpara fnpct fnspe fntproof fnumprint
     foekfont foilhtml fonetika
     fontawesome font-change font-change-xetex fontaxes fontbook fontch fontinst
-    fontmfizz fontools
+    fontloader-luaotfload fontmfizz fontools
     fonts-churchslavonic fonts-tlwg fontspec fonttable fontwrap
     footbib footmisc footmisx footnotebackref footnotehyper
     footnoterange footnpag
diff --git a/Master/tlpkg/libexec/ctan2tds b/Master/tlpkg/libexec/ctan2tds
index e7c65e86070..cd007035300 100755
--- a/Master/tlpkg/libexec/ctan2tds
+++ b/Master/tlpkg/libexec/ctan2tds
@@ -1610,6 +1610,7 @@ $standardtex
  'font-change', 'default-amssymbols.tex|font_.*\.tex',
  'fontawesome',	'fontawesomesymbols-.*\.tex|' . $standardtex,
  'fontch',      '\.tex',
+ 'fontloader-luaotfload',    '\.lua$',
  'footnpag',    'footnpag\.sty',
  'fragments',   '\.tex|' . $standardtex,
  'frame',       'frame\.tex|' . $standardtex,
diff --git a/Master/tlpkg/tlpsrc/collection-luatex.tlpsrc b/Master/tlpkg/tlpsrc/collection-luatex.tlpsrc
index 8ed41c46651..8ef0a41a56b 100644
--- a/Master/tlpkg/tlpsrc/collection-luatex.tlpsrc
+++ b/Master/tlpkg/tlpsrc/collection-luatex.tlpsrc
@@ -12,6 +12,7 @@ depend combofont
 depend cstypo
 depend ctablestack
 depend enigma
+depend fontloader-luaotfload
 depend interpreter
 depend lua-check-hyphen
 depend lua-visual-debug
diff --git a/Master/tlpkg/tlpsrc/fontloader-luaotfload.tlpsrc b/Master/tlpkg/tlpsrc/fontloader-luaotfload.tlpsrc
new file mode 100644
index 00000000000..e69de29bb2d
--- /dev/null
+++ b/Master/tlpkg/tlpsrc/fontloader-luaotfload.tlpsrc