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module("luaotfload", package.seeall)
luaotfload.module = {
name = "luaotfload-legacy",
version = 1.31,
date = "2013/04/25",
description = "Unsupported Luaotfload",
author = "Elie Roux & Hans Hagen",
copyright = "Elie Roux",
license = "GPL v2"
}
local error, warning, info, log = luatexbase.provides_module(luaotfload.module)
--[[doc--
This used to be a necessary initalization in order not to rebuild an
existing font. Maybe 600 should be replaced by |\pdfpkresolution|
or |texconfig.pk_dpi| (and it should be replaced dynamically), but
we don't have access (yet) to the |texconfig| table, so we let it be
600. Anyway, it does still work fine even if |\pdfpkresolution| is
changed.
--doc]]--
kpse.init_prog("", 600, "/")
--[[doc--
The minimal required \luatex version.
We are tolerant folks.
--doc]]--
local luatex_version = 60
if tex.luatexversion < luatex_version then
warning("LuaTeX v%.2f is old, v%.2f is required, v0.76 recommended.",
tex.luatexversion/100,
luatex_version /100)
end
--[[doc--
\subsection{Module loading}
We load the outdated \context files with this function. It
automatically adds the |otfl-| prefix to it, so that we call it with
the actual \context name.
--doc]]--
function luaotfload.loadmodule(tofind)
local found = kpse.find_file(tofind,"tex")
if found then
log("loading file %s.", found)
dofile(found)
else
error("file %s not found.", tofind)
end
end
local loadmodule = luaotfload.loadmodule
--[[doc--
Keep away from these lines!
--doc]]--
loadmodule"luaotfload-legacy-merged.lua"
if not fonts then
loadmodule("otfl-luat-dum.lua") -- not used in context at all
loadmodule("otfl-luat-ovr.lua") -- override some luat-dum functions
loadmodule("otfl-data-con.lua") -- maybe some day we don't need this one
loadmodule("otfl-font-ini.lua")
loadmodule("otfl-node-dum.lua")
loadmodule("otfl-node-inj.lua")
--[[doc--
By default \context takes some private attributes for internal use. To
avoide attribute clashes with other packages, we override the function
that allocates new attributes, making it a wraper around
|luatexbase.new_attribute()|. We also prefix attributes with |otfl@| to
avoid possiple name clashes.
--doc]]--
loadmodule("luaotfload-legacy-attributes.lua") -- patch attributes
--[[doc--
Font handling modules.
--doc]]--
loadmodule("otfl-font-tfm.lua")
loadmodule("otfl-font-cid.lua")
loadmodule("otfl-font-ott.lua")
loadmodule("otfl-font-map.lua")
loadmodule("otfl-font-otf.lua")
loadmodule("otfl-font-otd.lua")
loadmodule("otfl-font-oti.lua")
loadmodule("otfl-font-otb.lua")
loadmodule("otfl-font-otn.lua")
loadmodule("otfl-font-ota.lua")
loadmodule("otfl-font-otc.lua")
loadmodule("otfl-font-def.lua")
--[[doc--
\textsf{old luaotfload} specific modules.
--doc]]--
loadmodule("otfl-font-xtx.lua")
loadmodule("otfl-font-dum.lua")
loadmodule("otfl-font-clr.lua")
end
loadmodule"luaotfload-legacy-database.lua" --- unmerged coz needed in db script
--[[doc--
This is a patch for |otfl-font-def.lua|, that defines a reader for ofm
fonts, this is necessary if we set the forced field of the specification
to |ofm|.
--doc]]--
if fonts and fonts.tfm and fonts.tfm.readers then
fonts.tfm.readers.ofm = fonts.tfm.readers.tfm
end
--[[doc--
\subsection{Post-processing TFM table}
Here we do some final touches to the loaded TFM table before passing it
to the \tex end.
First we create a callback for patching fonts on the fly, to be used by
other packages.
--doc]]--
luatexbase.create_callback("luaotfload.patch_font", "simple", function() end)
--[[doc--
then define a function where font manipulation will take place.
--doc]]--
local function def_font(...)
local fontdata = fonts.define.read(...)
if type(fontdata) == "table" and fontdata.shared then
--[[doc--
Then we populate |MathConstants| table, which is required for
OpenType math.
Note: actually it isn’t, but you’re asking for it by using outdated
code.
--doc]]--
local otfdata = fontdata.shared.otfdata
if otfdata.metadata.math then
local mc = { }
for k,v in next, otfdata.metadata.math do
if k:find("Percent") then
-- keep percent values as is
mc[k] = v
else
mc[k] = v / fontdata.units * fontdata.size
end
end
-- for \overwithdelims
mc.FractionDelimiterSize = 1.01 * fontdata.size
mc.FractionDelimiterDisplayStyleSize = 2.39 * fontdata.size
fontdata.MathConstants = mc
end
--[[doc--
Execute any registered font patching callbacks.
--doc]]--
luatexbase.call_callback("luaotfload.patch_font", fontdata)
end
return fontdata
end
--[[doc--
\subsection{\context override}
We have a unified function for both file and name resolver. This
line is commented as it makes database reload too often. This means
that in some cases, a font in the database will not be found if
it's not in the texmf tree. A similar thing will reappear in next
version.
--doc]]--
--fonts.define.resolvers.file = fonts.define.resolvers.name
--[[doc--
Overriding some defaults set in \context code.
--doc]]--
fonts.mode = "node"
--[[doc--
The following features are useful in math (e.g. in XITS Math font),
but \textsf{luaotfload} does not recognize them in |base| mode.
--doc]]--
local register_base_sub = fonts.otf.features.register_base_substitution
local gsubs = {
"ss01", "ss02", "ss03", "ss04", "ss05",
"ss06", "ss07", "ss08", "ss09", "ss10",
"ss11", "ss12", "ss13", "ss14", "ss15",
"ss16", "ss17", "ss18", "ss19", "ss20",
}
for _,v in next, gsubs do
register_base_sub(v)
end
--[[doc--
Finally we register the callbacks
--doc]]--
luatexbase.add_to_callback("pre_linebreak_filter",
nodes.simple_font_handler,
"luaotfload.pre_linebreak_filter")
luatexbase.add_to_callback("hpack_filter",
nodes.simple_font_handler,
"luaotfload.hpack_filter")
luatexbase.reset_callback("define_font")
luatexbase.add_to_callback("define_font",
def_font,
"luaotfload.define_font", 1)
luatexbase.add_to_callback("find_vf_file",
fonts.vf.find,
"luaotfload.find_vf_file")
--[[doc--
XXX: see https://github.com/wspr/unicode-math/issues/185
\luatex does not provide interface to accessing
|(Script)ScriptPercentScaleDown| math constants, so we
emulate \xetex behaviour by setting |\fontdimen10| and
|\fontdimen11|.
Note: actually, it does now, but not unless you update.
--doc]]--
local function set_sscale_diments(fontdata)
local mc = fontdata.MathConstants
if mc then
if mc["ScriptPercentScaleDown"] then
fontdata.parameters[10] = mc.ScriptPercentScaleDown
else -- resort to plain TeX default
fontdata.parameters[10] = 70
end
if mc["ScriptScriptPercentScaleDown"] then
fontdata.parameters[11] = mc.ScriptScriptPercentScaleDown
else -- resort to plain TeX default
fontdata.parameters[11] = 50
end
end
end
luatexbase.add_to_callback("luaotfload.patch_font", set_sscale_diments, "unicodemath.set_sscale_diments")
-- vim:ts=2:sw=2:expandtab:ft=lua
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