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|
% \iffalse meta-comment
%
% Copyright (C) 2008-2009 by Hans Hagen, Taco Hoekwater and Elie Roux
% <elie.roux@telecom-bretagne.eu>. (Support: <lualatex-dev@tug.org>.)
%
% This work is under the CC0 license.
%
% This Current Maintainer of this work is Elie Roux.
%
% This work consists of the main source file luamplib.dtx
% and the derived files
% luamplib.sty, luamplib.lua, luamplib-createmem.lua and luamplib.pdf.
%
%
% Unpacking:
% tex luamplib.dtx
%
% Documentation:
% pdflatex luamplib.dtx
%
% The class ltxdoc loads the configuration file ltxdoc.cfg
% if available. Here you can specify further options, e.g.
% use A4 as paper format:
% \PassOptionsToClass{a4paper}{article}
%
%
%<*ignore>
\begingroup
\def\x{LaTeX2e}%
\expandafter\endgroup
\ifcase 0\ifx\install y1\fi\expandafter
\ifx\csname processbatchFile\endcsname\relax\else1\fi
\ifx\fmtname\x\else 1\fi\relax
\else\csname fi\endcsname
%</ignore>
%<*install>
\input docstrip.tex
\Msg{************************************************************************}
\Msg{* Installation}
\Msg{* Package: luamplib - metapost package for LuaTeX.}
\Msg{************************************************************************}
\keepsilent
\askforoverwritefalse
\let\MetaPrefix\relax
\preamble
This is a generated file.
Copyright (C) 2008-2009 by Hans Hagen, Taco Hoekwater and Elie Roux
<elie.roux@telecom-bretagne.eu>. (Support: <lualatex-dev@tug.org>.)
This work is under the CC0 license.
This Current Maintainer of this work is Elie Roux.
This work consists of the main source file luamplib.dtx
and the derived files
luamplib.sty, luamplib.lua, luamplib-createmem.lua and luamplib.pdf.
\endpreamble
\let\MetaPrefix\DoubleperCent
\generate{%
\usedir{tex/luatex/mplib}%
\file{luamplib.sty}{\from{luamplib.dtx}{package}}%
}
% The following hacks are to generate a lua file with lua comments starting by
% -- instead of %%
\def\MetaPrefix{-- }
\def\luapostamble{%
\MetaPrefix^^J%
\MetaPrefix\space End of File `\outFileName'.%
}
\def\currentpostamble{\luapostamble}%
\generate{%
\usedir{tex/luatex/mplib}%
\file{luamplib.lua}{\from{luamplib.dtx}{lua}}%
\file{luamplib-createmem.lua}{\from{luamplib.dtx}{gen-lua}}%
}
\obeyspaces
\Msg{************************************************************************}
\Msg{*}
\Msg{* To finish the installation you have to move the following}
\Msg{* files into a directory searched by TeX:}
\Msg{*}
\Msg{* luamplib.sty luamplib.lua}
\Msg{*}
\Msg{* Happy TeXing!}
\Msg{*}
\Msg{************************************************************************}
\endbatchfile
%</install>
%<*ignore>
\fi
%</ignore>
%<*driver>
\NeedsTeXFormat{LaTeX2e}
\ProvidesFile{luamplib.drv}%
[2010/10/17 v1.06 mplib package for LuaTeX]%
\documentclass{ltxdoc}
\usepackage{hyperref}
\newcommand*\email[1]{\href{mailto:#1}{#1}}
\begin{document}
\DocInput{luamplib.dtx}%
\end{document}
%</driver>
% \fi
%
% \CheckSum{2}
%
% \CharacterTable
% {Upper-case \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
% Lower-case \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
% Digits \0\1\2\3\4\5\6\7\8\9
% Exclamation \! Double quote \" Hash (number) \#
% Dollar \$ Percent \% Ampersand \&
% Acute accent \' Left paren \( Right paren \)
% Asterisk \* Plus \+ Comma \,
% Minus \- Point \. Solidus \/
% Colon \: Semicolon \; Less than \<
% Equals \= Greater than \> Question mark \?
% Commercial at \@ Left bracket \[ Backslash \\
% Right bracket \] Circumflex \^ Underscore \_
% Grave accent \` Left brace \{ Vertical bar \|
% Right brace \} Tilde \~}
%
% \title{The \textsf{luamplib} package}
% \date{2010/10/17 v1.06}
% \author{Hans Hagen, Taco Hoekwater and Elie Roux \\
% Support: \email{lualatex-dev@tug.org}}
%
% \maketitle
%
% \begin{abstract}
% Package to have metapost code typeset directly in a document with Lua\TeX .
% \end{abstract}
%
% \section{Documentation}
%
% This packages aims at providing a simple way to typeset directly metapost
% code in a document with Lua\TeX . Lua\TeX\ is built with the lua
% \texttt{mplib} library, that runs metapost code. This package is basically a
% wrapper (in Lua) for the Lua \texttt{mplib} functions and some \TeX\
% functions to have the output of the \texttt{mplib} functions in the pdf.
%
% The package need to be in PDF mode in order to output something, as PDF
% specials are not supported by the DVI format and tools.
%
% The metapost figures are put in a \TeX\ \texttt{hbox} with dimensions
% adjusted to the metapost code.
%
% The code is from the \texttt{supp-mpl.lua} and \texttt{supp-mpl.tex} files
% from Con\TeX t, they have been adapted to \LaTeX\ and Plain by Elie Roux.
% The changes are:
%
% \begin{itemize}
% \item a \LaTeX\ environment
% \item all \TeX\ macros start by \texttt{mplib}
% \item use of the luatexbase printing and module functions
% \item adapted warning, error and log messages
% \end{itemize}
%
% Using this package is easy: in Plain, type your metapost code between the
% macros \texttt{mplibcode} and \texttt{endmplibcode}, and in \LaTeX\ in the
% \texttt{mplibcode} environment.
%
% In order to use metapost, some \texttt{.mem} files are needed. These files
% must be generated with the same version of \texttt{mplib} as the version of
% Lua\TeX . These files names can be changed, they are by default
% \texttt{mpost.mem} and \texttt{mpfun.mem}. If this package is
% to be included in a distribution, some values may have to be changed in the
% file \texttt{luamplib.lua}, see comments.
%
% If your distribution does not provide valid \texttt{.mem} files (\TeX Live
% 2009 will be the first), you'll have to generate and install them by hand,
% with the script \texttt{luamplib-createmem.lua} included in this package
% if you want them.
%
% These .mem files are not mandatory though. If this package doesn't find the
% mem files, it will just input the \texttt{.mp} file, and work without problem;
% the only difference is that it may be a bit slower but this is not noticeable
% on a modern computer.
%
% \section{Files}
%
% This package contains three files:
% \begin{itemize}
% \item \texttt{luamplib.lua} containing the lua code that calls mplib
% \item \texttt{luamplib.sty} containing the macros for \LaTeX\ and Plain
% \item \texttt{create-mem.lua}, a standalone mem generation script
% \end{itemize}
%
% \iffalse
%<*lua>
% \fi
%
% \subsection{\texttt{luamplib.lua}}
%
% First the \texttt{luamplib} module is registered as a Lua\TeX\ module,
% with some informations. Here we can't name it \texttt{mplib}, as the name
% is already taken.
%
% \begin{macrocode}
module('luamplib', package.seeall)
luamplib.module = {
name = "luamplib",
version = 1.06,
date = "2010/10/17",
description = "Lua package to typeset Metapost with LuaTeX's MPLib.",
author = "Hans Hagen, Taco Hoekwater & Elie Roux",
copyright = "ConTeXt Development Team & Elie Roux",
license = "CC0",
}
luatexbase.provides_module(luamplib.module)
% \end{macrocode}
% This module is a stripped down version of libraries that are used by
% Con\TeX t.
% \begin{macrocode}
local format, concat, abs = string.format, table.concat, math.abs
% \end{macrocode}
%
% The \texttt{mem} file and the format name are hardcoded, and they can be
% set with \TeX\ if it's useful. The \TeX\ distributions should change
% these values if necessary.
%
% \begin{macrocode}
luamplib.currentformat = "plain"
luamplib.currentmem = "mplib-luatex"
local currentformat = luamplib.currentformat
local currentmem = luamplib.currentmem
function luamplib.setformat (name)
luamplib.currentformat = name
end
function luamplib.setmemfile(name)
luamplib.currentmem = name
end
% \end{macrocode}
%
% We use the \texttt{kpse} library and make it behave like when used
% with Metapost. To find the .mem files with kpse, we have to make a
% small hack... that might be a little bug.
%
% \begin{macrocode}
local mpkpse = kpse.new("luatex","mpost")
function luamplib.finder(name, mode, ftype)
if mode == "w" then
return name
else
local result = mpkpse:find_file(name,ftype)
if not result and ftype == "mem" then
result = mpkpse:find_file("metapost/"..name,ftype)
end
return result
end
end
function luamplib.info (...)
luatexbase.module_info('luamplib', format(...))
end
function luamplib.log (...)
luatexbase.module_log('luamplib', format(...))
end
function luamplib.term (...)
luatexbase.module_term('luamplib', format(...))
end
function luamplib.warning (...)
luatexbase.module_warning('luamplib', format(...))
end
function luamplib.error (...)
luatexbase.module_error('luamplib', format(...))
end
% \end{macrocode}
%
% This is a small hack for \LaTeX . In \LaTeX\ we read the metapost code
% line by line, but it needs to be passed entirely to
% \texttt{luamplib.process}, so we simply add the lines in
% \texttt{luamplib.data} and at the end we call \texttt{luamplib.process}
% on \texttt{luamplib.data}.
%
% \begin{macrocode}
luamplib.data = ""
function luamplib.resetdata()
luamplib.data = ""
end
function luamplib.addline(line)
luamplib.data = luamplib.data .. '\n' .. line
end
function luamplib.processlines()
luamplib.process(luamplib.data)
luamplib.resetdata()
end
% \end{macrocode}
%
%
% \begin{macro}{luamplib.input mp}
%
% This function creates a new mplib object and inputs the
% good .mp file. It's less efficient than loading the .mem
% file, but it works more safely, as the .mp file does not
% depend on the version of the mpost program.
%
% \begin{macrocode}
function luamplib.input_mp(name)
local mpx = mplib.new {
ini_version = true,
find_file = luamplib.finder,
job_name = name,
}
mpx:execute(format("input %s ;",name))
return mpx
end
% \end{macrocode}
%
% \end{macro}
%
% \begin{macro}{luamplib.load}
%
% This function is the one loading the metapost format we want. It uses the
% \texttt{luamplib.currentformat} and \texttt{luamplib.currentmem} to
% determine the format and the mem file to use.
%
% The rest of this module is not documented. More info can be found in the
% Lua\TeX\ manual, articles in user group journals and the files that ship
% with Con\TeX t.
%
% \begin{macrocode}
function luamplib.load()
local mpx = mplib.new {
ini_version = false,
mem_name = currentmem,
find_file = luamplib.finder
}
if mpx then
luamplib.log("using mem file %s", luamplib.finder(currentmem, 'r', 'mem'))
else
mpx = luamplib.input_mp(currentformat)
if mpx then
luamplib.log("using mp file %s", luamplib.finder(currentformat, 'r', 'mp'))
else
luamplib.error("unable to load the metapost format.")
end
end
return mpx
end
% \end{macrocode}
%
% \end{macro}
%
% \begin{macrocode}
function luamplib.report(result)
if not result then
luamplib.error("no result object")
elseif result.status > 0 then
local t, e, l, f = result.term, result.error, result.log
if l then
luamplib.log(l)
end
if t then
luamplib.term(t)
end
if e then
if result.status == 1 then
luamplib.warning(e)
else
luamplib.error(e)
end
end
if not t and not e and not l then
if result.status == 1 then
luamplib.warning("unknown error, no error, terminal or log messages, maybe missing beginfig/endfig")
else
luamplib.error("unknown error, no error, terminal or log messages, maybe missing beginfig/endfig")
end
end
else
return true
end
return false
end
function luamplib.process(data)
local converted, result = false, {}
local mpx = luamplib.load()
if mpx and data then
local result = mpx:execute(data)
if luamplib.report(result) then
if result.fig then
converted = luamplib.convert(result)
else
luamplib.warning("no figure output")
end
end
else
luamplib.error("Mem file unloadable. Maybe generated with a different version of mplib?")
end
return converted, result
end
local function getobjects(result,figure,f)
return figure:objects()
end
function luamplib.convert(result, flusher)
luamplib.flush(result, flusher)
return true -- done
end
local function pdf_startfigure(n,llx,lly,urx,ury)
tex.sprint(format("\\mplibstarttoPDF{%s}{%s}{%s}{%s}",llx,lly,urx,ury))
end
local function pdf_stopfigure()
tex.sprint("\\mplibstoptoPDF")
end
function pdf_literalcode(fmt,...) -- table
tex.sprint(format("\\mplibtoPDF{%s}",format(fmt,...)))
end
function pdf_textfigure(font,size,text,width,height,depth)
text = text:gsub(".","\\hbox{%1}") -- kerning happens in metapost
tex.sprint(format("\\mplibtextext{%s}{%s}{%s}{%s}{%s}",font,size,text,0,-( 7200/ 7227)/65536*depth))
end
local bend_tolerance = 131/65536
local rx, sx, sy, ry, tx, ty, divider = 1, 0, 0, 1, 0, 0, 1
local function pen_characteristics(object)
if mplib.pen_info then
local t = mplib.pen_info(object)
rx, ry, sx, sy, tx, ty = t.rx, t.ry, t.sx, t.sy, t.tx, t.ty
divider = sx*sy - rx*ry
return not (sx==1 and rx==0 and ry==0 and sy==1 and tx==0 and ty==0), t.width
else
rx, sx, sy, ry, tx, ty, divider = 1, 0, 0, 1, 0, 0, 1
return false, 1
end
end
local function concat(px, py) -- no tx, ty here
return (sy*px-ry*py)/divider,(sx*py-rx*px)/divider
end
local function curved(ith,pth)
local d = pth.left_x - ith.right_x
if abs(ith.right_x - ith.x_coord - d) <= bend_tolerance and abs(pth.x_coord - pth.left_x - d) <= bend_tolerance then
d = pth.left_y - ith.right_y
if abs(ith.right_y - ith.y_coord - d) <= bend_tolerance and abs(pth.y_coord - pth.left_y - d) <= bend_tolerance then
return false
end
end
return true
end
local function flushnormalpath(path,open)
local pth, ith
for i=1,#path do
pth = path[i]
if not ith then
pdf_literalcode("%f %f m",pth.x_coord,pth.y_coord)
elseif curved(ith,pth) then
pdf_literalcode("%f %f %f %f %f %f c",ith.right_x,ith.right_y,pth.left_x,pth.left_y,pth.x_coord,pth.y_coord)
else
pdf_literalcode("%f %f l",pth.x_coord,pth.y_coord)
end
ith = pth
end
if not open then
local one = path[1]
if curved(pth,one) then
pdf_literalcode("%f %f %f %f %f %f c",pth.right_x,pth.right_y,one.left_x,one.left_y,one.x_coord,one.y_coord )
else
pdf_literalcode("%f %f l",one.x_coord,one.y_coord)
end
elseif #path == 1 then
-- special case .. draw point
local one = path[1]
pdf_literalcode("%f %f l",one.x_coord,one.y_coord)
end
return t
end
local function flushconcatpath(path,open)
pdf_literalcode("%f %f %f %f %f %f cm", sx, rx, ry, sy, tx ,ty)
local pth, ith
for i=1,#path do
pth = path[i]
if not ith then
pdf_literalcode("%f %f m",concat(pth.x_coord,pth.y_coord))
elseif curved(ith,pth) then
local a, b = concat(ith.right_x,ith.right_y)
local c, d = concat(pth.left_x,pth.left_y)
pdf_literalcode("%f %f %f %f %f %f c",a,b,c,d,concat(pth.x_coord, pth.y_coord))
else
pdf_literalcode("%f %f l",concat(pth.x_coord, pth.y_coord))
end
ith = pth
end
if not open then
local one = path[1]
if curved(pth,one) then
local a, b = concat(pth.right_x,pth.right_y)
local c, d = concat(one.left_x,one.left_y)
pdf_literalcode("%f %f %f %f %f %f c",a,b,c,d,concat(one.x_coord, one.y_coord))
else
pdf_literalcode("%f %f l",concat(one.x_coord,one.y_coord))
end
elseif #path == 1 then
-- special case .. draw point
local one = path[1]
pdf_literalcode("%f %f l",concat(one.x_coord,one.y_coord))
end
return t
end
% \end{macrocode}
%
% Support for specials in DVI has been removed.
%
% \begin{macrocode}
function luamplib.flush(result,flusher)
if result then
local figures = result.fig
if figures then
for f=1, #figures do
luamplib.log("flushing figure %s",f)
local figure = figures[f]
local objects = getobjects(result,figure,f)
local fignum = tonumber((figure:filename()):match("([%d]+)$") or figure:charcode() or 0)
local miterlimit, linecap, linejoin, dashed = -1, -1, -1, false
local bbox = figure:boundingbox()
local llx, lly, urx, ury = bbox[1], bbox[2], bbox[3], bbox[4] -- faster than unpack
if urx < llx then
-- invalid
pdf_startfigure(fignum,0,0,0,0)
pdf_stopfigure()
else
pdf_startfigure(fignum,llx,lly,urx,ury)
pdf_literalcode("q")
if objects then
for o=1,#objects do
local object = objects[o]
local objecttype = object.type
if objecttype == "start_bounds" or objecttype == "stop_bounds" then
-- skip
elseif objecttype == "start_clip" then
pdf_literalcode("q")
flushnormalpath(object.path,t,false)
pdf_literalcode("W n")
elseif objecttype == "stop_clip" then
pdf_literalcode("Q")
miterlimit, linecap, linejoin, dashed = -1, -1, -1, false
elseif objecttype == "special" then
-- not supported
elseif objecttype == "text" then
local ot = object.transform -- 3,4,5,6,1,2
pdf_literalcode("q %f %f %f %f %f %f cm",ot[3],ot[4],ot[5],ot[6],ot[1],ot[2])
pdf_textfigure(object.font,object.dsize,object.text,object.width,object.height,object.depth)
pdf_literalcode("Q")
else
local cs = object.color
if cs and #cs > 0 then
pdf_literalcode(luamplib.colorconverter(cs))
end
local ml = object.miterlimit
if ml and ml ~= miterlimit then
miterlimit = ml
pdf_literalcode("%f M",ml)
end
local lj = object.linejoin
if lj and lj ~= linejoin then
linejoin = lj
pdf_literalcode("%i j",lj)
end
local lc = object.linecap
if lc and lc ~= linecap then
linecap = lc
pdf_literalcode("%i J",lc)
end
local dl = object.dash
if dl then
local d = format("[%s] %i d",concat(dl.dashes or {}," "),dl.offset)
if d ~= dashed then
dashed = d
pdf_literalcode(dashed)
end
elseif dashed then
pdf_literalcode("[] 0 d")
dashed = false
end
local path = object.path
local transformed, penwidth = false, 1
local open = path and path[1].left_type and path[#path].right_type
local pen = object.pen
if pen then
if pen.type == 'elliptical' then
transformed, penwidth = pen_characteristics(object) -- boolean, value
pdf_literalcode("%f w",penwidth)
if objecttype == 'fill' then
objecttype = 'both'
end
else -- calculated by mplib itself
objecttype = 'fill'
end
end
if transformed then
pdf_literalcode("q")
end
if path then
if transformed then
flushconcatpath(path,open)
else
flushnormalpath(path,open)
end
if objecttype == "fill" then
pdf_literalcode("h f")
elseif objecttype == "outline" then
pdf_literalcode((open and "S") or "h S")
elseif objecttype == "both" then
pdf_literalcode("h B")
end
end
if transformed then
pdf_literalcode("Q")
end
local path = object.htap
if path then
if transformed then
pdf_literalcode("q")
end
if transformed then
flushconcatpath(path,open)
else
flushnormalpath(path,open)
end
if objecttype == "fill" then
pdf_literalcode("h f")
elseif objecttype == "outline" then
pdf_literalcode((open and "S") or "h S")
elseif objecttype == "both" then
pdf_literalcode("h B")
end
if transformed then
pdf_literalcode("Q")
end
end
if cr then
pdf_literalcode(cr)
end
end
end
end
pdf_literalcode("Q")
pdf_stopfigure()
end
end
end
end
end
function luamplib.colorconverter(cr)
local n = #cr
if n == 4 then
local c, m, y, k = cr[1], cr[2], cr[3], cr[4]
return format("%.3f %.3f %.3f %.3f k %.3f %.3f %.3f %.3f K",c,m,y,k,c,m,y,k), "0 g 0 G"
elseif n == 3 then
local r, g, b = cr[1], cr[2], cr[3]
return format("%.3f %.3f %.3f rg %.3f %.3f %.3f RG",r,g,b,r,g,b), "0 g 0 G"
else
local s = cr[1]
return format("%.3f g %.3f G",s,s), "0 g 0 G"
end
end
% \end{macrocode}
%
% \iffalse
%</lua>
% \fi
%
% \subsection{\texttt{luamplib.sty}}
%
% \iffalse
%<*package>
% \fi
%
%
% First we need to load fancyvrb, to define the environment mplibcode.
%
% \begin{macrocode}
\bgroup\expandafter\expandafter\expandafter\egroup
\expandafter\ifx\csname ProvidesPackage\endcsname\relax
\input luatexbase-modutils.sty
\else
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{luamplib}
[2010/10/17 v1.06 mplib package for LuaTeX]
\RequirePackage{luatexbase-modutils}
\RequirePackage{fancyvrb}
\fi
% \end{macrocode}
% Loading of lua code.
% \begin{macrocode}
\RequireLuaModule{luamplib}
% \end{macrocode}
%
%
%
% There are (basically) two formats for metapost: \emph{plain} and
% \emph{mpfun}. The corresponding \texttt{.mem} files are
% \texttt{mplib-luatex.mem} in \TeX Live 2010.
% With these functions you can set the format and the mem files that will
% be used by this package. Warning: the package never generates the mem
% files, you have to do it by hand, with \texttt{create-mem.lua}.
%
% \begin{macrocode}
\def\mplibsetformat#1{\directlua{luamplib.setformat([[#1]])}}
\def\mplibsetmemfile#1{\directlua{luamplib.setmemfile([[#1]])}}
% \end{macrocode}
%
%
% MPLib only works in PDF mode, we don't do anything if we are in DVI mode,
% and we output a warning.
%
% \begin{macrocode}
\ifnum\pdfoutput>0
\let\mplibtoPDF\pdfliteral
\else
%\def\MPLIBtoPDF#1{\special{pdf:literal direct #1}} % not ok yet
\def\mplibtoPDF#1{}
\expandafter\ifx\csname PackageWarning\endcsname\relax
\write16{}
\write16{Warning: MPLib only works in PDF mode, no figure will be output.}
\write16{}
\else
\PackageWarning{mplib}{MPLib only works in PDF mode, no figure will be output.}
\fi
\fi
% \end{macrocode}
%
% The Plain-specific stuff.
%
% \begin{macrocode}
\bgroup\expandafter\expandafter\expandafter\egroup
\expandafter\ifx\csname ProvidesPackage\endcsname\relax
\def\mplibsetupcatcodes{
\catcode`\{=12 \catcode`\}=12 \catcode`\#=12 \catcode`\^=12 \catcode`\~=12
\catcode`\_=12 \catcode`\%=12 \catcode`\&=12 \catcode`\$=12
}
\def\mplibcode{%
\bgroup %
\mplibsetupcatcodes %
\mplibdocode %
}
\long\def\mplibdocode#1\endmplibcode{%
\egroup %
\mplibprocess{#1}%
}
\long\def\mplibprocess#1{%
\directlua{luamplib.process([[#1]])}%
}
\else
% \end{macrocode}
% The \LaTeX-specific parts. First a Hack for the catcodes in \LaTeX .
% \begin{macrocode}
\makeatletter
\begingroup
\catcode`\,=13
\catcode`\-=13
\gdef\FV@hack{%
\def,{\string,}%
\def-{\string-}%
}
\endgroup
% \end{macrocode}
% In \LaTeX\ (it's not the case in plain\TeX ), we get the metapost code
% line by line, here is the function handling a line.
% \begin{macrocode}
\newcommand\mplibaddlines[1]{%
\begingroup %
\FV@hack %
\def\FV@ProcessLine##1{%
\directlua{luamplib.addline([[##1]])}%
}%
\csname FV@SV@#1\endcsname %
\endgroup %
}
\makeatother
% \end{macrocode}
% The \LaTeX\ environment is a modified \texttt{verbatim} environment.
% \begin{macrocode}
\newenvironment{mplibcode}{%
\VerbatimEnvironment %
\begin{SaveVerbatim}{memoire}%
}{%
\end{SaveVerbatim}%
\mplibaddlines{memoire}%
\directlua{luamplib.processlines()}%
}
\fi
% \end{macrocode}
% We use a dedicated scratchbox.
% \begin{macrocode}
\ifx\mplibscratchbox\undefined \newbox\mplibscratchbox \fi
% \end{macrocode}
% We encapsulate the litterals.
% \begin{macrocode}
\def\mplibstarttoPDF#1#2#3#4{
\hbox\bgroup
\xdef\MPllx{#1}\xdef\MPlly{#2}%
\xdef\MPurx{#3}\xdef\MPury{#4}%
\xdef\MPwidth{\the\dimexpr#3bp-#1bp\relax}%
\xdef\MPheight{\the\dimexpr#4bp-#2bp\relax}%
\parskip0pt%
\leftskip0pt%
\parindent0pt%
\everypar{}%
\setbox\mplibscratchbox\vbox\bgroup
\noindent
}
\def\mplibstoptoPDF{%
\egroup %
\setbox\mplibscratchbox\hbox %
{\hskip-\MPllx bp%
\raise-\MPlly bp%
\box\mplibscratchbox}%
\setbox\mplibscratchbox\vbox to \MPheight
{\vfill
\hsize\MPwidth
\wd\mplibscratchbox0pt%
\ht\mplibscratchbox0pt%
\dp\mplibscratchbox0pt%
\box\mplibscratchbox}%
\wd\mplibscratchbox\MPwidth
\ht\mplibscratchbox\MPheight
\box\mplibscratchbox
\egroup
}
% \end{macrocode}
% Text items have a special handler.
% \begin{macrocode}
\def\mplibtextext#1#2#3#4#5{%
\begingroup
\setbox\mplibscratchbox\hbox
{\font\temp=#1 at #2bp%
\temp
#3}%
\setbox\mplibscratchbox\hbox
{\hskip#4 bp%
\raise#5 bp%
\box\mplibscratchbox}%
\wd\mplibscratchbox0pt%
\ht\mplibscratchbox0pt%
\dp\mplibscratchbox0pt%
\box\mplibscratchbox
\endgroup
}
% \end{macrocode}
%
% \iffalse
%</package>
% \fi
%
% \iffalse
%<*gen-lua>
% \fi
%
% \subsection{\texttt{luamplib-createmem.lua}}
%
% Finally a small standalone file to call with \texttt{texlua} that
% generates \texttt{mplib-luatex.mem} in the current directory. To generate
% other formats in other names, simply change the last line. After the
% \texttt{mem} generation, you'll have to install it in a directory
% searchable by \TeX .
%
% \begin{macrocode}
kpse.set_program_name("kpsewhich")
function finder (name, mode, ftype)
if mode == "w" then
return name
else
local result = kpse.find_file(name,ftype)
return result
end
end
local preamble = [[
input %s ; dump ;
]]
% \end{macrocode}
%
% \begin{macro}{makeformat}
% \begin{macrocode}
makeformat = function (name, mem_name)
local mpx = mplib.new {
ini_version = true,
find_file = finder,
job_name = mem_name,
}
if mpx then
local result
result = mpx:execute(string.format(preamble,name))
print(string.format("dumping format %s in %s", name, mem_name))
mpx:finish()
end
end
makeformat("plain", "mplib-luatex.mem")
% \end{macrocode}
% \end{macro}
% \iffalse
%</gen-lua>
% \fi
% \Finale
\endinput
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