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|
--
-- This is file `luamplib.lua',
-- generated with the docstrip utility.
--
-- The original source files were:
--
-- luamplib.dtx (with options: `lua')
--
-- See source file 'luamplib.dtx' for licencing and contact information.
--
luamplib = luamplib or { }
local luamplib = luamplib
luamplib.showlog = luamplib.showlog or false
luamplib.lastlog = ""
local err, warn, info, log = luatexbase.provides_module({
name = "luamplib",
version = "2.7.0",
date = "2014/04/25",
description = "Lua package to typeset Metapost with LuaTeX's MPLib.",
})
local format, abs = string.format, math.abs
local stringgsub = string.gsub
local stringfind = string.find
local stringmatch = string.match
local stringgmatch = string.gmatch
local stringexplode = string.explode
local tableconcat = table.concat
local texsprint = tex.sprint
local mplib = require ('mplib')
local kpse = require ('kpse')
local lfs = require ('lfs')
local lfsattributes = lfs.attributes
local lfsisdir = lfs.isdir
local lfsmkdir = lfs.mkdir
local lfstouch = lfs.touch
local ioopen = io.open
local file = file
if not file then
file = { }
function file.replacesuffix(filename, suffix)
return (stringgsub(filename,"%.[%a%d]+$","")) .. "." .. suffix
end
function file.stripsuffix(filename)
return (stringgsub(filename,"%.[%a%d]+$",""))
end
end
local is_writable = file.is_writable or function(name)
if lfsisdir(name) then
name = name .. "/_luam_plib_temp_file_"
local fh = ioopen(name,"w")
if fh then
fh:close(); os.remove(name)
return true
end
end
end
local mk_full_path = lfs.mkdirs or function(path)
local full = ""
for sub in stringgmatch(path,"(/*[^\\/]+)") do
full = full .. sub
lfsmkdir(full)
end
end
local luamplibtime = kpse.find_file("luamplib.lua")
luamplibtime = luamplibtime and lfsattributes(luamplibtime,"modification")
local currenttime = os.time()
local outputdir
if lfstouch then
local texmfvar = kpse.expand_var('$TEXMFVAR')
if texmfvar and texmfvar ~= "" and texmfvar ~= '$TEXMFVAR' then
for _,dir in next,stringexplode(texmfvar,os.type == "windows" and ";" or ":") do
if not lfsisdir(dir) then
mk_full_path(dir)
end
if is_writable(dir) then
local cached = format("%s/luamplib_cache",dir)
lfsmkdir(cached)
outputdir = cached
break
end
end
end
end
if not outputdir then
outputdir = "."
for _,v in ipairs(arg) do
local t = stringmatch(v,"%-output%-directory=(.+)")
if t then
outputdir = t
break
end
end
end
function luamplib.getcachedir(dir)
dir = stringgsub(dir,"##","#")
dir = stringgsub(dir,"^~",
os.type == "windows" and os.getenv("UserProfile") or os.getenv("HOME"))
if lfstouch and dir then
if lfsisdir(dir) then
if is_writable(dir) then
luamplib.cachedir = dir
else
warn("Directory '"..dir.."' is not writable!")
end
else
warn("Directory '"..dir.."' does not exist!")
end
end
end
local noneedtoreplace = {
["boxes.mp"] = true,
-- ["format.mp"] = true,
["graph.mp"] = true,
["marith.mp"] = true,
["mfplain.mp"] = true,
["mpost.mp"] = true,
["plain.mp"] = true,
["rboxes.mp"] = true,
["sarith.mp"] = true,
["string.mp"] = true,
["TEX.mp"] = true,
["metafun.mp"] = true,
["metafun.mpiv"] = true,
["mp-abck.mpiv"] = true,
["mp-apos.mpiv"] = true,
["mp-asnc.mpiv"] = true,
["mp-base.mpiv"] = true,
["mp-butt.mpiv"] = true,
["mp-char.mpiv"] = true,
["mp-chem.mpiv"] = true,
["mp-core.mpiv"] = true,
["mp-crop.mpiv"] = true,
["mp-figs.mpiv"] = true,
["mp-form.mpiv"] = true,
["mp-func.mpiv"] = true,
["mp-grap.mpiv"] = true,
["mp-grid.mpiv"] = true,
["mp-grph.mpiv"] = true,
["mp-idea.mpiv"] = true,
["mp-mlib.mpiv"] = true,
["mp-page.mpiv"] = true,
["mp-shap.mpiv"] = true,
["mp-step.mpiv"] = true,
["mp-text.mpiv"] = true,
["mp-tool.mpiv"] = true,
}
luamplib.noneedtoreplace = noneedtoreplace
local function replaceformatmp(file,newfile,ofmodify)
local fh = ioopen(file,"r")
if not fh then return file end
local data = fh:read("*all"); fh:close()
fh = ioopen(newfile,"w")
if not fh then return file end
fh:write(
"let normalinfont = infont;\n",
"primarydef str infont name = rawtextext(str) enddef;\n",
data,
"vardef Fmant_(expr x) = rawtextext(decimal abs x) enddef;\n",
"vardef Fexp_(expr x) = rawtextext(\"$^{\"&decimal x&\"}$\") enddef;\n",
"let infont = normalinfont;\n"
); fh:close()
lfstouch(newfile,currenttime,ofmodify)
return newfile
end
local function replaceinputmpfile (name,file)
local ofmodify = lfsattributes(file,"modification")
if not ofmodify then return file end
local cachedir = luamplib.cachedir or outputdir
local newfile = stringgsub(name,"%W","_")
newfile = cachedir .."/luamplib_input_"..newfile
if newfile and luamplibtime then
local nf = lfsattributes(newfile)
if nf and nf.mode == "file" and ofmodify == nf.modification and luamplibtime < nf.access then
return nf.size == 0 and file or newfile
end
end
if name == "format.mp" then return replaceformatmp(file,newfile,ofmodify) end
local fh = ioopen(file,"r")
if not fh then return file end
local data = fh:read("*all"); fh:close()
data = stringgsub(data, "\"[^\n]-\"",
function(str)
str = stringgsub(str,"%%","!!!!!PERCENT!!!!!")
str = stringgsub(str,"([bem])tex%f[^A-Z_a-z]","%1!!!T!!!E!!!X!!!")
return str
end)
data = stringgsub(data,"%%.-\n","")
local count,cnt = 0,0
data,cnt = stringgsub(data,
"%f[A-Z_a-z]btex%f[^A-Z_a-z]%s*(.-)%s*%f[A-Z_a-z]etex%f[^A-Z_a-z]",
function(str)
str = stringgsub(str,"[\n\r]%s*"," ")
str = stringgsub(str,'"','"&ditto&"')
return format("rawtextext(\"%s\")",str)
end)
count = count + cnt
data,cnt = stringgsub(data,
"%f[A-Z_a-z]verbatimtex%f[^A-Z_a-z]%s*.-%s*%f[A-Z_a-z]etex%f[^A-Z_a-z]",
"")
count = count + cnt
if count == 0 then
noneedtoreplace[name] = true
fh = ioopen(newfile,"w");
if fh then
fh:close()
lfstouch(newfile,currenttime,ofmodify)
end
return file
end
data = stringgsub(data,"([bem])!!!T!!!E!!!X!!!","%1tex")
data = stringgsub(data,"!!!!!PERCENT!!!!!","%%")
fh = ioopen(newfile,"w")
if not fh then return file end
fh:write(data); fh:close()
lfstouch(newfile,currenttime,ofmodify)
return newfile
end
local randomseed = nil
local mpkpse = kpse.new("luatex", "mpost")
local function finder(name, mode, ftype)
if mode == "w" then
return name
else
local file = mpkpse:find_file(name,ftype)
if file then
if not lfstouch or ftype ~= "mp" or noneedtoreplace[name] then
return file
end
return replaceinputmpfile(name,file)
end
return mpkpse:find_file(name,stringmatch(name,"[a-zA-Z]+$"))
end
end
luamplib.finder = finder
function luamplib.resetlastlog()
luamplib.lastlog = ""
end
local mplibone = tonumber(mplib.version()) <= 1.50
if mplibone then
luamplib.make = luamplib.make or function(name,mem_name,dump)
local t = os.clock()
local mpx = mplib.new {
ini_version = true,
find_file = luamplib.finder,
job_name = file.stripsuffix(name)
}
mpx:execute(format("input %s ;",name))
if dump then
mpx:execute("dump ;")
info("format %s made and dumped for %s in %0.3f seconds",mem_name,name,os.clock()-t)
else
info("%s read in %0.3f seconds",name,os.clock()-t)
end
return mpx
end
function luamplib.load(name)
local mem_name = file.replacesuffix(name,"mem")
local mpx = mplib.new {
ini_version = false,
mem_name = mem_name,
find_file = luamplib.finder
}
if not mpx and type(luamplib.make) == "function" then
-- when i have time i'll locate the format and dump
mpx = luamplib.make(name,mem_name)
end
if mpx then
info("using format %s",mem_name,false)
return mpx, nil
else
return nil, { status = 99, error = "out of memory or invalid format" }
end
end
else
local preamble = [[
boolean mplib ; mplib := true ;
let dump = endinput ;
let normalfontsize = fontsize;
input %s ;
]]
luamplib.make = luamplib.make or function()
end
function luamplib.load(name)
local mpx = mplib.new {
ini_version = true,
find_file = luamplib.finder,
math_mode = luamplib.numbersystem,
random_seed = randomseed,
}
local result
if not mpx then
result = { status = 99, error = "out of memory"}
else
result = mpx:execute(format(preamble, file.replacesuffix(name,"mp")))
end
luamplib.reporterror(result)
return mpx, result
end
end
local currentformat = "plain"
local function setformat (name) --- used in .sty
currentformat = name
end
luamplib.setformat = setformat
luamplib.reporterror = function (result)
if not result then
err("no result object returned")
else
local t, e, l = result.term, result.error, result.log
local log = stringgsub(t or l or "no-term","^%s+","\n")
luamplib.lastlog = luamplib.lastlog .. "\n " .. (l or t or "no-log")
if result.status > 0 then
warn("%s",log)
if result.status > 1 then
err("%s",e or "see above messages")
end
end
return log
end
end
local function process_indeed (mpx, data, indeed)
local converted, result = false, {}
local mpx = luamplib.load(mpx)
if mpx and data then
result = mpx:execute(data)
local log = luamplib.reporterror(result)
if indeed and log then
if luamplib.showlog then
info("%s",luamplib.lastlog)
luamplib.resetlastlog()
elseif result.fig then
if stringfind(log,"\n>>") then info("%s",log) end
converted = luamplib.convert(result)
else
info("%s",log)
warn("No figure output. Maybe no beginfig/endfig")
end
end
else
err("Mem file unloadable. Maybe generated with a different version of mplib?")
end
return converted, result
end
local process = function (data,indeed)
if not indeed then
randomseed = math.random(65535)
end
return process_indeed(currentformat, data, indeed)
end
luamplib.process = process
local function getobjects(result,figure,f)
return figure:objects()
end
local function convert(result, flusher)
luamplib.flush(result, flusher)
return true -- done
end
luamplib.convert = convert
local function pdf_startfigure(n,llx,lly,urx,ury)
texsprint(format("\\mplibstarttoPDF{%f}{%f}{%f}{%f}",llx,lly,urx,ury))
end
local function pdf_stopfigure()
texsprint("\\mplibstoptoPDF")
end
local function pdf_literalcode(fmt,...) -- table
texsprint(format("\\mplibtoPDF{%s}",format(fmt,...)))
end
luamplib.pdf_literalcode = pdf_literalcode
local function pdf_textfigure(font,size,text,width,height,depth)
-- if text == "" then text = "\0" end -- char(0) has gone
text = text:gsub(".",function(c)
return format("\\hbox{\\char%i}",string.byte(c)) -- kerning happens in metapost
end)
texsprint(format("\\mplibtextext{%s}{%f}{%s}{%s}{%f}",font,size,text,0,-( 7200/ 7227)/65536*depth))
end
luamplib.pdf_textfigure = pdf_textfigure
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)
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
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
local further_split_keys = {
["MPlibTEXboxID"] = true,
["sh_color_a"] = true,
["sh_color_b"] = true,
}
local function script2table(s)
local t = {}
for _,i in ipairs(stringexplode(s,"\13+")) do
local k,v = stringmatch(i,"(.-)=(.*)") -- v may contain = or empty.
if k and v and k ~= "" then
if further_split_keys[k] then
t[k] = stringexplode(v,":")
else
t[k] = v
end
end
end
return t
end
local mplibcodepreamble = [[
vardef rawtextext (expr t) =
if unknown TEXBOX_:
image( special "MPlibmkTEXbox="&t;
addto currentpicture doublepath unitsquare; )
else:
TEXBOX_ := TEXBOX_ + 1;
if known TEXBOX_wd_[TEXBOX_]:
image ( addto currentpicture doublepath unitsquare
xscaled TEXBOX_wd_[TEXBOX_]
yscaled (TEXBOX_ht_[TEXBOX_] + TEXBOX_dp_[TEXBOX_])
shifted (0, -TEXBOX_dp_[TEXBOX_])
withprescript "MPlibTEXboxID=" &
decimal TEXBOX_ & ":" &
decimal TEXBOX_wd_[TEXBOX_] & ":" &
decimal(TEXBOX_ht_[TEXBOX_]+TEXBOX_dp_[TEXBOX_]); )
else:
image( special "MPlibTEXError=1"; )
fi
fi
enddef;
if known context_mlib:
defaultfont := "cmtt10";
let infont = normalinfont;
let fontsize = normalfontsize;
vardef thelabel@#(expr p,z) =
if string p :
thelabel@#(p infont defaultfont scaled defaultscale,z)
else :
p shifted (z + labeloffset*mfun_laboff@# -
(mfun_labxf@#*lrcorner p + mfun_labyf@#*ulcorner p +
(1-mfun_labxf@#-mfun_labyf@#)*llcorner p))
fi
enddef;
def graphictext primary filename =
if (readfrom filename = EOF):
errmessage "Please prepare '"&filename&"' in advance with"&
" 'pstoedit -ssp -dt -f mpost yourfile.ps "&filename&"'";
fi
closefrom filename;
def data_mpy_file = filename enddef;
mfun_do_graphic_text (filename)
enddef;
if unknown TEXBOX_: def mfun_do_graphic_text text t = enddef; fi
else:
vardef textext@# (text t) = rawtextext (t) enddef;
fi
def externalfigure primary filename =
draw rawtextext("\includegraphics{"& filename &"}")
enddef;
def TEX = textext enddef;
def fontmapfile primary filename = enddef;
def specialVerbatimTeX (text t) = special "MPlibVerbTeX="&t; enddef;
def ignoreVerbatimTeX (text t) = enddef;
let VerbatimTeX = specialVerbatimTeX;
extra_beginfig := extra_beginfig & " let VerbatimTeX = ignoreVerbatimTeX;" ;
extra_endfig := extra_endfig & " let VerbatimTeX = specialVerbatimTeX;" ;
]]
local textextlabelpreamble = [[
primarydef s infont f = rawtextext(s) enddef;
def fontsize expr f =
begingroup
save size,pic; numeric size; picture pic;
pic := rawtextext("\hskip\pdffontsize\font");
size := xpart urcorner pic - xpart llcorner pic;
if size = 0: 10pt else: size fi
endgroup
enddef;
]]
local function protecttextext(data)
local everymplib = tex.toks['everymplibtoks'] or ''
local everyendmplib = tex.toks['everyendmplibtoks'] or ''
data = "\n" .. everymplib .."\n".. data .."\n".. everyendmplib
data = stringgsub(data,"\r","\n")
data = stringgsub(data, "\"[^\n]-\"",
function(str)
str = stringgsub(str,"%%","!!!!!PERCENT!!!!!")
str = stringgsub(str,"([bem])tex%f[^A-Z_a-z]","%1!!!T!!!E!!!X!!!")
return str
end)
data = stringgsub(data,"%%.-\n","")
data = stringgsub(data,
"%f[A-Z_a-z]btex%f[^A-Z_a-z]%s*(.-)%s*%f[A-Z_a-z]etex%f[^A-Z_a-z]",
function(str)
str = stringgsub(str,'"','"&ditto&"')
str = stringgsub(str,"\n%s*"," ")
return format("rawtextext(\"%s\")",str)
end)
data = stringgsub(data,
"%f[A-Z_a-z]verbatimtex%f[^A-Z_a-z]%s*(.-)%s*%f[A-Z_a-z]etex%f[^A-Z_a-z]",
function(str)
str = stringgsub(str,'"','"&ditto&"')
str = stringgsub(str,"\n%s*"," ")
return format("VerbatimTeX(\"%s\")",str)
end)
data = stringgsub(data, "\"[^\n]-\"",
function(str)
str = stringgsub(str,"([bem])!!!T!!!E!!!X!!!","%1tex")
str = stringgsub(str,"{", "!!!!!LEFTBRCE!!!!!")
str = stringgsub(str,"}", "!!!!!RGHTBRCE!!!!!")
str = stringgsub(str,"#", "!!!!!SHARPE!!!!!")
return format("\\detokenize{%s}",str)
end)
texsprint(data)
end
luamplib.protecttextext = protecttextext
local TeX_code_t = {}
local function domakeTEXboxes (data)
local num = 255 -- output box
if data and data.fig then
local figures = data.fig
for f=1, #figures do
TeX_code_t[f] = nil
local figure = figures[f]
local objects = getobjects(data,figure,f)
if objects then
for o=1,#objects do
local object = objects[o]
local prescript = object.prescript
prescript = prescript and script2table(prescript)
local str = prescript and prescript.MPlibmkTEXbox
if str then
num = num + 1
texsprint(format("\\setbox%i\\hbox{%s}",num,str))
end
local texcode = prescript and prescript.MPlibVerbTeX
if texcode and texcode ~= "" then
TeX_code_t[f] = texcode
end
end
end
end
end
end
local function makeTEXboxes (data)
data = stringgsub(data, "##", "#") -- restore # doubled in input string
data = stringgsub(data, "!!!!!PERCENT!!!!!", "%%")
data = stringgsub(data, "!!!!!LEFTBRCE!!!!!","{")
data = stringgsub(data, "!!!!!RGHTBRCE!!!!!","}")
data = stringgsub(data, "!!!!!SHARPE!!!!!", "#" )
local preamble = mplibcodepreamble
if luamplib.textextlabel then
preamble = preamble .. textextlabelpreamble
end
local _,result = process(preamble .. data, false)
domakeTEXboxes(result)
return data
end
luamplib.makeTEXboxes = makeTEXboxes
local factor = 65536*(7227/7200)
local function processwithTEXboxes (data)
if not data then return end
local num = 255 -- output box
local prepreamble = format("TEXBOX_:=%i;\n",num)
while true do
num = num + 1
local box = tex.box[num]
if not box then break end
prepreamble = format(
"%sTEXBOX_wd_[%i]:=%f;\nTEXBOX_ht_[%i]:=%f;\nTEXBOX_dp_[%i]:=%f;\n",
prepreamble,
num, box.width /factor,
num, box.height/factor,
num, box.depth /factor)
end
local preamble = prepreamble .. mplibcodepreamble
if luamplib.textextlabel then
preamble = preamble .. textextlabelpreamble
end
process(preamble .. data, true)
end
luamplib.processwithTEXboxes = processwithTEXboxes
local pdfmode = tex.pdfoutput > 0 and true or false
local function start_pdf_code()
if pdfmode then
pdf_literalcode("q")
else
texsprint("\\special{pdf:bcontent}") -- dvipdfmx
end
end
local function stop_pdf_code()
if pdfmode then
pdf_literalcode("Q")
else
texsprint("\\special{pdf:econtent}") -- dvipdfmx
end
end
local function putTEXboxes (object,prescript)
local box = prescript.MPlibTEXboxID
local n,tw,th = box[1],box[2],box[3]
if n and tw and th then
local op = object.path
local first, second, fourth = op[1], op[2], op[4]
local tx, ty = first.x_coord, first.y_coord
local sx, sy = (second.x_coord - tx)/tw, (fourth.y_coord - ty)/th
local rx, ry = (second.y_coord - ty)/tw, (fourth.x_coord - tx)/th
if sx == 0 then sx = 0.00001 end
if sy == 0 then sy = 0.00001 end
start_pdf_code()
pdf_literalcode("%f %f %f %f %f %f cm",sx,rx,ry,sy,tx,ty)
texsprint(format("\\mplibputtextbox{%i}",n))
stop_pdf_code()
end
end
local pdf_objs = {}
if not pdfmode then
texsprint("\\special{pdf:obj @MPlibTr<<>>}",
"\\special{pdf:obj @MPlibSh<<>>}")
end
-- objstr <string> => obj <number>, new <boolean>
local function update_pdfobjs (os)
local on = pdf_objs[os]
if on then
return on,false
end
if pdfmode then
on = pdf.immediateobj(os)
else
on = pdf_objs.cnt or 0
pdf_objs.cnt = on + 1
end
pdf_objs[os] = on
return on,true
end
local transparancy_modes = { [0] = "Normal",
"Normal", "Multiply", "Screen", "Overlay",
"SoftLight", "HardLight", "ColorDodge", "ColorBurn",
"Darken", "Lighten", "Difference", "Exclusion",
"Hue", "Saturation", "Color", "Luminosity",
"Compatible",
}
local function update_tr_res(res,mode,opaq)
local os = format("<</BM /%s/ca %.3f/CA %.3f/AIS false>>",mode,opaq,opaq)
local on, new = update_pdfobjs(os)
if new then
if pdfmode then
res = format("%s/MPlibTr%i %i 0 R",res,on,on)
else
texsprint(format("\\special{pdf:put @MPlibTr<</MPlibTr%i%s>>}",on,os))
end
end
return res,on
end
local function tr_pdf_pageresources(mode,opaq)
local res, on_on, off_on = "", nil, nil
res, off_on = update_tr_res(res, "Normal", 1)
res, on_on = update_tr_res(res, mode, opaq)
if pdfmode then
if res ~= "" then
local tpr = tex.pdfpageresources -- respect luaotfload-colors
if not stringfind(tpr,"/ExtGState<<.*>>") then
tpr = tpr.."/ExtGState<<>>"
end
tpr = stringgsub(tpr,"/ExtGState<<","%1"..res)
tex.set("global","pdfpageresources",tpr)
end
else
texsprint(format("\\special{pdf:put @resources<</ExtGState @MPlibTr>>}"))
end
return on_on, off_on
end
local shading_res
local getpageres = pdf.getpageresources or function() return pdf.pageresources end
local setpageres = pdf.setpageresources or function(s) pdf.pageresources = s end
local function shading_initialize ()
shading_res = {}
if pdfmode then
require('luatexbase.mcb')
if luatexbase.is_active_callback then -- luatexbase 0.7+
local shading_obj = pdf.reserveobj()
setpageres(format("%s/Shading %i 0 R",getpageres() or "",shading_obj))
luatexbase.add_to_callback("finish_pdffile", function()
pdf.immediateobj(shading_obj,format("<<%s>>",tableconcat(shading_res)))
end, "luamplib.finish_pdffile")
pdf_objs.finishpdf = true
end
end
end
local function sh_pdfpageresources(shtype,domain,colorspace,colora,colorb,coordinates)
if not shading_res then shading_initialize() end
local os = format("<</FunctionType 2/Domain [ %s ]/C0 [ %s ]/C1 [ %s ]/N 1>>",
domain, colora, colorb)
local funcobj = pdfmode and format("%i 0 R",update_pdfobjs(os)) or os
os = format("<</ShadingType %i/ColorSpace /%s/Function %s/Coords [ %s ]/Extend [ true true ]/AntiAlias true>>",
shtype, colorspace, funcobj, coordinates)
local on, new = update_pdfobjs(os)
if pdfmode then
if new then
local res = format("/MPlibSh%i %i 0 R", on, on)
if pdf_objs.finishpdf then
shading_res[#shading_res+1] = res
else
local pageres = getpageres() or ""
if not stringfind(pageres,"/Shading<<.*>>") then
pageres = pageres.."/Shading<<>>"
end
pageres = stringgsub(pageres,"/Shading<<","%1"..res)
setpageres(pageres)
end
end
else
if new then
texsprint(format("\\special{pdf:put @MPlibSh<</MPlibSh%i%s>>}",on,os))
end
texsprint(format("\\special{pdf:put @resources<</Shading @MPlibSh>>}"))
end
return on
end
local function color_normalize(ca,cb)
if #cb == 1 then
if #ca == 4 then
cb[1], cb[2], cb[3], cb[4] = 0, 0, 0, 1-cb[1]
else -- #ca = 3
cb[1], cb[2], cb[3] = cb[1], cb[1], cb[1]
end
elseif #cb == 3 then -- #ca == 4
cb[1], cb[2], cb[3], cb[4] = 1-cb[1], 1-cb[2], 1-cb[3], 0
end
end
local function do_preobj_color(object,prescript)
-- transparency
local opaq = prescript and prescript.tr_transparency
local tron_no, troff_no
if opaq then
local mode = prescript.tr_alternative or 1
mode = transparancy_modes[tonumber(mode)]
tron_no, troff_no = tr_pdf_pageresources(mode,opaq)
pdf_literalcode("/MPlibTr%i gs",tron_no)
end
-- color
local cs = object.color
if cs and #cs > 0 then
pdf_literalcode(luamplib.colorconverter(cs))
end
-- shading
local sh_type = prescript and prescript.sh_type
if sh_type then
local domain = prescript.sh_domain
local centera = stringexplode(prescript.sh_center_a)
local centerb = stringexplode(prescript.sh_center_b)
for _,t in pairs({centera,centerb}) do
for i,v in ipairs(t) do
t[i] = format("%f",v)
end
end
centera = tableconcat(centera," ")
centerb = tableconcat(centerb," ")
local colora = prescript.sh_color_a or {0};
local colorb = prescript.sh_color_b or {1};
for _,t in pairs({colora,colorb}) do
for i,v in ipairs(t) do
t[i] = format("%.3f",v)
end
end
if #colora > #colorb then
color_normalize(colora,colorb)
elseif #colorb > #colora then
color_normalize(colorb,colora)
end
local colorspace
if #colorb == 1 then colorspace = "DeviceGray"
elseif #colorb == 3 then colorspace = "DeviceRGB"
elseif #colorb == 4 then colorspace = "DeviceCMYK"
else return troff_no
end
colora = tableconcat(colora, " ")
colorb = tableconcat(colorb, " ")
local shade_no
if sh_type == "linear" then
local coordinates = tableconcat({centera,centerb}," ")
shade_no = sh_pdfpageresources(2,domain,colorspace,colora,colorb,coordinates)
elseif sh_type == "circular" then
local radiusa = format("%f",prescript.sh_radius_a)
local radiusb = format("%f",prescript.sh_radius_b)
local coordinates = tableconcat({centera,radiusa,centerb,radiusb}," ")
shade_no = sh_pdfpageresources(3,domain,colorspace,colora,colorb,coordinates)
end
pdf_literalcode("q /Pattern cs")
return troff_no,shade_no
end
return troff_no
end
local function do_postobj_color(tr,sh)
if sh then
pdf_literalcode("W n /MPlibSh%s sh Q",sh)
end
if tr then
pdf_literalcode("/MPlibTr%i gs",tr)
end
end
local function flush(result,flusher)
if result then
local figures = result.fig
if figures then
for f=1, #figures do
info("flushing figure %s",f)
local figure = figures[f]
local objects = getobjects(result,figure,f)
local fignum = tonumber(stringmatch(figure:filename(),"([%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
if TeX_code_t[f] then
texsprint(TeX_code_t[f])
end
pdf_startfigure(fignum,llx,lly,urx,ury)
start_pdf_code()
if objects then
for o=1,#objects do
local object = objects[o]
local objecttype = object.type
local prescript = object.prescript
prescript = prescript and script2table(prescript) -- prescript is now a table
local tr_opaq,shade_no = do_preobj_color(object,prescript)
if prescript and prescript.MPlibTEXboxID then
putTEXboxes(object,prescript)
elseif objecttype == "start_bounds" or objecttype == "stop_bounds" then
-- skip
elseif objecttype == "start_clip" then
start_pdf_code()
flushnormalpath(object.path,t,false)
pdf_literalcode("W n")
elseif objecttype == "stop_clip" then
stop_pdf_code()
miterlimit, linecap, linejoin, dashed = -1, -1, -1, false
elseif objecttype == "special" then
-- not supported
if prescript and prescript.MPlibTEXError then
warn("textext() anomaly. Try disabling \\mplibtextextlabel.")
end
elseif objecttype == "text" then
local ot = object.transform -- 3,4,5,6,1,2
start_pdf_code()
pdf_literalcode("%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)
stop_pdf_code()
else
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",tableconcat(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
start_pdf_code()
end
if path then
if transformed then
flushconcatpath(path,open)
else
flushnormalpath(path,open)
end
if not shade_no then ----- conflict with shading
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
end
if transformed then
stop_pdf_code()
end
local path = object.htap
if path then
if transformed then
start_pdf_code()
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
stop_pdf_code()
end
end
-- if cr then
-- pdf_literalcode(cr)
-- end
end
do_postobj_color(tr_opaq,shade_no)
end
end
stop_pdf_code()
pdf_stopfigure()
end
end
end
end
end
luamplib.flush = flush
local function 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
luamplib.colorconverter = colorconverter
--
-- End of File `luamplib.lua'.
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