-- -- 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 = 2.1, date = "2013/12/19", 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 tableconcat = table.concat local texsprint = tex.sprint local mplib = require ('mplib') local kpse = require ('kpse') 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 mpkpse = kpse.new("luatex", "mpost") local function finder(name, mode, ftype) if mode == "w" then return name else return mpkpse:find_file(name,ftype) 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 ; input %s ; ]] luamplib.make = luamplib.make or function() end function luamplib.load(name) local mpx = mplib.new { ini_version = true, find_file = luamplib.finder, } 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") elseif result.status > 0 then local t, e, l = result.term, result.error, result.log if t then info(t) end if e then err(e) end if not t and not e and l then luamplib.lastlog = luamplib.lastlog .. "\n " .. l log(l) else err("unknown, no error, terminal or log messages") end else return false end return true end local function process_indeed (mpx, data) local converted, result = false, {} local mpx = luamplib.load(mpx) if mpx and data then local result = mpx:execute(data) if not result then err("no result object returned") elseif result.status > 0 then err("%s",(result.term or "no-term") .. "\n" .. (result.error or "no-error")) elseif luamplib.showlog then luamplib.lastlog = luamplib.lastlog .. "\n" .. result.term info("%s",result.term or "no-term") elseif result.fig then converted = luamplib.convert(result) else err("unknown error, maybe no beginfig/endfig") end else err("Mem file unloadable. Maybe generated with a different version of mplib?") end return converted, result end local process = function (data) return process_indeed(currentformat, data) 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) text = text:gsub(".","\\hbox{%1}") -- kerning happens in metapost 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 mplibcodepreamblefirst = [[ def textext (expr t) = image( special "%%mkTEXbox:"&t; ) enddef; let TEX = textext; def VerbatimTeX (text t) = enddef; ]] local mplibcodepreamblesecond = [[ vardef textext (text t) = TEXBOX_ := TEXBOX_ + 1; image ( addto currentpicture doublepath unitsquare xscaled TEXBOX_wd[TEXBOX_] yscaled (TEXBOX_ht[TEXBOX_] + TEXBOX_dp[TEXBOX_]) shifted (0, -TEXBOX_dp[TEXBOX_]) withprescript "%%TEXtxtbox:" & decimal TEXBOX_ & ":" & decimal TEXBOX_wd[TEXBOX_] & ":" & decimal(TEXBOX_ht[TEXBOX_]+TEXBOX_dp[TEXBOX_]); ) enddef; def TEX (text t) = textext (t) enddef; def VerbatimTeX (text t) = message "verbatimtex '"& t &"' is ignored"; enddef; ]] local factor = 65536*(7227/7200) local function putTEXboxes (object) local n,tw,th = stringmatch(object.prescript, "%%%%TEXtxtbox:(%d+):([%d%.%+%-]+):([%d%.%+%-]+)") 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 local cs = object.color if cs and #cs > 0 then cs = luamplib.colorconverter(cs) end pdf_literalcode("q %f %f %f %f %f %f cm",sx,rx,ry,sy,tx,ty) if cs then pdf_literalcode(cs) end texsprint(format("\\mplibputtextbox{%i}",n)) pdf_literalcode("Q") end end local function domakeTEXboxes (data) local num = tex.count[14] -- newbox register if data and data.fig then local figures = data.fig for f=1, #figures do 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 local str = prescript and stringmatch(prescript, "%%%%mkTEXbox:(.*)") if str then num = num + 1 texsprint(format("\\setbox%i\\hbox{%s}",num,str)) end end end end end end local function makeTEXboxes (data) data = stringgsub(data, "([^A-Z_a-z])btex([^A-Z_a-z])", function(pre,post) post = stringgsub(post,"%s","") return pre .. 'textext("' .. post end) data = stringgsub(data, "([^A-Z_a-z])verbatimtex([^A-Z_a-z])", function(pre,post) post = stringgsub(post,"%s","") return pre .. 'VerbatimTeX("' .. post end) data = stringgsub(data, "([^A-Z_a-z])etex([^A-Z_a-z])", function(pre,post) pre = stringgsub(pre,"%s","") return pre .. '")' .. post end) local mpx = luamplib.load(currentformat) if mpx and data then local result = mpx:execute(mplibcodepreamblefirst .. data) domakeTEXboxes(result) end return data end luamplib.makeTEXboxes = makeTEXboxes local function processwithTEXboxes (data) local num = tex.count[14] -- the same newbox register local prepreamble = "TEXBOX_ := "..num..";\n" while true do num = num + 1 local box = tex.box[num] if not box then break end prepreamble = prepreamble .. "TEXBOX_wd["..num.."] := "..box.width /factor..";\n".. "TEXBOX_ht["..num.."] := "..box.height/factor..";\n".. "TEXBOX_dp["..num.."] := "..box.depth /factor..";\n" end process(prepreamble .. mplibcodepreamblesecond .. data) end luamplib.processwithTEXboxes = processwithTEXboxes 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 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 local prescript = object.prescript --- [be]tex patch if prescript and stringfind(prescript,"%%%%TEXtxtbox:") then putTEXboxes(object) elseif 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 local cs = object.color if cs and #cs > 0 then cs = luamplib.colorconverter(cs) end pdf_literalcode("q %f %f %f %f %f %f cm",ot[3],ot[4],ot[5],ot[6],ot[1],ot[2]) if cs then pdf_literalcode(cs) end pdf_textfigure(object.font,object.dsize,object.text,object.width,object.height,object.depth) pdf_literalcode("Q") else local cs, cr = object.color, nil if cs and #cs > 0 then cs, cr = luamplib.colorconverter(cs) pdf_literalcode(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",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 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 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'.