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Diffstat (limited to 'src/fontloader/misc/fontloader-mplib.lua')
| -rw-r--r-- | src/fontloader/misc/fontloader-mplib.lua | 491 |
1 files changed, 491 insertions, 0 deletions
diff --git a/src/fontloader/misc/fontloader-mplib.lua b/src/fontloader/misc/fontloader-mplib.lua new file mode 100644 index 0000000..c6628ac --- /dev/null +++ b/src/fontloader/misc/fontloader-mplib.lua @@ -0,0 +1,491 @@ +if not modules then modules = { } end modules ['luatex-mplib'] = { + version = 1.001, + comment = "companion to luatex-mplib.tex", + author = "Hans Hagen & Taco Hoekwater", + copyright = "ConTeXt Development Team", + license = "public domain", +} + +--[[ldx-- +<p>This module is a stripped down version of libraries that are used +by <l n='context'/>. It can be used in other macro packages and/or +serve as an example. Embedding in a macro package is upto others and +normally boils down to inputting <t>supp-mpl.tex</t>.</p> +--ldx]]-- + +if metapost and metapost.version then + + --[[ldx-- + <p>Let's silently quit and make sure that no one loads it + manually in <l n='context'/>.</p> + --ldx]]-- + +else + + local format, concat, abs, match = string.format, table.concat, math.abs, string.match + + local mplib = require ('mplib') + local kpse = require ('kpse') + + --[[ldx-- + <p>We create a namespace and some variables to it. If a namespace is + already defined it wil not be initialized. This permits hooking + in code beforehand.</p> + + <p>We don't make a format automatically. After all, distributions + might have their own preferences and normally a format (mem) file will + have some special place in the <l n='tex'/> tree. Also, there can already + be format files, different memort settings and other nasty pitfalls that + we don't want to interfere with. If you want, you can define a function + <t>metapost.make(name,mem_name) that does the job.</t></p> + --ldx]]-- + + metapost = metapost or { } + metapost.version = 1.00 + metapost.showlog = metapost.showlog or false + metapost.lastlog = "" + + --[[ldx-- + <p>A few helpers, taken from <t>l-file.lua</t>.</p> + --ldx]]-- + + local file = file or { } + + function file.replacesuffix(filename, suffix) + return (string.gsub(filename,"%.[%a%d]+$","")) .. "." .. suffix + end + + function file.stripsuffix(filename) + return (string.gsub(filename,"%.[%a%d]+$","")) + end + + --[[ldx-- + <p>We use the <l n='kpse'/> library unless a finder is already + defined.</p> + --ldx]]-- + + local mpkpse = kpse.new("luatex","mpost") + + metapost.finder = metapost.finder or function(name, mode, ftype) + if mode == "w" then + return name + else + return mpkpse:find_file(name,ftype) + end + end + + --[[ldx-- + <p>You can use your own reported if needed, as long as it handles multiple + arguments and formatted strings.</p> + --ldx]]-- + + metapost.report = metapost.report or function(...) + texio.write(format("<mplib: %s>",format(...))) + end + + --[[ldx-- + <p>The rest of this module is not documented. More info can be found in the + <l n='luatex'/> manual, articles in user group journals and the files that + ship with <l n='context'/>.</p> + --ldx]]-- + + function metapost.resetlastlog() + metapost.lastlog = "" + end + + local mplibone = tonumber(mplib.version()) <= 1.50 + + if mplibone then + + metapost.make = metapost.make or function(name,mem_name,dump) + local t = os.clock() + local mpx = mplib.new { + ini_version = true, + find_file = metapost.finder, + job_name = file.stripsuffix(name) + } + mpx:execute(string.format("input %s ;",name)) + if dump then + mpx:execute("dump ;") + metapost.report("format %s made and dumped for %s in %0.3f seconds",mem_name,name,os.clock()-t) + else + metapost.report("%s read in %0.3f seconds",name,os.clock()-t) + end + return mpx + end + + function metapost.load(name) + local mem_name = file.replacesuffix(name,"mem") + local mpx = mplib.new { + ini_version = false, + mem_name = mem_name, + find_file = metapost.finder + } + if not mpx and type(metapost.make) == "function" then + -- when i have time i'll locate the format and dump + mpx = metapost.make(name,mem_name) + end + if mpx then + metapost.report("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 ; + ]] + + metapost.make = metapost.make or function() + end + + function metapost.load(name) + local mpx = mplib.new { + ini_version = true, + find_file = metapost.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 + metapost.reporterror(result) + return mpx, result + end + + end + + function metapost.unload(mpx) + if mpx then + mpx:finish() + end + end + + function metapost.reporterror(result) + if not result then + metapost.report("mp error: no result object returned") + elseif result.status > 0 then + local t, e, l = result.term, result.error, result.log + if t then + metapost.report("mp terminal: %s",t) + end + if e then + metapost.report("mp error: %s", e) + end + if not t and not e and l then + metapost.lastlog = metapost.lastlog .. "\n " .. l + metapost.report("mp log: %s",l) + else + metapost.report("mp error: unknown, no error, terminal or log messages") + end + else + return false + end + return true + end + + function metapost.process(mpx, data) + local converted, result = false, {} + mpx = metapost.load(mpx) + if mpx and data then + local result = mpx:execute(data) + if not result then + metapost.report("mp error: no result object returned") + elseif result.status > 0 then + metapost.report("mp error: %s",(result.term or "no-term") .. "\n" .. (result.error or "no-error")) + elseif metapost.showlog then + metapost.lastlog = metapost.lastlog .. "\n" .. result.term + metapost.report("mp info: %s",result.term or "no-term") + elseif result.fig then + converted = metapost.convert(result) + else + metapost.report("mp error: unknown error, maybe no beginfig/endfig") + end + else + metapost.report("mp error: mem file not found") + end + return converted, result + end + + local function getobjects(result,figure,f) + return figure:objects() + end + + function metapost.convert(result, flusher) + metapost.flush(result, flusher) + return true -- done + end + + --[[ldx-- + <p>We removed some message and tracing code. We might even remove the flusher</p> + --ldx]]-- + + local function pdf_startfigure(n,llx,lly,urx,ury) + tex.sprint(format("\\startMPLIBtoPDF{%s}{%s}{%s}{%s}",llx,lly,urx,ury)) + end + + local function pdf_stopfigure() + tex.sprint("\\stopMPLIBtoPDF") + 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) + 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 + + --[[ldx-- + <p>Support for specials has been removed.</p> + --ldx]]-- + + function metapost.flush(result,flusher) + if result then + local figures = result.fig + if figures then + for f=1, #figures do + metapost.report("flushing figure %s",f) + local figure = figures[f] + local objects = getobjects(result,figure,f) + local fignum = tonumber(match(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 + 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(metapost.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 metapost.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 |