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-rw-r--r--Master/texmf-dist/tex/context/base/mkxl/mlib-pps.lmt1647
1 files changed, 1647 insertions, 0 deletions
diff --git a/Master/texmf-dist/tex/context/base/mkxl/mlib-pps.lmt b/Master/texmf-dist/tex/context/base/mkxl/mlib-pps.lmt
new file mode 100644
index 00000000000..32f23c39d27
--- /dev/null
+++ b/Master/texmf-dist/tex/context/base/mkxl/mlib-pps.lmt
@@ -0,0 +1,1647 @@
+if not modules then modules = { } end modules ['mlib-pps'] = {
+ version = 1.001,
+ comment = "companion to mlib-ctx.mkiv",
+ author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+ copyright = "PRAGMA ADE / ConTeXt Development Team",
+ license = "see context related readme files",
+}
+
+local format, gmatch, match, split, gsub = string.format, string.gmatch, string.match, string.split, string.gsub
+local tonumber, type, unpack, next, select = tonumber, type, unpack, next, select
+local round, sqrt, min, max = math.round, math.sqrt, math.min, math.max
+local insert, remove, concat = table.insert, table.remove, table.concat
+local Cs, Cf, C, Cg, Ct, P, S, V, Carg = lpeg.Cs, lpeg.Cf, lpeg.C, lpeg.Cg, lpeg.Ct, lpeg.P, lpeg.S, lpeg.V, lpeg.Carg
+local lpegmatch, tsplitat, tsplitter = lpeg.match, lpeg.tsplitat, lpeg.tsplitter
+local formatters = string.formatters
+local exists, savedata = io.exists, io.savedata
+
+local mplib = mplib
+local metapost = metapost
+local lpdf = lpdf
+local context = context
+
+local scan = mp.scan
+local inject = mp.inject
+
+local mpscanstring = scan.string
+local mpscannumeric = scan.numeric
+
+local injecttriplet = inject.triplet
+
+local registerscript = metapost.registerscript
+
+local implement = interfaces.implement
+local setmacro = interfaces.setmacro
+
+local texsetbox = tex.setbox
+local textakebox = tex.takebox -- or: nodes.takebox
+local texrunlocal = tex.runlocal
+local copy_list = node.copy_list
+local flush_list = node.flush_list
+local setmetatableindex = table.setmetatableindex
+local sortedhash = table.sortedhash
+
+local new_hlist = nodes.pool.hlist
+
+local starttiming = statistics.starttiming
+local stoptiming = statistics.stoptiming
+
+local trace_runs = false trackers.register("metapost.runs", function(v) trace_runs = v end)
+local trace_textexts = false trackers.register("metapost.textexts", function(v) trace_textexts = v end)
+local trace_scripts = false trackers.register("metapost.scripts", function(v) trace_scripts = v end)
+local trace_btexetex = false trackers.register("metapost.btexetex", function(v) trace_btexetex = v end)
+
+local report_metapost = logs.reporter("metapost")
+local report_textexts = logs.reporter("metapost","textexts")
+local report_scripts = logs.reporter("metapost","scripts")
+
+local colors = attributes.colors
+local defineprocesscolor = colors.defineprocesscolor
+local definespotcolor = colors.definespotcolor
+local definemultitonecolor = colors.definemultitonecolor
+local colorvalue = colors.value
+
+local transparencies = attributes.transparencies
+local registertransparency = transparencies.register
+local transparencyvalue = transparencies.value
+
+local rgbtocmyk = colors.rgbtocmyk -- or function() return 0,0,0,1 end
+local cmyktorgb = colors.cmyktorgb -- or function() return 0,0,0 end
+local rgbtogray = colors.rgbtogray -- or function() return 0 end
+local cmyktogray = colors.cmyktogray -- or function() return 0 end
+
+local nooutercolor = "0 g 0 G"
+local nooutertransparency = "/Tr0 gs" -- only when set
+local outercolormode = 0
+local outercolormodel = 1
+local outercolor = nooutercolor
+local outertransparency = nooutertransparency
+local innercolor = nooutercolor
+local innertransparency = nooutertransparency
+
+local pdfcolor = lpdf.color
+local pdftransparency = lpdf.transparency
+
+function metapost.setoutercolor(mode,colormodel,colorattribute,transparencyattribute)
+ -- has always to be called before conversion
+ -- todo: transparency (not in the mood now)
+ outercolormode = mode
+ outercolormodel = colormodel
+ if mode == 1 or mode == 3 then
+ -- inherit from outer (registered color)
+ outercolor = pdfcolor(colormodel,colorattribute) or nooutercolor
+ outertransparency = pdftransparency(transparencyattribute) or nooutertransparency
+ elseif mode == 2 then
+ -- stand alone (see m-punk.tex)
+ outercolor = ""
+ outertransparency = ""
+ else -- 0
+ outercolor = nooutercolor
+ outertransparency = nooutertransparency
+ end
+ innercolor = outercolor
+ innertransparency = outertransparency -- not yet used
+end
+
+-- todo: get this from the lpdf module
+
+local f_f = formatters["%.6N"]
+local f_f3 = formatters["%.3N"]
+local f_gray = formatters["%.3N g %.3N G"]
+local f_rgb = formatters["%.3N %.3N %.3N rg %.3N %.3N %.3N RG"]
+local f_cmyk = formatters["%.3N %.3N %.3N %.3N k %.3N %.3N %.3N %.3N K"]
+local f_cm_b = formatters["q %.6N %.6N %.6N %.6N %.6N %.6N cm"]
+local f_scn = formatters["%.3N"]
+
+local f_shade = formatters["MpSh%s"]
+local f_spot = formatters["/%s cs /%s CS %s SCN %s scn"]
+local s_cm_e = "Q"
+
+local function checked_color_pair(color,...)
+ if not color then
+ return innercolor, outercolor
+ end
+ if outercolormode == 3 then
+ innercolor = color(...)
+ return innercolor, innercolor
+ else
+ return color(...), outercolor
+ end
+end
+
+function metapost.colorinitializer()
+ innercolor = outercolor
+ innertransparency = outertransparency
+ return outercolor, outertransparency
+end
+
+--~
+
+local specificationsplitter = tsplitat(" ")
+local colorsplitter = tsplitter(":",tonumber) -- no need for :
+local domainsplitter = tsplitter(" ",tonumber)
+local centersplitter = domainsplitter
+local coordinatesplitter = domainsplitter
+
+-- thanks to taco's reading of the postscript manual:
+--
+-- x' = sx * x + ry * y + tx
+-- y' = rx * x + sy * y + ty
+
+local nofshades = 0 -- todo: hash resources, start at 1000 in order not to clash with older
+
+local function 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
+ cb[1], cb[2], cb[3] = cb[1], cb[1], cb[1]
+ end
+ elseif #cb == 3 then
+ if #ca == 4 then
+ cb[1], cb[2], cb[3], cb[4] = rgbtocmyk(cb[1],cb[2],cb[3])
+ else
+ cb[1], cb[2], cb[3] = cmyktorgb(cb[1],cb[2],cb[3],cb[4])
+ end
+ end
+end
+
+
+local commasplitter = tsplitat(",")
+
+local function checkandconvertspot(n_a,f_a,c_a,v_a,n_b,f_b,c_b,v_b)
+ -- must be the same but we don't check
+ local name = f_shade(nofshades)
+ local ca = lpegmatch(commasplitter,v_a)
+ local cb = lpegmatch(commasplitter,v_b)
+ if #ca == 0 or #cb == 0 then
+ return { 0 }, { 1 }, "DeviceGray", name
+ else
+ for i=1,#ca do ca[i] = tonumber(ca[i]) or 0 end
+ for i=1,#cb do cb[i] = tonumber(cb[i]) or 1 end
+ --~ spotcolorconverter(n_a,f_a,c_a,v_a) -- not really needed
+ return ca, cb, n_a or n_b, name
+ end
+end
+
+local function checkandconvert(ca,cb,model)
+ local name = f_shade(nofshades)
+ if not ca or not cb or type(ca) == "string" then
+ return { 0 }, { 1 }, "DeviceGray", name
+ else
+ if #ca > #cb then
+ normalize(ca,cb)
+ elseif #ca < #cb then
+ normalize(cb,ca)
+ end
+ if not model then
+ model = colors.currentnamedmodel()
+ end
+ if model == "all" then
+ model= (#ca == 4 and "cmyk") or (#ca == 3 and "rgb") or "gray"
+ end
+ if model == "rgb" then
+ if #ca == 4 then
+ ca = { cmyktorgb(ca[1],ca[2],ca[3],ca[4]) }
+ cb = { cmyktorgb(cb[1],cb[2],cb[3],cb[4]) }
+ elseif #ca == 1 then
+ local a = 1 - ca[1]
+ local b = 1 - cb[1]
+ ca = { a, a, a }
+ cb = { b, b, b }
+ end
+ return ca, cb, "DeviceRGB", name, model
+ elseif model == "cmyk" then
+ if #ca == 3 then
+ ca = { rgbtocmyk(ca[1],ca[2],ca[3]) }
+ cb = { rgbtocmyk(cb[1],cb[2],cb[3]) }
+ elseif #ca == 1 then
+ ca = { 0, 0, 0, ca[1] }
+ cb = { 0, 0, 0, ca[1] }
+ end
+ return ca, cb, "DeviceCMYK", name, model
+ else
+ if #ca == 4 then
+ ca = { cmyktogray(ca[1],ca[2],ca[3],ca[4]) }
+ cb = { cmyktogray(cb[1],cb[2],cb[3],cb[4]) }
+ elseif #ca == 3 then
+ ca = { rgbtogray(ca[1],ca[2],ca[3]) }
+ cb = { rgbtogray(cb[1],cb[2],cb[3]) }
+ end
+ -- backend specific (will be renamed)
+ return ca, cb, "DeviceGray", name, model
+ end
+ end
+end
+
+-- We keep textexts in a shared list (as it's easier that way and we also had that in
+-- the beginning). Each graphic gets its own (1 based) subtable so that we can also
+-- handle multiple conversions in one go which is needed when we process mp files
+-- directly.
+
+local stack = { } -- quick hack, we will pass topofstack around
+local top = nil
+local nofruns = 0 -- askedfig: "all", "first", number
+
+local function preset(t,k)
+ -- references to textexts by mp index
+ local v = {
+ textrial = 0,
+ texfinal = 0,
+ texslots = { },
+ texorder = { },
+ texhash = { },
+ }
+ t[k] = v
+ return v
+end
+
+local function startjob(plugmode,kind,mpx)
+ insert(stack,top)
+ top = {
+ textexts = { }, -- all boxes, optionally with a different color
+ texstrings = { },
+ texregimes = { },
+ mapstrings = { },
+ mapindices = { },
+ mapmoves = { },
+ texlast = 0,
+ texdata = setmetatableindex({},preset), -- references to textexts in order or usage
+ plugmode = plugmode, -- some day we can then skip all pre/postscripts
+ extradata = mpx and metapost.getextradata(mpx),
+ }
+ if trace_runs then
+ report_metapost("starting %s run at level %i in %s mode",
+ kind,#stack+1,plugmode and "plug" or "normal")
+ end
+ return top
+end
+
+local function stopjob()
+ if top then
+ for slot, content in next, top.textexts do
+ if content then
+ flush_list(content)
+ if trace_textexts then
+ report_textexts("freeing text %s",slot)
+ end
+ end
+ end
+ if trace_runs then
+ report_metapost("stopping run at level %i",#stack+1)
+ end
+ top = remove(stack)
+ return top
+ end
+end
+
+function metapost.getjobdata()
+ return top
+end
+
+-- end of new
+
+local settext = function(box,slot,str)
+ if top then
+ -- if trace_textexts then
+ -- report_textexts("getting text %s from box %s",slot,box)
+ -- end
+ top.textexts[slot] = textakebox(box)
+ end
+end
+
+local gettext = function(box,slot)
+ if top then
+ texsetbox(box,top.textexts[slot])
+ top.textexts[slot] = false
+ -- if trace_textexts then
+ -- report_textexts("putting text %s in box %s",slot,box)
+ -- end
+ end
+end
+
+metapost.settext = settext
+metapost.gettext = gettext
+
+implement { name = "mpsettext", actions = settext, arguments = { "integer", "integer" } } -- box slot
+implement { name = "mpgettext", actions = gettext, arguments = { "integer", "integer" } } -- box slot
+
+-- rather generic pdf, so use this elsewhere too it no longer pays
+-- off to distinguish between outline and fill (we now have both
+-- too, e.g. in arrows)
+
+metapost.reducetogray = true
+
+local models = { }
+
+function models.all(cr)
+ local n = #cr
+ if n == 0 then
+ return checked_color_pair()
+ elseif metapost.reducetogray then
+ if n == 1 then
+ local s = cr[1]
+ return checked_color_pair(f_gray,s,s)
+ elseif n == 3 then
+ local r = cr[1]
+ local g = cr[2]
+ local b = cr[3]
+ if r == g and g == b then
+ return checked_color_pair(f_gray,r,r)
+ else
+ return checked_color_pair(f_rgb,r,g,b,r,g,b)
+ end
+ else
+ local c = cr[1]
+ local m = cr[2]
+ local y = cr[3]
+ local k = cr[4]
+ if c == m and m == y and y == 0 then
+ k = 1 - k
+ return checked_color_pair(f_gray,k,k)
+ else
+ return checked_color_pair(f_cmyk,c,m,y,k,c,m,y,k)
+ end
+ end
+ elseif n == 1 then
+ local s = cr[1]
+ return checked_color_pair(f_gray,s,s)
+ elseif n == 3 then
+ local r = cr[1]
+ local g = cr[2]
+ local b = cr[3]
+ return checked_color_pair(f_rgb,r,g,b,r,g,b)
+ else
+ local c = cr[1]
+ local m = cr[2]
+ local y = cr[3]
+ local k = cr[4]
+ return checked_color_pair(f_cmyk,c,m,y,k,c,m,y,k)
+ end
+end
+
+function models.rgb(cr)
+ local n = #cr
+ if n == 0 then
+ return checked_color_pair()
+ elseif metapost.reducetogray then
+ if n == 1 then
+ local s = cr[1]
+ checked_color_pair(f_gray,s,s)
+ elseif n == 3 then
+ local r = cr[1]
+ local g = cr[2]
+ local b = cr[3]
+ if r == g and g == b then
+ return checked_color_pair(f_gray,r,r)
+ else
+ return checked_color_pair(f_rgb,r,g,b,r,g,b)
+ end
+ else
+ local c = cr[1]
+ local m = cr[2]
+ local y = cr[3]
+ local k = cr[4]
+ if c == m and m == y and y == 0 then
+ k = 1 - k
+ return checked_color_pair(f_gray,k,k)
+ else
+ local r, g, b = cmyktorgb(c,m,y,k)
+ return checked_color_pair(f_rgb,r,g,b,r,g,b)
+ end
+ end
+ elseif n == 1 then
+ local s = cr[1]
+ return checked_color_pair(f_gray,s,s)
+ else
+ local r = cr[1]
+ local g = cr[2]
+ local b = cr[3]
+ local r, g, b
+ if n == 3 then
+ r, g, b = cmyktorgb(r,g,b,cr[4])
+ end
+ return checked_color_pair(f_rgb,r,g,b,r,g,b)
+ end
+end
+
+function models.cmyk(cr)
+ local n = #cr
+ if n == 0 then
+ return checked_color_pair()
+ elseif metapost.reducetogray then
+ if n == 1 then
+ local s = cr[1]
+ return checked_color_pair(f_gray,s,s)
+ elseif n == 3 then
+ local r = cr[1]
+ local g = cr[2]
+ local b = cr[3]
+ if r == g and g == b then
+ return checked_color_pair(f_gray,r,r)
+ else
+ local c, m, y, k = rgbtocmyk(r,g,b)
+ return checked_color_pair(f_cmyk,c,m,y,k,c,m,y,k)
+ end
+ else
+ local c = cr[1]
+ local m = cr[2]
+ local y = cr[3]
+ local k = cr[4]
+ if c == m and m == y and y == 0 then
+ k = 1 - k
+ return checked_color_pair(f_gray,k,k)
+ else
+ return checked_color_pair(f_cmyk,c,m,y,k,c,m,y,k)
+ end
+ end
+ elseif n == 1 then
+ local s = cr[1]
+ return checked_color_pair(f_gray,s,s)
+ else
+ local c = cr[1]
+ local m = cr[2]
+ local y = cr[3]
+ local k = cr[4]
+ if n == 3 then
+ if c == m and m == y then
+ k, c, m, y = 1 - c, 0, 0, 0
+ else
+ c, m, y, k = rgbtocmyk(c,m,y)
+ end
+ end
+ return checked_color_pair(f_cmyk,c,m,y,k,c,m,y,k)
+ end
+end
+
+function models.gray(cr)
+ local n = #cr
+ local s = 0
+ if n == 0 then
+ return checked_color_pair()
+ elseif n == 4 then
+ s = cmyktogray(cr[1],cr[2],cr[3],cr[4])
+ elseif n == 3 then
+ s = rgbtogray(cr[1],cr[2],cr[3])
+ else
+ s = cr[1]
+ end
+ return checked_color_pair(f_gray,s,s)
+end
+
+models[1] = models.all
+models[2] = models.gray
+models[3] = models.rgb
+models[4] = models.cmyk
+
+setmetatableindex(models, function(t,k)
+ local v = models.gray
+ t[k] = v
+ return v
+end)
+
+local function colorconverter(cs)
+ return models[outercolormodel](cs)
+end
+
+local factor = 65536*(7227/7200)
+
+implement {
+ name = "mpsetsxsy",
+ arguments = { "dimen", "dimen", "dimen" },
+ actions = function(wd,ht,dp)
+ local hd = ht + dp
+ setmacro("mlib_sx",wd ~= 0 and factor/wd or 0)
+ setmacro("mlib_sy",hd ~= 0 and factor/hd or 0)
+ end
+}
+
+local function sxsy(wd,ht,dp) -- helper for text
+ local hd = ht + dp
+ return (wd ~= 0 and factor/wd) or 0, (hd ~= 0 and factor/hd) or 0
+end
+
+metapost.sxsy = sxsy
+
+-- for stock mp we need to declare the booleans first
+
+local do_begin_fig = "; beginfig(1) ; "
+local do_end_fig = "; endfig ;"
+local do_safeguard = ";"
+
+function metapost.preparetextextsdata()
+ local textexts = top.textexts
+ local collected = { }
+ for k, data in sortedhash(top.texdata) do -- sort is nicer in trace
+ local texorder = data.texorder
+ for n=1,#texorder do
+ local box = textexts[texorder[n]]
+ if box then
+ collected[n] = box
+ else
+ break
+ end
+ end
+ end
+ mp.mf_tt_initialize(collected)
+end
+
+local runmetapost = metapost.run
+
+local function checkaskedfig(askedfig) -- return askedfig, wrappit
+ if not askedfig then
+ return "direct", true
+ elseif askedfig == "all" then
+ return "all", false
+ elseif askedfig == "direct" then
+ return "all", true
+ else
+ askedfig = tonumber(askedfig)
+ if askedfig then
+ return askedfig, false
+ else
+ return "direct", true
+ end
+ end
+end
+
+-- This one is called from the \TEX\ end so the specification is different
+-- from the specification to metapost,run cum suis! The definitions and
+-- extension used to be handled here but are now delegated to the format
+-- initializers because we need to accumulate them for nested instances (a
+-- side effect of going single pass).
+
+function metapost.graphic_base_pass(specification)
+ local mpx = specification.mpx -- mandate
+ local top = startjob(true,"base",mpx)
+ local data = specification.data or ""
+ local inclusions = specification.inclusions or ""
+ local initializations = specification.initializations or ""
+ local askedfig,
+ wrappit = checkaskedfig(specification.figure)
+ nofruns = nofruns + 1
+ top.askedfig = askedfig
+ top.wrappit = wrappit
+ top.nofruns = nofruns
+ metapost.namespace = specification.namespace or ""
+ top.mpx = mpx
+ top.data = data
+ top.initializations = initializations
+ if trace_runs then
+ report_metapost("running job %s, asked figure %a",nofruns,askedfig)
+ end
+ runmetapost {
+ mpx = mpx,
+ askedfig = askedfig,
+ incontext = true,
+ data = {
+ inclusions,
+ wrappit and do_begin_fig or "",
+ initializations,
+ do_safeguard,
+ data,
+ wrappit and do_end_fig or "",
+ },
+ }
+ context(stopjob)
+end
+
+local function oldschool(mpx, data, trial_run, flusher, was_multi_pass, is_extra_pass, askedfig, incontext)
+ metapost.process {
+ mpx = mpx,
+ flusher = flusher,
+ askedfig = askedfig,
+ useplugins = incontext,
+ incontext = incontext,
+ data = data,
+ }
+end
+
+function metapost.process(specification,...)
+ if type(specification) ~= "table" then
+ oldschool(specification,...)
+ else
+ startjob(specification.incontext or specification.useplugins,"process",false)
+ runmetapost(specification)
+ stopjob()
+ end
+end
+
+-- -- the new plugin handler -- --
+
+local sequencers = utilities.sequencers
+local appendgroup = sequencers.appendgroup
+local appendaction = sequencers.appendaction
+
+local resetteractions = sequencers.new { arguments = "t" }
+local processoractions = sequencers.new { arguments = "object,prescript,before,after" }
+
+appendgroup(resetteractions, "system")
+appendgroup(processoractions,"system")
+
+-- later entries come first
+
+local scriptsplitter = Ct ( Ct (
+ C((1-S("= "))^1) * S("= ")^1 * C((1-S("\n\r"))^0) * S("\n\r")^0
+)^0 )
+
+local function splitprescript(script)
+ local hash = lpegmatch(scriptsplitter,script)
+ for i=#hash,1,-1 do
+ local h = hash[i]
+ if h == "reset" then
+ for k, v in next, hash do
+ if type(k) ~= "number" then
+ hash[k] = nil
+ end
+ end
+ else
+ hash[h[1]] = h[2]
+ end
+ end
+ if trace_scripts then
+ report_scripts(table.serialize(hash,"prescript"))
+ end
+ return hash
+end
+
+metapost.splitprescript = splitprescript
+
+-- -- not used:
+--
+-- local function splitpostscript(script)
+-- local hash = lpegmatch(scriptsplitter,script)
+-- for i=1,#hash do
+-- local h = hash[i]
+-- hash[h[1]] = h[2]
+-- end
+-- if trace_scripts then
+-- report_scripts(table.serialize(hash,"postscript"))
+-- end
+-- return hash
+-- end
+
+function metapost.pluginactions(what,t,flushfigure) -- before/after object, depending on what
+ if top and top.plugmode then -- hm, what about other features
+ for i=1,#what do
+ local wi = what[i]
+ if type(wi) == "function" then
+ -- assume injection
+ flushfigure(t) -- to be checked: too many 0 g 0 G
+ t = { }
+ wi()
+ else
+ t[#t+1] = wi
+ end
+ end
+ return t
+ end
+end
+
+function metapost.resetplugins(t) -- intialize plugins, before figure
+ if top and top.plugmode then
+ outercolormodel = colors.currentmodel() -- currently overloads the one set at the tex end
+ resetteractions.runner(t)
+ end
+end
+
+function metapost.processplugins(object) -- each object (second pass)
+ if top and top.plugmode then
+ local prescript = object.prescript -- specifications
+ if prescript and #prescript > 0 then
+ local before = { }
+ local after = { }
+ processoractions.runner(object,splitprescript(prescript) or { },before,after)
+ return #before > 0 and before, #after > 0 and after
+ else
+ local c = object.color
+ if c and #c > 0 then
+ local b, a = colorconverter(c)
+ return { b }, { a }
+ end
+ end
+ end
+end
+
+-- helpers
+
+local basepoints = number.dimenfactors["bp"]
+
+local function cm(object)
+ local op = object.path
+ if op then
+ local first = op[1]
+ local second = op[2]
+ local fourth = op[4]
+ if fourth then
+ local tx = first.x_coord
+ local ty = first.y_coord
+ local sx = second.x_coord - tx
+ local sy = fourth.y_coord - ty
+ local rx = second.y_coord - ty
+ local ry = fourth.x_coord - tx
+ if sx == 0 then sx = 0.00001 end
+ if sy == 0 then sy = 0.00001 end
+ return sx, rx, ry, sy, tx, ty
+ end
+ end
+ return 1, 0, 0, 1, 0, 0 -- weird case
+end
+
+metapost.cm = cm
+
+-- color
+
+local function cl_reset(t)
+ t[#t+1] = metapost.colorinitializer() -- only color
+end
+
+-- text
+
+local tx_reset, tx_process do
+
+ local eol = S("\n\r")^1
+ local cleaner = Cs((P("@@")/"@" + P("@")/"%%" + P(1))^0)
+ local splitter = Ct(
+ ( (
+ P("s:") * C((1-eol)^1)
+ + P("n:") * ((1-eol)^1/tonumber)
+ + P("b:") * ((1-eol)^1/toboolean)
+ ) * eol^0 )^0)
+
+ local function applyformat(s)
+ local t = lpegmatch(splitter,s)
+ if #t == 1 then
+ return s
+ else
+ local f = lpegmatch(cleaner,t[1])
+ return formatters[f](unpack(t,2))
+ end
+ end
+
+ local fmt = formatters["%s %s %s % t"]
+ ----- pat = tsplitat(":")
+ local pat = lpeg.tsplitter(":",tonumber) -- so that %F can do its work
+
+ local f_gray_yes = formatters["s=%.3N,a=%i,t=%.3N"]
+ local f_gray_nop = formatters["s=%.3N"]
+ local f_rgb_yes = formatters["r=%.3N,g=%.3N,b=%.3N,a=%.3N,t=%.3N"]
+ local f_rgb_nop = formatters["r=%.3N,g=%.3N,b=%.3N"]
+ local f_cmyk_yes = formatters["c=%.3N,m=%.3N,y=%.3N,k=%.3N,a=%.3N,t=%.3N"]
+ local f_cmyk_nop = formatters["c=%.3N,m=%.3N,y=%.3N,k=%.3N"]
+
+ local ctx_MPLIBsetNtext = context.MPLIBsetNtextX
+ local ctx_MPLIBsetCtext = context.MPLIBsetCtextX
+ local ctx_MPLIBsettext = context.MPLIBsettextX
+
+ local bp = number.dimenfactors.bp
+
+ local mp_index = 0
+ local mp_target = 0
+ local mp_c = nil
+ local mp_a = nil
+ local mp_t = nil
+
+ local function processtext()
+ local mp_text = top.texstrings[mp_index]
+ local mp_regime = top.texregimes[mp_index]
+ if mp_regime and tonumber(mp_regime) >= 0 then
+ mp_text = function()
+ context.sprint(mp_regime,top.texstrings[mp_index] or "")
+ end
+ end
+ if not mp_text then
+ report_textexts("missing text for index %a",mp_index)
+ elseif not mp_c then
+ ctx_MPLIBsetNtext(mp_target,mp_text)
+ elseif #mp_c == 1 then
+ if mp_a and mp_t then
+ ctx_MPLIBsetCtext(mp_target,f_gray_yes(mp_c[1],mp_a,mp_t),mp_text)
+ else
+ ctx_MPLIBsetCtext(mp_target,f_gray_nop(mp_c[1]),mp_text)
+ end
+ elseif #mp_c == 3 then
+ if mp_a and mp_t then
+ ctx_MPLIBsetCtext(mp_target,f_rgb_yes(mp_c[1],mp_c[2],mp_c[3],mp_a,mp_t),mp_text)
+ else
+ ctx_MPLIBsetCtext(mp_target,f_rgb_nop(mp_c[1],mp_c[2],mp_c[3]),mp_text)
+ end
+ elseif #mp_c == 4 then
+ if mp_a and mp_t then
+ ctx_MPLIBsetCtext(mp_target,f_cmyk_yes(mp_c[1],mp_c[2],mp_c[3],mp_c[4],mp_a,mp_t),mp_text)
+ else
+ ctx_MPLIBsetCtext(mp_target,f_cmyk_nop(mp_c[1],mp_c[2],mp_c[3],mp_c[4]),mp_text)
+ end
+ else
+ -- can't happen
+ ctx_MPLIBsetNtext(mp_target,mp_text)
+ end
+ end
+
+ local madetext = nil
+
+ local function mf_some_text(index,str,regime)
+ mp_target = index
+ mp_index = index
+ mp_c = nil
+ mp_a = nil
+ mp_t = nil
+ top.texstrings[mp_index] = str
+ top.texregimes[mp_index] = regime or -1
+ texrunlocal("mptexttoks")
+ local box = textakebox("mptextbox")
+ top.textexts[mp_target] = box
+ injecttriplet(bp*box.width,bp*box.height,bp*box.depth)
+ madetext = nil
+ end
+
+ local function mf_made_text(index)
+ mf_some_text(index,madetext,catcodes.numbers.ctxcatcodes) -- btex/etex ..
+ end
+
+ registerscript("sometextext", function() mf_some_text(mpscannumeric(),mpscanstring(),mpscannumeric()) end)
+ registerscript("madetextext", function() mf_made_text(mpscannumeric()) end)
+
+ -- a label can be anything, also something mp doesn't like in strings
+ -- so we return an index instead
+
+ function metapost.processing()
+ return top and true or false
+ end
+
+ function metapost.remaptext(replacement)
+ if top then
+ local mapstrings = top.mapstrings
+ local mapindices = top.mapindices
+ local label = replacement.label
+ local index = 0
+ if label then
+ local found = mapstrings[label]
+ if found then
+ setmetatableindex(found,replacement)
+ index = found.index
+ else
+ index = #mapindices + 1
+ replacement.index = index
+ mapindices[index] = replacement
+ mapstrings[label] = replacement
+ end
+ end
+ return index
+ else
+ return 0
+ end
+ end
+
+ function metapost.remappedtext(what)
+ return top and (top.mapstrings[what] or top.mapindices[tonumber(what)])
+ end
+
+ function mp.mf_map_move(index)
+ mp.triplet(top.mapmoves[index])
+ end
+
+ function mp.mf_map_text(index,str,regime)
+ local map = top.mapindices[tonumber(str)]
+ if type(map) == "table" then
+ local text = map.text
+ local overload = map.overload
+ local offset = 0
+ local width = 0
+ local where = nil
+ --
+ mp_index = index
+ -- the image text
+ if overload then
+ top.texstrings[mp_index] = map.template or map.label or "error"
+ top.texregimes[mp_index] = regime or -1
+ texrunlocal("mptexttoks")
+ local box = textakebox("mptextbox") or new_hlist()
+ width = bp * box.width
+ where = overload.where
+ end
+ -- the real text
+ top.texstrings[mp_index] = overload and overload.text or text or "error"
+ top.texregimes[mp_index] = regime or -1
+ texrunlocal("mptexttoks")
+ local box = textakebox("mptextbox") or new_hlist()
+ local twd = bp * box.width
+ local tht = bp * box.height
+ local tdp = bp * box.depth
+ -- the check
+ if where then
+ local scale = 1 -- / (map.scale or 1)
+ if where == "l" or where == "left" then
+ offset = scale * (twd - width)
+ elseif where == "m" or where == "middle" then
+ offset = scale * (twd - width) / 2
+ end
+ end
+ -- the result
+ top.textexts[mp_index] = box
+ top.mapmoves[mp_index] = { offset, map.dx or 0, map.dy or 0 }
+ --
+ mp.triplet(twd,tht,tdp)
+ madetext = nil
+ return
+ else
+ map = type(map) == "string" and map or str
+ return mf_some_text(index,context.escape(map) or map)
+ end
+ end
+
+ -- This is a bit messy. In regular metapost it's a kind of immediate replacement
+ -- so embedded btex ... etex is not really working as one would expect. We now have
+ -- a mix: it's immediate when we are at the outer level (rawmadetext) and indirect
+ -- (with the danger of stuff that doesn't work well in strings) when we are for
+ -- instance in a macro definition (rawtextext (pass back string)) ... of course one
+ -- should use textext so this is just a catch. When not in lmtx it's never immediate.
+
+ local reported = false
+ local alwayswrap = false -- CONTEXTLMTXMODE <= 1 -- was always nil due to typo
+
+ function metapost.maketext(s,mode)
+ if not reported then
+ reported = true
+ report_metapost("use 'textext(.....)' instead of 'btex ..... etex'")
+ end
+ if mode and mode == 1 then
+ if trace_btexetex then
+ report_metapost("ignoring verbatimtex: [[%s]]",s)
+ end
+ elseif alwayswrap then
+ if trace_btexetex then
+ report_metapost("rewrapping btex ... etex [[%s]]",s)
+ end
+ return 'rawtextext("' .. gsub(s,'"','"&ditto&"') .. '")' -- nullpicture
+ elseif metapost.currentmpxstatus() ~= 0 then
+ if trace_btexetex then
+ report_metapost("rewrapping btex ... etex at the outer level [[%s]]",s)
+ end
+ return 'rawtextext("' .. gsub(s,'"','"&ditto&"') .. '")' -- nullpicture
+ else
+ if trace_btexetex then
+ report_metapost("handling btex ... etex: [[%s]]",s)
+ end
+ -- madetext = utilities.strings.collapse(s)
+ madetext = s
+ return "rawmadetext" -- is assuming immediate processing
+ end
+ end
+
+ function mp.mf_formatted_text(index,fmt,...)
+ local t = { }
+ for i=1,select("#",...) do
+ local ti = select(i,...)
+ if type(ti) ~= "table" then
+ t[#t+1] = ti
+ end
+ end
+ local f = lpegmatch(cleaner,fmt)
+ local s = formatters[f](unpack(t)) or ""
+ mf_some_text(index,s)
+ end
+
+ interfaces.implement {
+ name = "mptexttoks",
+ actions = processtext,
+ }
+
+ tx_reset = function()
+ if top then
+ top.texhash = { }
+ top.texlast = 0
+ end
+ end
+
+ tx_process = function(object,prescript,before,after)
+ local data = top.texdata[metapost.properties.number] -- the current figure number, messy
+ local index = tonumber(prescript.tx_index)
+ if index then
+ if trace_textexts then
+ report_textexts("using index %a",index)
+ end
+ --
+ mp_c = object.color
+ if #mp_c == 0 then
+ local txc = prescript.tx_color
+ if txc then
+ mp_c = lpegmatch(pat,txc)
+ end
+ end
+ mp_a = tonumber(prescript.tr_alternative)
+ mp_t = tonumber(prescript.tr_transparency)
+ --
+ mp_index = index
+ mp_target = top.texlast - 1
+ top.texlast = mp_target
+ --
+ local mp_text = top.texstrings[mp_index]
+ local mp_hash = prescript.tx_cache
+ local box
+ if mp_hash == "no" then
+ texrunlocal("mptexttoks")
+ box = textakebox("mptextbox")
+ else
+ local cache = data.texhash
+ if mp_hash then
+ mp_hash = tonumber(mp_hash)
+ end
+ if mp_hash then
+ local extradata = top.extradata
+ if extradata then
+ cache = extradata.globalcache
+ if not cache then
+ cache = { }
+ extradata.globalcache = cache
+ end
+ if trace_runs then
+ if cache[mp_hash] then
+ report_textexts("reusing global entry %i",mp_hash)
+ else
+ report_textexts("storing global entry %i",mp_hash)
+ end
+ end
+ else
+ mp_hash = nil
+ end
+ end
+ if not mp_hash then
+ mp_hash = fmt(mp_text,mp_a or "-",mp_t or "-",mp_c or "-")
+ end
+ box = cache[mp_hash]
+ if box then
+ box = copy_list(box)
+ else
+ texrunlocal("mptexttoks")
+ box = textakebox("mptextbox")
+ cache[mp_hash] = box
+ end
+ end
+ top.textexts[mp_target] = box
+ --
+ if box then
+ -- we need to freeze the variables outside the function
+ local sx, rx, ry, sy, tx, ty = cm(object)
+ local target = mp_target
+ before[#before+1] = function()
+ context.MPLIBgettextscaledcm(target,
+ f_f(sx), -- bah ... %s no longer checks
+ f_f(rx), -- bah ... %s no longer checks
+ f_f(ry), -- bah ... %s no longer checks
+ f_f(sy), -- bah ... %s no longer checks
+ f_f(tx), -- bah ... %s no longer checks
+ f_f(ty), -- bah ... %s no longer checks
+ sxsy(box.width,box.height,box.depth))
+ end
+ else
+ before[#before+1] = function()
+ report_textexts("unknown %s",index)
+ end
+ end
+ if not trace_textexts then
+ object.path = false -- else: keep it
+ end
+ object.color = false
+ object.grouped = true
+ object.istext = true
+ end
+ end
+
+end
+
+-- we could probably redo normal textexts in the next way but as it's rather optimized
+-- we keep away from that (at least for now)
+
+local function bx_process(object,prescript,before,after)
+ local bx_category = prescript.bx_category
+ local bx_name = prescript.bx_name
+ if bx_category and bx_name then
+ if trace_textexts then
+ report_textexts("category %a, name %a",bx_category,bx_name)
+ end
+ local sx, rx, ry, sy, tx, ty = cm(object) -- needs to be frozen outside the function
+ local wd, ht, dp = nodes.boxes.dimensions(bx_category,bx_name)
+ before[#before+1] = function()
+ context.MPLIBgetboxscaledcm(bx_category,bx_name,
+ f_f(sx), -- bah ... %s no longer checks
+ f_f(rx), -- bah ... %s no longer checks
+ f_f(ry), -- bah ... %s no longer checks
+ f_f(sy), -- bah ... %s no longer checks
+ f_f(tx), -- bah ... %s no longer checks
+ f_f(ty), -- bah ... %s no longer checks
+ sxsy(wd,ht,dp))
+ end
+ if not trace_textexts then
+ object.path = false -- else: keep it
+ end
+ object.color = false
+ object.grouped = true
+ object.istext = true
+ end
+end
+
+-- graphics (we use the given index because pictures can be reused)
+
+
+local gt_reset, gt_process do
+
+ local graphics = { }
+
+
+ local mp_index = 0
+ local mp_str = ""
+
+ function mp.mf_graphic_text(index,str)
+ if not graphics[index] then
+ mp_index = index
+ mp_str = str
+ texrunlocal("mpgraphictexttoks")
+ end
+ end
+
+ interfaces.implement {
+ name = "mpgraphictexttoks",
+ actions = function()
+ context.MPLIBgraphictext(mp_index,mp_str)
+ end,
+ }
+
+end
+
+-- shades
+
+local function sh_process(object,prescript,before,after)
+ local sh_type = prescript.sh_type
+ if sh_type then
+ nofshades = nofshades + 1
+ local domain = lpegmatch(domainsplitter,prescript.sh_domain or "0 1")
+ local centera = lpegmatch(centersplitter,prescript.sh_center_a or "0 0")
+ local centerb = lpegmatch(centersplitter,prescript.sh_center_b or "0 0")
+ local transform = toboolean(prescript.sh_transform or "yes",true)
+ -- compensation for scaling
+ local sx = 1
+ local sy = 1
+ local sr = 1
+ local dx = 0
+ local dy = 0
+ if transform then
+ local first = lpegmatch(coordinatesplitter,prescript.sh_first or "0 0")
+ local setx = lpegmatch(coordinatesplitter,prescript.sh_set_x or "0 0")
+ local sety = lpegmatch(coordinatesplitter,prescript.sh_set_y or "0 0")
+
+ local x = setx[1] -- point that has different x
+ local y = sety[1] -- point that has different y
+
+ if x == 0 or y == 0 then
+ -- forget about it
+ else
+ local path = object.path
+ local path1x = path[1].x_coord
+ local path1y = path[1].y_coord
+ local path2x = path[x].x_coord
+ local path2y = path[y].y_coord
+
+ local dxa = path2x - path1x
+ local dya = path2y - path1y
+ local dxb = setx[2] - first[1]
+ local dyb = sety[2] - first[2]
+
+ if dxa == 0 or dya == 0 or dxb == 0 or dyb == 0 then
+ -- forget about it
+ else
+ sx = dxa / dxb ; if sx < 0 then sx = - sx end -- yes or no
+ sy = dya / dyb ; if sy < 0 then sy = - sy end -- yes or no
+
+ sr = sqrt(sx^2 + sy^2)
+
+ dx = path1x - sx*first[1]
+ dy = path1y - sy*first[2]
+ end
+ end
+ end
+
+ local steps = tonumber(prescript.sh_step) or 1
+ local sh_color_a = prescript.sh_color_a_1 or prescript.sh_color_a or "1"
+ local sh_color_b = prescript.sh_color_b_1 or prescript.sh_color_b or "1" -- sh_color_b_<sh_steps>
+ local ca, cb, colorspace, name, model, separation, fractions
+ if prescript.sh_color == "into" and prescript.sp_name then
+ -- some spotcolor
+ local value_a, components_a, fractions_a, name_a
+ local value_b, components_b, fractions_b, name_b
+ for i=1,#prescript do
+ -- { "sh_color_a", "1" },
+ -- { "sh_color", "into" },
+ -- { "sh_radius_b", "0" },
+ -- { "sh_radius_a", "141.73225" },
+ -- { "sh_center_b", "425.19676 141.73225" },
+ -- { "sh_center_a", "425.19676 0" },
+ -- { "sh_factor", "1" },
+ local tag = prescript[i][1]
+ if not name_a and tag == "sh_color_a" then
+ value_a = prescript[i-5][2]
+ components_a = prescript[i-4][2]
+ fractions_a = prescript[i-3][2]
+ name_a = prescript[i-2][2]
+ elseif not name_b and tag == "sh_color_b" then
+ value_b = prescript[i-5][2]
+ components_b = prescript[i-4][2]
+ fractions_b = prescript[i-3][2]
+ name_b = prescript[i-2][2]
+ end
+ if name_a and name_b then
+ break
+ end
+ end
+ ca, cb, separation, name = checkandconvertspot(
+ name_a,fractions_a,components_a,value_a,
+ name_b,fractions_b,components_b,value_b
+ )
+ else
+ local colora = lpegmatch(colorsplitter,sh_color_a)
+ local colorb = lpegmatch(colorsplitter,sh_color_b)
+ ca, cb, colorspace, name, model = checkandconvert(colora,colorb)
+ -- test:
+ if steps > 1 then
+ ca = { ca }
+ cb = { cb }
+ fractions = { tonumber(prescript[formatters["sh_fraction_%i"](1)]) or 0 }
+ for i=2,steps do
+ local colora = lpegmatch(colorsplitter,prescript[formatters["sh_color_a_%i"](i)])
+ local colorb = lpegmatch(colorsplitter,prescript[formatters["sh_color_b_%i"](i)])
+ ca[i], cb[i] = checkandconvert(colora,colorb,model)
+ fractions[i] = tonumber(prescript[formatters["sh_fraction_%i"](i)]) or (i/steps)
+ end
+ end
+ end
+ if not ca or not cb then
+ ca, cb, colorspace, name = checkandconvert()
+ steps = 1
+ end
+ if sh_type == "linear" then
+ local coordinates = { dx + sx*centera[1], dy + sy*centera[2], dx + sx*centerb[1], dy + sy*centerb[2] }
+ lpdf.linearshade(name,domain,ca,cb,1,colorspace,coordinates,separation,steps>1 and steps,fractions) -- backend specific (will be renamed)
+ elseif sh_type == "circular" then
+ local factor = tonumber(prescript.sh_factor) or 1
+ local radiusa = factor * tonumber(prescript.sh_radius_a)
+ local radiusb = factor * tonumber(prescript.sh_radius_b)
+ local coordinates = { dx + sx*centera[1], dy + sy*centera[2], sr*radiusa, dx + sx*centerb[1], dy + sy*centerb[2], sr*radiusb }
+ lpdf.circularshade(name,domain,ca,cb,1,colorspace,coordinates,separation,steps>1 and steps,fractions) -- backend specific (will be renamed)
+ else
+ -- fatal error
+ end
+ before[#before+1] = "q /Pattern cs"
+ after [#after+1] = formatters["W n /%s sh Q"](name)
+ -- false, not nil, else mt triggered
+ object.colored = false -- hm, not object.color ?
+ object.type = false
+ object.grouped = true
+ end
+end
+
+-- bitmaps
+
+local function bm_process(object,prescript,before,after)
+ local bm_xresolution = prescript.bm_xresolution
+ if bm_xresolution then
+ before[#before+1] = f_cm_b(cm(object))
+ before[#before+1] = function()
+ figures.bitmapimage {
+ xresolution = tonumber(bm_xresolution),
+ yresolution = tonumber(prescript.bm_yresolution),
+ width = 1/basepoints,
+ height = 1/basepoints,
+ data = object.postscript
+ }
+ end
+ before[#before+1] = s_cm_e
+ object.path = false
+ object.color = false
+ object.grouped = true
+ end
+end
+
+-- positions
+
+local function ps_process(object,prescript,before,after)
+ local ps_label = prescript.ps_label
+ if ps_label then
+ local op = object.path
+ local first = op[1]
+ local third = op[3]
+ local x = first.x_coord
+ local y = first.y_coord
+ local w = third.x_coord - x
+ local h = third.y_coord - y
+ local properties = metapost.properties
+ x = x - properties.llx
+ y = properties.ury - y
+ before[#before+1] = function()
+ context.MPLIBpositionwhd(ps_label,x,y,w,h)
+ end
+ object.path = false
+ end
+end
+
+-- figures
+
+-- local sx, rx, ry, sy, tx, ty = cm(object)
+-- sxsy(box.width,box.height,box.depth))
+
+function mp.mf_external_figure(filename)
+ local f = figures.getinfo(filename)
+ local w = 0
+ local h = 0
+ if f then
+ local u = f.used
+ if u and u.fullname then
+ w = u.width or 0
+ h = u.height or 0
+ end
+ else
+ report_metapost("external figure %a not found",filename)
+ end
+ mp.triplet(w/65536,h/65536,0)
+end
+
+local function fg_process(object,prescript,before,after)
+ local fg_name = prescript.fg_name
+ if fg_name then
+ before[#before+1] = f_cm_b(cm(object)) -- beware: does not use the cm stack
+ before[#before+1] = function()
+ context.MPLIBfigure(fg_name,prescript.fg_mask or "")
+ end
+ before[#before+1] = s_cm_e
+ object.path = false
+ object.grouped = true
+ end
+end
+
+-- color and transparency
+
+local value = Cs ( (
+ (Carg(1) * C((1-P(","))^1)) / function(a,b) return f_f3(a * tonumber(b)) end
+ + P(","))^1
+)
+
+-- should be codeinjections
+
+local t_list = attributes.list[attributes.private('transparency')]
+local c_list = attributes.list[attributes.private('color')]
+
+local remappers = {
+ [1] = formatters["s=%s"],
+ [3] = formatters["r=%s,g=%s,b=%s"],
+ [4] = formatters["c=%s,m=%s,y=%s,k=%s"],
+}
+
+local processlast = 0
+local processhash = setmetatableindex(function(t,k)
+ processlast = processlast + 1
+ local v = formatters["mp_%s"](processlast)
+ defineprocesscolor(v,k,true,true)
+ t[k] = v
+ return v
+end)
+
+local function checked_transparency(alternative,transparency,before,after)
+ alternative = tonumber(alternative) or 1
+ transparency = tonumber(transparency) or 0
+ before[#before+1] = formatters["/Tr%s gs"](registertransparency(nil,alternative,transparency,true))
+ after [#after +1] = "/Tr0 gs" -- outertransparency
+end
+
+local function tr_process(object,prescript,before,after)
+ -- before can be shortcut to t
+ local tr_alternative = prescript.tr_alternative
+ if tr_alternative then
+ checked_transparency(tr_alternative,prescript.tr_transparency,before,after)
+ end
+ local cs = object.color
+ if cs and #cs > 0 then
+ local c_b, c_a
+ local sp_type = prescript.sp_type
+ if not sp_type then
+ c_b, c_a = colorconverter(cs)
+ else
+ local sp_name = prescript.sp_name or "black"
+ if sp_type == "spot" then
+ local sp_value = prescript.sp_value or "1"
+ local components = split(sp_value,":")
+ local specification = remappers[#components]
+ if specification then
+ specification = specification(unpack(components))
+ else
+ specification = "s=0"
+ end
+ local sp_spec = processhash[specification]
+ definespotcolor(sp_name,sp_spec,"p=1",true)
+ sp_type = "named"
+ elseif sp_type == "multitone" then -- (fractions of a multitone) don't work well in mupdf
+ local sp_value = prescript.sp_value or "1"
+ local sp_specs = { }
+ local sp_list = split(sp_value," ")
+ for i=1,#sp_list do
+ local sp_value = sp_list[i]
+ local components = split(sp_value,":")
+ local specification = remappers[#components]
+ if specification then
+ specification = specification(unpack(components))
+ else
+ specification = "s=0"
+ end
+ local sp_spec = processhash[specification]
+ sp_specs[i] = formatters["%s=1"](sp_spec)
+ end
+ sp_specs = concat(sp_specs,",")
+ definemultitonecolor(sp_name,sp_specs,"","")
+ sp_type = "named"
+ end
+ if sp_type == "named" then
+ -- we might move this to another namespace .. also, named can be a spotcolor
+ -- so we need to check for that too ... also we need to resolve indirect
+ -- colors so we might need the second pass for this (draw dots with \MPcolor)
+ if not tr_alternative then
+ -- todo: sp_name is not yet registered at this time
+ local t = t_list[sp_name] -- string or attribute
+ local v = t and transparencyvalue(t)
+ if v then
+ checked_transparency(v[1],v[2],before,after)
+ end
+ end
+ local c = c_list[sp_name] -- string or attribute
+ local v = c and colorvalue(c)
+ if v then
+ -- all=1 gray=2 rgb=3 cmyk=4
+ local colorspace = v[1]
+ local factor = cs[1]
+ if colorspace == 2 then
+ local s = factor * v[2]
+ c_b, c_a = checked_color_pair(f_gray,s,s)
+ elseif colorspace == 3 then
+ local r = factor * v[3]
+ local g = factor * v[4]
+ local b = factor * v[5]
+ c_b, c_a = checked_color_pair(f_rgb,r,g,b,r,g,b)
+ elseif colorspace == 4 or colorspace == 1 then
+ local c = factor * v[6]
+ local m = factor * v[7]
+ local y = factor * v[8]
+ local k = factor * v[9]
+ c_b, c_a = checked_color_pair(f_cmyk,c,m,y,k,c,m,y,k)
+ elseif colorspace == 5 then
+ -- not all viewers show the fractions ok
+ local name = v[10]
+ local value = split(v[13],",")
+ if factor ~= 1 then
+ for i=1,#value do
+ value[i] = f_scn(factor * (tonumber(value[i]) or 1))
+ end
+ end
+ value = concat(value," ")
+ c_b, c_a = checked_color_pair(f_spot,name,name,value,value)
+ else
+ local s = factor *v[2]
+ c_b, c_a = checked_color_pair(f_gray,s,s)
+ end
+ end
+ end
+ end
+ if c_a and c_b then
+ before[#before+1] = c_b
+ after [#after +1] = c_a
+ end
+ end
+end
+
+-- layers (nasty: we need to keep the 'grouping' right
+
+local function la_process(object,prescript,before,after)
+ local la_name = prescript.la_name
+ if la_name then
+ before[#before+1] = backends.codeinjections.startlayer(la_name)
+ insert(after,1,backends.codeinjections.stoplayer())
+ end
+end
+
+-- groups
+
+local function gr_process(object,prescript,before,after)
+ local gr_state = prescript.gr_state
+ if not gr_state then
+ return
+ elseif gr_state == "start" then
+ local gr_type = utilities.parsers.settings_to_set(prescript.gr_type)
+ local path = object.path
+ local p1 = path[1]
+ local p2 = path[2]
+ local p3 = path[3]
+ local p4 = path[4]
+ local llx = min(p1.x_coord,p2.x_coord,p3.x_coord,p4.x_coord)
+ local lly = min(p1.y_coord,p2.y_coord,p3.y_coord,p4.y_coord)
+ local urx = max(p1.x_coord,p2.x_coord,p3.x_coord,p4.x_coord)
+ local ury = max(p1.y_coord,p2.y_coord,p3.y_coord,p4.y_coord)
+ before[#before+1] = function()
+ context.MPLIBstartgroup(
+ gr_type.isolated and 1 or 0,
+ gr_type.knockout and 1 or 0,
+ llx, lly, urx, ury
+ )
+ end
+ elseif gr_state == "stop" then
+ after[#after+1] = function()
+ context.MPLIBstopgroup()
+ end
+ end
+ object.path = false
+ object.color = false
+ object.grouped = true
+end
+
+-- outlines
+
+local ot_reset, ot_process do
+
+ local outlinetexts = { } -- also in top data
+
+ ot_reset = function ()
+ outlinetexts = { }
+ end
+
+ local mp_index = 0
+ local mp_kind = ""
+ local mp_str = ""
+
+ function mp.mf_outline_text(index,str,kind)
+ if not outlinetexts[index] then
+ mp_index = index
+ mp_kind = kind
+ mp_str = str
+ texrunlocal("mpoutlinetoks")
+ end
+ end
+
+ interfaces.implement {
+ name = "mpoutlinetoks",
+ actions = function()
+ context.MPLIBoutlinetext(mp_index,mp_kind,mp_str)
+ end,
+ }
+
+ implement {
+ name = "MPLIBconvertoutlinetext",
+ arguments = { "integer", "string", "integer" },
+ actions = function(index,kind,box)
+ local boxtomp = fonts.metapost.boxtomp
+ if boxtomp then
+ outlinetexts[index] = boxtomp(box,kind)
+ else
+ outlinetexts[index] = ""
+ end
+ end
+ }
+
+ function mp.mf_get_outline_text(index) -- maybe we need a more private namespace
+ mp.print(outlinetexts[index] or "draw origin;")
+ end
+
+end
+
+-- mf_object=<string>
+
+local p1 = P("mf_object=")
+local p2 = lpeg.patterns.eol * p1
+local pattern = (1-p2)^0 * p2 + p1
+
+function metapost.isobject(str)
+ return pattern and str ~= "" and lpegmatch(p,str) and true or false
+end
+
+local function installplugin(specification)
+ local reset = specification.reset
+ local process = specification.process
+ local object = specification.object
+ if reset then
+ appendaction(resetteractions,"system",reset)
+ end
+ if process then
+ appendaction(processoractions,"system",process)
+ end
+end
+
+metapost.installplugin = installplugin
+
+-- definitions
+
+installplugin { name = "outline", reset = ot_reset, process = ot_process }
+installplugin { name = "color", reset = cl_reset, process = cl_process }
+installplugin { name = "text", reset = tx_reset, process = tx_process }
+installplugin { name = "group", reset = gr_reset, process = gr_process }
+installplugin { name = "graphictext", reset = gt_reset, process = gt_process }
+installplugin { name = "shade", reset = sh_reset, process = sh_process }
+installplugin { name = "bitmap", reset = bm_reset, process = bm_process }
+installplugin { name = "box", reset = bx_reset, process = bx_process }
+installplugin { name = "position", reset = ps_reset, process = ps_process }
+installplugin { name = "figure", reset = fg_reset, process = fg_process }
+installplugin { name = "layer", reset = la_reset, process = la_process }
+installplugin { name = "transparency", reset = tr_reset, process = tr_process }