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|
if not modules then modules = { } end modules ['mlib-pps'] = { -- prescript, postscripts and specials
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",
}
-- current limitation: if we have textext as well as a special color then due to
-- prescript/postscript overload we can have problems
local format, gmatch, concat, round, match = string.format, string.gmatch, table.concat, math.round, string.match
local sprint = tex.sprint
local tonumber, type = tonumber, type
local starttiming, stoptiming = statistics.starttiming, statistics.stoptiming
local ctxcatcodes = tex.ctxcatcodes
local trace_textexts = false trackers.register("metapost.textexts", function(v) trace_textexts = v end)
colors = colors or { }
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
metapost = metapost or { }
metapost.specials = metapost.specials or { }
metapost.specials.data = metapost.specials.data or { }
metapost.externals = metapost.externals or { n = 0 }
local data = metapost.specials.data
local colordata = { {}, {}, {}, {}, {} }
--~ (r,g,b) => cmyk : r=123 g= 1 b=hash
--~ => spot : r=123 g= 2 b=hash
--~ => transparent rgb : r=123 g= 3 b=hash
--~ => transparent cmyk : r=123 g= 4 b=hash
--~ => transparent spot : r=123 g= 5 b=hash
--~ => rest : r=123 g=n>10 b=whatever
local nooutercolor = "0 g 0 G"
local nooutertransparency = "/Tr0 gs" -- only when set
local outercolormode = 0
local outercolor = nooutercolor
local outertransparency = nooutertransparency
local innercolor = nooutercolor
local innertransparency = nooutertransparency
local pdfcolor, pdftransparency = lpdf.color, lpdf.transparency
local registercolor, registerspotcolor = colors.register, colors.registerspotcolor
local registertransparency = transparencies.register
function metapost.set_outer_color(mode,colormodel,colorattribute,transparencyattribute)
-- has always to be called before conversion
-- todo: transparency (not in the mood now)
outercolormode = mode
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
local function checked_color_pair(color)
if not color then
return innercolor, outercolor
elseif outercolormode == 3 then
innercolor = color
return innercolor, innercolor
else
return color, outercolor
end
end
metapost.checked_color_pair = checked_color_pair
function metapost.colorinitializer()
innercolor = outercolor
innertransparency = outertransparency
return outercolor, outertransparency
end
function metapost.specials.register(str) -- only colors
local size, content, n, class = match(str,"^%%%%MetaPostSpecial: (%d+) (.*) (%d+) (%d+)$")
if class then
-- use lpeg splitter
local data = { }
for s in gmatch(content,"[^ ]+") do
data[#data+1] = s
end
class, n = tonumber(class), tonumber(n)
if class == 3 or class == 4 or class == 5 then
-- hm, weird
else
n = tonumber(data[1])
end
if n then
local cc = colordata[class]
if cc then
cc[n] = data
else
logs.report("mplib","problematic special: %s (no colordata class %s)", str or "?",class)
end
else
-- there is some bug to be solved, so we issue a message
logs.report("mplib","problematic special: %s", str or "?")
end
end
--~ if str:match("^%%%%MetaPostOption: multipass") then
--~ metapost.multipass = true
--~ end
end
local function spotcolorconverter(parent, n, d, p)
registerspotcolor(parent)
return pdfcolor(colors.model,registercolor(nil,'spot',parent,n,d,p))
end
function metapost.colorhandler(cs, object, result, colorconverter) -- handles specials
local cr = outercolor
local what = round(cs[2]*10000)
local data = colordata[what]
if data then
data = data[round(cs[3]*10000)]
end
if not data then
--
elseif what == 1 then
result[#result+1], cr = colorconverter({ data[2], data[3], data[4], data[5] })
elseif what == 2 then
result[#result+1] = spotcolorconverter(data[2],data[3],data[4],data[5])
else
if what == 3 then
result[#result+1], cr = colorconverter({ data[3], data[4], data[5]})
elseif what == 4 then
result[#result+1], cr = colorconverter({ data[3], data[4], data[5], data[6]})
elseif what == 5 then
result[#result+1] = spotcolorconverter(data[3],data[4],data[5],data[6])
end
object.prescript = "tr"
object.postscript = data[1] .. "," .. data[2]
end
object.color = nil
return object, cr
end
function metapost.colorspec(cs) -- used for shades ... returns table (for checking) or string (spot)
local what = round(cs[2]*10000)
local data = colordata[what][round(cs[3]*10000)]
if not data then
return { 0 }
elseif what == 1 then
return { tonumber(data[2]), tonumber(data[3]), tonumber(data[4]), tonumber(data[5]) }
elseif what == 2 then
return spotcolorconverter(data[2],data[3],data[4],data[5])
elseif what == 3 then
return { tonumber(data[3]), tonumber(data[4]), tonumber(data[5]) }
elseif what == 4 then
return { tonumber(data[3]), tonumber(data[4]), tonumber(data[5]), tonumber(data[6]) }
elseif what == 5 then
return spotcolorconverter(data[3],data[4],data[5],data[6])
end
end
function metapost.specials.tr(specification,object,result)
local a, t = match(specification,"^(.+),(.+)$")
local before = a and t and function()
result[#result+1] = format("/Tr%s gs",registertransparency(nil,a,t,true)) -- maybe nil instead of 'mp'
return object, result
end
local after = before and function()
result[#result+1] = outertransparency -- here we could revert to the outer color
return object, result
end
return object, before, nil, after
end
local specificationsplitter = lpeg.Ct(lpeg.splitat(" "))
local colorsplitter = lpeg.Ct(lpeg.splitat(":"))
local colorsplitter = lpeg.Ct(lpeg.splitter(":",tonumber))
-- Unfortunately we cannot use cmyk colors natively because there is no
-- generic color allocation primitive ... it's just an rgbcolor color.. This
-- means that we cannot pass colors in either cmyk or rgb form.
--
-- def cmyk(expr c,m,y,k) =
-- 1 withprescript "cc" withpostscript ddddecimal (c,m,y,k)
-- enddef ;
--
-- This is also an example of a simple plugin.
--~ function metapost.specials.cc(specification,object,result)
--~ object.color = specificationsplitter:match(specification)
--~ return object, nil, nil, nil
--~ end
--~ function metapost.specials.cc(specification,object,result)
--~ local c = specificationsplitter:match(specification)
--~ local o = object.color[1]
--~ c[1],c[2],c[3],c[4] = o*c[1],o*c[2],o*c[3],o*c[4]
--~ return object, nil, nil, nil
--~ end
-- thanks to taco's reading of the postscript manual:
--
-- x' = sx * x + ry * y + tx
-- y' = rx * x + sy * y + ty
function metapost.specials.fg(specification,object,result,flusher) -- graphics
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, fourth.y_coord - ty
local rx, ry = second.y_coord - ty, fourth.x_coord - tx
if sx == 0 then sx = 0.00001 end
if sy == 0 then sy = 0.00001 end
local before = specification and function()
flusher.flushfigure(result)
sprint(ctxcatcodes,format("\\MPLIBfigure{%f}{%f}{%f}{%f}{%f}{%f}{%s}",sx,rx,ry,sy,tx,ty,specification))
object.path = nil
return object, { }
end
return { } , before, nil, nil -- replace { } by object for tracing
end
function metapost.specials.ps(specification,object,result) -- positions
local op = object.path
local first, third = op[1], op[3]
local x, y = first.x_coord, first.y_coord
local w, h = third.x_coord - x, third.y_coord - y
local label = specification
x = x - metapost.llx
y = metapost.ury - y
-- logs.report("mplib", "todo: position '%s' at (%s,%s) with (%s,%s)",label,x,y,w,h)
sprint(ctxcatcodes,format("\\dosavepositionwhd{%s}{0}{%sbp}{%sbp}{%sbp}{%sbp}{0pt}",label,x,y,w,h))
return { }, nil, nil, nil
end
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
-- todo: check for the same colorspace (actually a backend issue), now we can
-- have several similar resources
--
-- normalize(ca,cb) fails for spotcolors
function metapost.specials.cs(specification,object,result,flusher) -- spot colors?
-- a mess, not dynamic anyway
nofshades = nofshades + 1
flusher.flushfigure(result)
result = { }
local t = specificationsplitter:match(specification)
-- we need a way to move/scale
local ca = colorsplitter:match(t[4])
local cb = colorsplitter:match(t[8])
if round(ca[1]*10000) == 123 then ca = metapost.colorspec(ca) end
if round(cb[1]*10000) == 123 then cb = metapost.colorspec(cb) end
local name = format("MplSh%s",nofshades)
local domain = { tonumber(t[1]), tonumber(t[2]) }
local coordinates = { tonumber(t[5]), tonumber(t[6]), tonumber(t[7]), tonumber(t[9]), tonumber(t[10]), tonumber(t[11]) }
if type(ca) == "string" then
-- backend specific (will be renamed)
lpdf.circularshade(name,domain,{ 0 },{ 1 },1,"DeviceGray",coordinates)
else
if #ca > #cb then
normalize(ca,cb)
elseif #ca < #cb then
normalize(cb,ca)
end
local model = colors.model
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[1], ca[2], ca[3] = cmyktorgb(ca[1],ca[2],ca[3],ca[4])
cb[1], cb[2], cb[3] = cmyktorgb(cb[1],cb[2],cb[3],cb[4])
ca[4], cb[4] = nil, nil
elseif #ca == 1 then
local a, b = 1-ca[1], 1-cb[1]
ca[1], ca[2], ca[3] = a, a, a
cb[1], cb[2], cb[3] = b, b, b
end
-- backend specific (will be renamed)
lpdf.circularshade(name,domain,ca,cb,1,"DeviceRGB",coordinates)
elseif model == "cmyk" then
if #ca == 3 then
ca[1], ca[2], ca[3], ca[4] = rgbtocmyk(ca[1],ca[2],ca[3])
cb[1], cb[2], cb[3], ca[4] = rgbtocmyk(cb[1],cb[2],cb[3])
elseif #ca == 1 then
ca[1], ca[2], ca[3], ca[4] = 0, 0, 0, ca[1]
cb[1], cb[2], cb[3], ca[4] = 0, 0, 0, ca[1]
end
-- backend specific (will be renamed)
lpdf.circularshade(name,domain,ca,cb,1,"DeviceCMYK",coordinates)
else
if #ca == 4 then
ca[1] = cmyktogray(ca[1],ca[2],ca[3],ca[4])
cb[1] = cmyktogray(cb[1],cb[2],cb[3],cb[4])
elseif #ca == 3 then
ca[1] = rgbtogray(ca[1],ca[2],ca[3])
cb[1] = rgbtogray(cb[1],cb[2],cb[3])
end
-- backend specific (will be renamed)
lpdf.circularshade(name,domain,ca,cb,1,"DeviceGRAY",coordinates)
end
end
local before = function()
result[#result+1] = "q /Pattern cs"
return object, result
end
local after = function()
result[#result+1] = format("W n /%s sh Q", name)
return object, result
end
object.color, object.type = nil, nil
return object, before, nil, after
end
function metapost.specials.ls(specification,object,result,flusher)
nofshades = nofshades + 1
flusher.flushfigure(result)
result = { }
local t = specificationsplitter:match(specification)
-- we need a way to move/scale
local ca = colorsplitter:match(t[4])
local cb = colorsplitter:match(t[7])
if round(ca[1]*10000) == 123 then ca = metapost.colorspec(ca) end
if round(cb[1]*10000) == 123 then cb = metapost.colorspec(cb) end
local name = format("MpSh%s",nofshades)
local domain = { tonumber(t[1]), tonumber(t[2]) }
local coordinates = { tonumber(t[5]), tonumber(t[6]), tonumber(t[8]), tonumber(t[9]) }
if type(ca) == "string" then
-- backend specific (will be renamed)
lpdf.linearshade(name,domain,{ 0 },{ 1 },1,"DeviceGray",coordinates)
else
if #ca > #cb then
normalize(ca,cb)
elseif #ca < #cb then
normalize(cb,ca)
end
local model = colors.model
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[1], ca[2], ca[3] = cmyktorgb(ca[1],ca[2],ca[3],ca[4])
cb[1], cb[2], cb[3] = cmyktorgb(cb[1],cb[2],cb[3],cb[4])
elseif #ca == 1 then
local a, b = 1-ca[1], 1-cb[1]
ca[1], ca[2], ca[3] = a, a, a
cb[1], cb[2], cb[3] = b, b, b
end
-- backend specific (will be renamed)
lpdf.linearshade(name,domain,ca,cb,1,"DeviceRGB",coordinates)
elseif model == "cmyk" then
if #ca == 3 then
ca[1], ca[2], ca[3], ca[4] = rgbtocmyk(ca[1],ca[2],ca[3])
cb[1], cb[2], cb[3], ca[4] = rgbtocmyk(cb[1],cb[2],cb[3])
elseif #ca == 1 then
ca[1], ca[2], ca[3], ca[4] = 0, 0, 0, ca[1]
cb[1], cb[2], cb[3], ca[4] = 0, 0, 0, ca[1]
end
-- backend specific (will be renamed)
lpdf.linearshade(name,domain,ca,cb,1,"DeviceCMYK",coordinates)
else
if #ca == 4 then
ca[1] = cmyktogray(ca[1],ca[2],ca[3],ca[4])
cb[1] = cmyktogray(cb[1],cb[2],cb[3],cb[4])
elseif #ca == 3 then
ca[1] = rgbtogray(ca[1],ca[2],ca[3])
cb[1] = rgbtogray(cb[1],cb[2],cb[3])
end
-- backend specific (will be renamed)
lpdf.linearshade(name,domain,ca,cb,1,"DeviceGRAY",coordinates)
end
end
local before = function()
result[#result+1] = "q /Pattern cs"
return object, result
end
local after = function()
result[#result+1] = format("W n /%s sh Q", name)
return object, result
end
object.color, object.type = nil, nil
return object, before, nil, after
end
-- no need for a before here
local current_format, current_graphic
metapost.first_box = metapost.first_box or 1000
metapost.last_box = metapost.last_box or 1100
metapost.textext_current = metapost.first_box
metapost.multipass = false
function metapost.free_boxes()
local tb = tex.box
for i = metapost.first_box,metapost.last_box do
local b = tb[i]
if b then
tb[i] = nil -- no node.flush_list(b) needed, else double free error
else
break
end
end
end
function metapost.specials.tf(specification,object)
--~ print("setting", metapost.textext_current)
local n, str = match(specification,"^(%d+):(.+)$")
if n and str then
if metapost.textext_current < metapost.last_box then
metapost.textext_current = metapost.first_box + n - 1
end
if trace_textexts then
logs.report("metapost","first pass: order %s, box %s",n,metapost.textext_current)
end
sprint(ctxcatcodes,format("\\MPLIBsettext{%s}{%s}",metapost.textext_current,str))
metapost.multipass = true
end
return { }, nil, nil, nil
end
function metapost.specials.ts(specification,object,result,flusher)
-- print("getting", metapost.textext_current)
local n, str = match(specification,"^(%d+):(.+)$")
if n and str then
if trace_textexts then
logs.report("metapost","second pass: order %s, box %s",n,metapost.textext_current)
end
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, fourth.y_coord - ty
local rx, ry = second.y_coord - ty, fourth.x_coord - tx
if sx == 0 then sx = 0.00001 end
if sy == 0 then sy = 0.00001 end
if not trace_textexts then
object.path = nil
end
local before = function() -- no need for function
--~ flusher.flushfigure(result)
--~ sprint(ctxcatcodes,format("\\MPLIBgettext{%f}{%f}{%f}{%f}{%f}{%f}{%s}",sx,rx,ry,sy,tx,ty,metapost.textext_current))
--~ result = { }
result[#result+1] = format("q %f %f %f %f %f %f cm", sx,rx,ry,sy,tx,ty)
flusher.flushfigure(result)
if metapost.textext_current < metapost.last_box then
metapost.textext_current = metapost.first_box + n - 1
end
local b = metapost.textext_current
sprint(ctxcatcodes,format("\\MPLIBgettextscaled{%s}{%s}{%s}",b, metapost.sxsy(tex.wd[b],tex.ht[b],tex.dp[b])))
result = { "Q" }
return object, result
end
return { }, before, nil, nil -- replace { } by object for tracing
else
return { }, nil, nil, nil -- replace { } by object for tracing
end
end
-- 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(format("%.3f g %.3f G",s,s))
elseif n == 3 then
local r, g, b = cr[1], cr[2], cr[3]
if r == g and g == b then
return checked_color_pair(format("%.3f g %.3f G",r,r))
else
return checked_color_pair(format("%.3f %.3f %.3f rg %.3f %.3f %.3f RG",r,g,b,r,g,b))
end
else
local c, m, y, k = cr[1], cr[2], cr[3], cr[4]
if c == m and m == y and y == 0 then
k = 1 - k
return checked_color_pair(format("%.3f g %.3f G",k,k))
else
return checked_color_pair(format("%.3f %.3f %.3f %.3f k %.3f %.3f %.3f %.3f K",c,m,y,k,c,m,y,k))
end
end
elseif n == 1 then
local s = cr[1]
return checked_color_pair(format("%.3f g %.3f G",s,s))
elseif n == 3 then
local r, g, b = cr[1], cr[2], cr[3]
return checked_color_pair(format("%.3f %.3f %.3f rg %.3f %.3f %.3f RG",r,g,b,r,g,b))
else
local c, m, y, k = cr[1], cr[2], cr[3], cr[4]
return checked_color_pair(format("%.3f %.3f %.3f %.3f k %.3f %.3f %.3f %.3f K",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(format("%.3f g %.3f G",s,s))
elseif n == 3 then
local r, g, b = cr[1], cr[2], cr[3]
if r == g and g == b then
return checked_color_pair(format("%.3f g %.3f G",r,r))
else
return checked_color_pair(format("%.3f %.3f %.3f rg %.3f %.3f %.3f RG",r,g,b,r,g,b))
end
else
local c, m, y, k = cr[1], cr[2], cr[3], cr[4]
if c == m and m == y and y == 0 then
k = 1 - k
return checked_color_pair(format("%.3f g %.3f G",k,k))
else
local r, g, b = cmyktorgb(c,m,y,k)
return checked_color_pair(format("%.3f %.3f %.3f rg %.3f %.3f %.3f RG",r,g,b,r,g,b))
end
end
elseif n == 1 then
local s = cr[1]
return checked_color_pair(format("%.3f g %.3f G",s,s))
else
local r, g, b
if n == 3 then
r, g, b = cmyktorgb(cr[1],cr[2],cr[3],cr[4])
else
r, g, b = cr[1], cr[2], cr[3]
end
return checked_color_pair(format("%.3f %.3f %.3f rg %.3f %.3f %.3f RG",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(format("%.3f g %.3f G",s,s))
elseif n == 3 then
local r, g, b = cr[1], cr[2], cr[3]
if r == g and g == b then
return checked_color_pair(format("%.3f g %.3f G",r,r))
else
local c, m, y, k = rgbtocmyk(r,g,b)
return checked_color_pair(format("%.3f %.3f %.3f %.3f k %.3f %.3f %.3f %.3f K",c,m,y,k,c,m,y,k))
end
else
local c, m, y, k = cr[1], cr[2], cr[3], cr[4]
if c == m and m == y and y == 0 then
k = 1 - k
return checked_color_pair(format("%.3f g %.3f G",k,k))
else
return checked_color_pair(format("%.3f %.3f %.3f %.3f k %.3f %.3f %.3f %.3f K",c,m,y,k,c,m,y,k))
end
end
elseif n == 1 then
local s = cr[1]
return checked_color_pair(format("%.3f g %.3f G",s,s))
else
local c, m, y, k
if n == 3 then
c, m, y, k = rgbtocmyk(cr[1],cr[2],cr[3])
else
c, m, y, k = cr[1], cr[2], cr[3], cr[4]
end
return checked_color_pair(format("%.3f %.3f %.3f %.3f k %.3f %.3f %.3f %.3f K",c,m,y,k,c,m,y,k))
end
end
function models.gray(cr)
local n, s = #cr, 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(format("%.3f g %.3f G",s,s))
end
function metapost.colorconverter()
return models[colors.model] or gray
end
do
local P, S, V, Cs = lpeg.P, lpeg.S, lpeg.V, lpeg.Cs
local btex = P("btex")
local etex = P(" etex")
local vtex = P("verbatimtex")
local ttex = P("textext")
local gtex = P("graphictext")
local multipass = P("forcemultipass")
local spacing = S(" \n\r\t\v")^0
local dquote = P('"')
local found, forced = false, false
local function convert(str)
found = true
return "textext(\"" .. str .. "\")"
end
local function ditto(str)
return "\" & ditto & \""
end
local function register()
found = true
end
local function force()
forced = true
end
local parser = P {
[1] = Cs((V(2)/register + V(3)/convert + V(4)/force + 1)^0),
[2] = ttex + gtex,
[3] = (btex + vtex) * spacing * Cs((dquote/ditto + (1 - etex))^0) * etex,
[4] = multipass, -- experimental, only for testing
}
-- currently a a one-liner produces less code
local parser = Cs(((ttex + gtex)/register + ((btex + vtex) * spacing * Cs((dquote/ditto + (1 - etex))^0) * etex)/convert + 1)^0)
function metapost.check_texts(str)
found, forced = false, false
return parser:match(str), found, forced
end
end
local factor = 65536*(7227/7200)
function metapost.edefsxsy(wd,ht,dp) -- helper for figure
local hd = ht + dp
commands.edef("sx",(wd ~= 0 and factor/wd) or 0)
commands.edef("sy",(hd ~= 0 and factor/hd) or 0)
end
function metapost.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
function metapost.text_texts_data()
local t, n = { }, 0
for i = metapost.first_box, metapost.last_box do
n = n + 1
if trace_textexts then
logs.report("metapost","passed data: order %s, box %s",n,i)
end
if tex.box[i] then
t[#t+1] = format("_tt_w_[%i]:=%f;_tt_h_[%i]:=%f;_tt_d_[%i]:=%f;", n,tex.wd[i]/factor, n,tex.ht[i]/factor, n,tex.dp[i]/factor)
else
break
end
end
return t
end
metapost.intermediate = metapost.intermediate or {}
metapost.intermediate.actions = metapost.intermediate.actions or {}
metapost.intermediate.needed = false
metapost.method = 1 -- 1:dumb 2:clever
function metapost.graphic_base_pass(mpsformat,str,preamble,askedfig)
local nofig = (askedfig and "") or false
local done_1, done_2, forced_1, forced_2
str, done_1, forced_1 = metapost.check_texts(str)
if preamble then
preamble, done_2, forced_2 = metapost.check_texts(preamble)
else
preamble, done_2, forced_2 = "", false, false
end
metapost.textext_current = metapost.first_box
metapost.intermediate.needed = false
metapost.multipass = false -- no needed here
current_format, current_graphic = mpsformat, str
if metapost.method == 1 or (metapost.method == 2 and (done_1 or done_2)) then
-- first true means: trialrun, second true means: avoid extra run if no multipass
local flushed = metapost.process(mpsformat, {
preamble,
nofig or "beginfig(1); ",
"if unknown _trial_run_ : boolean _trial_run_ fi ; _trial_run_ := true ;",
str,
nofig or "endfig ;"
-- }, true, nil, true )
}, true, nil, not (forced_1 or forced_2), false, askedfig)
if metapost.intermediate.needed then
for _, action in pairs(metapost.intermediate.actions) do
action()
end
end
if not flushed or not metapost.optimize then
-- tricky, we can only ask once for objects and therefore
-- we really need a second run when not optimized
sprint(ctxcatcodes,format("\\ctxlua{metapost.graphic_extra_pass(%s)}",askedfig or "false"))
end
else
metapost.process(mpsformat, {
preamble or "",
nofig or "beginfig(1); ",
"_trial_run_ := false ;",
str,
nofig or "endfig ;"
}, false, nil, false, false, askedfig )
end
-- here we could free the textext boxes
metapost.free_boxes()
end
function metapost.graphic_extra_pass(askedfig)
local nofig = (askedfig and "") or false
metapost.textext_current = metapost.first_box
metapost.process(current_format, {
nofig or "beginfig(1); ",
"_trial_run_ := false ;",
concat(metapost.text_texts_data()," ;\n"),
current_graphic,
nofig or "endfig ;"
}, false, nil, false, true, askedfig )
end
function metapost.getclippath(data)
local mpx = metapost.format("metafun")
if mpx and data then
starttiming(metapost)
starttiming(metapost.exectime)
local result = mpx:execute(format("beginfig(1);%s;endfig;",data))
stoptiming(metapost.exectime)
if result.status > 0 then
print("error", result.status, result.error or result.term or result.log)
result = ""
else
result = metapost.filterclippath(result)
end
stoptiming(metapost)
sprint(result)
end
end
metapost.tex = metapost.tex or { }
do -- only used in graphictexts
local environments = { }
function metapost.tex.set(str)
environments[#environments+1] = str
end
function metapost.tex.reset()
environments = { }
end
function metapost.tex.get()
return concat(environments,"\n")
end
end
local graphics = { }
local start = [[\starttext]]
local preamble = [[\long\def\MPLIBgraphictext#1{\startTEXpage[scale=10000]#1\stopTEXpage}]]
local stop = [[\stoptext]]
function metapost.specials.gt(specification,object) -- number, so that we can reorder
graphics[#graphics+1] = format("\\MPLIBgraphictext{%s}",specification)
metapost.intermediate.needed = true
metapost.multipass = true
return { }, nil, nil, nil
end
function metapost.intermediate.actions.makempy()
if #graphics > 0 then
local externals = metapost.externals
externals.n = externals.n + 1
starttiming(externals)
local mpofile = tex.jobname .. "-mpgraph"
local mpyfile = file.replacesuffix(mpofile,"mpy")
local pdffile = file.replacesuffix(mpofile,"pdf")
local texfile = file.replacesuffix(mpofile,"tex")
io.savedata(texfile, { start, preamble, metapost.tex.get(), concat(graphics,"\n"), stop }, "\n")
local command = format("context --once %s %s", (tex.interactionmode == 0 and "--batchmode") or "", texfile)
os.execute(command)
if io.exists(pdffile) then
command = format("pstoedit -ssp -dt -f mpost %s %s", pdffile, mpyfile)
os.execute(command)
local result = { }
if io.exists(mpyfile) then
local data = io.loaddata(mpyfile)
for figure in gmatch(data,"beginfig(.-)endfig") do
result[#result+1] = format("begingraphictextfig%sendgraphictextfig ;\n", figure)
end
io.savedata(mpyfile,concat(result,""))
end
end
stoptiming(externals)
graphics = { } -- ?
end
end
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