if not modules then modules = { } end modules ['colo-ini'] = {
version = 1.000,
comment = "companion to colo-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local type, tonumber, tostring = type, tonumber, tostring
local concat, insert, remove = table.concat, table.insert, table.remove
local format, gmatch, gsub, lower, match, find = string.format, string.gmatch, string.gsub, string.lower, string.match, string.find
local P, R, C, Cc = lpeg.P, lpeg.R, lpeg.C, lpeg.Cc
local lpegmatch, lpegpatterns = lpeg.match, lpeg.patterns
local formatters = string.formatters
local trace_define = false trackers.register("colors.define",function(v) trace_define = v end)
local trace_pgf = false trackers.register("colors.pgf", function(v) trace_pgf = v end)
local report_colors = logs.reporter("colors","defining")
local report_pgf = logs.reporter("colors","pgf")
local attributes = attributes
local backends = backends
local storage = storage
local context = context
local commands = commands
local implement = interfaces.implement
local getnamespace = interfaces.getnamespace
local mark = utilities.storage.mark
local settings_to_hash_strict = utilities.parsers.settings_to_hash_strict
local colors = attributes.colors
local transparencies = attributes.transparencies
local colorintents = attributes.colorintents
local registrations = backends.registrations
local v_reset = interfaces.variables.reset
local texsetattribute = tex.setattribute
local texgetattribute = tex.getattribute
local texgetcount = tex.getcount
local texgettoks = tex.gettoks
local texgetmacro = tokens.getters.macro
local a_color = attributes.private('color')
local a_transparency = attributes.private('transparency')
local a_colormodel = attributes.private('colormodel')
local register_color = colors.register
local attributes_list = attributes.list
local colorvalues = colors.values
local transparencyvalues = transparencies.values
colors.sets = mark(colors.sets or { }) -- sets are mostly used for
local colorsets = colors.sets -- showing lists of defined
local colorset = { } -- colors
colorsets.default = colorset
local valid = mark(colors.valid or { })
colors.valid = valid
local counts = mark(colors.counts or { })
colors.counts = counts
storage.register("attributes/colors/sets", colorsets, "attributes.colors.sets")
storage.register("attributes/colors/valid", valid, "attributes.colors.valid")
storage.register("attributes/colors/counts", counts, "attributes.colors.counts")
local function currentmodel()
return texgetattribute(a_colormodel)
end
colors.currentmodel = currentmodel
local function synccolor(name)
valid[name] = true
end
local function synccolorclone(name,clone)
valid[name] = clone
end
local function synccolorcount(name,n)
counts[name] = n
end
local stack = { }
local function pushset(name)
insert(stack,colorset)
colorset = colorsets[name]
if not colorset then
colorset = { }
colorsets[name] = colorset
end
end
local function popset()
colorset = remove(stack)
end
local function setlist(name)
return table.sortedkeys(name and name ~= "" and colorsets[name] or colorsets.default or {})
end
colors.pushset = pushset
colors.popset = popset
colors.setlist = setlist
-- todo: set at the lua end
local ctx_colordefagc = context.colordefagc
local ctx_colordefagt = context.colordefagt
local ctx_colordefalc = context.colordefalc
local ctx_colordefalt = context.colordefalt
local ctx_colordeffgc = context.colordeffgc
local ctx_colordeffgt = context.colordeffgt
local ctx_colordefflc = context.colordefflc
local ctx_colordefflt = context.colordefflt
local ctx_colordefrgc = context.colordefrgc
local ctx_colordefrgt = context.colordefrgt
local ctx_colordefrlc = context.colordefrlc
local ctx_colordefrlt = context.colordefrlt
local function definecolor(name, ca, global)
if ca and ca > 0 then
if global then
if trace_define then
report_colors("define global color %a with attribute %a",name,ca)
end
ctx_colordefagc(name,ca)
else
if trace_define then
report_colors("define local color %a with attribute %a",name,ca)
end
ctx_colordefalc(name,ca)
end
else
if global then
ctx_colordefrgc(name)
else
ctx_colordefrlc(name)
end
end
colorset[name] = true-- maybe we can store more
end
local function inheritcolor(name, ca, global)
if ca and ca ~= "" then
if global then
if trace_define then
report_colors("inherit global color %a with attribute %a",name,ca)
end
ctx_colordeffgc(name,ca) -- some day we will set the macro directly
else
if trace_define then
report_colors("inherit local color %a with attribute %a",name,ca)
end
ctx_colordefflc(name,ca)
end
else
if global then
ctx_colordefrgc(name)
else
ctx_colordefrlc(name)
end
end
colorset[name] = true-- maybe we can store more
end
local function definetransparent(name, ta, global)
if ta and ta > 0 then
if global then
if trace_define then
report_colors("define global transparency %a with attribute %a",name,ta)
end
ctx_colordefagt(name,ta)
else
if trace_define then
report_colors("define local transparency %a with attribute %a",name,ta)
end
ctx_colordefalt(name,ta)
end
else
if global then
ctx_colordefrgt(name)
else
ctx_colordefrlt(name)
end
end
end
local function inherittransparent(name, ta, global)
if ta and ta ~= "" then
if global then
if trace_define then
report_colors("inherit global transparency %a with attribute %a",name,ta)
end
ctx_colordeffgt(name,ta)
else
if trace_define then
report_colors("inherit local transparency %a with attribute %a",name,ta)
end
ctx_colordefflt(name,ta)
end
else
if global then
ctx_colordefrgt(name)
else
ctx_colordefrlt(name)
end
end
end
local transparent = {
none = 0,
normal = 1,
multiply = 2,
screen = 3,
overlay = 4,
softlight = 5,
hardlight = 6,
colordodge = 7,
colorburn = 8,
darken = 9,
lighten = 10,
difference = 11,
exclusion = 12,
hue = 13,
saturation = 14,
color = 15,
luminosity = 16,
}
transparencies.names = transparent
local gray_okay = true
local rgb_okay = true
local cmyk_okay = true
local spot_okay = true
local multi_okay = true
local forced = false
function colors.forcesupport(gray,rgb,cmyk,spot,multi) -- pdfx driven
gray_okay, rgb_okay, cmyk_okay, spot_okay, multi_okay, forced = gray, rgb, cmyk, spot, multi, true
report_colors("supported models: gray %a, rgb %a, cmyk %a, spot %a",gray,rgb,cmyk,spot)
end
local function forcedmodel(model) -- delayed till the backend but mp directly
if not forced then
return model
elseif model == 2 then -- gray
if gray_okay then
-- okay
elseif cmyk_okay then
return 4
elseif rgb_okay then
return 3
end
elseif model == 3 then -- rgb
if rgb_okay then
-- okay
elseif cmyk_okay then
return 4
elseif gray_okay then
return 2
end
elseif model == 4 then -- cmyk
if cmyk_okay then
-- okay
elseif rgb_okay then
return 3
elseif gray_okay then
return 2
end
elseif model == 5 then -- spot
if spot_okay then
return 5
elseif cmyk_okay then
return 4
elseif rgb_okay then
return 3
elseif gray_okay then
return 2
end
end
return model
end
colors.forcedmodel = forcedmodel
-- By coupling we are downward compatible. When we decouple we need to do more tricky
-- housekeeping (e.g. persist color independent transparencies when color bound ones
-- are nil.)
colors.couple = true
local function definetransparency(name,n,global)
if n == v_reset then
definetransparent(name, 0, global) -- or attributes.unsetvalue
return
end
local a = tonumber(n)
if a then
transparent[name] = a -- 0 .. 16
return
end
local a = transparent[name]
if a then
transparent[name] = a
return
end
local settings = settings_to_hash_strict(n)
if settings then
local a = settings.a
local t = settings.t
if a and t then
definetransparent(name, transparencies.register(name,transparent[a] or tonumber(a) or 1,tonumber(t) or 1), global)
else
definetransparent(name, 0, global)
end
else
inherittransparent(name, n, global)
end
end
colors.definetransparency = definetransparency
local registered = { }
local function do_registerspotcolor(parent,parentnumber,e,f,d,p)
if not registered[parent] then
local v = colorvalues[parentnumber]
if v then
local model = currentmodel()
if model == 1 then
model = v[1]
end
if e and e ~= "" then
registrations.spotcolorname(parent,e) -- before registration of the color
end
if model == 2 then -- name noffractions names p's r g b
registrations.grayspotcolor(parent,f,d,p,v[2])
elseif model == 3 then
registrations.rgbspotcolor (parent,f,d,p,v[3],v[4],v[5])
elseif model == 4 then
registrations.cmykspotcolor(parent,f,d,p,v[6],v[7],v[8],v[9])
end
end
registered[parent] = true
end
end
-- local function do_registermultitonecolor(parent,name,parentnumber,e,f,d,p) -- same as spot but different template
-- if not registered[parent] then
-- local v = colorvalues[parentnumber]
-- if v then
-- local model = currentmodel()
-- if model == 1 then
-- model = v[1]
-- end
-- if model == 2 then
-- registrations.grayindexcolor(parent,f,d,p,v[2])
-- elseif model == 3 then
-- registrations.rgbindexcolor (parent,f,d,p,v[3],v[4],v[5])
-- elseif model == 4 then
-- registrations.cmykindexcolor(parent,f,d,p,v[6],v[7],v[8],v[9])
-- end
-- end
-- registered[parent] = true
-- end
-- end
function colors.definesimplegray(name,s)
return register_color(name,'gray',s) -- we still need to get rid of 'color'
end
local hexdigit = R("09","AF","af")
local hexnumber = hexdigit * hexdigit / function(s) return tonumber(s,16)/255 end
local hexpattern = hexnumber * (P(-1) + hexnumber * hexnumber * P(-1))
local hexcolor = Cc("H") * P("#") * hexpattern
local left = P("(")
local right = P(")")
local comma = P(",")
local mixnumber = lpegpatterns.number / tonumber
+ P("-") / function() return -1 end
local mixname = C(P(1-left-right-comma)^1)
----- mixcolor = Cc("M") * mixnumber * left * mixname * (comma * mixname)^-1 * right * P(-1)
local mixcolor = Cc("M") * mixnumber * left * mixname * (comma * mixname)^0 * right * P(-1) -- one is also ok
local exclamation = P("!")
local pgfnumber = lpegpatterns.digit^0 / function(s) return tonumber(s)/100 end
local pgfname = C(P(1-exclamation)^1)
local pgfcolor = Cc("P") * pgfname * exclamation * pgfnumber * (exclamation * pgfname)^-1 * P(-1)
local specialcolor = hexcolor + mixcolor
local l_color = attributes.list[a_color]
local l_transparency = attributes.list[a_transparency]
directives.register("colors.pgf",function(v)
if v then
specialcolor = hexcolor + mixcolor + pgfcolor
else
specialcolor = hexcolor + mixcolor
end
end)
local defineintermediatecolor
local function resolvedname(name)
local color
if valid[name] then
color = counts[name]
if color then
color = texgetcount(color)
else
color = l_color[name] -- fall back on old method
end
else
color = l_color[name] -- fall back on old method
end
return color, l_transparency[name]
end
local function defineprocesscolor(name,str,global,freeze) -- still inconsistent color vs transparent
local what, one, two, three = lpegmatch(specialcolor,str)
if what == "H" then
-- for old times sake (if we need to feed from xml or so)
definecolor(name, register_color(name,'rgb',one,two,three),global)
elseif what == "M" then
-- intermediate
-- return defineintermediatecolor(name,one,l_color[two],l_color[three],l_transparency[two],l_transparency[three],"",global,freeze)
local c1, t1 = resolvedname(two)
local c2, t2 = resolvedname(three)
return defineintermediatecolor(name,one,c1,c2,t1,t2,"",global,freeze)
elseif what == "P" then
-- pgf for tikz
-- return defineintermediatecolor(name,two,l_color[one],l_color[three],l_transparency[one],l_transparency[three],"",global,freeze)
local c1, t1 = resolvedname(one)
local c2, t2 = resolvedname(three)
return defineintermediatecolor(name,two,c1,c2,t1,t2,"",global,freeze)
else
local settings = settings_to_hash_strict(str)
if settings then
local r = settings.r
local g = settings.g
local b = settings.b
if r or g or b then
-- we can consider a combined rgb cmyk s definition
definecolor(name, register_color(name,'rgb', tonumber(r) or 0, tonumber(g) or 0, tonumber(b) or 0), global)
else
local c = settings.c
local m = settings.m
local y = settings.y
local k = settings.k
if c or m or y or k then
definecolor(name, register_color(name,'cmyk',tonumber(c) or 0, tonumber(m) or 0, tonumber(y) or 0, tonumber(k) or 0), global)
else
local h = settings.h
local s = settings.s
local v = settings.v
if v then
r, g, b = colors.hsvtorgb(tonumber(h) or 0, tonumber(s) or 1, tonumber(v) or 1) -- maybe later native
definecolor(name, register_color(name,'rgb',r,g,b), global)
else
local x = settings.x or h
if x then
r, g, b = lpegmatch(hexpattern,x) -- can be inlined
if r and g and b then
definecolor(name, register_color(name,'rgb',r,g,b), global)
else
definecolor(name, register_color(name,'gray',r or 0), global)
end
else
definecolor(name, register_color(name,'gray',tonumber(s) or 0), global)
end
end
end
end
local a = settings.a
local t = settings.t
if a and t then
definetransparent(name, transparencies.register(name,transparent[a] or tonumber(a) or 1,tonumber(t) or 1), global)
elseif colors.couple then
-- definetransparent(name, transparencies.register(nil, 1, 1), global) -- can be sped up
definetransparent(name, 0, global) -- can be sped up
end
elseif freeze then
local ca = attributes_list[a_color] [str]
local ta = attributes_list[a_transparency][str]
if ca then
definecolor(name, ca, global)
end
if ta then
definetransparent(name, ta, global)
end
else
inheritcolor(name, str, global)
inherittransparent(name, str, global)
-- if global and str ~= "" then -- For Peter Rolf who wants access to the numbers in Lua. (Currently only global is supported.)
-- attributes_list[a_color] [name] = attributes_list[a_color] [str] or attributes.unsetvalue -- reset
-- attributes_list[a_transparency][name] = attributes_list[a_transparency][str] or attributes.unsetvalue
-- end
end
end
colorset[name] = true-- maybe we can store more
end
-- You cannot overload a local color so one then has to use some prefix, like
-- mp:red. Kind of protection.
local function defineprocesscolordirect(settings)
if settings then
local name = settings.name
if name then
local r = settings.r
local g = settings.g
local b = settings.b
if r or g or b then
-- we can consider a combined rgb cmyk s definition
register_color(name,'rgb', r or 0, g or 0, b or 0)
else
local c = settings.c
local m = settings.m
local y = settings.y
local k = settings.k
if c or m or y or k then
register_color(name,'cmyk',c or 0, m or 0, y or 0, k or 0)
else
local h = settings.h
local s = settings.s
local v = settings.v
if v then
r, g, b = colors.hsvtorgb(h or 0, s or 1, v or 1) -- maybe later native
register_color(name,'rgb',r,g,b)
else
local x = settings.x or h
if x then
r, g, b = lpegmatch(hexpattern,x) -- can be inlined
if r and g and b then
register_color(name,'rgb',r,g,b)
else
register_color(name,'gray',r or 0)
end
else
register_color(name,'gray',s or 0)
end
end
end
end
local a = settings.a
local t = settings.t
if a and t then
transparencies.register(name,transparent[a] or a or 1,t or 1)
end
colorset[name] = true-- maybe we can store more
valid[name] = true
end
end
end
local function isblack(ca) -- maybe commands
local cv = ca > 0 and colorvalues[ca]
return (cv and cv[2] == 0) or false
end
colors.isblack = isblack
-- local m, c, t = attributes.colors.namedcolorattributes(parent)
-- if c and c > 1 then -- 1 is black
-- local v = attributes.colors.values[c]
local function definespotcolor(name,parent,str,global)
if parent == "" or find(parent,"=",1,true) then
colors.registerspotcolor(name, parent) -- does that work? no attr
elseif name ~= parent then
local cp = attributes_list[a_color][parent]
if cp then
local t = settings_to_hash_strict(str)
if t then
local tp = tonumber(t.p) or 1
do_registerspotcolor(parent,cp,t.e,1,"",tp) -- p not really needed, only diagnostics
if name and name ~= "" then
definecolor(name,register_color(name,'spot',parent,1,"",tp),true)
local ta = t.a
local tt = t.t
if ta and tt then
definetransparent(name, transparencies.register(name,transparent[ta] or tonumber(ta) or 1,tonumber(tt) or 1), global)
elseif colors.couple then
-- definetransparent(name, transparencies.register(nil, 1, 1), global) -- can be sped up
definetransparent(name, 0, global) -- can be sped up
end
end
end
end
end
colorset[name] = true-- maybe we can store more
end
function colors.registerspotcolor(parent, str)
local cp = attributes_list[a_color][parent]
if cp then
local e = ""
if str then
local t = settings_to_hash_strict(str)
e = (t and t.e) or ""
end
do_registerspotcolor(parent, cp, e, 1, "", 1) -- p not really needed, only diagnostics
end
end
local function f(i,colors,fraction)
local otf = 0
if type(fraction) == "table" then
for c=1,#colors do
otf = otf + (tonumber(fraction[c]) or 1) * colors[c][i]
end
else
fraction = tonumber(fraction)
for c=1,#colors do
otf = otf + fraction * colors[c]
end
end
if otf > 1 then
otf = 1
end
return otf
end
local function definemixcolor(makecolor,name,fractions,cs,global,freeze)
local values = { }
for i=1,#cs do -- do fraction in here
local v = colorvalues[cs[i]]
if not v then
return
end
values[i] = v
end
if #values > 0 then
csone = values[1][1]
local ca
if csone == 2 then
ca = register_color(name,'gray',f(2,values,fractions))
elseif csone == 3 then
ca = register_color(name,'rgb', f(3,values,fractions),
f(4,values,fractions),
f(5,values,fractions))
elseif csone == 4 then
ca = register_color(name,'cmyk',f(6,values,fractions),
f(7,values,fractions),
f(8,values,fractions),
f(9,values,fractions))
else
ca = register_color(name,'gray',f(2,values,fractions))
end
definecolor(name,ca,global,freeze)
else
report_colors("invalid specification of components for color %a",makecolor)
end
end
local function definemultitonecolor(name,multispec,colorspec,selfspec)
local dd = { }
local pp = { }
local nn = { }
local max = 0
for k,v in gmatch(multispec,"([^=,]+)=([^%,]*)") do -- use settings_to_array
max = max + 1
dd[max] = k
pp[max] = v
nn[max] = formatters["%s_%1.3g"](k,tonumber(v) or 0) -- 0 can't happen
end
if max > 0 then
nn = concat(nn,'_')
local parent = gsub(lower(nn),"[^%d%a%.]+","_")
if not colorspec or colorspec == "" then
-- this can happens when we come from metapost
local cc = { }
for i=1,max do
cc[i] = resolvedname(dd[i])
end
definemixcolor(name,parent,pp,cc,true,true)
else
if selfspec ~= "" then
colorspec = colorspec .. "," .. selfspec
end
defineprocesscolor(parent,colorspec,true,true)
end
local cp = attributes_list[a_color][parent]
dd, pp = concat(dd,','), concat(pp,',')
if cp then
do_registerspotcolor(parent, cp, "", max, dd, pp)
definecolor(name, register_color(name, 'spot', parent, max, dd, pp), true)
local t = settings_to_hash_strict(selfspec)
if t and t.a and t.t then
definetransparent(name, transparencies.register(name,transparent[t.a] or tonumber(t.a) or 1,tonumber(t.t) or 1), global)
elseif colors.couple then
-- definetransparent(name, transparencies.register(nil, 1, 1), global) -- can be sped up
definetransparent(name, 0, global) -- can be sped up
end
end
end
colorset[name] = true-- maybe we can store more
end
colors.defineprocesscolor = defineprocesscolor
colors.definespotcolor = definespotcolor
colors.definemultitonecolor = definemultitonecolor
colors.defineprocesscolordirect = defineprocesscolordirect -- test for mp
-- will move to mlib-col as colors in mp are somewhat messy due to the fact
-- that we cannot cast .. so we really need to use (s,s,s) for gray in order
-- to be able to map onto 'color'
local function mpcolor(model,ca,ta,default,name)
local cv = colorvalues[ca]
if cv then
local tv = transparencyvalues[ta]
-- maybe move the 5 logic into the forcedmodel call
local cm = cv[1]
if model == 1 then
model = cm
end
model = forcedmodel(model)
if cm == 5 and model == 4 then
model = 5 -- a cheat but ok as spot colors have a representation
end
if tv then
if model == 2 then
return formatters["transparent(%s,%s,(%s,%s,%s))"](tv[1],tv[2],cv[3],cv[4],cv[5])
elseif model == 3 then
return formatters["transparent(%s,%s,(%s,%s,%s))"](tv[1],tv[2],cv[3],cv[4],cv[5])
elseif model == 4 then
return formatters["transparent(%s,%s,(%s,%s,%s,%s))"](tv[1],tv[2],cv[6],cv[7],cv[8],cv[9])
elseif model == 5 then
-- return formatters['transparent(%s,%s,multitonecolor("%s",%s,"%s","%s"))'](tv[1],tv[2],cv[10],cv[11],cv[12],cv[13])
return formatters['transparent(%s,%s,namedcolor("%s"))'](tv[1],tv[2],name or cv[10])
else -- see ** in meta-ini.mkiv: return formatters["transparent(%s,%s,(%s))"](tv[1],tv[2],cv[2])
return formatters["transparent(%s,%s,(%s,%s,%s))"](tv[1],tv[2],cv[3],cv[4],cv[5])
end
else
if model == 2 then
return formatters["(%s,%s,%s)"](cv[3],cv[4],cv[5])
elseif model == 3 then
return formatters["(%s,%s,%s)"](cv[3],cv[4],cv[5])
elseif model == 4 then
return formatters["(%s,%s,%s,%s)"](cv[6],cv[7],cv[8],cv[9])
elseif model == 5 then
return formatters['namedcolor("%s")'](name or cv[10])
else -- see ** in meta-ini.mkiv: return formatters["%s"]((cv[2]))
return formatters["(%s,%s,%s)"](cv[3],cv[4],cv[5])
end
end
end
local tv = transparencyvalues[ta]
if tv then
return formatters["(%s,%s)"](tv[1],tv[2])
end
default = default or 0 -- rgb !
return formatters["(%s,%s,%s)"](default,default,default)
end
-- local function mpnamedcolor(name)
-- return mpcolor(texgetattribute(a_colormodel),l_color[name] or l_color.black,l_transparency[name] or false)
-- end
local colornamespace = getnamespace("colornumber")
local paletnamespace = getnamespace("colorpalet")
local function namedcolorattributes(name)
local space = texgetattribute(a_colormodel)
----- prefix = texgettoks("t_colo_prefix")
local prefix = texgetmacro("currentcolorprefix")
local color
if prefix ~= "" then
color = valid[prefix..name]
if not color then
local n = paletnamespace .. prefix .. name
color = valid[n]
if not color then
color = name
elseif color == true then
color = n
end
elseif color == true then
color = paletnamespace .. prefix .. name
end
else
color = valid[name]
if not color then
return space, l_color.black
elseif color == true then
color = name
end
end
color = counts[color]
if color then
color = texgetcount(color)
else
color = l_color[name] -- fall back on old method
end
if color then
return space, color, l_transparency[name]
else
return space, l_color.black
end
end
colors.namedcolorattributes = namedcolorattributes -- can be used local
local function mpnamedcolor(name)
local model, ca, ta = namedcolorattributes(name)
return mpcolor(model,ca,ta,nil,name)
end
local function mpoptions(model,ca,ta,default) -- will move to mlib-col .. not really needed
return formatters["withcolor %s"](mpcolor(model,ca,ta,default))
end
colors.mpcolor = mpcolor
colors.mpnamedcolor = mpnamedcolor
colors.mpoptions = mpoptions
-- elsewhere:
--
-- mp.NamedColor = function(str)
-- mpprint(mpnamedcolor(str))
-- end
-- local function formatcolor(ca,separator)
-- local cv = colorvalues[ca]
-- if cv then
-- local c, cn, f, t, model = { }, 0, 13, 13, cv[1]
-- if model == 2 then
-- return c[2]
-- elseif model == 3 then
-- return concat(c,separator,3,5)
-- elseif model == 4 then
-- return concat(c,separator,6,9)
-- end
-- else
-- return 0
-- end
-- end
local function formatcolor(ca,separator)
local cv = colorvalues[ca]
if cv then
local c, cn, f, t, model = { }, 0, 13, 13, cv[1]
if model == 2 then
f, t = 2, 2
elseif model == 3 then
f, t = 3, 5
elseif model == 4 then
f, t = 6, 9
end
for i=f,t do
cn = cn + 1
c[cn] = format("%0.3f",cv[i])
end
return concat(c,separator)
else
return format("%0.3f",0)
end
end
local function formatgray(ca,separator)
local cv = colorvalues[ca]
return format("%0.3f",(cv and cv[2]) or 0)
end
colors.formatcolor = formatcolor
colors.formatgray = formatgray
local f_gray = formatters["s=%1.3f"]
local f_rgb = formatters["r=%1.3f%sg=%1.3f%sb=%1.3f"]
local f_cmyk = formatters["c=%1.3f%sm=%1.3f%sy=%1.3f%sk=%1.3f"]
local f_spot_name = formatters["p=%s"]
local f_spot_value = formatters["p=%1.3f"]
local f_transparency = formatters["a=%1.3f%st=%1.3f"]
local f_both = formatters["%s%s%s"]
local function colorcomponents(ca,separator) -- return list
local cv = colorvalues[ca]
if cv then
local model = cv[1]
if model == 2 then
return f_gray(cv[2])
elseif model == 3 then
return f_rgb(cv[3],separator or " ",cv[4],separator or " ",cv[5])
elseif model == 4 then
return f_cmyk(cv[6],separator or " ",cv[7],separator or " ",cv[8],separator or " ",cv[9])
elseif type(cv[13]) == "string" then
return f_spot_name(cv[13])
else
return f_spot_value(cv[13])
end
else
return ""
end
end
local function transparencycomponents(ta,separator)
local tv = transparencyvalues[ta]
if tv then
return f_transparency(tv[1],separator or " ",tv[2])
else
return ""
end
end
local function processcolorcomponents(ca,separator)
local cs = colorcomponents(ca,separator)
local ts = transparencycomponents(ca,separator)
if cs == "" then
return ts
elseif ts == "" then
return cs
else
return f_both(cs,separator or " ",ts)
end
end
local function spotcolorname(ca,default)
local cv, v = colorvalues[ca], "unknown"
if not cv and type(ca) == "string" then
ca = resolvedname(ca) -- we could metatable colorvalues
cv = colorvalues[ca]
end
if cv and cv[1] == 5 then
v = cv[10]
end
return tostring(v)
end
local function spotcolorparent(ca,default)
local cv, v = colorvalues[ca], "unknown"
if not cv and type(ca) == "string" then
ca = resolvedname(ca) -- we could metatable colorvalues
cv = colorvalues[ca]
end
if cv and cv[1] == 5 then
v = cv[12]
if v == "" then
v = cv[10]
end
end
return tostring(v)
end
local function spotcolorvalue(ca,default)
local cv, v = colorvalues[ca], 0
if not cv and type(ca) == "string" then
ca = resolvedname(ca) -- we could metatable colorvalues
cv = colorvalues[ca]
end
if cv and cv[1] == 5 then
v = cv[13]
end
return tostring(v)
end
colors.colorcomponents = colorcomponents
colors.transparencycomponents = transparencycomponents
colors.processcolorcomponents = processcolorcomponents
colors.spotcolorname = spotcolorname
colors.spotcolorparent = spotcolorparent
colors.spotcolorvalue = spotcolorvalue
-- experiment (a bit of a hack, as we need to get the attribute number)
local min = math.min
-- a[b,c] -> b+a*(c-b)
local function inbetween(one,two,i,fraction)
local o, t = one[i], two[i]
local c = fraction < 0
if c then
fraction = - fraction
end
local otf = o + fraction * (t - o)
if otf > 1 then
otf = 1
end
if c then
return 1 - otf
else
return otf
end
end
local function justone(one,fraction,i)
local otf = fraction * one[i]
if otf > 1 then
otf = 1
end
return otf
end
local function complement(one,fraction,i)
local otf = - fraction * (1 - one[i])
if otf > 1 then
otf = 1
end
return otf
end
colors.helpers = {
inbetween = inbetween,
justone = justone,
complement = complement,
}
defineintermediatecolor = function(name,fraction,c_one,c_two,a_one,a_two,specs,global,freeze)
fraction = tonumber(fraction) or 1
local one, two = colorvalues[c_one], colorvalues[c_two] -- beware, it uses the globals
if one then
if two then
local csone, cstwo = one[1], two[1]
-- if csone == cstwo then
-- actually we can set all 8 values at once here but this is cleaner as we avoid
-- problems with weighted gray conversions and work with original values
local ca
if csone == 2 then
ca = register_color(name,'gray',inbetween(one,two,2,fraction))
elseif csone == 3 then
ca = register_color(name,'rgb', inbetween(one,two,3,fraction),
inbetween(one,two,4,fraction),
inbetween(one,two,5,fraction))
elseif csone == 4 then
ca = register_color(name,'cmyk',inbetween(one,two,6,fraction),
inbetween(one,two,7,fraction),
inbetween(one,two,8,fraction),
inbetween(one,two,9,fraction))
else
ca = register_color(name,'gray',inbetween(one,two,2,fraction))
end
definecolor(name,ca,global,freeze)
-- end
else
local inbetween = fraction < 0 and complement or justone
local csone = one[1]
local ca
if csone == 2 then
ca = register_color(name,'gray',inbetween(one,fraction,2))
elseif csone == 3 then
ca = register_color(name,'rgb', inbetween(one,fraction,3),
inbetween(one,fraction,4),
inbetween(one,fraction,5))
elseif csone == 4 then
ca = register_color(name,'cmyk',inbetween(one,fraction,6),
inbetween(one,fraction,7),
inbetween(one,fraction,8),
inbetween(one,fraction,9))
else
ca = register_color(name,'gray',inbetween(one,fraction,2))
end
definecolor(name,ca,global,freeze)
end
end
local one, two = transparencyvalues[a_one], transparencyvalues[a_two]
local t = settings_to_hash_strict(specs)
local ta = tonumber((t and t.a) or (one and one[1]) or (two and two[1]))
local tt = tonumber((t and t.t) or (one and two and f(one,two,2,fraction)))
if ta and tt then
definetransparent(name,transparencies.register(name,ta,tt),global)
end
end
colors.defineintermediatecolor = defineintermediatecolor
-- for the moment downward compatible
local patterns = {
"colo-imp-%s.mkiv",
"colo-imp-%s.tex",
-- obsolete:
"colo-%s.mkiv",
"colo-%s.tex"
}
local function action(name,foundname)
-- could be one command
context.startreadingfile()
context.startcolorset { name }
context.input(foundname)
context.showmessage("colors",4,name)
context.stopcolorset()
context.stopreadingfile()
end
local function failure(name)
-- context.showmessage("colors",5,name)
report_colors("unknown library %a",name)
end
local function usecolors(name)
commands.uselibrary {
category = "color definition",
name = name,
patterns = patterns,
action = action,
failure = failure,
onlyonce = true,
}
end
colors.usecolors = usecolors
-- backend magic
local currentpagecolormodel
function colors.setpagecolormodel(model)
currentpagecolormodel = model
end
function colors.getpagecolormodel()
return currentpagecolormodel
end
-- interface
local setcolormodel = colors.setmodel
implement {
name = "synccolorcount",
actions = synccolorcount,
arguments = { "string", "integer" }
}
implement {
name = "synccolor",
actions = synccolor,
arguments = "string",
}
implement {
name = "synccolorclone",
actions = synccolorclone,
arguments = "2 strings",
}
implement {
name = "setcolormodel",
arguments = "2 strings",
actions = function(model,weight)
texsetattribute(a_colormodel,setcolormodel(model,weight))
end
}
implement {
name = "setpagecolormodel",
actions = colors.setpagecolormodel,
arguments = "string",
}
implement {
name = "defineprocesscolorlocal",
actions = defineprocesscolor,
arguments = { "string", "string", false, "boolean" }
}
implement {
name = "defineprocesscolorglobal",
actions = defineprocesscolor,
arguments = { "string", "string", true, "boolean" }
}
implement {
name = "defineprocesscolordummy",
actions = defineprocesscolor,
arguments = { "'c_o_l_o_r'", "string", false, false }
}
implement {
name = "definespotcolorglobal",
actions = definespotcolor,
arguments = { "string", "string", "string", true }
}
implement {
name = "definemultitonecolorglobal",
actions = definemultitonecolor,
arguments = { "string", "string", "string", "string", true }
}
implement {
name = "registermaintextcolor",
actions = function(main)
colors.main = main
end,
arguments = "integer"
}
implement {
name = "definetransparency",
actions = definetransparency,
arguments = "2 strings"
}
implement {
name = "definetransparencyglobal",
actions = definetransparency,
arguments = { "string", "string", true }
}
implement {
name = "defineintermediatecolor",
actions = defineintermediatecolor,
arguments = { "string", "string", "integer", "integer", "integer", "integer", "string", false, "boolean" }
}
implement { name = "spotcolorname", actions = { spotcolorname, context }, arguments = "integer" }
implement { name = "spotcolorparent", actions = { spotcolorparent, context }, arguments = "integer" }
implement { name = "spotcolorvalue", actions = { spotcolorvalue, context }, arguments = "integer" }
implement { name = "colorcomponents", actions = { colorcomponents, context }, arguments = { "integer", tokens.constant(",") } }
implement { name = "transparencycomponents", actions = { transparencycomponents, context }, arguments = { "integer", tokens.constant(",") } }
implement { name = "processcolorcomponents", actions = { processcolorcomponents, context }, arguments = { "integer", tokens.constant(",") } }
implement { name = "formatcolor", actions = { formatcolor, context }, arguments = { "integer", "string" } }
implement { name = "formatgray", actions = { formatgray, context }, arguments = { "integer", "string" } }
implement {
name = "mpcolor",
actions = { mpcolor, context },
arguments = { "integer", "integer", "integer" }
}
implement {
name = "mpoptions",
actions = { mpoptions, context },
arguments = { "integer", "integer", "integer" }
}
local ctx_doifelse = commands.doifelse
implement {
name = "doifelsedrawingblack",
actions = function() ctx_doifelse(isblack(texgetattribute(a_color))) end
}
implement {
name = "doifelseblack",
actions = { isblack, ctx_doifelse },
arguments = "integer"
}
-- function commands.withcolorsinset(name,command)
-- local set
-- if name and name ~= "" then
-- set = colorsets[name]
-- else
-- set = colorsets.default
-- end
-- if set then
-- if command then
-- for name in table.sortedhash(set) do
-- context[command](name)
-- end
-- else
-- context(concat(table.sortedkeys(set),","))
-- end
-- end
-- end
implement { name = "startcolorset", actions = pushset, arguments = "string" }
implement { name = "stopcolorset", actions = popset }
implement { name = "usecolors", actions = usecolors, arguments = "string" }
-- bonus
do
local function pgfxcolorspec(model,ca) -- {}{}{colorspace}{list}
-- local cv = attributes.colors.values[ca]
local cv = colorvalues[ca]
local str
if cv then
if model and model ~= 0 then
model = model
else
model = forcedmodel(texgetattribute(a_colormodel))
if model == 1 then
model = cv[1]
end
end
if model == 3 then
str = formatters["{rgb}{%1.3f,%1.3f,%1.3f}"](cv[3],cv[4],cv[5])
elseif model == 4 then
str = formatters["{cmyk}{%1.3f,%1.3f,%1.3f,%1.3f}"](cv[6],cv[7],cv[8],cv[9])
else -- there is no real gray
str = formatters["{rgb}{%1.3f,%1.3f,%1.3f}"](cv[2],cv[2],cv[2])
end
else
str = "{rgb}{0,0,0}"
end
if trace_pgf then
report_pgf("model %a, string %a",model,str)
end
return str
end
implement {
name = "pgfxcolorspec",
actions = { pgfxcolorspec, context },
arguments = { "integer", "integer" }
}
end
-- handy
local models = storage.allocate { "all", "gray", "rgb", "cmyk", "spot" }
colors.models = models -- check for usage elsewhere
function colors.spec(name)
local l = attributes_list[a_color]
local t = colorvalues[l[name]] or colorvalues[l.black]
return {
model = models[t[1]] or models[1],
s = t[2],
r = t[3], g = t[4], b = t[5],
c = t[6], m = t[7], y = t[8], k = t[9],
}
end
function colors.currentnamedmodel()
return models[texgetattribute(a_colormodel)] or "gray"
end
-- inspect(attributes.colors.spec("red"))
-- inspect(attributes.colors.spec("red socks"))
implement {
name = "negatedcolorcomponent",
arguments = "string",
actions = function(s)
s = 1 - (tonumber(s) or 0)
context((s < 0 and 0) or (s > 1 and 1) or s)
end
}
