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|
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 = type, tonumber
local concat = table.concat
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 trace_define = false trackers.register("colors.define",function(v) trace_define = v end)
local report_colors = logs.new("colors","defining")
local attributes, context, commands = attributes, context, commands
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 settexattribute = tex.setattribute
local gettexattribute = tex.getattribute
local a_color = attributes.private('color')
local a_transparency = attributes.private('transparency')
local a_colorspace = attributes.private('colormodel')
local a_background = attributes.private('background')
local register_color = colors.register
local attributes_list = attributes.list
local function definecolor(name, ca, global)
if ca and ca > 0 then
if global then
if trace_define then
report_colors("define global color '%s' with attribute: %s",name,ca)
end
context.colordefagc(name,ca)
else
if trace_define then
report_colors("define local color '%s' with attribute: %s",name,ca)
end
context.colordefalc(name,ca)
end
else
if global then
context.colordefrgc(name)
else
context.colordefrlc(name)
end
end
end
local function inheritcolor(name, ca, global)
if ca and ca ~= "" then
if global then
if trace_define then
report_colors("inherit global color '%s' with attribute: %s",name,ca)
end
context.colordeffgc(name,ca) -- some day we will set the macro directly
else
if trace_define then
report_colors("inherit local color '%s' with attribute: %s",name,ca)
end
context.colordefflc(name,ca)
end
else
if global then
context.colordefrgc(name)
else
context.colordefrlc(name)
end
end
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 '%s' with attribute: %s",name,ta)
end
context.colordefagt(name,ta)
else
if trace_define then
report_colors("define local transparency '%s' with attribute: %s",name,ta)
end
context.colordefalt(name,ta)
end
else
if global then
context.colordefrgt(name)
else
context.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 '%s' with attribute: %s",name,ta)
end
context.colordeffgt(name,ta)
else
if trace_define then
report_colors("inherit local transparency '%s' with attribute: %s",name,ta)
end
context.colordefflt(name,ta)
end
else
if global then
context.colordefrgt(name)
else
context.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,
}
-- backend driven limitations
colors.supported = true -- always true
transparencies.supported = true
local gray_okay, rgb_okay, cmyk_okay, spot_okay, multichannel_okay, forced = true, true, true, true, true, false
function colors.forcesupport(gray,rgb,cmyk,spot,multichannel) -- pdfx driven
gray_okay, rgb_okay, cmyk_okay, spot_okay, multichannel_okay, forced = gray, rgb, cmyk, spot, multichannel, true
report_colors("supported models: gray=%s, rgb=%s, cmyk=%s, spot=%s", -- multichannel=%s
tostring(gray), tostring(rgb), tostring(cmyk), tostring(spot)) -- tostring(multichannel)
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 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
function colors.definetransparency(name,n)
transparent[name] = n
end
local registered = { }
local function do_registerspotcolor(parent,name,parentnumber,e,f,d,p)
if not registered[parentnumber] then
local v = colors.values[parentnumber]
if v then
local kind = colors.default -- else problems with shading etc
if kind == 1 then kind = v[1] end
if e and e ~= "" then
registrations.spotcolorname(parent,e) -- before registration of the color
end
if kind == 2 then -- name noffractions names p's r g b
registrations.grayspotcolor(parent,f,d,p,v[2])
elseif kind == 3 then
registrations.rgbspotcolor (parent,f,d,p,v[3],v[4],v[5])
elseif kind == 4 then
registrations.cmykspotcolor(parent,f,d,p,v[6],v[7],v[8],v[9])
end
end
registered[parentnumber] = true
end
end
local function do_registermultitonecolor(parent,name,parentnumber,e,f,d,p) -- same as spot but different template
if not registered[parentnumber] then
local v = colors.values[parentnumber]
if v then
local kind = colors.default -- else problems with shading etc
if kind == 1 then kind = v[1] end
if kind == 2 then
registrations.grayindexcolor(parent,f,d,p,v[2])
elseif kind == 3 then
registrations.rgbindexcolor (parent,f,d,p,v[3],v[4],v[5])
elseif kind == 4 then
registrations.cmykindexcolor(parent,f,d,p,v[6],v[7],v[8],v[9])
end
end
registered[parentnumber] = 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 + Cc(0)
local hexpattern = hexnumber^-3 * P(-1)
local hexcolor = Cc("H") * P("#") * hexpattern
local left = P("(")
local right = P(")")
local comma = P(",")
local mixnumber = lpegpatterns.number / tonumber
local mixname = C(P(1-left-right-comma)^1)
local mixcolor = Cc("M") * mixnumber * left * mixname * (comma * mixname)^-1 * right * P(-1)
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)
function colors.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 colors.defineintermediatecolor(name,one,l_color[two],l_color[three],l_transparency[two],l_transparency[three],"",global,freeze)
elseif what == "P" then
-- pgf for tikz
return colors.defineintermediatecolor(name,two,l_color[one],l_color[three],l_transparency[one],l_transparency[three],"",global,freeze)
else
local settings = settings_to_hash_strict(str)
if settings then
local r, g, b = settings.r, settings.g, 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, m, y, k = settings.c, settings.m, settings.y, settings.k
if c or m or y or b 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, s, v = settings.h, settings.s, 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
definecolor(name, register_color(name,'rgb',r,g,b), global)
else
definecolor(name, register_color(name,'gray',tonumber(s) or 0), global)
end
end
end
end
local a, t = settings.a, 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
end
function colors.isblack(ca) -- maybe commands
local cv = ca > 0 and colors.value(ca)
return (cv and cv[2] == 0) or false
end
function colors.definespotcolor(name,parent,str,global)
if parent == "" or find(parent,"=") then
colors.registerspotcolor(name, parent)
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, name, 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, tt = t.a, 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
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, "dummy", cp, e, 1, "", 1) -- p not really needed, only diagnostics
end
end
function colors.definemultitonecolor(name,multispec,colorspec,selfspec)
local dd, pp, nn, max = { }, { }, { }, 0
for k,v in gmatch(multispec,"(%a+)=([^%,]*)") do
max = max + 1
dd[max] = k
pp[max] = v
nn[max] = format("%s_%1.3g",k,tonumber(v) or 0) -- 0 can't happen
end
if max > 0 then
dd, pp, nn = concat(dd,','), concat(pp,','), concat(nn,'_')
local parent = gsub(lower(nn),"[^%d%a%.]+","_")
colors.defineprocesscolor(parent,colorspec..","..selfspec,true,true)
local cp = attributes_list[a_color][parent]
if cp then
do_registerspotcolor(parent, name, cp, "", max, dd, pp)
do_registermultitonecolor(parent, name, 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
end
function colors.mpcolor(model,ca,ta,default) -- will move to mlib-col
local cv = colors.supported and colors.value(ca) -- faster when direct colors.values[ca]
if cv then
local tv = transparencies.supported and transparencies.value(ta)
if model == 1 then
model = cv[1]
end
model = forcedmodel(model)
if tv then
if model == 2 then
return format("transparent(%s,%s,(%s,%s,%s))",tv[1],tv[2],cv[3],cv[4],cv[5])
elseif model == 3 then
return format("transparent(%s,%s,(%s,%s,%s))",tv[1],tv[2],cv[3],cv[4],cv[5])
elseif model == 4 then
return format("transparent(%s,%s,cmyk(%s,%s,%s,%s))",tv[1],tv[2],cv[6],cv[7],cv[8],cv[9])
else
return format("transparent(%s,%s,multitonecolor(\"%s\",%s,\"%s\",\"%s\"))",tv[1],tv[2],cv[10],cv[11],cv[12],cv[13])
end
else
if model == 2 then
return format("(%s,%s,%s)",cv[3],cv[4],cv[5])
elseif model == 3 then
return format("(%s,%s,%s)",cv[3],cv[4],cv[5])
elseif model == 4 then
return format("cmyk(%s,%s,%s,%s)",cv[6],cv[7],cv[8],cv[9])
else
return format("multitonecolor(\"%s\",%s,\"%s\",\"%s\")",cv[10],cv[11],cv[12],cv[13])
end
end
else
default = default or 0 -- rgb !
return format("(%s,%s,%s)",default,default,default)
end
end
function colors.formatcolor(ca,separator)
local cv = colors.value(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
function colors.formatgray(ca,separator)
local cv = colors.value(ca)
return format("%0.3f",(cv and cv[2]) or 0)
end
function colors.colorcomponents(ca) -- return list
local cv = colors.value(ca)
if cv then
local model = cv[1]
if model == 2 then
return format("s=%1.3f",cv[2])
elseif model == 3 then
return format("r=%1.3f g=%1.3f b=%1.3f",cv[3],cv[4],cv[5])
elseif model == 4 then
return format("c=%1.3f m=%1.3f y=%1.3f k=%1.3f",cv[6],cv[7],cv[8],cv[9])
elseif type(cv[13]) == "string" then
return format("p=%s",cv[13])
else
return format("p=%1.3f",cv[13])
end
else
return ""
end
end
function colors.transparencycomponents(ta)
local tv = transparencies.value(ta)
if tv then
return format("a=%1.3f t=%1.3f",tv[1],tv[2])
else
return ""
end
end
function colors.spotcolorname(ca,default)
local cv, v = colors.value(ca), "unknown"
if cv and cv[1] == 5 then
v = cv[10]
end
return tostring(v)
end
function colors.spotcolorparent(ca,default)
local cv, v = colors.value(ca), "unknown"
if cv and cv[1] == 5 then
v = cv[12]
if v == "" then
v = cv[10]
end
end
return tostring(v)
end
function colors.spotcolorvalue(ca,default)
local cv, v = colors.value(ca), 0
if cv and cv[1] == 5 then
v = cv[13]
end
return tostring(v)
end
-- 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 f(one,two,i,fraction)
local o, t = one[i], two[i]
local otf = o + fraction * (t - o)
if otf > 1 then
otf = 1
end
return otf
end
function colors.defineintermediatecolor(name,fraction,c_one,c_two,a_one,a_two,specs,global,freeze)
fraction = tonumber(fraction) or 1
local one, two = colors.value(c_one), colors.value(c_two)
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',f(one,two,2,fraction))
elseif csone == 3 then
ca = register_color(name,'rgb', f(one,two,3,fraction),f(one,two,4,fraction),f(one,two,5,fraction))
elseif csone == 4 then
ca = register_color(name,'cmyk',f(one,two,6,fraction),f(one,two,7,fraction),f(one,two,8,fraction),f(one,two,9,fraction))
else
ca = register_color(name,'gray',f(one,two,2,fraction))
end
definecolor(name,ca,global,freeze)
end
else
local csone = one[1]
local ca
if csone == 2 then
ca = register_color(name,'gray',fraction*one[2])
elseif csone == 3 then
ca = register_color(name,'rgb', fraction*one[3],fraction*one[4],fraction*one[5])
elseif csone == 4 then
ca = register_color(name,'cmyk',fraction*one[6],fraction*one[7],fraction*one[8],fraction*one[9])
else
ca = register_color(name,'gray',fraction*one[2])
end
definecolor(name,ca,global,freeze)
end
end
local one, two = transparencies.value(a_one), transparencies.value(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
-- for the moment downward compatible
local patterns = { "colo-imp-%s.mkiv", "colo-imp-%s.tex", "colo-%s.mkiv", "colo-%s.tex" }
function colors.usecolors(name)
commands.uselibrary(name,patterns,function(name,foundname)
context.startreadingfile()
context.input(foundname)
context.showcolormessage("colors",4,name)
context.stopreadingfile()
end, function(name)
context.showcolormessage("colors",5,name)
end)
end
-- interface
local setcolormodel = colors.setmodel
function commands.setcolormodel(model,weight)
settexattribute(a_colorspace,setcolormodel(model,weight))
end
function commands.setrastercolor(name,s)
settexattribute(a_color,colors.definesimplegray(name,s))
end
function commands.registermaintextcolor(a)
colors.main = a
end
commands.defineprocesscolor = colors.defineprocesscolor
commands.definespotcolor = colors.definespotcolor
commands.definemultitonecolor = colors.definemultitonecolor
commands.definetransparency = colors.definetransparency
commands.defineintermediatecolor = colors.defineintermediatecolor
function commands.spotcolorname (a) context(colors.spotcolorname (a)) end
function commands.spotcolorparent (a) context(colors.spotcolorparent (a)) end
function commands.spotcolorvalue (a) context(colors.spotcolorvalue (a)) end
function commands.colorcomponents (a) context(colors.colorcomponents (a)) end
function commands.transparencycomponents(a) context(colors.transparencycomponents(a)) end
function commands.formatcolor (a) context(colors.formatcolor (a)) end
function commands.formatgray (a) context(colors.formatgray (a)) end
function commands.mpcolor(model,ca,ta,default)
context(colors.mpcolor(model,ca,ta,default))
end
function commands.doifblackelse(a)
commands.doifelse(colors.isblack(a))
end
function commands.doifdrawingblackelse()
commands.doifelse(colors.isblack(gettexattribute(a_color)))
end
commands.usecolors = colors.usecolors
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