diff options
Diffstat (limited to 'tex/context/base/colo-ini.lua')
| -rw-r--r-- | tex/context/base/colo-ini.lua | 65 |
1 files changed, 61 insertions, 4 deletions
diff --git a/tex/context/base/colo-ini.lua b/tex/context/base/colo-ini.lua index 30b18983d..28ce4ac6a 100644 --- a/tex/context/base/colo-ini.lua +++ b/tex/context/base/colo-ini.lua @@ -6,7 +6,7 @@ if not modules then modules = { } end modules ['colo-ini'] = { license = "see context related readme files" } -local type = type +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 texsprint = tex.sprint @@ -14,6 +14,8 @@ local ctxcatcodes = tex.ctxcatcodes local trace_define = false trackers.register("colors.define",function(v) trace_define = v end) +local report_colors = logs.new("colors") + local settings_to_hash_strict = aux.settings_to_hash_strict colors = colors or { } @@ -133,6 +135,60 @@ local transparent = { 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.) @@ -319,13 +375,14 @@ function colors.definemultitonecolor(name,multispec,colorspec,selfspec) end end -function colors.mp(model,ca,ta,default) - local cv = colors.value(ca) -- faster when direct colors.values[ca] +function colors.mp(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.value(ta) + 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]) |