summaryrefslogtreecommitdiff
path: root/Master/texmf-dist/tex/context/base/colo-new.lua
blob: fb14570706bfd99c3d9a4d7fe51ae1e2297373f3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
if not modules then modules = { } end modules ['colo-ini'] = {
    version   = 1.000,
    comment   = "companion to colo-ini.tex",
    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
    copyright = "PRAGMA ADE / ConTeXt Development Team",
    license   = "see context related readme files"
}

-- split_settings -> aux.settings_to_hash

-- for the moment this looks messy but we're waiting for a pdf backend interface
--
-- code collected here will move and be adapted
--
-- some pdf related code can go away

-- spec-pdf.lua

-- todo: %s -> %f

backends     = backends     or { }
backends.pdf = backends.pdf or { }
backend      = backends.pdf

local texsprint, format, concat = tex.sprint, string.format, table.concat

local s_template_g = "\\dodoPDFregistergrayspotcolor{%s}{%s}{%s}{%s}{%s}"             -- n f d p s (p can go away)
local s_template_r = "\\dodoPDFregisterrgbspotcolor {%s}{%s}{%s}{%s}{%s}{%s}{%s}"     -- n f d p r g b
local s_template_c = "\\dodoPDFregistercmykspotcolor{%s}{%s}{%s}{%s}{%s}{%s}{%s}{%s}" -- n f d p c m y k

function backends.pdf.registergrayspotcolor(n,f,d,p,s)       states.collect(s_template_g:format(n,f,d,p,s))       end
function backends.pdf.registerrgbspotcolor (n,f,d,p,r,g,b)   states.collect(s_template_r:format(n,f,d,p,r,g,b))   end
function backends.pdf.registercmykspotcolor(n,f,d,p,c,m,y,k) states.collect(s_template_c:format(n,f,d,p,c,m,y,k)) end

local m_template_g = "\\doPDFregistergrayindexcolor{%s}{%s}{%s}{%s}{%s}"             -- n f d p s (p can go away)
local m_template_r = "\\doPDFregisterrgbindexcolor {%s}{%s}{%s}{%s}{%s}{%s}{%s}"     -- n f d p r g b
local m_template_c = "\\doPDFregistercmykindexcolor{%s}{%s}{%s}{%s}{%s}{%s}{%s}{%s}" -- n f d p c m y k

function backends.pdf.registergrayindexcolor(n,f,d,p,s)       states.collect(m_template_g:format(n,f,d,p,s))       end
function backends.pdf.registerrgbindexcolor (n,f,d,p,r,g,b)   states.collect(m_template_r:format(n,f,d,p,r,g,b))   end
function backends.pdf.registercmykindexcolor(n,f,d,p,c,m,y,k) states.collect(m_template_c:format(n,f,d,p,c,m,y,k)) end

local s_template_e = "\\doPDFregisterspotcolorname{%s}{%s}" -- name, e

function backends.pdf.registerspotcolorname(name,e)
    if e and e ~= "" then
       texsprint(tex.ctxcatcodes,format(s_template_e,name,e)) -- todo in new backend: e:gsub(" ","#20")
    end
end

ctx     = ctx     or { }
ctx.aux = ctx.aux or { }

local a_l_c_template = "\\setevalue{(ca:%s)}{%s}" ..
                       "\\setevalue{(cs:%s)}{\\dosetattribute{color}{%s}}"
local a_g_c_template = "\\setxvalue{(ca:%s)}{%s}" ..
                       "\\setxvalue{(cs:%s)}{\\dosetattribute{color}{%s}}"
local f_l_c_template = "\\setvalue {(ca:%s)}{\\doinheritca{%s}}" ..
                       "\\setvalue {(cs:%s)}{\\doinheritcs{%s}}"
local f_g_c_template = "\\setgvalue{(ca:%s)}{\\doinheritca{%s}}" ..
                       "\\setgvalue{(cs:%s)}{\\doinheritcs{%s}}"
local r_l_c_template = "\\letbeundefined{(ca:%s)}" ..
                       "\\letbeundefined{(cs:%s)}"
local r_g_c_template = "\\global\\letbeundefined{(ca:%s)}" ..
                       "\\global\\letbeundefined{(cs:%s)}"

local a_l_t_template = "\\setevalue{(ta:%s)}{%s}" ..
                       "\\setevalue{(ts:%s)}{\\dosetattribute{transparency}{%s}}"
local a_g_t_template = "\\setxvalue{(ta:%s)}{%s}" ..
                       "\\setxvalue{(ts:%s)}{\\dosetattribute{transparency}{%s}}"
local f_l_t_template = "\\setvalue {(ta:%s)}{\\doinheritta{%s}}" ..
                       "\\setvalue {(ts:%s)}{\\doinheritts{%s}}"
local f_g_t_template = "\\setgvalue{(ta:%s)}{\\doinheritta{%s}}" ..
                       "\\setgvalue{(ts:%s)}{\\doinheritts{%s}}"
local r_l_t_template = "\\letbeundefined{(ta:%s)}" ..
                       "\\letbeundefined{(ts:%s)}"
local r_g_t_template = "\\global\\letbeundefined{(ta:%s)}" ..
                       "\\global\\letbeundefined{(ts:%s)}"

function ctx.aux.definecolor(name, ca, global)
    if ca and ca > 0 then
        if global then
            texsprint(tex.ctxcatcodes,a_g_c_template:format(name, ca, name, ca))
        else
            texsprint(tex.ctxcatcodes,a_l_c_template:format(name, ca, name, ca))
        end
    else
        if global then
            texsprint(tex.ctxcatcodes,r_g_c_template:format(name, name))
        else
            texsprint(tex.ctxcatcodes,r_l_c_template:format(name, name))
        end
    end
end
function ctx.aux.inheritcolor(name, ca, global)
    if ca and ca ~= "" then
        if global then
            texsprint(tex.ctxcatcodes,f_g_c_template:format(name, ca, name, ca))
        else
            texsprint(tex.ctxcatcodes,f_l_c_template:format(name, ca, name, ca))
        end
    else
        if global then
            texsprint(tex.ctxcatcodes,r_g_c_template:format(name, name))
        else
            texsprint(tex.ctxcatcodes,r_l_c_template:format(name, name))
        end
    end
end
function ctx.aux.definetransparent(name, ta, global)
    if ta and ta > 0 then
        if global then
            texsprint(tex.ctxcatcodes,a_g_t_template:format(name, ta, name, ta))
        else
            texsprint(tex.ctxcatcodes,a_l_t_template:format(name, ta, name, ta))
        end
    else
        if global then
            texsprint(tex.ctxcatcodes,r_g_t_template:format(name, name))
        else
            texsprint(tex.ctxcatcodes,r_l_t_template:format(name, name))
        end
    end
end
function ctx.aux.inherittransparent(name, ta, global)
    if ta and ta ~= "" then
        if global then
            texsprint(tex.ctxcatcodes,f_g_t_template:format(name, ta, name, ta))
        else
            texsprint(tex.ctxcatcodes,f_l_t_template:format(name, ta, name, ta))
        end
    else
        if global then
            texsprint(tex.ctxcatcodes,r_g_t_template:format(name, name))
        else
            texsprint(tex.ctxcatcodes,r_l_t_template:format(name, 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,
}

-- 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.

ctx.couplecolors = true

function ctx.definetransparency(name,n)
    transparent[name] = n
end

local registered = { }

local function registerspotcolor(parent,name,parentnumber,e,f,d,p)
    if not registered[parentnumber] then
        local v = colors.values[parentnumber]
        if v then
            local kind = v[1]
            if     kind == 2 then -- name noffractions names p's r g b
                backend.registergrayspotcolor(parent,f,d,p,v[2])
            elseif kind == 3 then
                backend.registerrgbspotcolor (parent,f,d,p,v[3],v[4],v[5])
            elseif kind == 4 then
                backend.registercmykspotcolor(parent,f,d,p,v[6],v[7],v[8],v[9])
            end
            backends.pdf.registerspotcolorname(parent,e)
        end
        registered[parentnumber] = true
    end
end

local function 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 = v[1]
            if     kind == 2 then
                backend.registergrayindexcolor(parent,f,d,p,v[2])
            elseif kind == 3 then
                backend.registerrgbindexcolor (parent,f,d,p,v[3],v[4],v[5])
            elseif kind == 4 then
                backend.registercmykindexcolor(parent,f,d,p,v[6],v[7],v[8],v[9])
            end
        end
        registered[parentnumber] = true
    end
end

function ctx.definesimplegray(name,s)
    return colors.register('color',name,'gray',s) -- we still need to get rid of 'color'
end

function ctx.defineprocesscolor(name,str,global,freeze) -- still inconsistent color vs transparent
    local t = str:split_settings()
    if t then
        if t.h then
            local r, g, b =string.match(t.h .. "000000","(..)(..)(..)")
            ctx.aux.definecolor(name, colors.register('color',name,'rgb',(tonumber(r,16) or 0)/256,(tonumber(g,16) or 0)/256,(tonumber(b,16) or 0)/256               ), global)
        elseif t.r or t.g or t.b then
            ctx.aux.definecolor(name, colors.register('color',name,'rgb', tonumber(t.r)  or 0,      tonumber(t.g)  or 0,      tonumber(t.b)  or 0                    ), global)
        elseif t.c or t.m or t.y or t.k then
            ctx.aux.definecolor(name, colors.register('color',name,'cmyk',tonumber(t.c)  or 0,      tonumber(t.m)  or 0,      tonumber(t.y)  or 0, tonumber(t.k) or 0), global)
        else
            ctx.aux.definecolor(name, colors.register('color',name,'gray',tonumber(t.s)  or 0), global)
        end
        if t.a and t.t then
            ctx.aux.definetransparent(name, transparencies.register(name,transparent[t.a] or tonumber(t.a) or 1,tonumber(t.t) or 1), global)
        elseif ctx.couplecolors then
--~                 ctx.aux.definetransparent(name, transparencies.register(nil, 1, 1), global) -- can be sped up
            ctx.aux.definetransparent(name, 0, global) -- can be sped up
        end
    elseif freeze then
        local ca = attributes.list[attributes.numbers['color']]       [str]
        local ta = attributes.list[attributes.numbers['transparency']][str]
        if ca then
            ctx.aux.definecolor(name, ca, global)
        end
        if ta then
            ctx.aux.definetransparent(name, ta, global)
        end
    else
        ctx.aux.inheritcolor(name, str, global)
        ctx.aux.inherittransparent(name, str, global)
    end
end

function ctx.definespotcolor(name,parent,str,global)
    if parent == "" or parent:find("=") then
        ctx.registerspotcolor(name, parent)
    elseif name ~= parent then
        local cp = attributes.list[attributes.numbers['color']][parent]
        if cp then
            local t = str:split_settings()
            if t then
                t.p = tonumber(t.p) or 1
                registerspotcolor(parent, name, cp, t.e, 1, "", t.p) -- p not really needed, only diagnostics
                if name and name ~= "" then
                    ctx.aux.definecolor(name, colors.register('color',name,'spot', parent, 1, "", t.p), true)
                    if t.a and t.t then
                        ctx.aux.definetransparent(name, transparencies.register(name,transparent[t.a] or tonumber(t.a) or 1,tonumber(t.t) or 1), global)
                    elseif ctx.couplecolors then
                    --~ ctx.aux.definetransparent(name, transparencies.register(nil, 1, 1), global) -- can be sped up
                        ctx.aux.definetransparent(name, 0, global) -- can be sped up
                    end
                end
            end
        end
    end
end

function ctx.registerspotcolor(parent, str)
    local cp = attributes.list[attributes.numbers['color']][parent]
    if cp then
        local e = ""
        if str then
            local t = str:split_settings()
            e = (t and t.e) or ""
        end
        registerspotcolor(parent, "dummy", cp, e, 1, "", 1) -- p not really needed, only diagnostics
    end
end

function ctx.definemultitonecolor(name,multispec,colorspec,selfspec)
    local dd, pp, nn = { }, { }, { }
    for k,v in multispec:gmatch("(%a+)=([^%,]*)") do
        dd[#dd+1] = k
        pp[#pp+1] = v
        nn[#nn+1] = k
        nn[#nn+1] = format("%1.3g",tonumber(v))
    end
--~ v = tonumber(v) * p
    local nof = #dd
    if nof > 0 then
        dd, pp, nn = concat(dd,','), concat(pp,','), concat(nn,'_')
        local parent = (nn:lower()):gsub("[^%d%a%.]+","_")
        ctx.defineprocesscolor(parent,colorspec..","..selfspec,true,true)
        local cp = attributes.list[attributes.numbers['color']][parent]
        if cp then
            registerspotcolor     (parent, name, cp, "", nof, dd, pp)
            registermultitonecolor(parent, name, cp, "", nof, dd, pp)
            ctx.aux.definecolor(name, colors.register('color', name, 'spot', parent, nof, dd, pp), true)
            local t = selfspec:split_settings()
            if t and t.a and t.t then
                ctx.aux.definetransparent(name, transparencies.register(name,transparent[t.a] or tonumber(t.a) or 1,tonumber(t.t) or 1), global)
            elseif ctx.couplecolors then
            --  ctx.aux.definetransparent(name, transparencies.register(nil, 1, 1), global) -- can be sped up
                ctx.aux.definetransparent(name, 0, global) -- can be sped up
            end
        end
    end
end

function ctx.mpcolor(model,ca,ta,default)
    local cv = colors.value(ca) -- faster when direct colors.values[ca]
    if cv then
        local tv = transparencies.value(ta)
        if model == 1 then
            model = cv[1]
        end
        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 ctx.formatcolor(ca,separator)
    local cv = colors.value(ca)
    if cv then
        local model = cv[1]
        if model == 2 then
            return tostring(cv[2])
        elseif model == 3 then
            return concat(cv,separator,3,5)
        elseif model == 4 then
            return concat(cv,separator,6,9)
        else
            return tostring(cv[13])
        end
    else
        return tostring(0)
    end
end

function ctx.formatgray(ca,separator)
    local cv = colors.value(ca)
    if cv then
        return tostring(cv[2])
    else
        return tostring(0)
    end
end

function ctx.colorcomponents(ca)
    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 ctx.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 ctx.pdfcolor(model,ca,default) -- todo: use gray when no color
    local cv = colors.value(ca)
    if cv then
        if model == 1 then
            model = cv[1]
        end
        if model == 2 then
            local s = cv[2]
            return format("%s g %s G",s,s)
        elseif model == 3 then
            local r, g, b = cv[3], cv[4], cv[5]
            return format("%s %s %s rg %s %s %s RG",r,g,b,r,g,b)
        elseif model == 4 then
            local c, m, y, k = cv[6],cv[7],cv[8],cv[9]
            return format("%s %s %s %s k %s %s %s %s K",c,m,y,k,c,m,y,k)
        else
            local n,f,d,p = cv[10],cv[11],cv[12],cv[13]
            if type(p) == "string" then
                p = p:gsub(","," ") -- brr misuse of spot
            end
            return format("/%s cs /%s CS %s SCN %s scn",n,n,p,p)
        end
    else
        return format("%s g %s G",default or 0,default or 0)
    end
end

function ctx.pdfcolorvalue(model,ca,default)
    local cv = colors.value(ca)
    if cv then
        if model == 1 then
            model = cv[1]
        end
        if model == 2 then
            return format("%s",cv[2])
        elseif model == 3 then
            return format("%s %s %s",cv[3],cv[4],cv[5])
        elseif model == 4 then
            return format("%s %s %s %s",cv[6],cv[7],cv[8],cv[9])
        else
            return format("%s",cv[13])
        end
    else
        return format("%s",default or 0)
    end
end

function ctx.fdfcolor(model,ca,default)
    local cv = colors.value(ca)
    if cv then
        if model == 1 then
            model = cv[1]
        end
        if model == 2 then
            return format("[%s]",cv[2])
        elseif model == 3 then
            return format("[%s %s %s]",cv[3],cv[4],cv[5])
        elseif model == 4 then
            return format("[%s %s %s %s]",cv[6],cv[7],cv[8],cv[9])
        elseif model == 4 then
            return format("[%s]",cv[13])
        end
    else
        return format("[%s]",default or 0)
    end
end

function ctx.pdfcolorspace(model,ca)
    local cv = colors.value(ca)
    if cv then
        if model == 1 then
            model = cv[1]
        end
        if model == 2 then
            return "DeviceGray"
        elseif model == 3 then
            return "DeviceRGB"
        elseif model == 4 then
            return "DeviceCMYK"
        end
    end
    return "DeviceGRAY"
end

function ctx.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 ctx.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

-- unfortunately we have \cs's here but this will go anyway once we have mplib and such

function ctx.resolvempgraycolor(csa,csb,model,s)
    local ca = colors.register('color',nil,'gray',s)
    texsprint(tex.ctxcatcodes,format("\\setxvalue{%s}{%s}",csa,ctx.pdfcolorvalue(model,ca)))
    texsprint(tex.ctxcatcodes,format("\\setxvalue{%s}{%s}",csb,ctx.pdfcolorspace(model,ca)))
end
function ctx.resolvemprgbcolor(csa,csb,model,r,g,b)
    local ca = colors.register('color',nil,'rgb',r,g,b)
    texsprint(tex.ctxcatcodes,format("\\setxvalue{%s}{%s}",csa,ctx.pdfcolorvalue(model,ca)))
    texsprint(tex.ctxcatcodes,format("\\setxvalue{%s}{%s}",csb,ctx.pdfcolorspace(model,ca)))
end
function ctx.resolvempcmykcolor(csa,csb,model,c,m,y,k)
    local ca = colors.register('color',nil,'cmyk',c,m,y,k)
    texsprint(tex.ctxcatcodes,format("\\setxvalue{%s}{%s}",csa,ctx.pdfcolorvalue(model,ca)))
    texsprint(tex.ctxcatcodes,format("\\setxvalue{%s}{%s}",csb,ctx.pdfcolorspace(model,ca)))
end
function ctx.resolvempspotcolor(csa,csb,model,n,f,d,p)
    local ca = colors.register('color',nil,'spot',n,f,d,p)
    texsprint(tex.ctxcatcodes,format("\\setxvalue{%s}{%s}",csa,ctx.pdfcolorvalue(model,ca)))
    texsprint(tex.ctxcatcodes,format("\\setxvalue{%s}{%s}",csb,ctx.pdfcolorspace(model,ca)))
end

-- literals needed to inject code in the mp stream, we cannot use attributes there
-- since literals may have qQ's, much may go away once we have mplib code in place

local intransparency = false

function ctx.pdfrgbliteral(model,r,g,b)
    texsprint(tex.ctxcatcodes,format("\\pdfliteral{%s}",ctx.pdfcolor(model,colors.register('color',nil,'rgb',r,g,b))))
end
function ctx.pdfcmykliteral(model,c,m,y,k)
    texsprint(tex.ctxcatcodes,format("\\pdfliteral{%s}",ctx.pdfcolor(model,colors.register('color',nil,'cmyk',c,m,y,k))))
end
function ctx.pdfgrayliteral(model,s)
    texsprint(tex.ctxcatcodes,format("\\pdfliteral{%s}",ctx.pdfcolor(model,colors.register('color',nil,'gray',s))))
end
function ctx.pdfspotliteral(model,n,f,d,p)
    texsprint(tex.ctxcatcodes,format("\\pdfliteral{%s}",ctx.pdfcolor(model,colors.register('color',nil,'spot',n,f,d,p)))) -- incorrect
end
function ctx.pdftransparencyliteral(a,t)
    intransparency = true
    texsprint(tex.ctxcatcodes,format("\\pdfliteral{/Tr%s gs}",transparencies.register(nil,a,t)))
end
function ctx.pdffinishtransparency()
    if intransparency then
        intransparency = false
        texsprint(tex.ctxcatcodes,"\\pdfliteral{/Tr0 gs}") -- we happen to know this -)
    end
end