1if not modules then modules = { } end modules ['font-imp-quality'] = {
2 version = 1.001,
3 comment = "companion to font-ini.mkiv and hand-ini.mkiv",
4 author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
5 copyright = "PRAGMA ADE / ConTeXt Development Team",
6 license = "see context related readme files"
7}
8
9if not context then return end
10
11local next, type, tonumber = next, type, tonumber
12
13local fonts = fonts
14local utilities = utilities
15
16local handlers = fonts.handlers
17local otf = handlers.otf
18local afm = handlers.afm
19local registerotffeature = otf.features.register
20local registerafmfeature = afm.features.register
21
22local allocate = utilities.storage.allocate
23local getparameters = utilities.parsers.getparameters
24
25local implement = interfaces and interfaces.implement
26
27local trace_protrusion = false trackers.register("fonts.protrusion", function(v) trace_protrusion = v end)
28local trace_expansion = false trackers.register("fonts.expansion", function(v) trace_expansion = v end)
29
30local report_expansions = logs.reporter("fonts","expansions")
31local report_protrusions = logs.reporter("fonts","protrusions")
32
33
34
35
36
37local function get_class_and_vector(tfmdata,value,where)
38 local g_where = tfmdata.goodies and tfmdata.goodies[where]
39 local f_where = fonts[where]
40 local g_classes = g_where and g_where.classes
41 local f_classes = f_where and f_where.classes
42 local class = (g_classes and g_classes[value]) or (f_classes and f_classes[value])
43 if class then
44 local class_vector = class.vector
45 local g_vectors = g_where and g_where.vectors
46 local f_vectors = f_where and f_where.vectors
47 local vector = (g_vectors and g_vectors[class_vector]) or (f_vectors and f_vectors[class_vector])
48 return class, vector
49 end
50end
51
52
53
54
55
56local expansions = fonts.expansions or allocate()
57
58fonts.expansions = expansions
59
60local classes = expansions.classes or allocate()
61local vectors = expansions.vectors or allocate()
62
63expansions.classes = classes
64expansions.vectors = vectors
65
66classes.preset = {
67
68
69
70 factor = 1,
71}
72
73classes['quality'] = {
74
75
76
77 vector = 'default',
78 factor = 1,
79}
80
81vectors['default'] = {
82 [0x0041] = 0.5,
83 [0x0042] = 0.7,
84 [0x0043] = 0.7,
85 [0x0044] = 0.5,
86 [0x0045] = 0.7,
87 [0x0046] = 0.7,
88 [0x0047] = 0.5,
89 [0x0048] = 0.7,
90 [0x004B] = 0.7,
91 [0x004D] = 0.7,
92 [0x004E] = 0.7,
93 [0x004F] = 0.5,
94 [0x0050] = 0.7,
95 [0x0051] = 0.5,
96 [0x0052] = 0.7,
97 [0x0053] = 0.7,
98 [0x0055] = 0.7,
99 [0x0057] = 0.7,
100 [0x005A] = 0.7,
101 [0x0061] = 0.7,
102 [0x0062] = 0.7,
103 [0x0063] = 0.7,
104 [0x0064] = 0.7,
105 [0x0065] = 0.7,
106 [0x0067] = 0.7,
107 [0x0068] = 0.7,
108 [0x006B] = 0.7,
109 [0x006D] = 0.7,
110 [0x006E] = 0.7,
111 [0x006F] = 0.7,
112 [0x0070] = 0.7,
113 [0x0071] = 0.7,
114 [0x0073] = 0.7,
115 [0x0075] = 0.7,
116 [0x0077] = 0.7,
117 [0x007A] = 0.7,
118 [0x0032] = 0.7,
119 [0x0033] = 0.7,
120 [0x0036] = 0.7,
121 [0x0038] = 0.7,
122 [0x0039] = 0.7,
123}
124
125vectors['quality'] = vectors['default']
126
127
128
129
130local function initialize(tfmdata,value)
131 if value then
132 local class, vector = get_class_and_vector(tfmdata,value,"expansions")
133 if class then
134 if vector then
135
136
137
138 local factor = class.factor or 1
139 if trace_expansion then
140
141 report_expansions("setting class %a, vector %a, factor %a",value,class.vector,factor)
142 end
143 tfmdata.parameters.expansion = {
144
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147 factor = factor,
148 class = class,
149 vector = vector,
150 }
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186
187 elseif trace_expansion then
188 report_expansions("unknown vector %a in class %a",class.vector,value)
189 end
190 elseif trace_expansion then
191 report_expansions("unknown class %a",value)
192 end
193 end
194end
195
196local specification = {
197 name = "expansion",
198 description = "apply hz optimization",
199 initializers = {
200 base = initialize,
201 node = initialize,
202 }
203}
204
205registerotffeature(specification)
206registerafmfeature(specification)
207
208fonts.goodies.register("expansions", function(...) return fonts.goodies.report("expansions", trace_expansion, ...) end)
209
210implement {
211 name = "setupfontexpansion",
212 arguments = "2 strings",
213 actions = function(class,settings) getparameters(classes,class,'preset',settings) end
214}
215
216
217
218classes.math = {
219
220
221
222 vector = 'math',
223 factor = 1,
224}
225
226vectors.math = {
227 [0x002B] = { 4, 0 },
228 [0x2212] = { 4, 0 },
229 [0x003C] = { 8, 0 },
230 [0x003D] = { 8, 0 },
231 [0x003E] = { 8, 0 },
232 [0x002F] = { 2, 0 },
233 [0x0028] = { 2, 0 },
234 [0x0029] = { 2, 0 },
235 [0x005B] = { 2, 0 },
236 [0x005D] = { 2, 0 },
237}
238
239local function initialize(tfmdata,value)
240 if value then
241 local class, vector = get_class_and_vector(tfmdata,value,"expansions")
242 if class then
243 if vector then
244
245
246
247 local factor = class.factor or 1
248 if trace_expansion then
249
250 report_expansions("setting class %a, vector %a, factor %a",value,class.vector,factor)
251 end
252 tfmdata.parameters.expansion = {
253
254
255
256 factor = factor,
257 }
258
259 local characters = tfmdata.characters
260 for u, v in next, vector do
261 local chr = characters[u]
262 if type(v) == "table" then
263 local e = v[1]
264 local c = v[2] or 0
265 if e ~= 0 then
266 chr.expansion = e*factor
267 end
268 if c ~= 0 then
269 chr.compression = c*factor
270 end
271 elseif v ~= 0 then
272 chr.expansion = v*factor
273 end
274 end
275 elseif trace_expansion then
276 report_expansions("unknown vector %a in class %a",class.vector,value)
277 end
278 elseif trace_expansion then
279 report_expansions("unknown class %a",value)
280 end
281 end
282end
283
284registerotffeature {
285 name = "mathexpansion",
286 description = "apply hz optimization to math",
287 initializers = {
288 base = initialize,
289 node = initialize,
290 }
291}
292
293
294
295
296
297fonts.protrusions = allocate()
298local protrusions = fonts.protrusions
299
300protrusions.classes = allocate()
301protrusions.vectors = allocate()
302
303local classes = protrusions.classes
304local vectors = protrusions.vectors
305
306
307
308classes.preset = {
309 factor = 1,
310 left = 1,
311 right = 1,
312}
313
314classes['pure'] = { vector = 'pure', factor = 1 }
315classes['punctuation'] = { vector = 'punctuation', factor = 1 }
316classes['alpha'] = { vector = 'alpha', factor = 1 }
317classes['quality'] = { vector = 'quality', factor = 1 }
318
319vectors['pure'] = {
320
321 [0x002C] = { 0, 1 },
322 [0x002E] = { 0, 1 },
323 [0x003A] = { 0, 1 },
324 [0x003B] = { 0, 1 },
325 [0x002D] = { 0, 1 },
326 [0x00AD] = { 0, 1 },
327 [0x2013] = { 0, 0.50 },
328 [0x2014] = { 0, 0.33 },
329 [0x3001] = { 0, 1 },
330 [0x3002] = { 0, 1 },
331 [0x060C] = { 0, 1 },
332 [0x061B] = { 0, 1 },
333 [0x06D4] = { 0, 1 },
334
335}
336
337vectors['punctuation'] = {
338
339 [0x003F] = { 0, 0.20 },
340 [0x00BF] = { 0.20, 0 },
341 [0x0021] = { 0, 0.20 },
342 [0x00A1] = { 0.20, 0, },
343 [0x0028] = { 0.05, 0 },
344 [0x0029] = { 0, 0.05 },
345 [0x005B] = { 0.05, 0 },
346 [0x005D] = { 0, 0.05 },
347 [0x002C] = { 0, 0.70 },
348 [0x002E] = { 0, 0.70 },
349 [0x003A] = { 0, 0.50 },
350 [0x003B] = { 0, 0.50 },
351 [0x002D] = { 0, 0.70 },
352 [0x00AD] = { 0, 0.70 },
353 [0x2013] = { 0, 0.30 },
354 [0x2014] = { 0, 0.20 },
355 [0x060C] = { 0, 0.70 },
356 [0x061B] = { 0, 0.50 },
357 [0x06D4] = { 0, 0.70 },
358 [0x061F] = { 0, 0.20 },
359
360
361
362 [0x2039] = { 0.70, 0.70 },
363 [0x203A] = { 0.70, 0.70 },
364 [0x00AB] = { 0.50, 0.50 },
365 [0x00BB] = { 0.50, 0.50 },
366
367 [0x2018] = { 0.70, 0.70 },
368 [0x2019] = { 0, 0.70 },
369 [0x201A] = { 0.70, 0 },
370 [0x201B] = { 0.70, 0 },
371 [0x201C] = { 0.50, 0.50 },
372 [0x201D] = { 0, 0.50 },
373 [0x201E] = { 0.50, 0 },
374 [0x201F] = { 0.50, 0 },
375
376}
377
378vectors['alpha'] = {
379
380 [0x0041] = { .05, .05 },
381 [0x0046] = { 0, .05 },
382 [0x004A] = { .05, 0 },
383 [0x004B] = { 0, .05 },
384 [0x004C] = { 0, .05 },
385 [0x0054] = { .05, .05 },
386 [0x0056] = { .05, .05 },
387 [0x0057] = { .05, .05 },
388 [0x0058] = { .05, .05 },
389 [0x0059] = { .05, .05 },
390
391 [0x006B] = { 0, .05 },
392 [0x0072] = { 0, .05 },
393 [0x0074] = { 0, .05 },
394 [0x0076] = { .05, .05 },
395 [0x0077] = { .05, .05 },
396 [0x0078] = { .05, .05 },
397 [0x0079] = { .05, .05 },
398
399}
400
401vectors['quality'] = table.merged(
402 vectors['punctuation'],
403 vectors['alpha']
404)
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553local function initialize(tfmdata,value)
554 if value then
555
556
557
558
559
560 local class, vector = get_class_and_vector(tfmdata,value,"protrusions")
561 if class then
562 if vector then
563 local factor = class.factor or 1
564 local left = class.left or 1
565 local right = class.right or 1
566 if trace_protrusion then
567 report_protrusions("setting class %a, vector %a, factor %a, left %a, right %a",
568 value,class.vector,factor,left,right)
569 end
570 local data = characters.data
571 local lfactor = left * factor
572 local rfactor = right * factor
573 if trace_protrusion then
574 report_protrusions("left factor %0.3F, right factor %0.3F",lfactor,rfactor)
575 end
576 tfmdata.parameters.protrusion = {
577 factor = factor,
578 left = left,
579 right = right,
580 class = class,
581 vector = vector,
582 }
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625 elseif trace_protrusion then
626 report_protrusions("unknown vector %a in class %a",class.vector,value)
627 end
628 elseif trace_protrusion then
629 report_protrusions("unknown class %a",value)
630 end
631
632 end
633end
634
635local specification = {
636 name = "protrusion",
637 description = "l/r margin character protrusion",
638 initializers = {
639 base = initialize,
640 node = initialize,
641 }
642}
643
644registerotffeature(specification)
645registerafmfeature(specification)
646
647fonts.goodies.register("protrusions", function(...) return fonts.goodies.report("protrusions", trace_protrusion, ...) end)
648
649implement {
650 name = "setupfontprotrusion",
651 arguments = "2 strings",
652 actions = function(class,settings) getparameters(classes,class,'preset',settings) end
653}
654
655local function initialize(tfmdata,value)
656 local properties = tfmdata.properties
657 local parameters = tfmdata.parameters
658 if properties then
659 value = tonumber(value)
660 if value then
661 if value < 0 then
662 value = 0
663 elseif value > 10 then
664 report_expansions("threshold for %a @ %p limited to 10 pct",properties.fontname,parameters.size)
665 value = 10
666 end
667 if value > 5 then
668 report_expansions("threshold for %a @ %p exceeds 5 pct",properties.fontname,parameters.size)
669 end
670 end
671 properties.threshold = value or nil
672 end
673end
674
675local specification = {
676 name = "threshold",
677 description = "threshold for quality features",
678 initializers = {
679 base = initialize,
680 node = initialize,
681 }
682}
683
684registerotffeature(specification)
685registerafmfeature(specification)
686
687
688
689local function addquality(id)
690 local tfmdata = fonts.hashes.identifiers[id]
691 if tfmdata then
692 local expansion = tfmdata.parameters.expansion
693 if expansion then
694 local class = expansion.class
695 local vector = expansion.vector
696 if class and vector then
697
698
699
700 local factor = class.factor or 1
701 local data = characters and characters.data
702 for i, chr in next, tfmdata.characters do
703 local v = vector[i]
704 if data and not v then
705 local d = data[i]
706 if d then
707 local s = d.shcode
708 if not s then
709
710 elseif type(s) == "table" then
711 v = ((vector[s[1]] or 0) + (vector[s[#s]] or 0)) / 2
712 else
713 v = vector[s] or 0
714 end
715 end
716 end
717
718 if v then
719 if type(v) == "table" then
720 local e = v[1]
721 local c = v[2] or 0
722 if e ~= 0 then
723 chr.expansion = e * factor * 1000
724 end
725 if c ~= 0 then
726 chr.compression = c * factor * 1000
727 end
728 elseif v == 0 then
729
730 else
731 chr.expansion = v * factor * 1000
732 end
733 elseif factor ~= 1 then
734 chr.expansion = factor * 1000
735 end
736 end
737 end
738 end
739
740 local protrusion = tfmdata.parameters.protrusion
741 if protrusion then
742 local class = protrusion.class
743 local vector = protrusion.vector
744 if class and vector then
745 local factor = class.factor or 1
746 local left = class.left or 1
747 local right = class.right or 1
748 local data = characters.data
749 local lfactor = left * factor
750 local rfactor = right * factor
751 for i, chr in next, tfmdata.characters do
752 local v = vector[i]
753 local pl = nil
754 local pr = nil
755 if v then
756 pl = v[1]
757 pr = v[2]
758 else
759 local d = data[i]
760 if d then
761 local s = d.shcode
762 if not s then
763
764 elseif type(s) == "table" then
765 local vl = vector[s[1]]
766 local vr = vector[s[#s]]
767 if vl then pl = vl[1] end
768 if vr then pr = vr[2] end
769 else
770 v = vector[s]
771 if v then
772 pl = v[1]
773 pr = v[2]
774 end
775 end
776 end
777 end
778 if pl and pl ~= 0 then
779 pl = pl * lfactor * chr.width
780 if trace_protrusion then
781 report_protrusions("left -> %0.3F %C ",pl,i)
782 end
783 chr.leftprotrusion = pl
784 end
785 if pr and pr ~= 0 then
786 pr = pr * rfactor * chr.width
787 chr.rightprotrusion = pr
788 if trace_protrusion then
789 report_protrusions("right -> %0.3F %C",pr,i)
790 end
791 end
792 end
793 end
794 end
795
796 if expansion or protrusion then
797 font.addquality(id,tfmdata)
798 end
799 end
800end
801
802callback.register("quality_font",addquality)
803 |
