1 | /* |
2 | * Copyright © 2007,2008,2009 Red Hat, Inc. |
3 | * Copyright © 2010,2011,2012 Google, Inc. |
4 | * |
5 | * This is part of HarfBuzz, a text shaping library. |
6 | * |
7 | * Permission is hereby granted, without written agreement and without |
8 | * license or royalty fees, to use, copy, modify, and distribute this |
9 | * software and its documentation for any purpose, provided that the |
10 | * above copyright notice and the following two paragraphs appear in |
11 | * all copies of this software. |
12 | * |
13 | * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR |
14 | * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES |
15 | * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN |
16 | * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH |
17 | * DAMAGE. |
18 | * |
19 | * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, |
20 | * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
21 | * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS |
22 | * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO |
23 | * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
24 | * |
25 | * Red Hat Author(s): Behdad Esfahbod |
26 | * Google Author(s): Behdad Esfahbod |
27 | */ |
28 | |
29 | #ifndef OT_LAYOUT_GDEF_GDEF_HH |
30 | #define OT_LAYOUT_GDEF_GDEF_HH |
31 | |
32 | #include "../../../hb-ot-layout-common.hh" |
33 | |
34 | #include "../../../hb-font.hh" |
35 | #include "../../../hb-cache.hh" |
36 | |
37 | |
38 | namespace OT { |
39 | |
40 | |
41 | /* |
42 | * Attachment List Table |
43 | */ |
44 | |
45 | /* Array of contour point indices--in increasing numerical order */ |
46 | struct AttachPoint : Array16Of<HBUINT16> |
47 | { |
48 | bool subset (hb_subset_context_t *c) const |
49 | { |
50 | TRACE_SUBSET (this); |
51 | auto *out = c->serializer->start_embed (*this); |
52 | return_trace (out->serialize (c->serializer, + iter ())); |
53 | } |
54 | }; |
55 | |
56 | struct AttachList |
57 | { |
58 | unsigned int get_attach_points (hb_codepoint_t glyph_id, |
59 | unsigned int start_offset, |
60 | unsigned int *point_count /* IN/OUT */, |
61 | unsigned int *point_array /* OUT */) const |
62 | { |
63 | unsigned int index = (this+coverage).get_coverage (glyph_id); |
64 | if (index == NOT_COVERED) |
65 | { |
66 | if (point_count) |
67 | *point_count = 0; |
68 | return 0; |
69 | } |
70 | |
71 | const AttachPoint &points = this+attachPoint[index]; |
72 | |
73 | if (point_count) |
74 | { |
75 | + points.as_array ().sub_array (start_offset, point_count) |
76 | | hb_sink (hb_array (point_array, *point_count)) |
77 | ; |
78 | } |
79 | |
80 | return points.len; |
81 | } |
82 | |
83 | bool subset (hb_subset_context_t *c) const |
84 | { |
85 | TRACE_SUBSET (this); |
86 | const hb_set_t &glyphset = *c->plan->glyphset_gsub (); |
87 | const hb_map_t &glyph_map = *c->plan->glyph_map; |
88 | |
89 | auto *out = c->serializer->start_embed (*this); |
90 | if (unlikely (!c->serializer->extend_min (out))) return_trace (false); |
91 | |
92 | hb_sorted_vector_t<hb_codepoint_t> new_coverage; |
93 | + hb_zip (this+coverage, attachPoint) |
94 | | hb_filter (glyphset, hb_first) |
95 | | hb_filter (subset_offset_array (c, out->attachPoint, this), hb_second) |
96 | | hb_map (hb_first) |
97 | | hb_map (glyph_map) |
98 | | hb_sink (new_coverage) |
99 | ; |
100 | out->coverage.serialize_serialize (c->serializer, new_coverage.iter ()); |
101 | return_trace (bool (new_coverage)); |
102 | } |
103 | |
104 | bool sanitize (hb_sanitize_context_t *c) const |
105 | { |
106 | TRACE_SANITIZE (this); |
107 | return_trace (coverage.sanitize (c, this) && attachPoint.sanitize (c, this)); |
108 | } |
109 | |
110 | protected: |
111 | Offset16To<Coverage> |
112 | coverage; /* Offset to Coverage table -- from |
113 | * beginning of AttachList table */ |
114 | Array16OfOffset16To<AttachPoint> |
115 | attachPoint; /* Array of AttachPoint tables |
116 | * in Coverage Index order */ |
117 | public: |
118 | DEFINE_SIZE_ARRAY (4, attachPoint); |
119 | }; |
120 | |
121 | /* |
122 | * Ligature Caret Table |
123 | */ |
124 | |
125 | struct CaretValueFormat1 |
126 | { |
127 | friend struct CaretValue; |
128 | bool subset (hb_subset_context_t *c) const |
129 | { |
130 | TRACE_SUBSET (this); |
131 | auto *out = c->serializer->embed (this); |
132 | if (unlikely (!out)) return_trace (false); |
133 | return_trace (true); |
134 | } |
135 | |
136 | private: |
137 | hb_position_t get_caret_value (hb_font_t *font, hb_direction_t direction) const |
138 | { |
139 | return HB_DIRECTION_IS_HORIZONTAL (direction) ? font->em_scale_x (coordinate) : font->em_scale_y (coordinate); |
140 | } |
141 | |
142 | bool sanitize (hb_sanitize_context_t *c) const |
143 | { |
144 | TRACE_SANITIZE (this); |
145 | return_trace (c->check_struct (this)); |
146 | } |
147 | |
148 | protected: |
149 | HBUINT16 caretValueFormat; /* Format identifier--format = 1 */ |
150 | FWORD coordinate; /* X or Y value, in design units */ |
151 | public: |
152 | DEFINE_SIZE_STATIC (4); |
153 | }; |
154 | |
155 | struct CaretValueFormat2 |
156 | { |
157 | friend struct CaretValue; |
158 | bool subset (hb_subset_context_t *c) const |
159 | { |
160 | TRACE_SUBSET (this); |
161 | auto *out = c->serializer->embed (this); |
162 | if (unlikely (!out)) return_trace (false); |
163 | return_trace (true); |
164 | } |
165 | |
166 | private: |
167 | hb_position_t get_caret_value (hb_font_t *font, hb_direction_t direction, hb_codepoint_t glyph_id) const |
168 | { |
169 | hb_position_t x, y; |
170 | font->get_glyph_contour_point_for_origin (glyph_id, caretValuePoint, direction, &x, &y); |
171 | return HB_DIRECTION_IS_HORIZONTAL (direction) ? x : y; |
172 | } |
173 | |
174 | bool sanitize (hb_sanitize_context_t *c) const |
175 | { |
176 | TRACE_SANITIZE (this); |
177 | return_trace (c->check_struct (this)); |
178 | } |
179 | |
180 | protected: |
181 | HBUINT16 caretValueFormat; /* Format identifier--format = 2 */ |
182 | HBUINT16 caretValuePoint; /* Contour point index on glyph */ |
183 | public: |
184 | DEFINE_SIZE_STATIC (4); |
185 | }; |
186 | |
187 | struct CaretValueFormat3 |
188 | { |
189 | friend struct CaretValue; |
190 | |
191 | hb_position_t get_caret_value (hb_font_t *font, hb_direction_t direction, |
192 | const VariationStore &var_store) const |
193 | { |
194 | return HB_DIRECTION_IS_HORIZONTAL (direction) ? |
195 | font->em_scale_x (coordinate) + (this+deviceTable).get_x_delta (font, var_store) : |
196 | font->em_scale_y (coordinate) + (this+deviceTable).get_y_delta (font, var_store); |
197 | } |
198 | |
199 | bool subset (hb_subset_context_t *c) const |
200 | { |
201 | TRACE_SUBSET (this); |
202 | auto *out = c->serializer->start_embed (*this); |
203 | if (!c->serializer->embed (caretValueFormat)) return_trace (false); |
204 | if (!c->serializer->embed (coordinate)) return_trace (false); |
205 | |
206 | unsigned varidx = (this+deviceTable).get_variation_index (); |
207 | if (c->plan->layout_variation_idx_delta_map.has (varidx)) |
208 | { |
209 | int delta = hb_second (c->plan->layout_variation_idx_delta_map.get (varidx)); |
210 | if (delta != 0) |
211 | { |
212 | if (!c->serializer->check_assign (out->coordinate, coordinate + delta, HB_SERIALIZE_ERROR_INT_OVERFLOW)) |
213 | return_trace (false); |
214 | } |
215 | } |
216 | |
217 | if (c->plan->all_axes_pinned) |
218 | return_trace (c->serializer->check_assign (out->caretValueFormat, 1, HB_SERIALIZE_ERROR_INT_OVERFLOW)); |
219 | |
220 | if (!c->serializer->embed (deviceTable)) |
221 | return_trace (false); |
222 | |
223 | return_trace (out->deviceTable.serialize_copy (c->serializer, deviceTable, this, c->serializer->to_bias (out), |
224 | hb_serialize_context_t::Head, &c->plan->layout_variation_idx_delta_map)); |
225 | } |
226 | |
227 | void collect_variation_indices (hb_collect_variation_indices_context_t *c) const |
228 | { (this+deviceTable).collect_variation_indices (c); } |
229 | |
230 | bool sanitize (hb_sanitize_context_t *c) const |
231 | { |
232 | TRACE_SANITIZE (this); |
233 | return_trace (c->check_struct (this) && deviceTable.sanitize (c, this)); |
234 | } |
235 | |
236 | protected: |
237 | HBUINT16 caretValueFormat; /* Format identifier--format = 3 */ |
238 | FWORD coordinate; /* X or Y value, in design units */ |
239 | Offset16To<Device> |
240 | deviceTable; /* Offset to Device table for X or Y |
241 | * value--from beginning of CaretValue |
242 | * table */ |
243 | public: |
244 | DEFINE_SIZE_STATIC (6); |
245 | }; |
246 | |
247 | struct CaretValue |
248 | { |
249 | hb_position_t get_caret_value (hb_font_t *font, |
250 | hb_direction_t direction, |
251 | hb_codepoint_t glyph_id, |
252 | const VariationStore &var_store) const |
253 | { |
254 | switch (u.format) { |
255 | case 1: return u.format1.get_caret_value (font, direction); |
256 | case 2: return u.format2.get_caret_value (font, direction, glyph_id); |
257 | case 3: return u.format3.get_caret_value (font, direction, var_store); |
258 | default:return 0; |
259 | } |
260 | } |
261 | |
262 | template <typename context_t, typename ...Ts> |
263 | typename context_t::return_t dispatch (context_t *c, Ts&&... ds) const |
264 | { |
265 | if (unlikely (!c->may_dispatch (this, &u.format))) return c->no_dispatch_return_value (); |
266 | TRACE_DISPATCH (this, u.format); |
267 | switch (u.format) { |
268 | case 1: return_trace (c->dispatch (u.format1, std::forward<Ts> (ds)...)); |
269 | case 2: return_trace (c->dispatch (u.format2, std::forward<Ts> (ds)...)); |
270 | case 3: return_trace (c->dispatch (u.format3, std::forward<Ts> (ds)...)); |
271 | default:return_trace (c->default_return_value ()); |
272 | } |
273 | } |
274 | |
275 | void collect_variation_indices (hb_collect_variation_indices_context_t *c) const |
276 | { |
277 | switch (u.format) { |
278 | case 1: |
279 | case 2: |
280 | return; |
281 | case 3: |
282 | u.format3.collect_variation_indices (c); |
283 | return; |
284 | default: return; |
285 | } |
286 | } |
287 | |
288 | bool sanitize (hb_sanitize_context_t *c) const |
289 | { |
290 | TRACE_SANITIZE (this); |
291 | if (!u.format.sanitize (c)) return_trace (false); |
292 | switch (u.format) { |
293 | case 1: return_trace (u.format1.sanitize (c)); |
294 | case 2: return_trace (u.format2.sanitize (c)); |
295 | case 3: return_trace (u.format3.sanitize (c)); |
296 | default:return_trace (true); |
297 | } |
298 | } |
299 | |
300 | protected: |
301 | union { |
302 | HBUINT16 format; /* Format identifier */ |
303 | CaretValueFormat1 format1; |
304 | CaretValueFormat2 format2; |
305 | CaretValueFormat3 format3; |
306 | } u; |
307 | public: |
308 | DEFINE_SIZE_UNION (2, format); |
309 | }; |
310 | |
311 | struct LigGlyph |
312 | { |
313 | unsigned get_lig_carets (hb_font_t *font, |
314 | hb_direction_t direction, |
315 | hb_codepoint_t glyph_id, |
316 | const VariationStore &var_store, |
317 | unsigned start_offset, |
318 | unsigned *caret_count /* IN/OUT */, |
319 | hb_position_t *caret_array /* OUT */) const |
320 | { |
321 | if (caret_count) |
322 | { |
323 | + carets.as_array ().sub_array (start_offset, caret_count) |
324 | | hb_map (hb_add (this)) |
325 | | hb_map ([&] (const CaretValue &value) { return value.get_caret_value (font, direction, glyph_id, var_store); }) |
326 | | hb_sink (hb_array (caret_array, *caret_count)) |
327 | ; |
328 | } |
329 | |
330 | return carets.len; |
331 | } |
332 | |
333 | bool subset (hb_subset_context_t *c) const |
334 | { |
335 | TRACE_SUBSET (this); |
336 | auto *out = c->serializer->start_embed (*this); |
337 | if (unlikely (!c->serializer->extend_min (out))) return_trace (false); |
338 | |
339 | + hb_iter (carets) |
340 | | hb_apply (subset_offset_array (c, out->carets, this)) |
341 | ; |
342 | |
343 | return_trace (bool (out->carets)); |
344 | } |
345 | |
346 | void collect_variation_indices (hb_collect_variation_indices_context_t *c) const |
347 | { |
348 | for (const Offset16To<CaretValue>& offset : carets.iter ()) |
349 | (this+offset).collect_variation_indices (c); |
350 | } |
351 | |
352 | bool sanitize (hb_sanitize_context_t *c) const |
353 | { |
354 | TRACE_SANITIZE (this); |
355 | return_trace (carets.sanitize (c, this)); |
356 | } |
357 | |
358 | protected: |
359 | Array16OfOffset16To<CaretValue> |
360 | carets; /* Offset array of CaretValue tables |
361 | * --from beginning of LigGlyph table |
362 | * --in increasing coordinate order */ |
363 | public: |
364 | DEFINE_SIZE_ARRAY (2, carets); |
365 | }; |
366 | |
367 | struct LigCaretList |
368 | { |
369 | unsigned int get_lig_carets (hb_font_t *font, |
370 | hb_direction_t direction, |
371 | hb_codepoint_t glyph_id, |
372 | const VariationStore &var_store, |
373 | unsigned int start_offset, |
374 | unsigned int *caret_count /* IN/OUT */, |
375 | hb_position_t *caret_array /* OUT */) const |
376 | { |
377 | unsigned int index = (this+coverage).get_coverage (glyph_id); |
378 | if (index == NOT_COVERED) |
379 | { |
380 | if (caret_count) |
381 | *caret_count = 0; |
382 | return 0; |
383 | } |
384 | const LigGlyph &lig_glyph = this+ligGlyph[index]; |
385 | return lig_glyph.get_lig_carets (font, direction, glyph_id, var_store, start_offset, caret_count, caret_array); |
386 | } |
387 | |
388 | bool subset (hb_subset_context_t *c) const |
389 | { |
390 | TRACE_SUBSET (this); |
391 | const hb_set_t &glyphset = *c->plan->glyphset_gsub (); |
392 | const hb_map_t &glyph_map = *c->plan->glyph_map; |
393 | |
394 | auto *out = c->serializer->start_embed (*this); |
395 | if (unlikely (!c->serializer->extend_min (out))) return_trace (false); |
396 | |
397 | hb_sorted_vector_t<hb_codepoint_t> new_coverage; |
398 | + hb_zip (this+coverage, ligGlyph) |
399 | | hb_filter (glyphset, hb_first) |
400 | | hb_filter (subset_offset_array (c, out->ligGlyph, this), hb_second) |
401 | | hb_map (hb_first) |
402 | | hb_map (glyph_map) |
403 | | hb_sink (new_coverage) |
404 | ; |
405 | out->coverage.serialize_serialize (c->serializer, new_coverage.iter ()); |
406 | return_trace (bool (new_coverage)); |
407 | } |
408 | |
409 | void collect_variation_indices (hb_collect_variation_indices_context_t *c) const |
410 | { |
411 | + hb_zip (this+coverage, ligGlyph) |
412 | | hb_filter (c->glyph_set, hb_first) |
413 | | hb_map (hb_second) |
414 | | hb_map (hb_add (this)) |
415 | | hb_apply ([c] (const LigGlyph& _) { _.collect_variation_indices (c); }) |
416 | ; |
417 | } |
418 | |
419 | bool sanitize (hb_sanitize_context_t *c) const |
420 | { |
421 | TRACE_SANITIZE (this); |
422 | return_trace (coverage.sanitize (c, this) && ligGlyph.sanitize (c, this)); |
423 | } |
424 | |
425 | protected: |
426 | Offset16To<Coverage> |
427 | coverage; /* Offset to Coverage table--from |
428 | * beginning of LigCaretList table */ |
429 | Array16OfOffset16To<LigGlyph> |
430 | ligGlyph; /* Array of LigGlyph tables |
431 | * in Coverage Index order */ |
432 | public: |
433 | DEFINE_SIZE_ARRAY (4, ligGlyph); |
434 | }; |
435 | |
436 | |
437 | struct MarkGlyphSetsFormat1 |
438 | { |
439 | bool covers (unsigned int set_index, hb_codepoint_t glyph_id) const |
440 | { return (this+coverage[set_index]).get_coverage (glyph_id) != NOT_COVERED; } |
441 | |
442 | template <typename set_t> |
443 | void collect_coverage (hb_vector_t<set_t> &sets) const |
444 | { |
445 | for (const auto &offset : coverage) |
446 | { |
447 | const auto &cov = this+offset; |
448 | cov.collect_coverage (sets.push ()); |
449 | } |
450 | } |
451 | |
452 | bool subset (hb_subset_context_t *c) const |
453 | { |
454 | TRACE_SUBSET (this); |
455 | auto *out = c->serializer->start_embed (*this); |
456 | if (unlikely (!c->serializer->extend_min (out))) return_trace (false); |
457 | out->format = format; |
458 | |
459 | bool ret = true; |
460 | for (const Offset32To<Coverage>& offset : coverage.iter ()) |
461 | { |
462 | auto *o = out->coverage.serialize_append (c->serializer); |
463 | if (unlikely (!o)) |
464 | { |
465 | ret = false; |
466 | break; |
467 | } |
468 | |
469 | //not using o->serialize_subset (c, offset, this, out) here because |
470 | //OTS doesn't allow null offset. |
471 | //See issue: https://github.com/khaledhosny/ots/issues/172 |
472 | c->serializer->push (); |
473 | c->dispatch (this+offset); |
474 | c->serializer->add_link (*o, c->serializer->pop_pack ()); |
475 | } |
476 | |
477 | return_trace (ret && out->coverage.len); |
478 | } |
479 | |
480 | bool sanitize (hb_sanitize_context_t *c) const |
481 | { |
482 | TRACE_SANITIZE (this); |
483 | return_trace (coverage.sanitize (c, this)); |
484 | } |
485 | |
486 | protected: |
487 | HBUINT16 format; /* Format identifier--format = 1 */ |
488 | Array16Of<Offset32To<Coverage>> |
489 | coverage; /* Array of long offsets to mark set |
490 | * coverage tables */ |
491 | public: |
492 | DEFINE_SIZE_ARRAY (4, coverage); |
493 | }; |
494 | |
495 | struct MarkGlyphSets |
496 | { |
497 | bool covers (unsigned int set_index, hb_codepoint_t glyph_id) const |
498 | { |
499 | switch (u.format) { |
500 | case 1: return u.format1.covers (set_index, glyph_id); |
501 | default:return false; |
502 | } |
503 | } |
504 | |
505 | template <typename set_t> |
506 | void collect_coverage (hb_vector_t<set_t> &sets) const |
507 | { |
508 | switch (u.format) { |
509 | case 1: u.format1.collect_coverage (sets); return; |
510 | default:return; |
511 | } |
512 | } |
513 | |
514 | bool subset (hb_subset_context_t *c) const |
515 | { |
516 | TRACE_SUBSET (this); |
517 | switch (u.format) { |
518 | case 1: return_trace (u.format1.subset (c)); |
519 | default:return_trace (false); |
520 | } |
521 | } |
522 | |
523 | bool sanitize (hb_sanitize_context_t *c) const |
524 | { |
525 | TRACE_SANITIZE (this); |
526 | if (!u.format.sanitize (c)) return_trace (false); |
527 | switch (u.format) { |
528 | case 1: return_trace (u.format1.sanitize (c)); |
529 | default:return_trace (true); |
530 | } |
531 | } |
532 | |
533 | protected: |
534 | union { |
535 | HBUINT16 format; /* Format identifier */ |
536 | MarkGlyphSetsFormat1 format1; |
537 | } u; |
538 | public: |
539 | DEFINE_SIZE_UNION (2, format); |
540 | }; |
541 | |
542 | |
543 | /* |
544 | * GDEF -- Glyph Definition |
545 | * https://docs.microsoft.com/en-us/typography/opentype/spec/gdef |
546 | */ |
547 | |
548 | |
549 | template <typename Types> |
550 | struct GDEFVersion1_2 |
551 | { |
552 | friend struct GDEF; |
553 | |
554 | protected: |
555 | FixedVersion<>version; /* Version of the GDEF table--currently |
556 | * 0x00010003u */ |
557 | typename Types::template OffsetTo<ClassDef> |
558 | glyphClassDef; /* Offset to class definition table |
559 | * for glyph type--from beginning of |
560 | * GDEF header (may be Null) */ |
561 | typename Types::template OffsetTo<AttachList> |
562 | attachList; /* Offset to list of glyphs with |
563 | * attachment points--from beginning |
564 | * of GDEF header (may be Null) */ |
565 | typename Types::template OffsetTo<LigCaretList> |
566 | ligCaretList; /* Offset to list of positioning points |
567 | * for ligature carets--from beginning |
568 | * of GDEF header (may be Null) */ |
569 | typename Types::template OffsetTo<ClassDef> |
570 | markAttachClassDef; /* Offset to class definition table for |
571 | * mark attachment type--from beginning |
572 | * of GDEF header (may be Null) */ |
573 | typename Types::template OffsetTo<MarkGlyphSets> |
574 | markGlyphSetsDef; /* Offset to the table of mark set |
575 | * definitions--from beginning of GDEF |
576 | * header (may be NULL). Introduced |
577 | * in version 0x00010002. */ |
578 | Offset32To<VariationStore> |
579 | varStore; /* Offset to the table of Item Variation |
580 | * Store--from beginning of GDEF |
581 | * header (may be NULL). Introduced |
582 | * in version 0x00010003. */ |
583 | public: |
584 | DEFINE_SIZE_MIN (4 + 4 * Types::size); |
585 | |
586 | unsigned int get_size () const |
587 | { |
588 | return min_size + |
589 | (version.to_int () >= 0x00010002u ? markGlyphSetsDef.static_size : 0) + |
590 | (version.to_int () >= 0x00010003u ? varStore.static_size : 0); |
591 | } |
592 | |
593 | bool sanitize (hb_sanitize_context_t *c) const |
594 | { |
595 | TRACE_SANITIZE (this); |
596 | return_trace (version.sanitize (c) && |
597 | glyphClassDef.sanitize (c, this) && |
598 | attachList.sanitize (c, this) && |
599 | ligCaretList.sanitize (c, this) && |
600 | markAttachClassDef.sanitize (c, this) && |
601 | (version.to_int () < 0x00010002u || markGlyphSetsDef.sanitize (c, this)) && |
602 | (version.to_int () < 0x00010003u || varStore.sanitize (c, this))); |
603 | } |
604 | |
605 | bool subset (hb_subset_context_t *c) const |
606 | { |
607 | TRACE_SUBSET (this); |
608 | auto *out = c->serializer->embed (*this); |
609 | if (unlikely (!out)) return_trace (false); |
610 | |
611 | bool subset_glyphclassdef = out->glyphClassDef.serialize_subset (c, glyphClassDef, this, nullptr, false, true); |
612 | bool subset_attachlist = out->attachList.serialize_subset (c, attachList, this); |
613 | bool subset_ligcaretlist = out->ligCaretList.serialize_subset (c, ligCaretList, this); |
614 | bool subset_markattachclassdef = out->markAttachClassDef.serialize_subset (c, markAttachClassDef, this, nullptr, false, true); |
615 | |
616 | bool subset_markglyphsetsdef = false; |
617 | if (version.to_int () >= 0x00010002u) |
618 | { |
619 | subset_markglyphsetsdef = out->markGlyphSetsDef.serialize_subset (c, markGlyphSetsDef, this); |
620 | } |
621 | |
622 | bool subset_varstore = false; |
623 | if (version.to_int () >= 0x00010003u) |
624 | { |
625 | if (c->plan->all_axes_pinned) |
626 | out->varStore = 0; |
627 | else |
628 | subset_varstore = out->varStore.serialize_subset (c, varStore, this, c->plan->gdef_varstore_inner_maps.as_array ()); |
629 | } |
630 | |
631 | if (subset_varstore) |
632 | { |
633 | out->version.minor = 3; |
634 | } else if (subset_markglyphsetsdef) { |
635 | out->version.minor = 2; |
636 | } else { |
637 | out->version.minor = 0; |
638 | } |
639 | |
640 | return_trace (subset_glyphclassdef || subset_attachlist || |
641 | subset_ligcaretlist || subset_markattachclassdef || |
642 | (out->version.to_int () >= 0x00010002u && subset_markglyphsetsdef) || |
643 | (out->version.to_int () >= 0x00010003u && subset_varstore)); |
644 | } |
645 | }; |
646 | |
647 | struct GDEF |
648 | { |
649 | static constexpr hb_tag_t tableTag = HB_OT_TAG_GDEF; |
650 | |
651 | enum GlyphClasses { |
652 | UnclassifiedGlyph = 0, |
653 | BaseGlyph = 1, |
654 | LigatureGlyph = 2, |
655 | MarkGlyph = 3, |
656 | ComponentGlyph = 4 |
657 | }; |
658 | |
659 | unsigned int get_size () const |
660 | { |
661 | switch (u.version.major) { |
662 | case 1: return u.version1.get_size (); |
663 | #ifndef HB_NO_BEYOND_64K |
664 | case 2: return u.version2.get_size (); |
665 | #endif |
666 | default: return u.version.static_size; |
667 | } |
668 | } |
669 | |
670 | bool sanitize (hb_sanitize_context_t *c) const |
671 | { |
672 | TRACE_SANITIZE (this); |
673 | if (unlikely (!u.version.sanitize (c))) return_trace (false); |
674 | switch (u.version.major) { |
675 | case 1: return_trace (u.version1.sanitize (c)); |
676 | #ifndef HB_NO_BEYOND_64K |
677 | case 2: return_trace (u.version2.sanitize (c)); |
678 | #endif |
679 | default: return_trace (true); |
680 | } |
681 | } |
682 | |
683 | bool subset (hb_subset_context_t *c) const |
684 | { |
685 | switch (u.version.major) { |
686 | case 1: return u.version1.subset (c); |
687 | #ifndef HB_NO_BEYOND_64K |
688 | case 2: return u.version2.subset (c); |
689 | #endif |
690 | default: return false; |
691 | } |
692 | } |
693 | |
694 | bool has_glyph_classes () const |
695 | { |
696 | switch (u.version.major) { |
697 | case 1: return u.version1.glyphClassDef != 0; |
698 | #ifndef HB_NO_BEYOND_64K |
699 | case 2: return u.version2.glyphClassDef != 0; |
700 | #endif |
701 | default: return false; |
702 | } |
703 | } |
704 | const ClassDef &get_glyph_class_def () const |
705 | { |
706 | switch (u.version.major) { |
707 | case 1: return this+u.version1.glyphClassDef; |
708 | #ifndef HB_NO_BEYOND_64K |
709 | case 2: return this+u.version2.glyphClassDef; |
710 | #endif |
711 | default: return Null(ClassDef); |
712 | } |
713 | } |
714 | bool has_attach_list () const |
715 | { |
716 | switch (u.version.major) { |
717 | case 1: return u.version1.attachList != 0; |
718 | #ifndef HB_NO_BEYOND_64K |
719 | case 2: return u.version2.attachList != 0; |
720 | #endif |
721 | default: return false; |
722 | } |
723 | } |
724 | const AttachList &get_attach_list () const |
725 | { |
726 | switch (u.version.major) { |
727 | case 1: return this+u.version1.attachList; |
728 | #ifndef HB_NO_BEYOND_64K |
729 | case 2: return this+u.version2.attachList; |
730 | #endif |
731 | default: return Null(AttachList); |
732 | } |
733 | } |
734 | bool has_lig_carets () const |
735 | { |
736 | switch (u.version.major) { |
737 | case 1: return u.version1.ligCaretList != 0; |
738 | #ifndef HB_NO_BEYOND_64K |
739 | case 2: return u.version2.ligCaretList != 0; |
740 | #endif |
741 | default: return false; |
742 | } |
743 | } |
744 | const LigCaretList &get_lig_caret_list () const |
745 | { |
746 | switch (u.version.major) { |
747 | case 1: return this+u.version1.ligCaretList; |
748 | #ifndef HB_NO_BEYOND_64K |
749 | case 2: return this+u.version2.ligCaretList; |
750 | #endif |
751 | default: return Null(LigCaretList); |
752 | } |
753 | } |
754 | bool has_mark_attachment_types () const |
755 | { |
756 | switch (u.version.major) { |
757 | case 1: return u.version1.markAttachClassDef != 0; |
758 | #ifndef HB_NO_BEYOND_64K |
759 | case 2: return u.version2.markAttachClassDef != 0; |
760 | #endif |
761 | default: return false; |
762 | } |
763 | } |
764 | const ClassDef &get_mark_attach_class_def () const |
765 | { |
766 | switch (u.version.major) { |
767 | case 1: return this+u.version1.markAttachClassDef; |
768 | #ifndef HB_NO_BEYOND_64K |
769 | case 2: return this+u.version2.markAttachClassDef; |
770 | #endif |
771 | default: return Null(ClassDef); |
772 | } |
773 | } |
774 | bool has_mark_glyph_sets () const |
775 | { |
776 | switch (u.version.major) { |
777 | case 1: return u.version.to_int () >= 0x00010002u && u.version1.markGlyphSetsDef != 0; |
778 | #ifndef HB_NO_BEYOND_64K |
779 | case 2: return u.version2.markGlyphSetsDef != 0; |
780 | #endif |
781 | default: return false; |
782 | } |
783 | } |
784 | const MarkGlyphSets &get_mark_glyph_sets () const |
785 | { |
786 | switch (u.version.major) { |
787 | case 1: return u.version.to_int () >= 0x00010002u ? this+u.version1.markGlyphSetsDef : Null(MarkGlyphSets); |
788 | #ifndef HB_NO_BEYOND_64K |
789 | case 2: return this+u.version2.markGlyphSetsDef; |
790 | #endif |
791 | default: return Null(MarkGlyphSets); |
792 | } |
793 | } |
794 | bool has_var_store () const |
795 | { |
796 | switch (u.version.major) { |
797 | case 1: return u.version.to_int () >= 0x00010003u && u.version1.varStore != 0; |
798 | #ifndef HB_NO_BEYOND_64K |
799 | case 2: return u.version2.varStore != 0; |
800 | #endif |
801 | default: return false; |
802 | } |
803 | } |
804 | const VariationStore &get_var_store () const |
805 | { |
806 | switch (u.version.major) { |
807 | case 1: return u.version.to_int () >= 0x00010003u ? this+u.version1.varStore : Null(VariationStore); |
808 | #ifndef HB_NO_BEYOND_64K |
809 | case 2: return this+u.version2.varStore; |
810 | #endif |
811 | default: return Null(VariationStore); |
812 | } |
813 | } |
814 | |
815 | |
816 | bool has_data () const { return u.version.to_int (); } |
817 | unsigned int get_glyph_class (hb_codepoint_t glyph) const |
818 | { return get_glyph_class_def ().get_class (glyph); } |
819 | void get_glyphs_in_class (unsigned int klass, hb_set_t *glyphs) const |
820 | { get_glyph_class_def ().collect_class (glyphs, klass); } |
821 | |
822 | unsigned int get_mark_attachment_type (hb_codepoint_t glyph) const |
823 | { return get_mark_attach_class_def ().get_class (glyph); } |
824 | |
825 | unsigned int get_attach_points (hb_codepoint_t glyph_id, |
826 | unsigned int start_offset, |
827 | unsigned int *point_count /* IN/OUT */, |
828 | unsigned int *point_array /* OUT */) const |
829 | { return get_attach_list ().get_attach_points (glyph_id, start_offset, point_count, point_array); } |
830 | |
831 | unsigned int get_lig_carets (hb_font_t *font, |
832 | hb_direction_t direction, |
833 | hb_codepoint_t glyph_id, |
834 | unsigned int start_offset, |
835 | unsigned int *caret_count /* IN/OUT */, |
836 | hb_position_t *caret_array /* OUT */) const |
837 | { return get_lig_caret_list ().get_lig_carets (font, |
838 | direction, glyph_id, get_var_store(), |
839 | start_offset, caret_count, caret_array); } |
840 | |
841 | bool mark_set_covers (unsigned int set_index, hb_codepoint_t glyph_id) const |
842 | { return get_mark_glyph_sets ().covers (set_index, glyph_id); } |
843 | |
844 | /* glyph_props is a 16-bit integer where the lower 8-bit have bits representing |
845 | * glyph class and other bits, and high 8-bit the mark attachment type (if any). |
846 | * Not to be confused with lookup_props which is very similar. */ |
847 | unsigned int get_glyph_props (hb_codepoint_t glyph) const |
848 | { |
849 | unsigned int klass = get_glyph_class (glyph); |
850 | |
851 | static_assert (((unsigned int) HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH == (unsigned int) LookupFlag::IgnoreBaseGlyphs), "" ); |
852 | static_assert (((unsigned int) HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE == (unsigned int) LookupFlag::IgnoreLigatures), "" ); |
853 | static_assert (((unsigned int) HB_OT_LAYOUT_GLYPH_PROPS_MARK == (unsigned int) LookupFlag::IgnoreMarks), "" ); |
854 | |
855 | switch (klass) { |
856 | default: return HB_OT_LAYOUT_GLYPH_CLASS_UNCLASSIFIED; |
857 | case BaseGlyph: return HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH; |
858 | case LigatureGlyph: return HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE; |
859 | case MarkGlyph: |
860 | klass = get_mark_attachment_type (glyph); |
861 | return HB_OT_LAYOUT_GLYPH_PROPS_MARK | (klass << 8); |
862 | } |
863 | } |
864 | |
865 | HB_INTERNAL bool is_blocklisted (hb_blob_t *blob, |
866 | hb_face_t *face) const; |
867 | |
868 | struct accelerator_t |
869 | { |
870 | accelerator_t (hb_face_t *face) |
871 | { |
872 | table = hb_sanitize_context_t ().reference_table<GDEF> (face); |
873 | if (unlikely (table->is_blocklisted (table.get_blob (), face))) |
874 | { |
875 | hb_blob_destroy (table.get_blob ()); |
876 | table = hb_blob_get_empty (); |
877 | } |
878 | |
879 | #ifndef HB_NO_GDEF_CACHE |
880 | table->get_mark_glyph_sets ().collect_coverage (mark_glyph_set_digests); |
881 | #endif |
882 | } |
883 | ~accelerator_t () { table.destroy (); } |
884 | |
885 | unsigned int get_glyph_props (hb_codepoint_t glyph) const |
886 | { |
887 | unsigned v; |
888 | |
889 | #ifndef HB_NO_GDEF_CACHE |
890 | if (glyph_props_cache.get (glyph, &v)) |
891 | return v; |
892 | #endif |
893 | |
894 | v = table->get_glyph_props (glyph); |
895 | |
896 | #ifndef HB_NO_GDEF_CACHE |
897 | if (likely (table.get_blob ())) // Don't try setting if we are the null instance! |
898 | glyph_props_cache.set (glyph, v); |
899 | #endif |
900 | |
901 | return v; |
902 | |
903 | } |
904 | |
905 | bool mark_set_covers (unsigned int set_index, hb_codepoint_t glyph_id) const |
906 | { |
907 | return |
908 | #ifndef HB_NO_GDEF_CACHE |
909 | mark_glyph_set_digests[set_index].may_have (glyph_id) && |
910 | #endif |
911 | table->mark_set_covers (set_index, glyph_id); |
912 | } |
913 | |
914 | hb_blob_ptr_t<GDEF> table; |
915 | #ifndef HB_NO_GDEF_CACHE |
916 | hb_vector_t<hb_set_digest_t> mark_glyph_set_digests; |
917 | mutable hb_cache_t<21, 3, 8> glyph_props_cache; |
918 | #endif |
919 | }; |
920 | |
921 | void collect_variation_indices (hb_collect_variation_indices_context_t *c) const |
922 | { get_lig_caret_list ().collect_variation_indices (c); } |
923 | |
924 | void remap_layout_variation_indices (const hb_set_t *layout_variation_indices, |
925 | hb_hashmap_t<unsigned, hb_pair_t<unsigned, int>> *layout_variation_idx_delta_map /* OUT */) const |
926 | { |
927 | if (!has_var_store ()) return; |
928 | if (layout_variation_indices->is_empty ()) return; |
929 | |
930 | unsigned new_major = 0, new_minor = 0; |
931 | unsigned last_major = (layout_variation_indices->get_min ()) >> 16; |
932 | for (unsigned idx : layout_variation_indices->iter ()) |
933 | { |
934 | uint16_t major = idx >> 16; |
935 | if (major >= get_var_store ().get_sub_table_count ()) break; |
936 | if (major != last_major) |
937 | { |
938 | new_minor = 0; |
939 | ++new_major; |
940 | } |
941 | |
942 | unsigned new_idx = (new_major << 16) + new_minor; |
943 | if (!layout_variation_idx_delta_map->has (idx)) |
944 | continue; |
945 | int delta = hb_second (layout_variation_idx_delta_map->get (idx)); |
946 | |
947 | layout_variation_idx_delta_map->set (idx, hb_pair_t<unsigned, int> (new_idx, delta)); |
948 | ++new_minor; |
949 | last_major = major; |
950 | } |
951 | } |
952 | |
953 | protected: |
954 | union { |
955 | FixedVersion<> version; /* Version identifier */ |
956 | GDEFVersion1_2<SmallTypes> version1; |
957 | #ifndef HB_NO_BEYOND_64K |
958 | GDEFVersion1_2<MediumTypes> version2; |
959 | #endif |
960 | } u; |
961 | public: |
962 | DEFINE_SIZE_MIN (4); |
963 | }; |
964 | |
965 | struct GDEF_accelerator_t : GDEF::accelerator_t { |
966 | GDEF_accelerator_t (hb_face_t *face) : GDEF::accelerator_t (face) {} |
967 | }; |
968 | |
969 | } /* namespace OT */ |
970 | |
971 | |
972 | #endif /* OT_LAYOUT_GDEF_GDEF_HH */ |
973 | |