1 /*
2 * Copyright © 2007,2008,2009 Red Hat, Inc.
3 * Copyright © 2012,2013 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 HB_OT_LAYOUT_HH
30 #define HB_OT_LAYOUT_HH
31
32 #include "hb.hh"
33
34 #include "hb-font.hh"
35 #include "hb-buffer.hh"
36 #include "hb-open-type.hh"
37 #include "hb-ot-shape.hh"
38 #include "hb-set-digest.hh"
39
40
41 struct hb_ot_shape_plan_t;
42
43
44 /*
45 * kern
46 */
47
48 HB_INTERNAL bool
49 hb_ot_layout_has_kerning (hb_face_t *face);
50
51 HB_INTERNAL bool
52 hb_ot_layout_has_machine_kerning (hb_face_t *face);
53
54 HB_INTERNAL bool
55 hb_ot_layout_has_cross_kerning (hb_face_t *face);
56
57 HB_INTERNAL void
58 hb_ot_layout_kern (const hb_ot_shape_plan_t *plan,
59 hb_font_t *font,
60 hb_buffer_t *buffer);
61
62
63 /* Private API corresponding to hb-ot-layout.h: */
64
65 HB_INTERNAL bool
66 hb_ot_layout_table_find_feature (hb_face_t *face,
67 hb_tag_t table_tag,
68 hb_tag_t feature_tag,
69 unsigned int *feature_index);
70
71
72 /*
73 * GDEF
74 */
75
76 enum hb_ot_layout_glyph_props_flags_t
77 {
78 /* The following three match LookupFlags::Ignore* numbers. */
79 HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH = 0x02u,
80 HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE = 0x04u,
81 HB_OT_LAYOUT_GLYPH_PROPS_MARK = 0x08u,
82
83 /* The following are used internally; not derived from GDEF. */
84 HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED = 0x10u,
85 HB_OT_LAYOUT_GLYPH_PROPS_LIGATED = 0x20u,
86 HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED = 0x40u,
87
88 HB_OT_LAYOUT_GLYPH_PROPS_PRESERVE = HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED |
89 HB_OT_LAYOUT_GLYPH_PROPS_LIGATED |
90 HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED
91 };
92 HB_MARK_AS_FLAG_T (hb_ot_layout_glyph_props_flags_t);
93
94
95 /*
96 * GSUB/GPOS
97 */
98
99 HB_INTERNAL bool
100 hb_ot_layout_lookup_would_substitute_fast (hb_face_t *face,
101 unsigned int lookup_index,
102 const hb_codepoint_t *glyphs,
103 unsigned int glyphs_length,
104 bool zero_context);
105
106
107 /* Should be called before all the substitute_lookup's are done. */
108 HB_INTERNAL void
109 hb_ot_layout_substitute_start (hb_font_t *font,
110 hb_buffer_t *buffer);
111
112 HB_INTERNAL void
113 hb_ot_layout_delete_glyphs_inplace (hb_buffer_t *buffer,
114 bool (*filter) (const hb_glyph_info_t *info));
115
116 namespace OT {
117 struct hb_ot_apply_context_t;
118 struct SubstLookup;
119 struct hb_ot_layout_lookup_accelerator_t;
120 }
121
122 HB_INTERNAL void
123 hb_ot_layout_substitute_lookup (OT::hb_ot_apply_context_t *c,
124 const OT::SubstLookup &lookup,
125 const OT::hb_ot_layout_lookup_accelerator_t &accel);
126
127
128 /* Should be called before all the position_lookup's are done. */
129 HB_INTERNAL void
130 hb_ot_layout_position_start (hb_font_t *font,
131 hb_buffer_t *buffer);
132
133 /* Should be called after all the position_lookup's are done, to fini advances. */
134 HB_INTERNAL void
135 hb_ot_layout_position_finish_advances (hb_font_t *font,
136 hb_buffer_t *buffer);
137
138 /* Should be called after hb_ot_layout_position_finish_advances, to fini offsets. */
139 HB_INTERNAL void
140 hb_ot_layout_position_finish_offsets (hb_font_t *font,
141 hb_buffer_t *buffer);
142
143
144 /*
145 * Buffer var routines.
146 */
147
148 /* buffer var allocations, used during the entire shaping process */
149 #define unicode_props() var2.u16[0]
150
151 /* buffer var allocations, used during the GSUB/GPOS processing */
152 #define glyph_props() var1.u16[0] /* GDEF glyph properties */
153 #define lig_props() var1.u8[2] /* GSUB/GPOS ligature tracking */
154 #define syllable() var1.u8[3] /* GSUB/GPOS shaping boundaries */
155
156
157 /* Loop over syllables. Based on foreach_cluster(). */
158 #define foreach_syllable(buffer, start, end) \
159 for (unsigned int \
160 _count = buffer->len, \
161 start = 0, end = _count ? _hb_next_syllable (buffer, 0) : 0; \
162 start < _count; \
163 start = end, end = _hb_next_syllable (buffer, start))
164
165 static inline unsigned int
166 _hb_next_syllable (hb_buffer_t *buffer, unsigned int start)
167 {
168 hb_glyph_info_t *info = buffer->info;
169 unsigned int count = buffer->len;
170
171 unsigned int syllable = info[start].syllable();
172 while (++start < count && syllable == info[start].syllable())
173 ;
174
175 return start;
176 }
177
178
179 /* unicode_props */
180
181 /* Design:
182 * unicode_props() is a two-byte number. The low byte includes:
183 * - General_Category: 5 bits.
184 * - A bit each for:
185 * * Is it Default_Ignorable(); we have a modified Default_Ignorable().
186 * * Whether it's one of the three Mongolian Free Variation Selectors,
187 * CGJ, or other characters that are hidden but should not be ignored
188 * like most other Default_Ignorable()s do during matching.
189 * * Whether it's a grapheme continuation.
190 *
191 * The high-byte has different meanings, switched by the Gen-Cat:
192 * - For Mn,Mc,Me: the modified Combining_Class.
193 * - For Cf: whether it's ZWJ, ZWNJ, or something else.
194 * - For Ws: index of which space character this is, if space fallback
195 * is needed, ie. we don't set this by default, only if asked to.
196 */
197
198 enum hb_unicode_props_flags_t {
199 UPROPS_MASK_GEN_CAT = 0x001Fu,
200 UPROPS_MASK_IGNORABLE = 0x0020u,
201 UPROPS_MASK_HIDDEN = 0x0040u, /* MONGOLIAN FREE VARIATION SELECTOR 1..3, or TAG characters */
202 UPROPS_MASK_CONTINUATION=0x0080u,
203
204 /* If GEN_CAT=FORMAT, top byte masks: */
205 UPROPS_MASK_Cf_ZWJ = 0x0100u,
206 UPROPS_MASK_Cf_ZWNJ = 0x0200u
207 };
208 HB_MARK_AS_FLAG_T (hb_unicode_props_flags_t);
209
210 static inline void
211 _hb_glyph_info_set_unicode_props (hb_glyph_info_t *info, hb_buffer_t *buffer)
212 {
213 hb_unicode_funcs_t *unicode = buffer->unicode;
214 unsigned int u = info->codepoint;
215 unsigned int gen_cat = (unsigned int) unicode->general_category (u);
216 unsigned int props = gen_cat;
217
218 if (u >= 0x80)
219 {
220 buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_NON_ASCII;
221
222 if (unlikely (unicode->is_default_ignorable (u)))
223 {
224 buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_DEFAULT_IGNORABLES;
225 props |= UPROPS_MASK_IGNORABLE;
226 if (u == 0x200Cu) props |= UPROPS_MASK_Cf_ZWNJ;
227 else if (u == 0x200Du) props |= UPROPS_MASK_Cf_ZWJ;
228 /* Mongolian Free Variation Selectors need to be remembered
229 * because although we need to hide them like default-ignorables,
230 * they need to non-ignorable during shaping. This is similar to
231 * what we do for joiners in Indic-like shapers, but since the
232 * FVSes are GC=Mn, we have use a separate bit to remember them.
233 * Fixes:
234 * https://github.com/harfbuzz/harfbuzz/issues/234 */
235 else if (unlikely (hb_in_range (u, 0x180Bu, 0x180Du))) props |= UPROPS_MASK_HIDDEN;
236 /* TAG characters need similar treatment. Fixes:
237 * https://github.com/harfbuzz/harfbuzz/issues/463 */
238 else if (unlikely (hb_in_range (u, 0xE0020u, 0xE007Fu))) props |= UPROPS_MASK_HIDDEN;
239 /* COMBINING GRAPHEME JOINER should not be skipped; at least some times.
240 * https://github.com/harfbuzz/harfbuzz/issues/554 */
241 else if (unlikely (u == 0x034Fu))
242 {
243 buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_CGJ;
244 props |= UPROPS_MASK_HIDDEN;
245 }
246 }
247
248 if (unlikely (HB_UNICODE_GENERAL_CATEGORY_IS_MARK (gen_cat)))
249 {
250 props |= UPROPS_MASK_CONTINUATION;
251 props |= unicode->modified_combining_class (u)<<8;
252 }
253 }
254
255 info->unicode_props() = props;
256 }
257
258 static inline void
259 _hb_glyph_info_set_general_category (hb_glyph_info_t *info,
260 hb_unicode_general_category_t gen_cat)
261 {
262 /* Clears top-byte. */
263 info->unicode_props() = (unsigned int) gen_cat | (info->unicode_props() & (0xFF & ~UPROPS_MASK_GEN_CAT));
264 }
265
266 static inline hb_unicode_general_category_t
267 _hb_glyph_info_get_general_category (const hb_glyph_info_t *info)
268 {
269 return (hb_unicode_general_category_t) (info->unicode_props() & UPROPS_MASK_GEN_CAT);
270 }
271
272 static inline bool
273 _hb_glyph_info_is_unicode_mark (const hb_glyph_info_t *info)
274 {
275 return HB_UNICODE_GENERAL_CATEGORY_IS_MARK (info->unicode_props() & UPROPS_MASK_GEN_CAT);
276 }
277 static inline void
278 _hb_glyph_info_set_modified_combining_class (hb_glyph_info_t *info,
279 unsigned int modified_class)
280 {
281 if (unlikely (!_hb_glyph_info_is_unicode_mark (info)))
282 return;
283 info->unicode_props() = (modified_class<<8) | (info->unicode_props() & 0xFF);
284 }
285 static inline unsigned int
286 _hb_glyph_info_get_modified_combining_class (const hb_glyph_info_t *info)
287 {
288 return _hb_glyph_info_is_unicode_mark (info) ? info->unicode_props()>>8 : 0;
289 }
290 #define info_cc(info) (_hb_glyph_info_get_modified_combining_class (&(info)))
291
292 static inline bool
293 _hb_glyph_info_is_unicode_space (const hb_glyph_info_t *info)
294 {
295 return _hb_glyph_info_get_general_category (info) ==
296 HB_UNICODE_GENERAL_CATEGORY_SPACE_SEPARATOR;
297 }
298 static inline void
299 _hb_glyph_info_set_unicode_space_fallback_type (hb_glyph_info_t *info, hb_unicode_funcs_t::space_t s)
300 {
301 if (unlikely (!_hb_glyph_info_is_unicode_space (info)))
302 return;
303 info->unicode_props() = (((unsigned int) s)<<8) | (info->unicode_props() & 0xFF);
304 }
305 static inline hb_unicode_funcs_t::space_t
306 _hb_glyph_info_get_unicode_space_fallback_type (const hb_glyph_info_t *info)
307 {
308 return _hb_glyph_info_is_unicode_space (info) ?
309 (hb_unicode_funcs_t::space_t) (info->unicode_props()>>8) :
310 hb_unicode_funcs_t::NOT_SPACE;
311 }
312
313 static inline bool _hb_glyph_info_ligated (const hb_glyph_info_t *info);
314
315 static inline bool
316 _hb_glyph_info_is_default_ignorable (const hb_glyph_info_t *info)
317 {
318 return (info->unicode_props() & UPROPS_MASK_IGNORABLE) &&
319 !_hb_glyph_info_ligated (info);
320 }
321 static inline bool
322 _hb_glyph_info_is_default_ignorable_and_not_hidden (const hb_glyph_info_t *info)
323 {
324 return ((info->unicode_props() & (UPROPS_MASK_IGNORABLE|UPROPS_MASK_HIDDEN))
325 == UPROPS_MASK_IGNORABLE) &&
326 !_hb_glyph_info_ligated (info);
327 }
328 static inline void
329 _hb_glyph_info_unhide (hb_glyph_info_t *info)
330 {
331 info->unicode_props() &= ~ UPROPS_MASK_HIDDEN;
332 }
333
334 static inline void
335 _hb_glyph_info_set_continuation (hb_glyph_info_t *info)
336 {
337 info->unicode_props() |= UPROPS_MASK_CONTINUATION;
338 }
339 static inline void
340 _hb_glyph_info_reset_continuation (hb_glyph_info_t *info)
341 {
342 info->unicode_props() &= ~ UPROPS_MASK_CONTINUATION;
343 }
344 static inline bool
345 _hb_glyph_info_is_continuation (const hb_glyph_info_t *info)
346 {
347 return info->unicode_props() & UPROPS_MASK_CONTINUATION;
348 }
349 /* Loop over grapheme. Based on foreach_cluster(). */
350 #define foreach_grapheme(buffer, start, end) \
351 for (unsigned int \
352 _count = buffer->len, \
353 start = 0, end = _count ? _hb_next_grapheme (buffer, 0) : 0; \
354 start < _count; \
355 start = end, end = _hb_next_grapheme (buffer, start))
356
357 static inline unsigned int
358 _hb_next_grapheme (hb_buffer_t *buffer, unsigned int start)
359 {
360 hb_glyph_info_t *info = buffer->info;
361 unsigned int count = buffer->len;
362
363 while (++start < count && _hb_glyph_info_is_continuation (&info[start]))
364 ;
365
366 return start;
367 }
368
369 static inline bool
370 _hb_glyph_info_is_unicode_format (const hb_glyph_info_t *info)
371 {
372 return _hb_glyph_info_get_general_category (info) ==
373 HB_UNICODE_GENERAL_CATEGORY_FORMAT;
374 }
375 static inline bool
376 _hb_glyph_info_is_zwnj (const hb_glyph_info_t *info)
377 {
378 return _hb_glyph_info_is_unicode_format (info) && (info->unicode_props() & UPROPS_MASK_Cf_ZWNJ);
379 }
380 static inline bool
381 _hb_glyph_info_is_zwj (const hb_glyph_info_t *info)
382 {
383 return _hb_glyph_info_is_unicode_format (info) && (info->unicode_props() & UPROPS_MASK_Cf_ZWJ);
384 }
385 static inline bool
386 _hb_glyph_info_is_joiner (const hb_glyph_info_t *info)
387 {
388 return _hb_glyph_info_is_unicode_format (info) && (info->unicode_props() & (UPROPS_MASK_Cf_ZWNJ|UPROPS_MASK_Cf_ZWJ));
389 }
390 static inline void
391 _hb_glyph_info_flip_joiners (hb_glyph_info_t *info)
392 {
393 if (!_hb_glyph_info_is_unicode_format (info))
394 return;
395 info->unicode_props() ^= UPROPS_MASK_Cf_ZWNJ | UPROPS_MASK_Cf_ZWJ;
396 }
397
398 /* lig_props: aka lig_id / lig_comp
399 *
400 * When a ligature is formed:
401 *
402 * - The ligature glyph and any marks in between all the same newly allocated
403 * lig_id,
404 * - The ligature glyph will get lig_num_comps set to the number of components
405 * - The marks get lig_comp > 0, reflecting which component of the ligature
406 * they were applied to.
407 * - This is used in GPOS to attach marks to the right component of a ligature
408 * in MarkLigPos,
409 * - Note that when marks are ligated together, much of the above is skipped
410 * and the current lig_id reused.
411 *
412 * When a multiple-substitution is done:
413 *
414 * - All resulting glyphs will have lig_id = 0,
415 * - The resulting glyphs will have lig_comp = 0, 1, 2, ... respectively.
416 * - This is used in GPOS to attach marks to the first component of a
417 * multiple substitution in MarkBasePos.
418 *
419 * The numbers are also used in GPOS to do mark-to-mark positioning only
420 * to marks that belong to the same component of the same ligature.
421 */
422
423 static inline void
424 _hb_glyph_info_clear_lig_props (hb_glyph_info_t *info)
425 {
426 info->lig_props() = 0;
427 }
428
429 #define IS_LIG_BASE 0x10
430
431 static inline void
432 _hb_glyph_info_set_lig_props_for_ligature (hb_glyph_info_t *info,
433 unsigned int lig_id,
434 unsigned int lig_num_comps)
435 {
436 info->lig_props() = (lig_id << 5) | IS_LIG_BASE | (lig_num_comps & 0x0F);
437 }
438
439 static inline void
440 _hb_glyph_info_set_lig_props_for_mark (hb_glyph_info_t *info,
441 unsigned int lig_id,
442 unsigned int lig_comp)
443 {
444 info->lig_props() = (lig_id << 5) | (lig_comp & 0x0F);
445 }
446
447 static inline void
448 _hb_glyph_info_set_lig_props_for_component (hb_glyph_info_t *info, unsigned int comp)
449 {
450 _hb_glyph_info_set_lig_props_for_mark (info, 0, comp);
451 }
452
453 static inline unsigned int
454 _hb_glyph_info_get_lig_id (const hb_glyph_info_t *info)
455 {
456 return info->lig_props() >> 5;
457 }
458
459 static inline bool
460 _hb_glyph_info_ligated_internal (const hb_glyph_info_t *info)
461 {
462 return !!(info->lig_props() & IS_LIG_BASE);
463 }
464
465 static inline unsigned int
466 _hb_glyph_info_get_lig_comp (const hb_glyph_info_t *info)
467 {
468 if (_hb_glyph_info_ligated_internal (info))
469 return 0;
470 else
471 return info->lig_props() & 0x0F;
472 }
473
474 static inline unsigned int
475 _hb_glyph_info_get_lig_num_comps (const hb_glyph_info_t *info)
476 {
477 if ((info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE) &&
478 _hb_glyph_info_ligated_internal (info))
479 return info->lig_props() & 0x0F;
480 else
481 return 1;
482 }
483
484 static inline uint8_t
485 _hb_allocate_lig_id (hb_buffer_t *buffer) {
486 uint8_t lig_id = buffer->next_serial () & 0x07;
487 if (unlikely (!lig_id))
488 lig_id = _hb_allocate_lig_id (buffer); /* in case of overflow */
489 return lig_id;
490 }
491
492 /* glyph_props: */
493
494 static inline void
495 _hb_glyph_info_set_glyph_props (hb_glyph_info_t *info, unsigned int props)
496 {
497 info->glyph_props() = props;
498 }
499
500 static inline unsigned int
501 _hb_glyph_info_get_glyph_props (const hb_glyph_info_t *info)
502 {
503 return info->glyph_props();
504 }
505
506 static inline bool
507 _hb_glyph_info_is_base_glyph (const hb_glyph_info_t *info)
508 {
509 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH);
510 }
511
512 static inline bool
513 _hb_glyph_info_is_ligature (const hb_glyph_info_t *info)
514 {
515 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE);
516 }
517
518 static inline bool
519 _hb_glyph_info_is_mark (const hb_glyph_info_t *info)
520 {
521 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_MARK);
522 }
523
524 static inline bool
525 _hb_glyph_info_substituted (const hb_glyph_info_t *info)
526 {
527 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED);
528 }
529
530 static inline bool
531 _hb_glyph_info_ligated (const hb_glyph_info_t *info)
532 {
533 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATED);
534 }
535
536 static inline bool
537 _hb_glyph_info_multiplied (const hb_glyph_info_t *info)
538 {
539 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED);
540 }
541
542 static inline bool
543 _hb_glyph_info_ligated_and_didnt_multiply (const hb_glyph_info_t *info)
544 {
545 return _hb_glyph_info_ligated (info) && !_hb_glyph_info_multiplied (info);
546 }
547
548 static inline void
549 _hb_glyph_info_clear_ligated_and_multiplied (hb_glyph_info_t *info)
550 {
551 info->glyph_props() &= ~(HB_OT_LAYOUT_GLYPH_PROPS_LIGATED |
552 HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED);
553 }
554
555 static inline void
556 _hb_glyph_info_clear_substituted (hb_glyph_info_t *info)
557 {
558 info->glyph_props() &= ~(HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED);
559 }
560
561
562 /* Allocation / deallocation. */
563
564 static inline void
565 _hb_buffer_allocate_unicode_vars (hb_buffer_t *buffer)
566 {
567 HB_BUFFER_ALLOCATE_VAR (buffer, unicode_props);
568 }
569
570 static inline void
571 _hb_buffer_deallocate_unicode_vars (hb_buffer_t *buffer)
572 {
573 HB_BUFFER_DEALLOCATE_VAR (buffer, unicode_props);
574 }
575
576 static inline void
577 _hb_buffer_assert_unicode_vars (hb_buffer_t *buffer)
578 {
579 HB_BUFFER_ASSERT_VAR (buffer, unicode_props);
580 }
581
582 static inline void
583 _hb_buffer_allocate_gsubgpos_vars (hb_buffer_t *buffer)
584 {
585 HB_BUFFER_ALLOCATE_VAR (buffer, glyph_props);
586 HB_BUFFER_ALLOCATE_VAR (buffer, lig_props);
587 HB_BUFFER_ALLOCATE_VAR (buffer, syllable);
588 }
589
590 static inline void
591 _hb_buffer_deallocate_gsubgpos_vars (hb_buffer_t *buffer)
592 {
593 HB_BUFFER_DEALLOCATE_VAR (buffer, syllable);
594 HB_BUFFER_DEALLOCATE_VAR (buffer, lig_props);
595 HB_BUFFER_DEALLOCATE_VAR (buffer, glyph_props);
596 }
597
598 static inline void
599 _hb_buffer_assert_gsubgpos_vars (hb_buffer_t *buffer)
600 {
601 HB_BUFFER_ASSERT_VAR (buffer, glyph_props);
602 HB_BUFFER_ASSERT_VAR (buffer, lig_props);
603 HB_BUFFER_ASSERT_VAR (buffer, syllable);
604 }
605
606 /* Make sure no one directly touches our props... */
607 #undef unicode_props0
608 #undef unicode_props1
609 #undef lig_props
610 #undef glyph_props
611
612 #endif /* HB_OT_LAYOUT_HH */