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
41struct hb_ot_shape_plan_t;
42
43
44/*
45 * kern
46 */
47
48HB_INTERNAL bool
49hb_ot_layout_has_kerning (hb_face_t *face);
50
51HB_INTERNAL bool
52hb_ot_layout_has_machine_kerning (hb_face_t *face);
53
54HB_INTERNAL bool
55hb_ot_layout_has_cross_kerning (hb_face_t *face);
56
57HB_INTERNAL void
58hb_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
65HB_INTERNAL bool
66hb_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
76enum 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 HB_OT_LAYOUT_GLYPH_PROPS_CLASS_MASK = HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH |
84 HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE |
85 HB_OT_LAYOUT_GLYPH_PROPS_MARK,
86
87 /* The following are used internally; not derived from GDEF. */
88 HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED = 0x10u,
89 HB_OT_LAYOUT_GLYPH_PROPS_LIGATED = 0x20u,
90 HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED = 0x40u,
91};
92HB_MARK_AS_FLAG_T (hb_ot_layout_glyph_props_flags_t);
93
94
95/*
96 * GSUB/GPOS
97 */
98
99
100/* Should be called before all the substitute_lookup's are done. */
101HB_INTERNAL void
102hb_ot_layout_substitute_start (hb_font_t *font,
103 hb_buffer_t *buffer);
104
105HB_INTERNAL void
106hb_ot_layout_delete_glyphs_inplace (hb_buffer_t *buffer,
107 bool (*filter) (const hb_glyph_info_t *info));
108
109namespace OT {
110 struct hb_ot_apply_context_t;
111 struct SubstLookup;
112 struct hb_ot_layout_lookup_accelerator_t;
113}
114
115HB_INTERNAL void
116hb_ot_layout_substitute_lookup (OT::hb_ot_apply_context_t *c,
117 const OT::SubstLookup &lookup,
118 const OT::hb_ot_layout_lookup_accelerator_t &accel);
119
120
121/* Should be called before all the position_lookup's are done. */
122HB_INTERNAL void
123hb_ot_layout_position_start (hb_font_t *font,
124 hb_buffer_t *buffer);
125
126/* Should be called after all the position_lookup's are done, to fini advances. */
127HB_INTERNAL void
128hb_ot_layout_position_finish_advances (hb_font_t *font,
129 hb_buffer_t *buffer);
130
131/* Should be called after hb_ot_layout_position_finish_advances, to fini offsets. */
132HB_INTERNAL void
133hb_ot_layout_position_finish_offsets (hb_font_t *font,
134 hb_buffer_t *buffer);
135
136
137/*
138 * Buffer var routines.
139 */
140
141/* buffer var allocations, used during the entire shaping process */
142#define unicode_props() var2.u16[0]
143
144/* buffer var allocations, used during the GSUB/GPOS processing */
145#define glyph_props() var1.u16[0] /* GDEF glyph properties */
146#define lig_props() var1.u8[2] /* GSUB/GPOS ligature tracking */
147#define syllable() var1.u8[3] /* GSUB/GPOS shaping boundaries */
148
149
150/* Loop over syllables. Based on foreach_cluster(). */
151#define foreach_syllable(buffer, start, end) \
152 for (unsigned int \
153 _count = buffer->len, \
154 start = 0, end = _count ? _hb_next_syllable (buffer, 0) : 0; \
155 start < _count; \
156 start = end, end = _hb_next_syllable (buffer, start))
157
158static inline unsigned int
159_hb_next_syllable (hb_buffer_t *buffer, unsigned int start)
160{
161 hb_glyph_info_t *info = buffer->info;
162 unsigned int count = buffer->len;
163
164 unsigned int syllable = info[start].syllable();
165 while (++start < count && syllable == info[start].syllable())
166 ;
167
168 return start;
169}
170
171static inline void
172_hb_clear_syllables (const hb_ot_shape_plan_t *plan HB_UNUSED,
173 hb_font_t *font HB_UNUSED,
174 hb_buffer_t *buffer)
175{
176 hb_glyph_info_t *info = buffer->info;
177 unsigned int count = buffer->len;
178 for (unsigned int i = 0; i < count; i++)
179 info[i].syllable() = 0;
180}
181
182
183/* unicode_props */
184
185/* Design:
186 * unicode_props() is a two-byte number. The low byte includes:
187 * - General_Category: 5 bits.
188 * - A bit each for:
189 * * Is it Default_Ignorable(); we have a modified Default_Ignorable().
190 * * Whether it's one of the three Mongolian Free Variation Selectors,
191 * CGJ, or other characters that are hidden but should not be ignored
192 * like most other Default_Ignorable()s do during matching.
193 * * Whether it's a grapheme continuation.
194 *
195 * The high-byte has different meanings, switched by the Gen-Cat:
196 * - For Mn,Mc,Me: the modified Combining_Class.
197 * - For Cf: whether it's ZWJ, ZWNJ, or something else.
198 * - For Ws: index of which space character this is, if space fallback
199 * is needed, ie. we don't set this by default, only if asked to.
200 */
201
202enum hb_unicode_props_flags_t {
203 UPROPS_MASK_GEN_CAT = 0x001Fu,
204 UPROPS_MASK_IGNORABLE = 0x0020u,
205 UPROPS_MASK_HIDDEN = 0x0040u, /* MONGOLIAN FREE VARIATION SELECTOR 1..3, or TAG characters */
206 UPROPS_MASK_CONTINUATION=0x0080u,
207
208 /* If GEN_CAT=FORMAT, top byte masks: */
209 UPROPS_MASK_Cf_ZWJ = 0x0100u,
210 UPROPS_MASK_Cf_ZWNJ = 0x0200u
211};
212HB_MARK_AS_FLAG_T (hb_unicode_props_flags_t);
213
214static inline void
215_hb_glyph_info_set_unicode_props (hb_glyph_info_t *info, hb_buffer_t *buffer)
216{
217 hb_unicode_funcs_t *unicode = buffer->unicode;
218 unsigned int u = info->codepoint;
219 unsigned int gen_cat = (unsigned int) unicode->general_category (u);
220 unsigned int props = gen_cat;
221
222 if (u >= 0x80u)
223 {
224 buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_NON_ASCII;
225
226 if (unlikely (unicode->is_default_ignorable (u)))
227 {
228 buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_DEFAULT_IGNORABLES;
229 props |= UPROPS_MASK_IGNORABLE;
230 if (u == 0x200Cu) props |= UPROPS_MASK_Cf_ZWNJ;
231 else if (u == 0x200Du) props |= UPROPS_MASK_Cf_ZWJ;
232 /* Mongolian Free Variation Selectors need to be remembered
233 * because although we need to hide them like default-ignorables,
234 * they need to non-ignorable during shaping. This is similar to
235 * what we do for joiners in Indic-like shapers, but since the
236 * FVSes are GC=Mn, we have use a separate bit to remember them.
237 * Fixes:
238 * https://github.com/harfbuzz/harfbuzz/issues/234 */
239 else if (unlikely (hb_in_range<hb_codepoint_t> (u, 0x180Bu, 0x180Du))) props |= UPROPS_MASK_HIDDEN;
240 /* TAG characters need similar treatment. Fixes:
241 * https://github.com/harfbuzz/harfbuzz/issues/463 */
242 else if (unlikely (hb_in_range<hb_codepoint_t> (u, 0xE0020u, 0xE007Fu))) props |= UPROPS_MASK_HIDDEN;
243 /* COMBINING GRAPHEME JOINER should not be skipped; at least some times.
244 * https://github.com/harfbuzz/harfbuzz/issues/554 */
245 else if (unlikely (u == 0x034Fu))
246 {
247 buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_CGJ;
248 props |= UPROPS_MASK_HIDDEN;
249 }
250 }
251
252 if (unlikely (HB_UNICODE_GENERAL_CATEGORY_IS_MARK (gen_cat)))
253 {
254 props |= UPROPS_MASK_CONTINUATION;
255 props |= unicode->modified_combining_class (u)<<8;
256 }
257 }
258
259 info->unicode_props() = props;
260}
261
262static inline void
263_hb_glyph_info_set_general_category (hb_glyph_info_t *info,
264 hb_unicode_general_category_t gen_cat)
265{
266 /* Clears top-byte. */
267 info->unicode_props() = (unsigned int) gen_cat | (info->unicode_props() & (0xFF & ~UPROPS_MASK_GEN_CAT));
268}
269
270static inline hb_unicode_general_category_t
271_hb_glyph_info_get_general_category (const hb_glyph_info_t *info)
272{
273 return (hb_unicode_general_category_t) (info->unicode_props() & UPROPS_MASK_GEN_CAT);
274}
275
276static inline bool
277_hb_glyph_info_is_unicode_mark (const hb_glyph_info_t *info)
278{
279 return HB_UNICODE_GENERAL_CATEGORY_IS_MARK (info->unicode_props() & UPROPS_MASK_GEN_CAT);
280}
281static inline void
282_hb_glyph_info_set_modified_combining_class (hb_glyph_info_t *info,
283 unsigned int modified_class)
284{
285 if (unlikely (!_hb_glyph_info_is_unicode_mark (info)))
286 return;
287 info->unicode_props() = (modified_class<<8) | (info->unicode_props() & 0xFF);
288}
289static inline unsigned int
290_hb_glyph_info_get_modified_combining_class (const hb_glyph_info_t *info)
291{
292 return _hb_glyph_info_is_unicode_mark (info) ? info->unicode_props()>>8 : 0;
293}
294#define info_cc(info) (_hb_glyph_info_get_modified_combining_class (&(info)))
295
296static inline bool
297_hb_glyph_info_is_unicode_space (const hb_glyph_info_t *info)
298{
299 return _hb_glyph_info_get_general_category (info) ==
300 HB_UNICODE_GENERAL_CATEGORY_SPACE_SEPARATOR;
301}
302static inline void
303_hb_glyph_info_set_unicode_space_fallback_type (hb_glyph_info_t *info, hb_unicode_funcs_t::space_t s)
304{
305 if (unlikely (!_hb_glyph_info_is_unicode_space (info)))
306 return;
307 info->unicode_props() = (((unsigned int) s)<<8) | (info->unicode_props() & 0xFF);
308}
309static inline hb_unicode_funcs_t::space_t
310_hb_glyph_info_get_unicode_space_fallback_type (const hb_glyph_info_t *info)
311{
312 return _hb_glyph_info_is_unicode_space (info) ?
313 (hb_unicode_funcs_t::space_t) (info->unicode_props()>>8) :
314 hb_unicode_funcs_t::NOT_SPACE;
315}
316
317static inline bool _hb_glyph_info_ligated (const hb_glyph_info_t *info);
318
319static inline bool
320_hb_glyph_info_is_default_ignorable (const hb_glyph_info_t *info)
321{
322 return (info->unicode_props() & UPROPS_MASK_IGNORABLE) &&
323 !_hb_glyph_info_ligated (info);
324}
325static inline bool
326_hb_glyph_info_is_default_ignorable_and_not_hidden (const hb_glyph_info_t *info)
327{
328 return ((info->unicode_props() & (UPROPS_MASK_IGNORABLE|UPROPS_MASK_HIDDEN))
329 == UPROPS_MASK_IGNORABLE) &&
330 !_hb_glyph_info_ligated (info);
331}
332static inline void
333_hb_glyph_info_unhide (hb_glyph_info_t *info)
334{
335 info->unicode_props() &= ~ UPROPS_MASK_HIDDEN;
336}
337
338static inline void
339_hb_glyph_info_set_continuation (hb_glyph_info_t *info)
340{
341 info->unicode_props() |= UPROPS_MASK_CONTINUATION;
342}
343static inline void
344_hb_glyph_info_reset_continuation (hb_glyph_info_t *info)
345{
346 info->unicode_props() &= ~ UPROPS_MASK_CONTINUATION;
347}
348static inline bool
349_hb_glyph_info_is_continuation (const hb_glyph_info_t *info)
350{
351 return info->unicode_props() & UPROPS_MASK_CONTINUATION;
352}
353/* Loop over grapheme. Based on foreach_cluster(). */
354#define foreach_grapheme(buffer, start, end) \
355 for (unsigned int \
356 _count = buffer->len, \
357 start = 0, end = _count ? _hb_next_grapheme (buffer, 0) : 0; \
358 start < _count; \
359 start = end, end = _hb_next_grapheme (buffer, start))
360
361static inline unsigned int
362_hb_next_grapheme (hb_buffer_t *buffer, unsigned int start)
363{
364 hb_glyph_info_t *info = buffer->info;
365 unsigned int count = buffer->len;
366
367 while (++start < count && _hb_glyph_info_is_continuation (&info[start]))
368 ;
369
370 return start;
371}
372
373static inline bool
374_hb_glyph_info_is_unicode_format (const hb_glyph_info_t *info)
375{
376 return _hb_glyph_info_get_general_category (info) ==
377 HB_UNICODE_GENERAL_CATEGORY_FORMAT;
378}
379static inline bool
380_hb_glyph_info_is_zwnj (const hb_glyph_info_t *info)
381{
382 return _hb_glyph_info_is_unicode_format (info) && (info->unicode_props() & UPROPS_MASK_Cf_ZWNJ);
383}
384static inline bool
385_hb_glyph_info_is_zwj (const hb_glyph_info_t *info)
386{
387 return _hb_glyph_info_is_unicode_format (info) && (info->unicode_props() & UPROPS_MASK_Cf_ZWJ);
388}
389static inline bool
390_hb_glyph_info_is_joiner (const hb_glyph_info_t *info)
391{
392 return _hb_glyph_info_is_unicode_format (info) && (info->unicode_props() & (UPROPS_MASK_Cf_ZWNJ|UPROPS_MASK_Cf_ZWJ));
393}
394static inline void
395_hb_glyph_info_flip_joiners (hb_glyph_info_t *info)
396{
397 if (!_hb_glyph_info_is_unicode_format (info))
398 return;
399 info->unicode_props() ^= UPROPS_MASK_Cf_ZWNJ | UPROPS_MASK_Cf_ZWJ;
400}
401
402/* lig_props: aka lig_id / lig_comp
403 *
404 * When a ligature is formed:
405 *
406 * - The ligature glyph and any marks in between all the same newly allocated
407 * lig_id,
408 * - The ligature glyph will get lig_num_comps set to the number of components
409 * - The marks get lig_comp > 0, reflecting which component of the ligature
410 * they were applied to.
411 * - This is used in GPOS to attach marks to the right component of a ligature
412 * in MarkLigPos,
413 * - Note that when marks are ligated together, much of the above is skipped
414 * and the current lig_id reused.
415 *
416 * When a multiple-substitution is done:
417 *
418 * - All resulting glyphs will have lig_id = 0,
419 * - The resulting glyphs will have lig_comp = 0, 1, 2, ... respectively.
420 * - This is used in GPOS to attach marks to the first component of a
421 * multiple substitution in MarkBasePos.
422 *
423 * The numbers are also used in GPOS to do mark-to-mark positioning only
424 * to marks that belong to the same component of the same ligature.
425 */
426
427static inline void
428_hb_glyph_info_clear_lig_props (hb_glyph_info_t *info)
429{
430 info->lig_props() = 0;
431}
432
433#define IS_LIG_BASE 0x10
434
435static inline void
436_hb_glyph_info_set_lig_props_for_ligature (hb_glyph_info_t *info,
437 unsigned int lig_id,
438 unsigned int lig_num_comps)
439{
440 info->lig_props() = (lig_id << 5) | IS_LIG_BASE | (lig_num_comps & 0x0F);
441}
442
443static inline void
444_hb_glyph_info_set_lig_props_for_mark (hb_glyph_info_t *info,
445 unsigned int lig_id,
446 unsigned int lig_comp)
447{
448 info->lig_props() = (lig_id << 5) | (lig_comp & 0x0F);
449}
450
451static inline void
452_hb_glyph_info_set_lig_props_for_component (hb_glyph_info_t *info, unsigned int comp)
453{
454 _hb_glyph_info_set_lig_props_for_mark (info, 0, comp);
455}
456
457static inline unsigned int
458_hb_glyph_info_get_lig_id (const hb_glyph_info_t *info)
459{
460 return info->lig_props() >> 5;
461}
462
463static inline bool
464_hb_glyph_info_ligated_internal (const hb_glyph_info_t *info)
465{
466 return !!(info->lig_props() & IS_LIG_BASE);
467}
468
469static inline unsigned int
470_hb_glyph_info_get_lig_comp (const hb_glyph_info_t *info)
471{
472 if (_hb_glyph_info_ligated_internal (info))
473 return 0;
474 else
475 return info->lig_props() & 0x0F;
476}
477
478static inline unsigned int
479_hb_glyph_info_get_lig_num_comps (const hb_glyph_info_t *info)
480{
481 if ((info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE) &&
482 _hb_glyph_info_ligated_internal (info))
483 return info->lig_props() & 0x0F;
484 else
485 return 1;
486}
487
488static inline uint8_t
489_hb_allocate_lig_id (hb_buffer_t *buffer) {
490 uint8_t lig_id = buffer->next_serial () & 0x07;
491 if (unlikely (!lig_id))
492 lig_id = _hb_allocate_lig_id (buffer); /* in case of overflow */
493 return lig_id;
494}
495
496/* glyph_props: */
497
498static inline void
499_hb_glyph_info_set_glyph_props (hb_glyph_info_t *info, unsigned int props)
500{
501 info->glyph_props() = props;
502}
503
504static inline unsigned int
505_hb_glyph_info_get_glyph_props (const hb_glyph_info_t *info)
506{
507 return info->glyph_props();
508}
509
510static inline bool
511_hb_glyph_info_is_base_glyph (const hb_glyph_info_t *info)
512{
513 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH);
514}
515
516static inline bool
517_hb_glyph_info_is_ligature (const hb_glyph_info_t *info)
518{
519 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE);
520}
521
522static inline bool
523_hb_glyph_info_is_mark (const hb_glyph_info_t *info)
524{
525 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_MARK);
526}
527
528static inline bool
529_hb_glyph_info_substituted (const hb_glyph_info_t *info)
530{
531 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED);
532}
533
534static inline bool
535_hb_glyph_info_ligated (const hb_glyph_info_t *info)
536{
537 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATED);
538}
539
540static inline bool
541_hb_glyph_info_multiplied (const hb_glyph_info_t *info)
542{
543 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED);
544}
545
546static inline bool
547_hb_glyph_info_ligated_and_didnt_multiply (const hb_glyph_info_t *info)
548{
549 return _hb_glyph_info_ligated (info) && !_hb_glyph_info_multiplied (info);
550}
551
552static inline void
553_hb_glyph_info_clear_ligated_and_multiplied (hb_glyph_info_t *info)
554{
555 info->glyph_props() &= ~(HB_OT_LAYOUT_GLYPH_PROPS_LIGATED |
556 HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED);
557}
558
559static inline void
560_hb_glyph_info_clear_substituted (hb_glyph_info_t *info)
561{
562 info->glyph_props() &= ~(HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED);
563}
564
565static inline void
566_hb_clear_substitution_flags (const hb_ot_shape_plan_t *plan HB_UNUSED,
567 hb_font_t *font HB_UNUSED,
568 hb_buffer_t *buffer)
569{
570 hb_glyph_info_t *info = buffer->info;
571 unsigned int count = buffer->len;
572 for (unsigned int i = 0; i < count; i++)
573 _hb_glyph_info_clear_substituted (&info[i]);
574}
575
576
577/* Allocation / deallocation. */
578
579static inline void
580_hb_buffer_allocate_unicode_vars (hb_buffer_t *buffer)
581{
582 HB_BUFFER_ALLOCATE_VAR (buffer, unicode_props);
583}
584
585static inline void
586_hb_buffer_deallocate_unicode_vars (hb_buffer_t *buffer)
587{
588 HB_BUFFER_DEALLOCATE_VAR (buffer, unicode_props);
589}
590
591static inline void
592_hb_buffer_assert_unicode_vars (hb_buffer_t *buffer)
593{
594 HB_BUFFER_ASSERT_VAR (buffer, unicode_props);
595}
596
597static inline void
598_hb_buffer_allocate_gsubgpos_vars (hb_buffer_t *buffer)
599{
600 HB_BUFFER_ALLOCATE_VAR (buffer, glyph_props);
601 HB_BUFFER_ALLOCATE_VAR (buffer, lig_props);
602 HB_BUFFER_ALLOCATE_VAR (buffer, syllable);
603}
604
605static inline void
606_hb_buffer_deallocate_gsubgpos_vars (hb_buffer_t *buffer)
607{
608 HB_BUFFER_DEALLOCATE_VAR (buffer, syllable);
609 HB_BUFFER_DEALLOCATE_VAR (buffer, lig_props);
610 HB_BUFFER_DEALLOCATE_VAR (buffer, glyph_props);
611}
612
613static inline void
614_hb_buffer_assert_gsubgpos_vars (hb_buffer_t *buffer)
615{
616 HB_BUFFER_ASSERT_VAR (buffer, glyph_props);
617 HB_BUFFER_ASSERT_VAR (buffer, lig_props);
618 HB_BUFFER_ASSERT_VAR (buffer, syllable);
619}
620
621/* Make sure no one directly touches our props... */
622#undef unicode_props0
623#undef unicode_props1
624#undef lig_props
625#undef glyph_props
626
627#endif /* HB_OT_LAYOUT_HH */
628