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-set-digest.hh"
38
39
40namespace OT
41{
42 struct GDEF;
43 struct GSUB;
44 struct GPOS;
45}
46
47HB_INTERNAL const OT::GDEF& _get_gdef (hb_face_t *face);
48HB_INTERNAL const OT::GSUB& _get_gsub_relaxed (hb_face_t *face);
49HB_INTERNAL const OT::GPOS& _get_gpos_relaxed (hb_face_t *face);
50
51
52/* Private API corresponding to hb-ot-layout.h: */
53
54HB_INTERNAL hb_bool_t
55hb_ot_layout_table_find_feature (hb_face_t *face,
56 hb_tag_t table_tag,
57 hb_tag_t feature_tag,
58 unsigned int *feature_index);
59
60
61/*
62 * GDEF
63 */
64
65enum hb_ot_layout_glyph_props_flags_t
66{
67 /* The following three match LookupFlags::Ignore* numbers. */
68 HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH = 0x02u,
69 HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE = 0x04u,
70 HB_OT_LAYOUT_GLYPH_PROPS_MARK = 0x08u,
71
72 /* The following are used internally; not derived from GDEF. */
73 HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED = 0x10u,
74 HB_OT_LAYOUT_GLYPH_PROPS_LIGATED = 0x20u,
75 HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED = 0x40u,
76
77 HB_OT_LAYOUT_GLYPH_PROPS_PRESERVE = HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED |
78 HB_OT_LAYOUT_GLYPH_PROPS_LIGATED |
79 HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED
80};
81HB_MARK_AS_FLAG_T (hb_ot_layout_glyph_props_flags_t);
82
83
84/*
85 * GSUB/GPOS
86 */
87
88HB_INTERNAL hb_bool_t
89hb_ot_layout_lookup_would_substitute_fast (hb_face_t *face,
90 unsigned int lookup_index,
91 const hb_codepoint_t *glyphs,
92 unsigned int glyphs_length,
93 hb_bool_t zero_context);
94
95
96/* Should be called before all the substitute_lookup's are done. */
97HB_INTERNAL void
98hb_ot_layout_substitute_start (hb_font_t *font,
99 hb_buffer_t *buffer);
100
101
102struct hb_ot_layout_lookup_accelerator_t
103{
104 template <typename TLookup>
105 inline void init (const TLookup &lookup)
106 {
107 digest.init ();
108 lookup.add_coverage (&digest);
109 }
110 inline void fini (void) {}
111
112 inline bool may_have (hb_codepoint_t g) const
113 { return digest.may_have (g); }
114
115 private:
116 hb_set_digest_t digest;
117};
118
119namespace OT {
120 struct hb_ot_apply_context_t;
121 struct SubstLookup;
122}
123
124HB_INTERNAL void
125hb_ot_layout_substitute_lookup (OT::hb_ot_apply_context_t *c,
126 const OT::SubstLookup &lookup,
127 const hb_ot_layout_lookup_accelerator_t &accel);
128
129
130/* Should be called before all the position_lookup's are done. */
131HB_INTERNAL void
132hb_ot_layout_position_start (hb_font_t *font,
133 hb_buffer_t *buffer);
134
135/* Should be called after all the position_lookup's are done, to fini advances. */
136HB_INTERNAL void
137hb_ot_layout_position_finish_advances (hb_font_t *font,
138 hb_buffer_t *buffer);
139
140/* Should be called after hb_ot_layout_position_finish_advances, to fini offsets. */
141HB_INTERNAL void
142hb_ot_layout_position_finish_offsets (hb_font_t *font,
143 hb_buffer_t *buffer);
144
145
146/*
147 * Buffer var routines.
148 */
149
150/* buffer var allocations, used during the entire shaping process */
151#define unicode_props() var2.u16[0]
152
153/* buffer var allocations, used during the GSUB/GPOS processing */
154#define glyph_props() var1.u16[0] /* GDEF glyph properties */
155#define lig_props() var1.u8[2] /* GSUB/GPOS ligature tracking */
156#define syllable() var1.u8[3] /* GSUB/GPOS shaping boundaries */
157
158
159/* Loop over syllables. Based on foreach_cluster(). */
160#define foreach_syllable(buffer, start, end) \
161 for (unsigned int \
162 _count = buffer->len, \
163 start = 0, end = _count ? _next_syllable (buffer, 0) : 0; \
164 start < _count; \
165 start = end, end = _next_syllable (buffer, start))
166
167static inline unsigned int
168_next_syllable (hb_buffer_t *buffer, unsigned int start)
169{
170 hb_glyph_info_t *info = buffer->info;
171 unsigned int count = buffer->len;
172
173 unsigned int syllable = info[start].syllable();
174 while (++start < count && syllable == info[start].syllable())
175 ;
176
177 return start;
178}
179
180
181/* unicode_props */
182
183/* Design:
184 * unicode_props() is a two-byte number. The low byte includes:
185 * - General_Category: 5 bits.
186 * - A bit each for:
187 * * Is it Default_Ignorable(); we have a modified Default_Ignorable().
188 * * Whether it's one of the three Mongolian Free Variation Selectors,
189 * CGJ, or other characters that are hidden but should not be ignored
190 * like most other Default_Ignorable()s do during matching.
191 * * One free bit right now.
192 *
193 * The high-byte has different meanings, switched by the Gen-Cat:
194 * - For Mn,Mc,Me: the modified Combining_Class.
195 * - For Cf: whether it's ZWJ, ZWNJ, or something else.
196 * - For Ws: index of which space character this is, if space fallback
197 * is needed, ie. we don't set this by default, only if asked to.
198 */
199
200enum hb_unicode_props_flags_t {
201 UPROPS_MASK_GEN_CAT = 0x001Fu,
202 UPROPS_MASK_IGNORABLE = 0x0020u,
203 UPROPS_MASK_HIDDEN = 0x0040u, /* MONGOLIAN FREE VARIATION SELECTOR 1..3,
204 * or TAG characters */
205
206 /* If GEN_CAT=FORMAT, top byte masks: */
207 UPROPS_MASK_Cf_ZWJ = 0x0100u,
208 UPROPS_MASK_Cf_ZWNJ = 0x0200u
209};
210HB_MARK_AS_FLAG_T (hb_unicode_props_flags_t);
211
212static inline void
213_hb_glyph_info_set_unicode_props (hb_glyph_info_t *info, hb_buffer_t *buffer)
214{
215 hb_unicode_funcs_t *unicode = buffer->unicode;
216 unsigned int u = info->codepoint;
217 unsigned int gen_cat = (unsigned int) unicode->general_category (u);
218 unsigned int props = gen_cat;
219
220 if (u >= 0x80)
221 {
222 buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_NON_ASCII;
223 if (unlikely (unicode->is_default_ignorable (u)))
224 {
225 buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_DEFAULT_IGNORABLES;
226 props |= UPROPS_MASK_IGNORABLE;
227 if (u == 0x200Cu) props |= UPROPS_MASK_Cf_ZWNJ;
228 else if (u == 0x200Du) props |= UPROPS_MASK_Cf_ZWJ;
229 /* Mongolian Free Variation Selectors need to be remembered
230 * because although we need to hide them like default-ignorables,
231 * they need to non-ignorable during shaping. This is similar to
232 * what we do for joiners in Indic-like shapers, but since the
233 * FVSes are GC=Mn, we have use a separate bit to remember them.
234 * Fixes:
235 * https://github.com/harfbuzz/harfbuzz/issues/234 */
236 else if (unlikely (hb_in_range (u, 0x180Bu, 0x180Du))) props |= UPROPS_MASK_HIDDEN;
237 /* TAG characters need similar treatment. Fixes:
238 * https://github.com/harfbuzz/harfbuzz/issues/463 */
239 else if (unlikely (hb_in_range (u, 0xE0020u, 0xE007Fu))) props |= UPROPS_MASK_HIDDEN;
240 /* COMBINING GRAPHEME JOINER should not be skipped; at least some times.
241 * https://github.com/harfbuzz/harfbuzz/issues/554 */
242 else if (unlikely (u == 0x034Fu))
243 {
244 buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_CGJ;
245 props |= UPROPS_MASK_HIDDEN;
246 }
247 }
248 else if (unlikely (HB_UNICODE_GENERAL_CATEGORY_IS_NON_ENCLOSING_MARK_OR_MODIFIER_SYMBOL (gen_cat)))
249 {
250 /* The above check is just an optimization to let in only things we need further
251 * processing on. */
252
253 /* Only Mn and Mc can have non-zero ccc:
254 * https://unicode.org/policies/stability_policy.html#Property_Value
255 * """
256 * Canonical_Combining_Class, General_Category
257 * All characters other than those with General_Category property values
258 * Spacing_Mark (Mc) and Nonspacing_Mark (Mn) have the Canonical_Combining_Class
259 * property value 0.
260 * 1.1.5+
261 * """
262 *
263 * Also, all Mn's that are Default_Ignorable, have ccc=0, hence
264 * the "else if".
265 */
266 props |= unicode->modified_combining_class (info->codepoint)<<8;
267
268 /* Recategorize emoji skin-tone modifiers as Unicode mark, so they
269 * behave correctly in non-native directionality. They originally
270 * are MODIFIER_SYMBOL. Fixes:
271 * https://github.com/harfbuzz/harfbuzz/issues/169
272 */
273 if (unlikely (hb_in_range (u, 0x1F3FBu, 0x1F3FFu)))
274 {
275 props = gen_cat = HB_UNICODE_GENERAL_CATEGORY_ENCLOSING_MARK;
276 }
277 }
278 }
279
280 info->unicode_props() = props;
281}
282
283static inline void
284_hb_glyph_info_set_general_category (hb_glyph_info_t *info,
285 hb_unicode_general_category_t gen_cat)
286{
287 /* Clears top-byte. */
288 info->unicode_props() = (unsigned int) gen_cat | (info->unicode_props() & (0xFF & ~UPROPS_MASK_GEN_CAT));
289}
290
291static inline hb_unicode_general_category_t
292_hb_glyph_info_get_general_category (const hb_glyph_info_t *info)
293{
294 return (hb_unicode_general_category_t) (info->unicode_props() & UPROPS_MASK_GEN_CAT);
295}
296
297static inline bool
298_hb_glyph_info_is_unicode_mark (const hb_glyph_info_t *info)
299{
300 return HB_UNICODE_GENERAL_CATEGORY_IS_MARK (info->unicode_props() & UPROPS_MASK_GEN_CAT);
301}
302static inline void
303_hb_glyph_info_set_modified_combining_class (hb_glyph_info_t *info,
304 unsigned int modified_class)
305{
306 if (unlikely (!_hb_glyph_info_is_unicode_mark (info)))
307 return;
308 info->unicode_props() = (modified_class<<8) | (info->unicode_props() & 0xFF);
309}
310static inline unsigned int
311_hb_glyph_info_get_modified_combining_class (const hb_glyph_info_t *info)
312{
313 return _hb_glyph_info_is_unicode_mark (info) ? info->unicode_props()>>8 : 0;
314}
315
316
317/* Loop over grapheme. Based on foreach_cluster(). */
318#define foreach_grapheme(buffer, start, end) \
319 for (unsigned int \
320 _count = buffer->len, \
321 start = 0, end = _count ? _next_grapheme (buffer, 0) : 0; \
322 start < _count; \
323 start = end, end = _next_grapheme (buffer, start))
324
325static inline unsigned int
326_next_grapheme (hb_buffer_t *buffer, unsigned int start)
327{
328 hb_glyph_info_t *info = buffer->info;
329 unsigned int count = buffer->len;
330
331 while (++start < count && _hb_glyph_info_is_unicode_mark (&info[start]))
332 ;
333
334 return start;
335}
336
337
338#define info_cc(info) (_hb_glyph_info_get_modified_combining_class (&(info)))
339
340static inline bool
341_hb_glyph_info_is_unicode_space (const hb_glyph_info_t *info)
342{
343 return _hb_glyph_info_get_general_category (info) ==
344 HB_UNICODE_GENERAL_CATEGORY_SPACE_SEPARATOR;
345}
346static inline void
347_hb_glyph_info_set_unicode_space_fallback_type (hb_glyph_info_t *info, hb_unicode_funcs_t::space_t s)
348{
349 if (unlikely (!_hb_glyph_info_is_unicode_space (info)))
350 return;
351 info->unicode_props() = (((unsigned int) s)<<8) | (info->unicode_props() & 0xFF);
352}
353static inline hb_unicode_funcs_t::space_t
354_hb_glyph_info_get_unicode_space_fallback_type (const hb_glyph_info_t *info)
355{
356 return _hb_glyph_info_is_unicode_space (info) ?
357 (hb_unicode_funcs_t::space_t) (info->unicode_props()>>8) :
358 hb_unicode_funcs_t::NOT_SPACE;
359}
360
361static inline bool _hb_glyph_info_ligated (const hb_glyph_info_t *info);
362
363static inline hb_bool_t
364_hb_glyph_info_is_default_ignorable (const hb_glyph_info_t *info)
365{
366 return (info->unicode_props() & UPROPS_MASK_IGNORABLE) &&
367 !_hb_glyph_info_ligated (info);
368}
369static inline hb_bool_t
370_hb_glyph_info_is_default_ignorable_and_not_hidden (const hb_glyph_info_t *info)
371{
372 return ((info->unicode_props() & (UPROPS_MASK_IGNORABLE|UPROPS_MASK_HIDDEN))
373 == UPROPS_MASK_IGNORABLE) &&
374 !_hb_glyph_info_ligated (info);
375}
376static inline void
377_hb_glyph_info_unhide (hb_glyph_info_t *info)
378{
379 info->unicode_props() &= ~ UPROPS_MASK_HIDDEN;
380}
381
382static inline bool
383_hb_glyph_info_is_unicode_format (const hb_glyph_info_t *info)
384{
385 return _hb_glyph_info_get_general_category (info) ==
386 HB_UNICODE_GENERAL_CATEGORY_FORMAT;
387}
388static inline hb_bool_t
389_hb_glyph_info_is_zwnj (const hb_glyph_info_t *info)
390{
391 return _hb_glyph_info_is_unicode_format (info) && (info->unicode_props() & UPROPS_MASK_Cf_ZWNJ);
392}
393static inline hb_bool_t
394_hb_glyph_info_is_zwj (const hb_glyph_info_t *info)
395{
396 return _hb_glyph_info_is_unicode_format (info) && (info->unicode_props() & UPROPS_MASK_Cf_ZWJ);
397}
398static inline hb_bool_t
399_hb_glyph_info_is_joiner (const hb_glyph_info_t *info)
400{
401 return _hb_glyph_info_is_unicode_format (info) && (info->unicode_props() & (UPROPS_MASK_Cf_ZWNJ|UPROPS_MASK_Cf_ZWJ));
402}
403static inline void
404_hb_glyph_info_flip_joiners (hb_glyph_info_t *info)
405{
406 if (!_hb_glyph_info_is_unicode_format (info))
407 return;
408 info->unicode_props() ^= UPROPS_MASK_Cf_ZWNJ | UPROPS_MASK_Cf_ZWJ;
409}
410
411/* lig_props: aka lig_id / lig_comp
412 *
413 * When a ligature is formed:
414 *
415 * - The ligature glyph and any marks in between all the same newly allocated
416 * lig_id,
417 * - The ligature glyph will get lig_num_comps set to the number of components
418 * - The marks get lig_comp > 0, reflecting which component of the ligature
419 * they were applied to.
420 * - This is used in GPOS to attach marks to the right component of a ligature
421 * in MarkLigPos,
422 * - Note that when marks are ligated together, much of the above is skipped
423 * and the current lig_id reused.
424 *
425 * When a multiple-substitution is done:
426 *
427 * - All resulting glyphs will have lig_id = 0,
428 * - The resulting glyphs will have lig_comp = 0, 1, 2, ... respectively.
429 * - This is used in GPOS to attach marks to the first component of a
430 * multiple substitution in MarkBasePos.
431 *
432 * The numbers are also used in GPOS to do mark-to-mark positioning only
433 * to marks that belong to the same component of the same ligature.
434 */
435
436static inline void
437_hb_glyph_info_clear_lig_props (hb_glyph_info_t *info)
438{
439 info->lig_props() = 0;
440}
441
442#define IS_LIG_BASE 0x10
443
444static inline void
445_hb_glyph_info_set_lig_props_for_ligature (hb_glyph_info_t *info,
446 unsigned int lig_id,
447 unsigned int lig_num_comps)
448{
449 info->lig_props() = (lig_id << 5) | IS_LIG_BASE | (lig_num_comps & 0x0F);
450}
451
452static inline void
453_hb_glyph_info_set_lig_props_for_mark (hb_glyph_info_t *info,
454 unsigned int lig_id,
455 unsigned int lig_comp)
456{
457 info->lig_props() = (lig_id << 5) | (lig_comp & 0x0F);
458}
459
460static inline void
461_hb_glyph_info_set_lig_props_for_component (hb_glyph_info_t *info, unsigned int comp)
462{
463 _hb_glyph_info_set_lig_props_for_mark (info, 0, comp);
464}
465
466static inline unsigned int
467_hb_glyph_info_get_lig_id (const hb_glyph_info_t *info)
468{
469 return info->lig_props() >> 5;
470}
471
472static inline bool
473_hb_glyph_info_ligated_internal (const hb_glyph_info_t *info)
474{
475 return !!(info->lig_props() & IS_LIG_BASE);
476}
477
478static inline unsigned int
479_hb_glyph_info_get_lig_comp (const hb_glyph_info_t *info)
480{
481 if (_hb_glyph_info_ligated_internal (info))
482 return 0;
483 else
484 return info->lig_props() & 0x0F;
485}
486
487static inline unsigned int
488_hb_glyph_info_get_lig_num_comps (const hb_glyph_info_t *info)
489{
490 if ((info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE) &&
491 _hb_glyph_info_ligated_internal (info))
492 return info->lig_props() & 0x0F;
493 else
494 return 1;
495}
496
497static inline uint8_t
498_hb_allocate_lig_id (hb_buffer_t *buffer) {
499 uint8_t lig_id = buffer->next_serial () & 0x07;
500 if (unlikely (!lig_id))
501 lig_id = _hb_allocate_lig_id (buffer); /* in case of overflow */
502 return lig_id;
503}
504
505/* glyph_props: */
506
507static inline void
508_hb_glyph_info_set_glyph_props (hb_glyph_info_t *info, unsigned int props)
509{
510 info->glyph_props() = props;
511}
512
513static inline unsigned int
514_hb_glyph_info_get_glyph_props (const hb_glyph_info_t *info)
515{
516 return info->glyph_props();
517}
518
519static inline bool
520_hb_glyph_info_is_base_glyph (const hb_glyph_info_t *info)
521{
522 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH);
523}
524
525static inline bool
526_hb_glyph_info_is_ligature (const hb_glyph_info_t *info)
527{
528 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE);
529}
530
531static inline bool
532_hb_glyph_info_is_mark (const hb_glyph_info_t *info)
533{
534 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_MARK);
535}
536
537static inline bool
538_hb_glyph_info_substituted (const hb_glyph_info_t *info)
539{
540 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED);
541}
542
543static inline bool
544_hb_glyph_info_ligated (const hb_glyph_info_t *info)
545{
546 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATED);
547}
548
549static inline bool
550_hb_glyph_info_multiplied (const hb_glyph_info_t *info)
551{
552 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED);
553}
554
555static inline bool
556_hb_glyph_info_ligated_and_didnt_multiply (const hb_glyph_info_t *info)
557{
558 return _hb_glyph_info_ligated (info) && !_hb_glyph_info_multiplied (info);
559}
560
561static inline void
562_hb_glyph_info_clear_ligated_and_multiplied (hb_glyph_info_t *info)
563{
564 info->glyph_props() &= ~(HB_OT_LAYOUT_GLYPH_PROPS_LIGATED |
565 HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED);
566}
567
568static inline void
569_hb_glyph_info_clear_substituted (hb_glyph_info_t *info)
570{
571 info->glyph_props() &= ~(HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED);
572}
573
574
575/* Allocation / deallocation. */
576
577static inline void
578_hb_buffer_allocate_unicode_vars (hb_buffer_t *buffer)
579{
580 HB_BUFFER_ALLOCATE_VAR (buffer, unicode_props);
581}
582
583static inline void
584_hb_buffer_deallocate_unicode_vars (hb_buffer_t *buffer)
585{
586 HB_BUFFER_DEALLOCATE_VAR (buffer, unicode_props);
587}
588
589static inline void
590_hb_buffer_assert_unicode_vars (hb_buffer_t *buffer)
591{
592 HB_BUFFER_ASSERT_VAR (buffer, unicode_props);
593}
594
595static inline void
596_hb_buffer_allocate_gsubgpos_vars (hb_buffer_t *buffer)
597{
598 HB_BUFFER_ALLOCATE_VAR (buffer, glyph_props);
599 HB_BUFFER_ALLOCATE_VAR (buffer, lig_props);
600 HB_BUFFER_ALLOCATE_VAR (buffer, syllable);
601}
602
603static inline void
604_hb_buffer_deallocate_gsubgpos_vars (hb_buffer_t *buffer)
605{
606 HB_BUFFER_DEALLOCATE_VAR (buffer, syllable);
607 HB_BUFFER_DEALLOCATE_VAR (buffer, lig_props);
608 HB_BUFFER_DEALLOCATE_VAR (buffer, glyph_props);
609}
610
611static inline void
612_hb_buffer_assert_gsubgpos_vars (hb_buffer_t *buffer)
613{
614 HB_BUFFER_ASSERT_VAR (buffer, glyph_props);
615 HB_BUFFER_ASSERT_VAR (buffer, lig_props);
616 HB_BUFFER_ASSERT_VAR (buffer, syllable);
617}
618
619/* Make sure no one directly touches our props... */
620#undef unicode_props0
621#undef unicode_props1
622#undef lig_props
623#undef glyph_props
624
625#endif /* HB_OT_LAYOUT_HH */
626