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_PRIVATE_HH
30 #define HB_OT_LAYOUT_PRIVATE_HH
31
32 #include "hb-private.hh"
33
34 #include "hb-font-private.hh"
35 #include "hb-buffer-private.hh"
36 #include "hb-set-private.hh"
37
38
39 /* Private API corresponding to hb-ot-layout.h: */
40
41 HB_INTERNAL hb_bool_t
42 hb_ot_layout_table_find_feature (hb_face_t *face,
43 hb_tag_t table_tag,
44 hb_tag_t feature_tag,
45 unsigned int *feature_index);
46
47
48 /*
49 * GDEF
50 */
51
52 enum hb_ot_layout_glyph_props_flags_t
53 {
54 /* The following three match LookupFlags::Ignore* numbers. */
55 HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH = 0x02u,
56 HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE = 0x04u,
57 HB_OT_LAYOUT_GLYPH_PROPS_MARK = 0x08u,
58
59 /* The following are used internally; not derived from GDEF. */
60 HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED = 0x10u,
61 HB_OT_LAYOUT_GLYPH_PROPS_LIGATED = 0x20u,
62 HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED = 0x40u,
63
64 HB_OT_LAYOUT_GLYPH_PROPS_PRESERVE = HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED |
65 HB_OT_LAYOUT_GLYPH_PROPS_LIGATED |
66 HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED
67 };
68 HB_MARK_AS_FLAG_T (hb_ot_layout_glyph_props_flags_t);
69
70
71 /*
72 * GSUB/GPOS
73 */
74
75 HB_INTERNAL hb_bool_t
76 hb_ot_layout_lookup_would_substitute_fast (hb_face_t *face,
77 unsigned int lookup_index,
78 const hb_codepoint_t *glyphs,
79 unsigned int glyphs_length,
80 hb_bool_t zero_context);
81
82
83 /* Should be called before all the substitute_lookup's are done. */
84 HB_INTERNAL void
85 hb_ot_layout_substitute_start (hb_font_t *font,
86 hb_buffer_t *buffer);
87
88
89 struct hb_ot_layout_lookup_accelerator_t;
90
91 namespace OT {
92 struct hb_apply_context_t;
93 struct SubstLookup;
94 }
95
96 HB_INTERNAL void
97 hb_ot_layout_substitute_lookup (OT::hb_apply_context_t *c,
98 const OT::SubstLookup &lookup,
99 const hb_ot_layout_lookup_accelerator_t &accel);
100
101
102 /* Should be called before all the position_lookup's are done. */
103 HB_INTERNAL void
104 hb_ot_layout_position_start (hb_font_t *font,
105 hb_buffer_t *buffer);
106
107 /* Should be called after all the position_lookup's are done, to finish advances. */
108 HB_INTERNAL void
109 hb_ot_layout_position_finish_advances (hb_font_t *font,
110 hb_buffer_t *buffer);
111
112 /* Should be called after hb_ot_layout_position_finish_advances, to finish offsets. */
113 HB_INTERNAL void
114 hb_ot_layout_position_finish_offsets (hb_font_t *font,
115 hb_buffer_t *buffer);
116
117
118
119 /*
120 * hb_ot_layout_t
121 */
122
123 namespace OT {
124 struct GDEF;
125 struct GSUB;
126 struct GPOS;
127 struct MATH;
128 }
129
130 struct hb_ot_layout_lookup_accelerator_t
131 {
132 template <typename TLookup>
133 inline void init (const TLookup &lookup)
134 {
135 digest.init ();
136 lookup.add_coverage (&digest);
137 }
138
139 inline void fini (void)
140 {
141 }
142
143 inline bool may_have (hb_codepoint_t g) const {
144 return digest.may_have (g);
145 }
146
147 private:
148 hb_set_digest_t digest;
149 };
150
151 struct hb_ot_layout_t
152 {
153 hb_blob_t *gdef_blob;
154 hb_blob_t *gsub_blob;
155 hb_blob_t *gpos_blob;
156 hb_blob_t *math_blob;
157
158 const struct OT::GDEF *gdef;
159 const struct OT::GSUB *gsub;
160 const struct OT::GPOS *gpos;
161 const struct OT::MATH *math;
162
163 unsigned int gsub_lookup_count;
164 unsigned int gpos_lookup_count;
165
166 hb_ot_layout_lookup_accelerator_t *gsub_accels;
167 hb_ot_layout_lookup_accelerator_t *gpos_accels;
168 };
169
170
171 HB_INTERNAL hb_ot_layout_t *
172 _hb_ot_layout_create (hb_face_t *face);
173
174 HB_INTERNAL void
175 _hb_ot_layout_destroy (hb_ot_layout_t *layout);
176
177
178 #define hb_ot_layout_from_face(face) ((hb_ot_layout_t *) face->shaper_data.ot)
179
180
181 /*
182 * Buffer var routines.
183 */
184
185 /* buffer var allocations, used during the entire shaping process */
186 #define unicode_props() var2.u16[0]
187
188 /* buffer var allocations, used during the GSUB/GPOS processing */
189 #define glyph_props() var1.u16[0] /* GDEF glyph properties */
190 #define lig_props() var1.u8[2] /* GSUB/GPOS ligature tracking */
191 #define syllable() var1.u8[3] /* GSUB/GPOS shaping boundaries */
192
193
194 /* loop over syllables */
195
196 #define foreach_syllable(buffer, start, end) \
197 for (unsigned int \
198 _count = buffer->len, \
199 start = 0, end = _count ? _next_syllable (buffer, 0) : 0; \
200 start < _count; \
201 start = end, end = _next_syllable (buffer, start))
202
203 static inline unsigned int
204 _next_syllable (hb_buffer_t *buffer, unsigned int start)
205 {
206 hb_glyph_info_t *info = buffer->info;
207 unsigned int count = buffer->len;
208
209 unsigned int syllable = info[start].syllable();
210 while (++start < count && syllable == info[start].syllable())
211 ;
212
213 return start;
214 }
215
216
217 /* unicode_props */
218
219 /* Design:
220 * unicode_props() is a two-byte number. The low byte includes:
221 * - General_Category: 5 bits.
222 * - A bit each for:
223 * * Is it Default_Ignorable(); we have a modified Default_Ignorable().
224 * * Whether it's one of the three Mongolian Free Variation Selectors.
225 * * One free bit right now.
226 *
227 * The high-byte has different meanings, switched by the Gen-Cat:
228 * - For Mn,Mc,Me: the modified Combining_Class.
229 * - For Cf: whether it's ZWJ, ZWNJ, or something else.
230 * - For Ws: index of which space character this is, if space fallback
231 * is needed, ie. we don't set this by default, only if asked to.
232 */
233
234 enum hb_unicode_props_flags_t {
235 UPROPS_MASK_GEN_CAT = 0x001Fu,
236 UPROPS_MASK_IGNORABLE = 0x0020u,
237 UPROPS_MASK_FVS = 0x0040u, /* MONGOLIAN FREE VARIATION SELECTOR 1..3 */
238
239 /* If GEN_CAT=FORMAT, top byte masks: */
240 UPROPS_MASK_Cf_ZWJ = 0x0100u,
241 UPROPS_MASK_Cf_ZWNJ = 0x0200u
242 };
243 HB_MARK_AS_FLAG_T (hb_unicode_props_flags_t);
244
245 static inline void
246 _hb_glyph_info_set_unicode_props (hb_glyph_info_t *info, hb_buffer_t *buffer)
247 {
248 hb_unicode_funcs_t *unicode = buffer->unicode;
249 unsigned int u = info->codepoint;
250 unsigned int gen_cat = (unsigned int) unicode->general_category (u);
251 unsigned int props = gen_cat;
252
253 if (u >= 0x80)
254 {
255 buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_NON_ASCII;
256 if (unlikely (unicode->is_default_ignorable (u)))
257 {
258 buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_DEFAULT_IGNORABLES;
259 props |= UPROPS_MASK_IGNORABLE;
260 if (u == 0x200Cu) props |= UPROPS_MASK_Cf_ZWNJ;
261 if (u == 0x200Du) props |= UPROPS_MASK_Cf_ZWJ;
262 /* Mongolian Free Variation Selectors need to be remembered
263 * because although we need to hide them like default-ignorables,
264 * they need to non-ignorable during shaping. This is similar to
265 * what we do for joiners in Indic-like shapers, but since the
266 * FVSes are GC=Mn, we have use a separate bit to remember them.
267 * Fixes:
268 * https://github.com/behdad/harfbuzz/issues/234
269 */
270 if (unlikely (hb_in_range (u, 0x180Bu, 0x180Du))) props |= UPROPS_MASK_FVS;
271 }
272 else if (unlikely (HB_UNICODE_GENERAL_CATEGORY_IS_NON_ENCLOSING_MARK_OR_MODIFIER_SYMBOL (gen_cat)))
273 {
274 /* The above check is just an optimization to let in only things we need further
275 * processing on. */
276
277 /* Only Mn and Mc can have non-zero ccc:
278 * http://www.unicode.org/policies/stability_policy.html#Property_Value
279 * """
280 * Canonical_Combining_Class, General_Category
281 * All characters other than those with General_Category property values
282 * Spacing_Mark (Mc) and Nonspacing_Mark (Mn) have the Canonical_Combining_Class
283 * property value 0.
284 * 1.1.5+
285 * """
286 *
287 * Also, all Mn's that are Default_Ignorable, have ccc=0, hence
288 * the "else if".
289 */
290 props |= unicode->modified_combining_class (info->codepoint)<<8;
291
292 /* Recategorize emoji skin-tone modifiers as Unicode mark, so they
293 * behave correctly in non-native directionality. They originally
294 * are MODIFIER_SYMBOL. Fixes:
295 * https://github.com/behdad/harfbuzz/issues/169
296 */
297 if (unlikely (hb_in_range (u, 0x1F3FBu, 0x1F3FFu)))
298 {
299 props = gen_cat = HB_UNICODE_GENERAL_CATEGORY_ENCLOSING_MARK;
300 }
301 }
302 }
303
304 info->unicode_props() = props;
305 }
306
307 static inline void
308 _hb_glyph_info_set_general_category (hb_glyph_info_t *info,
309 hb_unicode_general_category_t gen_cat)
310 {
311 /* Clears top-byte. */
312 info->unicode_props() = (unsigned int) gen_cat | (info->unicode_props() & (0xFF & ~UPROPS_MASK_GEN_CAT));
313 }
314
315 static inline hb_unicode_general_category_t
316 _hb_glyph_info_get_general_category (const hb_glyph_info_t *info)
317 {
318 return (hb_unicode_general_category_t) (info->unicode_props() & UPROPS_MASK_GEN_CAT);
319 }
320
321 static inline bool
322 _hb_glyph_info_is_unicode_mark (const hb_glyph_info_t *info)
323 {
324 return HB_UNICODE_GENERAL_CATEGORY_IS_MARK (info->unicode_props() & UPROPS_MASK_GEN_CAT);
325 }
326 static inline void
327 _hb_glyph_info_set_modified_combining_class (hb_glyph_info_t *info,
328 unsigned int modified_class)
329 {
330 if (unlikely (!_hb_glyph_info_is_unicode_mark (info)))
331 return;
332 info->unicode_props() = (modified_class<<8) | (info->unicode_props() & 0xFF);
333 }
334 static inline unsigned int
335 _hb_glyph_info_get_modified_combining_class (const hb_glyph_info_t *info)
336 {
337 return _hb_glyph_info_is_unicode_mark (info) ? info->unicode_props()>>8 : 0;
338 }
339
340 static 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 }
346 static 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 }
353 static 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
361 static inline bool _hb_glyph_info_ligated (const hb_glyph_info_t *info);
362
363 static 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 }
369 static inline hb_bool_t
370 _hb_glyph_info_is_default_ignorable_and_not_fvs (const hb_glyph_info_t *info)
371 {
372 return ((info->unicode_props() & (UPROPS_MASK_IGNORABLE|UPROPS_MASK_FVS))
373 == UPROPS_MASK_IGNORABLE) &&
374 !_hb_glyph_info_ligated (info);
375 }
376
377 static inline bool
378 _hb_glyph_info_is_unicode_format (const hb_glyph_info_t *info)
379 {
380 return _hb_glyph_info_get_general_category (info) ==
381 HB_UNICODE_GENERAL_CATEGORY_FORMAT;
382 }
383 static inline hb_bool_t
384 _hb_glyph_info_is_zwnj (const hb_glyph_info_t *info)
385 {
386 return _hb_glyph_info_is_unicode_format (info) && (info->unicode_props() & UPROPS_MASK_Cf_ZWNJ);
387 }
388 static inline hb_bool_t
389 _hb_glyph_info_is_zwj (const hb_glyph_info_t *info)
390 {
391 return _hb_glyph_info_is_unicode_format (info) && (info->unicode_props() & UPROPS_MASK_Cf_ZWJ);
392 }
393 static inline hb_bool_t
394 _hb_glyph_info_is_joiner (const hb_glyph_info_t *info)
395 {
396 return _hb_glyph_info_is_unicode_format (info) && (info->unicode_props() & (UPROPS_MASK_Cf_ZWNJ|UPROPS_MASK_Cf_ZWJ));
397 }
398 static inline void
399 _hb_glyph_info_flip_joiners (hb_glyph_info_t *info)
400 {
401 if (!_hb_glyph_info_is_unicode_format (info))
402 return;
403 info->unicode_props() ^= UPROPS_MASK_Cf_ZWNJ | UPROPS_MASK_Cf_ZWJ;
404 }
405
406 /* lig_props: aka lig_id / lig_comp
407 *
408 * When a ligature is formed:
409 *
410 * - The ligature glyph and any marks in between all the same newly allocated
411 * lig_id,
412 * - The ligature glyph will get lig_num_comps set to the number of components
413 * - The marks get lig_comp > 0, reflecting which component of the ligature
414 * they were applied to.
415 * - This is used in GPOS to attach marks to the right component of a ligature
416 * in MarkLigPos,
417 * - Note that when marks are ligated together, much of the above is skipped
418 * and the current lig_id reused.
419 *
420 * When a multiple-substitution is done:
421 *
422 * - All resulting glyphs will have lig_id = 0,
423 * - The resulting glyphs will have lig_comp = 0, 1, 2, ... respectively.
424 * - This is used in GPOS to attach marks to the first component of a
425 * multiple substitution in MarkBasePos.
426 *
427 * The numbers are also used in GPOS to do mark-to-mark positioning only
428 * to marks that belong to the same component of the same ligature.
429 */
430
431 static inline void
432 _hb_glyph_info_clear_lig_props (hb_glyph_info_t *info)
433 {
434 info->lig_props() = 0;
435 }
436
437 #define IS_LIG_BASE 0x10
438
439 static inline void
440 _hb_glyph_info_set_lig_props_for_ligature (hb_glyph_info_t *info,
441 unsigned int lig_id,
442 unsigned int lig_num_comps)
443 {
444 info->lig_props() = (lig_id << 5) | IS_LIG_BASE | (lig_num_comps & 0x0F);
445 }
446
447 static inline void
448 _hb_glyph_info_set_lig_props_for_mark (hb_glyph_info_t *info,
449 unsigned int lig_id,
450 unsigned int lig_comp)
451 {
452 info->lig_props() = (lig_id << 5) | (lig_comp & 0x0F);
453 }
454
455 static inline void
456 _hb_glyph_info_set_lig_props_for_component (hb_glyph_info_t *info, unsigned int comp)
457 {
458 _hb_glyph_info_set_lig_props_for_mark (info, 0, comp);
459 }
460
461 static inline unsigned int
462 _hb_glyph_info_get_lig_id (const hb_glyph_info_t *info)
463 {
464 return info->lig_props() >> 5;
465 }
466
467 static inline bool
468 _hb_glyph_info_ligated_internal (const hb_glyph_info_t *info)
469 {
470 return !!(info->lig_props() & IS_LIG_BASE);
471 }
472
473 static inline unsigned int
474 _hb_glyph_info_get_lig_comp (const hb_glyph_info_t *info)
475 {
476 if (_hb_glyph_info_ligated_internal (info))
477 return 0;
478 else
479 return info->lig_props() & 0x0F;
480 }
481
482 static inline unsigned int
483 _hb_glyph_info_get_lig_num_comps (const hb_glyph_info_t *info)
484 {
485 if ((info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE) &&
486 _hb_glyph_info_ligated_internal (info))
487 return info->lig_props() & 0x0F;
488 else
489 return 1;
490 }
491
492 static inline uint8_t
493 _hb_allocate_lig_id (hb_buffer_t *buffer) {
494 uint8_t lig_id = buffer->next_serial () & 0x07;
495 if (unlikely (!lig_id))
496 lig_id = _hb_allocate_lig_id (buffer); /* in case of overflow */
497 return lig_id;
498 }
499
500 /* glyph_props: */
501
502 static inline void
503 _hb_glyph_info_set_glyph_props (hb_glyph_info_t *info, unsigned int props)
504 {
505 info->glyph_props() = props;
506 }
507
508 static inline unsigned int
509 _hb_glyph_info_get_glyph_props (const hb_glyph_info_t *info)
510 {
511 return info->glyph_props();
512 }
513
514 static inline bool
515 _hb_glyph_info_is_base_glyph (const hb_glyph_info_t *info)
516 {
517 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH);
518 }
519
520 static inline bool
521 _hb_glyph_info_is_ligature (const hb_glyph_info_t *info)
522 {
523 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE);
524 }
525
526 static inline bool
527 _hb_glyph_info_is_mark (const hb_glyph_info_t *info)
528 {
529 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_MARK);
530 }
531
532 static inline bool
533 _hb_glyph_info_substituted (const hb_glyph_info_t *info)
534 {
535 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED);
536 }
537
538 static inline bool
539 _hb_glyph_info_ligated (const hb_glyph_info_t *info)
540 {
541 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATED);
542 }
543
544 static inline bool
545 _hb_glyph_info_multiplied (const hb_glyph_info_t *info)
546 {
547 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED);
548 }
549
550 static inline bool
551 _hb_glyph_info_ligated_and_didnt_multiply (const hb_glyph_info_t *info)
552 {
553 return _hb_glyph_info_ligated (info) && !_hb_glyph_info_multiplied (info);
554 }
555
556 static inline void
557 _hb_glyph_info_clear_ligated_and_multiplied (hb_glyph_info_t *info)
558 {
559 info->glyph_props() &= ~(HB_OT_LAYOUT_GLYPH_PROPS_LIGATED |
560 HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED);
561 }
562
563 static inline void
564 _hb_glyph_info_clear_substituted (hb_glyph_info_t *info)
565 {
566 info->glyph_props() &= ~(HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED);
567 }
568
569
570 /* Allocation / deallocation. */
571
572 static inline void
573 _hb_buffer_allocate_unicode_vars (hb_buffer_t *buffer)
574 {
575 HB_BUFFER_ALLOCATE_VAR (buffer, unicode_props);
576 }
577
578 static inline void
579 _hb_buffer_deallocate_unicode_vars (hb_buffer_t *buffer)
580 {
581 HB_BUFFER_DEALLOCATE_VAR (buffer, unicode_props);
582 }
583
584 static inline void
585 _hb_buffer_assert_unicode_vars (hb_buffer_t *buffer)
586 {
587 HB_BUFFER_ASSERT_VAR (buffer, unicode_props);
588 }
589
590 static inline void
591 _hb_buffer_allocate_gsubgpos_vars (hb_buffer_t *buffer)
592 {
593 HB_BUFFER_ALLOCATE_VAR (buffer, glyph_props);
594 HB_BUFFER_ALLOCATE_VAR (buffer, lig_props);
595 HB_BUFFER_ALLOCATE_VAR (buffer, syllable);
596 }
597
598 static inline void
599 _hb_buffer_deallocate_gsubgpos_vars (hb_buffer_t *buffer)
600 {
601 HB_BUFFER_DEALLOCATE_VAR (buffer, syllable);
602 HB_BUFFER_DEALLOCATE_VAR (buffer, lig_props);
603 HB_BUFFER_DEALLOCATE_VAR (buffer, glyph_props);
604 }
605
606 static inline void
607 _hb_buffer_assert_gsubgpos_vars (hb_buffer_t *buffer)
608 {
609 HB_BUFFER_ASSERT_VAR (buffer, glyph_props);
610 HB_BUFFER_ASSERT_VAR (buffer, lig_props);
611 HB_BUFFER_ASSERT_VAR (buffer, syllable);
612 }
613
614 /* Make sure no one directly touches our props... */
615 #undef unicode_props0
616 #undef unicode_props1
617 #undef lig_props
618 #undef glyph_props
619
620
621 #endif /* HB_OT_LAYOUT_PRIVATE_HH */