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-digest-private.hh" |
37 | #include "hb-open-type-private.hh" |
38 | |
39 | |
40 | /* Private API corresponding to hb-ot-layout.h: */ |
41 | |
42 | HB_INTERNAL hb_bool_t |
43 | hb_ot_layout_table_find_feature (hb_face_t *face, |
44 | hb_tag_t table_tag, |
45 | hb_tag_t feature_tag, |
46 | unsigned int *feature_index); |
47 | |
48 | |
49 | /* |
50 | * GDEF |
51 | */ |
52 | |
53 | enum hb_ot_layout_glyph_props_flags_t |
54 | { |
55 | /* The following three match LookupFlags::Ignore* numbers. */ |
56 | HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH = 0x02u, |
57 | HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE = 0x04u, |
58 | HB_OT_LAYOUT_GLYPH_PROPS_MARK = 0x08u, |
59 | |
60 | /* The following are used internally; not derived from GDEF. */ |
61 | HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED = 0x10u, |
62 | HB_OT_LAYOUT_GLYPH_PROPS_LIGATED = 0x20u, |
63 | HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED = 0x40u, |
64 | |
65 | HB_OT_LAYOUT_GLYPH_PROPS_PRESERVE = HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED | |
66 | HB_OT_LAYOUT_GLYPH_PROPS_LIGATED | |
67 | HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED |
68 | }; |
69 | HB_MARK_AS_FLAG_T (hb_ot_layout_glyph_props_flags_t); |
70 | |
71 | |
72 | /* |
73 | * GSUB/GPOS |
74 | */ |
75 | |
76 | HB_INTERNAL hb_bool_t |
77 | hb_ot_layout_lookup_would_substitute_fast (hb_face_t *face, |
78 | unsigned int lookup_index, |
79 | const hb_codepoint_t *glyphs, |
80 | unsigned int glyphs_length, |
81 | hb_bool_t zero_context); |
82 | |
83 | |
84 | /* Should be called before all the substitute_lookup's are done. */ |
85 | HB_INTERNAL void |
86 | hb_ot_layout_substitute_start (hb_font_t *font, |
87 | hb_buffer_t *buffer); |
88 | |
89 | |
90 | struct hb_ot_layout_lookup_accelerator_t; |
91 | |
92 | namespace OT { |
93 | struct hb_apply_context_t; |
94 | struct SubstLookup; |
95 | } |
96 | |
97 | HB_INTERNAL void |
98 | hb_ot_layout_substitute_lookup (OT::hb_apply_context_t *c, |
99 | const OT::SubstLookup &lookup, |
100 | const hb_ot_layout_lookup_accelerator_t &accel); |
101 | |
102 | |
103 | /* Should be called before all the position_lookup's are done. */ |
104 | HB_INTERNAL void |
105 | hb_ot_layout_position_start (hb_font_t *font, |
106 | hb_buffer_t *buffer); |
107 | |
108 | /* Should be called after all the position_lookup's are done, to finish advances. */ |
109 | HB_INTERNAL void |
110 | hb_ot_layout_position_finish_advances (hb_font_t *font, |
111 | hb_buffer_t *buffer); |
112 | |
113 | /* Should be called after hb_ot_layout_position_finish_advances, to finish offsets. */ |
114 | HB_INTERNAL void |
115 | hb_ot_layout_position_finish_offsets (hb_font_t *font, |
116 | hb_buffer_t *buffer); |
117 | |
118 | |
119 | |
120 | /* |
121 | * hb_ot_layout_t |
122 | */ |
123 | |
124 | namespace OT { |
125 | struct GDEF; |
126 | struct GSUB; |
127 | struct GPOS; |
128 | struct MATH; |
129 | struct fvar; |
130 | struct avar; |
131 | } |
132 | |
133 | struct hb_ot_layout_lookup_accelerator_t |
134 | { |
135 | template <typename TLookup> |
136 | inline void init (const TLookup &lookup) |
137 | { |
138 | digest.init (); |
139 | lookup.add_coverage (&digest); |
140 | } |
141 | |
142 | inline void fini (void) |
143 | { |
144 | } |
145 | |
146 | inline bool may_have (hb_codepoint_t g) const { |
147 | return digest.may_have (g); |
148 | } |
149 | |
150 | private: |
151 | hb_set_digest_t digest; |
152 | }; |
153 | |
154 | struct hb_ot_layout_t |
155 | { |
156 | hb_blob_t *gdef_blob; |
157 | hb_blob_t *gsub_blob; |
158 | hb_blob_t *gpos_blob; |
159 | |
160 | const struct OT::GDEF *gdef; |
161 | const struct OT::GSUB *gsub; |
162 | const struct OT::GPOS *gpos; |
163 | |
164 | /* TODO Move the following out of this struct. */ |
165 | OT::hb_lazy_table_loader_t<struct OT::MATH> math; |
166 | OT::hb_lazy_table_loader_t<struct OT::fvar> fvar; |
167 | OT::hb_lazy_table_loader_t<struct OT::avar> avar; |
168 | |
169 | unsigned int gsub_lookup_count; |
170 | unsigned int gpos_lookup_count; |
171 | |
172 | hb_ot_layout_lookup_accelerator_t *gsub_accels; |
173 | hb_ot_layout_lookup_accelerator_t *gpos_accels; |
174 | }; |
175 | |
176 | |
177 | HB_INTERNAL hb_ot_layout_t * |
178 | _hb_ot_layout_create (hb_face_t *face); |
179 | |
180 | HB_INTERNAL void |
181 | _hb_ot_layout_destroy (hb_ot_layout_t *layout); |
182 | |
183 | |
184 | #define hb_ot_layout_from_face(face) ((hb_ot_layout_t *) face->shaper_data.ot) |
185 | |
186 | |
187 | /* |
188 | * Buffer var routines. |
189 | */ |
190 | |
191 | /* buffer var allocations, used during the entire shaping process */ |
192 | #define unicode_props() var2.u16[0] |
193 | |
194 | /* buffer var allocations, used during the GSUB/GPOS processing */ |
195 | #define glyph_props() var1.u16[0] /* GDEF glyph properties */ |
196 | #define lig_props() var1.u8[2] /* GSUB/GPOS ligature tracking */ |
197 | #define syllable() var1.u8[3] /* GSUB/GPOS shaping boundaries */ |
198 | |
199 | |
200 | /* Loop over syllables. Based on foreach_cluster(). */ |
201 | #define foreach_syllable(buffer, start, end) \ |
202 | for (unsigned int \ |
203 | _count = buffer->len, \ |
204 | start = 0, end = _count ? _next_syllable (buffer, 0) : 0; \ |
205 | start < _count; \ |
206 | start = end, end = _next_syllable (buffer, start)) |
207 | |
208 | static inline unsigned int |
209 | _next_syllable (hb_buffer_t *buffer, unsigned int start) |
210 | { |
211 | hb_glyph_info_t *info = buffer->info; |
212 | unsigned int count = buffer->len; |
213 | |
214 | unsigned int syllable = info[start].syllable(); |
215 | while (++start < count && syllable == info[start].syllable()) |
216 | ; |
217 | |
218 | return start; |
219 | } |
220 | |
221 | |
222 | /* unicode_props */ |
223 | |
224 | /* Design: |
225 | * unicode_props() is a two-byte number. The low byte includes: |
226 | * - General_Category: 5 bits. |
227 | * - A bit each for: |
228 | * * Is it Default_Ignorable(); we have a modified Default_Ignorable(). |
229 | * * Whether it's one of the three Mongolian Free Variation Selectors, |
230 | * CGJ, or other characters that are hidden but should not be ignored |
231 | * like most other Default_Ignorable()s do during matching. |
232 | * * One free bit right now. |
233 | * |
234 | * The high-byte has different meanings, switched by the Gen-Cat: |
235 | * - For Mn,Mc,Me: the modified Combining_Class. |
236 | * - For Cf: whether it's ZWJ, ZWNJ, or something else. |
237 | * - For Ws: index of which space character this is, if space fallback |
238 | * is needed, ie. we don't set this by default, only if asked to. |
239 | */ |
240 | |
241 | enum hb_unicode_props_flags_t { |
242 | UPROPS_MASK_GEN_CAT = 0x001Fu, |
243 | UPROPS_MASK_IGNORABLE = 0x0020u, |
244 | UPROPS_MASK_HIDDEN = 0x0040u, /* MONGOLIAN FREE VARIATION SELECTOR 1..3, |
245 | * or TAG characters */ |
246 | |
247 | /* If GEN_CAT=FORMAT, top byte masks: */ |
248 | UPROPS_MASK_Cf_ZWJ = 0x0100u, |
249 | UPROPS_MASK_Cf_ZWNJ = 0x0200u |
250 | }; |
251 | HB_MARK_AS_FLAG_T (hb_unicode_props_flags_t); |
252 | |
253 | static inline void |
254 | _hb_glyph_info_set_unicode_props (hb_glyph_info_t *info, hb_buffer_t *buffer) |
255 | { |
256 | hb_unicode_funcs_t *unicode = buffer->unicode; |
257 | unsigned int u = info->codepoint; |
258 | unsigned int gen_cat = (unsigned int) unicode->general_category (unicode: u); |
259 | unsigned int props = gen_cat; |
260 | |
261 | if (u >= 0x80) |
262 | { |
263 | buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_NON_ASCII; |
264 | if (unlikely (unicode->is_default_ignorable (u))) |
265 | { |
266 | buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_DEFAULT_IGNORABLES; |
267 | props |= UPROPS_MASK_IGNORABLE; |
268 | if (u == 0x200Cu) props |= UPROPS_MASK_Cf_ZWNJ; |
269 | else if (u == 0x200Du) props |= UPROPS_MASK_Cf_ZWJ; |
270 | /* Mongolian Free Variation Selectors need to be remembered |
271 | * because although we need to hide them like default-ignorables, |
272 | * they need to non-ignorable during shaping. This is similar to |
273 | * what we do for joiners in Indic-like shapers, but since the |
274 | * FVSes are GC=Mn, we have use a separate bit to remember them. |
275 | * Fixes: |
276 | * https://github.com/harfbuzz/harfbuzz/issues/234 */ |
277 | else if (unlikely (hb_in_range (u, 0x180Bu, 0x180Du))) props |= UPROPS_MASK_HIDDEN; |
278 | /* TAG characters need similar treatment. Fixes: |
279 | * https://github.com/harfbuzz/harfbuzz/issues/463 */ |
280 | else if (unlikely (hb_in_range (u, 0xE0020u, 0xE007Fu))) props |= UPROPS_MASK_HIDDEN; |
281 | /* COMBINING GRAPHEME JOINER should not be skipped; at least some times. |
282 | * https://github.com/harfbuzz/harfbuzz/issues/554 */ |
283 | else if (unlikely (u == 0x034Fu)) props |= UPROPS_MASK_HIDDEN; |
284 | } |
285 | else if (unlikely (HB_UNICODE_GENERAL_CATEGORY_IS_NON_ENCLOSING_MARK_OR_MODIFIER_SYMBOL (gen_cat))) |
286 | { |
287 | /* The above check is just an optimization to let in only things we need further |
288 | * processing on. */ |
289 | |
290 | /* Only Mn and Mc can have non-zero ccc: |
291 | * http://www.unicode.org/policies/stability_policy.html#Property_Value |
292 | * """ |
293 | * Canonical_Combining_Class, General_Category |
294 | * All characters other than those with General_Category property values |
295 | * Spacing_Mark (Mc) and Nonspacing_Mark (Mn) have the Canonical_Combining_Class |
296 | * property value 0. |
297 | * 1.1.5+ |
298 | * """ |
299 | * |
300 | * Also, all Mn's that are Default_Ignorable, have ccc=0, hence |
301 | * the "else if". |
302 | */ |
303 | props |= unicode->modified_combining_class (unicode: info->codepoint)<<8; |
304 | |
305 | /* Recategorize emoji skin-tone modifiers as Unicode mark, so they |
306 | * behave correctly in non-native directionality. They originally |
307 | * are MODIFIER_SYMBOL. Fixes: |
308 | * https://github.com/harfbuzz/harfbuzz/issues/169 |
309 | */ |
310 | if (unlikely (hb_in_range (u, 0x1F3FBu, 0x1F3FFu))) |
311 | { |
312 | props = gen_cat = HB_UNICODE_GENERAL_CATEGORY_ENCLOSING_MARK; |
313 | } |
314 | } |
315 | } |
316 | |
317 | info->unicode_props() = props; |
318 | } |
319 | |
320 | static inline void |
321 | _hb_glyph_info_set_general_category (hb_glyph_info_t *info, |
322 | hb_unicode_general_category_t gen_cat) |
323 | { |
324 | /* Clears top-byte. */ |
325 | info->unicode_props() = (unsigned int) gen_cat | (info->unicode_props() & (0xFF & ~UPROPS_MASK_GEN_CAT)); |
326 | } |
327 | |
328 | static inline hb_unicode_general_category_t |
329 | _hb_glyph_info_get_general_category (const hb_glyph_info_t *info) |
330 | { |
331 | return (hb_unicode_general_category_t) (info->unicode_props() & UPROPS_MASK_GEN_CAT); |
332 | } |
333 | |
334 | static inline bool |
335 | _hb_glyph_info_is_unicode_mark (const hb_glyph_info_t *info) |
336 | { |
337 | return HB_UNICODE_GENERAL_CATEGORY_IS_MARK (info->unicode_props() & UPROPS_MASK_GEN_CAT); |
338 | } |
339 | static inline void |
340 | _hb_glyph_info_set_modified_combining_class (hb_glyph_info_t *info, |
341 | unsigned int modified_class) |
342 | { |
343 | if (unlikely (!_hb_glyph_info_is_unicode_mark (info))) |
344 | return; |
345 | info->unicode_props() = (modified_class<<8) | (info->unicode_props() & 0xFF); |
346 | } |
347 | static inline unsigned int |
348 | _hb_glyph_info_get_modified_combining_class (const hb_glyph_info_t *info) |
349 | { |
350 | return _hb_glyph_info_is_unicode_mark (info) ? info->unicode_props()>>8 : 0; |
351 | } |
352 | |
353 | #define info_cc(info) (_hb_glyph_info_get_modified_combining_class (&(info))) |
354 | |
355 | static inline bool |
356 | _hb_glyph_info_is_unicode_space (const hb_glyph_info_t *info) |
357 | { |
358 | return _hb_glyph_info_get_general_category (info) == |
359 | HB_UNICODE_GENERAL_CATEGORY_SPACE_SEPARATOR; |
360 | } |
361 | static inline void |
362 | _hb_glyph_info_set_unicode_space_fallback_type (hb_glyph_info_t *info, hb_unicode_funcs_t::space_t s) |
363 | { |
364 | if (unlikely (!_hb_glyph_info_is_unicode_space (info))) |
365 | return; |
366 | info->unicode_props() = (((unsigned int) s)<<8) | (info->unicode_props() & 0xFF); |
367 | } |
368 | static inline hb_unicode_funcs_t::space_t |
369 | _hb_glyph_info_get_unicode_space_fallback_type (const hb_glyph_info_t *info) |
370 | { |
371 | return _hb_glyph_info_is_unicode_space (info) ? |
372 | (hb_unicode_funcs_t::space_t) (info->unicode_props()>>8) : |
373 | hb_unicode_funcs_t::NOT_SPACE; |
374 | } |
375 | |
376 | static inline bool _hb_glyph_info_ligated (const hb_glyph_info_t *info); |
377 | |
378 | static inline hb_bool_t |
379 | _hb_glyph_info_is_default_ignorable (const hb_glyph_info_t *info) |
380 | { |
381 | return (info->unicode_props() & UPROPS_MASK_IGNORABLE) && |
382 | !_hb_glyph_info_ligated (info); |
383 | } |
384 | static inline hb_bool_t |
385 | _hb_glyph_info_is_default_ignorable_and_not_hidden (const hb_glyph_info_t *info) |
386 | { |
387 | return ((info->unicode_props() & (UPROPS_MASK_IGNORABLE|UPROPS_MASK_HIDDEN)) |
388 | == UPROPS_MASK_IGNORABLE) && |
389 | !_hb_glyph_info_ligated (info); |
390 | } |
391 | |
392 | static inline bool |
393 | _hb_glyph_info_is_unicode_format (const hb_glyph_info_t *info) |
394 | { |
395 | return _hb_glyph_info_get_general_category (info) == |
396 | HB_UNICODE_GENERAL_CATEGORY_FORMAT; |
397 | } |
398 | static inline hb_bool_t |
399 | _hb_glyph_info_is_zwnj (const hb_glyph_info_t *info) |
400 | { |
401 | return _hb_glyph_info_is_unicode_format (info) && (info->unicode_props() & UPROPS_MASK_Cf_ZWNJ); |
402 | } |
403 | static inline hb_bool_t |
404 | _hb_glyph_info_is_zwj (const hb_glyph_info_t *info) |
405 | { |
406 | return _hb_glyph_info_is_unicode_format (info) && (info->unicode_props() & UPROPS_MASK_Cf_ZWJ); |
407 | } |
408 | static inline hb_bool_t |
409 | _hb_glyph_info_is_joiner (const hb_glyph_info_t *info) |
410 | { |
411 | return _hb_glyph_info_is_unicode_format (info) && (info->unicode_props() & (UPROPS_MASK_Cf_ZWNJ|UPROPS_MASK_Cf_ZWJ)); |
412 | } |
413 | static inline void |
414 | _hb_glyph_info_flip_joiners (hb_glyph_info_t *info) |
415 | { |
416 | if (!_hb_glyph_info_is_unicode_format (info)) |
417 | return; |
418 | info->unicode_props() ^= UPROPS_MASK_Cf_ZWNJ | UPROPS_MASK_Cf_ZWJ; |
419 | } |
420 | |
421 | /* lig_props: aka lig_id / lig_comp |
422 | * |
423 | * When a ligature is formed: |
424 | * |
425 | * - The ligature glyph and any marks in between all the same newly allocated |
426 | * lig_id, |
427 | * - The ligature glyph will get lig_num_comps set to the number of components |
428 | * - The marks get lig_comp > 0, reflecting which component of the ligature |
429 | * they were applied to. |
430 | * - This is used in GPOS to attach marks to the right component of a ligature |
431 | * in MarkLigPos, |
432 | * - Note that when marks are ligated together, much of the above is skipped |
433 | * and the current lig_id reused. |
434 | * |
435 | * When a multiple-substitution is done: |
436 | * |
437 | * - All resulting glyphs will have lig_id = 0, |
438 | * - The resulting glyphs will have lig_comp = 0, 1, 2, ... respectively. |
439 | * - This is used in GPOS to attach marks to the first component of a |
440 | * multiple substitution in MarkBasePos. |
441 | * |
442 | * The numbers are also used in GPOS to do mark-to-mark positioning only |
443 | * to marks that belong to the same component of the same ligature. |
444 | */ |
445 | |
446 | static inline void |
447 | _hb_glyph_info_clear_lig_props (hb_glyph_info_t *info) |
448 | { |
449 | info->lig_props() = 0; |
450 | } |
451 | |
452 | #define IS_LIG_BASE 0x10 |
453 | |
454 | static inline void |
455 | _hb_glyph_info_set_lig_props_for_ligature (hb_glyph_info_t *info, |
456 | unsigned int lig_id, |
457 | unsigned int lig_num_comps) |
458 | { |
459 | info->lig_props() = (lig_id << 5) | IS_LIG_BASE | (lig_num_comps & 0x0F); |
460 | } |
461 | |
462 | static inline void |
463 | _hb_glyph_info_set_lig_props_for_mark (hb_glyph_info_t *info, |
464 | unsigned int lig_id, |
465 | unsigned int lig_comp) |
466 | { |
467 | info->lig_props() = (lig_id << 5) | (lig_comp & 0x0F); |
468 | } |
469 | |
470 | static inline void |
471 | _hb_glyph_info_set_lig_props_for_component (hb_glyph_info_t *info, unsigned int comp) |
472 | { |
473 | _hb_glyph_info_set_lig_props_for_mark (info, lig_id: 0, lig_comp: comp); |
474 | } |
475 | |
476 | static inline unsigned int |
477 | _hb_glyph_info_get_lig_id (const hb_glyph_info_t *info) |
478 | { |
479 | return info->lig_props() >> 5; |
480 | } |
481 | |
482 | static inline bool |
483 | _hb_glyph_info_ligated_internal (const hb_glyph_info_t *info) |
484 | { |
485 | return !!(info->lig_props() & IS_LIG_BASE); |
486 | } |
487 | |
488 | static inline unsigned int |
489 | _hb_glyph_info_get_lig_comp (const hb_glyph_info_t *info) |
490 | { |
491 | if (_hb_glyph_info_ligated_internal (info)) |
492 | return 0; |
493 | else |
494 | return info->lig_props() & 0x0F; |
495 | } |
496 | |
497 | static inline unsigned int |
498 | _hb_glyph_info_get_lig_num_comps (const hb_glyph_info_t *info) |
499 | { |
500 | if ((info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE) && |
501 | _hb_glyph_info_ligated_internal (info)) |
502 | return info->lig_props() & 0x0F; |
503 | else |
504 | return 1; |
505 | } |
506 | |
507 | static inline uint8_t |
508 | _hb_allocate_lig_id (hb_buffer_t *buffer) { |
509 | uint8_t lig_id = buffer->next_serial () & 0x07; |
510 | if (unlikely (!lig_id)) |
511 | lig_id = _hb_allocate_lig_id (buffer); /* in case of overflow */ |
512 | return lig_id; |
513 | } |
514 | |
515 | /* glyph_props: */ |
516 | |
517 | static inline void |
518 | _hb_glyph_info_set_glyph_props (hb_glyph_info_t *info, unsigned int props) |
519 | { |
520 | info->glyph_props() = props; |
521 | } |
522 | |
523 | static inline unsigned int |
524 | _hb_glyph_info_get_glyph_props (const hb_glyph_info_t *info) |
525 | { |
526 | return info->glyph_props(); |
527 | } |
528 | |
529 | static inline bool |
530 | _hb_glyph_info_is_base_glyph (const hb_glyph_info_t *info) |
531 | { |
532 | return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH); |
533 | } |
534 | |
535 | static inline bool |
536 | _hb_glyph_info_is_ligature (const hb_glyph_info_t *info) |
537 | { |
538 | return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE); |
539 | } |
540 | |
541 | static inline bool |
542 | _hb_glyph_info_is_mark (const hb_glyph_info_t *info) |
543 | { |
544 | return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_MARK); |
545 | } |
546 | |
547 | static inline bool |
548 | _hb_glyph_info_substituted (const hb_glyph_info_t *info) |
549 | { |
550 | return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED); |
551 | } |
552 | |
553 | static inline bool |
554 | _hb_glyph_info_ligated (const hb_glyph_info_t *info) |
555 | { |
556 | return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATED); |
557 | } |
558 | |
559 | static inline bool |
560 | _hb_glyph_info_multiplied (const hb_glyph_info_t *info) |
561 | { |
562 | return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED); |
563 | } |
564 | |
565 | static inline bool |
566 | _hb_glyph_info_ligated_and_didnt_multiply (const hb_glyph_info_t *info) |
567 | { |
568 | return _hb_glyph_info_ligated (info) && !_hb_glyph_info_multiplied (info); |
569 | } |
570 | |
571 | static inline void |
572 | _hb_glyph_info_clear_ligated_and_multiplied (hb_glyph_info_t *info) |
573 | { |
574 | info->glyph_props() &= ~(HB_OT_LAYOUT_GLYPH_PROPS_LIGATED | |
575 | HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED); |
576 | } |
577 | |
578 | static inline void |
579 | _hb_glyph_info_clear_substituted (hb_glyph_info_t *info) |
580 | { |
581 | info->glyph_props() &= ~(HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED); |
582 | } |
583 | |
584 | |
585 | /* Allocation / deallocation. */ |
586 | |
587 | static inline void |
588 | _hb_buffer_allocate_unicode_vars (hb_buffer_t *buffer) |
589 | { |
590 | HB_BUFFER_ALLOCATE_VAR (buffer, unicode_props); |
591 | } |
592 | |
593 | static inline void |
594 | _hb_buffer_deallocate_unicode_vars (hb_buffer_t *buffer) |
595 | { |
596 | HB_BUFFER_DEALLOCATE_VAR (buffer, unicode_props); |
597 | } |
598 | |
599 | static inline void |
600 | _hb_buffer_assert_unicode_vars (hb_buffer_t *buffer) |
601 | { |
602 | HB_BUFFER_ASSERT_VAR (buffer, unicode_props); |
603 | } |
604 | |
605 | static inline void |
606 | _hb_buffer_allocate_gsubgpos_vars (hb_buffer_t *buffer) |
607 | { |
608 | HB_BUFFER_ALLOCATE_VAR (buffer, glyph_props); |
609 | HB_BUFFER_ALLOCATE_VAR (buffer, lig_props); |
610 | HB_BUFFER_ALLOCATE_VAR (buffer, syllable); |
611 | } |
612 | |
613 | static inline void |
614 | _hb_buffer_deallocate_gsubgpos_vars (hb_buffer_t *buffer) |
615 | { |
616 | HB_BUFFER_DEALLOCATE_VAR (buffer, syllable); |
617 | HB_BUFFER_DEALLOCATE_VAR (buffer, lig_props); |
618 | HB_BUFFER_DEALLOCATE_VAR (buffer, glyph_props); |
619 | } |
620 | |
621 | static inline void |
622 | _hb_buffer_assert_gsubgpos_vars (hb_buffer_t *buffer) |
623 | { |
624 | HB_BUFFER_ASSERT_VAR (buffer, glyph_props); |
625 | HB_BUFFER_ASSERT_VAR (buffer, lig_props); |
626 | HB_BUFFER_ASSERT_VAR (buffer, syllable); |
627 | } |
628 | |
629 | /* Make sure no one directly touches our props... */ |
630 | #undef unicode_props0 |
631 | #undef unicode_props1 |
632 | #undef lig_props |
633 | #undef glyph_props |
634 | |
635 | #endif /* HB_OT_LAYOUT_PRIVATE_HH */ |
636 | |