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 | |
100 | /* Should be called before all the substitute_lookup's are done. */ |
101 | HB_INTERNAL void |
102 | hb_ot_layout_substitute_start (hb_font_t *font, |
103 | hb_buffer_t *buffer); |
104 | |
105 | namespace OT { |
106 | struct hb_ot_apply_context_t; |
107 | struct hb_ot_layout_lookup_accelerator_t; |
108 | namespace Layout { |
109 | namespace GSUB_impl { |
110 | struct SubstLookup; |
111 | } |
112 | } |
113 | } |
114 | |
115 | HB_INTERNAL void |
116 | hb_ot_layout_substitute_lookup (OT::hb_ot_apply_context_t *c, |
117 | const OT::Layout::GSUB_impl::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. */ |
122 | HB_INTERNAL void |
123 | hb_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. */ |
127 | HB_INTERNAL void |
128 | hb_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. */ |
132 | HB_INTERNAL void |
133 | hb_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 | |
158 | static 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 | |
171 | |
172 | /* unicode_props */ |
173 | |
174 | /* Design: |
175 | * unicode_props() is a two-byte number. The low byte includes: |
176 | * - General_Category: 5 bits. |
177 | * - A bit each for: |
178 | * * Is it Default_Ignorable(); we have a modified Default_Ignorable(). |
179 | * * Whether it's one of the four Mongolian Free Variation Selectors, |
180 | * CGJ, or other characters that are hidden but should not be ignored |
181 | * like most other Default_Ignorable()s do during matching. |
182 | * * Whether it's a grapheme continuation. |
183 | * |
184 | * The high-byte has different meanings, switched by the Gen-Cat: |
185 | * - For Mn,Mc,Me: the modified Combining_Class. |
186 | * - For Cf: whether it's ZWJ, ZWNJ, or something else. |
187 | * - For Ws: index of which space character this is, if space fallback |
188 | * is needed, ie. we don't set this by default, only if asked to. |
189 | */ |
190 | |
191 | enum hb_unicode_props_flags_t { |
192 | UPROPS_MASK_GEN_CAT = 0x001Fu, |
193 | UPROPS_MASK_IGNORABLE = 0x0020u, |
194 | UPROPS_MASK_HIDDEN = 0x0040u, /* MONGOLIAN FREE VARIATION SELECTOR 1..4, or TAG characters */ |
195 | UPROPS_MASK_CONTINUATION=0x0080u, |
196 | |
197 | /* If GEN_CAT=FORMAT, top byte masks: */ |
198 | UPROPS_MASK_Cf_ZWJ = 0x0100u, |
199 | UPROPS_MASK_Cf_ZWNJ = 0x0200u |
200 | }; |
201 | HB_MARK_AS_FLAG_T (hb_unicode_props_flags_t); |
202 | |
203 | static inline void |
204 | _hb_glyph_info_set_unicode_props (hb_glyph_info_t *info, hb_buffer_t *buffer) |
205 | { |
206 | hb_unicode_funcs_t *unicode = buffer->unicode; |
207 | unsigned int u = info->codepoint; |
208 | unsigned int gen_cat = (unsigned int) unicode->general_category (u); |
209 | unsigned int props = gen_cat; |
210 | |
211 | if (u >= 0x80u) |
212 | { |
213 | buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_NON_ASCII; |
214 | |
215 | if (unlikely (unicode->is_default_ignorable (u))) |
216 | { |
217 | buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_DEFAULT_IGNORABLES; |
218 | props |= UPROPS_MASK_IGNORABLE; |
219 | if (u == 0x200Cu) props |= UPROPS_MASK_Cf_ZWNJ; |
220 | else if (u == 0x200Du) props |= UPROPS_MASK_Cf_ZWJ; |
221 | /* Mongolian Free Variation Selectors need to be remembered |
222 | * because although we need to hide them like default-ignorables, |
223 | * they need to non-ignorable during shaping. This is similar to |
224 | * what we do for joiners in Indic-like shapers, but since the |
225 | * FVSes are GC=Mn, we have use a separate bit to remember them. |
226 | * Fixes: |
227 | * https://github.com/harfbuzz/harfbuzz/issues/234 */ |
228 | else if (unlikely (hb_in_ranges<hb_codepoint_t> (u, 0x180Bu, 0x180Du, 0x180Fu, 0x180Fu))) props |= UPROPS_MASK_HIDDEN; |
229 | /* TAG characters need similar treatment. Fixes: |
230 | * https://github.com/harfbuzz/harfbuzz/issues/463 */ |
231 | else if (unlikely (hb_in_range<hb_codepoint_t> (u, 0xE0020u, 0xE007Fu))) props |= UPROPS_MASK_HIDDEN; |
232 | /* COMBINING GRAPHEME JOINER should not be skipped; at least some times. |
233 | * https://github.com/harfbuzz/harfbuzz/issues/554 */ |
234 | else if (unlikely (u == 0x034Fu)) |
235 | { |
236 | buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_CGJ; |
237 | props |= UPROPS_MASK_HIDDEN; |
238 | } |
239 | } |
240 | |
241 | if (unlikely (HB_UNICODE_GENERAL_CATEGORY_IS_MARK (gen_cat))) |
242 | { |
243 | props |= UPROPS_MASK_CONTINUATION; |
244 | props |= unicode->modified_combining_class (u)<<8; |
245 | } |
246 | } |
247 | |
248 | info->unicode_props() = props; |
249 | } |
250 | |
251 | static inline void |
252 | _hb_glyph_info_set_general_category (hb_glyph_info_t *info, |
253 | hb_unicode_general_category_t gen_cat) |
254 | { |
255 | /* Clears top-byte. */ |
256 | info->unicode_props() = (unsigned int) gen_cat | (info->unicode_props() & (0xFF & ~UPROPS_MASK_GEN_CAT)); |
257 | } |
258 | |
259 | static inline hb_unicode_general_category_t |
260 | _hb_glyph_info_get_general_category (const hb_glyph_info_t *info) |
261 | { |
262 | return (hb_unicode_general_category_t) (info->unicode_props() & UPROPS_MASK_GEN_CAT); |
263 | } |
264 | |
265 | static inline bool |
266 | _hb_glyph_info_is_unicode_mark (const hb_glyph_info_t *info) |
267 | { |
268 | return HB_UNICODE_GENERAL_CATEGORY_IS_MARK (info->unicode_props() & UPROPS_MASK_GEN_CAT); |
269 | } |
270 | static inline void |
271 | _hb_glyph_info_set_modified_combining_class (hb_glyph_info_t *info, |
272 | unsigned int modified_class) |
273 | { |
274 | if (unlikely (!_hb_glyph_info_is_unicode_mark (info))) |
275 | return; |
276 | info->unicode_props() = (modified_class<<8) | (info->unicode_props() & 0xFF); |
277 | } |
278 | static inline unsigned int |
279 | _hb_glyph_info_get_modified_combining_class (const hb_glyph_info_t *info) |
280 | { |
281 | return _hb_glyph_info_is_unicode_mark (info) ? info->unicode_props()>>8 : 0; |
282 | } |
283 | #define info_cc(info) (_hb_glyph_info_get_modified_combining_class (&(info))) |
284 | |
285 | static inline bool |
286 | _hb_glyph_info_is_unicode_space (const hb_glyph_info_t *info) |
287 | { |
288 | return _hb_glyph_info_get_general_category (info) == |
289 | HB_UNICODE_GENERAL_CATEGORY_SPACE_SEPARATOR; |
290 | } |
291 | static inline void |
292 | _hb_glyph_info_set_unicode_space_fallback_type (hb_glyph_info_t *info, hb_unicode_funcs_t::space_t s) |
293 | { |
294 | if (unlikely (!_hb_glyph_info_is_unicode_space (info))) |
295 | return; |
296 | info->unicode_props() = (((unsigned int) s)<<8) | (info->unicode_props() & 0xFF); |
297 | } |
298 | static inline hb_unicode_funcs_t::space_t |
299 | _hb_glyph_info_get_unicode_space_fallback_type (const hb_glyph_info_t *info) |
300 | { |
301 | return _hb_glyph_info_is_unicode_space (info) ? |
302 | (hb_unicode_funcs_t::space_t) (info->unicode_props()>>8) : |
303 | hb_unicode_funcs_t::NOT_SPACE; |
304 | } |
305 | |
306 | static inline bool _hb_glyph_info_substituted (const hb_glyph_info_t *info); |
307 | |
308 | static inline bool |
309 | _hb_glyph_info_is_default_ignorable (const hb_glyph_info_t *info) |
310 | { |
311 | return (info->unicode_props() & UPROPS_MASK_IGNORABLE) && |
312 | !_hb_glyph_info_substituted (info); |
313 | } |
314 | static inline bool |
315 | _hb_glyph_info_is_default_ignorable_and_not_hidden (const hb_glyph_info_t *info) |
316 | { |
317 | return ((info->unicode_props() & (UPROPS_MASK_IGNORABLE|UPROPS_MASK_HIDDEN)) |
318 | == UPROPS_MASK_IGNORABLE) && |
319 | !_hb_glyph_info_substituted (info); |
320 | } |
321 | static inline void |
322 | _hb_glyph_info_unhide (hb_glyph_info_t *info) |
323 | { |
324 | info->unicode_props() &= ~ UPROPS_MASK_HIDDEN; |
325 | } |
326 | |
327 | static inline void |
328 | _hb_glyph_info_set_continuation (hb_glyph_info_t *info) |
329 | { |
330 | info->unicode_props() |= UPROPS_MASK_CONTINUATION; |
331 | } |
332 | static inline void |
333 | _hb_glyph_info_reset_continuation (hb_glyph_info_t *info) |
334 | { |
335 | info->unicode_props() &= ~ UPROPS_MASK_CONTINUATION; |
336 | } |
337 | static inline bool |
338 | _hb_glyph_info_is_continuation (const hb_glyph_info_t *info) |
339 | { |
340 | return info->unicode_props() & UPROPS_MASK_CONTINUATION; |
341 | } |
342 | |
343 | static inline bool |
344 | _hb_grapheme_group_func (const hb_glyph_info_t& a HB_UNUSED, |
345 | const hb_glyph_info_t& b) |
346 | { return _hb_glyph_info_is_continuation (&b); } |
347 | |
348 | #define foreach_grapheme(buffer, start, end) \ |
349 | foreach_group (buffer, start, end, _hb_grapheme_group_func) |
350 | |
351 | static inline void |
352 | _hb_ot_layout_reverse_graphemes (hb_buffer_t *buffer) |
353 | { |
354 | buffer->reverse_groups (_hb_grapheme_group_func, |
355 | buffer->cluster_level == HB_BUFFER_CLUSTER_LEVEL_MONOTONE_CHARACTERS); |
356 | } |
357 | |
358 | static inline bool |
359 | _hb_glyph_info_is_unicode_format (const hb_glyph_info_t *info) |
360 | { |
361 | return _hb_glyph_info_get_general_category (info) == |
362 | HB_UNICODE_GENERAL_CATEGORY_FORMAT; |
363 | } |
364 | static inline bool |
365 | _hb_glyph_info_is_zwnj (const hb_glyph_info_t *info) |
366 | { |
367 | return _hb_glyph_info_is_unicode_format (info) && (info->unicode_props() & UPROPS_MASK_Cf_ZWNJ); |
368 | } |
369 | static inline bool |
370 | _hb_glyph_info_is_zwj (const hb_glyph_info_t *info) |
371 | { |
372 | return _hb_glyph_info_is_unicode_format (info) && (info->unicode_props() & UPROPS_MASK_Cf_ZWJ); |
373 | } |
374 | static inline bool |
375 | _hb_glyph_info_is_joiner (const hb_glyph_info_t *info) |
376 | { |
377 | return _hb_glyph_info_is_unicode_format (info) && (info->unicode_props() & (UPROPS_MASK_Cf_ZWNJ|UPROPS_MASK_Cf_ZWJ)); |
378 | } |
379 | static inline void |
380 | _hb_glyph_info_flip_joiners (hb_glyph_info_t *info) |
381 | { |
382 | if (!_hb_glyph_info_is_unicode_format (info)) |
383 | return; |
384 | info->unicode_props() ^= UPROPS_MASK_Cf_ZWNJ | UPROPS_MASK_Cf_ZWJ; |
385 | } |
386 | |
387 | /* lig_props: aka lig_id / lig_comp |
388 | * |
389 | * When a ligature is formed: |
390 | * |
391 | * - The ligature glyph and any marks in between all the same newly allocated |
392 | * lig_id, |
393 | * - The ligature glyph will get lig_num_comps set to the number of components |
394 | * - The marks get lig_comp > 0, reflecting which component of the ligature |
395 | * they were applied to. |
396 | * - This is used in GPOS to attach marks to the right component of a ligature |
397 | * in MarkLigPos, |
398 | * - Note that when marks are ligated together, much of the above is skipped |
399 | * and the current lig_id reused. |
400 | * |
401 | * When a multiple-substitution is done: |
402 | * |
403 | * - All resulting glyphs will have lig_id = 0, |
404 | * - The resulting glyphs will have lig_comp = 0, 1, 2, ... respectively. |
405 | * - This is used in GPOS to attach marks to the first component of a |
406 | * multiple substitution in MarkBasePos. |
407 | * |
408 | * The numbers are also used in GPOS to do mark-to-mark positioning only |
409 | * to marks that belong to the same component of the same ligature. |
410 | */ |
411 | |
412 | static inline void |
413 | _hb_glyph_info_clear_lig_props (hb_glyph_info_t *info) |
414 | { |
415 | info->lig_props() = 0; |
416 | } |
417 | |
418 | #define IS_LIG_BASE 0x10 |
419 | |
420 | static inline void |
421 | _hb_glyph_info_set_lig_props_for_ligature (hb_glyph_info_t *info, |
422 | unsigned int lig_id, |
423 | unsigned int lig_num_comps) |
424 | { |
425 | info->lig_props() = (lig_id << 5) | IS_LIG_BASE | (lig_num_comps & 0x0F); |
426 | } |
427 | |
428 | static inline void |
429 | _hb_glyph_info_set_lig_props_for_mark (hb_glyph_info_t *info, |
430 | unsigned int lig_id, |
431 | unsigned int lig_comp) |
432 | { |
433 | info->lig_props() = (lig_id << 5) | (lig_comp & 0x0F); |
434 | } |
435 | |
436 | static inline void |
437 | _hb_glyph_info_set_lig_props_for_component (hb_glyph_info_t *info, unsigned int comp) |
438 | { |
439 | _hb_glyph_info_set_lig_props_for_mark (info, 0, comp); |
440 | } |
441 | |
442 | static inline unsigned int |
443 | _hb_glyph_info_get_lig_id (const hb_glyph_info_t *info) |
444 | { |
445 | return info->lig_props() >> 5; |
446 | } |
447 | |
448 | static inline bool |
449 | _hb_glyph_info_ligated_internal (const hb_glyph_info_t *info) |
450 | { |
451 | return info->lig_props() & IS_LIG_BASE; |
452 | } |
453 | |
454 | static inline unsigned int |
455 | _hb_glyph_info_get_lig_comp (const hb_glyph_info_t *info) |
456 | { |
457 | if (_hb_glyph_info_ligated_internal (info)) |
458 | return 0; |
459 | else |
460 | return info->lig_props() & 0x0F; |
461 | } |
462 | |
463 | static inline unsigned int |
464 | _hb_glyph_info_get_lig_num_comps (const hb_glyph_info_t *info) |
465 | { |
466 | if ((info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE) && |
467 | _hb_glyph_info_ligated_internal (info)) |
468 | return info->lig_props() & 0x0F; |
469 | else |
470 | return 1; |
471 | } |
472 | |
473 | static inline uint8_t |
474 | _hb_allocate_lig_id (hb_buffer_t *buffer) |
475 | { |
476 | uint8_t lig_id = buffer->next_serial () & 0x07; |
477 | if (unlikely (!lig_id)) |
478 | lig_id = _hb_allocate_lig_id (buffer); /* in case of overflow */ |
479 | return lig_id; |
480 | } |
481 | |
482 | /* glyph_props: */ |
483 | |
484 | static inline void |
485 | _hb_glyph_info_set_glyph_props (hb_glyph_info_t *info, unsigned int props) |
486 | { |
487 | info->glyph_props() = props; |
488 | } |
489 | |
490 | static inline unsigned int |
491 | _hb_glyph_info_get_glyph_props (const hb_glyph_info_t *info) |
492 | { |
493 | return info->glyph_props(); |
494 | } |
495 | |
496 | static inline bool |
497 | _hb_glyph_info_is_base_glyph (const hb_glyph_info_t *info) |
498 | { |
499 | return info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH; |
500 | } |
501 | |
502 | static inline bool |
503 | _hb_glyph_info_is_ligature (const hb_glyph_info_t *info) |
504 | { |
505 | return info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE; |
506 | } |
507 | |
508 | static inline bool |
509 | _hb_glyph_info_is_mark (const hb_glyph_info_t *info) |
510 | { |
511 | return info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_MARK; |
512 | } |
513 | |
514 | static inline bool |
515 | _hb_glyph_info_substituted (const hb_glyph_info_t *info) |
516 | { |
517 | return info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED; |
518 | } |
519 | |
520 | static inline bool |
521 | _hb_glyph_info_ligated (const hb_glyph_info_t *info) |
522 | { |
523 | return info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATED; |
524 | } |
525 | |
526 | static inline bool |
527 | _hb_glyph_info_multiplied (const hb_glyph_info_t *info) |
528 | { |
529 | return info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED; |
530 | } |
531 | |
532 | static inline bool |
533 | _hb_glyph_info_ligated_and_didnt_multiply (const hb_glyph_info_t *info) |
534 | { |
535 | return _hb_glyph_info_ligated (info) && !_hb_glyph_info_multiplied (info); |
536 | } |
537 | |
538 | static inline void |
539 | _hb_glyph_info_clear_ligated_and_multiplied (hb_glyph_info_t *info) |
540 | { |
541 | info->glyph_props() &= ~(HB_OT_LAYOUT_GLYPH_PROPS_LIGATED | |
542 | HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED); |
543 | } |
544 | |
545 | static inline void |
546 | _hb_glyph_info_clear_substituted (hb_glyph_info_t *info) |
547 | { |
548 | info->glyph_props() &= ~(HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED); |
549 | } |
550 | |
551 | static inline bool |
552 | _hb_clear_substitution_flags (const hb_ot_shape_plan_t *plan HB_UNUSED, |
553 | hb_font_t *font HB_UNUSED, |
554 | hb_buffer_t *buffer) |
555 | { |
556 | hb_glyph_info_t *info = buffer->info; |
557 | unsigned int count = buffer->len; |
558 | for (unsigned int i = 0; i < count; i++) |
559 | _hb_glyph_info_clear_substituted (&info[i]); |
560 | return false; |
561 | } |
562 | |
563 | |
564 | /* Allocation / deallocation. */ |
565 | |
566 | static inline void |
567 | _hb_buffer_allocate_unicode_vars (hb_buffer_t *buffer) |
568 | { |
569 | HB_BUFFER_ALLOCATE_VAR (buffer, unicode_props); |
570 | } |
571 | |
572 | static inline void |
573 | _hb_buffer_deallocate_unicode_vars (hb_buffer_t *buffer) |
574 | { |
575 | HB_BUFFER_DEALLOCATE_VAR (buffer, unicode_props); |
576 | } |
577 | |
578 | static inline void |
579 | _hb_buffer_assert_unicode_vars (hb_buffer_t *buffer) |
580 | { |
581 | HB_BUFFER_ASSERT_VAR (buffer, unicode_props); |
582 | } |
583 | |
584 | static inline void |
585 | _hb_buffer_allocate_gsubgpos_vars (hb_buffer_t *buffer) |
586 | { |
587 | HB_BUFFER_ALLOCATE_VAR (buffer, glyph_props); |
588 | HB_BUFFER_ALLOCATE_VAR (buffer, lig_props); |
589 | } |
590 | |
591 | static inline void |
592 | _hb_buffer_deallocate_gsubgpos_vars (hb_buffer_t *buffer) |
593 | { |
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 | } |
604 | |
605 | /* Make sure no one directly touches our props... */ |
606 | #undef unicode_props0 |
607 | #undef unicode_props1 |
608 | #undef lig_props |
609 | #undef glyph_props |
610 | |
611 | #endif /* HB_OT_LAYOUT_HH */ |
612 | |