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 HB_INTERNAL void
106 hb_ot_layout_delete_glyphs_inplace (hb_buffer_t *buffer,
107 bool (*filter) (const hb_glyph_info_t *info));
108
109 namespace OT {
110 struct hb_ot_apply_context_t;
111 struct SubstLookup;
112 struct hb_ot_layout_lookup_accelerator_t;
113 }
114
115 HB_INTERNAL void
116 hb_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. */
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
_hb_next_syllable(hb_buffer_t * buffer,unsigned int start)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 static inline void
_hb_clear_syllables(const hb_ot_shape_plan_t * plan HB_UNUSED,hb_font_t * font HB_UNUSED,hb_buffer_t * buffer)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 four 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
202 enum 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..4, 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 };
212 HB_MARK_AS_FLAG_T (hb_unicode_props_flags_t);
213
214 static inline void
_hb_glyph_info_set_unicode_props(hb_glyph_info_t * info,hb_buffer_t * buffer)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_ranges<hb_codepoint_t> (u, 0x180Bu, 0x180Du, 0x180Fu, 0x180Fu))) 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
262 static inline void
_hb_glyph_info_set_general_category(hb_glyph_info_t * info,hb_unicode_general_category_t gen_cat)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
270 static inline hb_unicode_general_category_t
_hb_glyph_info_get_general_category(const hb_glyph_info_t * info)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
276 static inline bool
_hb_glyph_info_is_unicode_mark(const hb_glyph_info_t * info)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 }
281 static inline void
_hb_glyph_info_set_modified_combining_class(hb_glyph_info_t * info,unsigned int modified_class)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 }
289 static inline unsigned int
_hb_glyph_info_get_modified_combining_class(const hb_glyph_info_t * info)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
296 static inline bool
_hb_glyph_info_is_unicode_space(const hb_glyph_info_t * info)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 }
302 static inline void
_hb_glyph_info_set_unicode_space_fallback_type(hb_glyph_info_t * info,hb_unicode_funcs_t::space_t s)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 }
309 static inline hb_unicode_funcs_t::space_t
_hb_glyph_info_get_unicode_space_fallback_type(const hb_glyph_info_t * info)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
317 static inline bool _hb_glyph_info_substituted (const hb_glyph_info_t *info);
318
319 static inline bool
_hb_glyph_info_is_default_ignorable(const hb_glyph_info_t * info)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_substituted (info);
324 }
325 static inline bool
_hb_glyph_info_is_default_ignorable_and_not_hidden(const hb_glyph_info_t * info)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_substituted (info);
331 }
332 static inline void
_hb_glyph_info_unhide(hb_glyph_info_t * info)333 _hb_glyph_info_unhide (hb_glyph_info_t *info)
334 {
335 info->unicode_props() &= ~ UPROPS_MASK_HIDDEN;
336 }
337
338 static inline void
_hb_glyph_info_set_continuation(hb_glyph_info_t * info)339 _hb_glyph_info_set_continuation (hb_glyph_info_t *info)
340 {
341 info->unicode_props() |= UPROPS_MASK_CONTINUATION;
342 }
343 static inline void
_hb_glyph_info_reset_continuation(hb_glyph_info_t * info)344 _hb_glyph_info_reset_continuation (hb_glyph_info_t *info)
345 {
346 info->unicode_props() &= ~ UPROPS_MASK_CONTINUATION;
347 }
348 static inline bool
_hb_glyph_info_is_continuation(const hb_glyph_info_t * info)349 _hb_glyph_info_is_continuation (const hb_glyph_info_t *info)
350 {
351 return info->unicode_props() & UPROPS_MASK_CONTINUATION;
352 }
353
354 static inline bool
_hb_grapheme_group_func(const hb_glyph_info_t & a HB_UNUSED,const hb_glyph_info_t & b)355 _hb_grapheme_group_func (const hb_glyph_info_t& a HB_UNUSED,
356 const hb_glyph_info_t& b)
357 { return _hb_glyph_info_is_continuation (&b); }
358
359 #define foreach_grapheme(buffer, start, end) \
360 foreach_group (buffer, start, end, _hb_grapheme_group_func)
361
362 static inline void
_hb_ot_layout_reverse_graphemes(hb_buffer_t * buffer)363 _hb_ot_layout_reverse_graphemes (hb_buffer_t *buffer)
364 {
365 buffer->reverse_groups (_hb_grapheme_group_func,
366 buffer->cluster_level == HB_BUFFER_CLUSTER_LEVEL_MONOTONE_CHARACTERS);
367 }
368
369 static inline bool
_hb_glyph_info_is_unicode_format(const hb_glyph_info_t * info)370 _hb_glyph_info_is_unicode_format (const hb_glyph_info_t *info)
371 {
372 return _hb_glyph_info_get_general_category (info) ==
373 HB_UNICODE_GENERAL_CATEGORY_FORMAT;
374 }
375 static inline bool
_hb_glyph_info_is_zwnj(const hb_glyph_info_t * info)376 _hb_glyph_info_is_zwnj (const hb_glyph_info_t *info)
377 {
378 return _hb_glyph_info_is_unicode_format (info) && (info->unicode_props() & UPROPS_MASK_Cf_ZWNJ);
379 }
380 static inline bool
_hb_glyph_info_is_zwj(const hb_glyph_info_t * info)381 _hb_glyph_info_is_zwj (const hb_glyph_info_t *info)
382 {
383 return _hb_glyph_info_is_unicode_format (info) && (info->unicode_props() & UPROPS_MASK_Cf_ZWJ);
384 }
385 static inline bool
_hb_glyph_info_is_joiner(const hb_glyph_info_t * info)386 _hb_glyph_info_is_joiner (const hb_glyph_info_t *info)
387 {
388 return _hb_glyph_info_is_unicode_format (info) && (info->unicode_props() & (UPROPS_MASK_Cf_ZWNJ|UPROPS_MASK_Cf_ZWJ));
389 }
390 static inline void
_hb_glyph_info_flip_joiners(hb_glyph_info_t * info)391 _hb_glyph_info_flip_joiners (hb_glyph_info_t *info)
392 {
393 if (!_hb_glyph_info_is_unicode_format (info))
394 return;
395 info->unicode_props() ^= UPROPS_MASK_Cf_ZWNJ | UPROPS_MASK_Cf_ZWJ;
396 }
397
398 /* lig_props: aka lig_id / lig_comp
399 *
400 * When a ligature is formed:
401 *
402 * - The ligature glyph and any marks in between all the same newly allocated
403 * lig_id,
404 * - The ligature glyph will get lig_num_comps set to the number of components
405 * - The marks get lig_comp > 0, reflecting which component of the ligature
406 * they were applied to.
407 * - This is used in GPOS to attach marks to the right component of a ligature
408 * in MarkLigPos,
409 * - Note that when marks are ligated together, much of the above is skipped
410 * and the current lig_id reused.
411 *
412 * When a multiple-substitution is done:
413 *
414 * - All resulting glyphs will have lig_id = 0,
415 * - The resulting glyphs will have lig_comp = 0, 1, 2, ... respectively.
416 * - This is used in GPOS to attach marks to the first component of a
417 * multiple substitution in MarkBasePos.
418 *
419 * The numbers are also used in GPOS to do mark-to-mark positioning only
420 * to marks that belong to the same component of the same ligature.
421 */
422
423 static inline void
_hb_glyph_info_clear_lig_props(hb_glyph_info_t * info)424 _hb_glyph_info_clear_lig_props (hb_glyph_info_t *info)
425 {
426 info->lig_props() = 0;
427 }
428
429 #define IS_LIG_BASE 0x10
430
431 static inline void
_hb_glyph_info_set_lig_props_for_ligature(hb_glyph_info_t * info,unsigned int lig_id,unsigned int lig_num_comps)432 _hb_glyph_info_set_lig_props_for_ligature (hb_glyph_info_t *info,
433 unsigned int lig_id,
434 unsigned int lig_num_comps)
435 {
436 info->lig_props() = (lig_id << 5) | IS_LIG_BASE | (lig_num_comps & 0x0F);
437 }
438
439 static inline void
_hb_glyph_info_set_lig_props_for_mark(hb_glyph_info_t * info,unsigned int lig_id,unsigned int lig_comp)440 _hb_glyph_info_set_lig_props_for_mark (hb_glyph_info_t *info,
441 unsigned int lig_id,
442 unsigned int lig_comp)
443 {
444 info->lig_props() = (lig_id << 5) | (lig_comp & 0x0F);
445 }
446
447 static inline void
_hb_glyph_info_set_lig_props_for_component(hb_glyph_info_t * info,unsigned int comp)448 _hb_glyph_info_set_lig_props_for_component (hb_glyph_info_t *info, unsigned int comp)
449 {
450 _hb_glyph_info_set_lig_props_for_mark (info, 0, comp);
451 }
452
453 static inline unsigned int
_hb_glyph_info_get_lig_id(const hb_glyph_info_t * info)454 _hb_glyph_info_get_lig_id (const hb_glyph_info_t *info)
455 {
456 return info->lig_props() >> 5;
457 }
458
459 static inline bool
_hb_glyph_info_ligated_internal(const hb_glyph_info_t * info)460 _hb_glyph_info_ligated_internal (const hb_glyph_info_t *info)
461 {
462 return !!(info->lig_props() & IS_LIG_BASE);
463 }
464
465 static inline unsigned int
_hb_glyph_info_get_lig_comp(const hb_glyph_info_t * info)466 _hb_glyph_info_get_lig_comp (const hb_glyph_info_t *info)
467 {
468 if (_hb_glyph_info_ligated_internal (info))
469 return 0;
470 else
471 return info->lig_props() & 0x0F;
472 }
473
474 static inline unsigned int
_hb_glyph_info_get_lig_num_comps(const hb_glyph_info_t * info)475 _hb_glyph_info_get_lig_num_comps (const hb_glyph_info_t *info)
476 {
477 if ((info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE) &&
478 _hb_glyph_info_ligated_internal (info))
479 return info->lig_props() & 0x0F;
480 else
481 return 1;
482 }
483
484 static inline uint8_t
_hb_allocate_lig_id(hb_buffer_t * buffer)485 _hb_allocate_lig_id (hb_buffer_t *buffer)
486 {
487 uint8_t lig_id = buffer->next_serial () & 0x07;
488 return lig_id;
489 }
490
491 /* glyph_props: */
492
493 static inline void
_hb_glyph_info_set_glyph_props(hb_glyph_info_t * info,unsigned int props)494 _hb_glyph_info_set_glyph_props (hb_glyph_info_t *info, unsigned int props)
495 {
496 info->glyph_props() = props;
497 }
498
499 static inline unsigned int
_hb_glyph_info_get_glyph_props(const hb_glyph_info_t * info)500 _hb_glyph_info_get_glyph_props (const hb_glyph_info_t *info)
501 {
502 return info->glyph_props();
503 }
504
505 static inline bool
_hb_glyph_info_is_base_glyph(const hb_glyph_info_t * info)506 _hb_glyph_info_is_base_glyph (const hb_glyph_info_t *info)
507 {
508 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH);
509 }
510
511 static inline bool
_hb_glyph_info_is_ligature(const hb_glyph_info_t * info)512 _hb_glyph_info_is_ligature (const hb_glyph_info_t *info)
513 {
514 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE);
515 }
516
517 static inline bool
_hb_glyph_info_is_mark(const hb_glyph_info_t * info)518 _hb_glyph_info_is_mark (const hb_glyph_info_t *info)
519 {
520 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_MARK);
521 }
522
523 static inline bool
_hb_glyph_info_substituted(const hb_glyph_info_t * info)524 _hb_glyph_info_substituted (const hb_glyph_info_t *info)
525 {
526 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED);
527 }
528
529 static inline bool
_hb_glyph_info_ligated(const hb_glyph_info_t * info)530 _hb_glyph_info_ligated (const hb_glyph_info_t *info)
531 {
532 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATED);
533 }
534
535 static inline bool
_hb_glyph_info_multiplied(const hb_glyph_info_t * info)536 _hb_glyph_info_multiplied (const hb_glyph_info_t *info)
537 {
538 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED);
539 }
540
541 static inline bool
_hb_glyph_info_ligated_and_didnt_multiply(const hb_glyph_info_t * info)542 _hb_glyph_info_ligated_and_didnt_multiply (const hb_glyph_info_t *info)
543 {
544 return _hb_glyph_info_ligated (info) && !_hb_glyph_info_multiplied (info);
545 }
546
547 static inline void
_hb_glyph_info_clear_ligated_and_multiplied(hb_glyph_info_t * info)548 _hb_glyph_info_clear_ligated_and_multiplied (hb_glyph_info_t *info)
549 {
550 info->glyph_props() &= ~(HB_OT_LAYOUT_GLYPH_PROPS_LIGATED |
551 HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED);
552 }
553
554 static inline void
_hb_glyph_info_clear_substituted(hb_glyph_info_t * info)555 _hb_glyph_info_clear_substituted (hb_glyph_info_t *info)
556 {
557 info->glyph_props() &= ~(HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED);
558 }
559
560 static inline void
_hb_clear_substitution_flags(const hb_ot_shape_plan_t * plan HB_UNUSED,hb_font_t * font HB_UNUSED,hb_buffer_t * buffer)561 _hb_clear_substitution_flags (const hb_ot_shape_plan_t *plan HB_UNUSED,
562 hb_font_t *font HB_UNUSED,
563 hb_buffer_t *buffer)
564 {
565 hb_glyph_info_t *info = buffer->info;
566 unsigned int count = buffer->len;
567 for (unsigned int i = 0; i < count; i++)
568 _hb_glyph_info_clear_substituted (&info[i]);
569 }
570
571
572 /* Allocation / deallocation. */
573
574 static inline void
_hb_buffer_allocate_unicode_vars(hb_buffer_t * buffer)575 _hb_buffer_allocate_unicode_vars (hb_buffer_t *buffer)
576 {
577 HB_BUFFER_ALLOCATE_VAR (buffer, unicode_props);
578 }
579
580 static inline void
_hb_buffer_deallocate_unicode_vars(hb_buffer_t * buffer)581 _hb_buffer_deallocate_unicode_vars (hb_buffer_t *buffer)
582 {
583 HB_BUFFER_DEALLOCATE_VAR (buffer, unicode_props);
584 }
585
586 static inline void
_hb_buffer_assert_unicode_vars(hb_buffer_t * buffer)587 _hb_buffer_assert_unicode_vars (hb_buffer_t *buffer)
588 {
589 HB_BUFFER_ASSERT_VAR (buffer, unicode_props);
590 }
591
592 static inline void
_hb_buffer_allocate_gsubgpos_vars(hb_buffer_t * buffer)593 _hb_buffer_allocate_gsubgpos_vars (hb_buffer_t *buffer)
594 {
595 HB_BUFFER_ALLOCATE_VAR (buffer, glyph_props);
596 HB_BUFFER_ALLOCATE_VAR (buffer, lig_props);
597 HB_BUFFER_ALLOCATE_VAR (buffer, syllable);
598 }
599
600 static inline void
_hb_buffer_deallocate_gsubgpos_vars(hb_buffer_t * buffer)601 _hb_buffer_deallocate_gsubgpos_vars (hb_buffer_t *buffer)
602 {
603 HB_BUFFER_DEALLOCATE_VAR (buffer, syllable);
604 HB_BUFFER_DEALLOCATE_VAR (buffer, lig_props);
605 HB_BUFFER_DEALLOCATE_VAR (buffer, glyph_props);
606 }
607
608 static inline void
_hb_buffer_assert_gsubgpos_vars(hb_buffer_t * buffer)609 _hb_buffer_assert_gsubgpos_vars (hb_buffer_t *buffer)
610 {
611 HB_BUFFER_ASSERT_VAR (buffer, glyph_props);
612 HB_BUFFER_ASSERT_VAR (buffer, lig_props);
613 HB_BUFFER_ASSERT_VAR (buffer, syllable);
614 }
615
616 /* Make sure no one directly touches our props... */
617 #undef unicode_props0
618 #undef unicode_props1
619 #undef lig_props
620 #undef glyph_props
621
622 #endif /* HB_OT_LAYOUT_HH */
623