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 #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 */ 201 202 #define foreach_syllable(buffer, start, end) \ 203 for (unsigned int \ 204 _count = buffer->len, \ 205 start = 0, end = _count ? _next_syllable (buffer, 0) : 0; \ 206 start < _count; \ 207 start = end, end = _next_syllable (buffer, start)) 208 209 static inline unsigned int 210 _next_syllable (hb_buffer_t *buffer, unsigned int start) 211 { 212 hb_glyph_info_t *info = buffer->info; 213 unsigned int count = buffer->len; 214 215 unsigned int syllable = info[start].syllable(); 216 while (++start < count && syllable == info[start].syllable()) 217 ; 218 219 return start; 220 } 221 222 223 /* unicode_props */ 224 225 /* Design: 226 * unicode_props() is a two-byte number. The low byte includes: 227 * - General_Category: 5 bits. 228 * - A bit each for: 229 * * Is it Default_Ignorable(); we have a modified Default_Ignorable(). 230 * * Whether it's one of the three Mongolian Free Variation Selectors. 231 * * One free bit right now. 232 * 233 * The high-byte has different meanings, switched by the Gen-Cat: 234 * - For Mn,Mc,Me: the modified Combining_Class. 235 * - For Cf: whether it's ZWJ, ZWNJ, or something else. 236 * - For Ws: index of which space character this is, if space fallback 237 * is needed, ie. we don't set this by default, only if asked to. 238 */ 239 240 enum hb_unicode_props_flags_t { 241 UPROPS_MASK_GEN_CAT = 0x001Fu, 242 UPROPS_MASK_IGNORABLE = 0x0020u, 243 UPROPS_MASK_FVS = 0x0040u, /* MONGOLIAN FREE VARIATION SELECTOR 1..3 */ 244 245 /* If GEN_CAT=FORMAT, top byte masks: */ 246 UPROPS_MASK_Cf_ZWJ = 0x0100u, 247 UPROPS_MASK_Cf_ZWNJ = 0x0200u 248 }; 249 HB_MARK_AS_FLAG_T (hb_unicode_props_flags_t); 250 251 static inline void 252 _hb_glyph_info_set_unicode_props (hb_glyph_info_t *info, hb_buffer_t *buffer) 253 { 254 hb_unicode_funcs_t *unicode = buffer->unicode; 255 unsigned int u = info->codepoint; 256 unsigned int gen_cat = (unsigned int) unicode->general_category (u); 257 unsigned int props = gen_cat; 258 259 if (u >= 0x80) 260 { 261 buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_NON_ASCII; 262 if (unlikely (unicode->is_default_ignorable (u))) 263 { 264 buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_DEFAULT_IGNORABLES; 265 props |= UPROPS_MASK_IGNORABLE; 266 if (u == 0x200Cu) props |= UPROPS_MASK_Cf_ZWNJ; 267 if (u == 0x200Du) props |= UPROPS_MASK_Cf_ZWJ; 268 /* Mongolian Free Variation Selectors need to be remembered 269 * because although we need to hide them like default-ignorables, 270 * they need to non-ignorable during shaping. This is similar to 271 * what we do for joiners in Indic-like shapers, but since the 272 * FVSes are GC=Mn, we have use a separate bit to remember them. 273 * Fixes: 274 * https://github.com/behdad/harfbuzz/issues/234 275 */ 276 if (unlikely (hb_in_range (u, 0x180Bu, 0x180Du))) props |= UPROPS_MASK_FVS; 277 } 278 else if (unlikely (HB_UNICODE_GENERAL_CATEGORY_IS_NON_ENCLOSING_MARK_OR_MODIFIER_SYMBOL (gen_cat))) 279 { 280 /* The above check is just an optimization to let in only things we need further 281 * processing on. */ 282 283 /* Only Mn and Mc can have non-zero ccc: 284 * http://www.unicode.org/policies/stability_policy.html#Property_Value 285 * """ 286 * Canonical_Combining_Class, General_Category 287 * All characters other than those with General_Category property values 288 * Spacing_Mark (Mc) and Nonspacing_Mark (Mn) have the Canonical_Combining_Class 289 * property value 0. 290 * 1.1.5+ 291 * """ 292 * 293 * Also, all Mn's that are Default_Ignorable, have ccc=0, hence 294 * the "else if". 295 */ 296 props |= unicode->modified_combining_class (info->codepoint)<<8; 297 298 /* Recategorize emoji skin-tone modifiers as Unicode mark, so they 299 * behave correctly in non-native directionality. They originally 300 * are MODIFIER_SYMBOL. Fixes: 301 * https://github.com/behdad/harfbuzz/issues/169 302 */ 303 if (unlikely (hb_in_range (u, 0x1F3FBu, 0x1F3FFu))) 304 { 305 props = gen_cat = HB_UNICODE_GENERAL_CATEGORY_ENCLOSING_MARK; 306 } 307 } 308 } 309 310 info->unicode_props() = props; 311 } 312 313 static inline void 314 _hb_glyph_info_set_general_category (hb_glyph_info_t *info, 315 hb_unicode_general_category_t gen_cat) 316 { 317 /* Clears top-byte. */ 318 info->unicode_props() = (unsigned int) gen_cat | (info->unicode_props() & (0xFF & ~UPROPS_MASK_GEN_CAT)); 319 } 320 321 static inline hb_unicode_general_category_t 322 _hb_glyph_info_get_general_category (const hb_glyph_info_t *info) 323 { 324 return (hb_unicode_general_category_t) (info->unicode_props() & UPROPS_MASK_GEN_CAT); 325 } 326 327 static inline bool 328 _hb_glyph_info_is_unicode_mark (const hb_glyph_info_t *info) 329 { 330 return HB_UNICODE_GENERAL_CATEGORY_IS_MARK (info->unicode_props() & UPROPS_MASK_GEN_CAT); 331 } 332 static inline void 333 _hb_glyph_info_set_modified_combining_class (hb_glyph_info_t *info, 334 unsigned int modified_class) 335 { 336 if (unlikely (!_hb_glyph_info_is_unicode_mark (info))) 337 return; 338 info->unicode_props() = (modified_class<<8) | (info->unicode_props() & 0xFF); 339 } 340 static inline unsigned int 341 _hb_glyph_info_get_modified_combining_class (const hb_glyph_info_t *info) 342 { 343 return _hb_glyph_info_is_unicode_mark (info) ? info->unicode_props()>>8 : 0; 344 } 345 346 static inline bool 347 _hb_glyph_info_is_unicode_space (const hb_glyph_info_t *info) 348 { 349 return _hb_glyph_info_get_general_category (info) == 350 HB_UNICODE_GENERAL_CATEGORY_SPACE_SEPARATOR; 351 } 352 static inline void 353 _hb_glyph_info_set_unicode_space_fallback_type (hb_glyph_info_t *info, hb_unicode_funcs_t::space_t s) 354 { 355 if (unlikely (!_hb_glyph_info_is_unicode_space (info))) 356 return; 357 info->unicode_props() = (((unsigned int) s)<<8) | (info->unicode_props() & 0xFF); 358 } 359 static inline hb_unicode_funcs_t::space_t 360 _hb_glyph_info_get_unicode_space_fallback_type (const hb_glyph_info_t *info) 361 { 362 return _hb_glyph_info_is_unicode_space (info) ? 363 (hb_unicode_funcs_t::space_t) (info->unicode_props()>>8) : 364 hb_unicode_funcs_t::NOT_SPACE; 365 } 366 367 static inline bool _hb_glyph_info_ligated (const hb_glyph_info_t *info); 368 369 static inline hb_bool_t 370 _hb_glyph_info_is_default_ignorable (const hb_glyph_info_t *info) 371 { 372 return (info->unicode_props() & UPROPS_MASK_IGNORABLE) && 373 !_hb_glyph_info_ligated (info); 374 } 375 static inline hb_bool_t 376 _hb_glyph_info_is_default_ignorable_and_not_fvs (const hb_glyph_info_t *info) 377 { 378 return ((info->unicode_props() & (UPROPS_MASK_IGNORABLE|UPROPS_MASK_FVS)) 379 == UPROPS_MASK_IGNORABLE) && 380 !_hb_glyph_info_ligated (info); 381 } 382 383 static inline bool 384 _hb_glyph_info_is_unicode_format (const hb_glyph_info_t *info) 385 { 386 return _hb_glyph_info_get_general_category (info) == 387 HB_UNICODE_GENERAL_CATEGORY_FORMAT; 388 } 389 static inline hb_bool_t 390 _hb_glyph_info_is_zwnj (const hb_glyph_info_t *info) 391 { 392 return _hb_glyph_info_is_unicode_format (info) && (info->unicode_props() & UPROPS_MASK_Cf_ZWNJ); 393 } 394 static inline hb_bool_t 395 _hb_glyph_info_is_zwj (const hb_glyph_info_t *info) 396 { 397 return _hb_glyph_info_is_unicode_format (info) && (info->unicode_props() & UPROPS_MASK_Cf_ZWJ); 398 } 399 static inline hb_bool_t 400 _hb_glyph_info_is_joiner (const hb_glyph_info_t *info) 401 { 402 return _hb_glyph_info_is_unicode_format (info) && (info->unicode_props() & (UPROPS_MASK_Cf_ZWNJ|UPROPS_MASK_Cf_ZWJ)); 403 } 404 static inline void 405 _hb_glyph_info_flip_joiners (hb_glyph_info_t *info) 406 { 407 if (!_hb_glyph_info_is_unicode_format (info)) 408 return; 409 info->unicode_props() ^= UPROPS_MASK_Cf_ZWNJ | UPROPS_MASK_Cf_ZWJ; 410 } 411 412 /* lig_props: aka lig_id / lig_comp 413 * 414 * When a ligature is formed: 415 * 416 * - The ligature glyph and any marks in between all the same newly allocated 417 * lig_id, 418 * - The ligature glyph will get lig_num_comps set to the number of components 419 * - The marks get lig_comp > 0, reflecting which component of the ligature 420 * they were applied to. 421 * - This is used in GPOS to attach marks to the right component of a ligature 422 * in MarkLigPos, 423 * - Note that when marks are ligated together, much of the above is skipped 424 * and the current lig_id reused. 425 * 426 * When a multiple-substitution is done: 427 * 428 * - All resulting glyphs will have lig_id = 0, 429 * - The resulting glyphs will have lig_comp = 0, 1, 2, ... respectively. 430 * - This is used in GPOS to attach marks to the first component of a 431 * multiple substitution in MarkBasePos. 432 * 433 * The numbers are also used in GPOS to do mark-to-mark positioning only 434 * to marks that belong to the same component of the same ligature. 435 */ 436 437 static inline void 438 _hb_glyph_info_clear_lig_props (hb_glyph_info_t *info) 439 { 440 info->lig_props() = 0; 441 } 442 443 #define IS_LIG_BASE 0x10 444 445 static inline void 446 _hb_glyph_info_set_lig_props_for_ligature (hb_glyph_info_t *info, 447 unsigned int lig_id, 448 unsigned int lig_num_comps) 449 { 450 info->lig_props() = (lig_id << 5) | IS_LIG_BASE | (lig_num_comps & 0x0F); 451 } 452 453 static inline void 454 _hb_glyph_info_set_lig_props_for_mark (hb_glyph_info_t *info, 455 unsigned int lig_id, 456 unsigned int lig_comp) 457 { 458 info->lig_props() = (lig_id << 5) | (lig_comp & 0x0F); 459 } 460 461 static inline void 462 _hb_glyph_info_set_lig_props_for_component (hb_glyph_info_t *info, unsigned int comp) 463 { 464 _hb_glyph_info_set_lig_props_for_mark (info, 0, comp); 465 } 466 467 static inline unsigned int 468 _hb_glyph_info_get_lig_id (const hb_glyph_info_t *info) 469 { 470 return info->lig_props() >> 5; 471 } 472 473 static inline bool 474 _hb_glyph_info_ligated_internal (const hb_glyph_info_t *info) 475 { 476 return !!(info->lig_props() & IS_LIG_BASE); 477 } 478 479 static inline unsigned int 480 _hb_glyph_info_get_lig_comp (const hb_glyph_info_t *info) 481 { 482 if (_hb_glyph_info_ligated_internal (info)) 483 return 0; 484 else 485 return info->lig_props() & 0x0F; 486 } 487 488 static inline unsigned int 489 _hb_glyph_info_get_lig_num_comps (const hb_glyph_info_t *info) 490 { 491 if ((info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE) && 492 _hb_glyph_info_ligated_internal (info)) 493 return info->lig_props() & 0x0F; 494 else 495 return 1; 496 } 497 498 static inline uint8_t 499 _hb_allocate_lig_id (hb_buffer_t *buffer) { 500 uint8_t lig_id = buffer->next_serial () & 0x07; 501 if (unlikely (!lig_id)) 502 lig_id = _hb_allocate_lig_id (buffer); /* in case of overflow */ 503 return lig_id; 504 } 505 506 /* glyph_props: */ 507 508 static inline void 509 _hb_glyph_info_set_glyph_props (hb_glyph_info_t *info, unsigned int props) 510 { 511 info->glyph_props() = props; 512 } 513 514 static inline unsigned int 515 _hb_glyph_info_get_glyph_props (const hb_glyph_info_t *info) 516 { 517 return info->glyph_props(); 518 } 519 520 static inline bool 521 _hb_glyph_info_is_base_glyph (const hb_glyph_info_t *info) 522 { 523 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH); 524 } 525 526 static inline bool 527 _hb_glyph_info_is_ligature (const hb_glyph_info_t *info) 528 { 529 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE); 530 } 531 532 static inline bool 533 _hb_glyph_info_is_mark (const hb_glyph_info_t *info) 534 { 535 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_MARK); 536 } 537 538 static inline bool 539 _hb_glyph_info_substituted (const hb_glyph_info_t *info) 540 { 541 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED); 542 } 543 544 static inline bool 545 _hb_glyph_info_ligated (const hb_glyph_info_t *info) 546 { 547 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATED); 548 } 549 550 static inline bool 551 _hb_glyph_info_multiplied (const hb_glyph_info_t *info) 552 { 553 return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED); 554 } 555 556 static inline bool 557 _hb_glyph_info_ligated_and_didnt_multiply (const hb_glyph_info_t *info) 558 { 559 return _hb_glyph_info_ligated (info) && !_hb_glyph_info_multiplied (info); 560 } 561 562 static inline void 563 _hb_glyph_info_clear_ligated_and_multiplied (hb_glyph_info_t *info) 564 { 565 info->glyph_props() &= ~(HB_OT_LAYOUT_GLYPH_PROPS_LIGATED | 566 HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED); 567 } 568 569 static inline void 570 _hb_glyph_info_clear_substituted (hb_glyph_info_t *info) 571 { 572 info->glyph_props() &= ~(HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED); 573 } 574 575 576 /* Allocation / deallocation. */ 577 578 static inline void 579 _hb_buffer_allocate_unicode_vars (hb_buffer_t *buffer) 580 { 581 HB_BUFFER_ALLOCATE_VAR (buffer, unicode_props); 582 } 583 584 static inline void 585 _hb_buffer_deallocate_unicode_vars (hb_buffer_t *buffer) 586 { 587 HB_BUFFER_DEALLOCATE_VAR (buffer, unicode_props); 588 } 589 590 static inline void 591 _hb_buffer_assert_unicode_vars (hb_buffer_t *buffer) 592 { 593 HB_BUFFER_ASSERT_VAR (buffer, unicode_props); 594 } 595 596 static inline void 597 _hb_buffer_allocate_gsubgpos_vars (hb_buffer_t *buffer) 598 { 599 HB_BUFFER_ALLOCATE_VAR (buffer, glyph_props); 600 HB_BUFFER_ALLOCATE_VAR (buffer, lig_props); 601 HB_BUFFER_ALLOCATE_VAR (buffer, syllable); 602 } 603 604 static inline void 605 _hb_buffer_deallocate_gsubgpos_vars (hb_buffer_t *buffer) 606 { 607 HB_BUFFER_DEALLOCATE_VAR (buffer, syllable); 608 HB_BUFFER_DEALLOCATE_VAR (buffer, lig_props); 609 HB_BUFFER_DEALLOCATE_VAR (buffer, glyph_props); 610 } 611 612 static inline void 613 _hb_buffer_assert_gsubgpos_vars (hb_buffer_t *buffer) 614 { 615 HB_BUFFER_ASSERT_VAR (buffer, glyph_props); 616 HB_BUFFER_ASSERT_VAR (buffer, lig_props); 617 HB_BUFFER_ASSERT_VAR (buffer, syllable); 618 } 619 620 /* Make sure no one directly touches our props... */ 621 #undef unicode_props0 622 #undef unicode_props1 623 #undef lig_props 624 #undef glyph_props 625 626 627 #endif /* HB_OT_LAYOUT_PRIVATE_HH */ 628
