hb-ot-layout.h (19223B)
1 /* 2 * Copyright © 2007,2008,2009 Red Hat, Inc. 3 * 4 * This is part of HarfBuzz, a text shaping library. 5 * 6 * Permission is hereby granted, without written agreement and without 7 * license or royalty fees, to use, copy, modify, and distribute this 8 * software and its documentation for any purpose, provided that the 9 * above copyright notice and the following two paragraphs appear in 10 * all copies of this software. 11 * 12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR 13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES 14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN 15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH 16 * DAMAGE. 17 * 18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, 19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS 21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO 22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. 23 * 24 * Red Hat Author(s): Behdad Esfahbod 25 */ 26 27 #if !defined(HB_OT_H_IN) && !defined(HB_NO_SINGLE_HEADER_ERROR) 28 #error "Include <hb-ot.h> instead." 29 #endif 30 31 #ifndef HB_OT_LAYOUT_H 32 #define HB_OT_LAYOUT_H 33 34 #include "hb.h" 35 36 #include "hb-ot-name.h" 37 38 HB_BEGIN_DECLS 39 40 41 /** 42 * HB_OT_TAG_BASE: 43 * 44 * OpenType [Baseline Table](https://docs.microsoft.com/en-us/typography/opentype/spec/base). 45 */ 46 #define HB_OT_TAG_BASE HB_TAG('B','A','S','E') 47 /** 48 * HB_OT_TAG_GDEF: 49 * 50 * OpenType [Glyph Definition Table](https://docs.microsoft.com/en-us/typography/opentype/spec/gdef). 51 */ 52 #define HB_OT_TAG_GDEF HB_TAG('G','D','E','F') 53 /** 54 * HB_OT_TAG_GSUB: 55 * 56 * OpenType [Glyph Substitution Table](https://docs.microsoft.com/en-us/typography/opentype/spec/gsub). 57 */ 58 #define HB_OT_TAG_GSUB HB_TAG('G','S','U','B') 59 /** 60 * HB_OT_TAG_GPOS: 61 * 62 * OpenType [Glyph Positioning Table](https://docs.microsoft.com/en-us/typography/opentype/spec/gpos). 63 */ 64 #define HB_OT_TAG_GPOS HB_TAG('G','P','O','S') 65 /** 66 * HB_OT_TAG_JSTF: 67 * 68 * OpenType [Justification Table](https://docs.microsoft.com/en-us/typography/opentype/spec/jstf). 69 */ 70 #define HB_OT_TAG_JSTF HB_TAG('J','S','T','F') 71 72 73 /* 74 * Script & Language tags. 75 */ 76 77 /** 78 * HB_OT_TAG_DEFAULT_SCRIPT: 79 * 80 * OpenType script tag, `DFLT`, for features that are not script-specific. 81 * 82 */ 83 #define HB_OT_TAG_DEFAULT_SCRIPT HB_TAG ('D', 'F', 'L', 'T') 84 /** 85 * HB_OT_TAG_DEFAULT_LANGUAGE: 86 * 87 * OpenType language tag, `dflt`. Not a valid language tag, but some fonts 88 * mistakenly use it. 89 */ 90 #define HB_OT_TAG_DEFAULT_LANGUAGE HB_TAG ('d', 'f', 'l', 't') 91 92 /** 93 * HB_OT_MAX_TAGS_PER_SCRIPT: 94 * 95 * Maximum number of OpenType tags that can correspond to a give #hb_script_t. 96 * 97 * Since: 2.0.0 98 **/ 99 #define HB_OT_MAX_TAGS_PER_SCRIPT 3u 100 /** 101 * HB_OT_MAX_TAGS_PER_LANGUAGE: 102 * 103 * Maximum number of OpenType tags that can correspond to a give #hb_language_t. 104 * 105 * Since: 2.0.0 106 **/ 107 #define HB_OT_MAX_TAGS_PER_LANGUAGE 3u 108 109 HB_EXTERN void 110 hb_ot_tags_from_script_and_language (hb_script_t script, 111 hb_language_t language, 112 unsigned int *script_count /* IN/OUT */, 113 hb_tag_t *script_tags /* OUT */, 114 unsigned int *language_count /* IN/OUT */, 115 hb_tag_t *language_tags /* OUT */); 116 117 HB_EXTERN hb_script_t 118 hb_ot_tag_to_script (hb_tag_t tag); 119 120 HB_EXTERN hb_language_t 121 hb_ot_tag_to_language (hb_tag_t tag); 122 123 HB_EXTERN void 124 hb_ot_tags_to_script_and_language (hb_tag_t script_tag, 125 hb_tag_t language_tag, 126 hb_script_t *script /* OUT */, 127 hb_language_t *language /* OUT */); 128 129 130 /* 131 * GDEF 132 */ 133 134 HB_EXTERN hb_bool_t 135 hb_ot_layout_has_glyph_classes (hb_face_t *face); 136 137 /** 138 * hb_ot_layout_glyph_class_t: 139 * @HB_OT_LAYOUT_GLYPH_CLASS_UNCLASSIFIED: Glyphs not matching the other classifications 140 * @HB_OT_LAYOUT_GLYPH_CLASS_BASE_GLYPH: Spacing, single characters, capable of accepting marks 141 * @HB_OT_LAYOUT_GLYPH_CLASS_LIGATURE: Glyphs that represent ligation of multiple characters 142 * @HB_OT_LAYOUT_GLYPH_CLASS_MARK: Non-spacing, combining glyphs that represent marks 143 * @HB_OT_LAYOUT_GLYPH_CLASS_COMPONENT: Spacing glyphs that represent part of a single character 144 * 145 * The GDEF classes defined for glyphs. 146 * 147 **/ 148 typedef enum { 149 HB_OT_LAYOUT_GLYPH_CLASS_UNCLASSIFIED = 0, 150 HB_OT_LAYOUT_GLYPH_CLASS_BASE_GLYPH = 1, 151 HB_OT_LAYOUT_GLYPH_CLASS_LIGATURE = 2, 152 HB_OT_LAYOUT_GLYPH_CLASS_MARK = 3, 153 HB_OT_LAYOUT_GLYPH_CLASS_COMPONENT = 4 154 } hb_ot_layout_glyph_class_t; 155 156 HB_EXTERN hb_ot_layout_glyph_class_t 157 hb_ot_layout_get_glyph_class (hb_face_t *face, 158 hb_codepoint_t glyph); 159 160 HB_EXTERN void 161 hb_ot_layout_get_glyphs_in_class (hb_face_t *face, 162 hb_ot_layout_glyph_class_t klass, 163 hb_set_t *glyphs /* OUT */); 164 165 /* Not that useful. Provides list of attach points for a glyph that a 166 * client may want to cache */ 167 HB_EXTERN unsigned int 168 hb_ot_layout_get_attach_points (hb_face_t *face, 169 hb_codepoint_t glyph, 170 unsigned int start_offset, 171 unsigned int *point_count /* IN/OUT */, 172 unsigned int *point_array /* OUT */); 173 174 /* Ligature caret positions */ 175 HB_EXTERN unsigned int 176 hb_ot_layout_get_ligature_carets (hb_font_t *font, 177 hb_direction_t direction, 178 hb_codepoint_t glyph, 179 unsigned int start_offset, 180 unsigned int *caret_count /* IN/OUT */, 181 hb_position_t *caret_array /* OUT */); 182 183 184 /* 185 * GSUB/GPOS feature query and enumeration interface 186 */ 187 188 /** 189 * HB_OT_LAYOUT_NO_SCRIPT_INDEX: 190 * 191 * Special value for script index indicating unsupported script. 192 */ 193 #define HB_OT_LAYOUT_NO_SCRIPT_INDEX 0xFFFFu 194 /** 195 * HB_OT_LAYOUT_NO_FEATURE_INDEX: 196 * 197 * Special value for feature index indicating unsupported feature. 198 */ 199 #define HB_OT_LAYOUT_NO_FEATURE_INDEX 0xFFFFu 200 /** 201 * HB_OT_LAYOUT_DEFAULT_LANGUAGE_INDEX: 202 * 203 * Special value for language index indicating default or unsupported language. 204 */ 205 #define HB_OT_LAYOUT_DEFAULT_LANGUAGE_INDEX 0xFFFFu 206 /** 207 * HB_OT_LAYOUT_NO_VARIATIONS_INDEX: 208 * 209 * Special value for variations index indicating unsupported variation. 210 */ 211 #define HB_OT_LAYOUT_NO_VARIATIONS_INDEX 0xFFFFFFFFu 212 213 HB_EXTERN unsigned int 214 hb_ot_layout_table_get_script_tags (hb_face_t *face, 215 hb_tag_t table_tag, 216 unsigned int start_offset, 217 unsigned int *script_count /* IN/OUT */, 218 hb_tag_t *script_tags /* OUT */); 219 220 HB_EXTERN hb_bool_t 221 hb_ot_layout_table_find_script (hb_face_t *face, 222 hb_tag_t table_tag, 223 hb_tag_t script_tag, 224 unsigned int *script_index /* OUT */); 225 226 HB_EXTERN hb_bool_t 227 hb_ot_layout_table_select_script (hb_face_t *face, 228 hb_tag_t table_tag, 229 unsigned int script_count, 230 const hb_tag_t *script_tags, 231 unsigned int *script_index /* OUT */, 232 hb_tag_t *chosen_script /* OUT */); 233 234 HB_EXTERN unsigned int 235 hb_ot_layout_table_get_feature_tags (hb_face_t *face, 236 hb_tag_t table_tag, 237 unsigned int start_offset, 238 unsigned int *feature_count /* IN/OUT */, 239 hb_tag_t *feature_tags /* OUT */); 240 241 HB_EXTERN unsigned int 242 hb_ot_layout_script_get_language_tags (hb_face_t *face, 243 hb_tag_t table_tag, 244 unsigned int script_index, 245 unsigned int start_offset, 246 unsigned int *language_count /* IN/OUT */, 247 hb_tag_t *language_tags /* OUT */); 248 249 HB_EXTERN hb_bool_t 250 hb_ot_layout_script_select_language (hb_face_t *face, 251 hb_tag_t table_tag, 252 unsigned int script_index, 253 unsigned int language_count, 254 const hb_tag_t *language_tags, 255 unsigned int *language_index /* OUT */); 256 257 HB_EXTERN hb_bool_t 258 hb_ot_layout_script_select_language2 (hb_face_t *face, 259 hb_tag_t table_tag, 260 unsigned int script_index, 261 unsigned int language_count, 262 const hb_tag_t *language_tags, 263 unsigned int *language_index /* OUT */, 264 hb_tag_t *chosen_language /* OUT */); 265 266 HB_EXTERN hb_bool_t 267 hb_ot_layout_language_get_required_feature_index (hb_face_t *face, 268 hb_tag_t table_tag, 269 unsigned int script_index, 270 unsigned int language_index, 271 unsigned int *feature_index /* OUT */); 272 273 HB_EXTERN hb_bool_t 274 hb_ot_layout_language_get_required_feature (hb_face_t *face, 275 hb_tag_t table_tag, 276 unsigned int script_index, 277 unsigned int language_index, 278 unsigned int *feature_index /* OUT */, 279 hb_tag_t *feature_tag /* OUT */); 280 281 HB_EXTERN unsigned int 282 hb_ot_layout_language_get_feature_indexes (hb_face_t *face, 283 hb_tag_t table_tag, 284 unsigned int script_index, 285 unsigned int language_index, 286 unsigned int start_offset, 287 unsigned int *feature_count /* IN/OUT */, 288 unsigned int *feature_indexes /* OUT */); 289 290 HB_EXTERN unsigned int 291 hb_ot_layout_language_get_feature_tags (hb_face_t *face, 292 hb_tag_t table_tag, 293 unsigned int script_index, 294 unsigned int language_index, 295 unsigned int start_offset, 296 unsigned int *feature_count /* IN/OUT */, 297 hb_tag_t *feature_tags /* OUT */); 298 299 HB_EXTERN hb_bool_t 300 hb_ot_layout_language_find_feature (hb_face_t *face, 301 hb_tag_t table_tag, 302 unsigned int script_index, 303 unsigned int language_index, 304 hb_tag_t feature_tag, 305 unsigned int *feature_index /* OUT */); 306 307 HB_EXTERN unsigned int 308 hb_ot_layout_feature_get_lookups (hb_face_t *face, 309 hb_tag_t table_tag, 310 unsigned int feature_index, 311 unsigned int start_offset, 312 unsigned int *lookup_count /* IN/OUT */, 313 unsigned int *lookup_indexes /* OUT */); 314 315 HB_EXTERN unsigned int 316 hb_ot_layout_table_get_lookup_count (hb_face_t *face, 317 hb_tag_t table_tag); 318 319 HB_EXTERN void 320 hb_ot_layout_collect_features (hb_face_t *face, 321 hb_tag_t table_tag, 322 const hb_tag_t *scripts, 323 const hb_tag_t *languages, 324 const hb_tag_t *features, 325 hb_set_t *feature_indexes /* OUT */); 326 327 HB_EXTERN void 328 hb_ot_layout_collect_features_map (hb_face_t *face, 329 hb_tag_t table_tag, 330 unsigned script_index, 331 unsigned language_index, 332 hb_map_t *feature_map /* OUT */); 333 334 HB_EXTERN void 335 hb_ot_layout_collect_lookups (hb_face_t *face, 336 hb_tag_t table_tag, 337 const hb_tag_t *scripts, 338 const hb_tag_t *languages, 339 const hb_tag_t *features, 340 hb_set_t *lookup_indexes /* OUT */); 341 342 HB_EXTERN void 343 hb_ot_layout_lookup_collect_glyphs (hb_face_t *face, 344 hb_tag_t table_tag, 345 unsigned int lookup_index, 346 hb_set_t *glyphs_before, /* OUT. May be NULL */ 347 hb_set_t *glyphs_input, /* OUT. May be NULL */ 348 hb_set_t *glyphs_after, /* OUT. May be NULL */ 349 hb_set_t *glyphs_output /* OUT. May be NULL */); 350 351 352 /* Variations support */ 353 354 HB_EXTERN hb_bool_t 355 hb_ot_layout_table_find_feature_variations (hb_face_t *face, 356 hb_tag_t table_tag, 357 const int *coords, 358 unsigned int num_coords, 359 unsigned int *variations_index /* out */); 360 361 HB_EXTERN unsigned int 362 hb_ot_layout_feature_with_variations_get_lookups (hb_face_t *face, 363 hb_tag_t table_tag, 364 unsigned int feature_index, 365 unsigned int variations_index, 366 unsigned int start_offset, 367 unsigned int *lookup_count /* IN/OUT */, 368 unsigned int *lookup_indexes /* OUT */); 369 370 371 /* 372 * GSUB 373 */ 374 375 HB_EXTERN hb_bool_t 376 hb_ot_layout_has_substitution (hb_face_t *face); 377 378 HB_EXTERN unsigned 379 hb_ot_layout_lookup_get_glyph_alternates (hb_face_t *face, 380 unsigned lookup_index, 381 hb_codepoint_t glyph, 382 unsigned start_offset, 383 unsigned *alternate_count /* IN/OUT */, 384 hb_codepoint_t *alternate_glyphs /* OUT */); 385 386 HB_EXTERN hb_bool_t 387 hb_ot_layout_lookup_collect_glyph_alternates (hb_face_t *face, 388 unsigned lookup_index, 389 hb_map_t *alternate_count /* IN/OUT */, 390 hb_map_t *alternate_glyphs /* IN/OUT */); 391 392 HB_EXTERN hb_bool_t 393 hb_ot_layout_lookup_would_substitute (hb_face_t *face, 394 unsigned int lookup_index, 395 const hb_codepoint_t *glyphs, 396 unsigned int glyphs_length, 397 hb_bool_t zero_context); 398 399 HB_EXTERN void 400 hb_ot_layout_lookup_substitute_closure (hb_face_t *face, 401 unsigned int lookup_index, 402 hb_set_t *glyphs 403 /*TODO , hb_bool_t inclusive */); 404 405 HB_EXTERN void 406 hb_ot_layout_lookups_substitute_closure (hb_face_t *face, 407 const hb_set_t *lookups, 408 hb_set_t *glyphs); 409 410 411 /* 412 * GPOS 413 */ 414 415 HB_EXTERN hb_bool_t 416 hb_ot_layout_has_positioning (hb_face_t *face); 417 418 /* Optical 'size' feature info. Returns true if found. 419 * https://docs.microsoft.com/en-us/typography/opentype/spec/features_pt#size */ 420 HB_EXTERN hb_bool_t 421 hb_ot_layout_get_size_params (hb_face_t *face, 422 unsigned int *design_size, /* OUT. May be NULL */ 423 unsigned int *subfamily_id, /* OUT. May be NULL */ 424 hb_ot_name_id_t *subfamily_name_id, /* OUT. May be NULL */ 425 unsigned int *range_start, /* OUT. May be NULL */ 426 unsigned int *range_end /* OUT. May be NULL */); 427 428 HB_EXTERN hb_position_t 429 hb_ot_layout_lookup_get_optical_bound (hb_font_t *font, 430 unsigned lookup_index, 431 hb_direction_t direction, 432 hb_codepoint_t glyph); 433 434 435 /* 436 * GSUB/GPOS 437 */ 438 439 HB_EXTERN hb_bool_t 440 hb_ot_layout_feature_get_name_ids (hb_face_t *face, 441 hb_tag_t table_tag, 442 unsigned int feature_index, 443 hb_ot_name_id_t *label_id /* OUT. May be NULL */, 444 hb_ot_name_id_t *tooltip_id /* OUT. May be NULL */, 445 hb_ot_name_id_t *sample_id /* OUT. May be NULL */, 446 unsigned int *num_named_parameters /* OUT. May be NULL */, 447 hb_ot_name_id_t *first_param_id /* OUT. May be NULL */); 448 449 450 HB_EXTERN unsigned int 451 hb_ot_layout_feature_get_characters (hb_face_t *face, 452 hb_tag_t table_tag, 453 unsigned int feature_index, 454 unsigned int start_offset, 455 unsigned int *char_count /* IN/OUT. May be NULL */, 456 hb_codepoint_t *characters /* OUT. May be NULL */); 457 458 459 /* 460 * BASE 461 */ 462 463 HB_EXTERN hb_bool_t 464 hb_ot_layout_get_font_extents (hb_font_t *font, 465 hb_direction_t direction, 466 hb_tag_t script_tag, 467 hb_tag_t language_tag, 468 hb_font_extents_t *extents); 469 470 HB_EXTERN hb_bool_t 471 hb_ot_layout_get_font_extents2 (hb_font_t *font, 472 hb_direction_t direction, 473 hb_script_t script, 474 hb_language_t language, 475 hb_font_extents_t *extents); 476 477 /** 478 * hb_ot_layout_baseline_tag_t: 479 * @HB_OT_LAYOUT_BASELINE_TAG_ROMAN: The baseline used by alphabetic scripts such as Latin, Cyrillic and Greek. 480 * In vertical writing mode, the alphabetic baseline for characters rotated 90 degrees clockwise. 481 * (This would not apply to alphabetic characters that remain upright in vertical writing mode, since these 482 * characters are not rotated.) 483 * @HB_OT_LAYOUT_BASELINE_TAG_HANGING: The hanging baseline. In horizontal direction, this is the horizontal 484 * line from which syllables seem, to hang in Tibetan and other similar scripts. In vertical writing mode, 485 * for Tibetan (or some other similar script) characters rotated 90 degrees clockwise. 486 * @HB_OT_LAYOUT_BASELINE_TAG_IDEO_FACE_BOTTOM_OR_LEFT: Ideographic character face bottom or left edge, 487 * if the direction is horizontal or vertical, respectively. 488 * @HB_OT_LAYOUT_BASELINE_TAG_IDEO_FACE_TOP_OR_RIGHT: Ideographic character face top or right edge, 489 * if the direction is horizontal or vertical, respectively. 490 * @HB_OT_LAYOUT_BASELINE_TAG_IDEO_FACE_CENTRAL: The center of the ideographic character face. Since: 4.0.0 491 * @HB_OT_LAYOUT_BASELINE_TAG_IDEO_EMBOX_BOTTOM_OR_LEFT: Ideographic em-box bottom or left edge, 492 * if the direction is horizontal or vertical, respectively. 493 * @HB_OT_LAYOUT_BASELINE_TAG_IDEO_EMBOX_TOP_OR_RIGHT: Ideographic em-box top or right edge baseline, 494 * @HB_OT_LAYOUT_BASELINE_TAG_IDEO_EMBOX_CENTRAL: The center of the ideographic em-box. Since: 4.0.0 495 * if the direction is horizontal or vertical, respectively. 496 * @HB_OT_LAYOUT_BASELINE_TAG_MATH: The baseline about which mathematical characters are centered. 497 * In vertical writing mode when mathematical characters rotated 90 degrees clockwise, are centered. 498 * 499 * Baseline tags from [Baseline Tags](https://docs.microsoft.com/en-us/typography/opentype/spec/baselinetags) registry. 500 * 501 * Since: 2.6.0 502 */ 503 typedef enum { 504 HB_OT_LAYOUT_BASELINE_TAG_ROMAN = HB_TAG ('r','o','m','n'), 505 HB_OT_LAYOUT_BASELINE_TAG_HANGING = HB_TAG ('h','a','n','g'), 506 HB_OT_LAYOUT_BASELINE_TAG_IDEO_FACE_BOTTOM_OR_LEFT = HB_TAG ('i','c','f','b'), 507 HB_OT_LAYOUT_BASELINE_TAG_IDEO_FACE_TOP_OR_RIGHT = HB_TAG ('i','c','f','t'), 508 HB_OT_LAYOUT_BASELINE_TAG_IDEO_FACE_CENTRAL = HB_TAG ('I','c','f','c'), 509 HB_OT_LAYOUT_BASELINE_TAG_IDEO_EMBOX_BOTTOM_OR_LEFT = HB_TAG ('i','d','e','o'), 510 HB_OT_LAYOUT_BASELINE_TAG_IDEO_EMBOX_TOP_OR_RIGHT = HB_TAG ('i','d','t','p'), 511 HB_OT_LAYOUT_BASELINE_TAG_IDEO_EMBOX_CENTRAL = HB_TAG ('I','d','c','e'), 512 HB_OT_LAYOUT_BASELINE_TAG_MATH = HB_TAG ('m','a','t','h'), 513 514 /*< private >*/ 515 _HB_OT_LAYOUT_BASELINE_TAG_MAX_VALUE = HB_TAG_MAX_SIGNED /*< skip >*/ 516 } hb_ot_layout_baseline_tag_t; 517 518 HB_EXTERN hb_ot_layout_baseline_tag_t 519 hb_ot_layout_get_horizontal_baseline_tag_for_script (hb_script_t script); 520 521 HB_EXTERN hb_bool_t 522 hb_ot_layout_get_baseline (hb_font_t *font, 523 hb_ot_layout_baseline_tag_t baseline_tag, 524 hb_direction_t direction, 525 hb_tag_t script_tag, 526 hb_tag_t language_tag, 527 hb_position_t *coord /* OUT. May be NULL. */); 528 529 HB_EXTERN hb_bool_t 530 hb_ot_layout_get_baseline2 (hb_font_t *font, 531 hb_ot_layout_baseline_tag_t baseline_tag, 532 hb_direction_t direction, 533 hb_script_t script, 534 hb_language_t language, 535 hb_position_t *coord /* OUT. May be NULL. */); 536 537 HB_EXTERN void 538 hb_ot_layout_get_baseline_with_fallback (hb_font_t *font, 539 hb_ot_layout_baseline_tag_t baseline_tag, 540 hb_direction_t direction, 541 hb_tag_t script_tag, 542 hb_tag_t language_tag, 543 hb_position_t *coord /* OUT */); 544 545 HB_EXTERN void 546 hb_ot_layout_get_baseline_with_fallback2 (hb_font_t *font, 547 hb_ot_layout_baseline_tag_t baseline_tag, 548 hb_direction_t direction, 549 hb_script_t script, 550 hb_language_t language, 551 hb_position_t *coord /* OUT */); 552 553 HB_END_DECLS 554 555 #endif /* HB_OT_LAYOUT_H */