1/* 2 * Copyright © 2012,2013 Mozilla Foundation. 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 * Mozilla Author(s): Jonathan Kew 26 * Google Author(s): Behdad Esfahbod 27 */ 28 29#define HB_SHAPER coretext 30#define hb_coretext_shaper_face_data_t CGFont 31#include "hb-shaper-impl-private.hh" 32 33#include "hb-coretext.h" 34 35 36#ifndef HB_DEBUG_CORETEXT 37#define HB_DEBUG_CORETEXT (HB_DEBUG+0) 38#endif 39 40 41static void 42release_table_data (void *user_data) 43{ 44 CFDataRef cf_data = reinterpret_cast<CFDataRef> (user_data); 45 CFRelease(cf_data); 46} 47 48static hb_blob_t * 49reference_table (hb_face_t *face HB_UNUSED, hb_tag_t tag, void *user_data) 50{ 51 CGFontRef cg_font = reinterpret_cast<CGFontRef> (user_data); 52 CFDataRef cf_data = CGFontCopyTableForTag (cg_font, tag); 53 if (unlikely (!cf_data)) 54 return NULL; 55 56 const char *data = reinterpret_cast<const char*> (CFDataGetBytePtr (cf_data)); 57 const size_t length = CFDataGetLength (cf_data); 58 if (!data || !length) 59 return NULL; 60 61 return hb_blob_create (data, length, HB_MEMORY_MODE_READONLY, 62 reinterpret_cast<void *> (const_cast<__CFData *> (cf_data)), 63 release_table_data); 64} 65 66hb_face_t * 67hb_coretext_face_create (CGFontRef cg_font) 68{ 69 return hb_face_create_for_tables (reference_table, CGFontRetain (cg_font), (hb_destroy_func_t) CGFontRelease); 70} 71 72 73HB_SHAPER_DATA_ENSURE_DECLARE(coretext, face) 74HB_SHAPER_DATA_ENSURE_DECLARE(coretext, font) 75 76 77/* 78 * shaper face data 79 */ 80 81static void 82release_data (void *info, const void *data, size_t size) 83{ 84 assert (hb_blob_get_length ((hb_blob_t *) info) == size && 85 hb_blob_get_data ((hb_blob_t *) info, NULL) == data); 86 87 hb_blob_destroy ((hb_blob_t *) info); 88} 89 90hb_coretext_shaper_face_data_t * 91_hb_coretext_shaper_face_data_create (hb_face_t *face) 92{ 93 hb_coretext_shaper_face_data_t *data = NULL; 94 95 if (face->destroy == (hb_destroy_func_t) CGFontRelease) 96 { 97 data = CGFontRetain ((CGFontRef) face->user_data); 98 } 99 else 100 { 101 hb_blob_t *blob = hb_face_reference_blob (face); 102 unsigned int blob_length; 103 const char *blob_data = hb_blob_get_data (blob, &blob_length); 104 if (unlikely (!blob_length)) 105 DEBUG_MSG (CORETEXT, face, "Face has empty blob"); 106 107 CGDataProviderRef provider = CGDataProviderCreateWithData (blob, blob_data, blob_length, &release_data); 108 if (likely (provider)) 109 { 110 data = CGFontCreateWithDataProvider (provider); 111 CGDataProviderRelease (provider); 112 } 113 } 114 115 if (unlikely (!data)) { 116 DEBUG_MSG (CORETEXT, face, "Face CGFontCreateWithDataProvider() failed"); 117 } 118 119 return data; 120} 121 122void 123_hb_coretext_shaper_face_data_destroy (hb_coretext_shaper_face_data_t *data) 124{ 125 CFRelease (data); 126} 127 128CGFontRef 129hb_coretext_face_get_cg_font (hb_face_t *face) 130{ 131 if (unlikely (!hb_coretext_shaper_face_data_ensure (face))) return NULL; 132 hb_coretext_shaper_face_data_t *face_data = HB_SHAPER_DATA_GET (face); 133 return face_data; 134} 135 136 137/* 138 * shaper font data 139 */ 140 141struct hb_coretext_shaper_font_data_t { 142 CTFontRef ct_font; 143}; 144 145hb_coretext_shaper_font_data_t * 146_hb_coretext_shaper_font_data_create (hb_font_t *font) 147{ 148 if (unlikely (!hb_coretext_shaper_face_data_ensure (font->face))) return NULL; 149 150 hb_coretext_shaper_font_data_t *data = (hb_coretext_shaper_font_data_t *) calloc (1, sizeof (hb_coretext_shaper_font_data_t)); 151 if (unlikely (!data)) 152 return NULL; 153 154 hb_face_t *face = font->face; 155 hb_coretext_shaper_face_data_t *face_data = HB_SHAPER_DATA_GET (face); 156 157 data->ct_font = CTFontCreateWithGraphicsFont (face_data, font->y_scale, NULL, NULL); 158 if (unlikely (!data->ct_font)) { 159 DEBUG_MSG (CORETEXT, font, "Font CTFontCreateWithGraphicsFont() failed"); 160 free (data); 161 return NULL; 162 } 163 164 return data; 165} 166 167void 168_hb_coretext_shaper_font_data_destroy (hb_coretext_shaper_font_data_t *data) 169{ 170 CFRelease (data->ct_font); 171 free (data); 172} 173 174 175/* 176 * shaper shape_plan data 177 */ 178 179struct hb_coretext_shaper_shape_plan_data_t {}; 180 181hb_coretext_shaper_shape_plan_data_t * 182_hb_coretext_shaper_shape_plan_data_create (hb_shape_plan_t *shape_plan HB_UNUSED, 183 const hb_feature_t *user_features HB_UNUSED, 184 unsigned int num_user_features HB_UNUSED) 185{ 186 return (hb_coretext_shaper_shape_plan_data_t *) HB_SHAPER_DATA_SUCCEEDED; 187} 188 189void 190_hb_coretext_shaper_shape_plan_data_destroy (hb_coretext_shaper_shape_plan_data_t *data HB_UNUSED) 191{ 192} 193 194CTFontRef 195hb_coretext_font_get_ct_font (hb_font_t *font) 196{ 197 if (unlikely (!hb_coretext_shaper_font_data_ensure (font))) return NULL; 198 hb_coretext_shaper_font_data_t *font_data = HB_SHAPER_DATA_GET (font); 199 return font_data->ct_font; 200} 201 202 203/* 204 * shaper 205 */ 206 207struct feature_record_t { 208 unsigned int feature; 209 unsigned int setting; 210}; 211 212struct active_feature_t { 213 feature_record_t rec; 214 unsigned int order; 215 216 static int cmp (const active_feature_t *a, const active_feature_t *b) { 217 return a->rec.feature < b->rec.feature ? -1 : a->rec.feature > b->rec.feature ? 1 : 218 a->order < b->order ? -1 : a->order > b->order ? 1 : 219 a->rec.setting < b->rec.setting ? -1 : a->rec.setting > b->rec.setting ? 1 : 220 0; 221 } 222 bool operator== (const active_feature_t *f) { 223 return cmp (this, f) == 0; 224 } 225}; 226 227struct feature_event_t { 228 unsigned int index; 229 bool start; 230 active_feature_t feature; 231 232 static int cmp (const feature_event_t *a, const feature_event_t *b) { 233 return a->index < b->index ? -1 : a->index > b->index ? 1 : 234 a->start < b->start ? -1 : a->start > b->start ? 1 : 235 active_feature_t::cmp (&a->feature, &b->feature); 236 } 237}; 238 239struct range_record_t { 240 CTFontRef font; 241 unsigned int index_first; /* == start */ 242 unsigned int index_last; /* == end - 1 */ 243}; 244 245 246/* The following enum members are added in OS X 10.8. */ 247#define kAltHalfWidthTextSelector 6 248#define kAltProportionalTextSelector 5 249#define kAlternateHorizKanaOffSelector 1 250#define kAlternateHorizKanaOnSelector 0 251#define kAlternateKanaType 34 252#define kAlternateVertKanaOffSelector 3 253#define kAlternateVertKanaOnSelector 2 254#define kCaseSensitiveLayoutOffSelector 1 255#define kCaseSensitiveLayoutOnSelector 0 256#define kCaseSensitiveLayoutType 33 257#define kCaseSensitiveSpacingOffSelector 3 258#define kCaseSensitiveSpacingOnSelector 2 259#define kContextualAlternatesOffSelector 1 260#define kContextualAlternatesOnSelector 0 261#define kContextualAlternatesType 36 262#define kContextualLigaturesOffSelector 19 263#define kContextualLigaturesOnSelector 18 264#define kContextualSwashAlternatesOffSelector 5 265#define kContextualSwashAlternatesOnSelector 4 266#define kDefaultLowerCaseSelector 0 267#define kDefaultUpperCaseSelector 0 268#define kHistoricalLigaturesOffSelector 21 269#define kHistoricalLigaturesOnSelector 20 270#define kHojoCharactersSelector 12 271#define kJIS2004CharactersSelector 11 272#define kLowerCasePetiteCapsSelector 2 273#define kLowerCaseSmallCapsSelector 1 274#define kLowerCaseType 37 275#define kMathematicalGreekOffSelector 11 276#define kMathematicalGreekOnSelector 10 277#define kNLCCharactersSelector 13 278#define kQuarterWidthTextSelector 4 279#define kScientificInferiorsSelector 4 280#define kStylisticAltEightOffSelector 17 281#define kStylisticAltEightOnSelector 16 282#define kStylisticAltEighteenOffSelector 37 283#define kStylisticAltEighteenOnSelector 36 284#define kStylisticAltElevenOffSelector 23 285#define kStylisticAltElevenOnSelector 22 286#define kStylisticAltFifteenOffSelector 31 287#define kStylisticAltFifteenOnSelector 30 288#define kStylisticAltFiveOffSelector 11 289#define kStylisticAltFiveOnSelector 10 290#define kStylisticAltFourOffSelector 9 291#define kStylisticAltFourOnSelector 8 292#define kStylisticAltFourteenOffSelector 29 293#define kStylisticAltFourteenOnSelector 28 294#define kStylisticAltNineOffSelector 19 295#define kStylisticAltNineOnSelector 18 296#define kStylisticAltNineteenOffSelector 39 297#define kStylisticAltNineteenOnSelector 38 298#define kStylisticAltOneOffSelector 3 299#define kStylisticAltOneOnSelector 2 300#define kStylisticAltSevenOffSelector 15 301#define kStylisticAltSevenOnSelector 14 302#define kStylisticAltSeventeenOffSelector 35 303#define kStylisticAltSeventeenOnSelector 34 304#define kStylisticAltSixOffSelector 13 305#define kStylisticAltSixOnSelector 12 306#define kStylisticAltSixteenOffSelector 33 307#define kStylisticAltSixteenOnSelector 32 308#define kStylisticAltTenOffSelector 21 309#define kStylisticAltTenOnSelector 20 310#define kStylisticAltThirteenOffSelector 27 311#define kStylisticAltThirteenOnSelector 26 312#define kStylisticAltThreeOffSelector 7 313#define kStylisticAltThreeOnSelector 6 314#define kStylisticAltTwelveOffSelector 25 315#define kStylisticAltTwelveOnSelector 24 316#define kStylisticAltTwentyOffSelector 41 317#define kStylisticAltTwentyOnSelector 40 318#define kStylisticAltTwoOffSelector 5 319#define kStylisticAltTwoOnSelector 4 320#define kStylisticAlternativesType 35 321#define kSwashAlternatesOffSelector 3 322#define kSwashAlternatesOnSelector 2 323#define kThirdWidthTextSelector 3 324#define kTraditionalNamesCharactersSelector 14 325#define kUpperCasePetiteCapsSelector 2 326#define kUpperCaseSmallCapsSelector 1 327#define kUpperCaseType 38 328 329/* Table data courtesy of Apple. */ 330static const struct feature_mapping_t { 331 FourCharCode otFeatureTag; 332 uint16_t aatFeatureType; 333 uint16_t selectorToEnable; 334 uint16_t selectorToDisable; 335} feature_mappings[] = { 336 { 'c2pc', kUpperCaseType, kUpperCasePetiteCapsSelector, kDefaultUpperCaseSelector }, 337 { 'c2sc', kUpperCaseType, kUpperCaseSmallCapsSelector, kDefaultUpperCaseSelector }, 338 { 'calt', kContextualAlternatesType, kContextualAlternatesOnSelector, kContextualAlternatesOffSelector }, 339 { 'case', kCaseSensitiveLayoutType, kCaseSensitiveLayoutOnSelector, kCaseSensitiveLayoutOffSelector }, 340 { 'clig', kLigaturesType, kContextualLigaturesOnSelector, kContextualLigaturesOffSelector }, 341 { 'cpsp', kCaseSensitiveLayoutType, kCaseSensitiveSpacingOnSelector, kCaseSensitiveSpacingOffSelector }, 342 { 'cswh', kContextualAlternatesType, kContextualSwashAlternatesOnSelector, kContextualSwashAlternatesOffSelector }, 343 { 'dlig', kLigaturesType, kRareLigaturesOnSelector, kRareLigaturesOffSelector }, 344 { 'expt', kCharacterShapeType, kExpertCharactersSelector, 16 }, 345 { 'frac', kFractionsType, kDiagonalFractionsSelector, kNoFractionsSelector }, 346 { 'fwid', kTextSpacingType, kMonospacedTextSelector, 7 }, 347 { 'halt', kTextSpacingType, kAltHalfWidthTextSelector, 7 }, 348 { 'hist', kLigaturesType, kHistoricalLigaturesOnSelector, kHistoricalLigaturesOffSelector }, 349 { 'hkna', kAlternateKanaType, kAlternateHorizKanaOnSelector, kAlternateHorizKanaOffSelector, }, 350 { 'hlig', kLigaturesType, kHistoricalLigaturesOnSelector, kHistoricalLigaturesOffSelector }, 351 { 'hngl', kTransliterationType, kHanjaToHangulSelector, kNoTransliterationSelector }, 352 { 'hojo', kCharacterShapeType, kHojoCharactersSelector, 16 }, 353 { 'hwid', kTextSpacingType, kHalfWidthTextSelector, 7 }, 354 { 'ital', kItalicCJKRomanType, kCJKItalicRomanOnSelector, kCJKItalicRomanOffSelector }, 355 { 'jp04', kCharacterShapeType, kJIS2004CharactersSelector, 16 }, 356 { 'jp78', kCharacterShapeType, kJIS1978CharactersSelector, 16 }, 357 { 'jp83', kCharacterShapeType, kJIS1983CharactersSelector, 16 }, 358 { 'jp90', kCharacterShapeType, kJIS1990CharactersSelector, 16 }, 359 { 'liga', kLigaturesType, kCommonLigaturesOnSelector, kCommonLigaturesOffSelector }, 360 { 'lnum', kNumberCaseType, kUpperCaseNumbersSelector, 2 }, 361 { 'mgrk', kMathematicalExtrasType, kMathematicalGreekOnSelector, kMathematicalGreekOffSelector }, 362 { 'nlck', kCharacterShapeType, kNLCCharactersSelector, 16 }, 363 { 'onum', kNumberCaseType, kLowerCaseNumbersSelector, 2 }, 364 { 'ordn', kVerticalPositionType, kOrdinalsSelector, kNormalPositionSelector }, 365 { 'palt', kTextSpacingType, kAltProportionalTextSelector, 7 }, 366 { 'pcap', kLowerCaseType, kLowerCasePetiteCapsSelector, kDefaultLowerCaseSelector }, 367 { 'pkna', kTextSpacingType, kProportionalTextSelector, 7 }, 368 { 'pnum', kNumberSpacingType, kProportionalNumbersSelector, 4 }, 369 { 'pwid', kTextSpacingType, kProportionalTextSelector, 7 }, 370 { 'qwid', kTextSpacingType, kQuarterWidthTextSelector, 7 }, 371 { 'ruby', kRubyKanaType, kRubyKanaOnSelector, kRubyKanaOffSelector }, 372 { 'sinf', kVerticalPositionType, kScientificInferiorsSelector, kNormalPositionSelector }, 373 { 'smcp', kLowerCaseType, kLowerCaseSmallCapsSelector, kDefaultLowerCaseSelector }, 374 { 'smpl', kCharacterShapeType, kSimplifiedCharactersSelector, 16 }, 375 { 'ss01', kStylisticAlternativesType, kStylisticAltOneOnSelector, kStylisticAltOneOffSelector }, 376 { 'ss02', kStylisticAlternativesType, kStylisticAltTwoOnSelector, kStylisticAltTwoOffSelector }, 377 { 'ss03', kStylisticAlternativesType, kStylisticAltThreeOnSelector, kStylisticAltThreeOffSelector }, 378 { 'ss04', kStylisticAlternativesType, kStylisticAltFourOnSelector, kStylisticAltFourOffSelector }, 379 { 'ss05', kStylisticAlternativesType, kStylisticAltFiveOnSelector, kStylisticAltFiveOffSelector }, 380 { 'ss06', kStylisticAlternativesType, kStylisticAltSixOnSelector, kStylisticAltSixOffSelector }, 381 { 'ss07', kStylisticAlternativesType, kStylisticAltSevenOnSelector, kStylisticAltSevenOffSelector }, 382 { 'ss08', kStylisticAlternativesType, kStylisticAltEightOnSelector, kStylisticAltEightOffSelector }, 383 { 'ss09', kStylisticAlternativesType, kStylisticAltNineOnSelector, kStylisticAltNineOffSelector }, 384 { 'ss10', kStylisticAlternativesType, kStylisticAltTenOnSelector, kStylisticAltTenOffSelector }, 385 { 'ss11', kStylisticAlternativesType, kStylisticAltElevenOnSelector, kStylisticAltElevenOffSelector }, 386 { 'ss12', kStylisticAlternativesType, kStylisticAltTwelveOnSelector, kStylisticAltTwelveOffSelector }, 387 { 'ss13', kStylisticAlternativesType, kStylisticAltThirteenOnSelector, kStylisticAltThirteenOffSelector }, 388 { 'ss14', kStylisticAlternativesType, kStylisticAltFourteenOnSelector, kStylisticAltFourteenOffSelector }, 389 { 'ss15', kStylisticAlternativesType, kStylisticAltFifteenOnSelector, kStylisticAltFifteenOffSelector }, 390 { 'ss16', kStylisticAlternativesType, kStylisticAltSixteenOnSelector, kStylisticAltSixteenOffSelector }, 391 { 'ss17', kStylisticAlternativesType, kStylisticAltSeventeenOnSelector, kStylisticAltSeventeenOffSelector }, 392 { 'ss18', kStylisticAlternativesType, kStylisticAltEighteenOnSelector, kStylisticAltEighteenOffSelector }, 393 { 'ss19', kStylisticAlternativesType, kStylisticAltNineteenOnSelector, kStylisticAltNineteenOffSelector }, 394 { 'ss20', kStylisticAlternativesType, kStylisticAltTwentyOnSelector, kStylisticAltTwentyOffSelector }, 395 { 'subs', kVerticalPositionType, kInferiorsSelector, kNormalPositionSelector }, 396 { 'sups', kVerticalPositionType, kSuperiorsSelector, kNormalPositionSelector }, 397 { 'swsh', kContextualAlternatesType, kSwashAlternatesOnSelector, kSwashAlternatesOffSelector }, 398 { 'titl', kStyleOptionsType, kTitlingCapsSelector, kNoStyleOptionsSelector }, 399 { 'tnam', kCharacterShapeType, kTraditionalNamesCharactersSelector, 16 }, 400 { 'tnum', kNumberSpacingType, kMonospacedNumbersSelector, 4 }, 401 { 'trad', kCharacterShapeType, kTraditionalCharactersSelector, 16 }, 402 { 'twid', kTextSpacingType, kThirdWidthTextSelector, 7 }, 403 { 'unic', kLetterCaseType, 14, 15 }, 404 { 'valt', kTextSpacingType, kAltProportionalTextSelector, 7 }, 405 { 'vert', kVerticalSubstitutionType, kSubstituteVerticalFormsOnSelector, kSubstituteVerticalFormsOffSelector }, 406 { 'vhal', kTextSpacingType, kAltHalfWidthTextSelector, 7 }, 407 { 'vkna', kAlternateKanaType, kAlternateVertKanaOnSelector, kAlternateVertKanaOffSelector }, 408 { 'vpal', kTextSpacingType, kAltProportionalTextSelector, 7 }, 409 { 'vrt2', kVerticalSubstitutionType, kSubstituteVerticalFormsOnSelector, kSubstituteVerticalFormsOffSelector }, 410 { 'zero', kTypographicExtrasType, kSlashedZeroOnSelector, kSlashedZeroOffSelector }, 411}; 412 413static int 414_hb_feature_mapping_cmp (const void *key_, const void *entry_) 415{ 416 unsigned int key = * (unsigned int *) key_; 417 const feature_mapping_t * entry = (const feature_mapping_t *) entry_; 418 return key < entry->otFeatureTag ? -1 : 419 key > entry->otFeatureTag ? 1 : 420 0; 421} 422 423hb_bool_t 424_hb_coretext_shape (hb_shape_plan_t *shape_plan, 425 hb_font_t *font, 426 hb_buffer_t *buffer, 427 const hb_feature_t *features, 428 unsigned int num_features) 429{ 430 hb_face_t *face = font->face; 431 hb_coretext_shaper_face_data_t *face_data = HB_SHAPER_DATA_GET (face); 432 hb_coretext_shaper_font_data_t *font_data = HB_SHAPER_DATA_GET (font); 433 434 /* Attach marks to their bases, to match the 'ot' shaper. 435 * Adapted from hb-ot-shape:hb_form_clusters(). 436 * Note that this only makes us be closer to the 'ot' shaper, 437 * but by no means the same. For example, if there's 438 * B1 M1 B2 M2, and B1-B2 form a ligature, M2's cluster will 439 * continue pointing to B2 even though B2 was merged into B1's 440 * cluster... */ 441 { 442 hb_unicode_funcs_t *unicode = buffer->unicode; 443 unsigned int count = buffer->len; 444 hb_glyph_info_t *info = buffer->info; 445 for (unsigned int i = 1; i < count; i++) 446 if (HB_UNICODE_GENERAL_CATEGORY_IS_MARK (unicode->general_category (info[i].codepoint))) 447 buffer->merge_clusters (i - 1, i + 1); 448 } 449 450 hb_auto_array_t<feature_record_t> feature_records; 451 hb_auto_array_t<range_record_t> range_records; 452 453 /* 454 * Set up features. 455 * (copied + modified from code from hb-uniscribe.cc) 456 */ 457 if (num_features) 458 { 459 /* Sort features by start/end events. */ 460 hb_auto_array_t<feature_event_t> feature_events; 461 for (unsigned int i = 0; i < num_features; i++) 462 { 463 const feature_mapping_t * mapping = (const feature_mapping_t *) bsearch (&features[i].tag, 464 feature_mappings, 465 ARRAY_LENGTH (feature_mappings), 466 sizeof (feature_mappings[0]), 467 _hb_feature_mapping_cmp); 468 if (!mapping) 469 continue; 470 471 active_feature_t feature; 472 feature.rec.feature = mapping->aatFeatureType; 473 feature.rec.setting = features[i].value ? mapping->selectorToEnable : mapping->selectorToDisable; 474 feature.order = i; 475 476 feature_event_t *event; 477 478 event = feature_events.push (); 479 if (unlikely (!event)) 480 goto fail_features; 481 event->index = features[i].start; 482 event->start = true; 483 event->feature = feature; 484 485 event = feature_events.push (); 486 if (unlikely (!event)) 487 goto fail_features; 488 event->index = features[i].end; 489 event->start = false; 490 event->feature = feature; 491 } 492 feature_events.qsort (); 493 /* Add a strategic final event. */ 494 { 495 active_feature_t feature; 496 feature.rec.feature = HB_TAG_NONE; 497 feature.rec.setting = 0; 498 feature.order = num_features + 1; 499 500 feature_event_t *event = feature_events.push (); 501 if (unlikely (!event)) 502 goto fail_features; 503 event->index = 0; /* This value does magic. */ 504 event->start = false; 505 event->feature = feature; 506 } 507 508 /* Scan events and save features for each range. */ 509 hb_auto_array_t<active_feature_t> active_features; 510 unsigned int last_index = 0; 511 for (unsigned int i = 0; i < feature_events.len; i++) 512 { 513 feature_event_t *event = &feature_events[i]; 514 515 if (event->index != last_index) 516 { 517 /* Save a snapshot of active features and the range. */ 518 range_record_t *range = range_records.push (); 519 if (unlikely (!range)) 520 goto fail_features; 521 522 if (active_features.len) 523 { 524 CFMutableArrayRef features_array = CFArrayCreateMutable(kCFAllocatorDefault, 0, &kCFTypeArrayCallBacks); 525 526 /* TODO sort and resolve conflicting features? */ 527 /* active_features.qsort (); */ 528 for (unsigned int j = 0; j < active_features.len; j++) 529 { 530 CFStringRef keys[2] = { 531 kCTFontFeatureTypeIdentifierKey, 532 kCTFontFeatureSelectorIdentifierKey 533 }; 534 CFNumberRef values[2] = { 535 CFNumberCreate (kCFAllocatorDefault, kCFNumberIntType, &active_features[j].rec.feature), 536 CFNumberCreate (kCFAllocatorDefault, kCFNumberIntType, &active_features[j].rec.setting) 537 }; 538 CFDictionaryRef dict = CFDictionaryCreate (kCFAllocatorDefault, 539 (const void **) keys, 540 (const void **) values, 541 2, 542 &kCFTypeDictionaryKeyCallBacks, 543 &kCFTypeDictionaryValueCallBacks); 544 CFRelease (values[0]); 545 CFRelease (values[1]); 546 547 CFArrayAppendValue (features_array, dict); 548 CFRelease (dict); 549 550 } 551 552 CFDictionaryRef attributes = CFDictionaryCreate (kCFAllocatorDefault, 553 (const void **) &kCTFontFeatureSettingsAttribute, 554 (const void **) &features_array, 555 1, 556 &kCFTypeDictionaryKeyCallBacks, 557 &kCFTypeDictionaryValueCallBacks); 558 CFRelease (features_array); 559 560 CTFontDescriptorRef font_desc = CTFontDescriptorCreateWithAttributes (attributes); 561 CFRelease (attributes); 562 563 range->font = CTFontCreateCopyWithAttributes (font_data->ct_font, 0.0, NULL, font_desc); 564 CFRelease (font_desc); 565 } 566 else 567 { 568 range->font = NULL; 569 } 570 571 range->index_first = last_index; 572 range->index_last = event->index - 1; 573 574 last_index = event->index; 575 } 576 577 if (event->start) { 578 active_feature_t *feature = active_features.push (); 579 if (unlikely (!feature)) 580 goto fail_features; 581 *feature = event->feature; 582 } else { 583 active_feature_t *feature = active_features.find (&event->feature); 584 if (feature) 585 active_features.remove (feature - active_features.array); 586 } 587 } 588 589 if (!range_records.len) /* No active feature found. */ 590 goto fail_features; 591 } 592 else 593 { 594 fail_features: 595 num_features = 0; 596 } 597 598 unsigned int scratch_size; 599 hb_buffer_t::scratch_buffer_t *scratch = buffer->get_scratch_buffer (&scratch_size); 600 601#define ALLOCATE_ARRAY(Type, name, len, on_no_room) \ 602 Type *name = (Type *) scratch; \ 603 { \ 604 unsigned int _consumed = DIV_CEIL ((len) * sizeof (Type), sizeof (*scratch)); \ 605 if (unlikely (_consumed > scratch_size)) \ 606 { \ 607 on_no_room; \ 608 assert (0); \ 609 } \ 610 scratch += _consumed; \ 611 scratch_size -= _consumed; \ 612 } 613 614 ALLOCATE_ARRAY (UniChar, pchars, buffer->len * 2, /*nothing*/); 615 unsigned int chars_len = 0; 616 for (unsigned int i = 0; i < buffer->len; i++) { 617 hb_codepoint_t c = buffer->info[i].codepoint; 618 if (likely (c <= 0xFFFFu)) 619 pchars[chars_len++] = c; 620 else if (unlikely (c > 0x10FFFFu)) 621 pchars[chars_len++] = 0xFFFDu; 622 else { 623 pchars[chars_len++] = 0xD800u + ((c - 0x10000u) >> 10); 624 pchars[chars_len++] = 0xDC00u + ((c - 0x10000u) & ((1 << 10) - 1)); 625 } 626 } 627 628 ALLOCATE_ARRAY (unsigned int, log_clusters, chars_len, /*nothing*/); 629 chars_len = 0; 630 for (unsigned int i = 0; i < buffer->len; i++) 631 { 632 hb_codepoint_t c = buffer->info[i].codepoint; 633 unsigned int cluster = buffer->info[i].cluster; 634 log_clusters[chars_len++] = cluster; 635 if (hb_in_range (c, 0x10000u, 0x10FFFFu)) 636 log_clusters[chars_len++] = cluster; /* Surrogates. */ 637 } 638 639#define FAIL(...) \ 640 HB_STMT_START { \ 641 DEBUG_MSG (CORETEXT, NULL, __VA_ARGS__); \ 642 ret = false; \ 643 goto fail; \ 644 } HB_STMT_END; 645 646 bool ret = true; 647 CFStringRef string_ref = NULL; 648 CTLineRef line = NULL; 649 650 if (0) 651 { 652resize_and_retry: 653 DEBUG_MSG (CORETEXT, buffer, "Buffer resize"); 654 /* string_ref uses the scratch-buffer for backing store, and line references 655 * string_ref (via attr_string). We must release those before resizing buffer. */ 656 assert (string_ref); 657 assert (line); 658 CFRelease (string_ref); 659 CFRelease (line); 660 string_ref = NULL; 661 line = NULL; 662 663 /* Get previous start-of-scratch-area, that we use later for readjusting 664 * our existing scratch arrays. */ 665 unsigned int old_scratch_used; 666 hb_buffer_t::scratch_buffer_t *old_scratch; 667 old_scratch = buffer->get_scratch_buffer (&old_scratch_used); 668 old_scratch_used = scratch - old_scratch; 669 670 if (unlikely (!buffer->ensure (buffer->allocated * 2))) 671 FAIL ("Buffer resize failed"); 672 673 /* Adjust scratch, pchars, and log_cluster arrays. This is ugly, but really the 674 * cleanest way to do without completely restructuring the rest of this shaper. */ 675 scratch = buffer->get_scratch_buffer (&scratch_size); 676 pchars = reinterpret_cast<UniChar *> (((char *) scratch + ((char *) pchars - (char *) old_scratch))); 677 log_clusters = reinterpret_cast<unsigned int *> (((char *) scratch + ((char *) log_clusters - (char *) old_scratch))); 678 scratch += old_scratch_used; 679 scratch_size -= old_scratch_used; 680 } 681retry: 682 { 683 string_ref = CFStringCreateWithCharactersNoCopy (NULL, 684 pchars, chars_len, 685 kCFAllocatorNull); 686 if (unlikely (!string_ref)) 687 FAIL ("CFStringCreateWithCharactersNoCopy failed"); 688 689 /* Create an attributed string, populate it, and create a line from it, then release attributed string. */ 690 { 691 CFMutableAttributedStringRef attr_string = CFAttributedStringCreateMutable (kCFAllocatorDefault, 692 chars_len); 693 if (unlikely (!attr_string)) 694 FAIL ("CFAttributedStringCreateMutable failed"); 695 CFAttributedStringReplaceString (attr_string, CFRangeMake (0, 0), string_ref); 696 if (HB_DIRECTION_IS_VERTICAL (buffer->props.direction)) 697 { 698 CFAttributedStringSetAttribute (attr_string, CFRangeMake (0, chars_len), 699 kCTVerticalFormsAttributeName, kCFBooleanTrue); 700 } 701 702 if (buffer->props.language) 703 { 704/* What's the iOS equivalent of this check? 705 * The symbols was introduced in iOS 7.0. 706 * At any rate, our fallback is safe and works fine. */ 707#if MAC_OS_X_VERSION_MIN_REQUIRED < 1090 708# define kCTLanguageAttributeName CFSTR ("NSLanguage") 709#endif 710 CFStringRef lang = CFStringCreateWithCStringNoCopy (kCFAllocatorDefault, 711 hb_language_to_string (buffer->props.language), 712 kCFStringEncodingUTF8, 713 kCFAllocatorNull); 714 if (unlikely (!lang)) 715 FAIL ("CFStringCreateWithCStringNoCopy failed"); 716 CFAttributedStringSetAttribute (attr_string, CFRangeMake (0, chars_len), 717 kCTLanguageAttributeName, lang); 718 CFRelease (lang); 719 } 720 CFAttributedStringSetAttribute (attr_string, CFRangeMake (0, chars_len), 721 kCTFontAttributeName, font_data->ct_font); 722 723 if (num_features) 724 { 725 unsigned int start = 0; 726 range_record_t *last_range = &range_records[0]; 727 for (unsigned int k = 0; k < chars_len; k++) 728 { 729 range_record_t *range = last_range; 730 while (log_clusters[k] < range->index_first) 731 range--; 732 while (log_clusters[k] > range->index_last) 733 range++; 734 if (range != last_range) 735 { 736 if (last_range->font) 737 CFAttributedStringSetAttribute (attr_string, CFRangeMake (start, k - start), 738 kCTFontAttributeName, last_range->font); 739 740 start = k; 741 } 742 743 last_range = range; 744 } 745 if (start != chars_len && last_range->font) 746 CFAttributedStringSetAttribute (attr_string, CFRangeMake (start, chars_len - start), 747 kCTFontAttributeName, last_range->font); 748 } 749 750 int level = HB_DIRECTION_IS_FORWARD (buffer->props.direction) ? 0 : 1; 751 CFNumberRef level_number = CFNumberCreate (kCFAllocatorDefault, kCFNumberIntType, &level); 752 CFDictionaryRef options = CFDictionaryCreate (kCFAllocatorDefault, 753 (const void **) &kCTTypesetterOptionForcedEmbeddingLevel, 754 (const void **) &level_number, 755 1, 756 &kCFTypeDictionaryKeyCallBacks, 757 &kCFTypeDictionaryValueCallBacks); 758 if (unlikely (!options)) 759 FAIL ("CFDictionaryCreate failed"); 760 761 CTTypesetterRef typesetter = CTTypesetterCreateWithAttributedStringAndOptions (attr_string, options); 762 CFRelease (options); 763 CFRelease (attr_string); 764 if (unlikely (!typesetter)) 765 FAIL ("CTTypesetterCreateWithAttributedStringAndOptions failed"); 766 767 line = CTTypesetterCreateLine (typesetter, CFRangeMake(0, 0)); 768 CFRelease (typesetter); 769 if (unlikely (!line)) 770 FAIL ("CTTypesetterCreateLine failed"); 771 } 772 773 CFArrayRef glyph_runs = CTLineGetGlyphRuns (line); 774 unsigned int num_runs = CFArrayGetCount (glyph_runs); 775 DEBUG_MSG (CORETEXT, NULL, "Num runs: %d", num_runs); 776 777 buffer->len = 0; 778 uint32_t status_and = ~0, status_or = 0; 779 780 const CFRange range_all = CFRangeMake (0, 0); 781 782 for (unsigned int i = 0; i < num_runs; i++) 783 { 784 CTRunRef run = static_cast<CTRunRef>(CFArrayGetValueAtIndex (glyph_runs, i)); 785 CTRunStatus run_status = CTRunGetStatus (run); 786 status_or |= run_status; 787 status_and &= run_status; 788 DEBUG_MSG (CORETEXT, run, "CTRunStatus: %x", run_status); 789 790 /* CoreText does automatic font fallback (AKA "cascading") for characters 791 * not supported by the requested font, and provides no way to turn it off, 792 * so we must detect if the returned run uses a font other than the requested 793 * one and fill in the buffer with .notdef glyphs instead of random glyph 794 * indices from a different font. 795 */ 796 CFDictionaryRef attributes = CTRunGetAttributes (run); 797 CTFontRef run_ct_font = static_cast<CTFontRef>(CFDictionaryGetValue (attributes, kCTFontAttributeName)); 798 if (!CFEqual (run_ct_font, font_data->ct_font)) 799 { 800 /* The run doesn't use our main font instance. We have to figure out 801 * whether font fallback happened, or this is just CoreText giving us 802 * another CTFont using the same underlying CGFont. CoreText seems 803 * to do that in a variety of situations, one of which being vertical 804 * text, but also perhaps for caching reasons. 805 * 806 * First, see if it uses any of our subfonts created to set font features... 807 * 808 * Next, compare the CGFont to the one we used to create our fonts. 809 * Even this doesn't work all the time. 810 * 811 * Finally, we compare PS names, which I don't think are unique... 812 * 813 * Looks like if we really want to be sure here we have to modify the 814 * font to change the name table, similar to what we do in the uniscribe 815 * backend. 816 * 817 * However, even that wouldn't work if we were passed in the CGFont to 818 * begin with. 819 * 820 * Webkit uses a slightly different approach: it installs LastResort 821 * as fallback chain, and then checks PS name of used font against 822 * LastResort. That one is safe for any font except for LastResort, 823 * as opposed to ours, which can fail if we are using any uninstalled 824 * font that has the same name as an installed font. 825 * 826 * See: http://github.com/behdad/harfbuzz/pull/36 827 */ 828 bool matched = false; 829 for (unsigned int i = 0; i < range_records.len; i++) 830 if (range_records[i].font && CFEqual (run_ct_font, range_records[i].font)) 831 { 832 matched = true; 833 break; 834 } 835 if (!matched) 836 { 837 CGFontRef run_cg_font = CTFontCopyGraphicsFont (run_ct_font, 0); 838 if (run_cg_font) 839 { 840 matched = CFEqual (run_cg_font, face_data); 841 CFRelease (run_cg_font); 842 } 843 } 844 if (!matched) 845 { 846 CFStringRef font_ps_name = CTFontCopyName (font_data->ct_font, kCTFontPostScriptNameKey); 847 CFStringRef run_ps_name = CTFontCopyName (run_ct_font, kCTFontPostScriptNameKey); 848 CFComparisonResult result = CFStringCompare (run_ps_name, font_ps_name, 0); 849 CFRelease (run_ps_name); 850 CFRelease (font_ps_name); 851 if (result == kCFCompareEqualTo) 852 matched = true; 853 } 854 if (!matched) 855 { 856 CFRange range = CTRunGetStringRange (run); 857 DEBUG_MSG (CORETEXT, run, "Run used fallback font: %ld..%ld", 858 range.location, range.location + range.length); 859 if (!buffer->ensure_inplace (buffer->len + range.length)) 860 goto resize_and_retry; 861 hb_glyph_info_t *info = buffer->info + buffer->len; 862 863 CGGlyph notdef = 0; 864 double advance = CTFontGetAdvancesForGlyphs (font_data->ct_font, kCTFontHorizontalOrientation, ¬def, NULL, 1); 865 866 unsigned int old_len = buffer->len; 867 for (CFIndex j = range.location; j < range.location + range.length; j++) 868 { 869 UniChar ch = CFStringGetCharacterAtIndex (string_ref, j); 870 if (hb_in_range<UniChar> (ch, 0xDC00u, 0xDFFFu) && range.location < j) 871 { 872 ch = CFStringGetCharacterAtIndex (string_ref, j - 1); 873 if (hb_in_range<UniChar> (ch, 0xD800u, 0xDBFFu)) 874 /* This is the second of a surrogate pair. Don't need .notdef 875 * for this one. */ 876 continue; 877 } 878 879 info->codepoint = notdef; 880 info->cluster = log_clusters[j]; 881 882 info->mask = advance; 883 info->var1.u32 = 0; 884 info->var2.u32 = 0; 885 886 info++; 887 buffer->len++; 888 } 889 if (HB_DIRECTION_IS_BACKWARD (buffer->props.direction)) 890 buffer->reverse_range (old_len, buffer->len); 891 continue; 892 } 893 } 894 895 unsigned int num_glyphs = CTRunGetGlyphCount (run); 896 if (num_glyphs == 0) 897 continue; 898 899 if (!buffer->ensure_inplace (buffer->len + num_glyphs)) 900 goto resize_and_retry; 901 902 hb_glyph_info_t *run_info = buffer->info + buffer->len; 903 904 /* Testing used to indicate that CTRunGetGlyphsPtr, etc (almost?) always 905 * succeed, and so copying data to our own buffer will be rare. Reports 906 * have it that this changed in OS X 10.10 Yosemite, and NULL is returned 907 * frequently. At any rate, we can test that codepath by setting USE_PTR 908 * to false. */ 909 910#define USE_PTR true 911 912#define SCRATCH_SAVE() \ 913 unsigned int scratch_size_saved = scratch_size; \ 914 hb_buffer_t::scratch_buffer_t *scratch_saved = scratch 915 916#define SCRATCH_RESTORE() \ 917 scratch_size = scratch_size_saved; \ 918 scratch = scratch_saved; 919 920 { 921 SCRATCH_SAVE(); 922 const CGGlyph* glyphs = USE_PTR ? CTRunGetGlyphsPtr (run) : NULL; 923 if (!glyphs) { 924 ALLOCATE_ARRAY (CGGlyph, glyph_buf, num_glyphs, goto resize_and_retry); 925 CTRunGetGlyphs (run, range_all, glyph_buf); 926 glyphs = glyph_buf; 927 } 928 const CFIndex* string_indices = USE_PTR ? CTRunGetStringIndicesPtr (run) : NULL; 929 if (!string_indices) { 930 ALLOCATE_ARRAY (CFIndex, index_buf, num_glyphs, goto resize_and_retry); 931 CTRunGetStringIndices (run, range_all, index_buf); 932 string_indices = index_buf; 933 } 934 hb_glyph_info_t *info = run_info; 935 for (unsigned int j = 0; j < num_glyphs; j++) 936 { 937 info->codepoint = glyphs[j]; 938 info->cluster = log_clusters[string_indices[j]]; 939 info++; 940 } 941 SCRATCH_RESTORE(); 942 } 943 { 944 SCRATCH_SAVE(); 945 const CGPoint* positions = USE_PTR ? CTRunGetPositionsPtr (run) : NULL; 946 if (!positions) { 947 ALLOCATE_ARRAY (CGPoint, position_buf, num_glyphs, goto resize_and_retry); 948 CTRunGetPositions (run, range_all, position_buf); 949 positions = position_buf; 950 } 951 double run_advance = CTRunGetTypographicBounds (run, range_all, NULL, NULL, NULL); 952 DEBUG_MSG (CORETEXT, run, "Run advance: %g", run_advance); 953 hb_glyph_info_t *info = run_info; 954 if (HB_DIRECTION_IS_HORIZONTAL (buffer->props.direction)) 955 { 956 for (unsigned int j = 0; j < num_glyphs; j++) 957 { 958 double advance = (j + 1 < num_glyphs ? positions[j + 1].x : positions[0].x + run_advance) - positions[j].x; 959 info->mask = advance; 960 info->var1.u32 = positions[0].x; /* Yes, zero. */ 961 info->var2.u32 = positions[j].y; 962 info++; 963 } 964 } 965 else 966 { 967 run_advance = -run_advance; 968 for (unsigned int j = 0; j < num_glyphs; j++) 969 { 970 double advance = (j + 1 < num_glyphs ? positions[j + 1].y : positions[0].y + run_advance) - positions[j].y; 971 info->mask = advance; 972 info->var1.u32 = positions[j].x; 973 info->var2.u32 = positions[0].y; /* Yes, zero. */ 974 info++; 975 } 976 } 977 SCRATCH_RESTORE(); 978 } 979#undef SCRATCH_RESTORE 980#undef SCRATCH_SAVE 981#undef USE_PTR 982#undef ALLOCATE_ARRAY 983 984 buffer->len += num_glyphs; 985 } 986 987 /* Make sure all runs had the expected direction. */ 988 bool backward = HB_DIRECTION_IS_BACKWARD (buffer->props.direction); 989 assert (bool (status_and & kCTRunStatusRightToLeft) == backward); 990 assert (bool (status_or & kCTRunStatusRightToLeft) == backward); 991 992 buffer->clear_positions (); 993 994 unsigned int count = buffer->len; 995 hb_glyph_info_t *info = buffer->info; 996 hb_glyph_position_t *pos = buffer->pos; 997 if (HB_DIRECTION_IS_HORIZONTAL (buffer->props.direction)) 998 for (unsigned int i = 0; i < count; i++) 999 { 1000 pos->x_advance = info->mask; 1001 pos->x_offset = info->var1.u32; 1002 pos->y_offset = info->var2.u32; 1003 info++, pos++; 1004 } 1005 else 1006 for (unsigned int i = 0; i < count; i++) 1007 { 1008 pos->y_advance = info->mask; 1009 pos->x_offset = info->var1.u32; 1010 pos->y_offset = info->var2.u32; 1011 info++, pos++; 1012 } 1013 1014 /* Fix up clusters so that we never return out-of-order indices; 1015 * if core text has reordered glyphs, we'll merge them to the 1016 * beginning of the reordered cluster. CoreText is nice enough 1017 * to tell us whenever it has produced nonmonotonic results... 1018 * Note that we assume the input clusters were nonmonotonic to 1019 * begin with. 1020 * 1021 * This does *not* mean we'll form the same clusters as Uniscribe 1022 * or the native OT backend, only that the cluster indices will be 1023 * monotonic in the output buffer. */ 1024 if (count > 1 && (status_or & kCTRunStatusNonMonotonic)) 1025 { 1026 hb_glyph_info_t *info = buffer->info; 1027 if (HB_DIRECTION_IS_FORWARD (buffer->props.direction)) 1028 { 1029 unsigned int cluster = info[count - 1].cluster; 1030 for (unsigned int i = count - 1; i > 0; i--) 1031 { 1032 cluster = MIN (cluster, info[i - 1].cluster); 1033 info[i - 1].cluster = cluster; 1034 } 1035 } 1036 else 1037 { 1038 unsigned int cluster = info[0].cluster; 1039 for (unsigned int i = 1; i < count; i++) 1040 { 1041 cluster = MIN (cluster, info[i].cluster); 1042 info[i].cluster = cluster; 1043 } 1044 } 1045 } 1046 } 1047 1048#undef FAIL 1049 1050fail: 1051 if (string_ref) 1052 CFRelease (string_ref); 1053 if (line) 1054 CFRelease (line); 1055 1056 for (unsigned int i = 0; i < range_records.len; i++) 1057 if (range_records[i].font) 1058 CFRelease (range_records[i].font); 1059 1060 return ret; 1061} 1062 1063 1064/* 1065 * AAT shaper 1066 */ 1067 1068HB_SHAPER_DATA_ENSURE_DECLARE(coretext_aat, face) 1069HB_SHAPER_DATA_ENSURE_DECLARE(coretext_aat, font) 1070 1071 1072/* 1073 * shaper face data 1074 */ 1075 1076struct hb_coretext_aat_shaper_face_data_t {}; 1077 1078hb_coretext_aat_shaper_face_data_t * 1079_hb_coretext_aat_shaper_face_data_create (hb_face_t *face) 1080{ 1081 hb_blob_t *mort_blob = face->reference_table (HB_CORETEXT_TAG_MORT); 1082 /* Umm, we just reference the table to check whether it exists. 1083 * Maybe add better API for this? */ 1084 if (!hb_blob_get_length (mort_blob)) 1085 { 1086 hb_blob_destroy (mort_blob); 1087 mort_blob = face->reference_table (HB_CORETEXT_TAG_MORX); 1088 if (!hb_blob_get_length (mort_blob)) 1089 { 1090 hb_blob_destroy (mort_blob); 1091 return NULL; 1092 } 1093 } 1094 hb_blob_destroy (mort_blob); 1095 1096 return hb_coretext_shaper_face_data_ensure (face) ? (hb_coretext_aat_shaper_face_data_t *) HB_SHAPER_DATA_SUCCEEDED : NULL; 1097} 1098 1099void 1100_hb_coretext_aat_shaper_face_data_destroy (hb_coretext_aat_shaper_face_data_t *data HB_UNUSED) 1101{ 1102} 1103 1104 1105/* 1106 * shaper font data 1107 */ 1108 1109struct hb_coretext_aat_shaper_font_data_t {}; 1110 1111hb_coretext_aat_shaper_font_data_t * 1112_hb_coretext_aat_shaper_font_data_create (hb_font_t *font) 1113{ 1114 return hb_coretext_shaper_font_data_ensure (font) ? (hb_coretext_aat_shaper_font_data_t *) HB_SHAPER_DATA_SUCCEEDED : NULL; 1115} 1116 1117void 1118_hb_coretext_aat_shaper_font_data_destroy (hb_coretext_aat_shaper_font_data_t *data HB_UNUSED) 1119{ 1120} 1121 1122 1123/* 1124 * shaper shape_plan data 1125 */ 1126 1127struct hb_coretext_aat_shaper_shape_plan_data_t {}; 1128 1129hb_coretext_aat_shaper_shape_plan_data_t * 1130_hb_coretext_aat_shaper_shape_plan_data_create (hb_shape_plan_t *shape_plan HB_UNUSED, 1131 const hb_feature_t *user_features HB_UNUSED, 1132 unsigned int num_user_features HB_UNUSED) 1133{ 1134 return (hb_coretext_aat_shaper_shape_plan_data_t *) HB_SHAPER_DATA_SUCCEEDED; 1135} 1136 1137void 1138_hb_coretext_aat_shaper_shape_plan_data_destroy (hb_coretext_aat_shaper_shape_plan_data_t *data HB_UNUSED) 1139{ 1140} 1141 1142 1143/* 1144 * shaper 1145 */ 1146 1147hb_bool_t 1148_hb_coretext_aat_shape (hb_shape_plan_t *shape_plan, 1149 hb_font_t *font, 1150 hb_buffer_t *buffer, 1151 const hb_feature_t *features, 1152 unsigned int num_features) 1153{ 1154 return _hb_coretext_shape (shape_plan, font, buffer, features, num_features); 1155} 1156