1 /* 2 * Copyright (C) 1998-2004 David Turner and Werner Lemberg 3 * Copyright (C) 2006 Behdad Esfahbod 4 * 5 * This is part of HarfBuzz, an OpenType Layout engine 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 26 #ifndef HARFBUZZ_GPOS_PRIVATE_H 27 #define HARFBUZZ_GPOS_PRIVATE_H 28 29 #include "harfbuzz-impl.h" 30 #include "harfbuzz-stream-private.h" 31 #include "harfbuzz-gpos.h" 32 33 HB_BEGIN_HEADER 34 35 36 /* shared tables */ 37 38 struct HB_ValueRecord_ 39 { 40 HB_Short XPlacement; /* horizontal adjustment for 41 placement */ 42 HB_Short YPlacement; /* vertical adjustment for 43 placement */ 44 HB_Short XAdvance; /* horizontal adjustment for 45 advance */ 46 HB_Short YAdvance; /* vertical adjustment for 47 advance */ 48 HB_Device XPlacementDevice; /* device table for horizontal 49 placement */ 50 HB_Device YPlacementDevice; /* device table for vertical 51 placement */ 52 HB_Device XAdvanceDevice; /* device table for horizontal 53 advance */ 54 HB_Device YAdvanceDevice; /* device table for vertical 55 advance */ 56 HB_UShort XIdPlacement; /* horizontal placement metric ID */ 57 HB_UShort YIdPlacement; /* vertical placement metric ID */ 58 HB_UShort XIdAdvance; /* horizontal advance metric ID */ 59 HB_UShort YIdAdvance; /* vertical advance metric ID */ 60 }; 61 62 typedef struct HB_ValueRecord_ HB_ValueRecord; 63 64 65 /* Mask values to scan the value format of the ValueRecord structure. 66 We always expand compressed ValueRecords of the font. */ 67 68 #define HB_GPOS_FORMAT_HAVE_X_PLACEMENT 0x0001 69 #define HB_GPOS_FORMAT_HAVE_Y_PLACEMENT 0x0002 70 #define HB_GPOS_FORMAT_HAVE_X_ADVANCE 0x0004 71 #define HB_GPOS_FORMAT_HAVE_Y_ADVANCE 0x0008 72 #define HB_GPOS_FORMAT_HAVE_X_PLACEMENT_DEVICE 0x0010 73 #define HB_GPOS_FORMAT_HAVE_Y_PLACEMENT_DEVICE 0x0020 74 #define HB_GPOS_FORMAT_HAVE_X_ADVANCE_DEVICE 0x0040 75 #define HB_GPOS_FORMAT_HAVE_Y_ADVANCE_DEVICE 0x0080 76 #define HB_GPOS_FORMAT_HAVE_X_ID_PLACEMENT 0x0100 77 #define HB_GPOS_FORMAT_HAVE_Y_ID_PLACEMENT 0x0200 78 #define HB_GPOS_FORMAT_HAVE_X_ID_ADVANCE 0x0400 79 #define HB_GPOS_FORMAT_HAVE_Y_ID_ADVANCE 0x0800 80 81 82 struct HB_AnchorFormat1_ 83 { 84 HB_Short XCoordinate; /* horizontal value */ 85 HB_Short YCoordinate; /* vertical value */ 86 }; 87 88 typedef struct HB_AnchorFormat1_ HB_AnchorFormat1; 89 90 91 struct HB_AnchorFormat2_ 92 { 93 HB_Short XCoordinate; /* horizontal value */ 94 HB_Short YCoordinate; /* vertical value */ 95 HB_UShort AnchorPoint; /* index to glyph contour point */ 96 }; 97 98 typedef struct HB_AnchorFormat2_ HB_AnchorFormat2; 99 100 101 struct HB_AnchorFormat3_ 102 { 103 HB_Short XCoordinate; /* horizontal value */ 104 HB_Short YCoordinate; /* vertical value */ 105 HB_Device XDeviceTable; /* device table for X coordinate */ 106 HB_Device YDeviceTable; /* device table for Y coordinate */ 107 }; 108 109 typedef struct HB_AnchorFormat3_ HB_AnchorFormat3; 110 111 112 struct HB_AnchorFormat4_ 113 { 114 HB_UShort XIdAnchor; /* horizontal metric ID */ 115 HB_UShort YIdAnchor; /* vertical metric ID */ 116 }; 117 118 typedef struct HB_AnchorFormat4_ HB_AnchorFormat4; 119 120 121 struct HB_Anchor_ 122 { 123 HB_UShort PosFormat; /* 1, 2, 3, or 4 -- 0 indicates 124 that there is no Anchor table */ 125 126 union 127 { 128 HB_AnchorFormat1 af1; 129 HB_AnchorFormat2 af2; 130 HB_AnchorFormat3 af3; 131 HB_AnchorFormat4 af4; 132 } af; 133 }; 134 135 typedef struct HB_Anchor_ HB_Anchor; 136 137 138 struct HB_MarkRecord_ 139 { 140 HB_UShort Class; /* mark class */ 141 HB_Anchor MarkAnchor; /* anchor table */ 142 }; 143 144 typedef struct HB_MarkRecord_ HB_MarkRecord; 145 146 147 struct HB_MarkArray_ 148 { 149 HB_UShort MarkCount; /* number of MarkRecord tables */ 150 HB_MarkRecord* MarkRecord; /* array of MarkRecord tables */ 151 }; 152 153 typedef struct HB_MarkArray_ HB_MarkArray; 154 155 156 /* LookupType 1 */ 157 158 struct HB_SinglePosFormat1_ 159 { 160 HB_ValueRecord Value; /* ValueRecord for all covered 161 glyphs */ 162 }; 163 164 typedef struct HB_SinglePosFormat1_ HB_SinglePosFormat1; 165 166 167 struct HB_SinglePosFormat2_ 168 { 169 HB_UShort ValueCount; /* number of ValueRecord tables */ 170 HB_ValueRecord* Value; /* array of ValueRecord tables */ 171 }; 172 173 typedef struct HB_SinglePosFormat2_ HB_SinglePosFormat2; 174 175 176 struct HB_SinglePos_ 177 { 178 HB_UShort PosFormat; /* 1 or 2 */ 179 HB_Coverage Coverage; /* Coverage table */ 180 181 HB_UShort ValueFormat; /* format of ValueRecord table */ 182 183 union 184 { 185 HB_SinglePosFormat1 spf1; 186 HB_SinglePosFormat2 spf2; 187 } spf; 188 }; 189 190 typedef struct HB_SinglePos_ HB_SinglePos; 191 192 193 /* LookupType 2 */ 194 195 struct HB_PairValueRecord_ 196 { 197 HB_UShort SecondGlyph; /* glyph ID for second glyph */ 198 HB_ValueRecord Value1; /* pos. data for first glyph */ 199 HB_ValueRecord Value2; /* pos. data for second glyph */ 200 }; 201 202 typedef struct HB_PairValueRecord_ HB_PairValueRecord; 203 204 205 struct HB_PairSet_ 206 { 207 HB_UShort PairValueCount; 208 /* number of PairValueRecord tables */ 209 HB_PairValueRecord* PairValueRecord; 210 /* array of PairValueRecord tables */ 211 }; 212 213 typedef struct HB_PairSet_ HB_PairSet; 214 215 216 struct HB_PairPosFormat1_ 217 { 218 HB_UShort PairSetCount; /* number of PairSet tables */ 219 HB_PairSet* PairSet; /* array of PairSet tables */ 220 }; 221 222 typedef struct HB_PairPosFormat1_ HB_PairPosFormat1; 223 224 225 struct HB_Class2Record_ 226 { 227 HB_ValueRecord Value1; /* pos. data for first glyph */ 228 HB_ValueRecord Value2; /* pos. data for second glyph */ 229 }; 230 231 typedef struct HB_Class2Record_ HB_Class2Record; 232 233 234 struct HB_Class1Record_ 235 { 236 HB_Class2Record* Class2Record; /* array of Class2Record tables */ 237 }; 238 239 typedef struct HB_Class1Record_ HB_Class1Record; 240 241 242 struct HB_PairPosFormat2_ 243 { 244 HB_ClassDefinition ClassDef1; /* class def. for first glyph */ 245 HB_ClassDefinition ClassDef2; /* class def. for second glyph */ 246 HB_UShort Class1Count; /* number of classes in ClassDef1 247 table */ 248 HB_UShort Class2Count; /* number of classes in ClassDef2 249 table */ 250 HB_Class1Record* Class1Record; /* array of Class1Record tables */ 251 }; 252 253 typedef struct HB_PairPosFormat2_ HB_PairPosFormat2; 254 255 256 struct HB_PairPos_ 257 { 258 HB_UShort PosFormat; /* 1 or 2 */ 259 HB_Coverage Coverage; /* Coverage table */ 260 HB_UShort ValueFormat1; /* format of ValueRecord table 261 for first glyph */ 262 HB_UShort ValueFormat2; /* format of ValueRecord table 263 for second glyph */ 264 265 union 266 { 267 HB_PairPosFormat1 ppf1; 268 HB_PairPosFormat2 ppf2; 269 } ppf; 270 }; 271 272 typedef struct HB_PairPos_ HB_PairPos; 273 274 275 /* LookupType 3 */ 276 277 struct HB_EntryExitRecord_ 278 { 279 HB_Anchor EntryAnchor; /* entry Anchor table */ 280 HB_Anchor ExitAnchor; /* exit Anchor table */ 281 }; 282 283 284 typedef struct HB_EntryExitRecord_ HB_EntryExitRecord; 285 286 struct HB_CursivePos_ 287 { 288 HB_UShort PosFormat; /* always 1 */ 289 HB_Coverage Coverage; /* Coverage table */ 290 HB_UShort EntryExitCount; 291 /* number of EntryExitRecord tables */ 292 HB_EntryExitRecord* EntryExitRecord; 293 /* array of EntryExitRecord tables */ 294 }; 295 296 typedef struct HB_CursivePos_ HB_CursivePos; 297 298 299 /* LookupType 4 */ 300 301 struct HB_BaseRecord_ 302 { 303 HB_Anchor* BaseAnchor; /* array of base glyph anchor 304 tables */ 305 }; 306 307 typedef struct HB_BaseRecord_ HB_BaseRecord; 308 309 310 struct HB_BaseArray_ 311 { 312 HB_UShort BaseCount; /* number of BaseRecord tables */ 313 HB_BaseRecord* BaseRecord; /* array of BaseRecord tables */ 314 }; 315 316 typedef struct HB_BaseArray_ HB_BaseArray; 317 318 319 struct HB_MarkBasePos_ 320 { 321 HB_UShort PosFormat; /* always 1 */ 322 HB_Coverage MarkCoverage; /* mark glyph coverage table */ 323 HB_Coverage BaseCoverage; /* base glyph coverage table */ 324 HB_UShort ClassCount; /* number of mark classes */ 325 HB_MarkArray MarkArray; /* mark array table */ 326 HB_BaseArray BaseArray; /* base array table */ 327 }; 328 329 typedef struct HB_MarkBasePos_ HB_MarkBasePos; 330 331 332 /* LookupType 5 */ 333 334 struct HB_ComponentRecord_ 335 { 336 HB_Anchor* LigatureAnchor; /* array of ligature glyph anchor 337 tables */ 338 }; 339 340 typedef struct HB_ComponentRecord_ HB_ComponentRecord; 341 342 343 struct HB_LigatureAttach_ 344 { 345 HB_UShort ComponentCount; 346 /* number of ComponentRecord tables */ 347 HB_ComponentRecord* ComponentRecord; 348 /* array of ComponentRecord tables */ 349 }; 350 351 typedef struct HB_LigatureAttach_ HB_LigatureAttach; 352 353 354 struct HB_LigatureArray_ 355 { 356 HB_UShort LigatureCount; /* number of LigatureAttach tables */ 357 HB_LigatureAttach* LigatureAttach; 358 /* array of LigatureAttach tables */ 359 }; 360 361 typedef struct HB_LigatureArray_ HB_LigatureArray; 362 363 364 struct HB_MarkLigPos_ 365 { 366 HB_UShort PosFormat; /* always 1 */ 367 HB_Coverage MarkCoverage; /* mark glyph coverage table */ 368 HB_Coverage LigatureCoverage; 369 /* ligature glyph coverage table */ 370 HB_UShort ClassCount; /* number of mark classes */ 371 HB_MarkArray MarkArray; /* mark array table */ 372 HB_LigatureArray LigatureArray; /* ligature array table */ 373 }; 374 375 typedef struct HB_MarkLigPos_ HB_MarkLigPos; 376 377 378 /* LookupType 6 */ 379 380 struct HB_Mark2Record_ 381 { 382 HB_Anchor* Mark2Anchor; /* array of mark glyph anchor 383 tables */ 384 }; 385 386 typedef struct HB_Mark2Record_ HB_Mark2Record; 387 388 389 struct HB_Mark2Array_ 390 { 391 HB_UShort Mark2Count; /* number of Mark2Record tables */ 392 HB_Mark2Record* Mark2Record; /* array of Mark2Record tables */ 393 }; 394 395 typedef struct HB_Mark2Array_ HB_Mark2Array; 396 397 398 struct HB_MarkMarkPos_ 399 { 400 HB_UShort PosFormat; /* always 1 */ 401 HB_Coverage Mark1Coverage; /* first mark glyph coverage table */ 402 HB_Coverage Mark2Coverage; /* second mark glyph coverave table */ 403 HB_UShort ClassCount; /* number of combining mark classes */ 404 HB_MarkArray Mark1Array; /* MarkArray table for first mark */ 405 HB_Mark2Array Mark2Array; /* MarkArray table for second mark */ 406 }; 407 408 typedef struct HB_MarkMarkPos_ HB_MarkMarkPos; 409 410 411 /* needed by both lookup type 7 and 8 */ 412 413 struct HB_PosLookupRecord_ 414 { 415 HB_UShort SequenceIndex; /* index into current 416 glyph sequence */ 417 HB_UShort LookupListIndex; /* Lookup to apply to that pos. */ 418 }; 419 420 typedef struct HB_PosLookupRecord_ HB_PosLookupRecord; 421 422 423 /* LookupType 7 */ 424 425 struct HB_PosRule_ 426 { 427 HB_UShort GlyphCount; /* total number of input glyphs */ 428 HB_UShort PosCount; /* number of PosLookupRecord tables */ 429 HB_UShort* Input; /* array of input glyph IDs */ 430 HB_PosLookupRecord* PosLookupRecord; 431 /* array of PosLookupRecord tables */ 432 }; 433 434 typedef struct HB_PosRule_ HB_PosRule; 435 436 437 struct HB_PosRuleSet_ 438 { 439 HB_UShort PosRuleCount; /* number of PosRule tables */ 440 HB_PosRule* PosRule; /* array of PosRule tables */ 441 }; 442 443 typedef struct HB_PosRuleSet_ HB_PosRuleSet; 444 445 446 struct HB_ContextPosFormat1_ 447 { 448 HB_Coverage Coverage; /* Coverage table */ 449 HB_UShort PosRuleSetCount; /* number of PosRuleSet tables */ 450 HB_PosRuleSet* PosRuleSet; /* array of PosRuleSet tables */ 451 }; 452 453 typedef struct HB_ContextPosFormat1_ HB_ContextPosFormat1; 454 455 456 struct HB_PosClassRule_ 457 { 458 HB_UShort GlyphCount; /* total number of context classes */ 459 HB_UShort PosCount; /* number of PosLookupRecord tables */ 460 HB_UShort* Class; /* array of classes */ 461 HB_PosLookupRecord* PosLookupRecord; 462 /* array of PosLookupRecord tables */ 463 }; 464 465 typedef struct HB_PosClassRule_ HB_PosClassRule; 466 467 468 struct HB_PosClassSet_ 469 { 470 HB_UShort PosClassRuleCount; 471 /* number of PosClassRule tables */ 472 HB_PosClassRule* PosClassRule; /* array of PosClassRule tables */ 473 }; 474 475 typedef struct HB_PosClassSet_ HB_PosClassSet; 476 477 478 /* The `MaxContextLength' field is not defined in the TTO specification 479 but simplifies the implementation of this format. It holds the 480 maximal context length used in the context rules. */ 481 482 struct HB_ContextPosFormat2_ 483 { 484 HB_UShort MaxContextLength; 485 /* maximal context length */ 486 HB_Coverage Coverage; /* Coverage table */ 487 HB_ClassDefinition ClassDef; /* ClassDef table */ 488 HB_UShort PosClassSetCount; 489 /* number of PosClassSet tables */ 490 HB_PosClassSet* PosClassSet; /* array of PosClassSet tables */ 491 }; 492 493 typedef struct HB_ContextPosFormat2_ HB_ContextPosFormat2; 494 495 496 struct HB_ContextPosFormat3_ 497 { 498 HB_UShort GlyphCount; /* number of input glyphs */ 499 HB_UShort PosCount; /* number of PosLookupRecord tables */ 500 HB_Coverage* Coverage; /* array of Coverage tables */ 501 HB_PosLookupRecord* PosLookupRecord; 502 /* array of PosLookupRecord tables */ 503 }; 504 505 typedef struct HB_ContextPosFormat3_ HB_ContextPosFormat3; 506 507 508 struct HB_ContextPos_ 509 { 510 HB_UShort PosFormat; /* 1, 2, or 3 */ 511 512 union 513 { 514 HB_ContextPosFormat1 cpf1; 515 HB_ContextPosFormat2 cpf2; 516 HB_ContextPosFormat3 cpf3; 517 } cpf; 518 }; 519 520 typedef struct HB_ContextPos_ HB_ContextPos; 521 522 523 /* LookupType 8 */ 524 525 struct HB_ChainPosRule_ 526 { 527 HB_UShort BacktrackGlyphCount; 528 /* total number of backtrack glyphs */ 529 HB_UShort* Backtrack; /* array of backtrack glyph IDs */ 530 HB_UShort InputGlyphCount; 531 /* total number of input glyphs */ 532 HB_UShort* Input; /* array of input glyph IDs */ 533 HB_UShort LookaheadGlyphCount; 534 /* total number of lookahead glyphs */ 535 HB_UShort* Lookahead; /* array of lookahead glyph IDs */ 536 HB_UShort PosCount; /* number of PosLookupRecords */ 537 HB_PosLookupRecord* PosLookupRecord; 538 /* array of PosLookupRecords */ 539 }; 540 541 typedef struct HB_ChainPosRule_ HB_ChainPosRule; 542 543 544 struct HB_ChainPosRuleSet_ 545 { 546 HB_UShort ChainPosRuleCount; 547 /* number of ChainPosRule tables */ 548 HB_ChainPosRule* ChainPosRule; /* array of ChainPosRule tables */ 549 }; 550 551 typedef struct HB_ChainPosRuleSet_ HB_ChainPosRuleSet; 552 553 554 struct HB_ChainContextPosFormat1_ 555 { 556 HB_Coverage Coverage; /* Coverage table */ 557 HB_UShort ChainPosRuleSetCount; 558 /* number of ChainPosRuleSet tables */ 559 HB_ChainPosRuleSet* ChainPosRuleSet; 560 /* array of ChainPosRuleSet tables */ 561 }; 562 563 typedef struct HB_ChainContextPosFormat1_ HB_ChainContextPosFormat1; 564 565 566 struct HB_ChainPosClassRule_ 567 { 568 HB_UShort BacktrackGlyphCount; 569 /* total number of backtrack 570 classes */ 571 HB_UShort* Backtrack; /* array of backtrack classes */ 572 HB_UShort InputGlyphCount; 573 /* total number of context classes */ 574 HB_UShort* Input; /* array of context classes */ 575 HB_UShort LookaheadGlyphCount; 576 /* total number of lookahead 577 classes */ 578 HB_UShort* Lookahead; /* array of lookahead classes */ 579 HB_UShort PosCount; /* number of PosLookupRecords */ 580 HB_PosLookupRecord* PosLookupRecord; 581 /* array of substitution lookups */ 582 }; 583 584 typedef struct HB_ChainPosClassRule_ HB_ChainPosClassRule; 585 586 587 struct HB_ChainPosClassSet_ 588 { 589 HB_UShort ChainPosClassRuleCount; 590 /* number of ChainPosClassRule 591 tables */ 592 HB_ChainPosClassRule* ChainPosClassRule; 593 /* array of ChainPosClassRule 594 tables */ 595 }; 596 597 typedef struct HB_ChainPosClassSet_ HB_ChainPosClassSet; 598 599 600 /* The `MaxXXXLength' fields are not defined in the TTO specification 601 but simplifies the implementation of this format. It holds the 602 maximal context length used in the specific context rules. */ 603 604 struct HB_ChainContextPosFormat2_ 605 { 606 HB_Coverage Coverage; /* Coverage table */ 607 608 HB_UShort MaxBacktrackLength; 609 /* maximal backtrack length */ 610 HB_ClassDefinition BacktrackClassDef; 611 /* BacktrackClassDef table */ 612 HB_UShort MaxInputLength; 613 /* maximal input length */ 614 HB_ClassDefinition InputClassDef; 615 /* InputClassDef table */ 616 HB_UShort MaxLookaheadLength; 617 /* maximal lookahead length */ 618 HB_ClassDefinition LookaheadClassDef; 619 /* LookaheadClassDef table */ 620 621 HB_UShort ChainPosClassSetCount; 622 /* number of ChainPosClassSet 623 tables */ 624 HB_ChainPosClassSet* ChainPosClassSet; 625 /* array of ChainPosClassSet 626 tables */ 627 }; 628 629 typedef struct HB_ChainContextPosFormat2_ HB_ChainContextPosFormat2; 630 631 632 struct HB_ChainContextPosFormat3_ 633 { 634 HB_UShort BacktrackGlyphCount; 635 /* number of backtrack glyphs */ 636 HB_Coverage* BacktrackCoverage; 637 /* array of backtrack Coverage 638 tables */ 639 HB_UShort InputGlyphCount; 640 /* number of input glyphs */ 641 HB_Coverage* InputCoverage; 642 /* array of input coverage 643 tables */ 644 HB_UShort LookaheadGlyphCount; 645 /* number of lookahead glyphs */ 646 HB_Coverage* LookaheadCoverage; 647 /* array of lookahead coverage 648 tables */ 649 HB_UShort PosCount; /* number of PosLookupRecords */ 650 HB_PosLookupRecord* PosLookupRecord; 651 /* array of substitution lookups */ 652 }; 653 654 typedef struct HB_ChainContextPosFormat3_ HB_ChainContextPosFormat3; 655 656 657 struct HB_ChainContextPos_ 658 { 659 HB_UShort PosFormat; /* 1, 2, or 3 */ 660 661 union 662 { 663 HB_ChainContextPosFormat1 ccpf1; 664 HB_ChainContextPosFormat2 ccpf2; 665 HB_ChainContextPosFormat3 ccpf3; 666 } ccpf; 667 }; 668 669 typedef struct HB_ChainContextPos_ HB_ChainContextPos; 670 671 672 #if 0 673 /* LookupType 10 */ 674 struct HB_ExtensionPos_ 675 { 676 HB_UShort PosFormat; /* always 1 */ 677 HB_UShort LookuptType; /* lookup-type of referenced subtable */ 678 HB_GPOS_SubTable *subtable; /* referenced subtable */ 679 }; 680 681 typedef struct HB_ExtensionPos_ HB_ExtensionPos; 682 #endif 683 684 685 union HB_GPOS_SubTable_ 686 { 687 HB_SinglePos single; 688 HB_PairPos pair; 689 HB_CursivePos cursive; 690 HB_MarkBasePos markbase; 691 HB_MarkLigPos marklig; 692 HB_MarkMarkPos markmark; 693 HB_ContextPos context; 694 HB_ChainContextPos chain; 695 }; 696 697 typedef union HB_GPOS_SubTable_ HB_GPOS_SubTable; 698 699 700 701 HB_INTERNAL HB_Error 702 _HB_GPOS_Load_SubTable( HB_GPOS_SubTable* st, 703 HB_Stream stream, 704 HB_UShort lookup_type ); 705 706 HB_INTERNAL void 707 _HB_GPOS_Free_SubTable( HB_GPOS_SubTable* st, 708 HB_UShort lookup_type ); 709 710 HB_END_HEADER 711 712 #endif /* HARFBUZZ_GPOS_PRIVATE_H */ 713
