| OLD | NEW |
|---|
| (Empty) |
| 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 */ | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 384503008:
Delete third_party/harfbuzz (Closed)
Base URL: https://skia.googlesource.com/skia.git@master