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| 1 // Copyright (c) 2014 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 // We use an underscore to avoid confusion with the standard math.h library. |
| 6 #include "math_.h" |
| 7 |
| 8 #include <limits> |
| 9 #include <vector> |
| 10 |
| 11 #include "layout.h" |
| 12 #include "maxp.h" |
| 13 |
| 14 // MATH - The MATH Table |
| 15 // The specification is not yet public but has been submitted to the MPEG group |
| 16 // in response to the 'Call for Proposals for ISO/IEC 14496-22 "Open Font |
| 17 // Format" Color Font Technology and MATH layout support'. Meanwhile, you can |
| 18 // contact Microsoft's engineer Murray Sargent to obtain a copy. |
| 19 |
| 20 namespace { |
| 21 |
| 22 // The size of MATH header. |
| 23 // Version |
| 24 // MathConstants |
| 25 // MathGlyphInfo |
| 26 // MathVariants |
| 27 const unsigned kMathHeaderSize = 4 + 3 * 2; |
| 28 |
| 29 // The size of the MathGlyphInfo header. |
| 30 // MathItalicsCorrectionInfo |
| 31 // MathTopAccentAttachment |
| 32 // ExtendedShapeCoverage |
| 33 // MathKernInfo |
| 34 const unsigned kMathGlyphInfoHeaderSize = 4 * 2; |
| 35 |
| 36 // The size of the MathValueRecord. |
| 37 // Value |
| 38 // DeviceTable |
| 39 const unsigned kMathValueRecordSize = 2 * 2; |
| 40 |
| 41 // The size of the GlyphPartRecord. |
| 42 // glyph |
| 43 // StartConnectorLength |
| 44 // EndConnectorLength |
| 45 // FullAdvance |
| 46 // PartFlags |
| 47 const unsigned kGlyphPartRecordSize = 5 * 2; |
| 48 |
| 49 // Shared Table: MathValueRecord |
| 50 |
| 51 bool ParseMathValueRecord(ots::Buffer* subtable, const uint8_t *data, |
| 52 const size_t length) { |
| 53 // Check the Value field. |
| 54 if (!subtable->Skip(2)) { |
| 55 return OTS_FAILURE(); |
| 56 } |
| 57 |
| 58 // Check the offset to device table. |
| 59 uint16_t offset = 0; |
| 60 if (!subtable->ReadU16(&offset)) { |
| 61 return OTS_FAILURE(); |
| 62 } |
| 63 if (offset) { |
| 64 if (offset >= length) { |
| 65 return OTS_FAILURE(); |
| 66 } |
| 67 if (!ots::ParseDeviceTable(data + offset, length - offset)) { |
| 68 return OTS_FAILURE(); |
| 69 } |
| 70 } |
| 71 |
| 72 return true; |
| 73 } |
| 74 |
| 75 bool ParseMathConstantsTable(const uint8_t *data, size_t length) { |
| 76 ots::Buffer subtable(data, length); |
| 77 |
| 78 // Part 1: int16 or uint16 constants. |
| 79 // ScriptPercentScaleDown |
| 80 // ScriptScriptPercentScaleDown |
| 81 // DelimitedSubFormulaMinHeight |
| 82 // DisplayOperatorMinHeight |
| 83 if (!subtable.Skip(4 * 2)) { |
| 84 return OTS_FAILURE(); |
| 85 } |
| 86 |
| 87 // Part 2: MathValueRecord constants. |
| 88 // MathLeading |
| 89 // AxisHeight |
| 90 // AccentBaseHeight |
| 91 // FlattenedAccentBaseHeight |
| 92 // SubscriptShiftDown |
| 93 // SubscriptTopMax |
| 94 // SubscriptBaselineDropMin |
| 95 // SuperscriptShiftUp |
| 96 // SuperscriptShiftUpCramped |
| 97 // SuperscriptBottomMin |
| 98 // |
| 99 // SuperscriptBaselineDropMax |
| 100 // SubSuperscriptGapMin |
| 101 // SuperscriptBottomMaxWithSubscript |
| 102 // SpaceAfterScript |
| 103 // UpperLimitGapMin |
| 104 // UpperLimitBaselineRiseMin |
| 105 // LowerLimitGapMin |
| 106 // LowerLimitBaselineDropMin |
| 107 // StackTopShiftUp |
| 108 // StackTopDisplayStyleShiftUp |
| 109 // |
| 110 // StackBottomShiftDown |
| 111 // StackBottomDisplayStyleShiftDown |
| 112 // StackGapMin |
| 113 // StackDisplayStyleGapMin |
| 114 // StretchStackTopShiftUp |
| 115 // StretchStackBottomShiftDown |
| 116 // StretchStackGapAboveMin |
| 117 // StretchStackGapBelowMin |
| 118 // FractionNumeratorShiftUp |
| 119 // FractionNumeratorDisplayStyleShiftUp |
| 120 // |
| 121 // FractionDenominatorShiftDown |
| 122 // FractionDenominatorDisplayStyleShiftDown |
| 123 // FractionNumeratorGapMin |
| 124 // FractionNumDisplayStyleGapMin |
| 125 // FractionRuleThickness |
| 126 // FractionDenominatorGapMin |
| 127 // FractionDenomDisplayStyleGapMin |
| 128 // SkewedFractionHorizontalGap |
| 129 // SkewedFractionVerticalGap |
| 130 // OverbarVerticalGap |
| 131 // |
| 132 // OverbarRuleThickness |
| 133 // OverbarExtraAscender |
| 134 // UnderbarVerticalGap |
| 135 // UnderbarRuleThickness |
| 136 // UnderbarExtraDescender |
| 137 // RadicalVerticalGap |
| 138 // RadicalDisplayStyleVerticalGap |
| 139 // RadicalRuleThickness |
| 140 // RadicalExtraAscender |
| 141 // RadicalKernBeforeDegree |
| 142 // |
| 143 // RadicalKernAfterDegree |
| 144 for (unsigned i = 0; i < static_cast<unsigned>(51); ++i) { |
| 145 if (!ParseMathValueRecord(&subtable, data, length)) { |
| 146 return OTS_FAILURE(); |
| 147 } |
| 148 } |
| 149 |
| 150 // Part 3: uint16 constant |
| 151 // RadicalDegreeBottomRaisePercent |
| 152 if (!subtable.Skip(2)) { |
| 153 return OTS_FAILURE(); |
| 154 } |
| 155 |
| 156 return true; |
| 157 } |
| 158 |
| 159 bool ParseMathValueRecordSequenceForGlyphs(ots::Buffer* subtable, |
| 160 const uint8_t *data, |
| 161 const size_t length, |
| 162 const uint16_t num_glyphs) { |
| 163 // Check the header. |
| 164 uint16_t offset_coverage = 0; |
| 165 uint16_t sequence_count = 0; |
| 166 if (!subtable->ReadU16(&offset_coverage) || |
| 167 !subtable->ReadU16(&sequence_count)) { |
| 168 return OTS_FAILURE(); |
| 169 } |
| 170 |
| 171 const unsigned sequence_end = static_cast<unsigned>(2 * 2) + |
| 172 sequence_count * kMathValueRecordSize; |
| 173 if (sequence_end > std::numeric_limits<uint16_t>::max()) { |
| 174 return OTS_FAILURE(); |
| 175 } |
| 176 |
| 177 // Check coverage table. |
| 178 if (offset_coverage < sequence_end || offset_coverage >= length) { |
| 179 return OTS_FAILURE(); |
| 180 } |
| 181 if (!ots::ParseCoverageTable(data + offset_coverage, |
| 182 length - offset_coverage, |
| 183 num_glyphs, sequence_count)) { |
| 184 return OTS_FAILURE(); |
| 185 } |
| 186 |
| 187 // Check sequence. |
| 188 for (unsigned i = 0; i < sequence_count; ++i) { |
| 189 if (!ParseMathValueRecord(subtable, data, length)) { |
| 190 return OTS_FAILURE(); |
| 191 } |
| 192 } |
| 193 |
| 194 return true; |
| 195 } |
| 196 |
| 197 bool ParseMathItalicsCorrectionInfoTable(const uint8_t *data, |
| 198 size_t length, |
| 199 const uint16_t num_glyphs) { |
| 200 ots::Buffer subtable(data, length); |
| 201 return ParseMathValueRecordSequenceForGlyphs(&subtable, data, length, |
| 202 num_glyphs); |
| 203 } |
| 204 |
| 205 bool ParseMathTopAccentAttachmentTable(const uint8_t *data, |
| 206 size_t length, |
| 207 const uint16_t num_glyphs) { |
| 208 ots::Buffer subtable(data, length); |
| 209 return ParseMathValueRecordSequenceForGlyphs(&subtable, data, length, |
| 210 num_glyphs); |
| 211 } |
| 212 |
| 213 bool ParseMathKernTable(const uint8_t *data, size_t length) { |
| 214 ots::Buffer subtable(data, length); |
| 215 |
| 216 // Check the Height count. |
| 217 uint16_t height_count = 0; |
| 218 if (!subtable.ReadU16(&height_count)) { |
| 219 return OTS_FAILURE(); |
| 220 } |
| 221 |
| 222 // Check the Correction Heights. |
| 223 for (unsigned i = 0; i < height_count; ++i) { |
| 224 if (!ParseMathValueRecord(&subtable, data, length)) { |
| 225 return OTS_FAILURE(); |
| 226 } |
| 227 } |
| 228 |
| 229 // Check the Kern Values. |
| 230 for (unsigned i = 0; i <= height_count; ++i) { |
| 231 if (!ParseMathValueRecord(&subtable, data, length)) { |
| 232 return OTS_FAILURE(); |
| 233 } |
| 234 } |
| 235 |
| 236 return true; |
| 237 } |
| 238 |
| 239 bool ParseMathKernInfoTable(const uint8_t *data, size_t length, |
| 240 const uint16_t num_glyphs) { |
| 241 ots::Buffer subtable(data, length); |
| 242 |
| 243 // Check the header. |
| 244 uint16_t offset_coverage = 0; |
| 245 uint16_t sequence_count = 0; |
| 246 if (!subtable.ReadU16(&offset_coverage) || |
| 247 !subtable.ReadU16(&sequence_count)) { |
| 248 return OTS_FAILURE(); |
| 249 } |
| 250 |
| 251 const unsigned sequence_end = static_cast<unsigned>(2 * 2) + |
| 252 sequence_count * 4 * 2; |
| 253 if (sequence_end > std::numeric_limits<uint16_t>::max()) { |
| 254 return OTS_FAILURE(); |
| 255 } |
| 256 |
| 257 // Check coverage table. |
| 258 if (offset_coverage < sequence_end || offset_coverage >= length) { |
| 259 return OTS_FAILURE(); |
| 260 } |
| 261 if (!ots::ParseCoverageTable(data + offset_coverage, length - offset_coverage, |
| 262 num_glyphs, sequence_count)) { |
| 263 return OTS_FAILURE(); |
| 264 } |
| 265 |
| 266 // Check sequence of MathKernInfoRecord |
| 267 for (unsigned i = 0; i < sequence_count; ++i) { |
| 268 // Check TopRight, TopLeft, BottomRight and BottomLeft Math Kern. |
| 269 for (unsigned j = 0; j < 4; ++j) { |
| 270 uint16_t offset_math_kern = 0; |
| 271 if (!subtable.ReadU16(&offset_math_kern)) { |
| 272 return OTS_FAILURE(); |
| 273 } |
| 274 if (offset_math_kern) { |
| 275 if (offset_math_kern < sequence_end || offset_math_kern >= length || |
| 276 !ParseMathKernTable(data + offset_math_kern, |
| 277 length - offset_math_kern)) { |
| 278 return OTS_FAILURE(); |
| 279 } |
| 280 } |
| 281 } |
| 282 } |
| 283 |
| 284 return true; |
| 285 } |
| 286 |
| 287 bool ParseMathGlyphInfoTable(const uint8_t *data, size_t length, |
| 288 const uint16_t num_glyphs) { |
| 289 ots::Buffer subtable(data, length); |
| 290 |
| 291 // Check Header. |
| 292 uint16_t offset_math_italics_correction_info = 0; |
| 293 uint16_t offset_math_top_accent_attachment = 0; |
| 294 uint16_t offset_extended_shaped_coverage = 0; |
| 295 uint16_t offset_math_kern_info = 0; |
| 296 if (!subtable.ReadU16(&offset_math_italics_correction_info) || |
| 297 !subtable.ReadU16(&offset_math_top_accent_attachment) || |
| 298 !subtable.ReadU16(&offset_extended_shaped_coverage) || |
| 299 !subtable.ReadU16(&offset_math_kern_info)) { |
| 300 return OTS_FAILURE(); |
| 301 } |
| 302 |
| 303 // Check subtables. |
| 304 // The specification does not say whether the offsets for |
| 305 // MathItalicsCorrectionInfo, MathTopAccentAttachment and MathKernInfo may |
| 306 // be NULL, but that's the case in some fonts (e.g STIX) so we accept that. |
| 307 if (offset_math_italics_correction_info) { |
| 308 if (offset_math_italics_correction_info >= length || |
| 309 offset_math_italics_correction_info < kMathGlyphInfoHeaderSize || |
| 310 !ParseMathItalicsCorrectionInfoTable( |
| 311 data + offset_math_italics_correction_info, |
| 312 length - offset_math_italics_correction_info, |
| 313 num_glyphs)) { |
| 314 return OTS_FAILURE(); |
| 315 } |
| 316 } |
| 317 if (offset_math_top_accent_attachment) { |
| 318 if (offset_math_top_accent_attachment >= length || |
| 319 offset_math_top_accent_attachment < kMathGlyphInfoHeaderSize || |
| 320 !ParseMathTopAccentAttachmentTable(data + |
| 321 offset_math_top_accent_attachment, |
| 322 length - |
| 323 offset_math_top_accent_attachment, |
| 324 num_glyphs)) { |
| 325 return OTS_FAILURE(); |
| 326 } |
| 327 } |
| 328 if (offset_extended_shaped_coverage) { |
| 329 if (offset_extended_shaped_coverage >= length || |
| 330 offset_extended_shaped_coverage < kMathGlyphInfoHeaderSize || |
| 331 !ots::ParseCoverageTable(data + offset_extended_shaped_coverage, |
| 332 length - offset_extended_shaped_coverage, |
| 333 num_glyphs)) { |
| 334 return OTS_FAILURE(); |
| 335 } |
| 336 } |
| 337 if (offset_math_kern_info) { |
| 338 if (offset_math_kern_info >= length || |
| 339 offset_math_kern_info < kMathGlyphInfoHeaderSize || |
| 340 !ParseMathKernInfoTable(data + offset_math_kern_info, |
| 341 length - offset_math_kern_info, num_glyphs)) { |
| 342 return OTS_FAILURE(); |
| 343 } |
| 344 } |
| 345 |
| 346 return true; |
| 347 } |
| 348 |
| 349 bool ParseGlyphAssemblyTable(const uint8_t *data, |
| 350 size_t length, const uint16_t num_glyphs) { |
| 351 ots::Buffer subtable(data, length); |
| 352 |
| 353 // Check the header. |
| 354 uint16_t part_count = 0; |
| 355 if (!ParseMathValueRecord(&subtable, data, length) || |
| 356 !subtable.ReadU16(&part_count)) { |
| 357 return OTS_FAILURE(); |
| 358 } |
| 359 |
| 360 const unsigned sequence_end = kMathValueRecordSize + |
| 361 static_cast<unsigned>(2) + part_count * kGlyphPartRecordSize; |
| 362 if (sequence_end > std::numeric_limits<uint16_t>::max()) { |
| 363 return OTS_FAILURE(); |
| 364 } |
| 365 |
| 366 // Check the sequence of GlyphPartRecord. |
| 367 for (unsigned i = 0; i < part_count; ++i) { |
| 368 uint16_t glyph = 0; |
| 369 uint16_t part_flags = 0; |
| 370 if (!subtable.ReadU16(&glyph) || |
| 371 !subtable.Skip(2 * 3) || |
| 372 !subtable.ReadU16(&part_flags)) { |
| 373 return OTS_FAILURE(); |
| 374 } |
| 375 if (glyph >= num_glyphs) { |
| 376 OTS_WARNING("bad glyph ID: %u", glyph); |
| 377 return OTS_FAILURE(); |
| 378 } |
| 379 if (part_flags & ~0x00000001) { |
| 380 OTS_WARNING("unknown part flag: %u", part_flags); |
| 381 return OTS_FAILURE(); |
| 382 } |
| 383 } |
| 384 |
| 385 return true; |
| 386 } |
| 387 |
| 388 bool ParseMathGlyphConstructionTable(const uint8_t *data, |
| 389 size_t length, const uint16_t num_glyphs) { |
| 390 ots::Buffer subtable(data, length); |
| 391 |
| 392 // Check the header. |
| 393 uint16_t offset_glyph_assembly = 0; |
| 394 uint16_t variant_count = 0; |
| 395 if (!subtable.ReadU16(&offset_glyph_assembly) || |
| 396 !subtable.ReadU16(&variant_count)) { |
| 397 return OTS_FAILURE(); |
| 398 } |
| 399 |
| 400 const unsigned sequence_end = static_cast<unsigned>(2 * 2) + |
| 401 variant_count * 2 * 2; |
| 402 if (sequence_end > std::numeric_limits<uint16_t>::max()) { |
| 403 return OTS_FAILURE(); |
| 404 } |
| 405 |
| 406 // Check the GlyphAssembly offset. |
| 407 if (offset_glyph_assembly) { |
| 408 if (offset_glyph_assembly >= length || |
| 409 offset_glyph_assembly < sequence_end) { |
| 410 return OTS_FAILURE(); |
| 411 } |
| 412 if (!ParseGlyphAssemblyTable(data + offset_glyph_assembly, |
| 413 length - offset_glyph_assembly, num_glyphs)) { |
| 414 return OTS_FAILURE(); |
| 415 } |
| 416 } |
| 417 |
| 418 // Check the sequence of MathGlyphVariantRecord. |
| 419 for (unsigned i = 0; i < variant_count; ++i) { |
| 420 uint16_t glyph = 0; |
| 421 if (!subtable.ReadU16(&glyph) || |
| 422 !subtable.Skip(2)) { |
| 423 return OTS_FAILURE(); |
| 424 } |
| 425 if (glyph >= num_glyphs) { |
| 426 OTS_WARNING("bad glyph ID: %u", glyph); |
| 427 return OTS_FAILURE(); |
| 428 } |
| 429 } |
| 430 |
| 431 return true; |
| 432 } |
| 433 |
| 434 bool ParseMathGlyphConstructionSequence(ots::Buffer* subtable, |
| 435 const uint8_t *data, |
| 436 size_t length, |
| 437 const uint16_t num_glyphs, |
| 438 uint16_t offset_coverage, |
| 439 uint16_t glyph_count, |
| 440 const unsigned sequence_end) { |
| 441 // Check coverage table. |
| 442 if (offset_coverage < sequence_end || offset_coverage >= length) { |
| 443 return OTS_FAILURE(); |
| 444 } |
| 445 if (!ots::ParseCoverageTable(data + offset_coverage, |
| 446 length - offset_coverage, |
| 447 num_glyphs, glyph_count)) { |
| 448 return OTS_FAILURE(); |
| 449 } |
| 450 |
| 451 // Check sequence of MathGlyphConstruction. |
| 452 for (unsigned i = 0; i < glyph_count; ++i) { |
| 453 uint16_t offset_glyph_construction = 0; |
| 454 if (!subtable->ReadU16(&offset_glyph_construction)) { |
| 455 return OTS_FAILURE(); |
| 456 } |
| 457 if (offset_glyph_construction < sequence_end || |
| 458 offset_glyph_construction >= length || |
| 459 !ParseMathGlyphConstructionTable(data + offset_glyph_construction, |
| 460 length - offset_glyph_construction, |
| 461 num_glyphs)) { |
| 462 return OTS_FAILURE(); |
| 463 } |
| 464 } |
| 465 |
| 466 return true; |
| 467 } |
| 468 |
| 469 bool ParseMathVariantsTable(const uint8_t *data, |
| 470 size_t length, const uint16_t num_glyphs) { |
| 471 ots::Buffer subtable(data, length); |
| 472 |
| 473 // Check the header. |
| 474 uint16_t offset_vert_glyph_coverage = 0; |
| 475 uint16_t offset_horiz_glyph_coverage = 0; |
| 476 uint16_t vert_glyph_count = 0; |
| 477 uint16_t horiz_glyph_count = 0; |
| 478 if (!subtable.Skip(2) || // MinConnectorOverlap |
| 479 !subtable.ReadU16(&offset_vert_glyph_coverage) || |
| 480 !subtable.ReadU16(&offset_horiz_glyph_coverage) || |
| 481 !subtable.ReadU16(&vert_glyph_count) || |
| 482 !subtable.ReadU16(&horiz_glyph_count)) { |
| 483 return OTS_FAILURE(); |
| 484 } |
| 485 |
| 486 const unsigned sequence_end = 5 * 2 + vert_glyph_count * 2 + |
| 487 horiz_glyph_count * 2; |
| 488 if (sequence_end > std::numeric_limits<uint16_t>::max()) { |
| 489 return OTS_FAILURE(); |
| 490 } |
| 491 |
| 492 if (!ParseMathGlyphConstructionSequence(&subtable, data, length, num_glyphs, |
| 493 offset_vert_glyph_coverage, |
| 494 vert_glyph_count, |
| 495 sequence_end) || |
| 496 !ParseMathGlyphConstructionSequence(&subtable, data, length, num_glyphs, |
| 497 offset_horiz_glyph_coverage, |
| 498 horiz_glyph_count, |
| 499 sequence_end)) { |
| 500 return OTS_FAILURE(); |
| 501 } |
| 502 |
| 503 return true; |
| 504 } |
| 505 |
| 506 } // namespace |
| 507 |
| 508 #define DROP_THIS_TABLE \ |
| 509 do { file->math->data = 0; file->math->length = 0; } while (0) |
| 510 |
| 511 namespace ots { |
| 512 |
| 513 bool ots_math_parse(OpenTypeFile *file, const uint8_t *data, size_t length) { |
| 514 // Grab the number of glyphs in the file from the maxp table to check |
| 515 // GlyphIDs in MATH table. |
| 516 if (!file->maxp) { |
| 517 return OTS_FAILURE(); |
| 518 } |
| 519 const uint16_t num_glyphs = file->maxp->num_glyphs; |
| 520 |
| 521 Buffer table(data, length); |
| 522 |
| 523 OpenTypeMATH* math = new OpenTypeMATH; |
| 524 file->math = math; |
| 525 |
| 526 uint32_t version = 0; |
| 527 if (!table.ReadU32(&version)) { |
| 528 return OTS_FAILURE(); |
| 529 } |
| 530 if (version != 0x00010000) { |
| 531 OTS_WARNING("bad MATH version"); |
| 532 DROP_THIS_TABLE; |
| 533 return true; |
| 534 } |
| 535 |
| 536 uint16_t offset_math_constants = 0; |
| 537 uint16_t offset_math_glyph_info = 0; |
| 538 uint16_t offset_math_variants = 0; |
| 539 if (!table.ReadU16(&offset_math_constants) || |
| 540 !table.ReadU16(&offset_math_glyph_info) || |
| 541 !table.ReadU16(&offset_math_variants)) { |
| 542 return OTS_FAILURE(); |
| 543 } |
| 544 |
| 545 if (offset_math_constants >= length || |
| 546 offset_math_constants < kMathHeaderSize || |
| 547 offset_math_glyph_info >= length || |
| 548 offset_math_glyph_info < kMathHeaderSize || |
| 549 offset_math_variants >= length || |
| 550 offset_math_variants < kMathHeaderSize) { |
| 551 OTS_WARNING("bad offset in MATH header"); |
| 552 DROP_THIS_TABLE; |
| 553 return true; |
| 554 } |
| 555 |
| 556 if (!ParseMathConstantsTable(data + offset_math_constants, |
| 557 length - offset_math_constants)) { |
| 558 DROP_THIS_TABLE; |
| 559 return true; |
| 560 } |
| 561 if (!ParseMathGlyphInfoTable(data + offset_math_glyph_info, |
| 562 length - offset_math_glyph_info, num_glyphs)) { |
| 563 DROP_THIS_TABLE; |
| 564 return true; |
| 565 } |
| 566 if (!ParseMathVariantsTable(data + offset_math_variants, |
| 567 length - offset_math_variants, num_glyphs)) { |
| 568 DROP_THIS_TABLE; |
| 569 return true; |
| 570 } |
| 571 |
| 572 math->data = data; |
| 573 math->length = length; |
| 574 return true; |
| 575 } |
| 576 |
| 577 bool ots_math_should_serialise(OpenTypeFile *file) { |
| 578 return file->math != NULL && file->math->data != NULL; |
| 579 } |
| 580 |
| 581 bool ots_math_serialise(OTSStream *out, OpenTypeFile *file) { |
| 582 if (!out->Write(file->math->data, file->math->length)) { |
| 583 return OTS_FAILURE(); |
| 584 } |
| 585 |
| 586 return true; |
| 587 } |
| 588 |
| 589 void ots_math_free(OpenTypeFile *file) { |
| 590 delete file->math; |
| 591 } |
| 592 |
| 593 } // namespace ots |
| 594 |
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