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comparison: gfx/thebes/MathTableStructures.h
gfx/thebes/MathTableStructures.h
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- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:8cd1d88100f0 |
|---|---|
| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 // This file contains the structures described in Microsoft's document | |
| 6 // "The MATH table and OpenType Features for Math Processing" (not yet public). | |
| 7 // | |
| 8 // Arrays of varying size are indicated in comments. Typically, gfxMathTable | |
| 9 // will read the header of the structure first, verify that there is enough | |
| 10 // space for the specified arrays and then use a pointer to browse these arrays. | |
| 11 | |
| 12 #ifndef MATH_TABLE_STRUCTURE_H | |
| 13 #define MATH_TABLE_STRUCTURE_H | |
| 14 | |
| 15 #include "gfxFontUtils.h" | |
| 16 | |
| 17 typedef mozilla::AutoSwap_PRUint16 Count16; | |
| 18 typedef mozilla::AutoSwap_PRUint16 GlyphID; | |
| 19 typedef mozilla::AutoSwap_PRUint16 Offset; | |
| 20 | |
| 21 struct MathValueRecord { | |
| 22 mozilla::AutoSwap_PRInt16 mValue; | |
| 23 Offset mDeviceTable; | |
| 24 }; | |
| 25 | |
| 26 struct RangeRecord { | |
| 27 GlyphID mStart; | |
| 28 GlyphID mEnd; | |
| 29 mozilla::AutoSwap_PRUint16 mStartCoverageIndex; | |
| 30 }; | |
| 31 | |
| 32 struct Coverage { | |
| 33 mozilla::AutoSwap_PRUint16 mFormat; | |
| 34 }; | |
| 35 | |
| 36 struct CoverageFormat1 { | |
| 37 mozilla::AutoSwap_PRUint16 mFormat; | |
| 38 Count16 mGlyphCount; | |
| 39 // GlyphID mGlyphArray[mGlyphCount] | |
| 40 }; | |
| 41 | |
| 42 struct CoverageFormat2 { | |
| 43 mozilla::AutoSwap_PRUint16 mFormat; | |
| 44 Count16 mRangeCount; | |
| 45 // RangeRecord mRangeArray[mRangeCount]; | |
| 46 }; | |
| 47 | |
| 48 struct MATHTableHeader { | |
| 49 mozilla::AutoSwap_PRUint32 mVersion; | |
| 50 Offset mMathConstants; | |
| 51 Offset mMathGlyphInfo; | |
| 52 Offset mMathVariants; | |
| 53 }; | |
| 54 | |
| 55 struct MathConstants { | |
| 56 mozilla::AutoSwap_PRInt16 mInt16[gfxFontEntry::ScriptScriptPercentScaleDown - | |
| 57 gfxFontEntry::ScriptPercentScaleDown + 1]; | |
| 58 mozilla::AutoSwap_PRUint16 mUint16[gfxFontEntry::DisplayOperatorMinHeight - | |
| 59 gfxFontEntry:: | |
| 60 DelimitedSubFormulaMinHeight + 1]; | |
| 61 MathValueRecord mMathValues[gfxFontEntry::RadicalKernAfterDegree - | |
| 62 gfxFontEntry::MathLeading + 1]; | |
| 63 mozilla::AutoSwap_PRUint16 mRadicalDegreeBottomRaisePercent; | |
| 64 }; | |
| 65 | |
| 66 struct MathGlyphInfo { | |
| 67 Offset mMathItalicsCorrectionInfo; | |
| 68 Offset mMathTopAccentAttachment; | |
| 69 Offset mExtendedShapeCoverage; | |
| 70 Offset mMathKernInfo; | |
| 71 }; | |
| 72 | |
| 73 struct MathItalicsCorrectionInfo { | |
| 74 Offset mCoverage; | |
| 75 Count16 mItalicsCorrectionCount; | |
| 76 // MathValueRecord mItalicsCorrection[mItalicsCorrectionCount] | |
| 77 }; | |
| 78 | |
| 79 struct MathVariants { | |
| 80 mozilla::AutoSwap_PRUint16 mMinConnectorOverlap; | |
| 81 Offset mVertGlyphCoverage; | |
| 82 Offset mHorizGlyphCoverage; | |
| 83 Count16 mVertGlyphCount; | |
| 84 Count16 mHorizGlyphCount; | |
| 85 // Offset mVertGlyphConstruction[mVertGlyphCount]; | |
| 86 // Offset mHorizGlyphConstruction[mHorizGlyphCount]; | |
| 87 }; | |
| 88 | |
| 89 struct MathGlyphVariantRecord { | |
| 90 GlyphID mVariantGlyph; | |
| 91 mozilla::AutoSwap_PRUint16 mAdvanceMeasurement; | |
| 92 }; | |
| 93 | |
| 94 struct MathGlyphConstruction { | |
| 95 Offset mGlyphAssembly; | |
| 96 Count16 mVariantCount; | |
| 97 // MathGlyphVariantRecord mMathGlyphVariantRecord[mVariantCount] | |
| 98 }; | |
| 99 | |
| 100 struct GlyphPartRecord { | |
| 101 GlyphID mGlyph; | |
| 102 mozilla::AutoSwap_PRUint16 mStartConnectorLength; | |
| 103 mozilla::AutoSwap_PRUint16 mEndConnectorLength; | |
| 104 mozilla::AutoSwap_PRUint16 mFullAdvance; | |
| 105 mozilla::AutoSwap_PRUint16 mPartFlags; | |
| 106 }; | |
| 107 | |
| 108 // PartFlags enumeration currently uses only one bit: | |
| 109 // 0x0001 If set, the part can be skipped or repeated. | |
| 110 // 0xFFFE Reserved. | |
| 111 enum { | |
| 112 PART_FLAG_EXTENDER = 0x01 | |
| 113 }; | |
| 114 | |
| 115 struct GlyphAssembly { | |
| 116 MathValueRecord mItalicsCorrection; | |
| 117 Count16 mPartCount; | |
| 118 // GlyphPartRecord mPartRecords[mPartCount] | |
| 119 }; | |
| 120 | |
| 121 #endif |
