1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/thebes/MathTableStructures.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,121 @@
1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.6 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.7 +
1.8 +// This file contains the structures described in Microsoft's document
1.9 +// "The MATH table and OpenType Features for Math Processing" (not yet public).
1.10 +//
1.11 +// Arrays of varying size are indicated in comments. Typically, gfxMathTable
1.12 +// will read the header of the structure first, verify that there is enough
1.13 +// space for the specified arrays and then use a pointer to browse these arrays.
1.14 +
1.15 +#ifndef MATH_TABLE_STRUCTURE_H
1.16 +#define MATH_TABLE_STRUCTURE_H
1.17 +
1.18 +#include "gfxFontUtils.h"
1.19 +
1.20 +typedef mozilla::AutoSwap_PRUint16 Count16;
1.21 +typedef mozilla::AutoSwap_PRUint16 GlyphID;
1.22 +typedef mozilla::AutoSwap_PRUint16 Offset;
1.23 +
1.24 +struct MathValueRecord {
1.25 + mozilla::AutoSwap_PRInt16 mValue;
1.26 + Offset mDeviceTable;
1.27 +};
1.28 +
1.29 +struct RangeRecord {
1.30 + GlyphID mStart;
1.31 + GlyphID mEnd;
1.32 + mozilla::AutoSwap_PRUint16 mStartCoverageIndex;
1.33 +};
1.34 +
1.35 +struct Coverage {
1.36 + mozilla::AutoSwap_PRUint16 mFormat;
1.37 +};
1.38 +
1.39 +struct CoverageFormat1 {
1.40 + mozilla::AutoSwap_PRUint16 mFormat;
1.41 + Count16 mGlyphCount;
1.42 + // GlyphID mGlyphArray[mGlyphCount]
1.43 +};
1.44 +
1.45 +struct CoverageFormat2 {
1.46 + mozilla::AutoSwap_PRUint16 mFormat;
1.47 + Count16 mRangeCount;
1.48 + // RangeRecord mRangeArray[mRangeCount];
1.49 +};
1.50 +
1.51 +struct MATHTableHeader {
1.52 + mozilla::AutoSwap_PRUint32 mVersion;
1.53 + Offset mMathConstants;
1.54 + Offset mMathGlyphInfo;
1.55 + Offset mMathVariants;
1.56 +};
1.57 +
1.58 +struct MathConstants {
1.59 + mozilla::AutoSwap_PRInt16 mInt16[gfxFontEntry::ScriptScriptPercentScaleDown -
1.60 + gfxFontEntry::ScriptPercentScaleDown + 1];
1.61 + mozilla::AutoSwap_PRUint16 mUint16[gfxFontEntry::DisplayOperatorMinHeight -
1.62 + gfxFontEntry::
1.63 + DelimitedSubFormulaMinHeight + 1];
1.64 + MathValueRecord mMathValues[gfxFontEntry::RadicalKernAfterDegree -
1.65 + gfxFontEntry::MathLeading + 1];
1.66 + mozilla::AutoSwap_PRUint16 mRadicalDegreeBottomRaisePercent;
1.67 +};
1.68 +
1.69 +struct MathGlyphInfo {
1.70 + Offset mMathItalicsCorrectionInfo;
1.71 + Offset mMathTopAccentAttachment;
1.72 + Offset mExtendedShapeCoverage;
1.73 + Offset mMathKernInfo;
1.74 +};
1.75 +
1.76 +struct MathItalicsCorrectionInfo {
1.77 + Offset mCoverage;
1.78 + Count16 mItalicsCorrectionCount;
1.79 + // MathValueRecord mItalicsCorrection[mItalicsCorrectionCount]
1.80 +};
1.81 +
1.82 +struct MathVariants {
1.83 + mozilla::AutoSwap_PRUint16 mMinConnectorOverlap;
1.84 + Offset mVertGlyphCoverage;
1.85 + Offset mHorizGlyphCoverage;
1.86 + Count16 mVertGlyphCount;
1.87 + Count16 mHorizGlyphCount;
1.88 + // Offset mVertGlyphConstruction[mVertGlyphCount];
1.89 + // Offset mHorizGlyphConstruction[mHorizGlyphCount];
1.90 +};
1.91 +
1.92 +struct MathGlyphVariantRecord {
1.93 + GlyphID mVariantGlyph;
1.94 + mozilla::AutoSwap_PRUint16 mAdvanceMeasurement;
1.95 +};
1.96 +
1.97 +struct MathGlyphConstruction {
1.98 + Offset mGlyphAssembly;
1.99 + Count16 mVariantCount;
1.100 + // MathGlyphVariantRecord mMathGlyphVariantRecord[mVariantCount]
1.101 +};
1.102 +
1.103 +struct GlyphPartRecord {
1.104 + GlyphID mGlyph;
1.105 + mozilla::AutoSwap_PRUint16 mStartConnectorLength;
1.106 + mozilla::AutoSwap_PRUint16 mEndConnectorLength;
1.107 + mozilla::AutoSwap_PRUint16 mFullAdvance;
1.108 + mozilla::AutoSwap_PRUint16 mPartFlags;
1.109 +};
1.110 +
1.111 +// PartFlags enumeration currently uses only one bit:
1.112 +// 0x0001 If set, the part can be skipped or repeated.
1.113 +// 0xFFFE Reserved.
1.114 +enum {
1.115 + PART_FLAG_EXTENDER = 0x01
1.116 +};
1.117 +
1.118 +struct GlyphAssembly {
1.119 + MathValueRecord mItalicsCorrection;
1.120 + Count16 mPartCount;
1.121 + // GlyphPartRecord mPartRecords[mPartCount]
1.122 +};
1.123 +
1.124 +#endif
