diff -r 000000000000 -r 6474c204b198 gfx/thebes/MathTableStructures.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/thebes/MathTableStructures.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,121 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// This file contains the structures described in Microsoft's document
+// "The MATH table and OpenType Features for Math Processing" (not yet public).
+//
+// Arrays of varying size are indicated in comments. Typically, gfxMathTable
+// will read the header of the structure first, verify that there is enough
+// space for the specified arrays and then use a pointer to browse these arrays.
+
+#ifndef MATH_TABLE_STRUCTURE_H
+#define MATH_TABLE_STRUCTURE_H
+
+#include "gfxFontUtils.h"
+
+typedef mozilla::AutoSwap_PRUint16 Count16;
+typedef mozilla::AutoSwap_PRUint16 GlyphID;
+typedef mozilla::AutoSwap_PRUint16 Offset;
+
+struct MathValueRecord {
+  mozilla::AutoSwap_PRInt16  mValue;
+  Offset                     mDeviceTable;
+};
+
+struct RangeRecord {
+  GlyphID                    mStart;
+  GlyphID                    mEnd;
+  mozilla::AutoSwap_PRUint16 mStartCoverageIndex;
+};
+
+struct Coverage {
+  mozilla::AutoSwap_PRUint16 mFormat;
+};
+
+struct CoverageFormat1 {
+  mozilla::AutoSwap_PRUint16 mFormat;
+  Count16                    mGlyphCount;
+  // GlyphID                 mGlyphArray[mGlyphCount]
+};
+
+struct CoverageFormat2 {
+  mozilla::AutoSwap_PRUint16 mFormat;
+  Count16                    mRangeCount;
+  // RangeRecord             mRangeArray[mRangeCount];
+};
+
+struct MATHTableHeader {
+  mozilla::AutoSwap_PRUint32 mVersion;
+  Offset                     mMathConstants;
+  Offset                     mMathGlyphInfo;
+  Offset                     mMathVariants;
+};
+
+struct MathConstants {
+  mozilla::AutoSwap_PRInt16  mInt16[gfxFontEntry::ScriptScriptPercentScaleDown -
+                                    gfxFontEntry::ScriptPercentScaleDown + 1];
+  mozilla::AutoSwap_PRUint16 mUint16[gfxFontEntry::DisplayOperatorMinHeight -
+                                     gfxFontEntry::
+                                     DelimitedSubFormulaMinHeight + 1];
+  MathValueRecord            mMathValues[gfxFontEntry::RadicalKernAfterDegree -
+                                         gfxFontEntry::MathLeading + 1];
+  mozilla::AutoSwap_PRUint16 mRadicalDegreeBottomRaisePercent;
+};
+
+struct MathGlyphInfo {
+  Offset mMathItalicsCorrectionInfo;
+  Offset mMathTopAccentAttachment;
+  Offset mExtendedShapeCoverage;
+  Offset mMathKernInfo;
+};
+
+struct MathItalicsCorrectionInfo {
+  Offset  mCoverage;
+  Count16 mItalicsCorrectionCount;
+  // MathValueRecord mItalicsCorrection[mItalicsCorrectionCount]
+};
+
+struct MathVariants {
+  mozilla::AutoSwap_PRUint16 mMinConnectorOverlap;
+  Offset                     mVertGlyphCoverage;
+  Offset                     mHorizGlyphCoverage;
+  Count16                    mVertGlyphCount;
+  Count16                    mHorizGlyphCount;
+  // Offset                  mVertGlyphConstruction[mVertGlyphCount];
+  // Offset                  mHorizGlyphConstruction[mHorizGlyphCount];
+};
+
+struct MathGlyphVariantRecord {
+  GlyphID                    mVariantGlyph;
+  mozilla::AutoSwap_PRUint16 mAdvanceMeasurement;
+};
+
+struct MathGlyphConstruction {
+  Offset                    mGlyphAssembly;
+  Count16                   mVariantCount;
+  // MathGlyphVariantRecord mMathGlyphVariantRecord[mVariantCount]
+};
+
+struct GlyphPartRecord {
+  GlyphID	              mGlyph;
+  mozilla::AutoSwap_PRUint16 mStartConnectorLength;
+  mozilla::AutoSwap_PRUint16 mEndConnectorLength;
+  mozilla::AutoSwap_PRUint16 mFullAdvance;
+  mozilla::AutoSwap_PRUint16 mPartFlags;
+};
+
+// PartFlags enumeration currently uses only one bit:
+// 0x0001 If set, the part can be skipped or repeated.
+// 0xFFFE Reserved.
+enum {
+  PART_FLAG_EXTENDER = 0x01
+};
+
+struct GlyphAssembly {
+  MathValueRecord    mItalicsCorrection;
+  Count16            mPartCount;
+  // GlyphPartRecord mPartRecords[mPartCount]
+};
+
+#endif