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gfx/thebes/MathTableStructures.h@6474c204b198 (annotated)

gfx/thebes/MathTableStructures.h

Wed, 31 Dec 2014 06:09:35 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Wed, 31 Dec 2014 06:09:35 +0100

changeset 0

6474c204b198

permissions

-rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

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