228 lines
7.4 KiB
C
228 lines
7.4 KiB
C
/*
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*
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* (C) Copyright IBM Corp. 1998-2013 - All Rights Reserved
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*
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*/
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#ifndef __CONTEXTUALSUBSTITUTIONSUBTABLES_H
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#define __CONTEXTUALSUBSTITUTIONSUBTABLES_H
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/**
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* \file
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* \internal
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*/
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#include "LETypes.h"
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#include "LEFontInstance.h"
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#include "OpenTypeTables.h"
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#include "GlyphSubstitutionTables.h"
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#include "GlyphIterator.h"
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#include "LookupProcessor.h"
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#include "LETableReference.h"
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U_NAMESPACE_BEGIN
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struct SubstitutionLookupRecord
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{
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le_uint16 sequenceIndex;
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le_uint16 lookupListIndex;
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};
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struct ContextualSubstitutionBase : GlyphSubstitutionSubtable
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{
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static le_bool matchGlyphIDs(
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const TTGlyphID *glyphArray, le_uint16 glyphCount, GlyphIterator *glyphIterator,
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le_bool backtrack = FALSE);
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static le_bool matchGlyphClasses(
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const le_uint16 *classArray, le_uint16 glyphCount, GlyphIterator *glyphIterator,
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const ClassDefinitionTable *classDefinitionTable, le_bool backtrack = FALSE);
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static le_bool matchGlyphCoverages(
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const Offset *coverageTableOffsetArray, le_uint16 glyphCount,
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GlyphIterator *glyphIterator, const char *offsetBase, le_bool backtrack = FALSE);
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static void applySubstitutionLookups(
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const LookupProcessor *lookupProcessor,
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const SubstitutionLookupRecord *substLookupRecordArray,
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le_uint16 substCount,
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GlyphIterator *glyphIterator,
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const LEFontInstance *fontInstance,
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le_int32 position,
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LEErrorCode& success);
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};
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struct ContextualSubstitutionSubtable : ContextualSubstitutionBase
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{
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le_uint32 process(const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode& success) const;
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};
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struct ContextualSubstitutionFormat1Subtable : ContextualSubstitutionSubtable
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{
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le_uint16 subRuleSetCount;
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Offset subRuleSetTableOffsetArray[ANY_NUMBER];
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le_uint32 process(const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode& success) const;
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};
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LE_VAR_ARRAY(ContextualSubstitutionFormat1Subtable, subRuleSetTableOffsetArray)
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struct SubRuleSetTable
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{
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le_uint16 subRuleCount;
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Offset subRuleTableOffsetArray[ANY_NUMBER];
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};
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LE_VAR_ARRAY(SubRuleSetTable, subRuleTableOffsetArray)
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// NOTE: Multiple variable size arrays!!
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struct SubRuleTable
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{
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le_uint16 glyphCount;
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le_uint16 substCount;
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TTGlyphID inputGlyphArray[ANY_NUMBER];
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//SubstitutionLookupRecord substLookupRecordArray[ANY_NUMBER];
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};
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LE_VAR_ARRAY(SubRuleTable, inputGlyphArray)
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struct ContextualSubstitutionFormat2Subtable : ContextualSubstitutionSubtable
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{
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Offset classDefTableOffset;
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le_uint16 subClassSetCount;
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Offset subClassSetTableOffsetArray[ANY_NUMBER];
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le_uint32 process(const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode& success) const;
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};
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LE_VAR_ARRAY(ContextualSubstitutionFormat2Subtable, subClassSetTableOffsetArray)
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struct SubClassSetTable
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{
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le_uint16 subClassRuleCount;
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Offset subClassRuleTableOffsetArray[ANY_NUMBER];
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};
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LE_VAR_ARRAY(SubClassSetTable, subClassRuleTableOffsetArray)
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// NOTE: Multiple variable size arrays!!
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struct SubClassRuleTable
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{
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le_uint16 glyphCount;
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le_uint16 substCount;
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le_uint16 classArray[ANY_NUMBER];
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//SubstitutionLookupRecord substLookupRecordArray[ANY_NUMBER];
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};
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LE_VAR_ARRAY(SubClassRuleTable, classArray)
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// NOTE: This isn't a subclass of GlyphSubstitutionSubtable 'cause
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// it has an array of coverage tables instead of a single coverage table...
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//
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// NOTE: Multiple variable size arrays!!
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struct ContextualSubstitutionFormat3Subtable
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{
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le_uint16 substFormat;
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le_uint16 glyphCount;
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le_uint16 substCount;
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Offset coverageTableOffsetArray[ANY_NUMBER];
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//SubstitutionLookupRecord substLookupRecord[ANY_NUMBER];
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le_uint32 process(const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode& success) const;
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};
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LE_VAR_ARRAY(ContextualSubstitutionFormat3Subtable, coverageTableOffsetArray)
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struct ChainingContextualSubstitutionSubtable : ContextualSubstitutionBase
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{
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le_uint32 process(const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode& success) const;
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};
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struct ChainingContextualSubstitutionFormat1Subtable : ChainingContextualSubstitutionSubtable
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{
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le_uint16 chainSubRuleSetCount;
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Offset chainSubRuleSetTableOffsetArray[ANY_NUMBER];
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le_uint32 process(const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode& success) const;
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};
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LE_VAR_ARRAY(ChainingContextualSubstitutionFormat1Subtable, chainSubRuleSetTableOffsetArray)
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struct ChainSubRuleSetTable
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{
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le_uint16 chainSubRuleCount;
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Offset chainSubRuleTableOffsetArray[ANY_NUMBER];
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};
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LE_VAR_ARRAY(ChainSubRuleSetTable, chainSubRuleTableOffsetArray)
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// NOTE: Multiple variable size arrays!!
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struct ChainSubRuleTable
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{
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le_uint16 backtrackGlyphCount;
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TTGlyphID backtrackGlyphArray[ANY_NUMBER];
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//le_uint16 inputGlyphCount;
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//TTGlyphID inputGlyphArray[ANY_NUMBER];
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//le_uint16 lookaheadGlyphCount;
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//TTGlyphID lookaheadGlyphArray[ANY_NUMBER];
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//le_uint16 substCount;
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//SubstitutionLookupRecord substLookupRecordArray[ANY_NUMBER];
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};
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LE_VAR_ARRAY(ChainSubRuleTable, backtrackGlyphArray)
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struct ChainingContextualSubstitutionFormat2Subtable : ChainingContextualSubstitutionSubtable
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{
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Offset backtrackClassDefTableOffset;
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Offset inputClassDefTableOffset;
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Offset lookaheadClassDefTableOffset;
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le_uint16 chainSubClassSetCount;
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Offset chainSubClassSetTableOffsetArray[ANY_NUMBER];
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le_uint32 process(const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode& success) const;
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};
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LE_VAR_ARRAY(ChainingContextualSubstitutionFormat2Subtable, chainSubClassSetTableOffsetArray)
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struct ChainSubClassSetTable
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{
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le_uint16 chainSubClassRuleCount;
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Offset chainSubClassRuleTableOffsetArray[ANY_NUMBER];
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};
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LE_VAR_ARRAY(ChainSubClassSetTable, chainSubClassRuleTableOffsetArray)
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// NOTE: Multiple variable size arrays!!
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struct ChainSubClassRuleTable
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{
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le_uint16 backtrackGlyphCount;
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le_uint16 backtrackClassArray[ANY_NUMBER];
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//le_uint16 inputGlyphCount;
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//le_uint16 inputClassArray[ANY_NUMBER];
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//le_uint16 lookaheadGlyphCount;
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//le_uint16 lookaheadClassArray[ANY_NUMBER];
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//le_uint16 substCount;
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//SubstitutionLookupRecord substLookupRecordArray[ANY_NUMBER];
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};
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LE_VAR_ARRAY(ChainSubClassRuleTable, backtrackClassArray)
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// NOTE: This isn't a subclass of GlyphSubstitutionSubtable 'cause
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// it has arrays of coverage tables instead of a single coverage table...
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//
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// NOTE: Multiple variable size arrays!!
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struct ChainingContextualSubstitutionFormat3Subtable
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{
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le_uint16 substFormat;
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le_uint16 backtrackGlyphCount;
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Offset backtrackCoverageTableOffsetArray[ANY_NUMBER];
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//le_uint16 inputGlyphCount;
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//Offset inputCoverageTableOffsetArray[ANY_NUMBER];
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//le_uint16 lookaheadGlyphCount;
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//le_uint16 lookaheadCoverageTableOffsetArray[ANY_NUMBER];
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//le_uint16 substCount;
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//SubstitutionLookupRecord substLookupRecord[ANY_NUMBER];
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le_uint32 process(const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode& success) const;
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};
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LE_VAR_ARRAY(ChainingContextualSubstitutionFormat3Subtable, backtrackCoverageTableOffsetArray)
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U_NAMESPACE_END
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#endif
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