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/*
* @(#)ContextualSubstSubtables.h 1.7 00/03/15
*
* (C) Copyright IBM Corp. 1998, 1999, 2000, 2001 - All Rights Reserved
*
*/
#ifndef __CONTEXTUALSUBSTITUTIONSUBTABLES_H
#define __CONTEXTUALSUBSTITUTIONSUBTABLES_H
#include "LETypes.h"
#include "LEFontInstance.h"
#include "OpenTypeTables.h"
#include "GlyphSubstitutionTables.h"
#include "GlyphIterator.h"
#include "LookupProcessor.h"
U_NAMESPACE_BEGIN
struct SubstitutionLookupRecord
{
le_uint16 sequenceIndex;
le_uint16 lookupListIndex;
};
struct ContextualSubstitutionBase : GlyphSubstitutionSubtable
{
static le_bool matchGlyphIDs(
const LEGlyphID *glyphArray, le_uint16 glyphCount, GlyphIterator *glyphIterator);
static le_bool matchGlyphClasses(
const le_uint16 *classArray, le_uint16 glyphCount, GlyphIterator *glyphIterator,
const ClassDefinitionTable *classDefinitionTable);
static le_bool matchGlyphCoverages(
const Offset *coverageTableOffsetArray, le_uint16 glyphCount,
GlyphIterator *glyphIterator, const char *offsetBase);
static void applySubstitutionLookups(
const LookupProcessor *lookupProcessor,
const SubstitutionLookupRecord *substLookupRecordArray,
le_uint16 substCount,
GlyphIterator *glyphIterator,
const LEFontInstance *fontInstance,
le_int32 position);
};
struct ContextualSubstitutionSubtable : ContextualSubstitutionBase
{
le_uint32 process(const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const;
};
struct ContextualSubstitutionFormat1Subtable : ContextualSubstitutionSubtable
{
le_uint16 subRuleSetCount;
Offset subRuleSetTableOffsetArray[ANY_NUMBER];
le_uint32 process(const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const;
};
struct SubRuleSetTable
{
le_uint16 subRuleCount;
Offset subRuleTableOffsetArray[ANY_NUMBER];
};
// NOTE: Multiple variable size arrays!!
struct SubRuleTable
{
le_uint16 glyphCount;
le_uint16 substCount;
LEGlyphID inputGlyphArray[ANY_NUMBER];
//SubstitutionLookupRecord substLookupRecordArray[ANY_NUMBER];
};
struct ContextualSubstitutionFormat2Subtable : ContextualSubstitutionSubtable
{
Offset classDefTableOffset;
le_uint16 subClassSetCount;
Offset subClassSetTableOffsetArray[ANY_NUMBER];
le_uint32 process(const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const;
};
struct SubClassSetTable
{
le_uint16 subClassRuleCount;
Offset subClassRuleTableOffsetArray[ANY_NUMBER];
};
// NOTE: Multiple variable size arrays!!
struct SubClassRuleTable
{
le_uint16 glyphCount;
le_uint16 substCount;
le_uint16 classArray[ANY_NUMBER];
//SubstitutionLookupRecord substLookupRecordArray[ANY_NUMBER];
};
// NOTE: This isn't a subclass of GlyphSubstitutionSubtable 'cause
// it has an array of coverage tables instead of a single coverage table...
//
// NOTE: Multiple variable size arrays!!
struct ContextualSubstitutionFormat3Subtable
{
le_uint16 substFormat;
le_uint16 glyphCount;
le_uint16 substCount;
Offset coverageTableOffsetArray[ANY_NUMBER];
//SubstitutionLookupRecord substLookupRecord[ANY_NUMBER];
le_uint32 process(const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const;
};
struct ChainingContextualSubstitutionSubtable : ContextualSubstitutionBase
{
le_uint32 process(const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const;
};
struct ChainingContextualSubstitutionFormat1Subtable : ChainingContextualSubstitutionSubtable
{
le_uint16 chainSubRuleSetCount;
Offset chainSubRuleSetTableOffsetArray[ANY_NUMBER];
le_uint32 process(const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const;
};
struct ChainSubRuleSetTable
{
le_uint16 chainSubRuleCount;
Offset chainSubRuleTableOffsetArray[ANY_NUMBER];
};
// NOTE: Multiple variable size arrays!!
struct ChainSubRuleTable
{
le_uint16 backtrackGlyphCount;
LEGlyphID backtrackGlyphArray[ANY_NUMBER];
//le_uint16 inputGlyphCount;
//LEGlyphID inputGlyphArray[ANY_NUMBER];
//le_uint16 lookaheadGlyphCount;
//LEGlyphID lookaheadGlyphArray[ANY_NUMBER];
//le_uint16 substCount;
//SubstitutionLookupRecord substLookupRecordArray[ANY_NUMBER];
};
struct ChainingContextualSubstitutionFormat2Subtable : ChainingContextualSubstitutionSubtable
{
Offset backtrackClassDefTableOffset;
Offset inputClassDefTableOffset;
Offset lookaheadClassDefTableOffset;
le_uint16 chainSubClassSetCount;
Offset chainSubClassSetTableOffsetArray[ANY_NUMBER];
le_uint32 process(const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const;
};
struct ChainSubClassSetTable
{
le_uint16 chainSubClassRuleCount;
Offset chainSubClassRuleTableOffsetArray[ANY_NUMBER];
};
// NOTE: Multiple variable size arrays!!
struct ChainSubClassRuleTable
{
le_uint16 backtrackGlyphCount;
le_uint16 backtrackClassArray[ANY_NUMBER];
//le_uint16 inputGlyphCount;
//le_uint16 inputClassArray[ANY_NUMBER];
//le_uint16 lookaheadGlyphCount;
//le_uint16 lookaheadClassArray[ANY_NUMBER];
//le_uint16 substCount;
//SubstitutionLookupRecord substLookupRecordArray[ANY_NUMBER];
};
// NOTE: This isn't a subclass of GlyphSubstitutionSubtable 'cause
// it has arrays of coverage tables instead of a single coverage table...
//
// NOTE: Multiple variable size arrays!!
struct ChainingContextualSubstitutionFormat3Subtable
{
le_uint16 substFormat;
le_uint16 backtrackGlyphCount;
Offset backtrackCoverageTableOffsetArray[ANY_NUMBER];
//le_uint16 inputGlyphCount;
//Offset inputCoverageTableOffsetArray[ANY_NUMBER];
//le_uint16 lookaheadGlyphCount;
//le_uint16 lookaheadCoverageTableOffsetArray[ANY_NUMBER];
//le_uint16 substCount;
//SubstitutionLookupRecord substLookupRecord[ANY_NUMBER];
le_uint32 process(const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const;
};
U_NAMESPACE_END
#endif
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