93 lines
2.8 KiB
C++
93 lines
2.8 KiB
C++
/*
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* @(#)MorphTables.cpp 1.6 00/03/15
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*
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* (C) Copyright IBM Corp. 1998, 1999, 2000, 2001 - All Rights Reserved
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*
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*/
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#include "LETypes.h"
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#include "LayoutTables.h"
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#include "MorphTables.h"
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#include "SubtableProcessor.h"
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#include "IndicRearrangementProcessor.h"
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#include "ContextualGlyphSubstProc.h"
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#include "LigatureSubstProc.h"
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#include "NonContextualGlyphSubstProc.h"
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//#include "ContextualGlyphInsertionProcessor.h"
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#include "LESwaps.h"
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void MorphTableHeader::process(LEGlyphID *glyphs, le_int32 *glyphIndices, le_int32 glyphCount) const
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{
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const ChainHeader *chainHeader = chains;
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le_uint32 chainCount = SWAPL(this->nChains);
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le_uint32 chain;
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for (chain = 0; chain < chainCount; chain += 1) {
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FeatureFlags defaultFlags = SWAPL(chainHeader->defaultFlags);
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le_uint32 chainLength = SWAPL(chainHeader->chainLength);
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le_int16 nFeatureEntries = SWAPW(chainHeader->nFeatureEntries);
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le_int16 nSubtables = SWAPW(chainHeader->nSubtables);
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const MorphSubtableHeader *subtableHeader =
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(const MorphSubtableHeader *)&chainHeader->featureTable[nFeatureEntries];
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le_int16 subtable;
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for (subtable = 0; subtable < nSubtables; subtable += 1) {
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le_int16 length = SWAPW(subtableHeader->length);
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SubtableCoverage coverage = SWAPW(subtableHeader->coverage);
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FeatureFlags subtableFeatures = SWAPL(subtableHeader->subtableFeatures);
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// should check coverage too, really...
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if ((subtableFeatures & defaultFlags) != 0) {
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subtableHeader->process(glyphs, glyphIndices, glyphCount);
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}
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subtableHeader = (const MorphSubtableHeader *) ((char *)subtableHeader + length);
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}
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chainHeader = (const ChainHeader *)((char *)chainHeader + chainLength);
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}
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}
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void MorphSubtableHeader::process(LEGlyphID *glyphs, le_int32 *glyphIndices, le_int32 glyphCount) const
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{
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SubtableProcessor *processor = NULL;
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switch (SWAPW(coverage) & scfTypeMask)
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{
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case mstIndicRearrangement:
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processor = new IndicRearrangementProcessor(this);
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break;
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case mstContextualGlyphSubstitution:
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processor = new ContextualGlyphSubstitutionProcessor(this);
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break;
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case mstLigatureSubstitution:
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processor = new LigatureSubstitutionProcessor(this);
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break;
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case mstReservedUnused:
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break;
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case mstNonContextualGlyphSubstitution:
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processor = NonContextualGlyphSubstitutionProcessor::createInstance(this);
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break;
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/*
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case mstContextualGlyphInsertion:
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processor = new ContextualGlyphInsertionProcessor(this);
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break;
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*/
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default:
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break;
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}
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if (processor != NULL) {
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processor->process(glyphs, glyphIndices, glyphCount);
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delete processor;
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}
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}
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