124 lines
3.4 KiB
C++
124 lines
3.4 KiB
C++
/*
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* @(#)GlyphSubstLookupProc.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 "LEGlyphFilter.h"
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#include "LEFontInstance.h"
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#include "OpenTypeTables.h"
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#include "Features.h"
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#include "Lookups.h"
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#include "ScriptAndLanguage.h"
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#include "GlyphDefinitionTables.h"
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#include "GlyphSubstitutionTables.h"
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#include "SingleSubstitutionSubtables.h"
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#include "MultipleSubstSubtables.h"
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#include "AlternateSubstSubtables.h"
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#include "LigatureSubstSubtables.h"
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#include "ContextualSubstSubtables.h"
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#include "ExtensionSubtables.h"
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#include "LookupProcessor.h"
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#include "GlyphSubstLookupProc.h"
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#include "LESwaps.h"
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U_NAMESPACE_BEGIN
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GlyphSubstitutionLookupProcessor::GlyphSubstitutionLookupProcessor(
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const GlyphSubstitutionTableHeader *glyphSubstitutionTableHeader,
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LETag scriptTag, LETag languageTag, const LEGlyphFilter *filter, const LETag *featureOrder)
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: LookupProcessor(
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(char *) glyphSubstitutionTableHeader,
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SWAPW(glyphSubstitutionTableHeader->scriptListOffset),
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SWAPW(glyphSubstitutionTableHeader->featureListOffset),
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SWAPW(glyphSubstitutionTableHeader->lookupListOffset),
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scriptTag, languageTag, featureOrder), fFilter(filter)
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{
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// anything?
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}
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GlyphSubstitutionLookupProcessor::GlyphSubstitutionLookupProcessor()
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{
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}
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le_uint32 GlyphSubstitutionLookupProcessor::applySubtable(const LookupSubtable *lookupSubtable, le_uint16 lookupType,
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GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const
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{
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le_uint32 delta = 0;
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switch(lookupType)
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{
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case 0:
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break;
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case gsstSingle:
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{
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const SingleSubstitutionSubtable *subtable = (const SingleSubstitutionSubtable *) lookupSubtable;
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delta = subtable->process(glyphIterator, fFilter);
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break;
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}
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case gsstMultiple:
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{
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const MultipleSubstitutionSubtable *subtable = (const MultipleSubstitutionSubtable *) lookupSubtable;
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delta = subtable->process(glyphIterator, fFilter);
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break;
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}
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case gsstAlternate:
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{
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const AlternateSubstitutionSubtable *subtable = (const AlternateSubstitutionSubtable *) lookupSubtable;
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delta = subtable->process(glyphIterator, fFilter);
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break;
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}
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case gsstLigature:
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{
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const LigatureSubstitutionSubtable *subtable = (const LigatureSubstitutionSubtable *) lookupSubtable;
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delta = subtable->process(glyphIterator, fFilter);
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break;
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}
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case gsstContext:
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{
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const ContextualSubstitutionSubtable *subtable = (const ContextualSubstitutionSubtable *) lookupSubtable;
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delta = subtable->process(this, glyphIterator, fontInstance);
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break;
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}
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case gsstChainingContext:
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{
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const ChainingContextualSubstitutionSubtable *subtable = (const ChainingContextualSubstitutionSubtable *) lookupSubtable;
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delta = subtable->process(this, glyphIterator, fontInstance);
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break;
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}
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case gsstExtension:
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{
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const ExtensionSubtable *subtable = (const ExtensionSubtable *) lookupSubtable;
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delta = subtable->process(this, lookupType, glyphIterator, fontInstance);
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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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return delta;
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}
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GlyphSubstitutionLookupProcessor::~GlyphSubstitutionLookupProcessor()
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{
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}
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U_NAMESPACE_END
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