135 lines
3.7 KiB
C++
135 lines
3.7 KiB
C++
// Copyright (C) 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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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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#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 "ICUFeatures.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 LEReferenceTo<GlyphSubstitutionTableHeader> &glyphSubstitutionTableHeader,
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LETag scriptTag,
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LETag languageTag,
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const LEGlyphFilter *filter,
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const FeatureMap *featureMap,
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le_int32 featureMapCount,
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le_bool featureOrder,
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LEErrorCode& success)
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: LookupProcessor(
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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, featureMap, featureMapCount, featureOrder, success), 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 LEReferenceTo<LookupSubtable> &lookupSubtable, le_uint16 lookupType,
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GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode& success) const
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{
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if (LE_FAILURE(success)) {
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return 0;
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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 LEReferenceTo<SingleSubstitutionSubtable> subtable(lookupSubtable, success);
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delta = subtable->process(subtable, glyphIterator, success, 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 LEReferenceTo<MultipleSubstitutionSubtable> subtable(lookupSubtable, success);
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delta = subtable->process(subtable, glyphIterator, success, 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 LEReferenceTo<AlternateSubstitutionSubtable> subtable(lookupSubtable, success);
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delta = subtable->process(subtable, glyphIterator, success, 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 LEReferenceTo<LigatureSubstitutionSubtable> subtable(lookupSubtable, success);
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delta = subtable->process(subtable, glyphIterator, success, 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 LEReferenceTo<ContextualSubstitutionSubtable> subtable(lookupSubtable, success);
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delta = subtable->process(this, glyphIterator, fontInstance, success);
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break;
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}
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case gsstChainingContext:
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{
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const LEReferenceTo<ChainingContextualSubstitutionSubtable> subtable(lookupSubtable, success);
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delta = subtable->process(this, glyphIterator, fontInstance, success);
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break;
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}
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case gsstExtension:
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{
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const LEReferenceTo<ExtensionSubtable> subtable(lookupSubtable, success);
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delta = subtable->process(this, lookupType, glyphIterator, fontInstance, success);
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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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