162 lines
4.6 KiB
C++
162 lines
4.6 KiB
C++
/*
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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 "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 "GlyphPositioningTables.h"
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#include "SinglePositioningSubtables.h"
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#include "PairPositioningSubtables.h"
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#include "CursiveAttachmentSubtables.h"
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#include "MarkToBasePosnSubtables.h"
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#include "MarkToLigaturePosnSubtables.h"
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#include "MarkToMarkPosnSubtables.h"
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//#include "ContextualPositioningSubtables.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 "GlyphPosnLookupProc.h"
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#include "LESwaps.h"
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U_NAMESPACE_BEGIN
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// Aside from the names, the contextual positioning subtables are
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// the same as the contextual substitution subtables.
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typedef ContextualSubstitutionSubtable ContextualPositioningSubtable;
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typedef ChainingContextualSubstitutionSubtable ChainingContextualPositioningSubtable;
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GlyphPositioningLookupProcessor::GlyphPositioningLookupProcessor(
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const LEReferenceTo<GlyphPositioningTableHeader> &glyphPositioningTableHeader,
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LETag scriptTag,
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LETag languageTag,
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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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glyphPositioningTableHeader,
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SWAPW(glyphPositioningTableHeader->scriptListOffset),
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SWAPW(glyphPositioningTableHeader->featureListOffset),
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SWAPW(glyphPositioningTableHeader->lookupListOffset),
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scriptTag,
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languageTag,
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featureMap,
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featureMapCount,
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featureOrder,
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success
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)
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{
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// anything?
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}
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GlyphPositioningLookupProcessor::GlyphPositioningLookupProcessor()
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{
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}
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le_uint32 GlyphPositioningLookupProcessor::applySubtable(const LEReferenceTo<LookupSubtable> &lookupSubtable, le_uint16 lookupType,
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GlyphIterator *glyphIterator,
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const LEFontInstance *fontInstance,
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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 gpstSingle:
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{
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LEReferenceTo<SinglePositioningSubtable> subtable(lookupSubtable, success);
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delta = subtable->process(subtable, glyphIterator, fontInstance, success);
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break;
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}
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case gpstPair:
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{
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LEReferenceTo<PairPositioningSubtable> subtable(lookupSubtable, success);
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delta = subtable->process(subtable, glyphIterator, fontInstance, success);
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break;
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}
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case gpstCursive:
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{
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LEReferenceTo<CursiveAttachmentSubtable> subtable(lookupSubtable, success);
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delta = subtable->process(subtable, glyphIterator, fontInstance, success);
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break;
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}
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case gpstMarkToBase:
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{
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LEReferenceTo<MarkToBasePositioningSubtable> subtable(lookupSubtable, success);
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delta = subtable->process(subtable, glyphIterator, fontInstance, success);
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break;
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}
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case gpstMarkToLigature:
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{
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LEReferenceTo<MarkToLigaturePositioningSubtable> subtable(lookupSubtable, success);
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delta = subtable->process(subtable, glyphIterator, fontInstance, success);
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break;
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}
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case gpstMarkToMark:
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{
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LEReferenceTo<MarkToMarkPositioningSubtable> subtable(lookupSubtable, success);
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delta = subtable->process(subtable, glyphIterator, fontInstance, success);
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break;
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}
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case gpstContext:
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{
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LEReferenceTo<ContextualPositioningSubtable> 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 gpstChainedContext:
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{
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LEReferenceTo<ChainingContextualPositioningSubtable> 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 gpstExtension:
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{
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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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GlyphPositioningLookupProcessor::~GlyphPositioningLookupProcessor()
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{
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}
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U_NAMESPACE_END
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