139 lines
4.0 KiB
C++
139 lines
4.0 KiB
C++
/*
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* @(#)GlyphPosnLookupProc.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 "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 "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 "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 GlyphPositioningTableHeader *glyphPositioningTableHeader,
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LETag scriptTag, LETag languageTag, const LETag *featureOrder)
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: LookupProcessor(
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(char *) 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, languageTag, featureOrder)
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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 LookupSubtable *lookupSubtable, le_uint16 lookupType,
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GlyphIterator *glyphIterator,
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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 gpstSingle:
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{
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const SinglePositioningSubtable *subtable = (const SinglePositioningSubtable *) lookupSubtable;
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delta = subtable->process(glyphIterator, fontInstance);
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break;
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}
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case gpstPair:
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{
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const PairPositioningSubtable *subtable = (const PairPositioningSubtable *) lookupSubtable;
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delta = subtable->process(glyphIterator, fontInstance);
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break;
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}
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case gpstCursive:
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{
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const CursiveAttachmentSubtable *subtable = (const CursiveAttachmentSubtable *) lookupSubtable;
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delta = subtable->process(glyphIterator, fontInstance);
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break;
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}
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case gpstMarkToBase:
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{
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const MarkToBasePositioningSubtable *subtable = (const MarkToBasePositioningSubtable *) lookupSubtable;
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delta = subtable->process(glyphIterator, fontInstance);
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break;
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}
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case gpstMarkToLigature:
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{
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const MarkToLigaturePositioningSubtable *subtable = (const MarkToLigaturePositioningSubtable *) lookupSubtable;
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delta = subtable->process(glyphIterator, fontInstance);
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break;
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}
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case gpstMarkToMark:
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{
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const MarkToMarkPositioningSubtable *subtable = (const MarkToMarkPositioningSubtable *) lookupSubtable;
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delta = subtable->process(glyphIterator, fontInstance);
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break;
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}
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case gpstContext:
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{
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const ContextualPositioningSubtable *subtable = (const ContextualPositioningSubtable *) 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 gpstChainedContext:
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{
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const ChainingContextualPositioningSubtable *subtable = (const ChainingContextualPositioningSubtable *) lookupSubtable;
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delta = subtable->process(this, 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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GlyphPositioningLookupProcessor::~GlyphPositioningLookupProcessor()
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{
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}
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U_NAMESPACE_END
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