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/*
* @(#)GlyphSubstLookupProc.cpp 1.6 00/03/15
*
* (C) Copyright IBM Corp. 1998, 1999, 2000, 2001 - All Rights Reserved
*
*/
#include "LETypes.h"
#include "LEGlyphFilter.h"
#include "LEFontInstance.h"
#include "OpenTypeTables.h"
#include "Features.h"
#include "Lookups.h"
#include "ScriptAndLanguage.h"
#include "GlyphDefinitionTables.h"
#include "GlyphSubstitutionTables.h"
#include "SingleSubstitutionSubtables.h"
#include "MultipleSubstSubtables.h"
#include "AlternateSubstSubtables.h"
#include "LigatureSubstSubtables.h"
#include "ContextualSubstSubtables.h"
#include "LookupProcessor.h"
#include "GlyphSubstLookupProc.h"
#include "LESwaps.h"
U_NAMESPACE_BEGIN
GlyphSubstitutionLookupProcessor::GlyphSubstitutionLookupProcessor(
const GlyphSubstitutionTableHeader *glyphSubstitutionTableHeader,
LETag scriptTag, LETag languageTag, const LEGlyphFilter *filter, const LETag *featureOrder)
: LookupProcessor(
(char *) glyphSubstitutionTableHeader,
SWAPW(glyphSubstitutionTableHeader->scriptListOffset),
SWAPW(glyphSubstitutionTableHeader->featureListOffset),
SWAPW(glyphSubstitutionTableHeader->lookupListOffset),
scriptTag, languageTag, featureOrder), fFilter(filter)
{
// anything?
}
GlyphSubstitutionLookupProcessor::GlyphSubstitutionLookupProcessor()
{
}
le_uint32 GlyphSubstitutionLookupProcessor::applySubtable(const LookupSubtable *lookupSubtable, le_uint16 lookupType,
GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const
{
le_uint32 delta = 0;
switch(lookupType)
{
case 0:
break;
case gsstSingle:
{
const SingleSubstitutionSubtable *subtable = (const SingleSubstitutionSubtable *) lookupSubtable;
delta = subtable->process(glyphIterator, fFilter);
break;
}
case gsstMultiple:
{
const MultipleSubstitutionSubtable *subtable = (const MultipleSubstitutionSubtable *) lookupSubtable;
delta = subtable->process(glyphIterator, fFilter);
break;
}
case gsstAlternate:
{
const AlternateSubstitutionSubtable *subtable = (const AlternateSubstitutionSubtable *) lookupSubtable;
delta = subtable->process(glyphIterator, fFilter);
break;
}
case gsstLigature:
{
const LigatureSubstitutionSubtable *subtable = (const LigatureSubstitutionSubtable *) lookupSubtable;
delta = subtable->process(glyphIterator, fFilter);
break;
}
case gsstContext:
{
const ContextualSubstitutionSubtable *subtable = (const ContextualSubstitutionSubtable *) lookupSubtable;
delta = subtable->process(this, glyphIterator, fontInstance);
break;
}
case gsstChainingContext:
{
const ChainingContextualSubstitutionSubtable *subtable = (const ChainingContextualSubstitutionSubtable *) lookupSubtable;
delta = subtable->process(this, glyphIterator, fontInstance);
break;
}
default:
break;
}
return delta;
}
GlyphSubstitutionLookupProcessor::~GlyphSubstitutionLookupProcessor()
{
}
U_NAMESPACE_END
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