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/*
* @(#)GlyphPosnLookupProc.cpp 1.6 00/03/15
*
* (C) Copyright IBM Corp. 1998, 1999, 2000, 2001 - All Rights Reserved
*
*/
#include "LETypes.h"
#include "LEFontInstance.h"
#include "OpenTypeTables.h"
#include "Features.h"
#include "Lookups.h"
#include "ScriptAndLanguage.h"
#include "GlyphDefinitionTables.h"
#include "GlyphPositioningTables.h"
#include "SinglePositioningSubtables.h"
#include "PairPositioningSubtables.h"
//#include "CursivePositioningSubtables.h"
#include "MarkToBasePosnSubtables.h"
#include "MarkToLigaturePosnSubtables.h"
#include "MarkToMarkPosnSubtables.h"
//#include "ContextualPositioningSubtables.h"
#include "ContextualSubstSubtables.h"
#include "LookupProcessor.h"
#include "GlyphPosnLookupProc.h"
#include "LESwaps.h"
U_NAMESPACE_BEGIN
// Aside from the names, the contextual positioning subtables are
// the same as the contextual substitution subtables.
typedef ContextualSubstitutionSubtable ContextualPositioningSubtable;
typedef ChainingContextualSubstitutionSubtable ChainingContextualPositioningSubtable;
GlyphPositioningLookupProcessor::GlyphPositioningLookupProcessor(
const GlyphPositioningTableHeader *glyphPositioningTableHeader,
LETag scriptTag, LETag languageTag, const LETag *featureOrder)
: LookupProcessor(
(char *) glyphPositioningTableHeader,
SWAPW(glyphPositioningTableHeader->scriptListOffset),
SWAPW(glyphPositioningTableHeader->featureListOffset),
SWAPW(glyphPositioningTableHeader->lookupListOffset),
scriptTag, languageTag, featureOrder)
{
// anything?
}
GlyphPositioningLookupProcessor::GlyphPositioningLookupProcessor()
{
}
le_uint32 GlyphPositioningLookupProcessor::applySubtable(const LookupSubtable *lookupSubtable, le_uint16 lookupType,
GlyphIterator *glyphIterator,
const LEFontInstance *fontInstance) const
{
le_uint32 delta = 0;
switch(lookupType)
{
case 0:
break;
case gpstSingle:
{
const SinglePositioningSubtable *subtable = (const SinglePositioningSubtable *) lookupSubtable;
delta = subtable->process(glyphIterator, fontInstance);
break;
}
case gpstPair:
{
const PairPositioningSubtable *subtable = (const PairPositioningSubtable *) lookupSubtable;
delta = subtable->process(glyphIterator, fontInstance);
break;
}
#if 0
case gpstCursive:
{
const CursivePositioningSubtable *subtable = (const CursivePositioningSubtable *) lookupSubtable;
delta = subtable->process(glyphIterator, fontInstance);
break;
}
#endif
case gpstMarkToBase:
{
const MarkToBasePositioningSubtable *subtable = (const MarkToBasePositioningSubtable *) lookupSubtable;
delta = subtable->process(glyphIterator, fontInstance);
break;
}
case gpstMarkToLigature:
{
const MarkToLigaturePositioningSubtable *subtable = (const MarkToLigaturePositioningSubtable *) lookupSubtable;
delta = subtable->process(glyphIterator, fontInstance);
break;
}
case gpstMarkToMark:
{
const MarkToMarkPositioningSubtable *subtable = (const MarkToMarkPositioningSubtable *) lookupSubtable;
delta = subtable->process(glyphIterator, fontInstance);
break;
}
case gpstContext:
{
const ContextualPositioningSubtable *subtable = (const ContextualPositioningSubtable *) lookupSubtable;
delta = subtable->process(this, glyphIterator, fontInstance);
break;
}
case gpstChainedContext:
{
const ChainingContextualPositioningSubtable *subtable = (const ChainingContextualPositioningSubtable *) lookupSubtable;
delta = subtable->process(this, glyphIterator, fontInstance);
break;
}
default:
break;
}
return delta;
}
GlyphPositioningLookupProcessor::~GlyphPositioningLookupProcessor()
{
}
U_NAMESPACE_END
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