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/*
* (C) Copyright IBM Corp. 1998 - 2013 - All Rights Reserved
*
*/
#include "LETypes.h"
#include "LEFontInstance.h"
#include "OpenTypeTables.h"
#include "ICUFeatures.h"
#include "Lookups.h"
#include "ScriptAndLanguage.h"
#include "GlyphDefinitionTables.h"
#include "GlyphPositioningTables.h"
#include "SinglePositioningSubtables.h"
#include "PairPositioningSubtables.h"
#include "CursiveAttachmentSubtables.h"
#include "MarkToBasePosnSubtables.h"
#include "MarkToLigaturePosnSubtables.h"
#include "MarkToMarkPosnSubtables.h"
//#include "ContextualPositioningSubtables.h"
#include "ContextualSubstSubtables.h"
#include "ExtensionSubtables.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 LEReferenceTo<GlyphPositioningTableHeader> &glyphPositioningTableHeader,
LETag scriptTag,
LETag languageTag,
const FeatureMap *featureMap,
le_int32 featureMapCount,
le_bool featureOrder,
LEErrorCode& success)
: LookupProcessor(
glyphPositioningTableHeader,
SWAPW(glyphPositioningTableHeader->scriptListOffset),
SWAPW(glyphPositioningTableHeader->featureListOffset),
SWAPW(glyphPositioningTableHeader->lookupListOffset),
scriptTag,
languageTag,
featureMap,
featureMapCount,
featureOrder,
success
)
{
// anything?
}
GlyphPositioningLookupProcessor::GlyphPositioningLookupProcessor()
{
}
le_uint32 GlyphPositioningLookupProcessor::applySubtable(const LEReferenceTo<LookupSubtable> &lookupSubtable, le_uint16 lookupType,
GlyphIterator *glyphIterator,
const LEFontInstance *fontInstance,
LEErrorCode& success) const
{
if (LE_FAILURE(success)) {
return 0;
}
le_uint32 delta = 0;
switch(lookupType)
{
case 0:
break;
case gpstSingle:
{
LEReferenceTo<SinglePositioningSubtable> subtable(lookupSubtable, success);
delta = subtable->process(subtable, glyphIterator, fontInstance, success);
break;
}
case gpstPair:
{
LEReferenceTo<PairPositioningSubtable> subtable(lookupSubtable, success);
delta = subtable->process(subtable, glyphIterator, fontInstance, success);
break;
}
case gpstCursive:
{
LEReferenceTo<CursiveAttachmentSubtable> subtable(lookupSubtable, success);
delta = subtable->process(subtable, glyphIterator, fontInstance, success);
break;
}
case gpstMarkToBase:
{
LEReferenceTo<MarkToBasePositioningSubtable> subtable(lookupSubtable, success);
delta = subtable->process(subtable, glyphIterator, fontInstance, success);
break;
}
case gpstMarkToLigature:
{
LEReferenceTo<MarkToLigaturePositioningSubtable> subtable(lookupSubtable, success);
delta = subtable->process(subtable, glyphIterator, fontInstance, success);
break;
}
case gpstMarkToMark:
{
LEReferenceTo<MarkToMarkPositioningSubtable> subtable(lookupSubtable, success);
delta = subtable->process(subtable, glyphIterator, fontInstance, success);
break;
}
case gpstContext:
{
LEReferenceTo<ContextualPositioningSubtable> subtable(lookupSubtable, success);
delta = subtable->process(this, glyphIterator, fontInstance, success);
break;
}
case gpstChainedContext:
{
LEReferenceTo<ChainingContextualPositioningSubtable> subtable(lookupSubtable, success);
delta = subtable->process(this, glyphIterator, fontInstance, success);
break;
}
case gpstExtension:
{
LEReferenceTo<ExtensionSubtable> subtable(lookupSubtable, success);
delta = subtable->process(this, lookupType, glyphIterator, fontInstance, success);
break;
}
default:
break;
}
return delta;
}
GlyphPositioningLookupProcessor::~GlyphPositioningLookupProcessor()
{
}
U_NAMESPACE_END
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