sl@0: /*
sl@0:  *
sl@0:  * (C) Copyright IBM Corp. 1998-2004 - All Rights Reserved
sl@0:  *
sl@0:  */
sl@0: 
sl@0: #include "LETypes.h"
sl@0: #include "LEGlyphFilter.h"
sl@0: #include "LEFontInstance.h"
sl@0: #include "OpenTypeTables.h"
sl@0: #include "Features.h"
sl@0: #include "Lookups.h"
sl@0: #include "ScriptAndLanguage.h"
sl@0: #include "GlyphDefinitionTables.h"
sl@0: #include "GlyphSubstitutionTables.h"
sl@0: #include "SingleSubstitutionSubtables.h"
sl@0: #include "MultipleSubstSubtables.h"
sl@0: #include "AlternateSubstSubtables.h"
sl@0: #include "LigatureSubstSubtables.h"
sl@0: #include "ContextualSubstSubtables.h"
sl@0: #include "ExtensionSubtables.h"
sl@0: #include "LookupProcessor.h"
sl@0: #include "GlyphSubstLookupProc.h"
sl@0: #include "LESwaps.h"
sl@0: 
sl@0: U_NAMESPACE_BEGIN
sl@0: 
sl@0: GlyphSubstitutionLookupProcessor::GlyphSubstitutionLookupProcessor(
sl@0:         const GlyphSubstitutionTableHeader *glyphSubstitutionTableHeader,
sl@0:         LETag scriptTag, LETag languageTag, const LEGlyphFilter *filter, const LETag *featureOrder)
sl@0:     : LookupProcessor(
sl@0:                       (char *) glyphSubstitutionTableHeader,
sl@0:                       SWAPW(glyphSubstitutionTableHeader->scriptListOffset),
sl@0:                       SWAPW(glyphSubstitutionTableHeader->featureListOffset),
sl@0:                       SWAPW(glyphSubstitutionTableHeader->lookupListOffset),
sl@0:                       scriptTag, languageTag, featureOrder), fFilter(filter)
sl@0: {
sl@0:     // anything?
sl@0: }
sl@0: 
sl@0: GlyphSubstitutionLookupProcessor::GlyphSubstitutionLookupProcessor()
sl@0: {
sl@0: }
sl@0: 
sl@0: le_uint32 GlyphSubstitutionLookupProcessor::applySubtable(
sl@0:     const LookupSubtable *lookupSubtable, le_uint16 lookupType,
sl@0:     GlyphIterator *glyphIterator, const LEFontInstance *fontInstance,
sl@0:     LEErrorCode& success) const
sl@0: {
sl@0:     if (LE_FAILURE(success)) {
sl@0:         return 0;
sl@0:     }
sl@0:     le_uint32 delta = 0;
sl@0: 
sl@0:     switch(lookupType)
sl@0:     {
sl@0:     case 0:
sl@0:         break;
sl@0: 
sl@0:     case gsstSingle:
sl@0:     {
sl@0:         const SingleSubstitutionSubtable *subtable = (const SingleSubstitutionSubtable *) lookupSubtable;
sl@0: 
sl@0:         delta = subtable->process(glyphIterator, fFilter);
sl@0:         break;
sl@0:     }
sl@0: 
sl@0:     case gsstMultiple:
sl@0:     {
sl@0:         const MultipleSubstitutionSubtable *subtable = (const MultipleSubstitutionSubtable *) lookupSubtable;
sl@0: 
sl@0:         delta = subtable->process(glyphIterator, success, fFilter);
sl@0:         break;
sl@0:     }
sl@0: 
sl@0:     case gsstAlternate:
sl@0:     {
sl@0:         const AlternateSubstitutionSubtable *subtable = (const AlternateSubstitutionSubtable *) lookupSubtable;
sl@0: 
sl@0:         delta = subtable->process(glyphIterator, fFilter);
sl@0:         break;
sl@0:     }
sl@0: 
sl@0:     case gsstLigature:
sl@0:     {
sl@0:         const LigatureSubstitutionSubtable *subtable = (const LigatureSubstitutionSubtable *) lookupSubtable;
sl@0: 
sl@0:         delta = subtable->process(glyphIterator, fFilter);
sl@0:         break;
sl@0:     }
sl@0: 
sl@0:     case gsstContext:
sl@0:     {
sl@0:         const ContextualSubstitutionSubtable *subtable = (const ContextualSubstitutionSubtable *) lookupSubtable;
sl@0: 
sl@0:         delta = subtable->process(this, glyphIterator, fontInstance, success);
sl@0:         break;
sl@0:     }
sl@0: 
sl@0:     case gsstChainingContext:
sl@0:     {
sl@0:         const ChainingContextualSubstitutionSubtable *subtable = (const ChainingContextualSubstitutionSubtable *) lookupSubtable;
sl@0: 
sl@0:         delta = subtable->process(this, glyphIterator, fontInstance, success);
sl@0:         break;
sl@0:     }
sl@0: 
sl@0:     case gsstExtension:
sl@0:     {
sl@0:         const ExtensionSubtable *subtable = (const ExtensionSubtable *) lookupSubtable;
sl@0: 
sl@0:         delta = subtable->process(this, lookupType, glyphIterator, fontInstance, success);
sl@0:         break;
sl@0:     }
sl@0: 
sl@0:     default:
sl@0:         break;
sl@0:     }
sl@0: 
sl@0:     return delta;
sl@0: }
sl@0: 
sl@0: GlyphSubstitutionLookupProcessor::~GlyphSubstitutionLookupProcessor()
sl@0: {
sl@0: }
sl@0: 
sl@0: U_NAMESPACE_END