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 "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 "GlyphPositioningTables.h"
sl@0: #include "SinglePositioningSubtables.h"
sl@0: #include "PairPositioningSubtables.h"
sl@0: #include "CursiveAttachmentSubtables.h"
sl@0: #include "MarkToBasePosnSubtables.h"
sl@0: #include "MarkToLigaturePosnSubtables.h"
sl@0: #include "MarkToMarkPosnSubtables.h"
sl@0: //#include "ContextualPositioningSubtables.h"
sl@0: #include "ContextualSubstSubtables.h"
sl@0: #include "ExtensionSubtables.h"
sl@0: #include "LookupProcessor.h"
sl@0: #include "GlyphPosnLookupProc.h"
sl@0: #include "LESwaps.h"
sl@0: 
sl@0: U_NAMESPACE_BEGIN
sl@0: 
sl@0: // Aside from the names, the contextual positioning subtables are
sl@0: // the same as the contextual substitution subtables.
sl@0: typedef ContextualSubstitutionSubtable ContextualPositioningSubtable;
sl@0: typedef ChainingContextualSubstitutionSubtable ChainingContextualPositioningSubtable;
sl@0: 
sl@0: GlyphPositioningLookupProcessor::GlyphPositioningLookupProcessor(
sl@0:         const GlyphPositioningTableHeader *glyphPositioningTableHeader,
sl@0:         LETag scriptTag, LETag languageTag, const LETag *featureOrder)
sl@0:     : LookupProcessor(
sl@0:                       (char *) glyphPositioningTableHeader,
sl@0:                       SWAPW(glyphPositioningTableHeader->scriptListOffset),
sl@0:                       SWAPW(glyphPositioningTableHeader->featureListOffset),
sl@0:                       SWAPW(glyphPositioningTableHeader->lookupListOffset),
sl@0:                       scriptTag, languageTag, featureOrder)
sl@0: {
sl@0:     // anything?
sl@0: }
sl@0: 
sl@0: GlyphPositioningLookupProcessor::GlyphPositioningLookupProcessor()
sl@0: {
sl@0: }
sl@0: 
sl@0: le_uint32 GlyphPositioningLookupProcessor::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: 
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 gpstSingle:
sl@0:     {
sl@0:         const SinglePositioningSubtable *subtable = (const SinglePositioningSubtable *) lookupSubtable;
sl@0: 
sl@0:         delta = subtable->process(glyphIterator, fontInstance);
sl@0:         break;
sl@0:     }
sl@0: 
sl@0:     case gpstPair:
sl@0:     {
sl@0:         const PairPositioningSubtable *subtable = (const PairPositioningSubtable *) lookupSubtable;
sl@0: 
sl@0:         delta = subtable->process(glyphIterator, fontInstance);
sl@0:         break;
sl@0:     }
sl@0: 
sl@0:     case gpstCursive:
sl@0:     {
sl@0:         const CursiveAttachmentSubtable *subtable = (const CursiveAttachmentSubtable *) lookupSubtable;
sl@0: 
sl@0:         delta = subtable->process(glyphIterator, fontInstance);
sl@0:         break;
sl@0:     }
sl@0: 
sl@0:     case gpstMarkToBase:
sl@0:     {
sl@0:         const MarkToBasePositioningSubtable *subtable = (const MarkToBasePositioningSubtable *) lookupSubtable;
sl@0: 
sl@0:         delta = subtable->process(glyphIterator, fontInstance);
sl@0:         break;
sl@0:     }
sl@0: 
sl@0:      case gpstMarkToLigature:
sl@0:     {
sl@0:         const MarkToLigaturePositioningSubtable *subtable = (const MarkToLigaturePositioningSubtable *) lookupSubtable;
sl@0: 
sl@0:         delta = subtable->process(glyphIterator, fontInstance);
sl@0:         break;
sl@0:     }
sl@0: 
sl@0:     case gpstMarkToMark:
sl@0:     {
sl@0:         const MarkToMarkPositioningSubtable *subtable = (const MarkToMarkPositioningSubtable *) lookupSubtable;
sl@0: 
sl@0:         delta = subtable->process(glyphIterator, fontInstance);
sl@0:         break;
sl@0:     }
sl@0: 
sl@0:    case gpstContext:
sl@0:     {
sl@0:         const ContextualPositioningSubtable *subtable = (const ContextualPositioningSubtable *) lookupSubtable;
sl@0: 
sl@0:         delta = subtable->process(this, glyphIterator, fontInstance, success);
sl@0:         break;
sl@0:     }
sl@0: 
sl@0:     case gpstChainedContext:
sl@0:     {
sl@0:         const ChainingContextualPositioningSubtable *subtable = (const ChainingContextualPositioningSubtable *) lookupSubtable;
sl@0: 
sl@0:         delta = subtable->process(this, glyphIterator, fontInstance, success);
sl@0:         break;
sl@0:     }
sl@0: 
sl@0:     case gpstExtension:
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: GlyphPositioningLookupProcessor::~GlyphPositioningLookupProcessor()
sl@0: {
sl@0: }
sl@0: 
sl@0: U_NAMESPACE_END