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 "OpenTypeTables.h"
sl@0: #include "GlyphSubstitutionTables.h"
sl@0: #include "AlternateSubstSubtables.h"
sl@0: #include "GlyphIterator.h"
sl@0: #include "LESwaps.h"
sl@0: 
sl@0: U_NAMESPACE_BEGIN
sl@0: 
sl@0: le_uint32 AlternateSubstitutionSubtable::process(GlyphIterator *glyphIterator, const LEGlyphFilter *filter) const
sl@0: {
sl@0:     // NOTE: For now, we'll just pick the first alternative...
sl@0:     LEGlyphID glyph = glyphIterator->getCurrGlyphID();
sl@0:     le_int32 coverageIndex = getGlyphCoverage(glyph);
sl@0: 
sl@0:     if (coverageIndex >= 0) {
sl@0:         le_uint16 altSetCount = SWAPW(alternateSetCount);
sl@0: 
sl@0:         if (coverageIndex < altSetCount) {
sl@0:             Offset alternateSetTableOffset = SWAPW(alternateSetTableOffsetArray[coverageIndex]);
sl@0:             const AlternateSetTable *alternateSetTable =
sl@0:                 (const AlternateSetTable *) ((char *) this + alternateSetTableOffset);
sl@0:             TTGlyphID alternate = SWAPW(alternateSetTable->alternateArray[0]);
sl@0: 
sl@0:             if (filter == NULL || filter->accept(LE_SET_GLYPH(glyph, alternate))) {
sl@0:                 glyphIterator->setCurrGlyphID(SWAPW(alternateSetTable->alternateArray[0]));
sl@0:             }
sl@0:             
sl@0:             return 1;
sl@0:         }
sl@0: 
sl@0:         // XXXX If we get here, the table's mal-formed...
sl@0:     }
sl@0: 
sl@0:     return 0;
sl@0: }
sl@0: 
sl@0: U_NAMESPACE_END