1 /* 2 * 3 * (C) Copyright IBM Corp. 1998-2004 - All Rights Reserved 4 * 5 */ 6 7 #include "LETypes.h" 8 #include "LEGlyphFilter.h" 9 #include "OpenTypeTables.h" 10 #include "GlyphSubstitutionTables.h" 11 #include "AlternateSubstSubtables.h" 12 #include "GlyphIterator.h" 13 #include "LESwaps.h" 14 15 U_NAMESPACE_BEGIN 16 17 le_uint32 AlternateSubstitutionSubtable::process(GlyphIterator *glyphIterator, const LEGlyphFilter *filter) const 18 { 19 // NOTE: For now, we'll just pick the first alternative... 20 LEGlyphID glyph = glyphIterator->getCurrGlyphID(); 21 le_int32 coverageIndex = getGlyphCoverage(glyph); 22 23 if (coverageIndex >= 0) { 24 le_uint16 altSetCount = SWAPW(alternateSetCount); 25 26 if (coverageIndex < altSetCount) { 27 Offset alternateSetTableOffset = SWAPW(alternateSetTableOffsetArray[coverageIndex]); 28 const AlternateSetTable *alternateSetTable = 29 (const AlternateSetTable *) ((char *) this + alternateSetTableOffset); 30 TTGlyphID alternate = SWAPW(alternateSetTable->alternateArray[0]); 31 32 if (filter == NULL || filter->accept(LE_SET_GLYPH(glyph, alternate))) { 33 glyphIterator->setCurrGlyphID(SWAPW(alternateSetTable->alternateArray[0])); 34 } 35 36 return 1; 37 } 38 39 // XXXX If we get here, the table's mal-formed... 40 } 41 42 return 0; 43 } 44 45 U_NAMESPACE_END 46
