| /* |
| * (C) Copyright IBM Corp. 1998-2006 - All Rights Reserved |
| * |
| */ |
| |
| #include "LETypes.h" |
| #include "LEGlyphFilter.h" |
| #include "OpenTypeTables.h" |
| #include "GlyphSubstitutionTables.h" |
| #include "LigatureSubstSubtables.h" |
| #include "GlyphIterator.h" |
| #include "LESwaps.h" |
| |
| U_NAMESPACE_BEGIN |
| |
| le_uint32 LigatureSubstitutionSubtable::process(GlyphIterator *glyphIterator, const LEGlyphFilter *filter) const |
| { |
| LEGlyphID glyph = glyphIterator->getCurrGlyphID(); |
| le_int32 coverageIndex = getGlyphCoverage(glyph); |
| |
| if (coverageIndex >= 0) { |
| Offset ligSetTableOffset = SWAPW(ligSetTableOffsetArray[coverageIndex]); |
| const LigatureSetTable *ligSetTable = (const LigatureSetTable *) ((char *) this + ligSetTableOffset); |
| le_uint16 ligCount = SWAPW(ligSetTable->ligatureCount); |
| |
| for (le_uint16 lig = 0; lig < ligCount; lig += 1) { |
| Offset ligTableOffset = SWAPW(ligSetTable->ligatureTableOffsetArray[lig]); |
| const LigatureTable *ligTable = (const LigatureTable *) ((char *)ligSetTable + ligTableOffset); |
| le_uint16 compCount = SWAPW(ligTable->compCount) - 1; |
| le_int32 startPosition = glyphIterator->getCurrStreamPosition(); |
| TTGlyphID ligGlyph = SWAPW(ligTable->ligGlyph); |
| le_uint16 comp; |
| |
| for (comp = 0; comp < compCount; comp += 1) { |
| if (! glyphIterator->next()) { |
| break; |
| } |
| |
| if (LE_GET_GLYPH(glyphIterator->getCurrGlyphID()) != SWAPW(ligTable->componentArray[comp])) { |
| break; |
| } |
| } |
| |
| if (comp == compCount && (filter == NULL || filter->accept(LE_SET_GLYPH(glyph, ligGlyph)))) { |
| GlyphIterator tempIterator(*glyphIterator); |
| TTGlyphID deletedGlyph = tempIterator.ignoresMarks()? 0xFFFE : 0xFFFF; |
| |
| while (comp > 0) { |
| tempIterator.setCurrGlyphID(deletedGlyph); |
| tempIterator.prev(); |
| |
| comp -= 1; |
| } |
| |
| tempIterator.setCurrGlyphID(ligGlyph); |
| |
| return compCount + 1; |
| } |
| |
| glyphIterator->setCurrStreamPosition(startPosition); |
| } |
| |
| } |
| |
| return 0; |
| } |
| |
| U_NAMESPACE_END |
