| /* |
| * @(#)AlternateSubstSubtables.cpp 1.7 00/03/15 |
| * |
| * (C) Copyright IBM Corp. 1998, 1999, 2000, 2001 - All Rights Reserved |
| * |
| */ |
| |
| #include "LETypes.h" |
| #include "LEGlyphFilter.h" |
| #include "OpenTypeTables.h" |
| #include "GlyphSubstitutionTables.h" |
| #include "AlternateSubstSubtables.h" |
| #include "GlyphIterator.h" |
| #include "LESwaps.h" |
| |
| U_NAMESPACE_BEGIN |
| |
| le_uint32 AlternateSubstitutionSubtable::process(GlyphIterator *glyphIterator, const LEGlyphFilter *filter) const |
| { |
| // NOTE: For now, we'll just pick the first alternative... |
| LEGlyphID glyph = (LEGlyphID) glyphIterator->getCurrGlyphID(); |
| le_int32 coverageIndex = getGlyphCoverage(glyph); |
| |
| if (coverageIndex >= 0) |
| { |
| le_uint16 altSetCount = SWAPW(alternateSetCount); |
| |
| if (coverageIndex < altSetCount) |
| { |
| Offset alternateSetTableOffset = SWAPW(alternateSetTableOffsetArray[coverageIndex]); |
| const AlternateSetTable *alternateSetTable = |
| (const AlternateSetTable *) ((char *) this + alternateSetTableOffset); |
| LEGlyphID alternate = SWAPW(alternateSetTable->alternateArray[0]); |
| |
| if (filter != NULL || filter->accept(alternate)) { |
| glyphIterator->setCurrGlyphID(SWAPW(alternateSetTable->alternateArray[0])); |
| } |
| |
| return 1; |
| } |
| |
| // XXXX If we get here, the table's mal-formed... |
| } |
| |
| return 0; |
| } |
| |
| U_NAMESPACE_END |
