1ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru/* 2ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 3ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * (C) Copyright IBM Corp. 1998-2004 - All Rights Reserved 4ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 5ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 6ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 7ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru#include "LETypes.h" 8ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru#include "LEGlyphFilter.h" 9ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru#include "OpenTypeTables.h" 10ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru#include "GlyphSubstitutionTables.h" 11ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru#include "AlternateSubstSubtables.h" 12ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru#include "GlyphIterator.h" 13ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru#include "LESwaps.h" 14ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 15ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste QueruU_NAMESPACE_BEGIN 16ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 17ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Querule_uint32 AlternateSubstitutionSubtable::process(GlyphIterator *glyphIterator, const LEGlyphFilter *filter) const 18ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru{ 19ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru // NOTE: For now, we'll just pick the first alternative... 20ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru LEGlyphID glyph = glyphIterator->getCurrGlyphID(); 21ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru le_int32 coverageIndex = getGlyphCoverage(glyph); 22ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 23ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru if (coverageIndex >= 0) { 24ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru le_uint16 altSetCount = SWAPW(alternateSetCount); 25ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 26ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru if (coverageIndex < altSetCount) { 27ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru Offset alternateSetTableOffset = SWAPW(alternateSetTableOffsetArray[coverageIndex]); 28ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru const AlternateSetTable *alternateSetTable = 29ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru (const AlternateSetTable *) ((char *) this + alternateSetTableOffset); 30ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru TTGlyphID alternate = SWAPW(alternateSetTable->alternateArray[0]); 31ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 32ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru if (filter == NULL || filter->accept(LE_SET_GLYPH(glyph, alternate))) { 33ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru glyphIterator->setCurrGlyphID(SWAPW(alternateSetTable->alternateArray[0])); 34ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru } 35ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 36ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru return 1; 37ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru } 38ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 39ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru // XXXX If we get here, the table's mal-formed... 40ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru } 41ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 42ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru return 0; 43ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru} 44ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 45ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste QueruU_NAMESPACE_END 46