1/* 2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * 4 * This code is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License version 2 only, as 6 * published by the Free Software Foundation. Oracle designates this 7 * particular file as subject to the "Classpath" exception as provided 8 * by Oracle in the LICENSE file that accompanied this code. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26/* 27 * 28 * (C) Copyright IBM Corp. 1998-2004 - All Rights Reserved 29 * 30 */ 31 32#include "LETypes.h" 33#include "LEGlyphFilter.h" 34#include "OpenTypeTables.h" 35#include "GlyphSubstitutionTables.h" 36#include "AlternateSubstSubtables.h" 37#include "GlyphIterator.h" 38#include "LESwaps.h" 39 40U_NAMESPACE_BEGIN 41 42le_uint32 AlternateSubstitutionSubtable::process(const LEReferenceTo<AlternateSubstitutionSubtable> &base, 43 GlyphIterator *glyphIterator, LEErrorCode &success, const LEGlyphFilter *filter) const 44{ 45 // NOTE: For now, we'll just pick the first alternative... 46 LEGlyphID glyph = glyphIterator->getCurrGlyphID(); 47 le_int32 coverageIndex = getGlyphCoverage(base, glyph, success); 48 49 if (coverageIndex >= 0 && LE_SUCCESS(success)) { 50 le_uint16 altSetCount = SWAPW(alternateSetCount); 51 52 if (coverageIndex < altSetCount) { 53 Offset alternateSetTableOffset = SWAPW(alternateSetTableOffsetArray[coverageIndex]); 54 const LEReferenceTo<AlternateSetTable> alternateSetTable(base, success, 55 (const AlternateSetTable *) ((char *) this + alternateSetTableOffset)); 56 if (!LE_SUCCESS(success)) return 0; 57 TTGlyphID alternate = SWAPW(alternateSetTable->alternateArray[0]); 58 59 if (filter == NULL || filter->accept(LE_SET_GLYPH(glyph, alternate), success)) { 60 glyphIterator->setCurrGlyphID(SWAPW(alternateSetTable->alternateArray[0])); 61 } 62 63 return 1; 64 } 65 66 // XXXX If we get here, the table's mal-formed... 67 } 68 69 return 0; 70} 71 72U_NAMESPACE_END 73