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. 1998-2010 - All Rights Reserved 29 * 30 * Developed at DIT - Government of Bhutan 31 * 32 * Contact person: Pema Geyleg - <pema_geyleg@druknet.bt> 33 * 34 * This file is a modification of the ICU file KhmerReordering.cpp 35 * by Jens Herden and Javier Sola who have given all their possible rights to IBM and the Governement of Bhutan 36 * A first module for Dzongkha was developed by Karunakar under Panlocalisation funding. 37 * Assistance for this module has been received from Namgay Thinley, Christopher Fynn and Javier Sola 38 * 39 */ 40 41 42#include "OpenTypeLayoutEngine.h" 43#include "TibetanLayoutEngine.h" 44#include "LEGlyphStorage.h" 45#include "TibetanReordering.h" 46 47U_NAMESPACE_BEGIN 48 49UOBJECT_DEFINE_RTTI_IMPLEMENTATION(TibetanOpenTypeLayoutEngine) 50 51TibetanOpenTypeLayoutEngine::TibetanOpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode, 52 le_int32 typoFlags, const LEReferenceTo<GlyphSubstitutionTableHeader> &gsubTable, LEErrorCode &success) 53 : OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable, success) 54{ 55 fFeatureMap = TibetanReordering::getFeatureMap(fFeatureMapCount); 56 fFeatureOrder = TRUE; 57} 58 59TibetanOpenTypeLayoutEngine::TibetanOpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode, 60 le_int32 typoFlags, LEErrorCode &success) 61 : OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, success) 62{ 63 fFeatureMap = TibetanReordering::getFeatureMap(fFeatureMapCount); 64 fFeatureOrder = TRUE; 65} 66 67TibetanOpenTypeLayoutEngine::~TibetanOpenTypeLayoutEngine() 68{ 69 // nothing to do 70} 71 72// Input: characters 73// Output: characters, char indices, tags 74// Returns: output character count 75le_int32 TibetanOpenTypeLayoutEngine::characterProcessing(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool rightToLeft, 76 LEUnicode *&outChars, LEGlyphStorage &glyphStorage, LEErrorCode &success) 77{ 78 if (LE_FAILURE(success)) { 79 return 0; 80 } 81 82 if (chars == NULL || offset < 0 || count < 0 || max < 0 || offset >= max || offset + count > max) { 83 success = LE_ILLEGAL_ARGUMENT_ERROR; 84 return 0; 85 } 86 87 le_int32 worstCase = count * 3; // worst case is 3 for Khmer TODO check if 2 is enough 88 89 outChars = LE_NEW_ARRAY(LEUnicode, worstCase); 90 91 if (outChars == NULL) { 92 success = LE_MEMORY_ALLOCATION_ERROR; 93 return 0; 94 } 95 96 glyphStorage.allocateGlyphArray(worstCase, rightToLeft, success); 97 glyphStorage.allocateAuxData(success); 98 99 if (LE_FAILURE(success)) { 100 LE_DELETE_ARRAY(outChars); 101 return 0; 102 } 103 104 // NOTE: assumes this allocates featureTags... 105 // (probably better than doing the worst case stuff here...) 106 le_int32 outCharCount = TibetanReordering::reorder(&chars[offset], count, fScriptCode, outChars, glyphStorage); 107 108 glyphStorage.adoptGlyphCount(outCharCount); 109 return outCharCount; 110} 111 112U_NAMESPACE_END 113