HanLayoutEngine.h revision 1693
5286N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5286N/A * This code is free software; you can redistribute it and/or modify it 5286N/A * under the terms of the GNU General Public License version 2 only, as 5286N/A * published by the Free Software Foundation. Sun designates this 5286N/A * particular file as subject to the "Classpath" exception as provided 5286N/A * by Sun in the LICENSE file that accompanied this code. 5286N/A * This code is distributed in the hope that it will be useful, but WITHOUT 5286N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 5286N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 5286N/A * version 2 for more details (a copy is included in the LICENSE file that 5286N/A * You should have received a copy of the GNU General Public License version 5286N/A * 2 along with this work; if not, write to the Free Software Foundation, 5286N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 5286N/A * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 5286N/A * CA 95054 USA or visit www.sun.com if you need additional information or 5853N/A * (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved. 5286N/A * This class implements OpenType layout for Han fonts. It overrides 5286N/A * the characerProcessing method to assign the correct OpenType feature 5286N/A * tags for the CJK language-specific forms. 5286N/A * This is the main constructor. It constructs an instance of HanOpenTypeLayoutEngine for 5286N/A * a particular font, script and language. It takes the GSUB table as a parameter since 5286N/A * LayoutEngine::layoutEngineFactory has to read the GSUB table to know that it has a 5286N/A * @param fontInstance - the font 5286N/A * @param scriptCode - the script 5286N/A * @param langaugeCode - the language 5286N/A * @param gsubTable - the GSUB table 5286N/A * @see LayoutEngine::layoutEngineFactory 5286N/A * @see OpenTypeLayoutEngine 5286N/A * The destructor, virtual for correct polymorphic invocation. 5286N/A * ICU "poor man's RTTI", returns a UClassID for the actual class. 5286N/A * ICU "poor man's RTTI", returns a UClassID for this class. * This method does Han OpenType character processing. It assigns the OpenType feature * tags to the characters to generate the correct language-specific variants. * @param chars - the input character context * @param offset - the index of the first character to process * @param count - the number of characters to process * @param max - the number of characters in the input context * @param rightToLeft - <code>TRUE</code> if the characters are in a right to left directional run * @param glyphStorage - the object holding the glyph storage. The char index and auxillary data arrays will be set. * @param outChars - the output character arrayt * @param charIndices - the output character index array * @param featureTags - the output feature tag array * @param success - set to an error code if the operation fails * @return the output character count