3171N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3171N/A * This code is free software; you can redistribute it and/or modify it 3171N/A * under the terms of the GNU General Public License version 2 only, as 3171N/A * published by the Free Software Foundation. Oracle designates this 3171N/A * particular file as subject to the "Classpath" exception as provided 3171N/A * by Oracle in the LICENSE file that accompanied this code. 3171N/A * This code is distributed in the hope that it will be useful, but WITHOUT 3171N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 3171N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 3171N/A * version 2 for more details (a copy is included in the LICENSE file that 3171N/A * You should have received a copy of the GNU General Public License version 3171N/A * 2 along with this work; if not, write to the Free Software Foundation, 3171N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 3171N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 3171N/A * (C) Copyright IBM Corp. 1998-2010 - All Rights Reserved 3171N/A * Developed at DIT - Government of Bhutan 3171N/A * Contact person: Pema Geyleg - <pema_geyleg@druknet.bt> 3171N/A * by Jens Herden and Javier Sola who have given all their possible rights to IBM and the Governement of Bhutan 3171N/A * A first module for Dzongkha was developed by Karunakar under Panlocalisation funding. 3171N/A * Assistance for this module has been received from Namgay Thinley, Christopher Fynn and Javier Sola 3171N/A * This class implements OpenType layout for Dzongkha and Tibetan OpenType fonts 3171N/A * This is the main constructor. It constructs an instance of TibetanOpenTypeLayoutEngine for 3171N/A * a particular font, script and language. It takes the GSUB table as a parameter since 3171N/A * LayoutEngine::layoutEngineFactory has to read the GSUB table to know that it has an 3171N/A * @param fontInstance - the font 3171N/A * @param scriptCode - the script 3171N/A * @param langaugeCode - the language 3171N/A * @param gsubTable - the GSUB table 3171N/A * @param success - set to an error code if the operation fails 3171N/A * @see LayoutEngine::layoutEngineFactory 3171N/A * @see OpenTypeLayoutEngine 3171N/A * This constructor is used when the font requires a "canned" GSUB table which can't be known 3171N/A * until after this constructor has been invoked. 3171N/A * @param fontInstance - the font 3171N/A * @param scriptCode - the script 3171N/A * @param langaugeCode - the language 3171N/A * @param success - set to an error code if the operation fails 3171N/A * @see OpenTypeLayoutEngine 3171N/A * The destructor, virtual for correct polymorphic invocation. 3171N/A * ICU "poor man's RTTI", returns a UClassID for the actual class. 3171N/A * ICU "poor man's RTTI", returns a UClassID for this class. 3171N/A * This method does Tibetan OpenType character processing. It assigns the OpenType feature 3171N/A * tags to the characters, and may generate output characters which have been reordered. 3171N/A * It may also split some vowels, resulting in more output characters than input characters. 3171N/A * @param chars - the input character context 3171N/A * @param offset - the index of the first character to process 3171N/A * @param count - the number of characters to process 3171N/A * @param max - the number of characters in the input context 3171N/A * @param rightToLeft - <code>TRUE</code> if the characters are in a right to left directional run 3171N/A * @param glyphStorage - the glyph storage object. The glyph and character index arrays will be set. 3171N/A * the auxillary data array will be set to the feature tags. 3171N/A * @param success - set to an error code if the operation fails 3171N/A * @return the output character count