KhmerLayoutEngine.h revision 0
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 0N/A * This code is free software; you can redistribute it and/or modify it 0N/A * under the terms of the GNU General Public License version 2 only, as 0N/A * published by the Free Software Foundation. Sun designates this 0N/A * particular file as subject to the "Classpath" exception as provided 0N/A * by Sun in the LICENSE file that accompanied this code. 0N/A * This code is distributed in the hope that it will be useful, but WITHOUT 0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 0N/A * version 2 for more details (a copy is included in the LICENSE file that 0N/A * accompanied this code). 0N/A * You should have received a copy of the GNU General Public License version 0N/A * 2 along with this work; if not, write to the Free Software Foundation, 0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 0N/A * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 0N/A * CA 95054 USA or visit www.sun.com if you need additional information or 0N/A * have any questions. 0N/A * (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved 0N/A * by Jens Herden and Javier Sola for Khmer language 0N/A// class LEGlyphStorage; 0N/A * This class implements OpenType layout for Khmer OpenType fonts, as 0N/A * specified by Microsoft in "Creating and Supporting OpenType Fonts 0N/A * for Khmer Scripts" 0N/A * This class overrides the characterProcessing method to do Khmer 0N/A * character processing and reordering (See the MS spec. for more 0N/A * This is the main constructor. It constructs an instance of 0N/A * KhmerOpenTypeLayoutEngine for a particular font, script and 0N/A * language. It takes the GSUB table as a parameter since 0N/A * LayoutEngine::layoutEngineFactory has to read the GSUB table to 0N/A * know that it has an Khmer OpenType font. 0N/A * @param fontInstance - the font 0N/A * @param scriptCode - the script 0N/A * @param languageCode - the language 0N/A * @param gsubTable - the GSUB table 0N/A * @see LayoutEngine::layoutEngineFactory 0N/A * @see OpenTypeLayoutEngine 0N/A * This constructor is used when the font requires a "canned" GSUB 0N/A * table which can't be known until after this constructor has 0N/A * @param fontInstance - the font 0N/A * @param scriptCode - the script 0N/A * @param langaugeCode - the language 0N/A * @see OpenTypeLayoutEngine 0N/A * The destructor, virtual for correct polymorphic invocation. 0N/A * This method does Khmer OpenType character processing. It 0N/A * assigns the OpenType feature tags to the characters, and may 0N/A * generate output characters which have been reordered. It may 0N/A * also split some vowels, resulting in more output characters 0N/A * than input characters. 0N/A * @param chars - the input character context 0N/A * @param offset - the index of the first character to process 0N/A * @param count - the number of characters to process 0N/A * @param max - the number of characters in the input context 0N/A * @param rightToLeft - <code>TRUE</code> if the characters are in 0N/A * a right to left directional run 0N/A * @param glyphStorage - the glyph storage object. The glyph and 0N/A * character index arrays will be set. the auxillary data array 0N/A * will be set to the feature tags. 0N/A * Output parameters: 0N/A * @param success - set to an error code if the operation fails 0N/A * @return the output character count