KhmerLayoutEngine.h revision 3171
2362N/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. Oracle designates this 2362N/A * particular file as subject to the "Classpath" exception as provided 0N/A * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 0N/A * (C) Copyright IBM Corp. 1998-2008 - 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 for 0N/A * This class overrides the characterProcessing method to do Khmer character processing 0N/A * and reordering (See the MS spec. for more details) 0N/A * This is the main constructor. It constructs an instance of KhmerOpenTypeLayoutEngine for 0N/A * a particular font, script and language. It takes the GSUB table as a parameter since 0N/A * LayoutEngine::layoutEngineFactory has to read the GSUB table to know that it has an 0N/A * Khmer OpenType font. 0N/A * @param fontInstance - the font 0N/A * @param scriptCode - the script 0N/A * @param langaugeCode - the language 0N/A * @param gsubTable - the GSUB table 0N/A * @param success - set to an error code if the operation fails 0N/A * @see LayoutEngine::layoutEngineFactory 0N/A * @see OpenTypeLayoutEngine 0N/A * This constructor is used when the font requires a "canned" GSUB table which can't be known 0N/A * until after this constructor has been invoked. 0N/A * @param fontInstance - the font 0N/A * @param scriptCode - the script 0N/A * @param langaugeCode - the language 0N/A * @param success - set to an error code if the operation fails 0N/A * @see OpenTypeLayoutEngine * The destructor, virtual for correct polymorphic invocation. * ICU "poor man's RTTI", returns a UClassID for the actual class. * ICU "poor man's RTTI", returns a UClassID for this class. * This method does Khmer OpenType character processing. It assigns the OpenType feature * tags to the characters, and may generate output characters which have been reordered. * It may also split some vowels, resulting in more output characters than input characters. * @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 glyph storage object. The glyph and character index arrays will be set. * the auxillary data array will be set to the feature tags. * @param success - set to an error code if the operation fails * @return the output character count