1ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru/* 2ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 359d709d503bab6e2b61931737e662dd293b40578ccornelius * (C) Copyright IBM Corp. 1998-2013 - All Rights Reserved 4ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 5ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Developed at DIT - Government of Bhutan 6ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 7ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Contact person: Pema Geyleg - <pema_geyleg@druknet.bt> 8ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 9ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * This file is a modification of the ICU file KhmerReordering.cpp 10ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * by Jens Herden and Javier Sola who have given all their possible rights to IBM and the Governement of Bhutan 11ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * A first module for Dzongkha was developed by Karunakar under Panlocalisation funding. 12ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Assistance for this module has been received from Namgay Thinley, Christopher Fynn and Javier Sola 13ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 14ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 15ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 16ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru#ifndef __TIBETANLAYOUTENGINE_H 17ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru#define __TIBETANLAYOUTENGINE_H 18ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 19ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru// #include "LETypes.h" 20ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru// #include "LEFontInstance.h" 21ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru// #include "LEGlyphFilter.h" 22ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru// #include "LayoutEngine.h" 23ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru// #include "OpenTypeLayoutEngine.h" 24ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 25ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru// #include "GlyphSubstitutionTables.h" 26ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru// #include "GlyphDefinitionTables.h" 27ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru// #include "GlyphPositioningTables.h" 28ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 29ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste QueruU_NAMESPACE_BEGIN 30ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 31ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru// class MPreFixups; 32ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru// class LEGlyphStorage; 33ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 34ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru/** 35ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * This class implements OpenType layout for Dzongkha and Tibetan OpenType fonts 36ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 37ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 38ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 39ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queruclass TibetanOpenTypeLayoutEngine : public OpenTypeLayoutEngine 40ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru{ 41ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Querupublic: 42ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 43ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * This is the main constructor. It constructs an instance of TibetanOpenTypeLayoutEngine for 44ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * a particular font, script and language. It takes the GSUB table as a parameter since 45ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * LayoutEngine::layoutEngineFactory has to read the GSUB table to know that it has an 46ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Tibetan OpenType font. 47ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 48ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @param fontInstance - the font 49ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @param scriptCode - the script 50ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @param langaugeCode - the language 51ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @param gsubTable - the GSUB table 5285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param success - set to an error code if the operation fails 53ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 54ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @see LayoutEngine::layoutEngineFactory 55ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @see OpenTypeLayoutEngine 56ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @see ScriptAndLangaugeTags.h for script and language codes 57ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 58ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 59ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 60ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru TibetanOpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode, 6159d709d503bab6e2b61931737e662dd293b40578ccornelius le_int32 typoFlags, const LEReferenceTo<GlyphSubstitutionTableHeader> &gsubTable, LEErrorCode &success); 62ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 63ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 64ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * This constructor is used when the font requires a "canned" GSUB table which can't be known 65ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * until after this constructor has been invoked. 66ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 67ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @param fontInstance - the font 68ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @param scriptCode - the script 69ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @param langaugeCode - the language 7085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param success - set to an error code if the operation fails 71ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 72ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @see OpenTypeLayoutEngine 73ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @see ScriptAndLangaugeTags.h for script and language codes 74ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 75ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 76ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 77ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru TibetanOpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode, 7885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho le_int32 typoFlags, LEErrorCode &success); 79ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 80ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 81ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * The destructor, virtual for correct polymorphic invocation. 82ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 83ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 84ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 85ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru virtual ~TibetanOpenTypeLayoutEngine(); 86ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 87ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 88ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * ICU "poor man's RTTI", returns a UClassID for the actual class. 89ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 90ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal ICU 3.6 91ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 92ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru virtual UClassID getDynamicClassID() const; 93ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 94ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 95ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * ICU "poor man's RTTI", returns a UClassID for this class. 96ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 97ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal ICU 3.6 98ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 99ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru static UClassID getStaticClassID(); 100ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 101ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queruprotected: 102ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 103ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru /** 104ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * This method does Tibetan OpenType character processing. It assigns the OpenType feature 105ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * tags to the characters, and may generate output characters which have been reordered. 106ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * It may also split some vowels, resulting in more output characters than input characters. 107ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 108ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Input parameters: 109ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @param chars - the input character context 110ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @param offset - the index of the first character to process 111ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @param count - the number of characters to process 112ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @param max - the number of characters in the input context 113ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @param rightToLeft - <code>TRUE</code> if the characters are in a right to left directional run 114ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @param glyphStorage - the glyph storage object. The glyph and character index arrays will be set. 115ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * the auxillary data array will be set to the feature tags. 116ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 117ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * Output parameters: 118ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @param success - set to an error code if the operation fails 119ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 120ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @return the output character count 121ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 122ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * @internal 123ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 124ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru virtual le_int32 characterProcessing(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool rightToLeft, 125ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru LEUnicode *&outChars, LEGlyphStorage &glyphStorage, LEErrorCode &success); 126ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 127ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru}; 128ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 129ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste QueruU_NAMESPACE_END 130ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru#endif 131ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 132