| /* |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| /* |
| * |
| * (C) Copyright IBM Corp. and others 1998-2013 - All Rights Reserved |
| * |
| */ |
| |
| #ifndef __GXLAYOUTENGINE2_H |
| #define __GXLAYOUTENGINE2_H |
| |
| #include "LETypes.h" |
| #include "LayoutEngine.h" |
| |
| #include "MorphTables.h" |
| |
| U_NAMESPACE_BEGIN |
| |
| class LEFontInstance; |
| class LEGlyphStorage; |
| |
| /** |
| * This class implements layout for QuickDraw GX or Apple Advanced Typograyph (AAT) |
| * fonts. A font is a GX or AAT font if it contains a 'mort' table. See Apple's |
| * TrueType Reference Manual (http://fonts.apple.com/TTRefMan/index.html) for details. |
| * Information about 'mort' tables is in the chapter titled "Font Files." |
| * |
| * @internal |
| */ |
| class GXLayoutEngine2 : public LayoutEngine |
| { |
| public: |
| /** |
| * This is the main constructor. It constructs an instance of GXLayoutEngine for |
| * a particular font, script and language. It takes the 'mort' table as a parameter since |
| * LayoutEngine::layoutEngineFactory has to read the 'mort' table to know that it has a |
| * GX font. |
| * |
| * Note: GX and AAT fonts don't contain any script and language specific tables, so |
| * the script and language are ignored. |
| * |
| * @param fontInstance - the font |
| * @param scriptCode - the script |
| * @param langaugeCode - the language |
| * @param morphTable - the 'mort' table |
| * @param success - set to an error code if the operation fails |
| * |
| * @see LayoutEngine::layoutEngineFactory |
| * @see ScriptAndLangaugeTags.h for script and language codes |
| * |
| * @internal |
| */ |
| GXLayoutEngine2(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode, const LEReferenceTo<MorphTableHeader2> &morphTable, le_int32 typoFlags, LEErrorCode &success); |
| |
| /** |
| * The destructor, virtual for correct polymorphic invocation. |
| * |
| * @internal |
| */ |
| virtual ~GXLayoutEngine2(); |
| |
| /** |
| * ICU "poor man's RTTI", returns a UClassID for the actual class. |
| * |
| * @stable ICU 2.8 |
| */ |
| virtual UClassID getDynamicClassID() const; |
| |
| /** |
| * ICU "poor man's RTTI", returns a UClassID for this class. |
| * |
| * @stable ICU 2.8 |
| */ |
| static UClassID getStaticClassID(); |
| |
| protected: |
| |
| /** |
| * The address of the 'mort' table |
| * |
| * @internal |
| */ |
| const LEReferenceTo<MorphTableHeader2> fMorphTable; |
| |
| /** |
| * This method does GX layout using the font's 'mort' table. It converts the |
| * input character codes to glyph indices using mapCharsToGlyphs, and then |
| * applies the 'mort' table. |
| * |
| * Input parameters: |
| * @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 text is in a right to left directional run |
| * @param glyphStorage - the glyph storage object. The glyph and char index arrays will be set. |
| * |
| * Output parameters: |
| * @param success - set to an error code if the operation fails |
| * |
| * @return the number of glyphs in the glyph index array |
| * |
| * @internal |
| */ |
| virtual le_int32 computeGlyphs(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool rightToLeft, |
| LEGlyphStorage &glyphStorage, LEErrorCode &success); |
| |
| /** |
| * This method adjusts the glyph positions using the font's |
| * 'kern', 'trak', 'bsln', 'opbd' and 'just' tables. |
| * |
| * Input parameters: |
| * @param glyphStorage - the object holding the glyph storage. The positions will be updated as needed. |
| * |
| * Output parameters: |
| * @param success - set to an error code if the operation fails |
| * |
| * @internal |
| */ |
| virtual void adjustGlyphPositions(const LEUnicode chars[], le_int32 offset, le_int32 count, le_bool reverse, |
| LEGlyphStorage &glyphStorage, LEErrorCode &success); |
| |
| }; |
| |
| U_NAMESPACE_END |
| #endif |