0N/A/*
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
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
2362N/A * published by the Free Software Foundation. Oracle designates this
0N/A * particular file as subject to the "Classpath" exception as provided
2362N/A * by Oracle in the LICENSE file that accompanied this code.
0N/A *
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 *
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 *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
2362N/A * questions.
0N/A *
0N/A */
0N/A
1693N/A
0N/A/*
0N/A *
0N/A * (C) Copyright IBM Corp. 1998-2004 - All Rights Reserved
0N/A *
0N/A */
0N/A
0N/A#ifndef __GXLAYOUTENGINE_H
0N/A#define __GXLAYOUTENGINE_H
0N/A
0N/A#include "LETypes.h"
0N/A#include "LayoutEngine.h"
0N/A
0N/A#include "MorphTables.h"
0N/A
1693N/AU_NAMESPACE_BEGIN
1693N/A
0N/Aclass LEFontInstance;
0N/Aclass LEGlyphStorage;
0N/A
0N/A/**
0N/A * This class implements layout for QuickDraw GX or Apple Advanced Typograyph (AAT)
0N/A * fonts. A font is a GX or AAT font if it contains a 'mort' table. See Apple's
0N/A * TrueType Reference Manual (http://fonts.apple.com/TTRefMan/index.html) for details.
0N/A * Information about 'mort' tables is in the chapter titled "Font Files."
0N/A *
0N/A * @internal
0N/A */
0N/Aclass GXLayoutEngine : public LayoutEngine
0N/A{
0N/Apublic:
0N/A /**
0N/A * This is the main constructor. It constructs an instance of GXLayoutEngine for
0N/A * a particular font, script and language. It takes the 'mort' table as a parameter since
0N/A * LayoutEngine::layoutEngineFactory has to read the 'mort' table to know that it has a
0N/A * GX font.
0N/A *
0N/A * Note: GX and AAT fonts don't contain any script and language specific tables, so
0N/A * the script and language are ignored.
0N/A *
0N/A * @param fontInstance - the font
0N/A * @param scriptCode - the script
0N/A * @param langaugeCode - the language
0N/A * @param morphTable - the 'mort' table
3171N/A * @param success - set to an error code if the operation fails
0N/A *
0N/A * @see LayoutEngine::layoutEngineFactory
0N/A * @see ScriptAndLangaugeTags.h for script and language codes
0N/A *
0N/A * @internal
0N/A */
5980N/A GXLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode, const LEReferenceTo<MorphTableHeader> &morphTable, LEErrorCode &success);
0N/A
0N/A /**
0N/A * The destructor, virtual for correct polymorphic invocation.
0N/A *
0N/A * @internal
0N/A */
0N/A virtual ~GXLayoutEngine();
0N/A
1693N/A /**
1693N/A * ICU "poor man's RTTI", returns a UClassID for the actual class.
1693N/A *
1693N/A * @stable ICU 2.8
1693N/A */
1693N/A virtual UClassID getDynamicClassID() const;
1693N/A
1693N/A /**
1693N/A * ICU "poor man's RTTI", returns a UClassID for this class.
1693N/A *
1693N/A * @stable ICU 2.8
1693N/A */
1693N/A static UClassID getStaticClassID();
1693N/A
0N/Aprotected:
0N/A
0N/A /**
0N/A * The address of the 'mort' table
0N/A *
0N/A * @internal
0N/A */
5980N/A LEReferenceTo<MorphTableHeader> fMorphTable;
0N/A
0N/A /**
0N/A * This method does GX layout using the font's 'mort' table. It converts the
0N/A * input character codes to glyph indices using mapCharsToGlyphs, and then
0N/A * applies the 'mort' table.
0N/A *
0N/A * Input parameters:
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
1693N/A * @param rightToLeft - <code>TRUE</code> if the text is in a right to left directional run
1693N/A * @param glyphStorage - the glyph storage object. The glyph and char index arrays will be set.
0N/A *
0N/A * Output parameters:
0N/A * @param success - set to an error code if the operation fails
0N/A *
0N/A * @return the number of glyphs in the glyph index array
0N/A *
0N/A * @internal
0N/A */
1693N/A virtual le_int32 computeGlyphs(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool rightToLeft,
0N/A LEGlyphStorage &glyphStorage, LEErrorCode &success);
0N/A
0N/A /**
0N/A * This method adjusts the glyph positions using the font's
0N/A * 'kern', 'trak', 'bsln', 'opbd' and 'just' tables.
0N/A *
0N/A * Input parameters:
1693N/A * @param glyphStorage - the object holding the glyph storage. The positions will be updated as needed.
0N/A *
0N/A * Output parameters:
0N/A * @param success - set to an error code if the operation fails
0N/A *
0N/A * @internal
0N/A */
1693N/A virtual void adjustGlyphPositions(const LEUnicode chars[], le_int32 offset, le_int32 count, le_bool reverse,
1693N/A LEGlyphStorage &glyphStorage, LEErrorCode &success);
1693N/A
0N/A};
0N/A
1693N/AU_NAMESPACE_END
0N/A#endif
1693N/A