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/* * Copyright (c) 1997, 2002, Oracle and/or its affiliates. All rights reserved. * 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. */ package sun.java2d; import java.awt.Composite;import java.awt.CompositeContext;import java.awt.AlphaComposite;import java.awt.image.ColorModel;import java.awt.image.BufferedImage;import java.awt.image.Raster;import java.awt.image.WritableRaster;import sun.awt.image.BufImgSurfaceData;import sun.java2d.loops.XORComposite;import sun.java2d.loops.CompositeType;import sun.java2d.loops.Blit; public class SunCompositeContext implements CompositeContext {    ColorModel srcCM;    ColorModel dstCM;    Composite composite;    CompositeType comptype;     public SunCompositeContext(AlphaComposite ac,                               ColorModel s, ColorModel d)    {        if (s == null) {            throw new NullPointerException("Source color model cannot be null");        }        if (d == null) {            throw new NullPointerException("Destination color model cannot be null");        }        srcCM = s;        dstCM = d;        this.composite = ac;        this.comptype = CompositeType.forAlphaComposite(ac);    }     public SunCompositeContext(XORComposite xc,                               ColorModel s, ColorModel d)    {        if (s == null) {            throw new NullPointerException("Source color model cannot be null");        }        if (d == null) {            throw new NullPointerException("Destination color model cannot be null");        }        srcCM = s;        dstCM = d;        this.composite = xc;        this.comptype = CompositeType.Xor;    }     /**     * Release resources allocated for context.     */    public void dispose() {    }     /**     * This method composes the two source tiles     * and places the result in the destination tile. Note that     * the destination can be the same object as either     * the first or second source.     * @param src1 The first source tile for the compositing operation.     * @param src2 The second source tile for the compositing operation.     * @param dst The tile where the result of the operation is stored.     */    public void compose(Raster srcArg, Raster dstIn, WritableRaster dstOut) {        WritableRaster src;        int w;        int h;         if (dstIn != dstOut) {            dstOut.setDataElements(0, 0, dstIn);        }         // REMIND: We should be able to create a SurfaceData from just        // a non-writable Raster and a ColorModel.  Since we need to        // create a SurfaceData from a BufferedImage then we need to        // make a WritableRaster since it is needed to construct a        // BufferedImage.        if (srcArg instanceof WritableRaster) {            src = (WritableRaster) srcArg;        } else {            src = srcArg.createCompatibleWritableRaster();            src.setDataElements(0, 0, srcArg);        }         w = Math.min(src.getWidth(), dstIn.getWidth());        h = Math.min(src.getHeight(), dstIn.getHeight());         BufferedImage srcImg = new BufferedImage(srcCM, src,                                                 srcCM.isAlphaPremultiplied(),                                                 null);        BufferedImage dstImg = new BufferedImage(dstCM, dstOut,                                                 dstCM.isAlphaPremultiplied(),                                                 null);         SurfaceData srcData = BufImgSurfaceData.createData(srcImg);        SurfaceData dstData = BufImgSurfaceData.createData(dstImg);        Blit blit = Blit.getFromCache(srcData.getSurfaceType(),                                      comptype,                                      dstData.getSurfaceType());        blit.Blit(srcData, dstData, composite, null, 0, 0, 0, 0, w, h);    }}