/*

 * Copyright 1997-2002 Sun Microsystems, Inc.  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.  Sun designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.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);

    }

}