/*
 * Copyright (c) 1999, 2008, 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.loops;

import java.awt.Font;
import java.awt.Color;
import java.awt.Composite;
import java.awt.AlphaComposite;
import java.awt.Transparency;
import java.awt.image.ColorModel;
import java.awt.image.WritableRaster;
import java.awt.image.BufferedImage;
import sun.awt.image.BufImgSurfaceData;
import sun.java2d.loops.GraphicsPrimitive;
import sun.java2d.SurfaceData;
import sun.java2d.SunGraphics2D;
import sun.java2d.pipe.Region;

BlitBg
1) copies rectangle of pixels from one surface to another
2) performs compositing of colors based upon a Composite
   parameter
3) assumes that non-opaque pixels are to be blended with
   the indicated Bg color before compositing with the
   destination
precise behavior is undefined if the source surface
and the destination surface are the same surface
with overlapping regions of pixels
/**
 * BlitBg
 * 1) copies rectangle of pixels from one surface to another
 * 2) performs compositing of colors based upon a Composite
 *    parameter
 * 3) assumes that non-opaque pixels are to be blended with
 *    the indicated Bg color before compositing with the
 *    destination
 *
 * precise behavior is undefined if the source surface
 * and the destination surface are the same surface
 * with overlapping regions of pixels
 */
public class BlitBg extends GraphicsPrimitive
{
    public static final String methodSignature = "BlitBg(...)".toString();

    public static final int primTypeID = makePrimTypeID();

    private static RenderCache blitcache = new RenderCache(20);

    public static BlitBg locate(SurfaceType srctype,
                                CompositeType comptype,
                                SurfaceType dsttype)
    {
        return (BlitBg)
            GraphicsPrimitiveMgr.locate(primTypeID,
                                        srctype, comptype, dsttype);
    }

    public static BlitBg getFromCache(SurfaceType src,
                                      CompositeType comp,
                                      SurfaceType dst)
    {
        Object o = blitcache.get(src, comp, dst);
        if (o != null) {
            return (BlitBg) o;
        }
        BlitBg blit = locate(src, comp, dst);
        if (blit == null) {
            System.out.println("blitbg loop not found for:");
            System.out.println("src:  "+src);
            System.out.println("comp: "+comp);
            System.out.println("dst:  "+dst);
        } else {
            blitcache.put(src, comp, dst, blit);
        }
        return blit;
    }

    protected BlitBg(SurfaceType srctype,
                     CompositeType comptype,
                     SurfaceType dsttype)
    {
        super(methodSignature, primTypeID, srctype, comptype, dsttype);
    }

    public BlitBg(long pNativePrim,
                  SurfaceType srctype,
                  CompositeType comptype,
                  SurfaceType dsttype)
    {
        super(pNativePrim, methodSignature, primTypeID, srctype, comptype, dsttype);
    }

    
All BlitBg implementors must have this invoker method
/**
     * All BlitBg implementors must have this invoker method
     */
    public native void BlitBg(SurfaceData src, SurfaceData dst,
                              Composite comp, Region clip,
                              int bgColor,
                              int srcx, int srcy,
                              int dstx, int dsty,
                              int width, int height);

    static {
        GraphicsPrimitiveMgr.registerGeneral(new BlitBg(null, null, null));
    }

    public GraphicsPrimitive makePrimitive(SurfaceType srctype,
                                           CompositeType comptype,
                                           SurfaceType dsttype)
    {
        /*
        System.out.println("Constructing general blitbg for:");
        System.out.println("src:  "+srctype);
        System.out.println("comp: "+comptype);
        System.out.println("dst:  "+dsttype);
        */
        return new General(srctype, comptype, dsttype);
    }

    private static class General extends BlitBg {
        CompositeType compositeType;

        public General(SurfaceType srctype,
                       CompositeType comptype,
                       SurfaceType dsttype)
        {
            super(srctype, comptype, dsttype);
            compositeType = comptype;
        }

        @Override
        public void BlitBg(SurfaceData srcData,
                           SurfaceData dstData,
                           Composite comp,
                           Region clip,
                           int bgArgb,
                           int srcx, int srcy,
                           int dstx, int dsty,
                           int width, int height)
        {
            ColorModel dstModel = dstData.getColorModel();
            boolean bgHasAlpha = (bgArgb >>> 24) != 0xff;
            if (!dstModel.hasAlpha() && bgHasAlpha) {
                dstModel = ColorModel.getRGBdefault();
            }
            WritableRaster wr =
                dstModel.createCompatibleWritableRaster(width, height);
            boolean isPremult = dstModel.isAlphaPremultiplied();
            BufferedImage bimg =
                new BufferedImage(dstModel, wr, isPremult, null);
            SurfaceData tmpData = BufImgSurfaceData.createData(bimg);
            Color bgColor = new Color(bgArgb, bgHasAlpha);
            SunGraphics2D sg2d = new SunGraphics2D(tmpData, bgColor, bgColor,
                                                   defaultFont);
            FillRect fillop = FillRect.locate(SurfaceType.AnyColor,
                                              CompositeType.SrcNoEa,
                                              tmpData.getSurfaceType());
            Blit combineop = Blit.getFromCache(srcData.getSurfaceType(),
                                               CompositeType.SrcOverNoEa,
                                               tmpData.getSurfaceType());
            Blit blitop = Blit.getFromCache(tmpData.getSurfaceType(), compositeType,
                                            dstData.getSurfaceType());
            fillop.FillRect(sg2d, tmpData, 0, 0, width, height);
            combineop.Blit(srcData, tmpData, AlphaComposite.SrcOver, null,
                           srcx, srcy, 0, 0, width, height);
            blitop.Blit(tmpData, dstData, comp, clip,
                        0, 0, dstx, dsty, width, height);
        }

        private static Font defaultFont = new Font("Dialog", Font.PLAIN, 12);
    }

    public GraphicsPrimitive traceWrap() {
        return new TraceBlitBg(this);
    }

    private static class TraceBlitBg extends BlitBg {
        BlitBg target;

        public TraceBlitBg(BlitBg target) {
            super(target.getSourceType(),
                  target.getCompositeType(),
                  target.getDestType());
            this.target = target;
        }

        public GraphicsPrimitive traceWrap() {
            return this;
        }

        @Override
        public void BlitBg(SurfaceData src, SurfaceData dst,
                           Composite comp, Region clip,
                           int bgColor,
                           int srcx, int srcy, int dstx, int dsty,
                           int width, int height)
        {
            tracePrimitive(target);
            target.BlitBg(src, dst, comp, clip, bgColor,
                          srcx, srcy, dstx, dsty, width, height);
        }
    }
}