/*

 * 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

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package sun.java2d.loops;

import java.awt.Composite;

import java.awt.CompositeContext;

import java.awt.RenderingHints;

import java.awt.image.ColorModel;

import java.awt.image.Raster;

import java.awt.image.WritableRaster;

import java.lang.ref.WeakReference;

import sun.java2d.loops.GraphicsPrimitive;

import sun.java2d.SurfaceData;

import sun.java2d.pipe.Region;

import sun.java2d.pipe.SpanIterator;

/**

 * Blit

 * 1) copies rectangle of pixels from one surface to another

 * 2) performs compositing of colors based upon a Composite

 *    parameter

 *

 * precise behavior is undefined if the source surface

 * and the destination surface are the same surface

 * with overlapping regions of pixels

 */

public class Blit extends GraphicsPrimitive

{

    public static final String methodSignature = "Blit(...)".toString();

    public static final int primTypeID = makePrimTypeID();

    private static RenderCache blitcache = new RenderCache(20);

    public static Blit locate(SurfaceType srctype,

                              CompositeType comptype,

                              SurfaceType dsttype)

    {

        return (Blit)

            GraphicsPrimitiveMgr.locate(primTypeID,

                                        srctype, comptype, dsttype);

    }

    public static Blit getFromCache(SurfaceType src,

                                    CompositeType comp,

                                    SurfaceType dst)

    {

        Object o = blitcache.get(src, comp, dst);

        if (o != null) {

            return (Blit) o;

        }

        Blit blit = locate(src, comp, dst);

        if (blit == null) {

            System.out.println("blit 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 Blit(SurfaceType srctype,

                   CompositeType comptype,

                   SurfaceType dsttype)

    {

        super(methodSignature, primTypeID, srctype, comptype, dsttype);

    }

    public Blit(long pNativePrim,

                SurfaceType srctype,

                CompositeType comptype,

                SurfaceType dsttype)

    {

        super(pNativePrim, methodSignature, primTypeID, srctype, comptype, dsttype);

    }

    /**

     * All Blit implementors must have this invoker method

     */

    public native void Blit(SurfaceData src, SurfaceData dst,

                            Composite comp, Region clip,

                            int srcx, int srcy,

                            int dstx, int dsty,

                            int width, int height);

    static {

        GraphicsPrimitiveMgr.registerGeneral(new Blit(null, null, null));

    }

    public GraphicsPrimitive makePrimitive(SurfaceType srctype,

                                           CompositeType comptype,

                                           SurfaceType dsttype)

    {

        /*

        System.out.println("Constructing general blit for:");

        System.out.println("src:  "+srctype);

        System.out.println("comp: "+comptype);

        System.out.println("dst:  "+dsttype);

        */

        if (comptype.isDerivedFrom(CompositeType.Xor)) {

            GeneralXorBlit gxb = new GeneralXorBlit(srctype,

                                                    comptype,

                                                    dsttype);

            setupGeneralBinaryOp(gxb);

            return gxb;

        } else if (comptype.isDerivedFrom(CompositeType.AnyAlpha)) {

            return new GeneralMaskBlit(srctype, comptype, dsttype);

        } else {

            return AnyBlit.instance;

        }

    }

    private static class AnyBlit extends Blit {

        public static AnyBlit instance = new AnyBlit();

        public AnyBlit() {

            super(SurfaceType.Any, CompositeType.Any, SurfaceType.Any);

        }

        public void Blit(SurfaceData srcData,

                         SurfaceData dstData,

                         Composite comp,

                         Region clip,

                         int srcx, int srcy,

                         int dstx, int dsty,

                         int width, int height)

        {

            ColorModel srcCM = srcData.getColorModel();

            ColorModel dstCM = dstData.getColorModel();

            // REMIND: Should get RenderingHints from sg2d

            CompositeContext ctx = comp.createContext(srcCM, dstCM,

                                                      new RenderingHints(null));

            Raster srcRas = srcData.getRaster(srcx, srcy, width, height);

            WritableRaster dstRas =

                (WritableRaster) dstData.getRaster(dstx, dsty, width, height);

            if (clip == null) {

                clip = Region.getInstanceXYWH(dstx, dsty, width, height);

            }

            int span[] = {dstx, dsty, dstx+width, dsty+height};

            SpanIterator si = clip.getSpanIterator(span);

            srcx -= dstx;

            srcy -= dsty;

            while (si.nextSpan(span)) {

                int w = span[2] - span[0];

                int h = span[3] - span[1];

                Raster tmpSrcRas = srcRas.createChild(srcx + span[0], srcy + span[1],

                                                      w, h, 0, 0, null);

                WritableRaster tmpDstRas = dstRas.createWritableChild(span[0], span[1],

                                                                      w, h, 0, 0, null);

                ctx.compose(tmpSrcRas, tmpDstRas, tmpDstRas);

            }

            ctx.dispose();

        }

    }

    private static class GeneralMaskBlit extends Blit {

        MaskBlit performop;

        public GeneralMaskBlit(SurfaceType srctype,

                               CompositeType comptype,

                               SurfaceType dsttype)

        {

            super(srctype, comptype, dsttype);

            performop = MaskBlit.locate(srctype, comptype, dsttype);

        }

        public void Blit(SurfaceData srcData,

                         SurfaceData dstData,

                         Composite comp,

                         Region clip,

                         int srcx, int srcy,

                         int dstx, int dsty,

                         int width, int height)

        {

            performop.MaskBlit(srcData, dstData, comp, clip,

                               srcx, srcy, dstx, dsty,

                               width, height,

                               null, 0, 0);

        }

    }

    private static class GeneralXorBlit

        extends Blit

        implements GeneralBinaryOp

    {

        Blit convertsrc;

        Blit convertdst;

        Blit performop;

        Blit convertresult;

        WeakReference srcTmp;

        WeakReference dstTmp;

        public GeneralXorBlit(SurfaceType srctype,

                              CompositeType comptype,

                              SurfaceType dsttype)

        {

            super(srctype, comptype, dsttype);

        }

        public void setPrimitives(Blit srcconverter,

                                  Blit dstconverter,

                                  GraphicsPrimitive genericop,

                                  Blit resconverter)

        {

            this.convertsrc = srcconverter;

            this.convertdst = dstconverter;

            this.performop = (Blit) genericop;

            this.convertresult = resconverter;

        }

        public synchronized void Blit(SurfaceData srcData,

                                      SurfaceData dstData,

                                      Composite comp,

                                      Region clip,

                                      int srcx, int srcy,

                                      int dstx, int dsty,

                                      int width, int height)

        {

            SurfaceData src, dst;

            Region opclip;

            int sx, sy, dx, dy;

            if (convertsrc == null) {

                src = srcData;

                sx = srcx;

                sy = srcy;

            } else {

                SurfaceData cachedSrc = null;

                if (srcTmp != null) {

                    cachedSrc = (SurfaceData) srcTmp.get();

                }

                src = convertFrom(convertsrc, srcData, srcx, srcy,

                                  width, height, cachedSrc);

                sx = 0;

                sy = 0;

                if (src != cachedSrc) {

                    srcTmp = new WeakReference(src);

                }

            }

            if (convertdst == null) {

                dst = dstData;

                dx = dstx;

                dy = dsty;

                opclip = clip;

            } else {

                // assert: convertresult != null

                SurfaceData cachedDst = null;

                if (dstTmp != null) {

                    cachedDst = (SurfaceData) dstTmp.get();

                }

                dst = convertFrom(convertdst, dstData, dstx, dsty,

                                  width, height, cachedDst);

                dx = 0;

                dy = 0;

                opclip = null;

                if (dst != cachedDst) {

                    dstTmp = new WeakReference(dst);

                }

            }

            performop.Blit(src, dst, comp, opclip,

                           sx, sy, dx, dy,

                           width, height);

            if (convertresult != null) {

                // assert: convertdst != null

                convertTo(convertresult, dst, dstData, clip,

                          dstx, dsty, width, height);

            }

        }

    }

    public GraphicsPrimitive traceWrap() {

        return new TraceBlit(this);

    }

    private static class TraceBlit extends Blit {

        Blit target;

        public TraceBlit(Blit target) {

            super(target.getSourceType(),

                  target.getCompositeType(),

                  target.getDestType());

            this.target = target;

        }

        public GraphicsPrimitive traceWrap() {

            return this;

        }

        public void Blit(SurfaceData src, SurfaceData dst,

                         Composite comp, Region clip,

                         int srcx, int srcy, int dstx, int dsty,

                         int width, int height)

        {

            tracePrimitive(target);

            target.Blit(src, dst, comp, clip,

                        srcx, srcy, dstx, dsty, width, height);

        }

    }

}