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/* * Copyright (c) 1999, 2004, 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.Composite;import java.lang.ref.WeakReference;import sun.java2d.loops.GraphicsPrimitive;import sun.java2d.SurfaceData;import sun.java2d.pipe.Region; /** * MaskBlit * 1) copies rectangle of pixels from one surface to another * 2) performs compositing of colors based upon a Composite *    parameter * 3) blends result of composite with destination using an *    alpha coverage mask * 4) the mask may be null in which case it should be treated *    as if it were an array of all opaque values (0xff) * * precise behavior is undefined if the source surface * and the destination surface are the same surface * with overlapping regions of pixels */ public class MaskBlit extends GraphicsPrimitive{    public static final String methodSignature = "MaskBlit(...)".toString();     public static final int primTypeID = makePrimTypeID();     private static RenderCache blitcache = new RenderCache(20);     public static MaskBlit locate(SurfaceType srctype,                                  CompositeType comptype,                                  SurfaceType dsttype)    {        return (MaskBlit)            GraphicsPrimitiveMgr.locate(primTypeID,                                        srctype, comptype, dsttype);    }     public static MaskBlit getFromCache(SurfaceType src,                                        CompositeType comp,                                        SurfaceType dst)    {        Object o = blitcache.get(src, comp, dst);        if (o != null) {            return (MaskBlit) o;        }        MaskBlit blit = locate(src, comp, dst);        if (blit == null) {            System.out.println("mask 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 MaskBlit(SurfaceType srctype,                       CompositeType comptype,                       SurfaceType dsttype)    {        super(methodSignature, primTypeID, srctype, comptype, dsttype);    }     public MaskBlit(long pNativePrim,                    SurfaceType srctype,                    CompositeType comptype,                    SurfaceType dsttype)    {        super(pNativePrim, methodSignature, primTypeID, srctype, comptype, dsttype);    }     /**     * All MaskBlit implementors must have this invoker method     */    public native void MaskBlit(SurfaceData src, SurfaceData dst,                                Composite comp, Region clip,                                int srcx, int srcy,                                int dstx, int dsty,                                int width, int height,                                byte[] mask, int maskoff, int maskscan);     static {        GraphicsPrimitiveMgr.registerGeneral(new MaskBlit(null, null, null));    }     public GraphicsPrimitive makePrimitive(SurfaceType srctype,                                           CompositeType comptype,                                           SurfaceType dsttype)    {        /*        new Throwable().printStackTrace();        System.out.println("Constructing general maskblit for:");        System.out.println("src:  "+srctype);        System.out.println("comp: "+comptype);        System.out.println("dst:  "+dsttype);        */         if (CompositeType.Xor.equals(comptype)) {            throw new InternalError("Cannot construct MaskBlit for " +                                    "XOR mode");        }         General ob = new General(srctype, comptype, dsttype);        setupGeneralBinaryOp(ob);        return ob;    }     private static class General        extends MaskBlit        implements GeneralBinaryOp    {        Blit convertsrc;        Blit convertdst;        MaskBlit performop;        Blit convertresult;         WeakReference srcTmp;        WeakReference dstTmp;         public General(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 = (MaskBlit) genericop;            this.convertresult = resconverter;        }         public synchronized void MaskBlit(SurfaceData srcData,                                          SurfaceData dstData,                                          Composite comp,                                          Region clip,                                          int srcx, int srcy,                                          int dstx, int dsty,                                          int width, int height,                                          byte mask[], int offset, int scan)        {            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.MaskBlit(src, dst, comp, opclip,                               sx, sy, dx, dy, width, height,                               mask, offset, scan);             if (convertresult != null) {                // assert: convertdst != null                convertTo(convertresult, dst, dstData, clip,                          dstx, dsty, width, height);            }        }    }     public GraphicsPrimitive traceWrap() {        return new TraceMaskBlit(this);    }     private static class TraceMaskBlit extends MaskBlit {        MaskBlit target;         public TraceMaskBlit(MaskBlit target) {            // We need to have the same NativePrim as our            // target in case we are used with a TransformHelper            super(target.getNativePrim(),                  target.getSourceType(),                  target.getCompositeType(),                  target.getDestType());            this.target = target;        }         public GraphicsPrimitive traceWrap() {            return this;        }         public void MaskBlit(SurfaceData src, SurfaceData dst,                             Composite comp, Region clip,                             int srcx, int srcy, int dstx, int dsty,                             int width, int height,                             byte[] mask, int maskoff, int maskscan)        {            tracePrimitive(target);            target.MaskBlit(src, dst, comp, clip,                            srcx, srcy, dstx, dsty, width, height,                            mask, maskoff, maskscan);        }    }}