/*
 * Copyright (c) 1999, 2018, 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.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
/** * 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
/** * 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<SurfaceData> srcTmp; WeakReference<SurfaceData> 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 = 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 = 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); } } }