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	/*
	* Copyright (c) 1999, 2011, 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
	*/

	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);
	}
	}
	}

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