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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);
	}
	}
	}

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