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This is a backport of OpenJFX 8 to run on Java 7.
The newest version!
/*
* Copyright (c) 2008, 2013, 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 com.sun.scenario.effect;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.HashSet;
import java.util.Iterator;
import com.sun.javafx.geom.Rectangle;
import com.sun.javafx.geom.transform.BaseTransform;
import com.sun.scenario.effect.impl.Renderer;
/**
* A simple container that holds an {@code Image} and the valid source
* region thereof. Instances of {@code ImageData} can be used as the input
* or output from an {@code EffectPeer}.
*
* Instances of this class must be validated against the {@code FilterContext}
* it intended to be used with using
* {@link #validate(com.sun.scenario.effect.FilterContext)} method.
*/
public class ImageData {
private static HashSet alldatas;
static {
AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
if (System.getProperty("decora.showleaks") != null) {
alldatas = new HashSet();
Runtime.getRuntime().addShutdownHook(new Thread() {
@Override
public void run() {
Iterator datas = alldatas.iterator();
while (datas.hasNext()) {
ImageData id = datas.next();
Rectangle r = id.getUntransformedBounds();
System.out.println("id["+r.width+"x"+r.height+", refcount="+id.refcount+"] leaked from:");
id.fromwhere.printStackTrace(System.out);
}
}
});
}
return null;
}
});
}
private ImageData sharedOwner;
private FilterContext fctx;
private int refcount;
private Filterable image;
private final Rectangle bounds;
private BaseTransform transform;
private Throwable fromwhere;
private boolean reusable;
public ImageData(FilterContext fctx, Filterable image, Rectangle bounds) {
this(fctx, image, bounds, BaseTransform.IDENTITY_TRANSFORM);
}
private ImageData(FilterContext fctx, Filterable image, Rectangle bounds,
BaseTransform transform)
{
this.fctx = fctx;
this.refcount = 1;
this.image = image;
this.bounds = bounds;
this.transform = transform;
if (alldatas != null) {
alldatas.add(this);
this.fromwhere = new Throwable();
}
}
public ImageData transform(BaseTransform concattx) {
if (concattx.isIdentity()) {
return this;
}
BaseTransform newtx;
if (this.transform.isIdentity()) {
newtx = concattx;
} else {
newtx = concattx.copy().deriveWithConcatenation(this.transform);
}
return new ImageData(this, newtx, bounds);
}
private ImageData(ImageData original, BaseTransform transform,
Rectangle bounds)
{
this(original.fctx, original.image, bounds, transform);
this.sharedOwner = original;
}
public void setReusable(boolean reusable) {
this.reusable = reusable;
}
public FilterContext getFilterContext() {
return fctx;
}
public Filterable getUntransformedImage() {
return image;
}
public Rectangle getUntransformedBounds() {
return bounds;
}
public BaseTransform getTransform() {
return transform;
}
public Filterable getTransformedImage(Rectangle clip) {
if (image == null || fctx == null) {
return null;
}
if (transform.isIdentity()) {
return image;
} else {
Rectangle txbounds = getTransformedBounds(clip);
return Renderer.getRenderer(fctx).
transform(fctx, image, transform, bounds, txbounds);
}
}
public void releaseTransformedImage(Filterable tximage) {
if (fctx != null && tximage != null && tximage != image) {
Effect.releaseCompatibleImage(fctx, tximage);
}
}
public Rectangle getTransformedBounds(Rectangle clip) {
if (transform.isIdentity()) {
return bounds;
}
Rectangle txbounds = new Rectangle();
transform.transform(bounds, txbounds);
if (clip != null) {
txbounds.intersectWith(clip);
}
return txbounds;
}
public int getReferenceCount() {
return refcount;
}
public boolean addref() {
if (reusable && refcount == 0) {
if (image != null) {
image.lock();
}
}
++refcount;
return image != null && !image.isLost();
}
public void unref() {
if (--refcount == 0) {
if (sharedOwner != null) {
sharedOwner.unref();
sharedOwner = null;
} else if (fctx != null && image != null) {
if (reusable) {
image.unlock();
return;
}
Effect.releaseCompatibleImage(fctx, image);
}
// Just in case - to prevent releasing it twice
fctx = null;
image = null;
if (alldatas != null) {
alldatas.remove(this);
}
}
}
/**
* Validates this image data for the use with the passed
* {@link FilterContext}.
*
* @param fctx context to validate against
* @return {@code true} if this object is valid and compatible with
* the passed {@code FilterContext}, {@code false} otherwise.
*/
public boolean validate(FilterContext fctx) {
return image != null &&
Renderer.getRenderer(fctx).isImageDataCompatible(this);
}
}