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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 com.sun.javafx.geom.Point2D;
import com.sun.javafx.geom.BaseBounds;
import com.sun.javafx.geom.DirtyRegionContainer;
import com.sun.javafx.geom.DirtyRegionPool;
import com.sun.javafx.geom.Rectangle;
import com.sun.javafx.geom.transform.BaseTransform;
import com.sun.javafx.geom.transform.Translate2D;
/**
* A trivial effect that offsets the input image by the given x/y
* adjustment values.
*/
public class Offset extends Effect {
private int xoff;
private int yoff;
/**
* Constructs a new {@code Offset} effect with the given x/y
* adjustment values.
*
* @param xoff the offset in the x direction, in pixels
* @param yoff the offset in the y direction, in pixels
* @param input the single input {@code Effect}
*/
public Offset(int xoff, int yoff, Effect input) {
super(input);
this.xoff = xoff;
this.yoff = yoff;
}
/**
* Returns the input for this {@code Effect}.
*
* @return the input for this {@code Effect}
*/
public final Effect getInput() {
return getInputs().get(0);
}
/**
* Sets the input for this {@code Effect} to a specific
* {@code Effect} or to the default input if {@code input} is
* {@code null}.
*
* @param input the input for this {@code Effect}
*/
public void setInput(Effect input) {
setInput(0, input);
}
/**
* Returns the offset in the x direction, in pixels.
*
* @return the offset in the x direction, in pixels.
*/
public int getX() {
return xoff;
}
/**
* Sets the offset in the x direction, in pixels.
*
* Min: Integer.MIN_VALUE
* Max: Integer.MAX_VALUE
* Default: 0
* Identity: 0
*
*
* @param xoff the offset in the x direction, in pixels
*/
public void setX(int xoff) {
int old = this.xoff;
this.xoff = xoff;
}
/**
* Returns the offset in the y direction, in pixels.
*
* @return the offset in the y direction, in pixels.
*/
public int getY() {
return yoff;
}
/**
* Sets the offset in the y direction, in pixels.
*
* Min: Integer.MIN_VALUE
* Max: Integer.MAX_VALUE
* Default: 0
* Identity: 0
*
*
* @param yoff the offset in the y direction, in pixels
*/
public void setY(int yoff) {
float old = this.yoff;
this.yoff = yoff;
}
static BaseTransform getOffsetTransform(BaseTransform transform,
double xoff, double yoff)
{
if (transform == null || transform.isIdentity()) {
return Translate2D.getInstance(xoff, yoff);
} else {
return transform.copy().deriveWithTranslation(xoff, yoff);
}
}
@Override
public BaseBounds getBounds(BaseTransform transform,
Effect defaultInput)
{
BaseTransform at = getOffsetTransform(transform, xoff, yoff);
Effect input = getDefaultedInput(0, defaultInput);
return input.getBounds(at, defaultInput);
}
@Override
public ImageData filter(FilterContext fctx,
BaseTransform transform,
Rectangle outputClip,
Object renderHelper,
Effect defaultInput)
{
BaseTransform at = getOffsetTransform(transform, xoff, yoff);
// REMIND: Does the outputClip need to be transformed?
// Probably not since we are modifying the transform of the
// full operation and the clip is in "device space"...
Effect input = getDefaultedInput(0, defaultInput);
return input.filter(fctx, at, outputClip, renderHelper, defaultInput);
}
@Override
public Point2D transform(Point2D p, Effect defaultInput) {
p = getDefaultedInput(0, defaultInput).transform(p, defaultInput);
float x = (float) (p.x + xoff);
float y = (float) (p.y + yoff);
p = new Point2D(x, y);
return p;
}
@Override
public Point2D untransform(Point2D p, Effect defaultInput) {
float x = (float) (p.x - xoff);
float y = (float) (p.y - yoff);
p = new Point2D(x, y);
p = getDefaultedInput(0, defaultInput).untransform(p, defaultInput);
return p;
}
@Override
public AccelType getAccelType(FilterContext fctx) {
return getInputs().get(0).getAccelType(fctx);
}
@Override
public boolean reducesOpaquePixels() {
return getX() != 0 || getY() != 0 || (getInput() != null && getInput().reducesOpaquePixels());
}
@Override
public DirtyRegionContainer getDirtyRegions(Effect defaultInput, DirtyRegionPool regionPool) {
Effect di = getDefaultedInput(0, defaultInput);
DirtyRegionContainer drc = di.getDirtyRegions(defaultInput, regionPool);
if (xoff != 0 || yoff != 0) {
for (int i = 0; i < drc.size(); i++) {
drc.getDirtyRegion(i).translate(xoff, yoff, 0);
}
}
return drc;
}
}