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/*
* 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
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*/
package com.sun.scenario.effect;
import com.sun.javafx.geom.BaseBounds;
import com.sun.javafx.geom.DirtyRegionContainer;
import com.sun.javafx.geom.DirtyRegionPool;
import com.sun.javafx.geom.RectBounds;
import com.sun.javafx.geom.Rectangle;
import com.sun.javafx.geom.transform.BaseTransform;
/**
* An effect that returns a mask that is the inverse of the input (i.e.,
* opaque areas of the input become transparent and vice versa) with a
* given offset and padding.
*/
public class InvertMask extends CoreEffect {
private int pad;
private int xoff;
private int yoff;
/**
* Constructs a new {@code InvertMask} effect with the default pad (10),
* using the default input for source data.
* This is a shorthand equivalent to:
*
* new InvertMask(10, DefaultInput)
*
*/
public InvertMask() {
this(10);
}
/**
* Constructs a new {@code InvertMask} effect with the default pad (10),
* using the given {@code Effect} as the input.
* This is a shorthand equivalent to:
*
* new InvertMask(10, input)
*
*
* @param input the single input {@code Effect}
*/
public InvertMask(Effect input) {
this(10, input);
}
/**
* Constructs a new {@code InvertMask} effect with the given pad value
* using the default input for source data.
*
* @param pad the amount of padding on each side of the resulting image
* @throws IllegalArgumentException if {@code pad} is negative
*/
public InvertMask(int pad) {
this(pad, DefaultInput);
}
/**
* Constructs a new {@code InvertMask} effect with the given pad value
* and effect input.
*
* @param pad the amount of padding on each side of the resulting image
* @param input the single input {@code Effect}
* @throws IllegalArgumentException if {@code pad} is negative
*/
public InvertMask(int pad, Effect input) {
super(input);
setPad(pad);
updatePeerKey("InvertMask");
}
/**
* 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 amount of padding added to each side of the resulting
* image, in pixels.
*
* @return the amount of padding, in pixels
*/
public int getPad() {
return pad;
}
/**
* Sets the amount of padding added to each side of the resulting
* image, in pixels.
*
*
* @param pad the amount of padding, in pixels
* @throws IllegalArgumentException if {@code pad} is negative
*/
public void setPad(int pad) {
if (pad < 0) {
throw new IllegalArgumentException("Pad value must be non-negative");
}
int old = this.pad;
this.pad = pad;
}
/**
* Returns the offset in the x direction, in pixels.
*
* @return the offset in the x direction, in pixels.
*/
public int getOffsetX() {
return xoff;
}
/**
* Sets the offset in the x direction, in pixels.
*
*
* @param xoff the offset in the x direction, in pixels
*/
public void setOffsetX(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 getOffsetY() {
return yoff;
}
/**
* Sets the offset in the y direction, in pixels.
*
*
* @param yoff the offset in the y direction, in pixels
*/
public void setOffsetY(int yoff) {
float old = this.yoff;
this.yoff = yoff;
}
@Override
public BaseBounds getBounds(BaseTransform transform, Effect defaultInput) {
BaseBounds bounds = super.getBounds(BaseTransform.IDENTITY_TRANSFORM, defaultInput);
BaseBounds ret = new RectBounds(bounds.getMinX(), bounds.getMinY(),
bounds.getMaxX(), bounds.getMaxY());
((RectBounds) ret).grow(pad, pad);
if (!transform.isIdentity()) {
ret = transformBounds(transform, ret);
}
return ret;
}
@Override
public Rectangle getResultBounds(BaseTransform transform,
Rectangle outputClip,
ImageData... inputDatas)
{
Rectangle r = super.getResultBounds(transform, outputClip, inputDatas);
Rectangle ret = new Rectangle(r);
ret.grow(pad, pad);
return ret;
}
@Override
protected Rectangle getInputClip(int inputIndex,
BaseTransform transform,
Rectangle outputClip)
{
// Typically the mask gets padded by synthetic opaque mask data
// that is computed from the lack of input pixels in the padded
// area. But in the case where a clip has cut down on the
// amount of data we are generating then the padding for this
// particular (clipped) operation may not be synthetic, rather it
// may actually represent inversions of real input pixels. Thus,
// the clip for the input needs to make sure it includes any
// valid input pixels that may appear not just in the output
// clip, but also in its padded fringe.
if (outputClip != null) {
if (pad != 0) {
outputClip = new Rectangle(outputClip);
outputClip.grow(pad, pad);
}
}
return outputClip;
}
@Override
public boolean reducesOpaquePixels() {
return true;
}
@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;
}
}
