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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;
import com.sun.scenario.effect.impl.Renderer;
import com.sun.scenario.effect.impl.state.GaussianShadowState;
/**
* A blurred shadow effect using a Gaussian convolution kernel, with a
* configurable radius and shadow color. Only the alpha channel of the
* input is used to create the shadow effect. The alpha value of each
* pixel from the result of the blur operation is modulated with the
* specified shadow color to produce the resulting image.
*/
public class GaussianShadow extends AbstractShadow {
private GaussianShadowState state = new GaussianShadowState();
/**
* Constructs a new {@code GaussianShadow} effect with the default radius
* (10.0) and the default color ({@code Color4f.BLACK}), using the
* default input for source data.
* This is a shorthand equivalent to:
*
* new GaussianShadow(10f, Color4f.BLACK, DefaultInput)
*
*/
public GaussianShadow() {
this(10f);
}
/**
* Constructs a new {@code GaussianShadow} effect with the given radius
* and the default color ({@code Color4f.BLACK}), using the
* default input for source data.
* This is a shorthand equivalent to:
*
* new GaussianShadow(radius, Color4f.BLACK, DefaultInput)
*
*
* @param radius the radius of the Gaussian kernel
* @throws IllegalArgumentException if {@code radius} is outside the
* allowable range
*/
public GaussianShadow(float radius) {
this(radius, Color4f.BLACK);
}
/**
* Constructs a new {@code GaussianShadow} effect with the given radius
* and color, using the default input for source data.
* This is a shorthand equivalent to:
*
* new GaussianShadow(radius, color, DefaultInput)
*
*
* @param radius the radius of the Gaussian kernel
* @param color the shadow {@code Color4f}
* @throws IllegalArgumentException if {@code radius} is outside the
* allowable range
*/
public GaussianShadow(float radius, Color4f color) {
this(radius, color, DefaultInput);
}
/**
* Constructs a new {@code GaussianShadow} effect with the given
* radius and color.
*
* @param radius the radius of the Gaussian kernel
* @param color the shadow {@code Color4f}
* @param input the single input {@code Effect}
* @throws IllegalArgumentException if {@code radius} is outside the
* allowable range, or if {@code color} is null
*/
public GaussianShadow(float radius, Color4f color, Effect input) {
super(input);
state.setRadius(radius);
state.setShadowColor(color);
}
@Override
Object getState() {
return state;
}
@Override
public AccelType getAccelType(FilterContext fctx) {
return Renderer.getRenderer(fctx).getAccelType();
}
/**
* 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 radius of the Gaussian kernel.
*
* @return the radius of the Gaussian kernel
*/
public float getRadius() {
return state.getRadius();
}
/**
* Sets the radius of the Gaussian kernel.
*
*
* @param radius the radius of the Gaussian kernel
* @throws IllegalArgumentException if {@code radius} is outside the
* allowable range
*/
public void setRadius(float radius) {
float old = state.getRadius();
state.setRadius(radius);
}
/**
* Returns the horizontal radius of the Gaussian kernel.
*
* @return the horizontal radius of the Gaussian kernel
*/
public float getHRadius() {
return state.getHRadius();
}
/**
* Sets the horizontal radius of the Gaussian kernel.
*
*
* @param hradius the horizontal radius of the Gaussian kernel
* @throws IllegalArgumentException if {@code radius} is outside the
* allowable range
*/
public void setHRadius(float hradius) {
float old = state.getHRadius();
state.setHRadius(hradius);
}
/**
* Returns the vertical radius of the Gaussian kernel.
*
* @return the vertical radius of the Gaussian kernel
*/
public float getVRadius() {
return state.getVRadius();
}
/**
* Sets the vertical radius of the Gaussian kernel.
*
*
* @param vradius the vertical radius of the Gaussian kernel
* @throws IllegalArgumentException if {@code radius} is outside the
* allowable range
*/
public void setVRadius(float vradius) {
float old = state.getVRadius();
state.setVRadius(vradius);
}
/**
* Gets the spread of the shadow effect.
*
* @return the spread of the shadow effect
*/
public float getSpread() {
return state.getSpread();
}
/**
* Sets the spread of the shadow effect.
* The spread is the portion of the radius where the contribution of
* the source material will be 100%.
* The remaining portion of the radius will have a contribution
* controlled by the Gaussian kernel.
* A spread of {@code 0.0} will result in a pure Gaussian distribution
* of the shadow.
* A spread of {@code 1.0} will result in a solid growth outward of the
* source material opacity to the limit of the radius with a very sharp
* cutoff to transparency at the radius.
*
*
* @param spread the spread of the shadow effect
* @throws IllegalArgumentException if {@code spread} is outside the
* allowable range
*/
public void setSpread(float spread) {
float old = state.getSpread();
state.setSpread(spread);
}
/**
* Returns the shadow color.
*
* @return the shadow color
*/
public Color4f getColor() {
return state.getShadowColor();
}
/**
* Sets the shadow color.
*