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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.BoxBlurState;
/**
* A blur effect using a box-shaped convolution kernel, with a configurable
* size for each dimension of the kernel and a number of passes to control
* the quality of the blur.
*/
public class BoxBlur extends CoreEffect {
private final BoxBlurState state = new BoxBlurState();
/**
* Constructs a new {@code BoxBlur} effect with
* the default blur sizes (1, 1)
* and the default number of passes (1),
* using the default input for source data.
* This is a shorthand equivalent to:
*
* new BoxBlur(1, 1, 1, DefaultInput)
*
*/
public BoxBlur() {
this(1, 1);
}
/**
* Constructs a new {@code BoxBlur} effect with
* the given blur sizes
* and the default number of passes (1),
* using the default input for source data.
* This is a shorthand equivalent to:
*
* new BoxBlur(hsize, vsize, 1, DefaultInput)
*
*
* @param hsize the horizontal size of the BoxBlur kernel
* @param vsize the vertical size of the BoxBlur kernel
* @throws IllegalArgumentException if either {@code hsize}
* or {@code vsize} is outside the allowable range
*/
public BoxBlur(int hsize, int vsize) {
this(hsize, vsize, 1, DefaultInput);
}
/**
* Constructs a new {@code BoxBlur} effect with
* the given blur sizes
* and number of passes,
* using the default input for source data.
* This is a shorthand equivalent to:
*
* new BoxBlur(hsize, vsize, passes, DefaultInput)
*
*
* @param hsize the horizontal size of the BoxBlur kernel
* @param vsize the vertical size of the BoxBlur kernel
* @param numpasses the number of blur passes to execute
* @throws IllegalArgumentException if either {@code hsize}
* or {@code vsize} or {@code passes}
* is outside the allowable range
*/
public BoxBlur(int hsize, int vsize, int passes) {
this(hsize, vsize, passes, DefaultInput);
}
/**
* Constructs a new {@code BoxBlur} effect with
* the given blur sizes
* and number of passes,
* using the output of the specified effect for source data.
*
* @param hsize the horizontal size of the BoxBlur kernel
* @param vsize the vertical size of the BoxBlur kernel
* @param numpasses the number of blur passes to execute
* @param input the single input {@code Effect}
* @throws IllegalArgumentException if either {@code hsize}
* or {@code vsize} or {@code passes}
* is outside the allowable range
*/
public BoxBlur(int hsize, int vsize, int passes, Effect input) {
super(input);
setHorizontalSize(hsize);
setVerticalSize(vsize);
setPasses(passes);
}
@Override
Object getState() {
return state;
}
/**
* 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}.
* 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 horizontal size of the effect kernel.
*
* @return the horizontal size of the effect kernel
*/
public int getHorizontalSize() {
return state.getHsize();
}
/**
* Sets the horizontal size of the effect kernel.
*
* Min: 0
* Max: 255
* Default: 1
* Identity: 0
*
*
* @param hsize the horizontal size of the effect kernel
* @throws IllegalArgumentException if {@code hsize}
* is outside the allowable range
*/
public void setHorizontalSize(int hsize) {
int old = state.getHsize();
state.setHsize(hsize);
}
/**
* Returns the vertical size of the effect kernel.
*
* @return the vertical size of the effect kernel
*/
public int getVerticalSize() {
return state.getVsize();
}
/**
* Sets the vertical size of the effect kernel.
*
* Min: 0
* Max: 255
* Default: 1
* Identity: 0
*
*
* @param vsize the vertical size of the effect kernel
* @throws IllegalArgumentException if {@code vsize}
* is outside the allowable range
*/
public void setVerticalSize(int vsize) {
int old = state.getVsize();
state.setVsize(vsize);
}
/**
* Returns the number of passes of the effect kernel to control the
* quality of the blur.
*
* @return the number of passes of the effect kernel
*/
public int getPasses() {
return state.getBlurPasses();
}
/**
* Sets the number of passes of the effect kernel to control the
* quality of the blur.
*
* Min: 0
* Max: 3
* Default: 1
* Identity: 0
*
* A setting of 1 creates a low quality blur. A setting of 3 creates
* a blur that is very close to a Gaussian blur.
*
* @param radius the radius of the effect kernel
* @throws IllegalArgumentException if {@code radius} is outside the
* allowable range
*/
public void setPasses(int passes) {
int old = state.getBlurPasses();
state.setBlurPasses(passes);
}
@Override
public AccelType getAccelType(FilterContext fctx) {
return Renderer.getRenderer(fctx).getAccelType();
}
@Override
public BaseBounds getBounds(BaseTransform transform, Effect defaultInput) {
BaseBounds r = super.getBounds(null, defaultInput);
int hgrow = state.getKernelSize(0) / 2;
int vgrow = state.getKernelSize(1) / 2;
RectBounds ret = new RectBounds(r.getMinX(), r.getMinY(), r.getMaxX(), r.getMaxY());
ret.grow(hgrow, vgrow);
return transformBounds(transform, ret);
}
@Override
public Rectangle getResultBounds(BaseTransform transform,
Rectangle outputClip,
ImageData... inputDatas)
{
Rectangle r = inputDatas[0].getTransformedBounds(null);
r = state.getResultBounds(r, 0);
r = state.getResultBounds(r, 1);
r.intersectWith(outputClip);
return r;
}
@Override
public ImageData filterImageDatas(FilterContext fctx,
BaseTransform transform,
Rectangle outputClip,
ImageData... inputs)
{
return state.filterImageDatas(this, fctx, transform, outputClip, inputs);
}
@Override
public boolean operatesInUserSpace() {
return true;
}
@Override
protected Rectangle getInputClip(int inputIndex,
BaseTransform transform,
Rectangle outputClip)
{
// A blur needs as much "fringe" data from its input as it creates
// around its output so we use the same expansion as is used in the
// result bounds.
if (outputClip != null) {
int hgrow = state.getKernelSize(0) / 2;
int vgrow = state.getKernelSize(1) / 2;
if ((hgrow | vgrow) != 0) {
outputClip = new Rectangle(outputClip);
outputClip.grow(hgrow, vgrow);
}
}
return outputClip;
}
@Override
public boolean reducesOpaquePixels() {
if (!state.isNop()) {
return true;
}
final Effect input = getInput();
return input != null && input.reducesOpaquePixels();
}
@Override
public DirtyRegionContainer getDirtyRegions(Effect defaultInput, DirtyRegionPool regionPool) {
Effect di = getDefaultedInput(0, defaultInput);
DirtyRegionContainer drc = di.getDirtyRegions(defaultInput, regionPool);
drc.grow(state.getKernelSize(0) / 2, state.getKernelSize(1) / 2);
return drc;
}
}
