Fast Blur Demo
/*
* Copyright (c) 2007, Romain Guy
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of the TimingFramework project nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
import java.awt.Rectangle;
import java.awt.RenderingHints;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImageOp;
import java.awt.image.BufferedImage;
import java.awt.image.ColorModel;
import java.awt.image.Raster;
import java.awt.image.WritableRaster;
import java.awt.GraphicsConfiguration;
import java.awt.Transparency;
import java.awt.Graphics;
import java.awt.GraphicsEnvironment;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.io.IOException;
import java.net.URL;
import javax.imageio.ImageIO;
import java.awt.AlphaComposite;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.IOException;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.SwingUtilities;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
/**
* See {@link org.jdesktop.swingx.image.FastBlurFilter}.
*
* @author Romain Guy <romain.guy@mac.com>
*/
public class FastBlurDemo extends JFrame {
private BlurTestPanel blurTestPanel;
private JSlider radiusSlider;
private JSlider iterationsSlider;
public FastBlurDemo() {
super("Fast Blur/Stack Blur");
blurTestPanel = new BlurTestPanel();
add(blurTestPanel);
radiusSlider = new JSlider(0, 100, 0);
radiusSlider.addChangeListener(new ChangeListener() {
public void stateChanged(ChangeEvent e) {
blurTestPanel.setRadius(radiusSlider.getValue());
}
});
iterationsSlider = new JSlider(1, 15, 1);
iterationsSlider.addChangeListener(new ChangeListener() {
public void stateChanged(ChangeEvent e) {
blurTestPanel.setIterations(iterationsSlider.getValue());
}
});
JPanel controls = new JPanel(new FlowLayout(FlowLayout.LEFT));
controls.add(new JLabel("Radius: 0px"));
controls.add(radiusSlider);
controls.add(new JLabel("100px"));
controls.add(new JLabel("Iterations: 1"));
controls.add(iterationsSlider);
controls.add(new JLabel("15"));
add(controls, BorderLayout.SOUTH);
pack();
setLocationRelativeTo(null);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
private static class BlurTestPanel extends JPanel {
private BufferedImage image = null;
private BufferedImage imageA;
private int radius = 0;
private StackBlurFilter blurFilter;
private int iterations = 1;
private boolean repaint = false;
public BlurTestPanel() {
try {
imageA = GraphicsUtilities.loadCompatibleImage(getClass().getResource("A.jpg"));
} catch (IOException e) {
e.printStackTrace();
}
blurFilter = new StackBlurFilter(radius, iterations);
}
@Override
public Dimension getPreferredSize() {
return new Dimension(imageA.getWidth(), imageA.getHeight());
}
@Override
protected void paintComponent(Graphics g) {
if (image == null) {
image = new BufferedImage(imageA.getWidth(),
imageA.getHeight(),
BufferedImage.TYPE_INT_ARGB);
repaint = true;
}
if (repaint) {
Graphics2D g2 = image.createGraphics();
g2.setComposite(AlphaComposite.Clear);
g2.fillRect(0, 0, image.getWidth(), image.getHeight());
g2.setComposite(AlphaComposite.Src);
if (radius > 0) {
long start = System.nanoTime();
g2.drawImage(imageA, blurFilter, 0, 0);
long delay = System.nanoTime() - start;
System.out.println("time = " + (delay / 1000.0f / 1000.0f) + "ms");
} else {
g2.drawImage(imageA, null, 0, 0);
}
g2.dispose();
repaint = false;
}
int x = (getWidth() - image.getWidth()) / 2;
int y = (getHeight() - image.getHeight()) / 2;
g.drawImage(image, x, y, null);
}
public void setRadius(int radius) {
this.radius = radius;
this.blurFilter = new StackBlurFilter(radius, iterations);
repaint = true;
repaint();
}
public void setIterations(int iterations) {
this.iterations = iterations;
this.blurFilter = new StackBlurFilter(radius, iterations);
repaint = true;
repaint();
}
}
public static void main(String... args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new FastBlurDemo().setVisible(true);
}
});
}
}
/*
* Copyright (c) 2007, Romain Guy
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of the TimingFramework project nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* <p><code>GraphicsUtilities</code> contains a set of tools to perform
* common graphics operations easily. These operations are divided into
* several themes, listed below.</p>
* <h2>Compatible Images</h2>
* <p>Compatible images can, and should, be used to increase drawing
* performance. This class provides a number of methods to load compatible
* images directly from files or to convert existing images to compatibles
* images.</p>
* <h2>Creating Thumbnails</h2>
* <p>This class provides a number of methods to easily scale down images.
* Some of these methods offer a trade-off between speed and result quality and
* shouuld be used all the time. They also offer the advantage of producing
* compatible images, thus automatically resulting into better runtime
* performance.</p>
* <p>All these methodes are both faster than
* {@link java.awt.Image#getScaledInstance(int, int, int)} and produce
* better-looking results than the various <code>drawImage()</code> methods
* in {@link java.awt.Graphics}, which can be used for image scaling.</p>
* <h2>Image Manipulation</h2>
* <p>This class provides two methods to get and set pixels in a buffered image.
* These methods try to avoid unmanaging the image in order to keep good
* performance.</p>
*
* @author Romain Guy <romain.guy@mac.com>
*/
class GraphicsUtilities {
private GraphicsUtilities() {
}
// Returns the graphics configuration for the primary screen
private static GraphicsConfiguration getGraphicsConfiguration() {
return GraphicsEnvironment.getLocalGraphicsEnvironment().
getDefaultScreenDevice().getDefaultConfiguration();
}
/**
* <p>Returns a new <code>BufferedImage</code> using the same color model
* as the image passed as a parameter. The returned image is only compatible
* with the image passed as a parameter. This does not mean the returned
* image is compatible with the hardware.</p>
*
* @param image the reference image from which the color model of the new
* image is obtained
* @return a new <code>BufferedImage</code>, compatible with the color model
* of <code>image</code>
*/
public static BufferedImage createColorModelCompatibleImage(BufferedImage image) {
ColorModel cm = image.getColorModel();
return new BufferedImage(cm,
cm.createCompatibleWritableRaster(image.getWidth(),
image.getHeight()),
cm.isAlphaPremultiplied(), null);
}
/**
* <p>Returns a new compatible image with the same width, height and
* transparency as the image specified as a parameter.</p>
*
* @see java.awt.Transparency
* @see #createCompatibleImage(int, int)
* @see #createCompatibleImage(java.awt.image.BufferedImage, int, int)
* @see #createCompatibleTranslucentImage(int, int)
* @see #loadCompatibleImage(java.net.URL)
* @see #toCompatibleImage(java.awt.image.BufferedImage)
* @param image the reference image from which the dimension and the
* transparency of the new image are obtained
* @return a new compatible <code>BufferedImage</code> with the same
* dimension and transparency as <code>image</code>
*/
public static BufferedImage createCompatibleImage(BufferedImage image) {
return createCompatibleImage(image, image.getWidth(), image.getHeight());
}
/**
* <p>Returns a new compatible image of the specified width and height, and
* the same transparency setting as the image specified as a parameter.</p>
*
* @see java.awt.Transparency
* @see #createCompatibleImage(java.awt.image.BufferedImage)
* @see #createCompatibleImage(int, int)
* @see #createCompatibleTranslucentImage(int, int)
* @see #loadCompatibleImage(java.net.URL)
* @see #toCompatibleImage(java.awt.image.BufferedImage)
* @param width the width of the new image
* @param height the height of the new image
* @param image the reference image from which the transparency of the new
* image is obtained
* @return a new compatible <code>BufferedImage</code> with the same
* transparency as <code>image</code> and the specified dimension
*/
public static BufferedImage createCompatibleImage(BufferedImage image,
int width, int height) {
return getGraphicsConfiguration().createCompatibleImage(width, height,
image.getTransparency());
}
/**
* <p>Returns a new opaque compatible image of the specified width and
* height.</p>
*
* @see #createCompatibleImage(java.awt.image.BufferedImage)
* @see #createCompatibleImage(java.awt.image.BufferedImage, int, int)
* @see #createCompatibleTranslucentImage(int, int)
* @see #loadCompatibleImage(java.net.URL)
* @see #toCompatibleImage(java.awt.image.BufferedImage)
* @param width the width of the new image
* @param height the height of the new image
* @return a new opaque compatible <code>BufferedImage</code> of the
* specified width and height
*/
public static BufferedImage createCompatibleImage(int width, int height) {
return getGraphicsConfiguration().createCompatibleImage(width, height);
}
/**
* <p>Returns a new translucent compatible image of the specified width
* and height.</p>
*
* @see #createCompatibleImage(java.awt.image.BufferedImage)
* @see #createCompatibleImage(java.awt.image.BufferedImage, int, int)
* @see #createCompatibleImage(int, int)
* @see #loadCompatibleImage(java.net.URL)
* @see #toCompatibleImage(java.awt.image.BufferedImage)
* @param width the width of the new image
* @param height the height of the new image
* @return a new translucent compatible <code>BufferedImage</code> of the
* specified width and height
*/
public static BufferedImage createCompatibleTranslucentImage(int width,
int height) {
return getGraphicsConfiguration().createCompatibleImage(width, height,
Transparency.TRANSLUCENT);
}
/**
* <p>Returns a new compatible image from a URL. The image is loaded from the
* specified location and then turned, if necessary into a compatible
* image.</p>
*
* @see #createCompatibleImage(java.awt.image.BufferedImage)
* @see #createCompatibleImage(java.awt.image.BufferedImage, int, int)
* @see #createCompatibleImage(int, int)
* @see #createCompatibleTranslucentImage(int, int)
* @see #toCompatibleImage(java.awt.image.BufferedImage)
* @param resource the URL of the picture to load as a compatible image
* @return a new translucent compatible <code>BufferedImage</code> of the
* specified width and height
* @throws java.io.IOException if the image cannot be read or loaded
*/
public static BufferedImage loadCompatibleImage(URL resource)
throws IOException {
BufferedImage image = ImageIO.read(resource);
return toCompatibleImage(image);
}
/**
* <p>Return a new compatible image that contains a copy of the specified
* image. This method ensures an image is compatible with the hardware,
* and therefore optimized for fast blitting operations.</p>
*
* @see #createCompatibleImage(java.awt.image.BufferedImage)
* @see #createCompatibleImage(java.awt.image.BufferedImage, int, int)
* @see #createCompatibleImage(int, int)
* @see #createCompatibleTranslucentImage(int, int)
* @see #loadCompatibleImage(java.net.URL)
* @param image the image to copy into a new compatible image
* @return a new compatible copy, with the
* same width and height and transparency and content, of <code>image</code>
*/
public static BufferedImage toCompatibleImage(BufferedImage image) {
if (image.getColorModel().equals(
getGraphicsConfiguration().getColorModel())) {
return image;
}
BufferedImage compatibleImage =
getGraphicsConfiguration().createCompatibleImage(
image.getWidth(), image.getHeight(),
image.getTransparency());
Graphics g = compatibleImage.getGraphics();
g.drawImage(image, 0, 0, null);
g.dispose();
return compatibleImage;
}
/**
* <p>Returns a thumbnail of a source image. <code>newSize</code> defines
* the length of the longest dimension of the thumbnail. The other
* dimension is then computed according to the dimensions ratio of the
* original picture.</p>
* <p>This method favors speed over quality. When the new size is less than
* half the longest dimension of the source image,
* {@link #createThumbnail(BufferedImage, int)} or
* {@link #createThumbnail(BufferedImage, int, int)} should be used instead
* to ensure the quality of the result without sacrificing too much
* performance.</p>
*
* @see #createThumbnailFast(java.awt.image.BufferedImage, int, int)
* @see #createThumbnail(java.awt.image.BufferedImage, int)
* @see #createThumbnail(java.awt.image.BufferedImage, int, int)
* @param image the source image
* @param newSize the length of the largest dimension of the thumbnail
* @return a new compatible <code>BufferedImage</code> containing a
* thumbnail of <code>image</code>
* @throws IllegalArgumentException if <code>newSize</code> is larger than
* the largest dimension of <code>image</code> or <= 0
*/
public static BufferedImage createThumbnailFast(BufferedImage image,
int newSize) {
float ratio;
int width = image.getWidth();
int height = image.getHeight();
if (width > height) {
if (newSize >= width) {
throw new IllegalArgumentException("newSize must be lower than" +
" the image width");
} else if (newSize <= 0) {
throw new IllegalArgumentException("newSize must" +
" be greater than 0");
}
ratio = (float) width / (float) height;
width = newSize;
height = (int) (newSize / ratio);
} else {
if (newSize >= height) {
throw new IllegalArgumentException("newSize must be lower than" +
" the image height");
} else if (newSize <= 0) {
throw new IllegalArgumentException("newSize must" +
" be greater than 0");
}
ratio = (float) height / (float) width;
height = newSize;
width = (int) (newSize / ratio);
}
BufferedImage temp = createCompatibleImage(image, width, height);
Graphics2D g2 = temp.createGraphics();
g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g2.drawImage(image, 0, 0, temp.getWidth(), temp.getHeight(), null);
g2.dispose();
return temp;
}
/**
* <p>Returns a thumbnail of a source image.</p>
* <p>This method favors speed over quality. When the new size is less than
* half the longest dimension of the source image,
* {@link #createThumbnail(BufferedImage, int)} or
* {@link #createThumbnail(BufferedImage, int, int)} should be used instead
* to ensure the quality of the result without sacrificing too much
* performance.</p>
*
* @see #createThumbnailFast(java.awt.image.BufferedImage, int)
* @see #createThumbnail(java.awt.image.BufferedImage, int)
* @see #createThumbnail(java.awt.image.BufferedImage, int, int)
* @param image the source image
* @param newWidth the width of the thumbnail
* @param newHeight the height of the thumbnail
* @return a new compatible <code>BufferedImage</code> containing a
* thumbnail of <code>image</code>
* @throws IllegalArgumentException if <code>newWidth</code> is larger than
* the width of <code>image</code> or if code>newHeight</code> is larger
* than the height of <code>image</code> or if one of the dimensions
* is <= 0
*/
public static BufferedImage createThumbnailFast(BufferedImage image,
int newWidth, int newHeight) {
if (newWidth >= image.getWidth() ||
newHeight >= image.getHeight()) {
throw new IllegalArgumentException("newWidth and newHeight cannot" +
" be greater than the image" +
" dimensions");
} else if (newWidth <= 0 || newHeight <= 0) {
throw new IllegalArgumentException("newWidth and newHeight must" +
" be greater than 0");
}
BufferedImage temp = createCompatibleImage(image, newWidth, newHeight);
Graphics2D g2 = temp.createGraphics();
g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g2.drawImage(image, 0, 0, temp.getWidth(), temp.getHeight(), null);
g2.dispose();
return temp;
}
/**
* <p>Returns a thumbnail of a source image. <code>newSize</code> defines
* the length of the longest dimension of the thumbnail. The other
* dimension is then computed according to the dimensions ratio of the
* original picture.</p>
* <p>This method offers a good trade-off between speed and quality.
* The result looks better than
* {@link #createThumbnailFast(java.awt.image.BufferedImage, int)} when
* the new size is less than half the longest dimension of the source
* image, yet the rendering speed is almost similar.</p>
*
* @see #createThumbnailFast(java.awt.image.BufferedImage, int, int)
* @see #createThumbnailFast(java.awt.image.BufferedImage, int)
* @see #createThumbnail(java.awt.image.BufferedImage, int, int)
* @param image the source image
* @param newSize the length of the largest dimension of the thumbnail
* @return a new compatible <code>BufferedImage</code> containing a
* thumbnail of <code>image</code>
* @throws IllegalArgumentException if <code>newSize</code> is larger than
* the largest dimension of <code>image</code> or <= 0
*/
public static BufferedImage createThumbnail(BufferedImage image,
int newSize) {
int width = image.getWidth();
int height = image.getHeight();
boolean isWidthGreater = width > height;
if (isWidthGreater) {
if (newSize >= width) {
throw new IllegalArgumentException("newSize must be lower than" +
" the image width");
}
} else if (newSize >= height) {
throw new IllegalArgumentException("newSize must be lower than" +
" the image height");
}
if (newSize <= 0) {
throw new IllegalArgumentException("newSize must" +
" be greater than 0");
}
float ratioWH = (float) width / (float) height;
float ratioHW = (float) height / (float) width;
BufferedImage thumb = image;
do {
if (isWidthGreater) {
width /= 2;
if (width < newSize) {
width = newSize;
}
height = (int) (width / ratioWH);
} else {
height /= 2;
if (height < newSize) {
height = newSize;
}
width = (int) (height / ratioHW);
}
BufferedImage temp = createCompatibleImage(image, width, height);
Graphics2D g2 = temp.createGraphics();
g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g2.drawImage(thumb, 0, 0, temp.getWidth(), temp.getHeight(), null);
g2.dispose();
thumb = temp;
} while (newSize != (isWidthGreater ? width : height));
return thumb;
}
/**
* <p>Returns a thumbnail of a source image.</p>
* <p>This method offers a good trade-off between speed and quality.
* The result looks better than
* {@link #createThumbnailFast(java.awt.image.BufferedImage, int)} when
* the new size is less than half the longest dimension of the source
* image, yet the rendering speed is almost similar.</p>
*
* @see #createThumbnailFast(java.awt.image.BufferedImage, int)
* @see #createThumbnailFast(java.awt.image.BufferedImage, int, int)
* @see #createThumbnail(java.awt.image.BufferedImage, int)
* @param image the source image
* @param newWidth the width of the thumbnail
* @param newHeight the height of the thumbnail
* @return a new compatible <code>BufferedImage</code> containing a
* thumbnail of <code>image</code>
* @throws IllegalArgumentException if <code>newWidth</code> is larger than
* the width of <code>image</code> or if code>newHeight</code> is larger
* than the height of <code>image or if one the dimensions is not > 0</code>
*/
public static BufferedImage createThumbnail(BufferedImage image,
int newWidth, int newHeight) {
int width = image.getWidth();
int height = image.getHeight();
if (newWidth >= width || newHeight >= height) {
throw new IllegalArgumentException("newWidth and newHeight cannot" +
" be greater than the image" +
" dimensions");
} else if (newWidth <= 0 || newHeight <= 0) {
throw new IllegalArgumentException("newWidth and newHeight must" +
" be greater than 0");
}
BufferedImage thumb = image;
do {
if (width > newWidth) {
width /= 2;
if (width < newWidth) {
width = newWidth;
}
}
if (height > newHeight) {
height /= 2;
if (height < newHeight) {
height = newHeight;
}
}
BufferedImage temp = createCompatibleImage(image, width, height);
Graphics2D g2 = temp.createGraphics();
g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g2.drawImage(thumb, 0, 0, temp.getWidth(), temp.getHeight(), null);
g2.dispose();
thumb = temp;
} while (width != newWidth || height != newHeight);
return thumb;
}
/**
* <p>Returns an array of pixels, stored as integers, from a
* <code>BufferedImage</code>. The pixels are grabbed from a rectangular
* area defined by a location and two dimensions. Calling this method on
* an image of type different from <code>BufferedImage.TYPE_INT_ARGB</code>
* and <code>BufferedImage.TYPE_INT_RGB</code> will unmanage the image.</p>
*
* @param img the source image
* @param x the x location at which to start grabbing pixels
* @param y the y location at which to start grabbing pixels
* @param w the width of the rectangle of pixels to grab
* @param h the height of the rectangle of pixels to grab
* @param pixels a pre-allocated array of pixels of size w*h; can be null
* @return <code>pixels</code> if non-null, a new array of integers
* otherwise
* @throws IllegalArgumentException is <code>pixels</code> is non-null and
* of length < w*h
*/
public static int[] getPixels(BufferedImage img,
int x, int y, int w, int h, int[] pixels) {
if (w == 0 || h == 0) {
return new int[0];
}
if (pixels == null) {
pixels = new int[w * h];
} else if (pixels.length < w * h) {
throw new IllegalArgumentException("pixels array must have a length" +
" >= w*h");
}
int imageType = img.getType();
if (imageType == BufferedImage.TYPE_INT_ARGB ||
imageType == BufferedImage.TYPE_INT_RGB) {
Raster raster = img.getRaster();
return (int[]) raster.getDataElements(x, y, w, h, pixels);
}
// Unmanages the image
return img.getRGB(x, y, w, h, pixels, 0, w);
}
/**
* <p>Writes a rectangular area of pixels in the destination
* <code>BufferedImage</code>. Calling this method on
* an image of type different from <code>BufferedImage.TYPE_INT_ARGB</code>
* and <code>BufferedImage.TYPE_INT_RGB</code> will unmanage the image.</p>
*
* @param img the destination image
* @param x the x location at which to start storing pixels
* @param y the y location at which to start storing pixels
* @param w the width of the rectangle of pixels to store
* @param h the height of the rectangle of pixels to store
* @param pixels an array of pixels, stored as integers
* @throws IllegalArgumentException is <code>pixels</code> is non-null and
* of length < w*h
*/
public static void setPixels(BufferedImage img,
int x, int y, int w, int h, int[] pixels) {
if (pixels == null || w == 0 || h == 0) {
return;
} else if (pixels.length < w * h) {
throw new IllegalArgumentException("pixels array must have a length" +
" >= w*h");
}
int imageType = img.getType();
if (imageType == BufferedImage.TYPE_INT_ARGB ||
imageType == BufferedImage.TYPE_INT_RGB) {
WritableRaster raster = img.getRaster();
raster.setDataElements(x, y, w, h, pixels);
} else {
// Unmanages the image
img.setRGB(x, y, w, h, pixels, 0, w);
}
}
}
/*
* Copyright (c) 2007, Romain Guy
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of the TimingFramework project nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* <p>A stack blur filter can be used to create an approximation of a
* gaussian blur. The approximation is controlled by the number of times the
* {@link org.jdesktop.swingx.image.FastBlurFilter} is applied onto the source
* picture. The default number of iterations, 3, provides a decent compromise
* between speed and rendering quality.</p>
* <p>The force of the blur can be controlled with a radius and the
* default radius is 3. Since the blur clamps values on the edges of the
* source picture, you might need to provide a picture with empty borders
* to avoid artifacts at the edges. The performance of this filter are
* independant from the radius.</p>
*
* @author Romain Guy <romain.guy@mac.com>
*/
class StackBlurFilter extends AbstractFilter {
private final int radius;
private final int iterations;
/**
* <p>Creates a new blur filter with a default radius of 3 and 3 iterations.</p>
*/
public StackBlurFilter() {
this(3, 3);
}
/**
* <p>Creates a new blur filter with the specified radius and 3 iterations.
* If the radius is lower than 1, a radius of 1 will be used automatically.</p>
*
* @param radius the radius, in pixels, of the blur
*/
public StackBlurFilter(int radius) {
this(radius, 3);
}
/**
* <p>Creates a new blur filter with the specified radius. If the radius
* is lower than 1, a radius of 1 will be used automatically. The number
* of iterations controls the approximation to a gaussian blur. If the
* number of iterations is lower than 1, one iteration will be used
* automatically.</p>
*
* @param radius the radius, in pixels, of the blur
* @param iterations the number of iterations to approximate a gaussian blur
*/
public StackBlurFilter(int radius, int iterations) {
if (radius < 1) {
radius = 1;
}
if (iterations < 1) {
iterations = 1;
}
this.radius = radius;
this.iterations = iterations;
}
/**
* <p>Returns the effective radius of the stack blur. If the radius of the
* blur is 1 and the stack iterations count is 3, then the effective blur
* radius is 1 * 3 = 3.</p>
* @return the number of iterations times the blur radius
*/
public int getEffectiveRadius() {
return getIterations() * getRadius();
}
/**
* <p>Returns the radius used by this filter, in pixels.</p>
*
* @return the radius of the blur
*/
public int getRadius() {
return radius;
}
/**
* <p>Returns the number of iterations used to approximate a gaussian
* blur.</p>
*
* @return the number of iterations used by this blur
*/
public int getIterations() {
return iterations;
}
/**
* {@inheritDoc}
*/
@Override
public BufferedImage filter(BufferedImage src, BufferedImage dst) {
int width = src.getWidth();
int height = src.getHeight();
if (dst == null) {
dst = createCompatibleDestImage(src, null);
}
int[] srcPixels = new int[width * height];
int[] dstPixels = new int[width * height];
GraphicsUtilities.getPixels(src, 0, 0, width, height, srcPixels);
for (int i = 0; i < iterations; i++) {
// horizontal pass
FastBlurFilter.blur(srcPixels, dstPixels, width, height, radius);
// vertical pass
FastBlurFilter.blur(dstPixels, srcPixels, height, width, radius);
}
// the result is now stored in srcPixels due to the 2nd pass
GraphicsUtilities.setPixels(dst, 0, 0, width, height, srcPixels);
return dst;
}
}
/*
* Copyright (c) 2007, Romain Guy
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of the TimingFramework project nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* <p>A fast blur filter can be used to blur pictures quickly. This filter is an
* implementation of the box blur algorithm. The blurs generated by this
* algorithm might show square artifacts, especially on pictures containing
* straight lines (rectangles, text, etc.) On most pictures though, the
* result will look very good.</p>
* <p>The force of the blur can be controlled with a radius and the
* default radius is 3. Since the blur clamps values on the edges of the
* source picture, you might need to provide a picture with empty borders
* to avoid artifacts at the edges. The performance of this filter are
* independant from the radius.</p>
*
* @author Romain Guy <romain.guy@mac.com>
*/
class FastBlurFilter extends AbstractFilter {
private final int radius;
/**
* <p>Creates a new blur filter with a default radius of 3.</p>
*/
public FastBlurFilter() {
this(3);
}
/**
* <p>Creates a new blur filter with the specified radius. If the radius
* is lower than 1, a radius of 1 will be used automatically.</p>
*
* @param radius the radius, in pixels, of the blur
*/
public FastBlurFilter(int radius) {
if (radius < 1) {
radius = 1;
}
this.radius = radius;
}
/**
* <p>Returns the radius used by this filter, in pixels.</p>
*
* @return the radius of the blur
*/
public int getRadius() {
return radius;
}
/**
* {@inheritDoc}
*/
@Override
public BufferedImage filter(BufferedImage src, BufferedImage dst) {
int width = src.getWidth();
int height = src.getHeight();
if (dst == null) {
dst = createCompatibleDestImage(src, null);
}
int[] srcPixels = new int[width * height];
int[] dstPixels = new int[width * height];
GraphicsUtilities.getPixels(src, 0, 0, width, height, srcPixels);
// horizontal pass
blur(srcPixels, dstPixels, width, height, radius);
// vertical pass
blur(dstPixels, srcPixels, height, width, radius);
// the result is now stored in srcPixels due to the 2nd pass
GraphicsUtilities.setPixels(dst, 0, 0, width, height, srcPixels);
return dst;
}
/**
* <p>Blurs the source pixels into the destination pixels. The force of
* the blur is specified by the radius which must be greater than 0.</p>
* <p>The source and destination pixels arrays are expected to be in the
* INT_ARGB format.</p>
*
* @param srcPixels the source pixels
* @param dstPixels the destination pixels
* @param width the width of the source picture
* @param height the height of the source picture
* @param radius the radius of the blur effect
*/
static void blur(int[] srcPixels, int[] dstPixels,
int width, int height, int radius) {
final int windowSize = radius * 2 + 1;
final int radiusPlusOne = radius + 1;
int sumAlpha;
int sumRed;
int sumGreen;
int sumBlue;
int srcIndex = 0;
int dstIndex;
int pixel;
int[] sumLookupTable = new int[256 * windowSize];
for (int i = 0; i < sumLookupTable.length; i++) {
sumLookupTable[i] = i / windowSize;
}
int[] indexLookupTable = new int[radiusPlusOne];
if (radius < width) {
for (int i = 0; i < indexLookupTable.length; i++) {
indexLookupTable[i] = i;
}
} else {
for (int i = 0; i < width; i++) {
indexLookupTable[i] = i;
}
for (int i = width; i < indexLookupTable.length; i++) {
indexLookupTable[i] = width - 1;
}
}
for (int y = 0; y < height; y++) {
sumAlpha = sumRed = sumGreen = sumBlue = 0;
dstIndex = y;
pixel = srcPixels[srcIndex];
sumAlpha += radiusPlusOne * ((pixel >> 24) & 0xFF);
sumRed += radiusPlusOne * ((pixel >> 16) & 0xFF);
sumGreen += radiusPlusOne * ((pixel >> 8) & 0xFF);
sumBlue += radiusPlusOne * ( pixel & 0xFF);
for (int i = 1; i <= radius; i++) {
pixel = srcPixels[srcIndex + indexLookupTable[i]];
sumAlpha += (pixel >> 24) & 0xFF;
sumRed += (pixel >> 16) & 0xFF;
sumGreen += (pixel >> 8) & 0xFF;
sumBlue += pixel & 0xFF;
}
for (int x = 0; x < width; x++) {
dstPixels[dstIndex] = sumLookupTable[sumAlpha] << 24 |
sumLookupTable[sumRed] << 16 |
sumLookupTable[sumGreen] << 8 |
sumLookupTable[sumBlue];
dstIndex += height;
int nextPixelIndex = x + radiusPlusOne;
if (nextPixelIndex >= width) {
nextPixelIndex = width - 1;
}
int previousPixelIndex = x - radius;
if (previousPixelIndex < 0) {
previousPixelIndex = 0;
}
int nextPixel = srcPixels[srcIndex + nextPixelIndex];
int previousPixel = srcPixels[srcIndex + previousPixelIndex];
sumAlpha += (nextPixel >> 24) & 0xFF;
sumAlpha -= (previousPixel >> 24) & 0xFF;
sumRed += (nextPixel >> 16) & 0xFF;
sumRed -= (previousPixel >> 16) & 0xFF;
sumGreen += (nextPixel >> 8) & 0xFF;
sumGreen -= (previousPixel >> 8) & 0xFF;
sumBlue += nextPixel & 0xFF;
sumBlue -= previousPixel & 0xFF;
}
srcIndex += width;
}
}
}
/*
* Copyright (c) 2007, Romain Guy
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of the TimingFramework project nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* <p>Provides an abstract implementation of the <code>BufferedImageOp</code>
* interface. This class can be used to created new image filters based
* on <code>BufferedImageOp</code>.</p>
*
* @author Romain Guy <romain.guy@mac.com>
*/
abstract class AbstractFilter implements BufferedImageOp {
public abstract BufferedImage filter(BufferedImage src, BufferedImage dest);
/**
* {@inheritDoc}
*/
public Rectangle2D getBounds2D(BufferedImage src) {
return new Rectangle(0, 0, src.getWidth(), src.getHeight());
}
/**
* {@inheritDoc}
*/
public BufferedImage createCompatibleDestImage(BufferedImage src,
ColorModel destCM) {
if (destCM == null) {
destCM = src.getColorModel();
}
return new BufferedImage(destCM,
destCM.createCompatibleWritableRaster(
src.getWidth(), src.getHeight()),
destCM.isAlphaPremultiplied(), null);
}
/**
* {@inheritDoc}
*/
public Point2D getPoint2D(Point2D srcPt, Point2D dstPt) {
return (Point2D) srcPt.clone();
}
/**
* {@inheritDoc}
*/
public RenderingHints getRenderingHints() {
return null;
}
}
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