Blend Composite Demo
import java.awt.AlphaComposite;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Composite;
import java.awt.CompositeContext;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsEnvironment;
import java.awt.RenderingHints;
import java.awt.Transparency;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import java.awt.image.ColorModel;
import java.awt.image.DataBuffer;
import java.awt.image.DirectColorModel;
import java.awt.image.Raster;
import java.awt.image.RasterFormatException;
import java.awt.image.WritableRaster;
import java.io.IOException;
import java.net.URL;
import javax.imageio.ImageIO;
import javax.swing.JComboBox;
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.graphics.BlendComposite}.
*
* @author Romain Guy <romain.guy@mac.com>
*/
public class BlendCompositeDemo extends JFrame {
private CompositeTestPanel compositeTestPanel;
private JComboBox combo;
private JSlider slider;
public BlendCompositeDemo() {
super("Blend Composites");
compositeTestPanel = new CompositeTestPanel();
compositeTestPanel.setComposite(BlendComposite.Average);
add(compositeTestPanel);
combo = new JComboBox(BlendComposite.BlendingMode.values());
combo.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
compositeTestPanel.setComposite(
BlendComposite.getInstance(
BlendComposite.BlendingMode.valueOf(combo.getSelectedItem().toString()),
slider.getValue() / 100.0f
));
}
});
slider = new JSlider(0, 100, 100);
slider.addChangeListener(new ChangeListener() {
public void stateChanged(ChangeEvent e) {
BlendComposite blend = (BlendComposite) compositeTestPanel.getComposite();
blend = blend.derive(slider.getValue() / 100.0f);
compositeTestPanel.setComposite(blend);
}
});
JPanel controls = new JPanel(new FlowLayout(FlowLayout.LEFT));
controls.add(combo);
controls.add(new JLabel("0%"));
controls.add(slider);
controls.add(new JLabel("100%"));
add(controls, BorderLayout.SOUTH);
pack();
setLocationRelativeTo(null);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
private static class CompositeTestPanel extends JPanel {
private BufferedImage image = null;
private Composite composite = AlphaComposite.Src;
private BufferedImage imageA;
private BufferedImage imageB;
private boolean repaint = false;
public CompositeTestPanel() {
setOpaque(false);
try {
imageA = GraphicsUtilities.loadCompatibleImage(getClass().getResource("A.jpg"));
imageB = GraphicsUtilities.loadCompatibleImage(getClass().getResource("B.jpg"));
} catch (IOException e) {
e.printStackTrace();
}
}
@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);
g2.drawImage(imageA, 0, 0, null);
g2.setComposite(getComposite());
g2.drawImage(imageB, 0, 0, null);
g2.dispose();
repaint = false;
}
int x = (getWidth() - image.getWidth()) / 2;
int y = (getHeight() - image.getHeight()) / 2;
g.drawImage(image, x, y, null);
}
public void setComposite(Composite composite) {
if (composite != null) {
this.composite = composite;
this.repaint = true;
repaint();
}
}
public Composite getComposite() {
return this.composite;
}
}
public static void main(String... args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new BlendCompositeDemo().setVisible(true);
}
});
}
}
/*
* $Id: BlendComposite.java,v 1.9 2007/02/28 01:21:29 gfx Exp $
*
* Dual-licensed under LGPL (Sun and Romain Guy) and BSD (Romain Guy).
*
* Copyright 2005 Sun Microsystems, Inc., 4150 Network Circle,
* Santa Clara, California 95054, U.S.A. All rights reserved.
*
* Copyright (c) 2006 Romain Guy <romain.guy@mac.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 blend composite defines the rule according to which a drawing primitive
* (known as the source) is mixed with existing graphics (know as the
* destination.)</p>
* <p><code>BlendComposite</code> is an implementation of the
* {@link java.awt.Composite} interface and must therefore be set as a state on
* a {@link java.awt.Graphics2D} surface.</p>
* <p>Please refer to {@link java.awt.Graphics2D#setComposite(java.awt.Composite)}
* for more information on how to use this class with a graphics surface.</p>
* <h2>Blending Modes</h2>
* <p>This class offers a certain number of blending modes, or compositing
* rules. These rules are inspired from graphics editing software packages,
* like <em>Adobe Photoshop</em> or <em>The GIMP</em>.</p>
* <p>Given the wide variety of implemented blending modes and the difficulty
* to describe them with words, please refer to those tools to visually see
* the result of these blending modes.</p>
* <h2>Opacity</h2>
* <p>Each blending mode has an associated opacity, defined as a float value
* between 0.0 and 1.0. Changing the opacity controls the force with which the
* compositing operation is applied. For instance, a composite with an opacity
* of 0.0 will not draw the source onto the destination. With an opacity of
* 1.0, the source will be fully drawn onto the destination, according to the
* selected blending mode rule.</p>
* <p>The opacity, or alpha value, is used by the composite instance to mutiply
* the alpha value of each pixel of the source when being composited over the
* destination.</p>
* <h2>Creating a Blend Composite</h2>
* <p>Blend composites can be created in various manners:</p>
* <ul>
* <li>Use one of the pre-defined instance. Example:
* <code>BlendComposite.Average</code>.</li>
* <li>Derive one of the pre-defined instances by calling
* {@link #derive(float)} or {@link #derive(BlendingMode)}. Deriving allows
* you to change either the opacity or the blending mode. Example:
* <code>BlendComposite.Average.derive(0.5f)</code>.</li>
* <li>Use a factory method: {@link #getInstance(BlendingMode)} or
* {@link #getInstance(BlendingMode, float)}.</li>
* </ul>
* <h2>Implementation Caveat</h2>
* <p>TThe blending mode <em>SoftLight</em> has not been implemented yet.</p>
*
* @see java.awt.Graphics2D
* @see java.awt.Composite
* @see java.awt.AlphaComposite
* @author Romain Guy <romain.guy@mac.com>
*/
final class BlendComposite implements Composite {
/**
* <p>A blending mode defines the compositing rule of a
* {@link BlendComposite}.</p>
*
* @author Romain Guy <romain.guy@mac.com>
*/
public enum BlendingMode {
AVERAGE,
MULTIPLY,
SCREEN,
DARKEN,
LIGHTEN,
OVERLAY,
HARD_LIGHT,
SOFT_LIGHT,
DIFFERENCE,
NEGATION,
EXCLUSION,
COLOR_DODGE,
INVERSE_COLOR_DODGE,
SOFT_DODGE,
COLOR_BURN,
INVERSE_COLOR_BURN,
SOFT_BURN,
REFLECT,
GLOW,
FREEZE,
HEAT,
ADD,
SUBTRACT,
STAMP,
RED,
GREEN,
BLUE,
HUE,
SATURATION,
COLOR,
LUMINOSITY
}
public static final BlendComposite Average = new BlendComposite(BlendingMode.AVERAGE);
public static final BlendComposite Multiply = new BlendComposite(BlendingMode.MULTIPLY);
public static final BlendComposite Screen = new BlendComposite(BlendingMode.SCREEN);
public static final BlendComposite Darken = new BlendComposite(BlendingMode.DARKEN);
public static final BlendComposite Lighten = new BlendComposite(BlendingMode.LIGHTEN);
public static final BlendComposite Overlay = new BlendComposite(BlendingMode.OVERLAY);
public static final BlendComposite HardLight = new BlendComposite(BlendingMode.HARD_LIGHT);
public static final BlendComposite SoftLight = new BlendComposite(BlendingMode.SOFT_LIGHT);
public static final BlendComposite Difference = new BlendComposite(BlendingMode.DIFFERENCE);
public static final BlendComposite Negation = new BlendComposite(BlendingMode.NEGATION);
public static final BlendComposite Exclusion = new BlendComposite(BlendingMode.EXCLUSION);
public static final BlendComposite ColorDodge = new BlendComposite(BlendingMode.COLOR_DODGE);
public static final BlendComposite InverseColorDodge = new BlendComposite(BlendingMode.INVERSE_COLOR_DODGE);
public static final BlendComposite SoftDodge = new BlendComposite(BlendingMode.SOFT_DODGE);
public static final BlendComposite ColorBurn = new BlendComposite(BlendingMode.COLOR_BURN);
public static final BlendComposite InverseColorBurn = new BlendComposite(BlendingMode.INVERSE_COLOR_BURN);
public static final BlendComposite SoftBurn = new BlendComposite(BlendingMode.SOFT_BURN);
public static final BlendComposite Reflect = new BlendComposite(BlendingMode.REFLECT);
public static final BlendComposite Glow = new BlendComposite(BlendingMode.GLOW);
public static final BlendComposite Freeze = new BlendComposite(BlendingMode.FREEZE);
public static final BlendComposite Heat = new BlendComposite(BlendingMode.HEAT);
public static final BlendComposite Add = new BlendComposite(BlendingMode.ADD);
public static final BlendComposite Subtract = new BlendComposite(BlendingMode.SUBTRACT);
public static final BlendComposite Stamp = new BlendComposite(BlendingMode.STAMP);
public static final BlendComposite Red = new BlendComposite(BlendingMode.RED);
public static final BlendComposite Green = new BlendComposite(BlendingMode.GREEN);
public static final BlendComposite Blue = new BlendComposite(BlendingMode.BLUE);
public static final BlendComposite Hue = new BlendComposite(BlendingMode.HUE);
public static final BlendComposite Saturation = new BlendComposite(BlendingMode.SATURATION);
public static final BlendComposite Color = new BlendComposite(BlendingMode.COLOR);
public static final BlendComposite Luminosity = new BlendComposite(BlendingMode.LUMINOSITY);
private final float alpha;
private final BlendingMode mode;
private BlendComposite(BlendingMode mode) {
this(mode, 1.0f);
}
private BlendComposite(BlendingMode mode, float alpha) {
this.mode = mode;
if (alpha < 0.0f || alpha > 1.0f) {
throw new IllegalArgumentException(
"alpha must be comprised between 0.0f and 1.0f");
}
this.alpha = alpha;
}
/**
* <p>Creates a new composite based on the blending mode passed
* as a parameter. A default opacity of 1.0 is applied.</p>
*
* @param mode the blending mode defining the compositing rule
* @return a new <code>BlendComposite</code> based on the selected blending
* mode, with an opacity of 1.0
*/
public static BlendComposite getInstance(BlendingMode mode) {
return new BlendComposite(mode);
}
/**
* <p>Creates a new composite based on the blending mode and opacity passed
* as parameters. The opacity must be a value between 0.0 and 1.0.</p>
*
* @param mode the blending mode defining the compositing rule
* @param alpha the constant alpha to be multiplied with the alpha of the
* source. <code>alpha</code> must be a floating point between 0.0 and 1.0.
* @throws IllegalArgumentException if the opacity is less than 0.0 or
* greater than 1.0
* @return a new <code>BlendComposite</code> based on the selected blending
* mode and opacity
*/
public static BlendComposite getInstance(BlendingMode mode, float alpha) {
return new BlendComposite(mode, alpha);
}
/**
* <p>Returns a <code>BlendComposite</code> object that uses the specified
* blending mode and this object's alpha value. If the newly specified
* blending mode is the same as this object's, this object is returned.</p>
*
* @param mode the blending mode defining the compositing rule
* @return a <code>BlendComposite</code> object derived from this object,
* that uses the specified blending mode
*/
public BlendComposite derive(BlendingMode mode) {
return this.mode == mode ? this : new BlendComposite(mode, getAlpha());
}
/**
* <p>Returns a <code>BlendComposite</code> object that uses the specified
* opacity, or alpha, and this object's blending mode. If the newly specified
* opacity is the same as this object's, this object is returned.</p>
*
* @param alpha the constant alpha to be multiplied with the alpha of the
* source. <code>alpha</code> must be a floating point between 0.0 and 1.0.
* @throws IllegalArgumentException if the opacity is less than 0.0 or
* greater than 1.0
* @return a <code>BlendComposite</code> object derived from this object,
* that uses the specified blending mode
*/
public BlendComposite derive(float alpha) {
return this.alpha == alpha ? this : new BlendComposite(getMode(), alpha);
}
/**
* <p>Returns the opacity of this composite. If no opacity has been defined,
* 1.0 is returned.</p>
*
* @return the alpha value, or opacity, of this object
*/
public float getAlpha() {
return alpha;
}
/**
* <p>Returns the blending mode of this composite.</p>
*
* @return the blending mode used by this object
*/
public BlendingMode getMode() {
return mode;
}
/**
* {@inheritDoc}
*/
@Override
public int hashCode() {
return Float.floatToIntBits(alpha) * 31 + mode.ordinal();
}
/**
* {@inheritDoc}
*/
@Override
public boolean equals(Object obj) {
if (!(obj instanceof BlendComposite)) {
return false;
}
BlendComposite bc = (BlendComposite) obj;
return mode == bc.mode && alpha == bc.alpha;
}
private static boolean checkComponentsOrder(ColorModel cm) {
if (cm instanceof DirectColorModel &&
cm.getTransferType() == DataBuffer.TYPE_INT) {
DirectColorModel directCM = (DirectColorModel) cm;
return directCM.getRedMask() == 0x00FF0000 &&
directCM.getGreenMask() == 0x0000FF00 &&
directCM.getBlueMask() == 0x000000FF &&
(directCM.getNumComponents() != 4 ||
directCM.getAlphaMask() == 0xFF000000);
}
return false;
}
/**
* {@inheritDoc}
*/
public CompositeContext createContext(ColorModel srcColorModel,
ColorModel dstColorModel,
RenderingHints hints) {
if (!checkComponentsOrder(srcColorModel) ||
!checkComponentsOrder(dstColorModel)) {
throw new RasterFormatException("Incompatible color models");
}
return new BlendingContext(this);
}
private static final class BlendingContext implements CompositeContext {
private final Blender blender;
private final BlendComposite composite;
private BlendingContext(BlendComposite composite) {
this.composite = composite;
this.blender = Blender.getBlenderFor(composite);
}
public void dispose() {
}
public void compose(Raster src, Raster dstIn, WritableRaster dstOut) {
int width = Math.min(src.getWidth(), dstIn.getWidth());
int height = Math.min(src.getHeight(), dstIn.getHeight());
float alpha = composite.getAlpha();
int[] result = new int[4];
int[] srcPixel = new int[4];
int[] dstPixel = new int[4];
int[] srcPixels = new int[width];
int[] dstPixels = new int[width];
for (int y = 0; y < height; y++) {
src.getDataElements(0, y, width, 1, srcPixels);
dstIn.getDataElements(0, y, width, 1, dstPixels);
for (int x = 0; x < width; x++) {
// pixels are stored as INT_ARGB
// our arrays are [R, G, B, A]
int pixel = srcPixels[x];
srcPixel[0] = (pixel >> 16) & 0xFF;
srcPixel[1] = (pixel >> 8) & 0xFF;
srcPixel[2] = (pixel ) & 0xFF;
srcPixel[3] = (pixel >> 24) & 0xFF;
pixel = dstPixels[x];
dstPixel[0] = (pixel >> 16) & 0xFF;
dstPixel[1] = (pixel >> 8) & 0xFF;
dstPixel[2] = (pixel ) & 0xFF;
dstPixel[3] = (pixel >> 24) & 0xFF;
blender.blend(srcPixel, dstPixel, result);
// mixes the result with the opacity
dstPixels[x] = ((int) (dstPixel[3] + (result[3] - dstPixel[3]) * alpha) & 0xFF) << 24 |
((int) (dstPixel[0] + (result[0] - dstPixel[0]) * alpha) & 0xFF) << 16 |
((int) (dstPixel[1] + (result[1] - dstPixel[1]) * alpha) & 0xFF) << 8 |
(int) (dstPixel[2] + (result[2] - dstPixel[2]) * alpha) & 0xFF;
}
dstOut.setDataElements(0, y, width, 1, dstPixels);
}
}
}
private static abstract class Blender {
public abstract void blend(int[] src, int[] dst, int[] result);
public static Blender getBlenderFor(BlendComposite composite) {
switch (composite.getMode()) {
case ADD:
return new Blender() {
@Override
public void blend(int[] src, int[] dst, int[] result) {
result[0] = Math.min(255, src[0] + dst[0]);
result[1] = Math.min(255, src[1] + dst[1]);
result[2] = Math.min(255, src[2] + dst[2]);
result[3] = Math.min(255, src[3] + dst[3]);
}
};
case AVERAGE:
return new Blender() {
@Override
public void blend(int[] src, int[] dst, int[] result) {
result[0] = (src[0] + dst[0]) >> 1;
result[1] = (src[1] + dst[1]) >> 1;
result[2] = (src[2] + dst[2]) >> 1;
result[3] = Math.min(255, src[3] + dst[3] - (src[3] * dst[3]) / 255);
}
};
case BLUE:
return new Blender() {
@Override
public void blend(int[] src, int[] dst, int[] result) {
result[0] = dst[0];
result[1] = src[1];
result[2] = dst[2];
result[3] = Math.min(255, src[3] + dst[3] - (src[3] * dst[3]) / 255);
}
};
case COLOR:
return new Blender() {
@Override
public void blend(int[] src, int[] dst, int[] result) {
float[] srcHSL = new float[3];
ColorUtilities.RGBtoHSL(src[0], src[1], src[2], srcHSL);
float[] dstHSL = new float[3];
ColorUtilities.RGBtoHSL(dst[0], dst[1], dst[2], dstHSL);
ColorUtilities.HSLtoRGB(srcHSL[0], srcHSL[1], dstHSL[2], result);
result[3] = Math.min(255, src[3] + dst[3] - (src[3] * dst[3]) / 255);
}
};
case COLOR_BURN:
return new Blender() {
@Override
public void blend(int[] src, int[] dst, int[] result) {
result[0] = src[0] == 0 ? 0 :
Math.max(0, 255 - (((255 - dst[0]) << 8) / src[0]));
result[1] = src[1] == 0 ? 0 :
Math.max(0, 255 - (((255 - dst[1]) << 8) / src[1]));
result[2] = src[2] == 0 ? 0 :
Math.max(0, 255 - (((255 - dst[2]) << 8) / src[2]));
result[3] = Math.min(255, src[3] + dst[3] - (src[3] * dst[3]) / 255);
}
};
case COLOR_DODGE:
return new Blender() {
@Override
public void blend(int[] src, int[] dst, int[] result) {
result[0] = src[0] == 255 ? 255 :
Math.min((dst[0] << 8) / (255 - src[0]), 255);
result[1] = src[1] == 255 ? 255 :
Math.min((dst[1] << 8) / (255 - src[1]), 255);
result[2] = src[2] == 255 ? 255 :
Math.min((dst[2] << 8) / (255 - src[2]), 255);
result[3] = Math.min(255, src[3] + dst[3] - (src[3] * dst[3]) / 255);
}
};
case DARKEN:
return new Blender() {
@Override
public void blend(int[] src, int[] dst, int[] result) {
result[0] = Math.min(src[0], dst[0]);
result[1] = Math.min(src[1], dst[1]);
result[2] = Math.min(src[2], dst[2]);
result[3] = Math.min(255, src[3] + dst[3] - (src[3] * dst[3]) / 255);
}
};
case DIFFERENCE:
return new Blender() {
@Override
public void blend(int[] src, int[] dst, int[] result) {
result[0] = Math.abs(dst[0] - src[0]);
result[1] = Math.abs(dst[1] - src[1]);
result[2] = Math.abs(dst[2] - src[2]);
result[3] = Math.min(255, src[3] + dst[3] - (src[3] * dst[3]) / 255);
}
};
case EXCLUSION:
return new Blender() {
@Override
public void blend(int[] src, int[] dst, int[] result) {
result[0] = dst[0] + src[0] - (dst[0] * src[0] >> 7);
result[1] = dst[1] + src[1] - (dst[1] * src[1] >> 7);
result[2] = dst[2] + src[2] - (dst[2] * src[2] >> 7);
result[3] = Math.min(255, src[3] + dst[3] - (src[3] * dst[3]) / 255);
}
};
case FREEZE:
return new Blender() {
@Override
public void blend(int[] src, int[] dst, int[] result) {
result[0] = src[0] == 0 ? 0 :
Math.max(0, 255 - (255 - dst[0]) * (255 - dst[0]) / src[0]);
result[1] = src[1] == 0 ? 0 :
Math.max(0, 255 - (255 - dst[1]) * (255 - dst[1]) / src[1]);
result[2] = src[2] == 0 ? 0 :
Math.max(0, 255 - (255 - dst[2]) * (255 - dst[2]) / src[2]);
result[3] = Math.min(255, src[3] + dst[3] - (src[3] * dst[3]) / 255);
}
};
case GLOW:
return new Blender() {
@Override
public void blend(int[] src, int[] dst, int[] result) {
result[0] = dst[0] == 255 ? 255 :
Math.min(255, src[0] * src[0] / (255 - dst[0]));
result[1] = dst[1] == 255 ? 255 :
Math.min(255, src[1] * src[1] / (255 - dst[1]));
result[2] = dst[2] == 255 ? 255 :
Math.min(255, src[2] * src[2] / (255 - dst[2]));
result[3] = Math.min(255, src[3] + dst[3] - (src[3] * dst[3]) / 255);
}
};
case GREEN:
return new Blender() {
@Override
public void blend(int[] src, int[] dst, int[] result) {
result[0] = dst[0];
result[1] = dst[1];
result[2] = src[2];
result[3] = Math.min(255, src[3] + dst[3] - (src[3] * dst[3]) / 255);
}
};
case HARD_LIGHT:
return new Blender() {
@Override
public void blend(int[] src, int[] dst, int[] result) {
result[0] = src[0] < 128 ? dst[0] * src[0] >> 7 :
255 - ((255 - src[0]) * (255 - dst[0]) >> 7);
result[1] = src[1] < 128 ? dst[1] * src[1] >> 7 :
255 - ((255 - src[1]) * (255 - dst[1]) >> 7);
result[2] = src[2] < 128 ? dst[2] * src[2] >> 7 :
255 - ((255 - src[2]) * (255 - dst[2]) >> 7);
result[3] = Math.min(255, src[3] + dst[3] - (src[3] * dst[3]) / 255);
}
};
case HEAT:
return new Blender() {
@Override
public void blend(int[] src, int[] dst, int[] result) {
result[0] = dst[0] == 0 ? 0 :
Math.max(0, 255 - (255 - src[0]) * (255 - src[0]) / dst[0]);
result[1] = dst[1] == 0 ? 0 :
Math.max(0, 255 - (255 - src[1]) * (255 - src[1]) / dst[1]);
result[2] = dst[2] == 0 ? 0 :
Math.max(0, 255 - (255 - src[2]) * (255 - src[2]) / dst[2]);
result[3] = Math.min(255, src[3] + dst[3] - (src[3] * dst[3]) / 255);
}
};
case HUE:
return new Blender() {
@Override
public void blend(int[] src, int[] dst, int[] result) {
float[] srcHSL = new float[3];
ColorUtilities.RGBtoHSL(src[0], src[1], src[2], srcHSL);
float[] dstHSL = new float[3];
ColorUtilities.RGBtoHSL(dst[0], dst[1], dst[2], dstHSL);
ColorUtilities.HSLtoRGB(srcHSL[0], dstHSL[1], dstHSL[2], result);
result[3] = Math.min(255, src[3] + dst[3] - (src[3] * dst[3]) / 255);
}
};
case INVERSE_COLOR_BURN:
return new Blender() {
@Override
public void blend(int[] src, int[] dst, int[] result) {
result[0] = dst[0] == 0 ? 0 :
Math.max(0, 255 - (((255 - src[0]) << 8) / dst[0]));
result[1] = dst[1] == 0 ? 0 :
Math.max(0, 255 - (((255 - src[1]) << 8) / dst[1]));
result[2] = dst[2] == 0 ? 0 :
Math.max(0, 255 - (((255 - src[2]) << 8) / dst[2]));
result[3] = Math.min(255, src[3] + dst[3] - (src[3] * dst[3]) / 255);
}
};
case INVERSE_COLOR_DODGE:
return new Blender() {
@Override
public void blend(int[] src, int[] dst, int[] result) {
result[0] = dst[0] == 255 ? 255 :
Math.min((src[0] << 8) / (255 - dst[0]), 255);
result[1] = dst[1] == 255 ? 255 :
Math.min((src[1] << 8) / (255 - dst[1]), 255);
result[2] = dst[2] == 255 ? 255 :
Math.min((src[2] << 8) / (255 - dst[2]), 255);
result[3] = Math.min(255, src[3] + dst[3] - (src[3] * dst[3]) / 255);
}
};
case LIGHTEN:
return new Blender() {
@Override
public void blend(int[] src, int[] dst, int[] result) {
result[0] = Math.max(src[0], dst[0]);
result[1] = Math.max(src[1], dst[1]);
result[2] = Math.max(src[2], dst[2]);
result[3] = Math.min(255, src[3] + dst[3] - (src[3] * dst[3]) / 255);
}
};
case LUMINOSITY:
return new Blender() {
@Override
public void blend(int[] src, int[] dst, int[] result) {
float[] srcHSL = new float[3];
ColorUtilities.RGBtoHSL(src[0], src[1], src[2], srcHSL);
float[] dstHSL = new float[3];
ColorUtilities.RGBtoHSL(dst[0], dst[1], dst[2], dstHSL);
ColorUtilities.HSLtoRGB(dstHSL[0], dstHSL[1], srcHSL[2], result);
result[3] = Math.min(255, src[3] + dst[3] - (src[3] * dst[3]) / 255);
}
};
case MULTIPLY:
return new Blender() {
@Override
public void blend(int[] src, int[] dst, int[] result) {
result[0] = (src[0] * dst[0]) >> 8;
result[1] = (src[1] * dst[1]) >> 8;
result[2] = (src[2] * dst[2]) >> 8;
result[3] = Math.min(255, src[3] + dst[3] - (src[3] * dst[3]) / 255);
}
};
case NEGATION:
return new Blender() {
@Override
public void blend(int[] src, int[] dst, int[] result) {
result[0] = 255 - Math.abs(255 - dst[0] - src[0]);
result[1] = 255 - Math.abs(255 - dst[1] - src[1]);
result[2] = 255 - Math.abs(255 - dst[2] - src[2]);
result[3] = Math.min(255, src[3] + dst[3] - (src[3] * dst[3]) / 255);
}
};
case OVERLAY:
return new Blender() {
@Override
public void blend(int[] src, int[] dst, int[] result) {
result[0] = dst[0] < 128 ? dst[0] * src[0] >> 7 :
255 - ((255 - dst[0]) * (255 - src[0]) >> 7);
result[1] = dst[1] < 128 ? dst[1] * src[1] >> 7 :
255 - ((255 - dst[1]) * (255 - src[1]) >> 7);
result[2] = dst[2] < 128 ? dst[2] * src[2] >> 7 :
255 - ((255 - dst[2]) * (255 - src[2]) >> 7);
result[3] = Math.min(255, src[3] + dst[3] - (src[3] * dst[3]) / 255);
}
};
case RED:
return new Blender() {
@Override
public void blend(int[] src, int[] dst, int[] result) {
result[0] = src[0];
result[1] = dst[1];
result[2] = dst[2];
result[3] = Math.min(255, src[3] + dst[3] - (src[3] * dst[3]) / 255);
}
};
case REFLECT:
return new Blender() {
@Override
public void blend(int[] src, int[] dst, int[] result) {
result[0] = src[0] == 255 ? 255 :
Math.min(255, dst[0] * dst[0] / (255 - src[0]));
result[1] = src[1] == 255 ? 255 :
Math.min(255, dst[1] * dst[1] / (255 - src[1]));
result[2] = src[2] == 255 ? 255 :
Math.min(255, dst[2] * dst[2] / (255 - src[2]));
result[3] = Math.min(255, src[3] + dst[3] - (src[3] * dst[3]) / 255);
}
};
case SATURATION:
return new Blender() {
@Override
public void blend(int[] src, int[] dst, int[] result) {
float[] srcHSL = new float[3];
ColorUtilities.RGBtoHSL(src[0], src[1], src[2], srcHSL);
float[] dstHSL = new float[3];
ColorUtilities.RGBtoHSL(dst[0], dst[1], dst[2], dstHSL);
ColorUtilities.HSLtoRGB(dstHSL[0], srcHSL[1], dstHSL[2], result);
result[3] = Math.min(255, src[3] + dst[3] - (src[3] * dst[3]) / 255);
}
};
case SCREEN:
return new Blender() {
@Override
public void blend(int[] src, int[] dst, int[] result) {
result[0] = 255 - ((255 - src[0]) * (255 - dst[0]) >> 8);
result[1] = 255 - ((255 - src[1]) * (255 - dst[1]) >> 8);
result[2] = 255 - ((255 - src[2]) * (255 - dst[2]) >> 8);
result[3] = Math.min(255, src[3] + dst[3] - (src[3] * dst[3]) / 255);
}
};
case SOFT_BURN:
return new Blender() {
@Override
public void blend(int[] src, int[] dst, int[] result) {
result[0] = dst[0] + src[0] < 256 ?
(dst[0] == 255 ? 255 :
Math.min(255, (src[0] << 7) / (255 - dst[0]))) :
Math.max(0, 255 - (((255 - dst[0]) << 7) / src[0]));
result[1] = dst[1] + src[1] < 256 ?
(dst[1] == 255 ? 255 :
Math.min(255, (src[1] << 7) / (255 - dst[1]))) :
Math.max(0, 255 - (((255 - dst[1]) << 7) / src[1]));
result[2] = dst[2] + src[2] < 256 ?
(dst[2] == 255 ? 255 :
Math.min(255, (src[2] << 7) / (255 - dst[2]))) :
Math.max(0, 255 - (((255 - dst[2]) << 7) / src[2]));
result[3] = Math.min(255, src[3] + dst[3] - (src[3] * dst[3]) / 255);
}
};
case SOFT_DODGE:
return new Blender() {
@Override
public void blend(int[] src, int[] dst, int[] result) {
result[0] = dst[0] + src[0] < 256 ?
(src[0] == 255 ? 255 :
Math.min(255, (dst[0] << 7) / (255 - src[0]))) :
Math.max(0, 255 - (((255 - src[0]) << 7) / dst[0]));
result[1] = dst[1] + src[1] < 256 ?
(src[1] == 255 ? 255 :
Math.min(255, (dst[1] << 7) / (255 - src[1]))) :
Math.max(0, 255 - (((255 - src[1]) << 7) / dst[1]));
result[2] = dst[2] + src[2] < 256 ?
(src[2] == 255 ? 255 :
Math.min(255, (dst[2] << 7) / (255 - src[2]))) :
Math.max(0, 255 - (((255 - src[2]) << 7) / dst[2]));
result[3] = Math.min(255, src[3] + dst[3] - (src[3] * dst[3]) / 255);
}
};
case SOFT_LIGHT:
return new Blender() {
@Override
public void blend(int[] src, int[] dst, int[] result) {
int mRed = src[0] * dst[0] / 255;
int mGreen = src[1] * dst[1] / 255;
int mBlue = src[2] * dst[2] / 255;
result[0] = mRed + src[0] * (255 - ((255 - src[0]) * (255 - dst[0]) / 255) - mRed) / 255;
result[1] = mGreen + src[1] * (255 - ((255 - src[1]) * (255 - dst[1]) / 255) - mGreen) / 255;
result[2] = mBlue + src[2] * (255 - ((255 - src[2]) * (255 - dst[2]) / 255) - mBlue) / 255;
result[3] = Math.min(255, src[3] + dst[3] - (src[3] * dst[3]) / 255);
}
};
case STAMP:
return new Blender() {
@Override
public void blend(int[] src, int[] dst, int[] result) {
result[0] = Math.max(0, Math.min(255, dst[0] + 2 * src[0] - 256));
result[1] = Math.max(0, Math.min(255, dst[1] + 2 * src[1] - 256));
result[2] = Math.max(0, Math.min(255, dst[2] + 2 * src[2] - 256));
result[3] = Math.min(255, src[3] + dst[3] - (src[3] * dst[3]) / 255);
}
};
case SUBTRACT:
return new Blender() {
@Override
public void blend(int[] src, int[] dst, int[] result) {
result[0] = Math.max(0, src[0] + dst[0] - 256);
result[1] = Math.max(0, src[1] + dst[1] - 256);
result[2] = Math.max(0, src[2] + dst[2] - 256);
result[3] = Math.min(255, src[3] + dst[3] - (src[3] * dst[3]) / 255);
}
};
}
throw new IllegalArgumentException("Blender not implemented for " +
composite.getMode().name());
}
}
}
/*
* $Id: GraphicsUtilities.java,v 1.1 2006/12/15 13:53:13 gfx Exp $
*
* Dual-licensed under LGPL (Sun and Romain Guy) and BSD (Romain Guy).
*
* Copyright 2005 Sun Microsystems, Inc., 4150 Network Circle,
* Santa Clara, California 95054, U.S.A. All rights reserved.
*
* Copyright (c) 2006 Romain Guy <romain.guy@mac.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 static final GraphicsConfiguration CONFIGURATION =
GraphicsEnvironment.getLocalGraphicsEnvironment().
getDefaultScreenDevice().getDefaultConfiguration();
private GraphicsUtilities() {
}
/**
* <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 #createTranslucentCompatibleImage(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 #createTranslucentCompatibleImage(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 CONFIGURATION.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 #createTranslucentCompatibleImage(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 CONFIGURATION.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 createTranslucentCompatibleImage(int width,
int height) {
return CONFIGURATION.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 #createTranslucentCompatibleImage(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 #createTranslucentCompatibleImage(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(CONFIGURATION.getColorModel())) {
return image;
}
BufferedImage compatibleImage = CONFIGURATION.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);
}
}
}
/*
* $Id: ColorUtilities.java,v 1.1 2006/12/15 13:53:13 gfx Exp $
*
* Dual-licensed under LGPL (Sun and Romain Guy) and BSD (Romain Guy).
*
* Copyright 2006 Sun Microsystems, Inc., 4150 Network Circle,
* Santa Clara, California 95054, U.S.A. All rights reserved.
*
* Copyright (c) 2006 Romain Guy <romain.guy@mac.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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>ColorUtilities</code> contains a set of tools to perform
* common color operations easily.</p>
*
* @author Romain Guy <romain.guy@mac.com>
*/
class ColorUtilities {
private ColorUtilities() {
}
/**
* <p>Returns the HSL (Hue/Saturation/Luminance) equivalent of a given
* RGB color. All three HSL components are between 0.0 and 1.0.</p>
*
* @param color the RGB color to convert
* @return a new array of 3 floats corresponding to the HSL components
*/
public static float[] RGBtoHSL(Color color) {
return RGBtoHSL(color.getRed(), color.getGreen(), color.getBlue(), null);
}
/**
* <p>Returns the HSL (Hue/Saturation/Luminance) equivalent of a given
* RGB color. All three HSL components are between 0.0 and 1.0.</p>
*
* @param color the RGB color to convert
* @param hsl a pre-allocated array of floats; can be null
* @return <code>hsl</code> if non-null, a new array of 3 floats otherwise
* @throws IllegalArgumentException if <code>hsl</code> has a length lower
* than 3
*/
public static float[] RGBtoHSL(Color color, float[] hsl) {
return RGBtoHSL(color.getRed(), color.getGreen(), color.getBlue(), hsl);
}
/**
* <p>Returns the HSL (Hue/Saturation/Luminance) equivalent of a given
* RGB color. All three HSL components are between 0.0 and 1.0.</p>
*
* @param r the red component, between 0 and 255
* @param g the green component, between 0 and 255
* @param b the blue component, between 0 and 255
* @return a new array of 3 floats corresponding to the HSL components
*/
public static float[] RGBtoHSL(int r, int g, int b) {
return RGBtoHSL(r, g, b, null);
}
/**
* <p>Returns the HSL (Hue/Saturation/Luminance) equivalent of a given
* RGB color. All three HSL components are floats between 0.0 and 1.0.</p>
*
* @param r the red component, between 0 and 255
* @param g the green component, between 0 and 255
* @param b the blue component, between 0 and 255
* @param hsl a pre-allocated array of floats; can be null
* @return <code>hsl</code> if non-null, a new array of 3 floats otherwise
* @throws IllegalArgumentException if <code>hsl</code> has a length lower
* than 3
*/
public static float[] RGBtoHSL(int r, int g, int b, float[] hsl) {
if (hsl == null) {
hsl = new float[3];
} else if (hsl.length < 3) {
throw new IllegalArgumentException("hsl array must have a length of" +
" at least 3");
}
if (r < 0) r = 0;
else if (r > 255) r = 255;
if (g < 0) g = 0;
else if (g > 255) g = 255;
if (b < 0) b = 0;
else if (b > 255) b = 255;
float var_R = (r / 255f);
float var_G = (g / 255f);
float var_B = (b / 255f);
float var_Min;
float var_Max;
float del_Max;
if (var_R > var_G) {
var_Min = var_G;
var_Max = var_R;
} else {
var_Min = var_R;
var_Max = var_G;
}
if (var_B > var_Max) {
var_Max = var_B;
}
if (var_B < var_Min) {
var_Min = var_B;
}
del_Max = var_Max - var_Min;
float H, S, L;
L = (var_Max + var_Min) / 2f;
if (del_Max - 0.01f <= 0.0f) {
H = 0;
S = 0;
} else {
if (L < 0.5f) {
S = del_Max / (var_Max + var_Min);
} else {
S = del_Max / (2 - var_Max - var_Min);
}
float del_R = (((var_Max - var_R) / 6f) + (del_Max / 2f)) / del_Max;
float del_G = (((var_Max - var_G) / 6f) + (del_Max / 2f)) / del_Max;
float del_B = (((var_Max - var_B) / 6f) + (del_Max / 2f)) / del_Max;
if (var_R == var_Max) {
H = del_B - del_G;
} else if (var_G == var_Max) {
H = (1 / 3f) + del_R - del_B;
} else {
H = (2 / 3f) + del_G - del_R;
}
if (H < 0) {
H += 1;
}
if (H > 1) {
H -= 1;
}
}
hsl[0] = H;
hsl[1] = S;
hsl[2] = L;
return hsl;
}
/**
* <p>Returns the RGB equivalent of a given HSL (Hue/Saturation/Luminance)
* color.</p>
*
* @param h the hue component, between 0.0 and 1.0
* @param s the saturation component, between 0.0 and 1.0
* @param l the luminance component, between 0.0 and 1.0
* @return a new <code>Color</code> object equivalent to the HSL components
*/
public static Color HSLtoRGB(float h, float s, float l) {
int[] rgb = HSLtoRGB(h, s, l, null);
return new Color(rgb[0], rgb[1], rgb[2]);
}
/**
* <p>Returns the RGB equivalent of a given HSL (Hue/Saturation/Luminance)
* color. All three RGB components are integers between 0 and 255.</p>
*
* @param h the hue component, between 0.0 and 1.0
* @param s the saturation component, between 0.0 and 1.0
* @param l the luminance component, between 0.0 and 1.0
* @param rgb a pre-allocated array of ints; can be null
* @return <code>rgb</code> if non-null, a new array of 3 ints otherwise
* @throws IllegalArgumentException if <code>rgb</code> has a length lower
* than 3
*/
public static int[] HSLtoRGB(float h, float s, float l, int[] rgb) {
if (rgb == null) {
rgb = new int[3];
} else if (rgb.length < 3) {
throw new IllegalArgumentException("rgb array must have a length of" +
" at least 3");
}
if (h < 0) h = 0.0f;
else if (h > 1.0f) h = 1.0f;
if (s < 0) s = 0.0f;
else if (s > 1.0f) s = 1.0f;
if (l < 0) l = 0.0f;
else if (l > 1.0f) l = 1.0f;
int R, G, B;
if (s - 0.01f <= 0.0f) {
R = (int) (l * 255.0f);
G = (int) (l * 255.0f);
B = (int) (l * 255.0f);
} else {
float var_1, var_2;
if (l < 0.5f) {
var_2 = l * (1 + s);
} else {
var_2 = (l + s) - (s * l);
}
var_1 = 2 * l - var_2;
R = (int) (255.0f * hue2RGB(var_1, var_2, h + (1.0f / 3.0f)));
G = (int) (255.0f * hue2RGB(var_1, var_2, h));
B = (int) (255.0f * hue2RGB(var_1, var_2, h - (1.0f / 3.0f)));
}
rgb[0] = R;
rgb[1] = G;
rgb[2] = B;
return rgb;
}
private static float hue2RGB(float v1, float v2, float vH) {
if (vH < 0.0f) {
vH += 1.0f;
}
if (vH > 1.0f) {
vH -= 1.0f;
}
if ((6.0f * vH) < 1.0f) {
return (v1 + (v2 - v1) * 6.0f * vH);
}
if ((2.0f * vH) < 1.0f) {
return (v2);
}
if ((3.0f * vH) < 2.0f) {
return (v1 + (v2 - v1) * ((2.0f / 3.0f) - vH) * 6.0f);
}
return (v1);
}
}
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