/*
* $Id: BlendComposite.java 3471 2009-08-27 13:10:39Z kleopatra $
*
* 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.
*/
package org.jdesktop.swingx.graphics;
import java.awt.Composite;
import java.awt.CompositeContext;
import java.awt.RenderingHints;
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;
/**
* <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 org.jdesktop.swingx.graphics.BlendComposite.BlendingMode
* @see java.awt.Graphics2D
* @see java.awt.Composite
* @see java.awt.AlphaComposite
* @author Romain Guy <romain.guy@mac.com>
*/
public final class BlendComposite implements Composite {
/**
* <p>A blending mode defines the compositing rule of a
* {@link org.jdesktop.swingx.graphics.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 isRgbColorModel(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() == 3 ||
directCM.getAlphaMask() == 0xFF000000);
}
return false;
}
private static boolean isBgrColorModel(ColorModel cm) {
if (cm instanceof DirectColorModel &&
cm.getTransferType() == DataBuffer.TYPE_INT) {
DirectColorModel directCM = (DirectColorModel) cm;
return directCM.getRedMask() == 0x000000FF &&
directCM.getGreenMask() == 0x0000FF00 &&
directCM.getBlueMask() == 0x00FF0000 &&
(directCM.getNumComponents() == 3 ||
directCM.getAlphaMask() == 0xFF000000);
}
return false;
}
/**
* {@inheritDoc}
*/
public CompositeContext createContext(ColorModel srcColorModel,
ColorModel dstColorModel,
RenderingHints hints) {
if (isRgbColorModel(srcColorModel) && isRgbColorModel(dstColorModel)) {
return new BlendingRgbContext(this);
} else if (isBgrColorModel(srcColorModel) && isBgrColorModel(dstColorModel)) {
return new BlendingBgrContext(this);
}
throw new RasterFormatException("Incompatible color models");
}
private static abstract class BlendingContext implements CompositeContext {
protected final Blender blender;
protected final BlendComposite composite;
private BlendingContext(BlendComposite composite) {
this.composite = composite;
this.blender = Blender.getBlenderFor(composite);
}
public void dispose() {
}
}
private static class BlendingRgbContext extends BlendingContext {
private BlendingRgbContext(BlendComposite composite) {
super(composite);
}
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 class BlendingBgrContext extends BlendingContext {
private BlendingBgrContext(BlendComposite composite) {
super(composite);
}
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_ABGR
// our arrays are [R, G, B, A]
int pixel = srcPixels[x];
srcPixel[0] = (pixel ) & 0xFF;
srcPixel[1] = (pixel >> 8) & 0xFF;
srcPixel[2] = (pixel >> 16) & 0xFF;
srcPixel[3] = (pixel >> 24) & 0xFF;
pixel = dstPixels[x];
dstPixel[0] = (pixel ) & 0xFF;
dstPixel[1] = (pixel >> 8) & 0xFF;
dstPixel[2] = (pixel >> 16) & 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) |
((int) (dstPixel[1] + (result[1] - dstPixel[1]) * alpha) & 0xFF) << 8 |
((int) (dstPixel[2] + (result[2] - dstPixel[2]) * alpha) & 0xFF) << 16;
}
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());
}
}
}