/*
* 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 er.attachment.thumbnail;
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.Raster;
import java.awt.image.WritableRaster;
public final class BlendComposite implements Composite {
public enum BlendingMode {
NORMAL,
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 Normal = new BlendComposite(BlendingMode.NORMAL);
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 float alpha;
private BlendingMode mode;
private BlendComposite(BlendingMode mode) {
this(mode, 1.0f);
}
private BlendComposite(BlendingMode mode, float alpha) {
this.mode = mode;
setAlpha(alpha);
}
public static BlendComposite getInstance(BlendingMode mode) {
return new BlendComposite(mode);
}
public static BlendComposite getInstance(BlendingMode mode, float alpha) {
return new BlendComposite(mode, alpha);
}
public BlendComposite derive(BlendingMode mode) {
return this.mode == mode ? this : new BlendComposite(mode, getAlpha());
}
public BlendComposite derive(float alpha) {
return this.alpha == alpha ? this : new BlendComposite(getMode(), alpha);
}
public float getAlpha() {
return alpha;
}
public BlendingMode getMode() {
return mode;
}
private void setAlpha(float alpha) {
if (alpha < 0.0f || alpha > 1.0f) {
throw new IllegalArgumentException(
"alpha must be comprised between 0.0f and 1.0f");
}
this.alpha = alpha;
}
@Override
public int hashCode() {
return Float.floatToIntBits(alpha) * 31 + mode.ordinal();
}
@Override
public boolean equals(Object obj) {
if (!(obj instanceof BlendComposite)) {
return false;
}
BlendComposite bc = (BlendComposite) obj;
if (mode != bc.mode) {
return false;
}
return alpha == bc.alpha;
}
public CompositeContext createContext(ColorModel srcColorModel,
ColorModel dstColorModel,
RenderingHints hints) {
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;
blender = Blender.getBlenderFor(composite);
}
public void dispose() {
}
public void compose(Raster src, Raster dstIn, WritableRaster dstOut) {
if (src.getSampleModel().getDataType() != DataBuffer.TYPE_INT ||
dstIn.getSampleModel().getDataType() != DataBuffer.TYPE_INT ||
dstOut.getSampleModel().getDataType() != DataBuffer.TYPE_INT) {
throw new IllegalStateException(
"Source and destination must store pixels as INT.");
}
int width = Math.min(src.getWidth(), dstIn.getWidth());
int height = Math.min(src.getHeight(), dstIn.getHeight());
float alpha = composite.getAlpha();
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;
int[] result = blender.blend(srcPixel, dstPixel);
// 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 int[] blend(int[] src, int[] dst);
private static void RGBtoHSL(int r, int g, int b, float[] hsl) {
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;
}
private static void HSLtoRGB(float h, float s, float l, int[] rgb) {
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;
}
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);
}
public static Blender getBlenderFor(BlendComposite composite) {
switch (composite.getMode()) {
case NORMAL:
return new Blender() {
@Override
public int[] blend(int[] src, int[] dst) {
return src;
}
};
case ADD:
return new Blender() {
@Override
public int[] blend(int[] src, int[] dst) {
return new int[] {
Math.min(255, src[0] + dst[0]),
Math.min(255, src[1] + dst[1]),
Math.min(255, src[2] + dst[2]),
Math.min(255, src[3] + dst[3])
};
}
};
case AVERAGE:
return new Blender() {
@Override
public int[] blend(int[] src, int[] dst) {
return new int[] {
(src[0] + dst[0]) >> 1,
(src[1] + dst[1]) >> 1,
(src[2] + dst[2]) >> 1,
Math.min(255, src[3] + dst[3])
};
}
};
case BLUE:
return new Blender() {
@Override
public int[] blend(int[] src, int[] dst) {
return new int[] {
dst[0],
src[1],
dst[2],
Math.min(255, src[3] + dst[3])
};
}
};
case COLOR:
return new Blender() {
@Override
public int[] blend(int[] src, int[] dst) {
float[] srcHSL = new float[3];
RGBtoHSL(src[0], src[1], src[2], srcHSL);
float[] dstHSL = new float[3];
RGBtoHSL(dst[0], dst[1], dst[2], dstHSL);
int[] result = new int[4];
HSLtoRGB(srcHSL[0], srcHSL[1], dstHSL[2], result);
result[3] = Math.min(255, src[3] + dst[3]);
return result;
}
};
case COLOR_BURN:
return new Blender() {
@Override
public int[] blend(int[] src, int[] dst) {
return new int[] {
src[0] == 0 ? 0 :
Math.max(0, 255 - (((255 - dst[0]) << 8) / src[0])),
src[1] == 0 ? 0 :
Math.max(0, 255 - (((255 - dst[1]) << 8) / src[1])),
src[2] == 0 ? 0 :
Math.max(0, 255 - (((255 - dst[2]) << 8) / src[2])),
Math.min(255, src[3] + dst[3])
};
}
};
case COLOR_DODGE:
return new Blender() {
@Override
public int[] blend(int[] src, int[] dst) {
return new int[] {
src[0] == 255 ? 255 :
Math.min((dst[0] << 8) / (255 - src[0]), 255),
src[1] == 255 ? 255 :
Math.min((dst[1] << 8) / (255 - src[1]), 255),
src[2] == 255 ? 255 :
Math.min((dst[2] << 8) / (255 - src[2]), 255),
Math.min(255, src[3] + dst[3])
};
}
};
case DARKEN:
return new Blender() {
@Override
public int[] blend(int[] src, int[] dst) {
return new int[] {
Math.min(src[0], dst[0]),
Math.min(src[1], dst[1]),
Math.min(src[2], dst[2]),
Math.min(255, src[3] + dst[3])
};
}
};
case DIFFERENCE:
return new Blender() {
@Override
public int[] blend(int[] src, int[] dst) {
return new int[] {
Math.abs(dst[0] - src[0]),
Math.abs(dst[1] - src[1]),
Math.abs(dst[2] - src[2]),
Math.min(255, src[3] + dst[3])
};
}
};
case EXCLUSION:
return new Blender() {
@Override
public int[] blend(int[] src, int[] dst) {
return new int[] {
dst[0] + src[0] - (dst[0] * src[0] >> 7),
dst[1] + src[1] - (dst[1] * src[1] >> 7),
dst[2] + src[2] - (dst[2] * src[2] >> 7),
Math.min(255, src[3] + dst[3])
};
}
};
case FREEZE:
return new Blender() {
@Override
public int[] blend(int[] src, int[] dst) {
return new int[] {
src[0] == 0 ? 0 : Math.max(0, 255 - (255 - dst[0]) * (255 - dst[0]) / src[0]),
src[1] == 0 ? 0 : Math.max(0, 255 - (255 - dst[1]) * (255 - dst[1]) / src[1]),
src[2] == 0 ? 0 : Math.max(0, 255 - (255 - dst[2]) * (255 - dst[2]) / src[2]),
Math.min(255, src[3] + dst[3])
};
}
};
case GLOW:
return new Blender() {
@Override
public int[] blend(int[] src, int[] dst) {
return new int[] {
dst[0] == 255 ? 255 : Math.min(255, src[0] * src[0] / (255 - dst[0])),
dst[1] == 255 ? 255 : Math.min(255, src[1] * src[1] / (255 - dst[1])),
dst[2] == 255 ? 255 : Math.min(255, src[2] * src[2] / (255 - dst[2])),
Math.min(255, src[3] + dst[3])
};
}
};
case GREEN:
return new Blender() {
@Override
public int[] blend(int[] src, int[] dst) {
return new int[] {
dst[0],
dst[1],
src[2],
Math.min(255, src[3] + dst[3])
};
}
};
case HARD_LIGHT:
return new Blender() {
@Override
public int[] blend(int[] src, int[] dst) {
return new int[] {
src[0] < 128 ? dst[0] * src[0] >> 7 :
255 - ((255 - src[0]) * (255 - dst[0]) >> 7),
src[1] < 128 ? dst[1] * src[1] >> 7 :
255 - ((255 - src[1]) * (255 - dst[1]) >> 7),
src[2] < 128 ? dst[2] * src[2] >> 7 :
255 - ((255 - src[2]) * (255 - dst[2]) >> 7),
Math.min(255, src[3] + dst[3])
};
}
};
case HEAT:
return new Blender() {
@Override
public int[] blend(int[] src, int[] dst) {
return new int[] {
dst[0] == 0 ? 0 : Math.max(0, 255 - (255 - src[0]) * (255 - src[0]) / dst[0]),
dst[1] == 0 ? 0 : Math.max(0, 255 - (255 - src[1]) * (255 - src[1]) / dst[1]),
dst[2] == 0 ? 0 : Math.max(0, 255 - (255 - src[2]) * (255 - src[2]) / dst[2]),
Math.min(255, src[3] + dst[3])
};
}
};
case HUE:
return new Blender() {
@Override
public int[] blend(int[] src, int[] dst) {
float[] srcHSL = new float[3];
RGBtoHSL(src[0], src[1], src[2], srcHSL);
float[] dstHSL = new float[3];
RGBtoHSL(dst[0], dst[1], dst[2], dstHSL);
int[] result = new int[4];
HSLtoRGB(srcHSL[0], dstHSL[1], dstHSL[2], result);
result[3] = Math.min(255, src[3] + dst[3]);
return result;
}
};
case INVERSE_COLOR_BURN:
return new Blender() {
@Override
public int[] blend(int[] src, int[] dst) {
return new int[] {
dst[0] == 0 ? 0 :
Math.max(0, 255 - (((255 - src[0]) << 8) / dst[0])),
dst[1] == 0 ? 0 :
Math.max(0, 255 - (((255 - src[1]) << 8) / dst[1])),
dst[2] == 0 ? 0 :
Math.max(0, 255 - (((255 - src[2]) << 8) / dst[2])),
Math.min(255, src[3] + dst[3])
};
}
};
case INVERSE_COLOR_DODGE:
return new Blender() {
@Override
public int[] blend(int[] src, int[] dst) {
return new int[] {
dst[0] == 255 ? 255 :
Math.min((src[0] << 8) / (255 - dst[0]), 255),
dst[1] == 255 ? 255 :
Math.min((src[1] << 8) / (255 - dst[1]), 255),
dst[2] == 255 ? 255 :
Math.min((src[2] << 8) / (255 - dst[2]), 255),
Math.min(255, src[3] + dst[3])
};
}
};
case LIGHTEN:
return new Blender() {
@Override
public int[] blend(int[] src, int[] dst) {
return new int[] {
Math.max(src[0], dst[0]),
Math.max(src[1], dst[1]),
Math.max(src[2], dst[2]),
Math.min(255, src[3] + dst[3])
};
}
};
case LUMINOSITY:
return new Blender() {
@Override
public int[] blend(int[] src, int[] dst) {
float[] srcHSL = new float[3];
RGBtoHSL(src[0], src[1], src[2], srcHSL);
float[] dstHSL = new float[3];
RGBtoHSL(dst[0], dst[1], dst[2], dstHSL);
int[] result = new int[4];
HSLtoRGB(dstHSL[0], dstHSL[1], srcHSL[2], result);
result[3] = Math.min(255, src[3] + dst[3]);
return result;
}
};
case MULTIPLY:
return new Blender() {
@Override
public int[] blend(int[] src, int[] dst) {
return new int[] {
(src[0] * dst[0]) >> 8,
(src[1] * dst[1]) >> 8,
(src[2] * dst[2]) >> 8,
Math.min(255, src[3] + dst[3])
};
}
};
case NEGATION:
return new Blender() {
@Override
public int[] blend(int[] src, int[] dst) {
return new int[] {
255 - Math.abs(255 - dst[0] - src[0]),
255 - Math.abs(255 - dst[1] - src[1]),
255 - Math.abs(255 - dst[2] - src[2]),
Math.min(255, src[3] + dst[3])
};
}
};
case OVERLAY:
return new Blender() {
@Override
public int[] blend(int[] src, int[] dst) {
return new int[] {
dst[0] < 128 ? dst[0] * src[0] >> 7 :
255 - ((255 - dst[0]) * (255 - src[0]) >> 7),
dst[1] < 128 ? dst[1] * src[1] >> 7 :
255 - ((255 - dst[1]) * (255 - src[1]) >> 7),
dst[2] < 128 ? dst[2] * src[2] >> 7 :
255 - ((255 - dst[2]) * (255 - src[2]) >> 7),
Math.min(255, src[3] + dst[3])
};
}
};
case RED:
return new Blender() {
@Override
public int[] blend(int[] src, int[] dst) {
return new int[] {
src[0],
dst[1],
dst[2],
Math.min(255, src[3] + dst[3])
};
}
};
case REFLECT:
return new Blender() {
@Override
public int[] blend(int[] src, int[] dst) {
return new int[] {
src[0] == 255 ? 255 : Math.min(255, dst[0] * dst[0] / (255 - src[0])),
src[1] == 255 ? 255 : Math.min(255, dst[1] * dst[1] / (255 - src[1])),
src[2] == 255 ? 255 : Math.min(255, dst[2] * dst[2] / (255 - src[2])),
Math.min(255, src[3] + dst[3])
};
}
};
case SATURATION:
return new Blender() {
@Override
public int[] blend(int[] src, int[] dst) {
float[] srcHSL = new float[3];
RGBtoHSL(src[0], src[1], src[2], srcHSL);
float[] dstHSL = new float[3];
RGBtoHSL(dst[0], dst[1], dst[2], dstHSL);
int[] result = new int[4];
HSLtoRGB(dstHSL[0], srcHSL[1], dstHSL[2], result);
result[3] = Math.min(255, src[3] + dst[3]);
return result;
}
};
case SCREEN:
return new Blender() {
@Override
public int[] blend(int[] src, int[] dst) {
return new int[] {
255 - ((255 - src[0]) * (255 - dst[0]) >> 8),
255 - ((255 - src[1]) * (255 - dst[1]) >> 8),
255 - ((255 - src[2]) * (255 - dst[2]) >> 8),
Math.min(255, src[3] + dst[3])
};
}
};
case SOFT_BURN:
return new Blender() {
@Override
public int[] blend(int[] src, int[] dst) {
return new int[] {
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])),
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])),
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])),
Math.min(255, src[3] + dst[3])
};
}
};
case SOFT_DODGE:
return new Blender() {
@Override
public int[] blend(int[] src, int[] dst) {
return new int[] {
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])),
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])),
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])),
Math.min(255, src[3] + dst[3])
};
}
};
case SOFT_LIGHT:
break;
case STAMP:
return new Blender() {
@Override
public int[] blend(int[] src, int[] dst) {
return new int[] {
Math.max(0, Math.min(255, dst[0] + 2 * src[0] - 256)),
Math.max(0, Math.min(255, dst[1] + 2 * src[1] - 256)),
Math.max(0, Math.min(255, dst[2] + 2 * src[2] - 256)),
Math.min(255, src[3] + dst[3])
};
}
};
case SUBTRACT:
return new Blender() {
@Override
public int[] blend(int[] src, int[] dst) {
return new int[] {
Math.max(0, src[0] + dst[0] - 256),
Math.max(0, src[1] + dst[1] - 256),
Math.max(0, src[2] + dst[2] - 256),
Math.min(255, src[3] + dst[3])
};
}
};
}
throw new IllegalArgumentException("Blender not implement for " +
composite.getMode().name());
}
}
}