/**
*
* Copyright (c) 2014, the Railo Company Ltd. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
**/
/*
*
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package lucee.runtime.img.composite;
import java.awt.Color;
import java.awt.CompositeContext;
import java.awt.color.ColorSpace;
import java.awt.image.ColorModel;
import java.awt.image.Raster;
import java.awt.image.WritableRaster;
public class MiscCompositeContext implements CompositeContext {
private int rule;
private float alpha;
private ColorModel srcColorModel;
private ColorModel dstColorModel;
private ColorSpace srcColorSpace;
private ColorSpace dstColorSpace;
private boolean srcNeedsConverting;
private boolean dstNeedsConverting;
public MiscCompositeContext(int rule,
float alpha,
ColorModel srcColorModel,
ColorModel dstColorModel) {
this.rule = rule;
this.alpha = alpha;
this.srcColorModel = srcColorModel;
this.dstColorModel = dstColorModel;
this.srcColorSpace = srcColorModel.getColorSpace();
this.dstColorSpace = dstColorModel.getColorSpace();
//ColorModel srgbCM = ColorModel.getRGBdefault();
// srcNeedsConverting = !srcColorModel.equals(srgbCM);
// dstNeedsConverting = !dstColorModel.equals(srgbCM);
}
@Override
public void dispose() {
}
// Multiply two numbers in the range 0..255 such that 255*255=255
static int multiply255( int a, int b ) {
int t = a * b + 0x80;
return ((t >> 8) + t) >> 8;
}
static int clamp( int a ) {
return a < 0 ? 0 : a > 255 ? 255 : a;
}
@Override
public void compose(Raster src, Raster dstIn, WritableRaster dstOut) {
float a=0, ac=0;
float alpha = this.alpha;
int t;
float[] sHsv = null, diHsv = null, doHsv = null;
switch ( rule ) {
case MiscComposite.HUE:
case MiscComposite.SATURATION:
case MiscComposite.VALUE:
case MiscComposite.COLOR:
sHsv = new float[3];
diHsv = new float[3];
doHsv = new float[3];
break;
}
int[] srcPix = null;
int[] dstPix = null;
int x = dstOut.getMinX();
int w = dstOut.getWidth();
int y0 = dstOut.getMinY();
int y1 = y0 + dstOut.getHeight();
for ( int y = y0; y < y1; y++ ) {
srcPix = src.getPixels(x, y, w, 1, srcPix);
dstPix = dstIn.getPixels(x, y, w, 1, dstPix);
int i = 0;
int end = w*4;
while ( i < end ) {
int sr = srcPix[i];
int dir = dstPix[i];
int sg = srcPix[i+1];
int dig = dstPix[i+1];
int sb = srcPix[i+2];
int dib = dstPix[i+2];
int sa = srcPix[i+3];
int dia = dstPix[i+3];
int dor, dog, dob;
switch ( rule ) {
case MiscComposite.ADD:
default:
dor = dir + sr;
if ( dor > 255 )
dor = 255;
dog = dig + sg;
if ( dog > 255 )
dog = 255;
dob = dib + sb;
if ( dob > 255 )
dob = 255;
break;
case MiscComposite.SUBTRACT:
dor = dir - sr;
if ( dor < 0 )
dor = 0;
dog = dig - sg;
if ( dog < 0 )
dog = 0;
dob = dib - sb;
if ( dob < 0 )
dob = 0;
break;
case MiscComposite.DIFFERENCE:
dor = dir - sr;
if ( dor < 0 )
dor = -dor;
dog = dig - sg;
if ( dog < 0 )
dog = -dog;
dob = dib - sb;
if ( dob < 0 )
dob = -dob;
break;
case MiscComposite.MULTIPLY:
t = dir * sr + 0x80;
dor = ((t >> 8) + t) >> 8;
t = dig * sg + 0x80;
dog = ((t >> 8) + t) >> 8;
t = dib * sb + 0x80;
dob = ((t >> 8) + t) >> 8;
break;
case MiscComposite.SCREEN:
t = (255-dir) * (255-sr) + 0x80;
dor = 255 - ( ((t >> 8) + t) >> 8 );
t = (255-dig) * (255-sg) + 0x80;
dog = 255 - ( ((t >> 8) + t) >> 8 );
t = (255-dib) * (255-sb) + 0x80;
dob = 255 - ( ((t >> 8) + t) >> 8 );
break;
case MiscComposite.OVERLAY:
if ( dir < 128 ) {
t = dir * sr + 0x80;
dor = 2 * (((t >> 8) + t) >> 8);
} else {
t = (255-dir) * (255-sr) + 0x80;
dor = 2 * (255 - ( ((t >> 8) + t) >> 8 ));
}
if ( dig < 128 ) {
t = dig * sg + 0x80;
dog = 2 * (((t >> 8) + t) >> 8);
} else {
t = (255-dig) * (255-sg) + 0x80;
dog = 2 * (255 - ( ((t >> 8) + t) >> 8 ));
}
if ( dib < 128 ) {
t = dib * sb + 0x80;
dob = 2 * (((t >> 8) + t) >> 8);
} else {
t = (255-dib) * (255-sb) + 0x80;
dob = 2 * (255 - ( ((t >> 8) + t) >> 8 ));
}
break;
case MiscComposite.DARKEN:
dor = dir < sr ? dir : sr;
dog = dig < sg ? dig : sg;
dob = dib < sb ? dib : sb;
break;
case MiscComposite.LIGHTEN:
dor = dir > sr ? dir : sr;
dog = dig > sg ? dig : sg;
dob = dib > sb ? dib : sb;
break;
case MiscComposite.AVERAGE:
dor = (dir + sr) / 2;
dog = (dig + sg) / 2;
dob = (dib + sb) / 2;
break;
case MiscComposite.HUE:
case MiscComposite.SATURATION:
case MiscComposite.VALUE:
case MiscComposite.COLOR:
Color.RGBtoHSB(sr, sg, sb, sHsv);
Color.RGBtoHSB(dir, dig, dib, diHsv);
switch(rule) {
case MiscComposite.HUE:
doHsv[0] = sHsv[0];
doHsv[1] = diHsv[1];
doHsv[2] = diHsv[2];
break;
case MiscComposite.SATURATION:
doHsv[0] = diHsv[0];
doHsv[1] = sHsv[1];
doHsv[2] = diHsv[2];
break;
case MiscComposite.VALUE:
doHsv[0] = diHsv[0];
doHsv[1] = diHsv[1];
doHsv[2] = sHsv[2];
break;
case MiscComposite.COLOR:
doHsv[0] = sHsv[0];
doHsv[1] = sHsv[1];
doHsv[2] = diHsv[2];
break;
}
int doRGB = Color.HSBtoRGB(doHsv[0], doHsv[1], doHsv[2]);
dor = (doRGB&0xff0000)>>16;
dog = (doRGB&0xff00)>>8;
dob = (doRGB&0xff);
break;
case MiscComposite.BURN:
if (dir != 255)
dor = clamp(255-(((255-sr) << 8) / (dir+1)));
else
dor = sr;
if (dig != 255)
dog = clamp(255-(((255-sg) << 8) / (dig+1)));
else
dog = sg;
if (dib != 255)
dob = clamp(255-(((255-sb) << 8) / (dib+1)));
else
dob = sb;
break;
case MiscComposite.COLOR_BURN:
if (sr != 0)
dor = Math.max(255 - (((255-dir) << 8) / sr), 0);
else
dor = sr;
if (sg != 0)
dog = Math.max(255 - (((255-dig) << 8) / sg), 0);
else
dog = sg;
if (sb != 0)
dob = Math.max(255 - (((255-dib) << 8) / sb), 0);
else
dob = sb;
break;
case MiscComposite.DODGE:
dor = clamp((sr << 8) / (256-dir));
dog = clamp((sg << 8) / (256-dig));
dob = clamp((sb << 8) / (256-dib));
break;
case MiscComposite.COLOR_DODGE:
if (sr != 255)
dor = Math.min((dir << 8) / (255-sr), 255);
else
dor = sr;
if (sg != 255)
dog = Math.min((dig << 8) / (255-sg), 255);
else
dog = sg;
if (sb != 255)
dob = Math.min((dib << 8) / (255-sb), 255);
else
dob = sb;
break;
case MiscComposite.SOFT_LIGHT:
int d;
d = multiply255(sr, dir);
dor = d + multiply255(dir, 255 - multiply255(255-dir, 255-sr)-d);
d = multiply255(sg, dig);
dog = d + multiply255(dig, 255 - multiply255(255-dig, 255-sg)-d);
d = multiply255(sb, dib);
dob = d + multiply255(dib, 255 - multiply255(255-dib, 255-sb)-d);
break;
case MiscComposite.HARD_LIGHT:
if (sr > 127)
dor = 255 - 2*multiply255(255 - sr, 255 - dir);
else
dor = 2*multiply255(sr, dir);
if (sg > 127)
dog = 255 - 2*multiply255(255 - sg, 255 - dig);
else
dog = 2*multiply255(sg, dig);
if (sb > 127)
dob = 255 - 2*multiply255(255 - sb, 255 - dib);
else
dob = 2*multiply255(sb, dib);
break;
case MiscComposite.PIN_LIGHT:
dor = sr > 127 ? Math.max(sr, dir) : Math.min(sr, dir);
dog = sg > 127 ? Math.max(sg, dig) : Math.min(sg, dig);
dob = sb > 127 ? Math.max(sb, dib) : Math.min(sb, dib);
break;
case MiscComposite.EXCLUSION:
dor = dir+multiply255(sr, (255-dir-dir));
dog = dig+multiply255(sg, (255-dig-dig));
dob = dib+multiply255(sb, (255-dib-dib));
break;
case MiscComposite.NEGATION:
dor = 255 - Math.abs(255-sr-dir);
dog = 255 - Math.abs(255-sg-dig);
dob = 255 - Math.abs(255-sb-dib);
break;
}
a = alpha*sa/255f;
ac = 1-a;
dstPix[i] = (int)(a*dor + ac*dir);
dstPix[i+1] = (int)(a*dog + ac*dig);
dstPix[i+2] = (int)(a*dob + ac*dib);
dstPix[i+3] = (int)(sa*alpha + dia*ac);
i += 4;
}
dstOut.setPixels(x, y, w, 1, dstPix);
}
}
}