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/*
Copyright 2006 Jerry Huxtable
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 com.jhlabs.image;
import java.awt.*;
import java.awt.image.*;
import java.util.*;
/**
* A filter which can be used to produce wipes by transferring the luma of a Destination image into the alpha channel of the source.
*/
public class KeyFilter extends AbstractBufferedImageOp {
private float hTolerance = 0;
private float sTolerance = 0;
private float bTolerance = 0;
private BufferedImage destination;
private BufferedImage cleanImage;
public KeyFilter() {
}
/**
* Set the tolerance of the image in the range 0..1.
* *arg tolerance The tolerance
*/
public void setHTolerance( float hTolerance ) {
this.hTolerance = hTolerance;
}
public float getHTolerance() {
return hTolerance;
}
public void setSTolerance( float sTolerance ) {
this.sTolerance = sTolerance;
}
public float getSTolerance() {
return sTolerance;
}
public void setBTolerance( float bTolerance ) {
this.bTolerance = bTolerance;
}
public float getBTolerance() {
return bTolerance;
}
public void setDestination( BufferedImage destination ) {
this.destination = destination;
}
public BufferedImage getDestination() {
return destination;
}
public void setCleanImage( BufferedImage cleanImage ) {
this.cleanImage = cleanImage;
}
public BufferedImage getCleanImage() {
return cleanImage;
}
public BufferedImage filter( BufferedImage src, BufferedImage dst ) {
int width = src.getWidth();
int height = src.getHeight();
int type = src.getType();
WritableRaster srcRaster = src.getRaster();
if ( dst == null )
dst = createCompatibleDestImage( src, null );
WritableRaster dstRaster = dst.getRaster();
if ( destination != null && cleanImage != null ) {
float[] hsb1 = null;
float[] hsb2 = null;
int[] inPixels = null;
int[] outPixels = null;
int[] cleanPixels = null;
for ( int y = 0; y < height; y++ ) {
inPixels = getRGB( src, 0, y, width, 1, inPixels );
outPixels = getRGB( destination, 0, y, width, 1, outPixels );
cleanPixels = getRGB( cleanImage, 0, y, width, 1, cleanPixels );
for ( int x = 0; x < width; x++ ) {
int rgb1 = inPixels[x];
int out = outPixels[x];
int rgb2 = cleanPixels[x];
int r1 = (rgb1 >> 16) & 0xff;
int g1 = (rgb1 >> 8) & 0xff;
int b1 = rgb1 & 0xff;
int r2 = (rgb2 >> 16) & 0xff;
int g2 = (rgb2 >> 8) & 0xff;
int b2 = rgb2 & 0xff;
hsb1 = Color.RGBtoHSB( r1, b1, g1, hsb1 );
hsb2 = Color.RGBtoHSB( r2, b2, g2, hsb2 );
// int tolerance = (int)(255*tolerance);
// return Math.abs(r1-r2) <= tolerance && Math.abs(g1-g2) <= tolerance && Math.abs(b1-b2) <= tolerance;
// if ( PixelUtils.nearColors( in, clean, (int)(255*tolerance) ) )
if ( Math.abs( hsb1[0] - hsb2[0] ) < hTolerance && Math.abs( hsb1[1] - hsb2[1] ) < sTolerance && Math.abs( hsb1[2] - hsb2[2] ) < bTolerance )
inPixels[x] = out;
else
inPixels[x] = rgb1;
}
setRGB( dst, 0, y, width, 1, inPixels );
}
}
return dst;
}
public String toString() {
return "Keying/Key...";
}
}
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