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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.geom.*;
import java.awt.image.*;
import com.jhlabs.composite.*;
public class RaysFilter extends MotionBlurOp {
private float opacity = 1.0f;
private float threshold = 0.0f;
private float strength = 0.5f;
private boolean raysOnly = false;
private Colormap colormap;
public RaysFilter() {
}
public void setOpacity(float opacity) {
this.opacity = opacity;
}
public float getOpacity() {
return opacity;
}
public void setThreshold( float threshold ) {
this.threshold = threshold;
}
public float getThreshold() {
return threshold;
}
public void setStrength( float strength ) {
this.strength = strength;
}
public float getStrength() {
return strength;
}
public void setRaysOnly(boolean raysOnly) {
this.raysOnly = raysOnly;
}
public boolean getRaysOnly() {
return raysOnly;
}
public void setColormap(Colormap colormap) {
this.colormap = colormap;
}
public Colormap getColormap() {
return colormap;
}
public BufferedImage filter( BufferedImage src, BufferedImage dst ) {
int width = src.getWidth();
int height = src.getHeight();
int[] pixels = new int[width];
int[] srcPixels = new int[width];
BufferedImage rays = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
int threshold3 = (int)(threshold*3*255);
for ( int y = 0; y < height; y++ ) {
getRGB( src, 0, y, width, 1, pixels );
for ( int x = 0; x < width; x++ ) {
int rgb = pixels[x];
int a = rgb & 0xff000000;
int r = (rgb >> 16) & 0xff;
int g = (rgb >> 8) & 0xff;
int b = rgb & 0xff;
int l = r + g + b;
if (l < threshold3)
pixels[x] = 0xff000000;
else {
l /= 3;
pixels[x] = a | (l << 16) | (l << 8) | l;
}
}
setRGB( rays, 0, y, width, 1, pixels );
}
rays = super.filter( rays, null );
for ( int y = 0; y < height; y++ ) {
getRGB( rays, 0, y, width, 1, pixels );
getRGB( src, 0, y, width, 1, srcPixels );
for ( int x = 0; x < width; x++ ) {
int rgb = pixels[x];
int a = rgb & 0xff000000;
int r = (rgb >> 16) & 0xff;
int g = (rgb >> 8) & 0xff;
int b = rgb & 0xff;
if ( colormap != null ) {
int l = r + g + b;
rgb = colormap.getColor( l * strength * (1/3f) );
} else {
r = PixelUtils.clamp((int)(r * strength));
g = PixelUtils.clamp((int)(g * strength));
b = PixelUtils.clamp((int)(b * strength));
rgb = a | (r << 16) | (g << 8) | b;
}
pixels[x] = rgb;
}
setRGB( rays, 0, y, width, 1, pixels );
}
if ( dst == null )
dst = createCompatibleDestImage( src, null );
Graphics2D g = dst.createGraphics();
if ( !raysOnly ) {
g.setComposite( AlphaComposite.SrcOver );
g.drawRenderedImage( src, null );
}
g.setComposite( MiscComposite.getInstance( MiscComposite.ADD, opacity ) );
g.drawRenderedImage( rays, null );
g.dispose();
return dst;
}
public String toString() {
return "Stylize/Rays...";
}
}
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