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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.*;
public class OilFilter extends WholeImageFilter {
static final long serialVersionUID = 1722613531684653826L;
private int range = 3;
private int levels = 256;
public OilFilter() {
}
public void setRange( int range ) {
this.range = range;
}
public int getRange() {
return range;
}
public void setLevels( int levels ) {
this.levels = levels;
}
public int getLevels() {
return levels;
}
protected int[] filterPixels( int width, int height, int[] inPixels, Rectangle transformedSpace ) {
int index = 0;
int[] rHistogram = new int[levels];
int[] gHistogram = new int[levels];
int[] bHistogram = new int[levels];
int[] rTotal = new int[levels];
int[] gTotal = new int[levels];
int[] bTotal = new int[levels];
int[] outPixels = new int[width * height];
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
for (int i = 0; i < levels; i++)
rHistogram[i] = gHistogram[i] = bHistogram[i] = rTotal[i] = gTotal[i] = bTotal[i] = 0;
for (int row = -range; row <= range; row++) {
int iy = y+row;
int ioffset;
if (0 <= iy && iy < height) {
ioffset = iy*width;
for (int col = -range; col <= range; col++) {
int ix = x+col;
if (0 <= ix && ix < width) {
int rgb = inPixels[ioffset+ix];
int r = (rgb >> 16) & 0xff;
int g = (rgb >> 8) & 0xff;
int b = rgb & 0xff;
int ri = r*levels/256;
int gi = g*levels/256;
int bi = b*levels/256;
rTotal[ri] += r;
gTotal[gi] += g;
bTotal[bi] += b;
rHistogram[ri]++;
gHistogram[gi]++;
bHistogram[bi]++;
}
}
}
}
int r = 0, g = 0, b = 0;
for (int i = 1; i < levels; i++) {
if (rHistogram[i] > rHistogram[r])
r = i;
if (gHistogram[i] > gHistogram[g])
g = i;
if (bHistogram[i] > bHistogram[b])
b = i;
}
r = rTotal[r] / rHistogram[r];
g = gTotal[g] / gHistogram[g];
b = bTotal[b] / bHistogram[b];
outPixels[index++] = 0xff000000 | ( r << 16 ) | ( g << 8 ) | b;
}
}
return outPixels;
}
public String toString() {
return "Stylize/Oil...";
}
}
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