/**
*
* 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.filter;import java.awt.Rectangle;
import java.awt.image.BufferedImage;
import java.util.Date;
import java.util.Random;
import lucee.runtime.engine.ThreadLocalPageContext;
import lucee.runtime.exp.FunctionException;
import lucee.runtime.exp.PageException;
import lucee.runtime.img.ImageUtil;
import lucee.runtime.type.KeyImpl;
import lucee.runtime.type.Struct;
import lucee.runtime.type.util.CollectionUtil;
public class QuiltFilter extends WholeImageFilter implements DynFiltering {
private Random randomGenerator;
private long seed = 567;
private int iterations = 25000;
private float a = -0.59f;
private float b = 0.2f;
private float c = 0.1f;
private float d = 0;
private int k = 0;
private Colormap colormap = new LinearColormap();
public QuiltFilter() {
randomGenerator = new Random();
}
public void randomize() {
seed = new Date().getTime();
randomGenerator.setSeed(seed);
a = randomGenerator.nextFloat();
b = randomGenerator.nextFloat();
c = randomGenerator.nextFloat();
d = randomGenerator.nextFloat();
k = randomGenerator.nextInt() % 20 - 10;
}
/**
* Set the number of iterations the effect is performed.
* @param iterations the number of iterations
* @min-value 0
* @see #getIterations
*/
public void setIterations(int iterations) {
this.iterations = iterations;
}
/**
* Get the number of iterations the effect is performed.
* @return the number of iterations
* @see #setIterations
*/
public int getIterations() {
return iterations;
}
public void setA(float a) {
this.a = a;
}
public float getA() {
return a;
}
public void setB(float b) {
this.b = b;
}
public float getB() {
return b;
}
public void setC(float c) {
this.c = c;
}
public float getC() {
return c;
}
public void setD(float d) {
this.d = d;
}
public float getD() {
return d;
}
public void setK(int k) {
this.k = k;
}
public int getK() {
return k;
}
/**
* Set the colormap to be used for the filter.
* @param colormap the colormap
* @see #getColormap
*/
public void setColormap(Colormap colormap) {
this.colormap = colormap;
}
/**
* Get the colormap to be used for the filter.
* @return the colormap
* @see #setColormap
*/
public Colormap getColormap() {
return colormap;
}
@Override
protected int[] filterPixels( int width, int height, int[] inPixels, Rectangle transformedSpace ) {
int[] outPixels = new int[width * height];
//int i = 0;
int max = 0;
float x = 0.1f;
float y = 0.3f;
for (int n = 0; n < 20; n++) {
float mx = ImageMath.PI*x;
float my = ImageMath.PI*y;
float smx2 = (float)Math.sin(2*mx);
float smy2 = (float)Math.sin(2*my);
float x1 = (float)(a*smx2 + b*smx2*Math.cos(2*my) +
c*Math.sin(4*mx) + d*Math.sin(6*mx)*Math.cos(4*my) + k*x);
x1 = x1 >= 0 ? x1 - (int)x1 : x1 - (int)x1 + 1;
float y1 = (float)(a*smy2 + b*smy2*Math.cos(2*mx) +
c*Math.sin(4*my) + d*Math.sin(6*my)*Math.cos(4*mx) + k*y);
y1 = y1 >= 0 ? y1 - (int)y1 : y1 - (int)y1 + 1;
x = x1;
y = y1;
}
for (int n = 0; n < iterations; n++) {
float mx = ImageMath.PI*x;
float my = ImageMath.PI*y;
float x1 = (float)(a*Math.sin(2*mx) + b*Math.sin(2*mx)*Math.cos(2*my) +
c*Math.sin(4*mx) + d*Math.sin(6*mx)*Math.cos(4*my) + k*x);
x1 = x1 >= 0 ? x1 - (int)x1 : x1 - (int)x1 + 1;
float y1 = (float)(a*Math.sin(2*my) + b*Math.sin(2*my)*Math.cos(2*mx) +
c*Math.sin(4*my) + d*Math.sin(6*my)*Math.cos(4*mx) + k*y);
y1 = y1 >= 0 ? y1 - (int)y1 : y1 - (int)y1 + 1;
x = x1;
y = y1;
int ix = (int)(width*x);
int iy = (int)(height*y);
if (ix >= 0 && ix < width && iy >= 0 && iy < height) {
int t = outPixels[width*iy+ix]++;
if (t > max)
max = t;
}
}
if (colormap != null) {
int index = 0;
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++) {
outPixels[index] = colormap.getColor(outPixels[index] / (float)max);
index++;
}
}
}
return outPixels;
}
@Override
public String toString() {
return "Texture/Chaotic Quilt...";
}
@Override
public BufferedImage filter(BufferedImage src, Struct parameters) throws PageException {BufferedImage dst=ImageUtil.createBufferedImage(src);
Object o;
if((o=parameters.removeEL(KeyImpl.init("Iterations")))!=null)setIterations(ImageFilterUtil.toIntValue(o,"Iterations"));
if((o=parameters.removeEL(KeyImpl.init("Colormap")))!=null)setColormap(ImageFilterUtil.toColormap(o,"Colormap"));
if((o=parameters.removeEL(KeyImpl.init("A")))!=null)setA(ImageFilterUtil.toFloatValue(o,"A"));
if((o=parameters.removeEL(KeyImpl.init("B")))!=null)setB(ImageFilterUtil.toFloatValue(o,"B"));
if((o=parameters.removeEL(KeyImpl.init("C")))!=null)setC(ImageFilterUtil.toFloatValue(o,"C"));
if((o=parameters.removeEL(KeyImpl.init("D")))!=null)setD(ImageFilterUtil.toFloatValue(o,"D"));
if((o=parameters.removeEL(KeyImpl.init("K")))!=null)setK(ImageFilterUtil.toIntValue(o,"K"));
// check for arguments not supported
if(parameters.size()>0) {
throw new FunctionException(ThreadLocalPageContext.get(), "ImageFilter", 3, "parameters", "the parameter"+(parameters.size()>1?"s":"")+" ["+CollectionUtil.getKeyList(parameters,", ")+"] "+(parameters.size()>1?"are":"is")+" not allowed, only the following parameters are supported [Iterations, Colormap, A, B, C, D, K]");
}
return filter(src, dst);
}
}