001/**
002 *
003 * Copyright (c) 2014, the Railo Company Ltd. All rights reserved.
004 *
005 * This library is free software; you can redistribute it and/or
006 * modify it under the terms of the GNU Lesser General Public
007 * License as published by the Free Software Foundation; either 
008 * version 2.1 of the License, or (at your option) any later version.
009 * 
010 * This library is distributed in the hope that it will be useful,
011 * but WITHOUT ANY WARRANTY; without even the implied warranty of
012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
013 * Lesser General Public License for more details.
014 * 
015 * You should have received a copy of the GNU Lesser General Public 
016 * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
017 * 
018 **/
019/*
020*
021
022Licensed under the Apache License, Version 2.0 (the "License");
023you may not use this file except in compliance with the License.
024You may obtain a copy of the License at
025
026   http://www.apache.org/licenses/LICENSE-2.0
027
028Unless required by applicable law or agreed to in writing, software
029distributed under the License is distributed on an "AS IS" BASIS,
030WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
031See the License for the specific language governing permissions and
032limitations under the License.
033*/
034
035package lucee.runtime.img.filter;import java.awt.Rectangle;
036import java.awt.image.BufferedImage;
037import java.util.Date;
038import java.util.Random;
039
040import lucee.runtime.engine.ThreadLocalPageContext;
041import lucee.runtime.exp.FunctionException;
042import lucee.runtime.exp.PageException;
043import lucee.runtime.img.ImageUtil;
044import lucee.runtime.type.KeyImpl;
045import lucee.runtime.type.Struct;
046import lucee.runtime.type.util.CollectionUtil;
047
048public class QuiltFilter extends WholeImageFilter  implements DynFiltering {
049
050        private Random randomGenerator;
051        private long seed = 567;
052        private int iterations = 25000;
053        private float a = -0.59f;
054        private float b = 0.2f;
055        private float c = 0.1f;
056        private float d = 0;
057        private int k = 0;
058        private Colormap colormap = new LinearColormap();
059
060        public QuiltFilter() {
061                randomGenerator = new Random();
062        }
063
064        public void randomize() {
065                seed = new Date().getTime();
066                randomGenerator.setSeed(seed);
067                a = randomGenerator.nextFloat();
068                b = randomGenerator.nextFloat();
069                c = randomGenerator.nextFloat();
070                d = randomGenerator.nextFloat();
071                k = randomGenerator.nextInt() % 20 - 10;
072        }
073        
074        /**
075         * Set the number of iterations the effect is performed.
076         * @param iterations the number of iterations
077     * @min-value 0
078     * @see #getIterations
079         */
080        public void setIterations(int iterations) {
081                this.iterations = iterations;
082        }
083
084        /**
085         * Get the number of iterations the effect is performed.
086         * @return the number of iterations
087     * @see #setIterations
088         */
089        public int getIterations() {
090                return iterations;
091        }
092
093        public void setA(float a) {
094                this.a = a;
095        }
096
097        public float getA() {
098                return a;
099        }
100
101        public void setB(float b) {
102                this.b = b;
103        }
104
105        public float getB() {
106                return b;
107        }
108
109        public void setC(float c) {
110                this.c = c;
111        }
112
113        public float getC() {
114                return c;
115        }
116
117        public void setD(float d) {
118                this.d = d;
119        }
120
121        public float getD() {
122                return d;
123        }
124
125        public void setK(int k) {
126                this.k = k;
127        }
128
129        public int getK() {
130                return k;
131        }
132
133    /**
134     * Set the colormap to be used for the filter.
135     * @param colormap the colormap
136     * @see #getColormap
137     */
138        public void setColormap(Colormap colormap) {
139                this.colormap = colormap;
140        }
141        
142    /**
143     * Get the colormap to be used for the filter.
144     * @return the colormap
145     * @see #setColormap
146     */
147        public Colormap getColormap() {
148                return colormap;
149        }
150        
151        protected int[] filterPixels( int width, int height, int[] inPixels, Rectangle transformedSpace ) {
152                int[] outPixels = new int[width * height];
153
154                //int i = 0;
155                int max = 0;
156
157                float x = 0.1f;
158                float y = 0.3f;
159                
160                for (int n = 0; n < 20; n++) {
161                        float mx = ImageMath.PI*x;
162                        float my = ImageMath.PI*y;
163                        float smx2 = (float)Math.sin(2*mx);
164                        float smy2 = (float)Math.sin(2*my);
165                        float x1 = (float)(a*smx2 + b*smx2*Math.cos(2*my) +
166                                c*Math.sin(4*mx) + d*Math.sin(6*mx)*Math.cos(4*my) + k*x);
167                        x1 = x1 >= 0 ? x1 - (int)x1 : x1 - (int)x1 + 1;
168
169                        float y1 = (float)(a*smy2 + b*smy2*Math.cos(2*mx) +
170                                c*Math.sin(4*my) + d*Math.sin(6*my)*Math.cos(4*mx) + k*y);
171                        y1 = y1 >= 0 ? y1 - (int)y1 : y1 - (int)y1 + 1;
172                        x = x1;
173                        y = y1;
174                }
175
176                for (int n = 0; n < iterations; n++) {
177                        float mx = ImageMath.PI*x;
178                        float my = ImageMath.PI*y;
179                        float x1 = (float)(a*Math.sin(2*mx) + b*Math.sin(2*mx)*Math.cos(2*my) +
180                                c*Math.sin(4*mx) + d*Math.sin(6*mx)*Math.cos(4*my) + k*x);
181                        x1 = x1 >= 0 ? x1 - (int)x1 : x1 - (int)x1 + 1;
182
183                        float y1 = (float)(a*Math.sin(2*my) + b*Math.sin(2*my)*Math.cos(2*mx) +
184                                c*Math.sin(4*my) + d*Math.sin(6*my)*Math.cos(4*mx) + k*y);
185                        y1 = y1 >= 0 ? y1 - (int)y1 : y1 - (int)y1 + 1;
186                        x = x1;
187                        y = y1;
188                        int ix = (int)(width*x);
189                        int iy = (int)(height*y);
190                        if (ix >= 0 && ix < width && iy >= 0 && iy < height) {
191                                int t = outPixels[width*iy+ix]++;
192                                if (t > max)
193                                        max = t;
194                        }
195                }
196
197                if (colormap != null) {
198                        int index = 0;
199                        for (y = 0; y < height; y++) {
200                                for (x = 0; x < width; x++) {
201                                        outPixels[index] = colormap.getColor(outPixels[index] / (float)max);
202                                        index++;
203                                }
204                        }
205                }
206                return outPixels;
207        }
208
209        public String toString() {
210                return "Texture/Chaotic Quilt...";
211        }
212        
213        public BufferedImage filter(BufferedImage src, Struct parameters) throws PageException {BufferedImage dst=ImageUtil.createBufferedImage(src);
214                Object o;
215                if((o=parameters.removeEL(KeyImpl.init("Iterations")))!=null)setIterations(ImageFilterUtil.toIntValue(o,"Iterations"));
216                if((o=parameters.removeEL(KeyImpl.init("Colormap")))!=null)setColormap(ImageFilterUtil.toColormap(o,"Colormap"));
217                if((o=parameters.removeEL(KeyImpl.init("A")))!=null)setA(ImageFilterUtil.toFloatValue(o,"A"));
218                if((o=parameters.removeEL(KeyImpl.init("B")))!=null)setB(ImageFilterUtil.toFloatValue(o,"B"));
219                if((o=parameters.removeEL(KeyImpl.init("C")))!=null)setC(ImageFilterUtil.toFloatValue(o,"C"));
220                if((o=parameters.removeEL(KeyImpl.init("D")))!=null)setD(ImageFilterUtil.toFloatValue(o,"D"));
221                if((o=parameters.removeEL(KeyImpl.init("K")))!=null)setK(ImageFilterUtil.toIntValue(o,"K"));
222
223                // check for arguments not supported
224                if(parameters.size()>0) {
225                        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]");
226                }
227
228                return filter(src, dst);
229        }
230}