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;
037
038import lucee.runtime.engine.ThreadLocalPageContext;
039import lucee.runtime.exp.FunctionException;
040import lucee.runtime.exp.PageException;
041import lucee.runtime.img.ImageUtil;
042import lucee.runtime.type.KeyImpl;
043import lucee.runtime.type.Struct;
044import lucee.runtime.type.util.CollectionUtil;
045
046/**
047 * A filter which produces a "oil-painting" effect.
048 */
049public class OilFilter extends WholeImageFilter  implements DynFiltering {
050        
051        private int range = 3;
052        private int levels = 256;
053        
054        public OilFilter() {
055        }
056
057    /**
058     * Set the range of the effect in pixels.
059     * @param range the range
060     * @see #getRange
061     */
062        public void setRange( int range ) {
063                this.range = range;
064        }
065        
066    /**
067     * Get the range of the effect in pixels.
068     * @return the range
069     * @see #setRange
070     */
071        public int getRange() {
072                return range;
073        }
074        
075    /**
076     * Set the number of levels for the effect.
077     * @param levels the number of levels
078     * @see #getLevels
079     */
080        public void setLevels( int levels ) {
081                this.levels = levels;
082        }
083        
084    /**
085     * Get the number of levels for the effect.
086     * @return the number of levels
087     * @see #setLevels
088     */
089        public int getLevels() {
090                return levels;
091        }
092        
093        protected int[] filterPixels( int width, int height, int[] inPixels, Rectangle transformedSpace ) {
094                int index = 0;
095                int[] rHistogram = new int[levels];
096                int[] gHistogram = new int[levels];
097                int[] bHistogram = new int[levels];
098                int[] rTotal = new int[levels];
099                int[] gTotal = new int[levels];
100                int[] bTotal = new int[levels];
101                int[] outPixels = new int[width * height];
102
103                for (int y = 0; y < height; y++) {
104                        for (int x = 0; x < width; x++) {
105                                for (int i = 0; i < levels; i++)
106                                    rHistogram[i] = gHistogram[i] = bHistogram[i] = rTotal[i] = gTotal[i] = bTotal[i] = 0;
107
108                                for (int row = -range; row <= range; row++) {
109                                        int iy = y+row;
110                                        int ioffset;
111                                        if (0 <= iy && iy < height) {
112                                                ioffset = iy*width;
113                                                for (int col = -range; col <= range; col++) {
114                                                        int ix = x+col;
115                                                        if (0 <= ix && ix < width) {
116                                                                int rgb = inPixels[ioffset+ix];
117                                                                int r = (rgb >> 16) & 0xff;
118                                                                int g = (rgb >> 8) & 0xff;
119                                                                int b = rgb & 0xff;
120                                                                int ri = r*levels/256;
121                                                                int gi = g*levels/256;
122                                                                int bi = b*levels/256;
123                                                                rTotal[ri] += r;
124                                                                gTotal[gi] += g;
125                                                                bTotal[bi] += b;
126                                                                rHistogram[ri]++;
127                                                                gHistogram[gi]++;
128                                                                bHistogram[bi]++;
129                                                        }
130                                                }
131                                        }
132                                }
133                                
134                                int r = 0, g = 0, b = 0;
135                                for (int i = 1; i < levels; i++) {
136                                        if (rHistogram[i] > rHistogram[r])
137                                                r = i;
138                                        if (gHistogram[i] > gHistogram[g])
139                                                g = i;
140                                        if (bHistogram[i] > bHistogram[b])
141                                                b = i;
142                                }
143                                r = rTotal[r] / rHistogram[r];
144                                g = gTotal[g] / gHistogram[g];
145                                b = bTotal[b] / bHistogram[b];
146                                outPixels[index++] = 0xff000000 | ( r << 16 ) | ( g << 8 ) | b;
147                        }
148                }
149                return outPixels;
150        }
151
152        public String toString() {
153                return "Stylize/Oil...";
154        }
155
156        public BufferedImage filter(BufferedImage src, Struct parameters) throws PageException {BufferedImage dst=ImageUtil.createBufferedImage(src);
157                Object o;
158                if((o=parameters.removeEL(KeyImpl.init("Levels")))!=null)setLevels(ImageFilterUtil.toIntValue(o,"Levels"));
159                if((o=parameters.removeEL(KeyImpl.init("Range")))!=null)setRange(ImageFilterUtil.toIntValue(o,"Range"));
160
161                // check for arguments not supported
162                if(parameters.size()>0) {
163                        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 [Levels, Range]");
164                }
165
166                return filter(src, dst);
167        }
168}
169