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.awt.image.ColorModel;
038
039import lucee.runtime.engine.ThreadLocalPageContext;
040import lucee.runtime.exp.FunctionException;
041import lucee.runtime.exp.PageException;
042import lucee.runtime.img.ImageUtil;
043import lucee.runtime.type.Struct;
044import lucee.runtime.type.util.CollectionUtil;
045
046
047/**
048 * A filter which acts as a superclass for filters which need to have the whole image in memory
049 * to do their stuff.
050 */
051public abstract class WholeImageFilter extends AbstractBufferedImageOp  implements DynFiltering {
052
053        /**
054     * The output image bounds.
055     */
056    protected Rectangle transformedSpace;
057
058        /**
059     * The input image bounds.
060     */
061        protected Rectangle originalSpace;
062        
063        /**
064         * Construct a WholeImageFilter.
065         */
066        public WholeImageFilter() {
067        }
068
069    public BufferedImage filter( BufferedImage src, BufferedImage dst ) {
070        int width = src.getWidth();
071        int height = src.getHeight();
072                //int type = src.getType();
073                //WritableRaster srcRaster = 
074                src.getRaster();
075
076                originalSpace = new Rectangle(0, 0, width, height);
077                transformedSpace = new Rectangle(0, 0, width, height);
078                transformSpace(transformedSpace);
079
080        if ( dst == null ) {
081            ColorModel dstCM = src.getColorModel();
082                        dst = new BufferedImage(dstCM, dstCM.createCompatibleWritableRaster(transformedSpace.width, transformedSpace.height), dstCM.isAlphaPremultiplied(), null);
083                }
084                //WritableRaster dstRaster = 
085        dst.getRaster();
086
087                int[] inPixels = getRGB( src, 0, 0, width, height, null );
088                inPixels = filterPixels( width, height, inPixels, transformedSpace );
089                setRGB( dst, 0, 0, transformedSpace.width, transformedSpace.height, inPixels );
090
091        return dst;
092    }
093
094        /**
095     * Calculate output bounds for given input bounds.
096     * @param rect input and output rectangle
097     */
098        protected void transformSpace(Rectangle rect) {
099        }
100        
101        /**
102     * Actually filter the pixels.
103     * @param width the image width
104     * @param height the image height
105     * @param inPixels the image pixels
106     * @param transformedSpace the output bounds
107     * @return the output pixels
108     */
109        protected abstract int[] filterPixels( int width, int height, int[] inPixels, Rectangle transformedSpace );
110        public BufferedImage filter(BufferedImage src, Struct parameters) throws PageException {BufferedImage dst=ImageUtil.createBufferedImage(src);
111                //Object o;
112
113                // check for arguments not supported
114                if(parameters.size()>0) {
115                        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 []");
116                }
117
118                return filter(src, dst);
119        }
120}
121