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.image.BufferedImage;
036import java.awt.image.BufferedImageOp;
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.Struct;
043import lucee.runtime.type.util.CollectionUtil;
044
045/**
046 * A BufferedImageOp which iterates another BufferedImageOp.
047 */
048public class IteratedFilter extends AbstractBufferedImageOp  implements DynFiltering {
049        private BufferedImageOp filter;
050        private int iterations;
051        
052    /**
053     * Construct an IteratedFilter.
054     * @param filter the filetr to iterate
055     * @param iterations the number of iterations
056     */
057        public IteratedFilter( BufferedImageOp filter, int iterations ) {
058                this.filter = filter;
059                this.iterations = iterations;
060        }
061        
062        public BufferedImage filter( BufferedImage src, BufferedImage dst ) {
063                BufferedImage image = src;
064
065                for ( int i = 0; i < iterations; i++ )
066                        image = filter.filter( image, dst );
067                
068                return image;
069        }
070        public BufferedImage filter(BufferedImage src, Struct parameters) throws PageException {BufferedImage dst=ImageUtil.createBufferedImage(src);
071                //Object o;
072
073                // check for arguments not supported
074                if(parameters.size()>0) {
075                        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 []");
076                }
077
078                return filter(src, dst);
079        }
080}