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;
036
037import lucee.runtime.engine.ThreadLocalPageContext;
038import lucee.runtime.exp.FunctionException;
039import lucee.runtime.exp.PageException;
040import lucee.runtime.img.ImageUtil;
041import lucee.runtime.img.math.Function2D;
042import lucee.runtime.type.KeyImpl;
043import lucee.runtime.type.Struct;
044import lucee.runtime.type.util.CollectionUtil;
045
046public class MapFilter extends TransformFilter  implements DynFiltering {
047
048        private Function2D xMapFunction;
049        private Function2D yMapFunction;
050
051        public MapFilter() {
052        }
053        
054        public void setXMapFunction(Function2D xMapFunction) {
055                this.xMapFunction = xMapFunction;
056        }
057
058        public Function2D getXMapFunction() {
059                return xMapFunction;
060        }
061
062        public void setYMapFunction(Function2D yMapFunction) {
063                this.yMapFunction = yMapFunction;
064        }
065
066        public Function2D getYMapFunction() {
067                return yMapFunction;
068        }
069        
070        protected void transformInverse(int x, int y, float[] out) {
071                float xMap, yMap;
072                xMap = xMapFunction.evaluate(x, y);
073                yMap = yMapFunction.evaluate(x, y);
074                out[0] = xMap * transformedSpace.width;
075                out[1] = yMap * transformedSpace.height;
076        }
077
078        public String toString() {
079                return "Distort/Map Coordinates...";
080        }
081        public BufferedImage filter(BufferedImage src, Struct parameters) throws PageException {BufferedImage dst=ImageUtil.createBufferedImage(src);
082                Object o;
083                if((o=parameters.removeEL(KeyImpl.init("XMapFunction")))!=null)setXMapFunction(ImageFilterUtil.toFunction2D(o,"XMapFunction"));
084                if((o=parameters.removeEL(KeyImpl.init("YMapFunction")))!=null)setYMapFunction(ImageFilterUtil.toFunction2D(o,"YMapFunction"));
085                if((o=parameters.removeEL(KeyImpl.init("EdgeAction")))!=null)setEdgeAction(ImageFilterUtil.toString(o,"EdgeAction"));
086                if((o=parameters.removeEL(KeyImpl.init("Interpolation")))!=null)setInterpolation(ImageFilterUtil.toString(o,"Interpolation"));
087
088                // check for arguments not supported
089                if(parameters.size()>0) {
090                        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 [XMapFunction, YMapFunction, EdgeAction, Interpolation]");
091                }
092
093                return filter(src, dst);
094        }
095}