001/*
002Copyright 2006 Jerry Huxtable
003
004Licensed under the Apache License, Version 2.0 (the "License");
005you may not use this file except in compliance with the License.
006You may obtain a copy of the License at
007
008   http://www.apache.org/licenses/LICENSE-2.0
009
010Unless required by applicable law or agreed to in writing, software
011distributed under the License is distributed on an "AS IS" BASIS,
012WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013See the License for the specific language governing permissions and
014limitations under the License.
015*/
016
017package com.jhlabs.image;
018
019import java.awt.*;
020import java.awt.image.*;
021import com.jhlabs.math.*;
022
023public class MapFilter extends TransformFilter {
024
025        private Function2D xMapFunction;
026        private Function2D yMapFunction;
027
028        public MapFilter() {
029        }
030        
031        public void setXMapFunction(Function2D xMapFunction) {
032                this.xMapFunction = xMapFunction;
033        }
034
035        public Function2D getXMapFunction() {
036                return xMapFunction;
037        }
038
039        public void setYMapFunction(Function2D yMapFunction) {
040                this.yMapFunction = yMapFunction;
041        }
042
043        public Function2D getYMapFunction() {
044                return yMapFunction;
045        }
046        
047        protected void transformInverse(int x, int y, float[] out) {
048                float xMap, yMap;
049                xMap = xMapFunction.evaluate(x, y);
050                yMap = yMapFunction.evaluate(x, y);
051                out[0] = xMap * transformedSpace.width;
052                out[1] = yMap * transformedSpace.height;
053        }
054
055        public String toString() {
056                return "Distort/Map Coordinates...";
057        }
058}