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}