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.type.KeyImpl; 042import lucee.runtime.type.Struct; 043import lucee.runtime.type.util.CollectionUtil; 044 045 046 047/** 048 * A filter which replaces one color by another in an image. This is frankly, not often useful, but has its occasional 049 * uses when dealing with GIF transparency and the like. 050 */ 051public class MapColorsFilter extends PointFilter implements DynFiltering { 052 053 private int oldColor; 054 private int newColor; 055 056 /** 057 * Construct a MapColorsFilter. 058 */ 059 public MapColorsFilter() { 060 this( 0xffffffff, 0xff000000 ); 061 } 062 063 /** 064 * Construct a MapColorsFilter. 065 * @param oldColor the color to replace 066 * @param newColor the color to replace it with 067 */ 068 public MapColorsFilter(int oldColor, int newColor) { 069 canFilterIndexColorModel = true; 070 this.oldColor = oldColor; 071 this.newColor = newColor; 072 } 073 074 public int filterRGB(int x, int y, int rgb) { 075 if (rgb == oldColor) 076 return newColor; 077 return rgb; 078 } 079 public BufferedImage filter(BufferedImage src, Struct parameters) throws PageException {BufferedImage dst=ImageUtil.createBufferedImage(src); 080 Object o; 081 if((o=parameters.removeEL(KeyImpl.init("Dimensions")))!=null){ 082 int[] dim=ImageFilterUtil.toDimensions(o,"Dimensions"); 083 setDimensions(dim[0],dim[1]); 084 } 085 086 // check for arguments not supported 087 if(parameters.size()>0) { 088 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 [Dimensions]"); 089 } 090 091 return filter(src, dst); 092 } 093} 094