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 * Applies a bit mask to each ARGB pixel of an image. You can use this for, say, masking out the red channel. 049 */ 050public class MaskFilter extends PointFilter implements DynFiltering { 051 052 private int mask; 053 054 public MaskFilter() { 055 this(0xff00ffff); 056 } 057 058 public MaskFilter(int mask) { 059 canFilterIndexColorModel = true; 060 setMask(mask); 061 } 062 063 public void setMask(int mask) { 064 this.mask = mask; 065 } 066 067 public int getMask() { 068 return mask; 069 } 070 071 public int filterRGB(int x, int y, int rgb) { 072 return rgb & mask; 073 } 074 075 public String toString() { 076 return "Mask"; 077 } 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("Mask")))!=null)setMask(ImageFilterUtil.toIntValue(o,"Mask")); 082 if((o=parameters.removeEL(KeyImpl.init("Dimensions")))!=null){ 083 int[] dim=ImageFilterUtil.toDimensions(o,"Dimensions"); 084 setDimensions(dim[0],dim[1]); 085 } 086 087 // check for arguments not supported 088 if(parameters.size()>0) { 089 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 [Mask, Dimensions]"); 090 } 091 092 return filter(src, dst); 093 } 094}