001 /* 002 * 003 004 Licensed under the Apache License, Version 2.0 (the "License"); 005 you may not use this file except in compliance with the License. 006 You may obtain a copy of the License at 007 008 http://www.apache.org/licenses/LICENSE-2.0 009 010 Unless required by applicable law or agreed to in writing, software 011 distributed under the License is distributed on an "AS IS" BASIS, 012 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 See the License for the specific language governing permissions and 014 limitations under the License. 015 */ 016 017 package railo.runtime.img.filter;import java.awt.image.BufferedImage; 018 019 import railo.runtime.engine.ThreadLocalPageContext; 020 import railo.runtime.exp.FunctionException; 021 import railo.runtime.exp.PageException; 022 import railo.runtime.img.ImageUtil; 023 import railo.runtime.type.KeyImpl; 024 import railo.runtime.type.Struct; 025 import railo.runtime.type.util.CollectionUtil; 026 027 028 /** 029 * A filter which inverts the RGB channels of an image. 030 */ 031 public class InvertFilter extends PointFilter implements DynFiltering { 032 033 public InvertFilter() { 034 canFilterIndexColorModel = true; 035 } 036 037 public int filterRGB(int x, int y, int rgb) { 038 int a = rgb & 0xff000000; 039 return a | (~rgb & 0x00ffffff); 040 } 041 042 public String toString() { 043 return "Colors/Invert"; 044 } 045 046 public BufferedImage filter(BufferedImage src, Struct parameters) throws PageException {BufferedImage dst=ImageUtil.createBufferedImage(src); 047 Object o; 048 if((o=parameters.removeEL(KeyImpl.init("Dimensions")))!=null){ 049 int[] dim=ImageFilterUtil.toDimensions(o,"Dimensions"); 050 setDimensions(dim[0],dim[1]); 051 } 052 053 // check for arguments not supported 054 if(parameters.size()>0) { 055 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]"); 056 } 057 058 return filter(src, dst); 059 } 060 } 061