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 /** 030 * Applies a bit mask to each ARGB pixel of an image. You can use this for, say, masking out the red channel. 031 */ 032 public class MaskFilter extends PointFilter implements DynFiltering { 033 034 private int mask; 035 036 public MaskFilter() { 037 this(0xff00ffff); 038 } 039 040 public MaskFilter(int mask) { 041 canFilterIndexColorModel = true; 042 setMask(mask); 043 } 044 045 public void setMask(int mask) { 046 this.mask = mask; 047 } 048 049 public int getMask() { 050 return mask; 051 } 052 053 public int filterRGB(int x, int y, int rgb) { 054 return rgb & mask; 055 } 056 057 public String toString() { 058 return "Mask"; 059 } 060 061 public BufferedImage filter(BufferedImage src, Struct parameters) throws PageException {BufferedImage dst=ImageUtil.createBufferedImage(src); 062 Object o; 063 if((o=parameters.removeEL(KeyImpl.init("Mask")))!=null)setMask(ImageFilterUtil.toIntValue(o,"Mask")); 064 if((o=parameters.removeEL(KeyImpl.init("Dimensions")))!=null){ 065 int[] dim=ImageFilterUtil.toDimensions(o,"Dimensions"); 066 setDimensions(dim[0],dim[1]); 067 } 068 069 // check for arguments not supported 070 if(parameters.size()>0) { 071 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]"); 072 } 073 074 return filter(src, dst); 075 } 076 }