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 import java.awt.image.BufferedImageOp; 019 020 import railo.runtime.engine.ThreadLocalPageContext; 021 import railo.runtime.exp.FunctionException; 022 import railo.runtime.exp.PageException; 023 import railo.runtime.img.ImageUtil; 024 import railo.runtime.type.Struct; 025 import railo.runtime.type.util.CollectionUtil; 026 027 /** 028 * A BufferedImageOp which iterates another BufferedImageOp. 029 */ 030 public class IteratedFilter extends AbstractBufferedImageOp implements DynFiltering { 031 private BufferedImageOp filter; 032 private int iterations; 033 034 /** 035 * Construct an IteratedFilter. 036 * @param filter the filetr to iterate 037 * @param iterations the number of iterations 038 */ 039 public IteratedFilter( BufferedImageOp filter, int iterations ) { 040 this.filter = filter; 041 this.iterations = iterations; 042 } 043 044 public BufferedImage filter( BufferedImage src, BufferedImage dst ) { 045 BufferedImage image = src; 046 047 for ( int i = 0; i < iterations; i++ ) 048 image = filter.filter( image, dst ); 049 050 return image; 051 } 052 public BufferedImage filter(BufferedImage src, Struct parameters) throws PageException {BufferedImage dst=ImageUtil.createBufferedImage(src); 053 //Object o; 054 055 // check for arguments not supported 056 if(parameters.size()>0) { 057 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 []"); 058 } 059 060 return filter(src, dst); 061 } 062 }