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 combines two other BufferedImageOps, one after the other.
029     */
030    public class CompoundFilter extends AbstractBufferedImageOp  implements DynFiltering {
031            private BufferedImageOp filter1;
032            private BufferedImageOp filter2;
033            
034            /**
035         * Construct a CompoundFilter.
036         * @param filter1 the first filter
037         * @param filter2 the second filter
038         */
039        public CompoundFilter( BufferedImageOp filter1, BufferedImageOp filter2 ) {
040                    this.filter1 = filter1;
041                    this.filter2 = filter2;
042            }
043            
044            public BufferedImage filter( BufferedImage src, BufferedImage dst ) {
045                    BufferedImage image = filter1.filter( src, dst );
046                    image = filter2.filter( image, dst );
047                    return image;
048            }
049            public BufferedImage filter(BufferedImage src, Struct parameters) throws PageException {BufferedImage dst=ImageUtil.createBufferedImage(src);
050                    //Object o;
051    
052                    // check for arguments not supported
053                    if(parameters.size()>0) {
054                            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 []");
055                    }
056    
057                    return filter(src, dst);
058            }
059    }