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     * A filter which produces  the stipple effect for Swing icons specified in the Java Look and Feel Guidelines.
031     */
032    public class JavaLnFFilter extends PointFilter  implements DynFiltering {
033    
034            public JavaLnFFilter() {
035            }
036    
037            public int filterRGB(int x, int y, int rgb) {
038                    if ((x & 1) == (y & 1))
039                            return rgb;
040                    return ImageMath.mixColors(0.25f, 0xff999999, rgb);
041            }
042    
043            public String toString() {
044                    return "Stylize/Java L&F Stipple";
045            }
046    
047            public BufferedImage filter(BufferedImage src, Struct parameters) throws PageException {BufferedImage dst=ImageUtil.createBufferedImage(src);
048                    Object o;
049                    if((o=parameters.removeEL(KeyImpl.init("Dimensions")))!=null){
050                            int[] dim=ImageFilterUtil.toDimensions(o,"Dimensions");
051                            setDimensions(dim[0],dim[1]);
052                    }
053    
054                    // check for arguments not supported
055                    if(parameters.size()>0) {
056                            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]");
057                    }
058    
059                    return filter(src, dst);
060            }
061    }
062    
063