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.List; 025 import railo.runtime.type.Struct; 026 027 028 029 /** 030 * A filter which performs a simple 3x3 sharpening operation. 031 */ 032 public class SharpenFilter extends ConvolveFilter implements DynFiltering { 033 034 private static float[] sharpenMatrix = { 035 0.0f, -0.2f, 0.0f, 036 -0.2f, 1.8f, -0.2f, 037 0.0f, -0.2f, 0.0f 038 }; 039 040 public SharpenFilter() { 041 super(sharpenMatrix); 042 } 043 044 public String toString() { 045 return "Blur/Sharpen"; 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("EdgeAction")))!=null)setEdgeAction(ImageFilterUtil.toString(o,"EdgeAction")); 050 if((o=parameters.removeEL(KeyImpl.init("UseAlpha")))!=null)setUseAlpha(ImageFilterUtil.toBooleanValue(o,"UseAlpha")); 051 if((o=parameters.removeEL(KeyImpl.init("PremultiplyAlpha")))!=null)setPremultiplyAlpha(ImageFilterUtil.toBooleanValue(o,"PremultiplyAlpha")); 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":"")+" ["+List.arrayToList(parameters.keysAsString(),", ")+"] "+(parameters.size()>1?"are":"is")+" not allowed, only the following parameters are supported [Kernel, EdgeAction, UseAlpha, PremultiplyAlpha]"); 056 } 057 058 return filter(src, dst); 059 } 060 }