001/** 002 * 003 * Copyright (c) 2014, the Railo Company Ltd. All rights reserved. 004 * 005 * This library is free software; you can redistribute it and/or 006 * modify it under the terms of the GNU Lesser General Public 007 * License as published by the Free Software Foundation; either 008 * version 2.1 of the License, or (at your option) any later version. 009 * 010 * This library is distributed in the hope that it will be useful, 011 * but WITHOUT ANY WARRANTY; without even the implied warranty of 012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 013 * Lesser General Public License for more details. 014 * 015 * You should have received a copy of the GNU Lesser General Public 016 * License along with this library. If not, see <http://www.gnu.org/licenses/>. 017 * 018 **/ 019/* 020* 021 022Licensed under the Apache License, Version 2.0 (the "License"); 023you may not use this file except in compliance with the License. 024You may obtain a copy of the License at 025 026 http://www.apache.org/licenses/LICENSE-2.0 027 028Unless required by applicable law or agreed to in writing, software 029distributed under the License is distributed on an "AS IS" BASIS, 030WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 031See the License for the specific language governing permissions and 032limitations under the License. 033*/ 034 035package lucee.runtime.img.filter;import java.awt.Rectangle; 036import java.awt.image.BufferedImage; 037 038import lucee.runtime.engine.ThreadLocalPageContext; 039import lucee.runtime.exp.FunctionException; 040import lucee.runtime.exp.PageException; 041import lucee.runtime.img.ImageUtil; 042import lucee.runtime.type.Struct; 043import lucee.runtime.type.util.CollectionUtil; 044 045/** 046 * A filter which replcaes each pixel by the maximum of itself and its eight neightbours. 047 */ 048public class MaximumFilter extends WholeImageFilter implements DynFiltering { 049 050 public MaximumFilter() { 051 } 052 053 protected int[] filterPixels( int width, int height, int[] inPixels, Rectangle transformedSpace ) { 054 int index = 0; 055 int[] outPixels = new int[width * height]; 056 057 for (int y = 0; y < height; y++) { 058 for (int x = 0; x < width; x++) { 059 int pixel = 0xff000000; 060 for (int dy = -1; dy <= 1; dy++) { 061 int iy = y+dy; 062 int ioffset; 063 if (0 <= iy && iy < height) { 064 ioffset = iy*width; 065 for (int dx = -1; dx <= 1; dx++) { 066 int ix = x+dx; 067 if (0 <= ix && ix < width) { 068 pixel = PixelUtils.combinePixels(pixel, inPixels[ioffset+ix], PixelUtils.MAX); 069 } 070 } 071 } 072 } 073 outPixels[index++] = pixel; 074 } 075 } 076 return outPixels; 077 } 078 079 public String toString() { 080 return "Blur/Maximum"; 081 } 082 083 public BufferedImage filter(BufferedImage src, Struct parameters) throws PageException {BufferedImage dst=ImageUtil.createBufferedImage(src); 084 //Object o; 085 086 // check for arguments not supported 087 if(parameters.size()>0) { 088 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 []"); 089 } 090 091 return filter(src, dst); 092 } 093} 094