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.KeyImpl; 043import lucee.runtime.type.Struct; 044import lucee.runtime.type.util.CollectionUtil; 045 046/** 047 * Given a binary image, this filter converts it to its outline, replacing all interior pixels with the 'new' color. 048 */ 049public class OutlineFilter extends BinaryFilter implements DynFiltering { 050 051 public OutlineFilter() { 052 newColor = 0xffffffff; 053 } 054 055 protected int[] filterPixels( int width, int height, int[] inPixels, Rectangle transformedSpace ) { 056 int index = 0; 057 int[] outPixels = new int[width * height]; 058 059 for (int y = 0; y < height; y++) { 060 for (int x = 0; x < width; x++) { 061 int pixel = inPixels[y*width+x]; 062 if (blackFunction.isBlack(pixel)) { 063 int neighbours = 0; 064 065 for (int dy = -1; dy <= 1; dy++) { 066 int iy = y+dy; 067 int ioffset; 068 if (0 <= iy && iy < height) { 069 ioffset = iy*width; 070 for (int dx = -1; dx <= 1; dx++) { 071 int ix = x+dx; 072 if (!(dy == 0 && dx == 0) && 0 <= ix && ix < width) { 073 int rgb = inPixels[ioffset+ix]; 074 if (blackFunction.isBlack(rgb)) 075 neighbours++; 076 } else 077 neighbours++; 078 } 079 } 080 } 081 082 if (neighbours == 9) 083 pixel = newColor; 084 } 085 outPixels[index++] = pixel; 086 } 087 088 } 089 return outPixels; 090 } 091 092 public String toString() { 093 return "Binary/Outline..."; 094 } 095 096 public BufferedImage filter(BufferedImage src, Struct parameters) throws PageException {BufferedImage dst=ImageUtil.createBufferedImage(src); 097 Object o; 098 if((o=parameters.removeEL(KeyImpl.init("Iterations")))!=null)setIterations(ImageFilterUtil.toIntValue(o,"Iterations")); 099 if((o=parameters.removeEL(KeyImpl.init("Colormap")))!=null)setColormap(ImageFilterUtil.toColormap(o,"Colormap")); 100 if((o=parameters.removeEL(KeyImpl.init("NewColor")))!=null)setNewColor(ImageFilterUtil.toColorRGB(o,"NewColor")); 101 102 // check for arguments not supported 103 if(parameters.size()>0) { 104 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 [Iterations, Colormap, NewColor, BlackFunction]"); 105 } 106 107 return filter(src, dst); 108 } 109} 110