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.image.BufferedImage; 036 037import lucee.runtime.engine.ThreadLocalPageContext; 038import lucee.runtime.exp.FunctionException; 039import lucee.runtime.exp.PageException; 040import lucee.runtime.type.KeyImpl; 041import lucee.runtime.type.Struct; 042import lucee.runtime.type.util.CollectionUtil; 043/** 044 * A Filter to pixellate images. 045 */ 046public class BlockFilter extends TransformFilter implements DynFiltering { 047 048 private int blockSize = 2; 049 050 /** 051 * Set the pixel block size. 052 * @param blockSize the number of pixels along each block edge 053 * @min-value 1 054 * @max-value 100+ 055 * @see #getBlockSize 056 */ 057 public void setBlockSize(int blockSize) { 058 this.blockSize = blockSize; 059 } 060 061 /** 062 * Get the pixel block size. 063 * @return the number of pixels along each block edge 064 * @see #setBlockSize 065 */ 066 public int getBlockSize() { 067 return blockSize; 068 } 069 070 071 public BlockFilter() { 072 } 073 074 protected void transformInverse(int x, int y, float[] out) { 075 out[0] = (x / blockSize) * blockSize; 076 out[1] = (y / blockSize) * blockSize; 077 } 078 079 public String toString() { 080 return "Stylize/Mosaic..."; 081 } 082 public BufferedImage filter(BufferedImage src, Struct parameters) throws PageException {BufferedImage dst=null;//ImageUtil.createBufferedImage(src); 083 Object o; 084 if((o=parameters.removeEL(KeyImpl.init("BlockSize")))!=null)setBlockSize(ImageFilterUtil.toIntValue(o,"BlockSize")); 085 if((o=parameters.removeEL(KeyImpl.init("EdgeAction")))!=null)setEdgeAction(ImageFilterUtil.toString(o,"EdgeAction")); 086 if((o=parameters.removeEL(KeyImpl.init("Interpolation")))!=null)setInterpolation(ImageFilterUtil.toString(o,"Interpolation")); 087 088 // check for arguments not supported 089 if(parameters.size()>0) { 090 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 [BlockSize, EdgeAction, Interpolation]"); 091 } 092 093 return filter(src, dst); 094 } 095} 096