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.img.ImageUtil; 041import lucee.runtime.type.KeyImpl; 042import lucee.runtime.type.Struct; 043import lucee.runtime.type.util.CollectionUtil; 044 045public class OffsetFilter extends TransformFilter implements DynFiltering { 046 047 private int width, height; 048 private int xOffset, yOffset; 049 private boolean wrap; 050 051 public OffsetFilter() { 052 this(0, 0, true); 053 } 054 055 public OffsetFilter(int xOffset, int yOffset, boolean wrap) { 056 super(ConvolveFilter.ZERO_EDGES ); 057 this.xOffset = xOffset; 058 this.yOffset = yOffset; 059 this.wrap = wrap; 060 } 061 062 public void setXOffset(int xOffset) { 063 this.xOffset = xOffset; 064 } 065 066 public int getXOffset() { 067 return xOffset; 068 } 069 070 public void setYOffset(int yOffset) { 071 this.yOffset = yOffset; 072 } 073 074 public int getYOffset() { 075 return yOffset; 076 } 077 078 public void setWrap(boolean wrap) { 079 this.wrap = wrap; 080 } 081 082 public boolean getWrap() { 083 return wrap; 084 } 085 086 protected void transformInverse(int x, int y, float[] out) { 087 if ( wrap ) { 088 out[0] = (x+width-xOffset) % width; 089 out[1] = (y+height-yOffset) % height; 090 } else { 091 out[0] = x-xOffset; 092 out[1] = y-yOffset; 093 } 094 } 095 096 public BufferedImage filter( BufferedImage src, BufferedImage dst ) { 097 this.width = src.getWidth(); 098 this.height = src.getHeight(); 099 if ( wrap ) { 100 while (xOffset < 0) 101 xOffset += width; 102 while (yOffset < 0) 103 yOffset += height; 104 xOffset %= width; 105 yOffset %= height; 106 } 107 return super.filter( src, dst ); 108 } 109 110 public String toString() { 111 return "Distort/Offset..."; 112 } 113 public BufferedImage filter(BufferedImage src, Struct parameters) throws PageException {BufferedImage dst=ImageUtil.createBufferedImage(src); 114 Object o; 115 if((o=parameters.removeEL(KeyImpl.init("XOffset")))!=null)setXOffset(ImageFilterUtil.toIntValue(o,"XOffset")); 116 if((o=parameters.removeEL(KeyImpl.init("YOffset")))!=null)setYOffset(ImageFilterUtil.toIntValue(o,"YOffset")); 117 if((o=parameters.removeEL(KeyImpl.init("Wrap")))!=null)setWrap(ImageFilterUtil.toBooleanValue(o,"Wrap")); 118 if((o=parameters.removeEL(KeyImpl.init("EdgeAction")))!=null)setEdgeAction(ImageFilterUtil.toString(o,"EdgeAction")); 119 if((o=parameters.removeEL(KeyImpl.init("Interpolation")))!=null)setInterpolation(ImageFilterUtil.toString(o,"Interpolation")); 120 121 // check for arguments not supported 122 if(parameters.size()>0) { 123 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 [XOffset, YOffset, Wrap, EdgeAction, Interpolation]"); 124 } 125 126 return filter(src, dst); 127 } 128}