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; 036import java.awt.image.WritableRaster; 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 * An abstract superclass for point filters. The interface is the same as the old RGBImageFilter. 048 */ 049public abstract class PointFilter extends AbstractBufferedImageOp implements DynFiltering { 050 051 protected boolean canFilterIndexColorModel = false; 052 053 public BufferedImage filter( BufferedImage src, BufferedImage dst ) { 054 int width = src.getWidth(); 055 int height = src.getHeight(); 056 int type = src.getType(); 057 WritableRaster srcRaster = src.getRaster(); 058 059 if ( dst == null ) 060 dst = createCompatibleDestImage( src, null ); 061 WritableRaster dstRaster = dst.getRaster(); 062 063 setDimensions( width, height); 064 065 int[] inPixels = new int[width]; 066 for ( int y = 0; y < height; y++ ) { 067 // We try to avoid calling getRGB on images as it causes them to become unmanaged, causing horrible performance problems. 068 if ( type == BufferedImage.TYPE_INT_ARGB ) { 069 srcRaster.getDataElements( 0, y, width, 1, inPixels ); 070 for ( int x = 0; x < width; x++ ) 071 inPixels[x] = filterRGB( x, y, inPixels[x] ); 072 dstRaster.setDataElements( 0, y, width, 1, inPixels ); 073 } else { 074 src.getRGB( 0, y, width, 1, inPixels, 0, width ); 075 for ( int x = 0; x < width; x++ ) 076 inPixels[x] = filterRGB( x, y, inPixels[x] ); 077 dst.setRGB( 0, y, width, 1, inPixels, 0, width ); 078 } 079 } 080 081 return dst; 082 } 083 084 public void setDimensions(int width, int height) { 085 } 086 087 public abstract int filterRGB(int x, int y, int rgb); 088 public BufferedImage filter(BufferedImage src, Struct parameters) throws PageException {BufferedImage dst=ImageUtil.createBufferedImage(src); 089 Object o; 090 if((o=parameters.removeEL(KeyImpl.init("Dimensions")))!=null){ 091 int[] dim=ImageFilterUtil.toDimensions(o,"Dimensions"); 092 setDimensions(dim[0],dim[1]); 093 } 094 095 // check for arguments not supported 096 if(parameters.size()>0) { 097 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 [Dimensions]"); 098 } 099 100 return filter(src, dst); 101 } 102}