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.Graphics2D; 036import java.awt.RenderingHints; 037import java.awt.image.BufferedImage; 038import java.awt.image.ColorModel; 039 040import lucee.runtime.engine.ThreadLocalPageContext; 041import lucee.runtime.exp.FunctionException; 042import lucee.runtime.exp.PageException; 043import lucee.runtime.img.ImageUtil; 044import lucee.runtime.type.Struct; 045import lucee.runtime.type.util.CollectionUtil; 046 047/** 048 * Scales an image using bi-cubic interpolation, which can't be done with AffineTransformOp. 049 */ 050public class BicubicScaleFilter extends AbstractBufferedImageOp implements DynFiltering { 051 052 private int width; 053 private int height; 054 055 /** 056 * Construct a BicubicScaleFilter which resizes to 32x32 pixels. 057 */ 058 public BicubicScaleFilter() { 059 this(32, 32); 060 } 061 062 /** 063 * Constructor for a filter which scales the input image to the given width and height using bicubic interpolation. 064 * Unfortunately, it appears that bicubic actually looks worse than bilinear interpolation on most Java implementations, 065 * but you can be the judge. 066 * @param width the width of the output image 067 * @param height the height of the output image 068 */ 069 public BicubicScaleFilter( int width, int height ) { 070 this.width = width; 071 this.height = height; 072 } 073 074 public BufferedImage filter( BufferedImage src, BufferedImage dst ) { 075 //int w = src.getWidth(); 076 //int h = src.getHeight(); 077 078 if ( dst == null ) { 079 ColorModel dstCM = src.getColorModel(); 080 dst = new BufferedImage(dstCM, dstCM.createCompatibleWritableRaster(width, height), dstCM.isAlphaPremultiplied(), null); 081 } 082 083 Graphics2D g = dst.createGraphics(); 084 g.setRenderingHint( RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC ); 085 g.drawImage( src, 0, 0, width, height, null ); 086 g.dispose(); 087 088 return dst; 089 } 090 091 public String toString() { 092 return "Distort/Bicubic Scale"; 093 } 094 095 public BufferedImage filter(BufferedImage src, Struct parameters) throws PageException {BufferedImage dst=ImageUtil.createBufferedImage(src); 096 //Object o; 097 098 // check for arguments not supported 099 if(parameters.size()>0) { 100 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 []"); 101 } 102 103 return filter(src, dst); 104 } 105}