001/* Copyright (C) 2004 Free Software Foundation 002 003This file is part of GNU Classpath. 004 005GNU Classpath is free software; you can redistribute it and/or modify 006it under the terms of the GNU General Public License as published by 007the Free Software Foundation; either version 2, or (at your option) 008any later version. 009 010GNU Classpath is distributed in the hope that it will be useful, but 011WITHOUT ANY WARRANTY; without even the implied warranty of 012MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 013General Public License for more details. 014 015You should have received a copy of the GNU General Public License 016along with GNU Classpath; see the file COPYING. If not, write to the 017Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 01802110-1301 USA. 019 020Linking this library statically or dynamically with other modules is 021making a combined work based on this library. Thus, the terms and 022conditions of the GNU General Public License cover the whole 023combination. 024 025As a special exception, the copyright holders of this library give you 026permission to link this library with independent modules to produce an 027executable, regardless of the license terms of these independent 028modules, and to copy and distribute the resulting executable under 029terms of your choice, provided that you also meet, for each linked 030independent module, the terms and conditions of the license of that 031module. An independent module is a module which is not derived from 032or based on this library. If you modify this library, you may extend 033this exception to your version of the library, but you are not 034obligated to do so. If you do not wish to do so, delete this 035exception statement from your version. */ 036 037package java.awt.image; 038 039import java.awt.Point; 040 041/** 042 * The BufferedImageFilter class wraps BufferedImageOp objects in a Filter. 043 * 044 * When pixels are pushed through the filter, we create a BufferedImage, 045 * apply the BufferedImageOp, and pass the filtered pixels to the base class. 046 * 047 * @author jlquinn@optonline.net 048 */ 049public class BufferedImageFilter extends ImageFilter implements Cloneable 050{ 051 private BufferedImageOp op; 052 053 /** 054 * 055 */ 056 public BufferedImageFilter(BufferedImageOp op) 057 { 058 super(); 059 if (op == null) 060 throw new NullPointerException("BufferedImageFilter null" 061 + " op in constructor"); 062 this.op = op; 063 } 064 065 /** 066 * @return Returns the contained BufferedImageOp. 067 */ 068 public BufferedImageOp getBufferedImageOp() 069 { 070 return op; 071 } 072 073 // FIXME: Definitely not sure this is the right thing. I'm not sure how to 074 // create a compatible sample model that incorporates scansize != w. I 075 // asume off is handled by the db itself. 076 public void setPixels(int x, int y, int w, int h, ColorModel model, 077 byte[] pixels, int off, int scansize) 078 { 079 // Create an input BufferedImage 080 DataBufferByte db = new DataBufferByte(pixels, scansize * h + off, off); 081 SampleModel sm = model.createCompatibleSampleModel(scansize, h); 082 WritableRaster wr = new WritableRaster(sm, db, new Point(0, 0)); 083 BufferedImage in = 084 new BufferedImage(model, wr, model.isAlphaPremultiplied(), null); 085 BufferedImage out = op.createCompatibleDestImage(in, model); 086 op.filter(in, out); 087 DataBuffer dbout = out.getRaster().getDataBuffer(); 088 super.setPixels(0, 0, w, h, model, ((DataBufferByte)dbout).getData(), 0, 089 scansize); 090 } 091 092 // FIXME: Definitely not sure this is the right thing. I'm not sure how 093 // to create a compatible sample model that incorporates 094 // scansize != w. I asume off is handled by the db itself. 095 public void setPixels(int x, int y, int w, int h, ColorModel model, 096 int[] pixels, int off, int scansize) 097 { 098 // Create an input BufferedImage 099 DataBufferInt db = new DataBufferInt(pixels, scansize * h + off, off); 100 SampleModel sm = model.createCompatibleSampleModel(scansize, h); 101 WritableRaster wr = new WritableRaster(sm, db, new Point(0, 0)); 102 BufferedImage in = 103 new BufferedImage(model, wr, model.isAlphaPremultiplied(), null); 104 BufferedImage out = op.createCompatibleDestImage(in, model); 105 op.filter(in, out); 106 DataBuffer dbout = out.getRaster().getDataBuffer(); 107 super.setPixels(0, 0, w, h, model, ((DataBufferInt)dbout).getData(), 0, 108 scansize); 109 } 110}