001 /* Copyright (C) 2004 Free Software Foundation
002
003 This file is part of GNU Classpath.
004
005 GNU Classpath is free software; you can redistribute it and/or modify
006 it under the terms of the GNU General Public License as published by
007 the Free Software Foundation; either version 2, or (at your option)
008 any later version.
009
010 GNU Classpath is distributed in the hope that it will be useful, but
011 WITHOUT ANY WARRANTY; without even the implied warranty of
012 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
013 General Public License for more details.
014
015 You should have received a copy of the GNU General Public License
016 along with GNU Classpath; see the file COPYING. If not, write to the
017 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
018 02110-1301 USA.
019
020 Linking this library statically or dynamically with other modules is
021 making a combined work based on this library. Thus, the terms and
022 conditions of the GNU General Public License cover the whole
023 combination.
024
025 As a special exception, the copyright holders of this library give you
026 permission to link this library with independent modules to produce an
027 executable, regardless of the license terms of these independent
028 modules, and to copy and distribute the resulting executable under
029 terms of your choice, provided that you also meet, for each linked
030 independent module, the terms and conditions of the license of that
031 module. An independent module is a module which is not derived from
032 or based on this library. If you modify this library, you may extend
033 this exception to your version of the library, but you are not
034 obligated to do so. If you do not wish to do so, delete this
035 exception statement from your version. */
036
037 package java.awt.image;
038
039 import 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 */
049 public 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 }