gnu.javax.imageio.bmp

Class BMPDecoder

Known Direct Subclasses:
DecodeBF16, DecodeBF32, DecodeRGB1, DecodeRGB24, DecodeRGB4, DecodeRGB8, DecodeRLE4, DecodeRLE8

public abstract class BMPDecoder
extends Object

Field Summary

protected BMPFileHeader
fileHeader
protected BMPInfoHeader
infoHeader
protected long
offset

Constructor Summary

BMPDecoder(BMPFileHeader fh, BMPInfoHeader ih)

Method Summary

abstract BufferedImage
decode(ImageInputStream in)
The image decoder.
static BMPDecoder
getDecoder(BMPFileHeader fh, BMPInfoHeader ih)
Determines the coding type of the bitmap and returns the corresponding decoder.
protected int[]
readBitMasks(ImageInputStream in)
Reads r,g,b bit masks from an inputstream
protected IndexColorModel
readPalette(ImageInputStream in)
Reads an N-color palette from an inputstream in RGBQUAD format and returns an equivalent ColorModel object
protected void
skipToImage(ImageInputStream in)
Read bytes to the start of the image data

Methods inherited from class java.lang.Object

clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

fileHeader

protected BMPFileHeader fileHeader

infoHeader

protected BMPInfoHeader infoHeader

offset

protected long offset

Constructor Details

BMPDecoder

public BMPDecoder(BMPFileHeader fh,
                  BMPInfoHeader ih)

Method Details

decode

public abstract BufferedImage decode(ImageInputStream in)
            throws IOException,
                   BMPException
The image decoder.

getDecoder

public static BMPDecoder getDecoder(BMPFileHeader fh,
                                    BMPInfoHeader ih)
Determines the coding type of the bitmap and returns the corresponding decoder.

readBitMasks

protected int[] readBitMasks(ImageInputStream in)
            throws IOException
Reads r,g,b bit masks from an inputstream

readPalette

protected IndexColorModel readPalette(ImageInputStream in)
            throws IOException
Reads an N-color palette from an inputstream in RGBQUAD format and returns an equivalent ColorModel object

skipToImage

protected void skipToImage(ImageInputStream in)
            throws IOException
Read bytes to the start of the image data

BMPDecoder.java -- Copyright (C) 2005 Free Software Foundation, Inc. This file is part of GNU Classpath. GNU Classpath is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU Classpath is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Classpath; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version.