1 /* BMPImageReader.java --
2 Copyright (C) 2005 Free Software Foundation, Inc.
4 This file is part of GNU Classpath.
6 GNU Classpath is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU Classpath is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU Classpath; see the file COPYING. If not, write to the
18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 Linking this library statically or dynamically with other modules is
22 making a combined work based on this library. Thus, the terms and
23 conditions of the GNU General Public License cover the whole
26 As a special exception, the copyright holders of this library give you
27 permission to link this library with independent modules to produce an
28 executable, regardless of the license terms of these independent
29 modules, and to copy and distribute the resulting executable under
30 terms of your choice, provided that you also meet, for each linked
31 independent module, the terms and conditions of the license of that
32 module. An independent module is a module which is not derived from
33 or based on this library. If you modify this library, you may extend
34 this exception to your version of the library, but you are not
35 obligated to do so. If you do not wish to do so, delete this
36 exception statement from your version. */
38 package gnu
.javax
.imageio
.bmp
;
40 import java
.io
.IOException
;
41 import javax
.imageio
.*;
42 import javax
.imageio
.spi
.*;
43 import javax
.imageio
.metadata
.*;
44 import javax
.imageio
.stream
.ImageInputStream
;
45 import java
.util
.Iterator
;
46 import java
.awt
.image
.BufferedImage
;
48 public class BMPImageReader
extends ImageReader
{
49 private BMPInfoHeader infoHeader
;
50 private BMPFileHeader fileHeader
;
51 private BMPDecoder decoder
;
53 protected BMPImageReader(ImageReaderSpi originatingProvider
){
54 super(originatingProvider
);
60 private void validateIndex(int imageIndex
)
61 throws IndexOutOfBoundsException
{
63 throw new IndexOutOfBoundsException("Invalid image index.");
66 public void setInput(Object input
) {
67 super.setInput(input
);
70 public void setInput(Object input
,
71 boolean seekForwardOnly
,
72 boolean ignoreMetadata
) {
73 super.setInput(input
, seekForwardOnly
, ignoreMetadata
);
76 public void setInput(Object input
, boolean isStreamable
) {
77 super.setInput(input
, isStreamable
);
79 if (!(input
instanceof ImageInputStream
))
80 throw new IllegalArgumentException("Input not an ImageInputStream.");
83 private void checkStream() throws IOException
{
84 if (!(input
instanceof ImageInputStream
))
85 throw new IllegalStateException("Input not an ImageInputStream.");
87 throw new IllegalStateException("No input stream.");
91 private void readHeaders() throws IOException
, IIOException
{
92 if(fileHeader
!= null)
97 fileHeader
= new BMPFileHeader((ImageInputStream
)input
);
98 infoHeader
= new BMPInfoHeader((ImageInputStream
)input
);
99 decoder
= BMPDecoder
.getDecoder(fileHeader
, infoHeader
);
102 public int getWidth(int imageIndex
) throws IOException
{
103 validateIndex(imageIndex
);
105 return infoHeader
.getWidth();
108 public int getHeight(int imageIndex
) throws IOException
{
109 validateIndex(imageIndex
);
111 return infoHeader
.getHeight();
114 public Iterator
getImageTypes(int imageIndex
){
115 validateIndex(imageIndex
);
120 * Returns the number of images. BMP files can only contain a single one.
122 public int getNumImages(boolean allowSearch
){
127 // FIXME: Support metadata
128 public IIOMetadata
getImageMetadata(int imageIndex
){
129 validateIndex(imageIndex
);
133 // FIXME: Support metadata
134 public IIOMetadata
getStreamMetadata(){
139 * Reads the image indexed by imageIndex and returns it as
140 * a complete BufferedImage, using a supplied ImageReadParam.
142 public BufferedImage
read(int imageIndex
, ImageReadParam param
)
143 throws IOException
, IIOException
{
144 validateIndex(imageIndex
);
146 return decoder
.decode((ImageInputStream
)input
);