1 /*
2 * $RCSfile: TIFFImageReaderSpi.java,v $
3 *
4 *
5 * Copyright (c) 2005 Sun Microsystems, Inc. All Rights Reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * - Redistribution of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 *
14 * - Redistribution in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
17 * distribution.
18 *
19 * Neither the name of Sun Microsystems, Inc. or the names of
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * This software is provided "AS IS," without a warranty of any
24 * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
25 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
26 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
27 * EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL
28 * NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF
29 * USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
30 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR
31 * ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
32 * CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
33 * REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
34 * INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGES.
36 *
37 * You acknowledge that this software is not designed or intended for
38 * use in the design, construction, operation or maintenance of any
39 * nuclear facility.
40 *
41 * $Revision: 1.2 $
42 * $Date: 2006/03/31 19:43:41 $
43 * $State: Exp $
44 */
45 package com.github.jaiimageio.impl.plugins.tiff;
46
47 import java.io.IOException;
48 import java.util.Locale;
49
50 import javax.imageio.ImageReader;
51 import javax.imageio.spi.ImageReaderSpi;
52 import javax.imageio.spi.ServiceRegistry;
53 import javax.imageio.stream.ImageInputStream;
54
55 import com.github.jaiimageio.impl.common.PackageUtil;
56
57 public class TIFFImageReaderSpi extends ImageReaderSpi {
58
59 private static final String[] names = { "tif", "TIF", "tiff", "TIFF" };
60
61 private static final String[] suffixes = { "tif", "tiff" };
62
63 private static final String[] MIMETypes = { "image/tiff" };
64
65 private static final String readerClassName =
66 "com.github.jaiimageio.impl.plugins.tiff.TIFFImageReader";
67
68 private static final String[] writerSpiNames = {
69 "com.github.jaiimageio.impl.plugins.tiff.TIFFImageWriterSpi"
70 };
71
72 private boolean registered = false;
73
74 public TIFFImageReaderSpi() {
75 super(PackageUtil.getVendor(),
76 PackageUtil.getVersion(),
77 names,
78 suffixes,
79 MIMETypes,
80 readerClassName,
81 STANDARD_INPUT_TYPE,
82 writerSpiNames,
83 false,
84 TIFFStreamMetadata.nativeMetadataFormatName,
85 "com.github.jaiimageio.impl.plugins.tiff.TIFFStreamMetadataFormat",
86 null, null,
87 true,
88 TIFFImageMetadata.nativeMetadataFormatName,
89 "com.github.jaiimageio.impl.plugins.tiff.TIFFImageMetadataFormat",
90 null, null
91 );
92 }
93
94 public String getDescription(Locale locale) {
95 String desc = PackageUtil.getSpecificationTitle() +
96 " TIFF Image Reader";
97 return desc;
98 }
99
100 public boolean canDecodeInput(Object input) throws IOException {
101 if (!(input instanceof ImageInputStream)) {
102 return false;
103 }
104
105 ImageInputStream stream = (ImageInputStream)input;
106 byte[] b = new byte[4];
107 stream.mark();
108 stream.readFully(b);
109 stream.reset();
110
111 return ((b[0] == (byte)0x49 && b[1] == (byte)0x49 &&
112 b[2] == (byte)0x2a && b[3] == (byte)0x00) ||
113 (b[0] == (byte)0x4d && b[1] == (byte)0x4d &&
114 b[2] == (byte)0x00 && b[3] == (byte)0x2a));
115 }
116
117 public ImageReader createReaderInstance(Object extension) {
118 return new TIFFImageReader(this);
119 }
120
121 public void onRegistration(ServiceRegistry registry,
122 Class category) {
123 if (registered) {
124 return;
125 }
126
127 registered = true;
128 }
129 }
130