1 /*
2 * $RCSfile: BMPImageReaderSpi.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: 1.3 $
42 * $Date: 2006/03/31 19:43:38 $
43 * $State: Exp $
44 */
45 package com.github.jaiimageio.impl.plugins.bmp;
46
47 import java.io.IOException;
48 import java.util.Locale;
49
50 import javax.imageio.IIOException;
51 import javax.imageio.ImageReader;
52 import javax.imageio.spi.ImageReaderSpi;
53 import javax.imageio.spi.ServiceRegistry;
54 import javax.imageio.stream.ImageInputStream;
55
56 import com.github.jaiimageio.impl.common.ImageUtil;
57 import com.github.jaiimageio.impl.common.PackageUtil;
58
59 public class BMPImageReaderSpi extends ImageReaderSpi {
60
61 private static String [] writerSpiNames =
62 {"com.github.jaiimageio.impl.plugins.bmp.BMPImageWriterSpi"};
63 private static String[] formatNames = {"bmp", "BMP"};
64 private static String[] extensions = {"bmp"};
65 private static String[] mimeTypes = {
66 "image/bmp", "image/x-bmp", "image/x-windows-bmp"
67 };
68 private boolean registered = false;
69
70 public BMPImageReaderSpi() {
71 super(PackageUtil.getVendor(),
72 PackageUtil.getVersion(),
73 formatNames,
74 extensions,
75 mimeTypes,
76 "com.github.jaiimageio.impl.plugins.bmp.BMPImageReader",
77 STANDARD_INPUT_TYPE,
78 writerSpiNames,
79 false,
80 null, null, null, null,
81 true,
82 BMPMetadata.nativeMetadataFormatName,
83 "com.github.jaiimageio.impl.plugins.bmp.BMPMetadataFormat",
84 null, null);
85 }
86
87 public void onRegistration(ServiceRegistry registry,
88 Class category) {
89 if (registered) {
90 return;
91 }
92 registered = true;
93
94 // By JDK 1.7, the BMPImageReader will have been in JDK core for
95 // atleast two FCS releases, so we can set JIIO's to lower priority
96 // With JDK 1.8, we can entirely de-register the JIIO one
97 ImageUtil.processOnRegistration(registry, category, "BMP", this,
98 8, 7); // JDK version 1.8, 1.7
99 }
100
101 public String getDescription(Locale locale) {
102 String desc = PackageUtil.getSpecificationTitle() +
103 " BMP Image Reader";
104 return desc;
105 }
106
107 public boolean canDecodeInput(Object source) throws IOException {
108 if (!(source instanceof ImageInputStream)) {
109 return false;
110 }
111
112 ImageInputStream stream = (ImageInputStream)source;
113 byte[] b = new byte[2];
114 stream.mark();
115 stream.readFully(b);
116 stream.reset();
117
118 return (b[0] == 0x42) && (b[1] == 0x4d);
119 }
120
121 public ImageReader createReaderInstance(Object extension)
122 throws IIOException {
123 return new BMPImageReader(this);
124 }
125 }
126
127