001/*
002 * $RCSfile: BMPImageReaderSpi.java,v $
003 *
004 * 
005 * Copyright (c) 2005 Sun Microsystems, Inc. All  Rights Reserved.
006 * 
007 * Redistribution and use in source and binary forms, with or without
008 * modification, are permitted provided that the following conditions
009 * are met: 
010 * 
011 * - Redistribution of source code must retain the above copyright 
012 *   notice, this  list of conditions and the following disclaimer.
013 * 
014 * - Redistribution in binary form must reproduce the above copyright
015 *   notice, this list of conditions and the following disclaimer in 
016 *   the documentation and/or other materials provided with the
017 *   distribution.
018 * 
019 * Neither the name of Sun Microsystems, Inc. or the names of 
020 * contributors may be used to endorse or promote products derived 
021 * from this software without specific prior written permission.
022 * 
023 * This software is provided "AS IS," without a warranty of any 
024 * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND 
025 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, 
026 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
027 * EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL 
028 * NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF 
029 * USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
030 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR 
031 * ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
032 * CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
033 * REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
034 * INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
035 * POSSIBILITY OF SUCH DAMAGES. 
036 * 
037 * You acknowledge that this software is not designed or intended for 
038 * use in the design, construction, operation or maintenance of any 
039 * nuclear facility. 
040 *
041 * $Revision: 1.3 $
042 * $Date: 2006/03/31 19:43:38 $
043 * $State: Exp $
044 */
045package com.github.jaiimageio.impl.plugins.bmp;
046
047import java.util.Locale;
048
049import javax.imageio.spi.ImageReaderSpi;
050import javax.imageio.stream.ImageInputStream;
051import javax.imageio.spi.IIORegistry;
052import javax.imageio.spi.ServiceRegistry;
053
054import java.io.IOException;
055
056import javax.imageio.ImageReader;
057import javax.imageio.IIOException;
058
059import com.github.jaiimageio.impl.common.ImageUtil;
060import com.github.jaiimageio.impl.common.PackageUtil;
061
062public class BMPImageReaderSpi extends ImageReaderSpi {
063
064    private static String [] writerSpiNames =
065        {"com.github.jaiimageio.impl.plugins.bmp.BMPImageWriterSpi"};
066    private static String[] formatNames = {"bmp", "BMP"};
067    private static String[] extensions = {"bmp"};
068    private static String[] mimeTypes = {
069        "image/bmp", "image/x-bmp", "image/x-windows-bmp"
070    };
071    private boolean registered = false;
072
073    public BMPImageReaderSpi() {
074        super(PackageUtil.getVendor(),
075              PackageUtil.getVersion(),
076              formatNames,
077              extensions,
078              mimeTypes,
079              "com.github.jaiimageio.impl.plugins.bmp.BMPImageReader",
080              STANDARD_INPUT_TYPE,
081              writerSpiNames,
082              false,
083              null, null, null, null,
084              true,
085              BMPMetadata.nativeMetadataFormatName,
086              "com.github.jaiimageio.impl.plugins.bmp.BMPMetadataFormat",
087              null, null);
088    }
089
090    public void onRegistration(ServiceRegistry registry,
091                               Class category) {
092        if (registered) {
093            return;
094        }
095        registered = true;
096
097        // By JDK 1.7, the BMPImageReader will have been in JDK core for 
098        // atleast two FCS releases, so we can set JIIO's to lower priority
099        // With JDK 1.8, we can entirely de-register the JIIO one
100        ImageUtil.processOnRegistration(registry, category, "BMP", this,
101                                        8, 7); // JDK version 1.8, 1.7
102    }
103
104    public String getDescription(Locale locale) {
105        String desc = PackageUtil.getSpecificationTitle() + 
106            " BMP Image Reader";  
107        return desc;
108    }
109
110    public boolean canDecodeInput(Object source) throws IOException {
111        if (!(source instanceof ImageInputStream)) {
112            return false;
113        }
114
115        ImageInputStream stream = (ImageInputStream)source;
116        byte[] b = new byte[2];
117        stream.mark();
118        stream.readFully(b);
119        stream.reset();
120
121        return (b[0] == 0x42) && (b[1] == 0x4d);
122    }
123
124    public ImageReader createReaderInstance(Object extension)
125        throws IIOException {
126        return new BMPImageReader(this);
127    }
128}
129