1 /*
   2  * Copyright (c) 2003, 2004, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.imageio.plugins.bmp;
  27 
  28 import java.util.Locale;
  29 import javax.imageio.spi.ImageReaderSpi;
  30 import javax.imageio.stream.ImageInputStream;
  31 import javax.imageio.spi.IIORegistry;
  32 import javax.imageio.spi.ServiceRegistry;
  33 import java.io.IOException;
  34 import javax.imageio.ImageReader;
  35 import javax.imageio.IIOException;
  36 
  37 public class BMPImageReaderSpi extends ImageReaderSpi {
  38 
  39     private static String [] writerSpiNames =
  40         {"com.sun.imageio.plugins.bmp.BMPImageWriterSpi"};
  41     private static String[] formatNames = {"bmp", "BMP"};
  42     private static String[] entensions = {"bmp"};
  43     private static String[] mimeType = {"image/bmp"};
  44 
  45     private boolean registered = false;
  46 
  47     public BMPImageReaderSpi() {
  48         super("Oracle Corporation",
  49               "1.0",
  50               formatNames,
  51               entensions,
  52               mimeType,
  53               "com.sun.imageio.plugins.bmp.BMPImageReader",
  54               new Class[] { ImageInputStream.class },
  55               writerSpiNames,
  56               false,
  57               null, null, null, null,
  58               true,
  59               BMPMetadata.nativeMetadataFormatName,
  60               "com.sun.imageio.plugins.bmp.BMPMetadataFormat",
  61               null, null);
  62     }
  63 
  64     public void onRegistration(ServiceRegistry registry,
  65                                Class<?> category) {
  66         if (registered) {
  67             return;
  68         }
  69         registered = true;
  70     }
  71 
  72     public String getDescription(Locale locale) {
  73         return "Standard BMP Image Reader";
  74     }
  75 
  76     public boolean canDecodeInput(Object source) throws IOException {
  77         if (!(source instanceof ImageInputStream)) {
  78             return false;
  79         }
  80 
  81         ImageInputStream stream = (ImageInputStream)source;
  82         byte[] b = new byte[2];
  83         stream.mark();
  84         stream.readFully(b);
  85         stream.reset();
  86 
  87         return (b[0] == 0x42) && (b[1] == 0x4d);
  88     }
  89 
  90     public ImageReader createReaderInstance(Object extension)
  91         throws IIOException {
  92         return new BMPImageReader(this);
  93     }
  94 }