1 /*

     2  * Copyright (c) 2005, 2015, 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 package com.sun.imageio.plugins.tiff;

    26 

    27 import java.io.IOException;

    28 import java.util.Locale;

    29 import javax.imageio.ImageReader;

    30 import javax.imageio.spi.ImageReaderSpi;

    31 import javax.imageio.spi.ServiceRegistry;

    32 import javax.imageio.stream.ImageInputStream;

    33 

    34 public class TIFFImageReaderSpi extends ImageReaderSpi {

    35 

    36     private boolean registered = false;

    37 

    38     public TIFFImageReaderSpi() {

    39         super("Oracle Corporation",

    40               "1.0",

    41               new String[] {"tif", "TIF", "tiff", "TIFF"},

    42               new String[] {"tif", "tiff"},

    43               new String[] {"image/tiff"},

    44               "com.sun.imageio.plugins.tiff.TIFFImageReader",

    45               new Class<?>[] { ImageInputStream.class },

    46               new String[] {"com.sun.imageio.plugins.tiff.TIFFImageWriterSpi"},

    47               false,

    48               TIFFStreamMetadata.NATIVE_METADATA_FORMAT_NAME,

    49               "com.sun.imageio.plugins.tiff.TIFFStreamMetadataFormat",

    50               null, null,

    51               true,

    52               TIFFImageMetadata.NATIVE_METADATA_FORMAT_NAME,

    53               "com.sun.imageio.plugins.tiff.TIFFImageMetadataFormat",

    54               null, null

    55               );

    56     }

    57 

    58     public String getDescription(Locale locale) {

    59         return "Standard TIFF image reader";

    60     }

    61 

    62     public boolean canDecodeInput(Object input) throws IOException {

    63         if (!(input instanceof ImageInputStream)) {

    64             return false;

    65         }

    66 

    67         ImageInputStream stream = (ImageInputStream)input;

    68         byte[] b = new byte[4];

    69         stream.mark();

    70         stream.readFully(b);

    71         stream.reset();

    72 

    73         return ((b[0] == (byte)0x49 && b[1] == (byte)0x49 &&

    74                  b[2] == (byte)0x2a && b[3] == (byte)0x00) ||

    75                 (b[0] == (byte)0x4d && b[1] == (byte)0x4d &&

    76                  b[2] == (byte)0x00 && b[3] == (byte)0x2a));

    77     }

    78 

    79     public ImageReader createReaderInstance(Object extension) {

    80         return new TIFFImageReader(this);

    81     }

    82 

    83     public void onRegistration(ServiceRegistry registry,

    84                                Class<?> category) {

    85         if (registered) {

    86             return;

    87         }

    88 

    89         registered = true;

    90     }

    91 }