/*

 * Copyright (c) 2005, 2015, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package com.sun.imageio.plugins.tiff;

import java.io.IOException;

import java.util.Locale;

import javax.imageio.ImageReader;

import javax.imageio.spi.ImageReaderSpi;

import javax.imageio.spi.ServiceRegistry;

import javax.imageio.stream.ImageInputStream;

public class TIFFImageReaderSpi extends ImageReaderSpi {

    private boolean registered = false;

    public TIFFImageReaderSpi() {

        super("Oracle Corporation",

              "1.0",

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

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

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

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

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

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

              false,

              TIFFStreamMetadata.NATIVE_METADATA_FORMAT_NAME,

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

              null, null,

              true,

              TIFFImageMetadata.NATIVE_METADATA_FORMAT_NAME,

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

              null, null

              );

    }

    public String getDescription(Locale locale) {

        return "Standard TIFF image reader";

    }

    public boolean canDecodeInput(Object input) throws IOException {

        if (!(input instanceof ImageInputStream)) {

            return false;

        }

        ImageInputStream stream = (ImageInputStream)input;

        byte[] b = new byte[4];

        stream.mark();

        stream.readFully(b);

        stream.reset();

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

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

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

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

    }

    public ImageReader createReaderInstance(Object extension) {

        return new TIFFImageReader(this);

    }

    public void onRegistration(ServiceRegistry registry,

                               Class<?> category) {

        if (registered) {

            return;

        }

        registered = true;

    }

}