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This is a backport of OpenJFX 8 to run on Java 7.

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/*
 * Copyright (c) 2009, 2013, 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.javafx.iio.gif;

import com.sun.javafx.iio.common.ImageDescriptor;

public class GIFDescriptor extends ImageDescriptor {
    private static final String formatName = "GIF";

    private static final String[] extensions = { "gif" };

    private static final Signature[] signatures = {
        new Signature(new byte[] { 'G', 'I', 'F', '8', '7', 'a' }),
        new Signature(new byte[] { 'G', 'I', 'F', '8', '9', 'a' })
    };

//    private static final String[] MIMETypes = { "image/gif" };

    private static ImageDescriptor theInstance = null;

    private GIFDescriptor() {
        super(formatName, extensions, signatures);
    }

    public static synchronized ImageDescriptor getInstance() {
        if (theInstance == null) {
            theInstance = new GIFDescriptor();
        }
        return theInstance;
    }
}