com.twelvemonkeys.imageio.plugins.jpeg.JFXXSegment Maven / Gradle / Ivy

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/*
 * Copyright (c) 2012, Harald Kuhr
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name "TwelveMonkeys" nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.twelvemonkeys.imageio.plugins.jpeg;

import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;

/**
 * JFXXSegment
 *
 * @author Harald Kuhr
 * @author last modified by $Author: haraldk$
 * @version $Id: JFXXSegment.java,v 1.0 23.04.12 16:54 haraldk Exp$
 */
class JFXXSegment {
    public static final int JPEG = 0x10;
    public static final int INDEXED = 0x11;
    public static final int RGB  = 0x13;

    final int extensionCode;
    final byte[] thumbnail;

    private JFXXSegment(int extensionCode, byte[] thumbnail) {
        this.extensionCode = extensionCode;
        this.thumbnail = thumbnail;
    }

    @Override
    public String toString() {
        return String.format("JFXX extension (%s thumb size: %d)", extensionAsString(), thumbnail.length);
    }

    private String extensionAsString() {
        switch (extensionCode) {
            case JPEG:
                return "JPEG";
            case INDEXED:
                return "Indexed";
            case RGB:
                return "RGB";
            default:
                return String.valueOf(extensionCode);
        }
    }

    public static JFXXSegment read(InputStream data, int length) throws IOException {
        DataInputStream stream = new DataInputStream(data);

        return new JFXXSegment(
                stream.readUnsignedByte(),
                JPEGImageReader.readFully(stream, length - 1)
        );
    }
}