/*

 * Copyright (c) 2001, 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.jpeg;

import javax.imageio.metadata.IIOInvalidTreeException;

import javax.imageio.metadata.IIOMetadataNode;

import javax.imageio.stream.ImageOutputStream;

import java.io.IOException;

import org.w3c.dom.Node;

/**

     * A DRI (Define Restart Interval) marker segment.

     */

class DRIMarkerSegment extends MarkerSegment {

    /**

     * Restart interval, or 0 if none is specified.

     */

    int restartInterval = 0;

    DRIMarkerSegment(JPEGBuffer buffer)

        throws IOException {

        super(buffer);

        restartInterval = (buffer.buf[buffer.bufPtr++] & 0xff) << 8;

        restartInterval |= buffer.buf[buffer.bufPtr++] & 0xff;

        buffer.bufAvail -= length;

    }

    DRIMarkerSegment(Node node) throws IIOInvalidTreeException {

        super(JPEG.DRI);

        updateFromNativeNode(node, true);

    }

    IIOMetadataNode getNativeNode() {

        IIOMetadataNode node = new IIOMetadataNode("dri");

        node.setAttribute("interval", Integer.toString(restartInterval));

        return node;

    }

    void updateFromNativeNode(Node node, boolean fromScratch)

        throws IIOInvalidTreeException {

        restartInterval = getAttributeValue(node, null, "interval",

                                            0, 65535, true);

    }

    /**

     * Writes the data for this segment to the stream in

     * valid JPEG format.

     */

    void write(ImageOutputStream ios) throws IOException {

        // We don't write DRI segments; the IJG library does.

    }

    void print() {

        printTag("DRI");

        System.out.println("Interval: "

                           + Integer.toString(restartInterval));

    }

}