/*******************************************************************************
 * Copyright (c) 2000, 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
module dwt.internal.image.JPEGFixedSizeSegment;


import dwt.SWT;
import dwt.internal.image.JPEGSegment;
import dwt.internal.image.LEDataInputStream;

import tango.core.Exception;


abstract class JPEGFixedSizeSegment : JPEGSegment {

	public this() {
		reference = new byte[fixedSize()];
		setSegmentMarker(signature());
	}

	public this(byte[] reference) {
		super(reference);
	}

	public this(LEDataInputStream byteStream) {
		reference = new byte[fixedSize()];
		try {
			byteStream.read(reference);
		} catch (TracedException e) {
			SWT.error(SWT.ERROR_IO, e);
		}
	}

	abstract public int fixedSize();

	public int getSegmentLength() {
		return fixedSize() - 2;
	}

	public void setSegmentLength(int length) {
	}
}