using System;
using System.IO;
using iTextSharp.text;

/*
 * $Id: InputMeta.cs,v 1.4 2008/05/13 11:25:36 psoares33 Exp $
 * 
 *
 * Copyright 2001, 2002 Paulo Soares
 *
 * The contents of this file are subject to the Mozilla Public License Version 1.1
 * (the "License"); you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the License.
 *
 * The Original Code is 'iText, a free JAVA-PDF library'.
 *
 * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
 * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
 * All Rights Reserved.
 * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
 * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
 *
 * Contributor(s): all the names of the contributors are added in the source code
 * where applicable.
 *
 * Alternatively, the contents of this file may be used under the terms of the
 * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
 * provisions of LGPL are applicable instead of those above.  If you wish to
 * allow use of your version of this file only under the terms of the LGPL
 * License and not to allow others to use your version of this file under
 * the MPL, indicate your decision by deleting the provisions above and
 * replace them with the notice and other provisions required by the LGPL.
 * If you do not delete the provisions above, a recipient may use your version
 * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the MPL as stated above or under the terms of the GNU
 * Library General Public License as published by the Free Software Foundation;
 * either version 2 of the License, or any later version.
 *
 * This library 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 Library general Public License for more
 * details.
 *
 * If you didn't download this code from the following link, you should check if
 * you aren't using an obsolete version:
 * http://www.lowagie.com/iText/
 */

namespace iTextSharp.text.pdf.codec.wmf {
    /// <summary>
    /// Summary description for InputMeta.
    /// </summary>
    public class InputMeta {
    
        Stream sr;
        int length;
    
        public InputMeta(Stream istr) {
            this.sr = istr;
        }

        public int ReadWord() {
            length += 2;
            int k1 = sr.ReadByte();
            if (k1 < 0)
                return 0;
            return (k1 + (sr.ReadByte() << 8)) & 0xffff;
        }

        public int ReadShort() {
            int k = ReadWord();
            if (k > 0x7fff)
                k -= 0x10000;
            return k;
        }

        public Int32 ReadInt() {
            length += 4;
            int k1 = sr.ReadByte();
            if (k1 < 0)
                return 0;
            int k2 = sr.ReadByte() << 8;
            int k3 = sr.ReadByte() << 16;
            return k1 + k2 + k3 + (sr.ReadByte() << 24);
        }
    
        public int ReadByte() {
            ++length;
            return sr.ReadByte() & 0xff;
        }
    
        public void Skip(int len) {
            length += len;
            Utilities.Skip(sr, len);
        }
    
        public int Length {
            get {
                return length;
            }
        }
    
        public Color ReadColor() {
            int red = ReadByte();
            int green = ReadByte();
            int blue = ReadByte();
            ReadByte();
            return new Color(red, green, blue);
        }
    }
}