001/*
002 * $Id: InputMeta.java 4784 2011-03-15 08:33:00Z blowagie $
003 *
004 * This file is part of the iText (R) project.
005 * Copyright (c) 1998-2011 1T3XT BVBA
006 * Authors: Bruno Lowagie, Paulo Soares, et al.
007 *
008 * This program is free software; you can redistribute it and/or modify
009 * it under the terms of the GNU Affero General Public License version 3
010 * as published by the Free Software Foundation with the addition of the
011 * following permission added to Section 15 as permitted in Section 7(a):
012 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY 1T3XT,
013 * 1T3XT DISCLAIMS THE WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
014 *
015 * This program is distributed in the hope that it will be useful, but
016 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
017 * or FITNESS FOR A PARTICULAR PURPOSE.
018 * See the GNU Affero General Public License for more details.
019 * You should have received a copy of the GNU Affero General Public License
020 * along with this program; if not, see http://www.gnu.org/licenses or write to
021 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
022 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
023 * http://itextpdf.com/terms-of-use/
024 *
025 * The interactive user interfaces in modified source and object code versions
026 * of this program must display Appropriate Legal Notices, as required under
027 * Section 5 of the GNU Affero General Public License.
028 *
029 * In accordance with Section 7(b) of the GNU Affero General Public License,
030 * a covered work must retain the producer line in every PDF that is created
031 * or manipulated using iText.
032 *
033 * You can be released from the requirements of the license by purchasing
034 * a commercial license. Buying such a license is mandatory as soon as you
035 * develop commercial activities involving the iText software without
036 * disclosing the source code of your own applications.
037 * These activities include: offering paid services to customers as an ASP,
038 * serving PDFs on the fly in a web application, shipping iText with a closed
039 * source product.
040 *
041 * For more information, please contact iText Software Corp. at this
042 * address: sales@itextpdf.com
043 */
044package com.itextpdf.text.pdf.codec.wmf;
045
046import com.itextpdf.text.BaseColor;
047import java.io.IOException;
048import java.io.InputStream;
049
050import com.itextpdf.text.Utilities;
051
052public class InputMeta {
053    
054    InputStream in;
055    int length;
056    
057    public InputMeta(InputStream in) {
058        this.in = in;
059    }
060
061    public int readWord() throws IOException{
062        length += 2;
063        int k1 = in.read();
064        if (k1 < 0)
065            return 0;
066        return (k1 + (in.read() << 8)) & 0xffff;
067    }
068
069    public int readShort() throws IOException{
070        int k = readWord();
071        if (k > 0x7fff)
072            k -= 0x10000;
073        return k;
074    }
075
076    public int readInt() throws IOException{
077        length += 4;
078        int k1 = in.read();
079        if (k1 < 0)
080            return 0;
081        int k2 = in.read() << 8;
082        int k3 = in.read() << 16;
083        return k1 + k2 + k3 + (in.read() << 24);
084    }
085    
086    public int readByte() throws IOException{
087        ++length;
088        return in.read() & 0xff;
089    }
090    
091    public void skip(int len) throws IOException{
092        length += len;
093        Utilities.skip(in, len);
094    }
095    
096    public int getLength() {
097        return length;
098    }
099    
100    public BaseColor readColor() throws IOException{
101        int red = readByte();
102        int green = readByte();
103        int blue = readByte();
104        readByte();
105        return new BaseColor(red, green, blue);
106    }
107}