001/*
002 * $Id: EnumerateTTC.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;
045
046import java.io.IOException;
047import java.util.HashMap;
048
049import com.itextpdf.text.DocumentException;
050import com.itextpdf.text.error_messages.MessageLocalization;
051/** Enumerates all the fonts inside a True Type Collection.
052 *
053 * @author  Paulo Soares
054 */
055class EnumerateTTC extends TrueTypeFont{
056
057    protected String[] names;
058
059    EnumerateTTC(String ttcFile) throws DocumentException, IOException {
060        fileName = ttcFile;
061        rf = new RandomAccessFileOrArray(ttcFile);
062        findNames();
063    }
064
065    EnumerateTTC(byte ttcArray[]) throws DocumentException, IOException {
066        fileName = "Byte array TTC";
067        rf = new RandomAccessFileOrArray(ttcArray);
068        findNames();
069    }
070
071    void findNames() throws DocumentException, IOException {
072        tables = new HashMap<String, int[]>();
073
074        try {
075            String mainTag = readStandardString(4);
076            if (!mainTag.equals("ttcf"))
077                throw new DocumentException(MessageLocalization.getComposedMessage("1.is.not.a.valid.ttc.file", fileName));
078            rf.skipBytes(4);
079            int dirCount = rf.readInt();
080            names = new String[dirCount];
081            int dirPos = rf.getFilePointer();
082            for (int dirIdx = 0; dirIdx < dirCount; ++dirIdx) {
083                tables.clear();
084                rf.seek(dirPos);
085                rf.skipBytes(dirIdx * 4);
086                directoryOffset = rf.readInt();
087                rf.seek(directoryOffset);
088                if (rf.readInt() != 0x00010000)
089                    throw new DocumentException(MessageLocalization.getComposedMessage("1.is.not.a.valid.ttf.file", fileName));
090                int num_tables = rf.readUnsignedShort();
091                rf.skipBytes(6);
092                for (int k = 0; k < num_tables; ++k) {
093                    String tag = readStandardString(4);
094                    rf.skipBytes(4);
095                    int table_location[] = new int[2];
096                    table_location[0] = rf.readInt();
097                    table_location[1] = rf.readInt();
098                    tables.put(tag, table_location);
099                }
100                names[dirIdx] = getBaseFont();
101            }
102        }
103        finally {
104            if (rf != null)
105                rf.close();
106        }
107    }
108
109    String[] getNames() {
110        return names;
111    }
112
113}