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Java > Open Source Codes > org > pdfbox > ttf > IndexToLocationTable


1 /**
2  * Copyright (c) 2004, www.pdfbox.org
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions are met:
7  *
8  * 1. Redistributions of source code must retain the above copyright notice,
9  * this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright notice,
11  * this list of conditions and the following disclaimer in the documentation
12  * and/or other materials provided with the distribution.
13  * 3. Neither the name of pdfbox; nor the names of its
14  * contributors may be used to endorse or promote products derived from this
15  * software without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
18  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20  * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
24  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
26  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27  *
28  * http://www.pdfbox.org
29  *
30  */
31 package org.pdfbox.ttf;
32
33 import java.io.IOException JavaDoc;
34
35 /**
36  * A table in a true type font.
37  *
38  * @author Ben Litchfield (ben@csh.rit.edu)
39  * @version $Revision: 1.1 $
40  */
41 public class IndexToLocationTable extends TTFTable
42 {
43     private static final short SHORT_OFFSETS = 0;
44     private static final short LONG_OFFSETS = 1;
45     
46     /**
47      * A tag that identifies this table type.
48      */
49     public static final String JavaDoc TAG = "loca";
50     
51     private long[] offsets;
52     
53     /**
54      * This will read the required data from the stream.
55      *
56      * @param ttf The font that is being read.
57      * @param data The stream to read the data from.
58      * @throws IOException If there is an error reading the data.
59      */
60     public void initData( TrueTypeFont ttf, TTFDataStream data ) throws IOException JavaDoc
61     {
62         HeaderTable head = ttf.getHeader();
63         MaximumProfileTable maxp = ttf.getMaximumProfile();
64         int numGlyphs = maxp.getNumGlyphs();
65         offsets = new long[ numGlyphs +1];
66         for( int i=0; i<numGlyphs+1; i++ )
67         {
68             if( head.getIndexToLocFormat() == SHORT_OFFSETS )
69             {
70                 offsets[i] = data.readUnsignedShort() * 2;
71             }
72             else if( head.getIndexToLocFormat() == LONG_OFFSETS )
73             {
74                 offsets[i] = data.readUnsignedInt();
75             }
76             else
77             {
78                 throw new IOException JavaDoc( "Error:TTF.loca unknown offset format.");
79             }
80         }
81     }
82     /**
83      * @return Returns the offsets.
84      */
85     public long[] getOffsets()
86     {
87         return offsets;
88     }
89     /**
90      * @param offsetsValue The offsets to set.
91      */
92     public void setOffsets(long[] offsetsValue)
93     {
94         this.offsets = offsetsValue;
95     }
96 }
97
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