1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.fontbox.ttf;
18
19 import java.io.IOException;
20
21 /**
22 * A table in a true type font.
23 *
24 * @author Ben Litchfield (ben@benlitchfield.com)
25 * @version $Revision: 1.1 $
26 */
27 public class IndexToLocationTable extends TTFTable
28 {
29 private static final short SHORT_OFFSETS = 0;
30 private static final short LONG_OFFSETS = 1;
31
32 /**
33 * A tag that identifies this table type.
34 */
35 public static final String TAG = "loca";
36
37 private long[] offsets;
38
39 /**
40 * This will read the required data from the stream.
41 *
42 * @param ttf The font that is being read.
43 * @param data The stream to read the data from.
44 * @throws IOException If there is an error reading the data.
45 */
46 public void initData( TrueTypeFont ttf, TTFDataStream data ) throws IOException
47 {
48 HeaderTable head = ttf.getHeader();
49 MaximumProfileTable maxp = ttf.getMaximumProfile();
50 int numGlyphs = maxp.getNumGlyphs();
51 offsets = new long[ numGlyphs +1];
52 for( int i=0; i<numGlyphs+1; i++ )
53 {
54 if( head.getIndexToLocFormat() == SHORT_OFFSETS )
55 {
56 offsets[i] = data.readUnsignedShort() * 2;
57 }
58 else if( head.getIndexToLocFormat() == LONG_OFFSETS )
59 {
60 offsets[i] = data.readUnsignedInt();
61 }
62 else
63 {
64 throw new IOException( "Error:TTF.loca unknown offset format.");
65 }
66 }
67 }
68 /**
69 * @return Returns the offsets.
70 */
71 public long[] getOffsets()
72 {
73 return offsets;
74 }
75 /**
76 * @param offsetsValue The offsets to set.
77 */
78 public void setOffsets(long[] offsetsValue)
79 {
80 this.offsets = offsetsValue;
81 }
82 }