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.File;
20 import java.io.IOException;
21 import java.io.InputStream;
22
23 import java.util.ArrayList;
24 import java.util.Iterator;
25 import java.util.List;
26
27 /**
28 * A true type font file parser.
29 *
30 * @author Ben Litchfield (ben@benlitchfield.com)
31 * @version $Revision: 1.2 $
32 */
33 public class TTFParser
34 {
35 /**
36 * A simple command line program to test parsing of a TTF file. <br/>
37 * usage: java org.pdfbox.ttf.TTFParser <ttf-file>
38 *
39 * @param args The command line arguments.
40 *
41 * @throws IOException If there is an error while parsing the font file.
42 */
43 public static void main( String[] args ) throws IOException
44 {
45 if( args.length != 1 )
46 {
47 System.err.println( "usage: java org.pdfbox.ttf.TTFParser <ttf-file>" );
48 System.exit( -1 );
49 }
50 TTFParser parser = new TTFParser();
51 TrueTypeFont font = parser.parseTTF( args[0] );
52 System.out.println( "Font:" + font );
53 }
54
55 /**
56 * Parse a file and get a true type font.
57 * @param ttfFile The TTF file.
58 * @return A true type font.
59 * @throws IOException If there is an error parsing the true type font.
60 */
61 public TrueTypeFont parseTTF( String ttfFile ) throws IOException
62 {
63 RAFDataStream raf = new RAFDataStream( ttfFile, "r" );
64 return parseTTF( raf );
65 }
66
67 /**
68 * Parse a file and get a true type font.
69 * @param ttfFile The TTF file.
70 * @return A true type font.
71 * @throws IOException If there is an error parsing the true type font.
72 */
73 public TrueTypeFont parseTTF( File ttfFile ) throws IOException
74 {
75 RAFDataStream raf = new RAFDataStream( ttfFile, "r" );
76 return parseTTF( raf );
77 }
78
79 /**
80 * Parse a file and get a true type font.
81 * @param ttfData The TTF data to parse.
82 * @return A true type font.
83 * @throws IOException If there is an error parsing the true type font.
84 */
85 public TrueTypeFont parseTTF( InputStream ttfData ) throws IOException
86 {
87 return parseTTF( new MemoryTTFDataStream( ttfData ));
88 }
89
90 /**
91 * Parse a file and get a true type font.
92 * @param raf The TTF file.
93 * @return A true type font.
94 * @throws IOException If there is an error parsing the true type font.
95 */
96 public TrueTypeFont parseTTF( TTFDataStream raf ) throws IOException
97 {
98 TrueTypeFont font = new TrueTypeFont( raf );
99 font.setVersion( raf.read32Fixed() );
100 int numberOfTables = raf.readUnsignedShort();
101 int searchRange = raf.readUnsignedShort();
102 int entrySelector = raf.readUnsignedShort();
103 int rangeShift = raf.readUnsignedShort();
104 for( int i=0; i<numberOfTables; i++ )
105 {
106 TTFTable table = readTableDirectory( raf );
107 font.addTable( table );
108 }
109 List<TTFTable> initialized = new ArrayList<TTFTable>();
110 //need to initialize a couple tables in a certain order
111 HeaderTable head = font.getHeader();
112 raf.seek( head.getOffset() );
113 head.initData( font, raf );
114 initialized.add( head );
115
116
117 HorizontalHeaderTable hh = font.getHorizontalHeader();
118 raf.seek( hh.getOffset() );
119 hh.initData( font, raf );
120 initialized.add( hh );
121
122 MaximumProfileTable maxp = font.getMaximumProfile();
123 raf.seek( maxp.getOffset() );
124 maxp.initData( font, raf );
125 initialized.add( maxp );
126
127 PostScriptTable post = font.getPostScript();
128 raf.seek( post.getOffset() );
129 post.initData( font, raf );
130 initialized.add( post );
131
132 IndexToLocationTable loc = font.getIndexToLocation();
133 raf.seek( loc.getOffset() );
134 loc.initData( font, raf );
135 initialized.add( loc );
136
137 Iterator<TTFTable> iter = font.getTables().iterator();
138 while( iter.hasNext() )
139 {
140 TTFTable table = iter.next();
141 if( !initialized.contains( table ) )
142 {
143 raf.seek( table.getOffset() );
144 table.initData( font, raf );
145 }
146 }
147 return font;
148 }
149
150 private TTFTable readTableDirectory( TTFDataStream raf ) throws IOException
151 {
152 TTFTable retval = null;
153 String tag = raf.readString( 4 );
154 if( tag.equals( CMAPTable.TAG ) )
155 {
156 retval = new CMAPTable();
157 }
158 else if( tag.equals( GlyphTable.TAG ) )
159 {
160 retval = new GlyphTable();
161 }
162 else if( tag.equals( HeaderTable.TAG ) )
163 {
164 retval = new HeaderTable();
165 }
166 else if( tag.equals( HorizontalHeaderTable.TAG ) )
167 {
168 retval = new HorizontalHeaderTable();
169 }
170 else if( tag.equals( HorizontalMetricsTable.TAG ) )
171 {
172 retval = new HorizontalMetricsTable();
173 }
174 else if( tag.equals( IndexToLocationTable.TAG ) )
175 {
176 retval = new IndexToLocationTable();
177 }
178 else if( tag.equals( MaximumProfileTable.TAG ) )
179 {
180 retval = new MaximumProfileTable();
181 }
182 else if( tag.equals( NamingTable.TAG ) )
183 {
184 retval = new NamingTable();
185 }
186 else if( tag.equals( OS2WindowsMetricsTable.TAG ) )
187 {
188 retval = new OS2WindowsMetricsTable();
189 }
190 else if( tag.equals( PostScriptTable.TAG ) )
191 {
192 retval = new PostScriptTable();
193 }
194 else if( tag.equals( GlyphTable.TAG ) )
195 {
196 retval = new GlyphTable();
197 }
198 else if( tag.equals( GlyphTable.TAG ) )
199 {
200 retval = new GlyphTable();
201 }
202 else if( tag.equals( DigitalSignatureTable.TAG ) )
203 {
204 retval = new DigitalSignatureTable();
205 }
206 else
207 {
208 //unknown table type but read it anyway.
209 retval = new TTFTable();
210 }
211 retval.setTag( tag );
212 retval.setCheckSum( raf.readUnsignedInt() );
213 retval.setOffset( raf.readUnsignedInt() );
214 retval.setLength( raf.readUnsignedInt() );
215 return retval;
216 }
217 }