org.apache.fontbox.ttf.AbstractTTFParser Maven / Gradle / Ivy
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Tool to convert CSV and XLS to XML, to transform XML and to convert XML to CSV, HTML, other text files, PDF etc., useful as command line tool and integrated in other projects.
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.fontbox.ttf;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
abstract class AbstractTTFParser {
protected boolean isEmbedded = false;
public AbstractTTFParser(boolean isEmbedded) {
this.isEmbedded = isEmbedded;
}
/**
* Parse a file and get a true type font.
* @param ttfFile The TTF file.
* @return A true type font.
* @throws IOException If there is an error parsing the true type font.
*/
public TrueTypeFont parseTTF( String ttfFile ) throws IOException
{
RAFDataStream raf = new RAFDataStream( ttfFile, "r" );
return parseTTF( raf );
}
/**
* Parse a file and get a true type font.
* @param ttfFile The TTF file.
* @return A true type font.
* @throws IOException If there is an error parsing the true type font.
*/
public TrueTypeFont parseTTF( File ttfFile ) throws IOException
{
RAFDataStream raf = new RAFDataStream( ttfFile, "r" );
return parseTTF( raf );
}
/**
* Parse a file and get a true type font.
* @param ttfData The TTF data to parse.
* @return A true type font.
* @throws IOException If there is an error parsing the true type font.
*/
public TrueTypeFont parseTTF( InputStream ttfData ) throws IOException
{
return parseTTF( new MemoryTTFDataStream( ttfData ));
}
/**
* Parse a file and get a true type font.
* @param raf The TTF file.
* @return A true type font.
* @throws IOException If there is an error parsing the true type font.
*/
public TrueTypeFont parseTTF( TTFDataStream raf ) throws IOException
{
TrueTypeFont font = new TrueTypeFont( raf );
font.setVersion( raf.read32Fixed() );
int numberOfTables = raf.readUnsignedShort();
int searchRange = raf.readUnsignedShort();
int entrySelector = raf.readUnsignedShort();
int rangeShift = raf.readUnsignedShort();
for( int i=0; i initialized = new ArrayList();
HeaderTable head = font.getHeader();
if (head == null)
{
throw new IOException("head is mandatory");
}
raf.seek( head.getOffset() );
head.initData( font, raf );
initialized.add( head );
HorizontalHeaderTable hh = font.getHorizontalHeader();
if (hh == null)
{
throw new IOException("hhead is mandatory");
}
raf.seek( hh.getOffset() );
hh.initData( font, raf );
initialized.add( hh );
MaximumProfileTable maxp = font.getMaximumProfile();
if (maxp != null)
{
raf.seek( maxp.getOffset() );
maxp.initData( font, raf );
initialized.add( maxp );
}
else
{
throw new IOException("maxp is mandatory");
}
PostScriptTable post = font.getPostScript();
if (post != null) {
raf.seek( post.getOffset() );
post.initData( font, raf );
initialized.add( post );
}
else if ( !isEmbedded )
{
// in an embedded font this table is optional
throw new IOException("post is mandatory");
}
IndexToLocationTable loc = font.getIndexToLocation();
if (loc == null)
{
throw new IOException("loca is mandatory");
}
raf.seek( loc.getOffset() );
loc.initData( font, raf );
initialized.add( loc );
boolean cvt = false, prep = false, fpgm = false;
Iterator iter = font.getTables().iterator();
while( iter.hasNext() )
{
TTFTable table = iter.next();
if( !initialized.contains( table ) )
{
raf.seek( table.getOffset() );
table.initData( font, raf );
}
if (table.getTag().startsWith("cvt"))
{
cvt = true;
}
else if ("prep".equals(table.getTag()))
{
prep = true;
}
else if ("fpgm".equals(table.getTag()))
{
fpgm = true;
}
}
// check others mandatory tables
if ( font.getGlyph() == null )
{
throw new IOException("glyf is mandatory");
}
if ( font.getNaming() == null && !isEmbedded )
{
throw new IOException("name is mandatory");
}
if ( font.getHorizontalMetrics() == null )
{
throw new IOException("hmtx is mandatory");
}
if (isEmbedded) {
// in a embedded truetype font prep, cvt_ and fpgm tables
// are mandatory
if (!fpgm)
{
throw new IOException("fpgm is mandatory");
}
if (!prep)
{
throw new IOException("prep is mandatory");
}
if (!cvt)
{
throw new IOException("cvt_ is mandatory");
}
}
}
private TTFTable readTableDirectory( TTFDataStream raf ) throws IOException
{
TTFTable retval = null;
String tag = raf.readString( 4 );
if( tag.equals( CMAPTable.TAG ) )
{
retval = new CMAPTable();
}
else if( tag.equals( GlyphTable.TAG ) )
{
retval = new GlyphTable();
}
else if( tag.equals( HeaderTable.TAG ) )
{
retval = new HeaderTable();
}
else if( tag.equals( HorizontalHeaderTable.TAG ) )
{
retval = new HorizontalHeaderTable();
}
else if( tag.equals( HorizontalMetricsTable.TAG ) )
{
retval = new HorizontalMetricsTable();
}
else if( tag.equals( IndexToLocationTable.TAG ) )
{
retval = new IndexToLocationTable();
}
else if( tag.equals( MaximumProfileTable.TAG ) )
{
retval = new MaximumProfileTable();
}
else if( tag.equals( NamingTable.TAG ) )
{
retval = new NamingTable();
}
else if( tag.equals( OS2WindowsMetricsTable.TAG ) )
{
retval = new OS2WindowsMetricsTable();
}
else if( tag.equals( PostScriptTable.TAG ) )
{
retval = new PostScriptTable();
}
else if( tag.equals( DigitalSignatureTable.TAG ) )
{
retval = new DigitalSignatureTable();
}
else
{
//unknown table type but read it anyway.
retval = new TTFTable();
}
retval.setTag( tag );
retval.setCheckSum( raf.readUnsignedInt() );
retval.setOffset( raf.readUnsignedInt() );
retval.setLength( raf.readUnsignedInt() );
return retval;
}
}