TTFFile.java

// Copyright 2001, FreeHEP.
package org.freehep.graphicsio.font.truetype;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;

import org.geogebra.common.util.Charsets;

/**
 * Concrete implementation of the TrueType Font, read from a TTF File.
 * 
 * @author Mark Donszelmann
 * @version $Id: TTFFile.java,v 1.5 2009-08-17 21:44:45 murkle Exp $
 */
public class TTFFile extends TTFFont {

	private static final String mode = "r";

	private String fileName;

	private RandomAccessFile ttf;

	private int sfntMajorVersion;

	private int sfntMinorVersion;

	private int numberOfTables;

	private int searchRange;

	private int entrySelector;

	private int rangeShift;

	public TTFFile(String name) throws FileNotFoundException, IOException {
		fileName = name;
		ttf = new RandomAccessFile(name, mode);

		// read table directory
		ttf.seek(0);
		sfntMajorVersion = ttf.readUnsignedShort();
		sfntMinorVersion = ttf.readUnsignedShort();
		numberOfTables = ttf.readUnsignedShort();
		searchRange = ttf.readUnsignedShort();
		entrySelector = ttf.readUnsignedShort();
		rangeShift = ttf.readUnsignedShort();

		// read table entries
		for (int i = 0; i < numberOfTables; i++) {
			ttf.seek(12 + i * 16);
			byte b[] = new byte[4];
			ttf.readFully(b);
			String tag = new String(b, Charsets.UTF_8);
			int checksum = ttf.readInt();
			int offset = ttf.readInt();
			int len = ttf.readInt();
			TTFInput input = new TTFFileInput(ttf, offset, len, checksum);
			newTable(tag, input);
		}
	}

	@Override
	public int getFontVersion() {
		return sfntMajorVersion;
	}

	@Override
	public void close() throws IOException {
		super.close();
		ttf.close();
	}

	@Override
	public void show() {
		super.show();

		System.out.println("Font: " + fileName);
		System.out.println(
				"  sfnt: " + sfntMajorVersion + "." + sfntMinorVersion);
		System.out.println("  numTables: " + numberOfTables);
		System.out.println("  searchRange: " + searchRange);
		System.out.println("  entrySelector: " + entrySelector);
		System.out.println("  rangeShift: " + rangeShift);
	}

}