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

import java.io.*;

/**
 * Concrete implementation of the TrueType Font, read from a TTF File.
 *
 * @author Mark Donszelmann
 * @version $Id: TTFFile.java,v 1.1 2001/11/29 01:45:29 duns 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);
            int checksum = ttf.readInt();
            int offset = ttf.readInt();
            int len = ttf.readInt();
	    TTFInput input = new TTFFileInput(ttf, offset, len, checksum);
	    newTable(tag, input);
        }
    }

    public int getFontVersion() {
	return sfntMajorVersion;
    }
    
    public void close() throws IOException {
	super.close();
        ttf.close();
    }


    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);
    }        
 
}
