<?php
  /**
   * @package php-font-lib
   * @link    http://php-font-lib.googlecode.com/
   * @author  Fabien Ménager <fabien.menager@gmail.com>
   * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
   * @version $Id: font_header.cls.php 34 2011-10-23 13:53:25Z fabien.menager $
   */
  
  /**
   * Font header container.
   * 
   * @package php-font-lib
   */
  abstract class Font_Header extends Font_Binary_Stream {
    /**
     * @var Font_TrueType
     */
    protected $font;
    protected $def = array();
    
    public $data;
    
    public function __construct(Font_TrueType $font) {
      $this->font = $font;
    }
    
    public function encode(){
      return $this->font->pack($this->def, $this->data);
    }
    
    public function parse(){
      $this->data = $this->font->unpack($this->def);
    }
  }