<?php
  /**
   * @package php-font-lib
   * @link    https://github.com/PhenX/php-font-lib
   * @author  Fabien Ménager <fabien.menager@gmail.com>
   * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
   */
  namespace FontLib;
  
  use FontLib\TrueType\File;
  
  /**
   * Font header container.
   *
   * @package php-font-lib
   */
  abstract class Header extends BinaryStream
  {
      /**
       * @var File
       */
      protected $font;
      protected $def = array();
  
      public $data;
  
      public function __construct(File $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);
      }
  }