<?php
  /**
   * @package php-font-lib
   * @link    https://github.com/dompdf/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);
    }
  }