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sources/3rdparty/dompdf/lib/php-font-lib/classes/font_table_kern.cls.php 1.82 KB
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  <?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_table_kern.cls.php 34 2011-10-23 13:53:25Z fabien.menager $
   */
  
  /**
   * `kern` font table.
   * 
   * @package php-font-lib
   */
  class Font_Table_kern extends Font_Table {
    protected function _parse(){
      $font = $this->getFont();
      
      $tableOffset = $font->pos();
      
      $data = $font->unpack(array(
        "version"    => self::uint16,
        "nTables"    => self::uint16,
      
        // only the first subtable will be parsed
        "subtableVersion" => self::uint16,
        "length"     => self::uint16,
        "coverage"   => self::uint16,
      ));
      
      $data["format"] = ($data["coverage"] >> 8);
      
      $subtable = array();
      
      switch($data["format"]) {
        case 0:
        $subtable = $font->unpack(array(
          "nPairs"        => self::uint16,
          "searchRange"   => self::uint16,
          "entrySelector" => self::uint16,
          "rangeShift"    => self::uint16,
        ));
        
        $pairs = array();
        $tree = array();
         
        for ($i = 0; $i < $subtable["nPairs"]; $i++) {
          $left  = $font->readUInt16();
          $right = $font->readUInt16();
          $value = $font->readInt16();
          
          $pairs[] = array(
            "left"  => $left,
            "right" => $right,
            "value" => $value,
          );
          
          $tree[$left][$right] = $value;
        }
        
        //$subtable["pairs"] = $pairs;
        $subtable["tree"] = $tree;
        break;
        
        case 1:
        case 2:
        case 3:
        break;
      }
      
      $data["subtable"] = $subtable;
      
      $this->data = $data;
    }
  }