/**
  * Get the bounding box
  * $returns array $bbox of numeric. The bounding box in llx lly urx ury order
  */
 public function getBoundingBox()
 {
     if ($this->direction != -1) {
         return $this->font_metrics[$direction]->getBoundingBox();
     } else {
         return parent::getBoundingBox();
     }
 }