/**
  * Render the background
  *
  * @param ezcGraphRenderer $renderer Renderer
  * @param ezcGraphBoundings $boundings Boundings
  * @return ezcGraphBoundings Remaining boundings
  */
 public function render(ezcGraphRenderer $renderer, ezcGraphBoundings $boundings)
 {
     $boundings = $renderer->drawBox($boundings, $this->background, $this->border, $this->borderWidth, $this->margin, $this->padding);
     if ($this->image === false) {
         return $boundings;
     }
     $renderer->drawBackgroundImage($boundings, $this->image, $this->position, $this->repeat);
     return $boundings;
 }