code: protected function drawCenteredChar($character)
  	{
  		$spaces = str_repeat(' ', $this->geometry->getHalfWidth());
  
  		$this->drawRow($spaces . $character);
  	}
docs: Draw a character in the middle of the drawing.
  
  @author	Andrea Marco Sartori
  @param	string	$character
  @return	void