/**
* Put a image
* GS v0 m xL xH yL yH d1 ... dk
*
* @param string $filename
* @param intger $width
* @param integer $height
* @param integer $size resolution relation
* @throws RuntimeException
*/
public function putImage($filename = '', $width = null, $height = null, $size = 0)
{
try {
$img = new Graphics($filename, $width, $height);
} catch (RuntimeException $e) {
throw new RuntimeException($e->getMessage());
} catch (InvalidArgumentException $e) {
throw new RuntimeException($e->getMessage());
}
$size = self::validateInteger($size, 0, 3, 0);
//get xL xH yL yH
$imgHeader = self::dataHeader(array($img->getWidth(), $img->getHeight()), true);
//send graphics command to printer
$this->buffer->write(self::GS . 'v0' . chr($size) . $imgHeader . $img->getRasterImage());
}
