function clipping_roundrectangle($x1, $y1, $w, $h, $rTL, $rTR, $rBR, $rBL)
 {
     $this->_pdf->clippingRectangleRounded($x1, $this->y($y1) - $h, $w, $h, $rTL, $rTR, $rBR, $rBL);
 }