if ( count( $viewBox ) == 4 ) {
$viewWidth = $this->scaleSVGUnit( $viewBox[2] );
$viewHeight = $this->scaleSVGUnit( $viewBox[3] );
if ( count( $viewBox ) == 4 ) {
$viewWidth = $this->scaleSVGUnit( $viewBox[2] );
$viewHeight = $this->scaleSVGUnit( $viewBox[3] );