public function draw(SVGRenderingHelper $rh, $scaleX, $scaleY, $offsetX = 0, $offsetY = 0)
{
$rh->push();
$opacity = $this->getStyle('opacity');
if (isset($opacity) && is_numeric($opacity)) {
$opacity = floatval($opacity);
$rh->scaleOpacity($opacity);
}
// original (document fragment) width for unit parsing
$ow = $rh->getWidth() / $scaleX;
$x1 = ($offsetX + $this->x1) * $scaleX;
$y1 = ($offsetY + $this->y1) * $scaleY;
$x2 = ($offsetX + $this->x2) * $scaleX;
$y2 = ($offsetY + $this->y2) * $scaleY;
$stroke = $this->getComputedStyle('stroke');
if (isset($stroke) && $stroke !== 'none') {
$strokeColor = SVG::parseColor($stroke, true);
$rh->setStrokeWidth(SVG::convertUnit($this->getComputedStyle('stroke-width'), $ow) * $scaleX);
$rh->drawLine($x1, $y1, $x2, $y2, $strokeColor);
}
$rh->pop();
}