public function draw(SVGRenderingHelper $rh, $scaleX, $scaleY, $offsetX = 0, $offsetY = 0)
{
// cannot inherit opacity, so getStyle instead of getComputedStyle
$opacity = $this->getStyle('opacity');
if (isset($opacity) && is_numeric($opacity)) {
$opacity = floatval($opacity);
} else {
$opacity = 1;
}
if ($opacity < 1) {
$buffer = $rh->createBuffer();
for ($i = 0, $n = $this->countChildren(); $i < $n; $i++) {
$child = $this->getChild($i);
$child->draw($buffer, $scaleX, $scaleY, $offsetX, $offsetY);
}
$rh->drawBuffer($buffer, $opacity);
} else {
for ($i = 0, $n = $this->countChildren(); $i < $n; $i++) {
$child = $this->getChild($i);
$child->draw($rh, $scaleX, $scaleY, $offsetX, $offsetY);
}
}
}
