/**
* @param File|null $imageObject
* @param DOMElement $imageElement
*/
public function processImage($imageObject, $imageElement)
{
if (!$imageObject) {
return;
}
$width = (int) $imageElement->getAttribute('width');
$height = (int) $imageElement->getAttribute('height');
$densities = (array) Config::inst()->get(__CLASS__, 'densities');
$sources = array();
foreach ($densities as $density) {
$density = (int) $density;
$resized = $imageObject->ResizedImage(ceil($width * $density), ceil($height * $density));
// Output in the format "assets/foo.jpg 1x"
$sources[] = $resized->getRelativePath() . " {$density}x";
}
$srcset = implode(', ', $sources);
$imageElement->setAttribute('srcset', $srcset);
}
