/**
* Process responsive images: add 1.5x and 2x subimages to the thumbnail, where
* applicable.
*
* @param File $file
* @param MediaTransformOutput $thumb
* @param array $hp Image parameters
*/
public static function processResponsiveImages($file, $thumb, $hp)
{
global $wgResponsiveImages;
if ($wgResponsiveImages && $thumb && !$thumb->isError()) {
$hp15 = $hp;
$hp15['width'] = round($hp['width'] * 1.5);
$hp20 = $hp;
$hp20['width'] = $hp['width'] * 2;
if (isset($hp['height'])) {
$hp15['height'] = round($hp['height'] * 1.5);
$hp20['height'] = $hp['height'] * 2;
}
$thumb15 = $file->transform($hp15);
$thumb20 = $file->transform($hp20);
if ($thumb15 && !$thumb15->isError() && $thumb15->getUrl() !== $thumb->getUrl()) {
$thumb->responsiveUrls['1.5'] = $thumb15->getUrl();
}
if ($thumb20 && !$thumb20->isError() && $thumb20->getUrl() !== $thumb->getUrl()) {
$thumb->responsiveUrls['2'] = $thumb20->getUrl();
}
}
}
