/**
* Add a derivative
*
* @param ImageMedium $image
*/
public function addDerivative(ImageMedium $image)
{
$this->derivatives[$image->url()] = $image->get('width');
}
/**
* Create a new ImageMedium by scaling another ImageMedium object.
*
* @param ImageMedium $medium
* @param int $from
* @param int $to
* @return Medium
*/
public static function scaledFromMedium($medium, $from, $to)
{
if (!$medium instanceof ImageMedium) {
return $medium;
}
if ($to > $from) {
return $medium;
}
$ratio = $to / $from;
$width = (int) ($medium->get('width') * $ratio);
$height = (int) ($medium->get('height') * $ratio);
$basename = $medium->get('basename');
$basename = str_replace('@' . $from . 'x', '@' . $to . 'x', $basename);
$debug = $medium->get('debug');
$medium->set('debug', false);
$file = $medium->resize($width, $height)->path();
$medium->set('debug', $debug);
$size = filesize($file);
$medium = self::fromFile($file);
$medium->set('size', $size);
return ['file' => $medium, 'size' => $size];
}