function _responsive_image_image_style_url

Wrapper around image_style_url() so we can return an empty image.

File

core/modules/responsive_image/responsive_image.module, line 492

Code

function _responsive_image_image_style_url($style_name, $path) {
    if ($style_name == ResponsiveImageStyleInterface::EMPTY_IMAGE) {
        // The smallest data URI for a 1px square transparent GIF image.
        // http://probablyprogramming.com/2009/03/15/the-tiniest-gif-ever
        return 'data:image/gif;base64,R0lGODlhAQABAIABAP///wAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==';
    }
    
    /** @var \Drupal\Core\File\FileUrlGeneratorInterface $file_url_generator */
    $file_url_generator = \Drupal::service('file_url_generator');
    $entity = ImageStyle::load($style_name);
    if ($entity instanceof ImageStyle) {
        return $file_url_generator->transformRelative($entity->buildUrl($path));
    }
    return $file_url_generator->generateString($path);
}