BannerImageExtension, for creating background banners on various pages.

BannerImageExtension.php

<?php

class BannerImageExtension extends Extension {
  public function ArtDirectionImage($width, $height) {
    return $this->getFormattedImage('ArtDirectionImage', $width, $height);
  }
  
  public function generateArtDirectionImage(Image_Backend $backend, $width, $height) {
    $backend->set_backend('ImagickBackend');
    print 'SS3.1: BannerImageExtension backend: '.$backend->get_backend();
    return $backend->croppedResize($width, $height);
  }
}