/**
  * rotate an imagick object based on it's exif data.
  *
  * @param imagick $image an instance of imagick
  * @return void
  */
 protected function _exifRotateImagick($image)
 {
     $orientation = $image->getImageOrientation();
     $trans = $this->_exifOrientationTransformations($orientation);
     if ($trans['flip_vert']) {
         $image->flopImage();
     }
     if ($trans['flip_horz']) {
         $image->flipImage();
     }
     if ($trans['rotate_clockwise']) {
         $image->rotateimage("#000", $trans['rotate_clockwise']);
     }
     $image->setImageOrientation(imagick::ORIENTATION_TOPLEFT);
 }