* Merge a parameter array into a string appropriate for inclusion in filenames
*
* @param $params array Array of parameters that have been through normaliseParams.
+ * @return String
*/
abstract function makeParamString( $params );
/**
* Parse a param string made with makeParamString back into an array
*
- * @param $str string
+ * @param $str string The parameter string without file name (e.g. 122px)
+ * @return Array|Boolean Array of parameters or false on failure.
*/
abstract function parseParamString( $str );
public static function canRotate() {
return false;
}
+
+ /**
+ * On supporting image formats, try to read out the low-level orientation
+ * of the file and return the angle that the file needs to be rotated to
+ * be viewed.
+ *
+ * This information is only useful when manipulating the original file;
+ * the width and height we normally work with is logical, and will match
+ * any produced output views.
+ *
+ * For files we don't know, we return 0.
+ *
+ * @param $file File
+ * @return int 0, 90, 180 or 270
+ */
+ public function getRotation( $file ) {
+ return 0;
+ }
+
}