7 scale: (float * float) option;
8 rotate: (float * float) option;
28 | `Rect of int*int*int*int
29 | `RGB of int * int * int
30 | `RGBA of int * int * int * int
31 | `ARGB of int * int * int * int
39 | `Size of (int -> s list) * s list
42 type t = [ s | backpatch ]
44 val to_list : t list -> int list