Function apply_libraw_flip 

fn apply_libraw_flip(pixbuf: &Pixbuf, flip: c_int) -> Pixbuf

Apply libraw flip orientation to a Pixbuf.

libraw flip values: 0 — no rotation (identity) 3 — 180 degrees 5 — 90 CCW (270 CW) 6 — 90 CW

Other values (rare) are left unrotated.