Function sdl2_sys::SDL_LowerBlit

pub unsafe extern "C" fn SDL_LowerBlit(
    src: *mut SDL_Surface, 
    srcrect: *mut SDL_Rect, 
    dst: *mut SDL_Surface, 
    dstrect: *mut SDL_Rect
) -> c_int

This is a semi-private blit function and it performs low-level surface blitting only.