Function sdl2_sys::SDL_UpperBlitScaled

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

This is the public scaled blit function, SDL_BlitScaled(), and it performs rectangle validation and clipping before passing it to SDL_LowerBlitScaled()