the SDL_Surface structure to be copied from.
the SDL_Rect structure representing the rectangle to be copied, may not be NULL.
the SDL_Surface structure that is the blit target.
the SDL_Rect structure representing the target rectangle in the destination surface, may not be NULL.
the SDL_ScaleMode to be used.
true on success or false on failure; call SDL_GetError() for more information.
Threadsafety: The same destination surface should not be used from two threads at once. It is safe to use the same source surface from multiple threads.
Perform low-level surface scaled blitting only.
This is a semi-private function and it performs low-level surface blitting, assuming the input rectangles have already been clipped.