[SDL] Why to specify the screen in SDL_UpdateRect(s) ?

[Miguel Pragier]

Hello.

I ways use the SDL_UpdateRect(s) routine to refresh a piece of the
surface defined as SCREEN with SDL_SetVideoMode().

But observing that is necessary to specify "what surface to refresh" in
first parameter, a question occurs me: Is there another use to
SDL_UpdateRect(s)?

Why would I update other surface than the screen surface?


M.P.
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