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Thank you very much Freakdave, I will definitely test that. It's very interesting because it is supposed that "SDL_Flip()" does the same that "SDL_UpdateRect(screen, 0, 0, 0, 0)"... Are you talking about XDK or OpenXDK?
Besides, I was not awared that using SDL_SWSURFACE was better than SDL_HWSURFACE in a Xbox. Again, is this related to XDK or OpenXDK?
I am talking about libSDLx (XDK) in both cases:
SDL_Flip() is meant to be used with the SDL_DOUBLEBUF flag, it swaps the display (background, foreground) buffers for systems that support double buffering.
On systems that do not support double buffering, SDL_Flip will do the same as SDL_UpdateRect(screen, 0, 0, 0, 0).
In terms of speed, you should use SDL_HWSURFACE in combination with the SDL_DOUBLEBUF flag ->
http://sdl.beuc.net/...DL_SetVideoModeHOWEVER, for a decent frame rate on the XBOX (XDK, libSDLx) you might want to use the setup provided in my last post.