Framerate With Sdl Options

[hcf]

I am planning to port a Windows game made with SDL, to the Xbox. So, I have made a first attempt using libSDLx with OpenXDK, but the framerate is horrible (around 7 FPS). I use 640x480 resolution and I must refresh the full screen in every frame (think that it's a SuperMarioBros-like game with scrolling background). Of course if I only refresh a little section of the screen, the FPS boosts up, but it is not possible to do this in this kind of game. And I think that 7 FPS is too much slow...

Do anyone has worked with libSDLx and knows what framerate could be expected? For example, if I use libSDLx with XDK (and not OpenXDK), would I get a better performance? Also, I saw a post of the year 2006 where friedgold said that he made a patch to correct this issue:

http://forums.xbox-scene.com/index.php?sho...amp;mode=linear

But that patch is not online anymore. In any case, I guess that this patch was added to the libSDLx distribution lately, correct?

So, I would need some help from someone who has worked with SDL on the Xbox. What is the way to get a best framerate? XDK is better than OpenXDK? Any option of the Video Mode? (I think that I have tried with all the options...) Any patch for libSDLx to upgrade the framerate?
Thank you very much!!

[freakdave]

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/sdl.wiki/SDL_SetVideoMode

HOWEVER, for a decent frame rate on the XBOX (XDK, libSDLx) you might want to use the setup provided in my last post.