[SDL] Scrolling background

[x5101920 at fedro.ugr.es]

Mensaje citado por: Jan Kratochvil <honza at twin.jikos.cz>:

> Hi,
>  i tried to make scrolling background using SDL and i have to make some
> terible mistake because it is teribly slow.
> I am using resolution 800x600 (32b colors).
> is there any better(faster) solution than using
> 
> SDL_BlitSurface(image, &src, screen, &dest);
> SDL_UpdateRect(screen,0,0,0,0);
> 
> where src y coordinate is incrementing. If i call this two functions in
> for cycle i get speed from 6 up to 10 frames per second.
> Please help.
> Thanx Jan Kratochvil

:)
Welcome to the club.
I can't get more that 30 fps on SDL on 640x480x16 bits by just blitting a 
surface to screen and updating.
The only way to get a real fast thing ( 1000 fps ) is to use 
SDL_HWSURFACE|SDL_FULLSCREEN but it crash on exit. :(

I am looking for the bug, and I will try to report...


                  Miguel Angel Blanch Lardin
 
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