[SDL] need a few sugestions from you

Jan Kratochvil honza at twin.jikos.cz
Wed Aug 8 05:57:01 PDT 2001


hi,
 i am green in sdl but i think that use of SDL_DisplayFormat should help.

Jan Kratochvil.
> mornin' guys,
>
> i have the following procedure that fades out the current screen to the color given.
>
> void fade_out(Uint32 color) {
>         SDL_Surface *s;
>         short int e;
>         s = SDL_CreateRGBSurface(SDL_SWSURFACE, SCREEN->w, SCREEN->h,
>                                  SCREEN->format->BitsPerPixel,
>                                  SCREEN->format->Rmask,
>                                  SCREEN->format->Gmask,
>                                  SCREEN->format->Bmask,
>                                  SCREEN->format->Amask);
>         SDL_BlitSurface(SCREEN, NULL, s, NULL);
>
>        for(e = 255; e > 0; e -= 10) {
>                 SDL_FillRect(SCREEN, NULL, color);
>                 SDL_SetAlpha(s, SDL_SRCALPHA|SDL_RLEACCEL, e);
>                 SDL_BlitSurface(s, NULL, SCREEN, NULL);
>                 SDL_Flip(SCREEN);
>         }
>         SDL_FreeSurface(s);
> }
>
> it works fine, though a bit slow on higher resolutions. so i ask you if you could gimme a few sugestions on how to improve this code to make it
> faster or anything else that goes into your geek-minds.
> thanks a lot,
> c ya,
> --skinncode





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