ive done a backbuffer function but it dosnt work..... heres the code

#include <SDL/SDL.h>
SDL_Surface *screen;
SDL_Surface *bbuf;
SDL_Surface *image;
void backbuffer(SDL_Surface *image, int x, int y)
{
  SDL_Rect dest;

  dest.x = x;
  dest.y = y;
  dest.w = image->w;
  dest.h = image->h;
  SDL_BlitSurface(image, &dest, bbuf, &dest);
  SDL_BlitSurface(bbuf, &dest, screen, &dest);
}

i dont get an error when i compile... thanx [Edited by - Washu on August 31, 2004 2:50:40 PM]

is your back buffer a valid surface?

what are you trying to do with this?

check out the tutorials on my site, they cover stuff like this.

The first blit is unneccessary because you are using same SDL_Rect as the size. You could just blit the image on screen directly. Remember to use SDL_UpdateRect to make the image actually show in windowed mode.

Well, if you actually need the back buffer then it's neccessary, but you need TWO routines: first which draws graphics on back buffer and another one which will update the graphics on screen surface and then updates it with SDL_UpdateRect.

You can also set up a double buffer and use SDL_Flip to swap the drawing buffer.