I do not fully understand what you mean.
This is a way to draw a picture.
void DrawImg(SDL_surface *screen, int x, int y)
{
// destination rect
SDL_Rect DRect;
DRect.x = x;
DRect.y = y;
// blit the image to the screen
SDL_BlitSurface(image,NULL,buffer,&DRect);
return;
}...