gistfile1.h

#include <SDL/SDL.h>
SDL_Surface* s; SDL_Event e;
void render()
{
    unsigned char* pix = screen->pixels;
    SDL_LockSurface(s);
    for(int y=0;y<600;++y){
        int c=y*800;
        for(int x=0;x<800;++x){
            int i= (col+x)*4;
            pix[col  ]=a;
            pix[col+1]=r;
            pix[col+2]=g;
            pix[col+3]=b;
        }
    }
    SDL_UnlockSurface(s);
    SDL_Flip(s);
}
int main()
{
    SDL_Init(SDL_INIT_VIDEO);
    s=SDL_SetVideoMode(800,600,32,SDL_HWSURFACE|SDL_DOUBLEBUF);
    int r=1;
    while(r){
        while(SDL_PollEvent(&e))
        {
            if(e.type==SDL_QUIT || (e.type==SDL_KEYDOWN&&e.key.keysym.sym==SDLK_ESCAPE))
                r=0;
        }
        render();
    }
    SDL_Quit();
    exit(0);
}