#include <cstdlib>
#include <iostream>
#include <SDL/sdl.h>



SDL_Surface *Screen;
SDL_Event event;

void SetPixel(SDL_Surface *pSurface,long x,long y,char r,char g,char b)
{
    Uint32 Color=SDL_MapRGB(pSurface->format,(Uint8)r,(Uint8)g,(Uint8)b);
    char *Pos=(char *)pSurface->pixels;
    Pos+=(pSurface->pitch*y);
    Pos+=(pSurface->format->BytesPerPixel*x);
    memcpy(Pos,&Color,pSurface->format->BytesPerPixel);
}
    

int main(int argc, char *argv[])
{
    if (SDL_Init(SDL_INIT_VIDEO)==-1)
    {
       return 0;
    }
    Screen=SDL_SetVideoMode(1024,768,32, SDL_HWSURFACE | SDL_DOUBLEBUF | SDL_FULLSCREEN );
    if(NULL==Screen)
    {
        return 0;
    }
    for (int i=0;i<Screen->w;i++)
    {
        for (int j=0;j<Screen->h;j++)
        {
            SetPixel(Screen,i,j,i+j*2,i*2+j,i*2+j*2);
        }
    }
    
    SDL_PollEvent(&event);    
    while (event.type!=SDL_QUIT)
    {
        if (event.type==SDL_KEYDOWN)
        {
            exit(0);
        }
        SDL_Flip(Screen);
        SDL_PollEvent(&event);
    }
    return 0;
                                     
}