4 void print(SDL_Surface *dst,int x,int y,unsigned char *text);
5 Uint32 getpixel(SDL_Surface *surface, int x, int y);
6 void putpixel(SDL_Surface *surface, int x, int y, Uint32 pixel);
7 void setpixel(SDL_Surface *screen, int x, int y, Uint8 r, Uint8 g, Uint8 b);