inline void SDLFillRectangle(SDL_Surface *, int, int, int, int, unsigned int);
inline void SDLDrawSimpleLine(SDL_Surface *, int, int, int, int, unsigned int);
inline void SDLFillRectangle(SDL_Surface *, int, int, int, int, unsigned int);
inline void SDLDrawSimpleLine(SDL_Surface *, int, int, int, int, unsigned int);