SDL
From Agar
Simple DirectMedia Layer (SDL) is a cross-platform multimedia library which provides a unified interface to graphics hardware, sound hardware and input devices across different operating systems. It is thanks to SDL that Agar can run on such a wide array of platforms.
If compiled with SDL support (--with-sdl), Agar can use SDL as a graphics backend, via the sdlfb and sdlgl drivers. Where hardware acceleration is available, sdlgl is strongly recommended over sdlfb.
