sdl_gfx: SDL_gfx Library.
sdl_gfx: 
sdl_gfx: SDL graphics drawing  primitives  and other support functions. The
sdl_gfx: SDL_gfx  library  evolved  out of the SDL_gfxPrimitives code which
sdl_gfx: provided basic drawing routines such as lines, circles or polygons
sdl_gfx: and SDL_rotozoom which  implemented a interpolating rotozoomer for
sdl_gfx: SDL surfaces.
sdl_gfx: 
sdl_gfx:           http://www.ferzkopp.net/Software/SDL_gfx-2.0/
sdl_gfx:                          WWW.SLACKY.IT
sdl_gfx: PackaGer Gohanz.