SVGAlib is an open-source low-level graphics library which runs on Linux and FreeBSD and allows programs to change video mode and display full-screen graphics. Some popular games like ''Quake'' and ''Doom'' have been ported to use SVGAlib. ==History== The library was popular in mid-1990s. Toward 2000, many applications that used it migrated to X11 and SDL, which itself can make use of SVGAlib as a video driver. A sample of SVGAlib code is shown below.