SVGALib

SVGAlib, styled as "Linux SuperVGA Graphics Library", is a legacy open-source low-level graphics library for accessing SuperVGA hardware on PC-compatible systems running on Linux, with later ports to AmigaOS and FreeBSD. SVGAlib allowed programs to change video mode to display full-screen graphics, without the use of a windowing system. Alongside X11 and the General Graphics Interface, it was one of the earliest libraries allowing graphical video games on Linux.
Although still available online, SVGAlib has seen no code releases since July 2006 and would be considered superseded and discontinued.

History

The first version of SVGAlib was based on version 1.2 of another library, VGAlib by Tommy Frandsen. SVGAlib added support for many more SuperVGA chipsets and video modes.
Several games like Ambrosia Software's Maelstrom by Sam Lantinga, the first-person games Freaks! and Space Plumber using the QDGDF library, and most famously id Software's Doom and Quake were ported to use SVGAlib from other operating systems, as was Doom porter Dave Taylor's Abuse.
Wolfenstein 3D was also ported following its source code being released in 1995, as well as the id produced Heretic, Hexen and Hexen II after 1999, and Descent and Descent II by Parallax Software after 1998. Certain source ports for Doom, Quake, and Abuse maintained support for SVGAlib. The library is also supported by the MAME/MESS emulator.
First party Linux games that have supported it include Alizarin Tetris, Bdash, Fleuch, Hatman, Intelligent FRAC, Koules, LinCity, Linberto, Quadra, Repton, SABRE, Thrust, Zarch, and Zblast, among others.
SVGAlib was popular in the mid to late 1990s. A reference book, Linux Graphics Programming with SVGAlib, was authored by Jay Link in 2000. Around the turn of the millennium, many applications that used it migrated to X11 and SDL, which could make use of SVGAlib as a video driver. This was in part due to the risks of privilege escalation due to SVGAlib requiring applications to be run as the 'root' user.