OpenGL® Extension Registry

Many OpenGL extensions, as well as extensions to related APIs like GLU, GLX, and WGL, have been defined by vendors and groups of vendors. The extension registry is maintained by Khronos and contains specifications for all known extensions, written as modifications to the appropriate specification documents. The registry also defines naming conventions, guidelines for creating new extensions and writing suitable extension specifications, and other related documentation.

OpenGL Application Binary Interface for Linux

The current version of the OpenGL Application Binary Interface for Linux is also available.

Extension Header Files

Because extensions vary from platform to platform and driver to driver, OpenGL developers can't expect interfaces for all extensions to be defined in the standard gl.h, glx.h, and wgl.h header files. Additional header files - glext.h, glxext.h, and wglext.h - are provided here.

These headers define interfaces (enumerants, prototypes, and for platforms supporting dynamic runtime extension queries, such as Linux and Microsoft Windows, function pointer typedefs) for all registered extensions.

Enumerant and Function Registry

The canonical database from which enumerant ranges are reserved is called enum.spec. It is in a custom text file format. A derived variant, enumext.spec, contains all the individual enumerant values assigned to token defined in extensions. The related file gl.spec defines all the individual function entry points for core OpenGL and extensions.

(Yes, these databases should be moved to a modern XML-based format. Patience.)

Miscellaneous Documents

ARB Extensions by number

Vendor and EXT Extensions by number

Other Extensions

These extensions have not yet been assigned numbers, are still under development, or were abandoned (but are kept in the extension registry for reference purposes).