OpenGL® Registry

The OpenGL Registry Has Been Moved!

As of 2017-01-21, the canonical OpenGL Registry has been MOVED to https://www.khronos.org/registry/OpenGL/ .

The new registry location is backed by a github repository at https://github.com/KhronosGroup/OpenGL-Registry .

There will be no further updates to the public Subversion area. We are in the process of setting up redirects so that deep links under opengl.org/registry will continue to work, and the old website will remain active until those redirects are established; but everyone should begin using the new registry on khronos.org as soon as possible.

Please file issues with the new registry on the github repository.

OpenGL® Registry

The OpenGL Registry contains specifications, header files, and related documentation for OpenGL and related APIs including GLU, GLX, and WGL. In addition to the core API specifications, many extensions to these APIs have been defined by vendors, groups of vendors, and the ARB. The Registry also contains specifications and header files for all registered extensions, written as modifications to the appropriate core API specifications.

The Registry also includes naming conventions, guidelines for creating new extensions and writing suitable extension specifications, and other documentation related to these APIs.

Table of Contents

Current OpenGL API, Shading Language, GLX, and Related Specifications and Reference Pages
Core API and Extension Header Files
IP Disclosures Potentially Affecting OpenGL Implementations
Adding to the Registry and Requesting Enumerant Allocations
XML API Registry of Reserved Enumerants and Functions
Extension Specifications
- ARB Extensions by number
- Vendor and EXT Extensions by number
Older Material for Reference
- Older OpenGL and GLX Specifications and Reference Pages
- OpenGL Application Binary Interface for Linux

Current OpenGL API, OpenGL Shading Language and GLX Specifications and Reference Pages

Current Specifications (OpenGL 4.5)
OpenGL 4.5 API Specification (updated October 24, 2016)
OpenGL Shading Language 4.50 Specification (updated April 14, 2016)
- GLSL Specification
- GLSL Specification with changes marked
OpenGL 4.5 API and Shading Language Reference Pages
OpenGL 4.5 Quick Reference Card
OpenGL X Window System Binding (GLX 1.4) Specification
GLX 1.4 Specification (December 16, 2005)

API and 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 supplied with the OS / graphics drivers. Additional header files are provided here, including:

<GL/glext.h> - OpenGL 1.2 and above compatibility profile and extension interfaces.
<GL/glcorearb.h> - OpenGL core profile and ARB extension interfaces, as described in appendix G.2 of the OpenGL 4.3 Specification. Does not include interfaces found only in the compatibility profile.
<GL/glxext.h> - GLX 1.3 and above API and GLX extension interfaces.
<GL/wglext.h> - WGL extension interfaces.

These headers define interfaces including enumerants, prototypes, and for platforms supporting dynamic runtime extension queries, such as Linux and Microsoft Windows, function pointer typedefs. Please report problems using the public Khronos.org Bugzilla.

Adding to the Registry and Requesting Enumerant Allocations

If you want to add an extension specification to the Registry, correct an existing specification, request allocation of enumerants and other controlled resources in the OpenGL / GLX / WGL namespaces, or otherwise change the Registry, please create a Bugzilla account on the public Khronos.org Bugzilla, and submit your request there against Product "OpenGL", Component "Registry". You can use this Bugzilla link, which fills in many fields for you.

Please review the documents linked below, especially How to Create Extensions and Enumerant Allocation Policies, before making your request.

XML API Registry of Reserved Enumerants and Functions

The API Registry is a set of XML documents defining the APIs and enumerants used in OpenGL, OpenGL ES, GLX, and WGL, as well as enumerant ranges reserved to vendors but not used yet. There are also scripts for loading the XML and processing it into header files. All documents in the registry are available from the Khronos Subversion server using anonymous public access. Start with the README .

The old ".spec" files will no longer be maintained, but are still available from Subversion. See the README.txt for a description of the contents.

Older OpenGL and GLX Specifications and Reference Pages

OpenGL Application Binary Interface for Linux

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

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).

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