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Return a string describing the current GL connection.

C Specification[edit]

const GLubyte * glGetString( GLenum name );
const GLubyte * glGetStringi( GLenum name, GLuint index );


name - Specifies a symbolic constant, one of GL_VENDOR , GL_RENDERER , GL_VERSION , or GL_SHADING_LANGUAGE_VERSION . Additionally, glGetStringi accepts the GL_EXTENSIONS token.
index - For glGetStringi , specifies the index of the string to return.


 glGetString returns a pointer to a static string describing some aspect of the current GL connection. name can be one of the following:

GL_VENDOR  - Returns the company responsible for this GL implementation. This name does not change from release to release.
GL_RENDERER  - Returns the name of the renderer. This name is typically specific to a particular configuration of a hardware platform. It does not change from release to release.
GL_VERSION  - Returns a version or release number.
GL_SHADING_LANGUAGE_VERSION  - Returns a version or release number for the shading language.

 glGetStringi returns a pointer to a static string indexed by index . name can be one of the following:

GL_EXTENSIONS  - For glGetStringi only, returns the extension string supported by the implementation at index .

Strings GL_VENDOR and GL_RENDERER together uniquely specify a platform. They do not change from release to release and should be used by platform-recognition algorithms.

The GL_VERSION and GL_SHADING_LANGUAGE_VERSION strings begin with a version number. The version number uses one of these forms:


Vendor-specific information may follow the version number. Its format depends on the implementation, but a space always separates the version number and the vendor-specific information.

All strings are null-terminated.


If an error is generated, glGetString returns 0.

The client and server may support different versions. glGetString always returns a compatible version number. The release number always describes the server.


 GL_INVALID_ENUM is generated if name is not an accepted value.

 GL_INVALID_VALUE is generated by glGetStringi if index is outside the valid range for indexed state name .

Version Support[edit]

 glGetString  2.0+
 glGetStringi  3.0+

See Also[edit]


Copyright© 1991-2006 Silicon Graphics, Inc. Copyright© 2010-2014 Khronos Group. This document is licensed under the SGI Free Software B License. For details, see