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Core in version 4.5
Core since version 1.0

glGetString: return a string describing the current GL connection

Function Definition

 const GLubyte* glGetString(GLenum name​);
 const GLubyte* glGetStringi(GLenum name​, GLuint index​);
Specifies a symbolic constant, one of GL_VENDOR, GL_RENDERER, GL_VERSION, or GL_SHADING_LANGUAGE_VERSION. Additionally, glGetStringi accepts the GL_EXTENSIONS token.
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:


Returns the company responsible for this GL implementation. This name does not change from release to release.


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.


Returns a version or release number.


Returns a version or release number for the shading language.

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.

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

For glGetStringi only, returns the extension string supported by the implementation at index​. The index index​ is on the range [0 to glGetIntegerv(GL_NUM_EXTENSIONS) - 1].
Returns one of the versions of GLSL supported by this implementation. index​ is on the range [0 to glGetIntegerv(GL_NUM_SHADING_LANGUAGE_VERSIONS) - 1].

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​.


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