glGetString(3G)glGetString(3G)NAMEglGetString - return a string describing the current GL connection
const GLubyte * glGetString(
GLenum name );
Specifies a symbolic constant, one of GL_VENDOR, GL_RENDERER, GL_VER‐
SION, or GL_EXTENSIONS.
DESCRIPTIONglGetString() 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 ren‐
derer. 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 space-separated list of
supported extensions to GL.
Because the GL does not include queries for the performance character‐
istics of an implementation, some applications are written to recognize
known platforms and modify their GL usage based on known performance
characteristics of these platforms. 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.
Some applications want to make use of features that are not part of the
standard GL. These features may be implemented as extensions to the
standard GL. The GL_EXTENSIONS string is a space-separated list of sup‐
ported GL extensions. (Extension names never contain a space charac‐
The GL_VERSION string begins with a version number. The version number
uses one of these forms:
Vendor-specific information may follow the version number. Its 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 or extensions.
glGetString() always returns a compatible version number or list of
extensions. The release number always describes the server.
GL_INVALID_ENUM is generated if name is not an accepted value.
GL_INVALID_OPERATION is generated if glGetString() is executed between
the execution of glBegin() and the corresponding execution of glEnd().