NAME

- return a string describing the current GL connection

C SPECIFICATION

const GLubyte* ggllGGeettSSttrriinngg( GLenum _n_a_m_e )

PARAMETERS

_n_a_m_e
Specifies a symbolic constant, one of GGLL__VVEENNDDOORR, GGLL__RREENNDDEERREERR, GGLL__VVEERRSSIIOONN, or GGLL__EEXXTTEENNSSIIOONNSS.

DESCRIPTION

ggllGGeettSSttrriinngg returns a pointer to a static string describing some aspect of the current GL connection. _n_a_m_e can be one of the following:
GGLL__VVEENNDDOORR
Returns the company responsible for this GL implementation. This name does not change from release to release.
GGLL__RREENNDDEERREERR
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.
GGLL__VVEERRSSIIOONN
Returns a version or release number.
GGLL__EEXXTTEENNSSIIOONNSS
Returns a space-separated list of supported extensions to GL.

Because the GL does not include queries for the performance characteristics 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 GGLL__VVEENNDDOORR and GGLL__RREENNDDEERREERR 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 GGLL__EEXXTTEENNSSIIOONNSS string is a space-separated list of supported GL extensions. (Extension names never contain a space character.)

The GGLL__VVEERRSSIIOONN string begins with a version number. The version number uses one of these forms:

_m_a_j_o_r___n_u_m_b_e_r_._m_i_n_o_r___n_u_m_b_e_r
_m_a_j_o_r___n_u_m_b_e_r_._m_i_n_o_r___n_u_m_b_e_r_._r_e_l_e_a_s_e___n_u_m_b_e_r

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.

NOTES

If an error is generated, ggllGGeettSSttrriinngg returns 0.

The client and server may support different versions or extensions. ggllGGeettSSttrriinngg always returns a compatible version number or list of extensions. The release number always describes the server.

ERRORS

GGLL__IINNVVAALLIIDD__EENNUUMM is generated if _n_a_m_e is not an accepted value.

GGLL__IINNVVAALLIIDD__OOPPEERRAATTIIOONN is generated if ggllGGeettSSttrriinngg is executed between the execution of ggllBBeeggiinn and the corresponding execution of ggllEEnndd.