Indicates whether the window system supports the OpenGL extension (GLX, WGL, etc.).
Indicates whether the window system supports the OpenGL extension (GLX, WGL, etc.).
Returns the address of the OpenGL, GLU, or GLX function.
Determines whether a given OpenGL extension is supported.
Returns the version numbers of the OpenGL extension to the window system.
Returns the version numbers of the OpenGL extension to the window system.