GLXContext ctx,
                            int attribut )

PARAMETERS
       dpy       Specifies the connection to the X server.

       ctx       Specifies a GLX rendering context.

       attribut  Specifies  that a context parameter should be retrieved.  Must
                 be one of GLX_FBCONFIG_ID, GLX_RENDER_TYPE, or GLX_SCREEN.

       _param4   Contains the return value for attribut.

DESCRIPTION
       glXQueryContext sets _param4 to the value of attribut  with  respect  to
       ctx.  attribut may be one of the following:

       GLX_FBCONFIG_ID       Returns the XID of the GLXFBConfig associated with
                             ctx.

       GLX_RENDER_TYPE       Returns the rendering type supported by ctx.

       GLX_SCREEN            Returns the screen number associated with ctx.

       Success is returned unless attribut is not a valid  GLX  context  attri‐
       bute, in which case GLX_BAD_ATTRIBUTE is returned.

       This call may cause a round-trip to the server.

NOTES
       glXQueryContext is available only if the GLX version is 1.3 or greater.

       If  the  GLX  version is 1.1 or 1.0, the GL version must be 1.0.  If the
       GLX version is 1.2, then the GL version must be 1.1.  If the GLX version
       is 1.3, then the GL version must be 1.2.

ERRORS
       GLXBadContext is generated if ctx does not refer to a valid context.

SEE ALSO
       glXCreateNewContext,        glXGetCurrentContext,       glXQueryVersion,
       glXQueryExtensionsString

                                                            GLXQUERYCONTEXT(3G)