_param1  Specifies a GLX rendering context.

DESCRIPTION
       glXGetContextIDEXT returns the XID associated with a GLXContext.

       No round trip is forced to the server; unlike most X calls that return a
       value, glXGetContextIDEXT does not flush any pending events.

       glXGetContextIDEXT is part of the EXT_import_context extension, not part
       of  the  core  GLX command set. If GLX_EXT_import_context is included in
       the string returned by glXQueryExtensionsString, when called with  argu‐
       ment GLX_EXTENSIONS, extension EXT_import_context is supported.

ERRORS
       GLXBadContext is generated if _param1 does not refer to a valid context.

SEE ALSO
       glXCreateContext, glXQueryVersion, glXQueryExtensionsString

                                                         GLXGETCONTEXTIDEXT(3G)