glXImportContextEXT  -  import  another process's indirect
       rendering context.



C SPECIFICATION

       GLXContext glXImportContextEXT( Display *dpy,
                                       GLXContextID contextID )



PARAMETERS

       dpy        Specifies the connection to the X server.


       contextID  Specifies a GLX rendering context.



DESCRIPTION

       glXImportContextEXT creates a GLXContext given the XID  of
       an  existing  GLXContext.   It  may  be  used  in place of
       glXCreateContext, to share another process's indirect ren-
       dering context.

       Only  the  server-side  context  information can be shared
       between X clients; client-side state, such as pixel  stor-
       age  modes,  cannot  be  shared. Thus, glXImportContextEXT
       must allocate memory  to  store  client-side  information.
       This memory is freed by calling glXFreeContextEXT.

       This  call  does not create a new XID.  It merely makes an
       existing object available to the importing client (Display
       *).   Like  any XID, it goes away when the creating client
       drops its connection or the ID is explicitly deleted. Note
       that  this is when the XID goes away. The object goes away
       when the XID goes away AND the context is not  current  to
       any thread.

       If  contextID refers to a direct rendering context then no
       error is generated but glXImportContextEXT returns NULL.

       glXImportContextEXT  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 argument
       GLX_EXTENSIONS, extension EXT_import_context is supported.



ERRORS

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



SEE ALSO