DragonFly On-Line Manual Pages
MPE_Open_graphics(4) MPE MPE_Open_graphics(4)
MPE_Open_graphics - (collectively) opens an X Windows display
int MPE_Open_graphics( handle, comm, display, x, y, w, h, is_collective )
int x, y;
int w, h;
comm - Communicator of participating processes
- Name of X window display. If NULL, display will be taken from
the local DISPLAY variable on each process. If the local DISPLAY
is undefined, the DISPLAY variable of the process with rank 0 in
'comm' will be used. If that is either undefined then the value
of display is ``hostname``:0, or if it starts with w ":xy", then
the value of display is ``hostname``:xy.
x,y - position of the window. If '(-1,-1)', then the user should be
asked to position the window (this is a window manager issue).
w,h - width and height of the window, in pixels.
- true if the graphics operations are collective; this allows
the MPE graphics operations to make fewer connections to the
display. If false, then all processes in the communicator comm
will open the display; this could exceed the number of
connections that your X window server allows. Not yet
handle - Graphics handle to be given to other MPE graphics routines.
This is a collective routine. All processes in the given communicator
must call it, and it has the same semantics as 'MPI_Barrier' (that is,
other collective operations can not cross this routine).
NOTES FOR FORTRAN INTERFACE
The Fortran interface to this routine is different from its C
counterpart and it has an additional argument, ierr, at the end of the
argument list, i.e. the returned function value (the error code) in C
interface is returned as the additional argument in Fortran interface.
The Fortran interface is invoked with the CALL statement.
All MPI and MPE objects, MPI_Comm, MPE_XGraph and MPE_Color, are of
type INTEGER in Fortran.
ADDITIONAL NOTES FOR FORTRAN INTERFACE
If Fortran 'display' argument is an empty string, "", display will be
taken from the DISPLAY variable on the process with rank 0 in 'comm'.
The trailing blanks in Fortran CHARACTER string argument will be