<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML3.2 EN"> <HTML> <HEAD> <META NAME="GENERATOR" CONTENT="DOCTEXT"> <TITLE>MPE_Open_graphics</TITLE> </HEAD> <BODY BGCOLOR="FFFFFF"> <A NAME="MPE_Open_graphics"><H1>MPE_Open_graphics</H1></A> (collectively) opens an X Windows display <H2>Synopsis</H2> <PRE> #include "mpe.h" int MPE_Open_graphics( handle, comm, display, x, y, w, h, is_collective ) MPE_XGraph *handle; MPI_Comm comm; char display[MPI_MAX_PROCESSOR_NAME+4]; int x, y; int w, h; int is_collective; </PRE> <H2>Input Parameters</H2> <DL> <DT><B>comm </B><DD>Communicator of participating processes <P> <DT><B>display </B><DD>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. <P> <DT><B>x,y </B><DD>position of the window. If '(-1,-1)', then the user should be asked to position the window (this is a window manager issue). <DT><B>w,h </B><DD>width and height of the window, in pixels. <DT><B>is_collective </B><DD>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 implemented. </DL> <P> <H2>Output Parameter</H2> <DL><DT><B>handle </B> <DD> Graphics handle to be given to other MPE graphics routines. </DL> <P> <H2>Notes</H2> 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). <P> <P> <H2>Notes For Fortran Interface </H2> 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. <P> All MPI and MPE objects, MPI_Comm, MPE_XGraph and MPE_Color, are of type INTEGER in Fortran. <P> <H2>Additional Notes for Fortran Interface </H2> 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 ignored. <P><B>Location:</B>../src/graphics/src/mpe_graphics.c<P> </BODY></HTML>
