Merge branch 'par_fixes' into 'master'

Par fixes

- Increased buffer size in send/recv command (needed for sending python files, see ngsolve merge request)
- Fixed mpi-parallel visualization
- Added warning if using direct rendering + mpi (which probably breaks in most cases)

See merge request !10

libsrc/general/mpi_interface.cpp

@@ -16,17 +16,17 @@ namespace netgen
   
   void MyMPI_SendCmd (const char * cmd)
   {
-    char buf[100];
+    char buf[10000];
     strcpy (buf, cmd);
     // MPI_Bcast (&buf, 100, MPI_CHAR, 0, MPI_COMM_WORLD);
 
     for (int dest = 1; dest < ntasks; dest++)
-      MPI_Bsend( &buf, 100, MPI_CHAR, dest, MPI_TAG_CMD, MPI_COMM_WORLD);
+      MPI_Send( &buf, 10000, MPI_CHAR, dest, MPI_TAG_CMD, MPI_COMM_WORLD);
   }
 
   string MyMPI_RecvCmd ()
   {
-    char buf[100];
+    char buf[10000];
     // MPI_Bcast (&buf, 100, MPI_CHAR, 0, MPI_COMM_WORLD);
 
     // VT_OFF();
@@ -44,7 +44,7 @@ namespace netgen
     while (!flag);
     // VT_ON();
 
-    MPI_Recv( &buf, 100, MPI_CHAR, 0, MPI_TAG_CMD, MPI_COMM_WORLD, &status);
+    MPI_Recv( &buf, 10000, MPI_CHAR, 0, MPI_TAG_CMD, MPI_COMM_WORLD, &status);
     
     return string(buf);
   }

libsrc/visualization/mvdraw.cpp

@@ -776,13 +776,16 @@ namespace netgen
 	  {
 	    string displname;
 	    
-	    // Display * dpy = glXGetCurrentDisplay();
+	    Display * dpy = glXGetCurrentDisplay();
 	    GLXDrawable drawable = glXGetCurrentDrawable();
 	    GLXContext ctx = glXGetCurrentContext();
 	    GLXContextID xid = glXGetContextIDEXT (ctx);
 	    
 	    displname = XDisplayName (0);
 
+	    if( glXIsDirect ( dpy, ctx ) )
+	      cout << "WARNING: direct rendering enabled; this might break mpi-parallel netgen (especially if X-forwarding is used! (to disable, change -indirect to true in ng/drawing.tcl)" << endl;
+	      
 	    /*
 	    cout << "Init Parallel GL" << endl;
 	    cout << "DisplayName = " << displname << endl;

ng/parallelfunc.cpp

@@ -166,16 +166,18 @@ void ParallelRun()
 		" , h = ", XDisplayHeight (display, 0));
 	      */
 
+	      /*
 		Window win;
 		int wx, wy;
 		unsigned int ww, wh, bw, depth;
-	      // cout << "got drawable: " << curDrawable << endl;
+		cout << "got drawable: " << curDrawable << ", contextid: " << contextid <<  endl;
 		
+		cout << "get geometriy..." << endl;
 		XGetGeometry(display, curDrawable, &win,
 		&wx, &wy, &ww, &wh,
 		&bw, &depth);
+		cout << "have!" << endl;
 	      
-	      /*
 		cout << "P" << id << ": window-props:  x = " << wx << ", y = " << wy 
 		<< ", w = " << ww << ", h = " << wh << ", depth = " << depth << endl;
 	      */
@@ -183,6 +185,8 @@ void ParallelRun()
 #define VISUAL
 #ifdef VISUAL
 
+#ifdef VISINFO_OLD
+	      //this does not seem to work anymore (but might still be with togl1.7?)
 	      // make a new GLXContext
 	      // first, generate a visual (copied from togl)
 		
@@ -224,9 +228,12 @@ void ParallelRun()
 
 		  visinfo = glXChooseVisual(display, 0, 
 					    attrib_list);
+		  cout << "have vis?" << endl;
+
 		  if (visinfo) {
 		    /* found a GLX visual! */
 		    // cout << "found VISINFO !!!" << endl;
+		    cout << "found VISINFO !!!" << endl;
 
 		    /*
 		    int hi = 0;
@@ -242,10 +249,26 @@ void ParallelRun()
 	      if (!visinfo)
 		cerr << "no VISINFO found" << endl;
 
+#else
+	      //get all possible confs
+	      int nconfs;
+	      auto cptr = glXGetFBConfigs (display,0, &nconfs);
+	      Array<int> conf_ids(nconfs);
+	      for(int k=0;k<nconfs;k++)
+		glXGetFBConfigAttrib(display, cptr[k], GLX_FBCONFIG_ID, &(conf_ids[k]));
+	      
+	      //get drawable->FBConfig->visual
+	      unsigned int d_fbc_id;
+	      glXQueryDrawable( display, curDrawable, GLX_FBCONFIG_ID, &d_fbc_id); 
+	      GLXFBConfig d_fbc;
+	      for(int k=0;k<nconfs;k++)
+		if(d_fbc_id==conf_ids[k])
+		  d_fbc = cptr[k];
+	      visinfo = glXGetVisualFromFBConfig(display,d_fbc);
+#endif
+
 	      // context = glXCreateContext( display, visinfo, 0, /* curContext, */ False );
 	      context = glXCreateContext( display, visinfo, glXImportContextEXT ( display, contextid ), False);
-	      // cout << "context = " << context << endl;
-		
 	      glXMakeCurrent (display, curDrawable, context);
 
 
@@ -255,11 +278,9 @@ void ParallelRun()
 
 	      context = glXImportContextEXT ( display, contextid );
 
-
 	      PrintMessage (1, "GLX-contextid = " , contextid,
 			    " imported context ", context);
 
-
 	      glXMakeCurrent (display, curDrawable, context);
 #endif
 
@@ -283,7 +304,6 @@ void ParallelRun()
 	      vsmesh.BuildFilledList (false);
 	    }
 
-
 	  if (redraw_cmd == "solsurfellist")
 	    {
 	      vssolution.DrawSurfaceElements();