don't use priviledged calls in wxDFB to allow concurrent use of the display by >1 wxDFB apps

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@43489 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/dfb/wrapdfb.cpp

@@ -98,8 +98,10 @@ void wxIDirectFB::CleanUp()
 
 wxIDirectFBSurfacePtr wxIDirectFB::GetPrimarySurface()
 {
-    wxIDirectFBDisplayLayerPtr layer(GetDisplayLayer());
-    return layer ? layer->GetSurface() : NULL;
+    DFBSurfaceDescription desc;
+    desc.flags = DSDESC_CAPS;
+    desc.caps = DSCAPS_PRIMARY;
+    return CreateSurface(&desc);
 }
 
 //-----------------------------------------------------------------------------
@@ -192,3 +194,26 @@ bool wxIDirectFBSurface::FlipToFront(const DFBRegion *region)
     // drawings:
     return Flip(region, DSFLIP_BLIT);
 }
+
+//-----------------------------------------------------------------------------
+// wxIDirectFBDisplayLayer
+//-----------------------------------------------------------------------------
+
+wxVideoMode wxIDirectFBDisplayLayer::GetVideoMode()
+{
+    DFBDisplayLayerConfig cfg;
+    if ( !GetConfiguration(&cfg) )
+        return wxVideoMode(); // invalid
+
+    if ( !((cfg.flags & DLCONF_WIDTH) &&
+           (cfg.flags & DLCONF_HEIGHT) &&
+           (cfg.flags & DLCONF_PIXELFORMAT)) )
+        return wxVideoMode(); // invalid
+
+    return wxVideoMode
+           (
+             cfg.width,
+             cfg.height,
+             DFB_BITS_PER_PIXEL(cfg.pixelformat)
+           );
+}