From 450019dc218f94146a30549994976e9d804b1c05 Mon Sep 17 00:00:00 2001
From: Artur Wieczorek <artwik@wp.pl>
Date: Wed, 30 Dec 2015 17:41:17 +0100
Subject: [PATCH] Ensure COM is still active when Direct2D renderer is in use

Some internal D2D operations need active COM library so ensure it is properly
initialized and released in wxDirect2DModule.

Closes #17308.
---
 src/msw/graphicsd2d.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/msw/graphicsd2d.cpp b/src/msw/graphicsd2d.cpp
index 7addd85e64..340d15d44c 100644
--- a/src/msw/graphicsd2d.cpp
+++ b/src/msw/graphicsd2d.cpp
@@ -3759,7 +3759,10 @@ public:
 
     virtual bool OnInit() wxOVERRIDE
     {
-        return true;
+        HRESULT hr = ::CoInitializeEx(NULL, COINIT_APARTMENTTHREADED);
+        // RPC_E_CHANGED_MODE is not considered as an error
+        // - see remarks for wxOleInitialize().
+        return SUCCEEDED(hr) || hr == RPC_E_CHANGED_MODE;
     }
 
     virtual void OnExit() wxOVERRIDE
@@ -3781,6 +3784,8 @@ public:
             delete gs_D2DRenderer;
             gs_D2DRenderer = NULL;
         }
+
+        ::CoUninitialize();
     }
 
 private: