tdf#100151: Dispose of window if DX device creation failed

Before, if the device lacked Direct3D capabilities, VclPtr
handling became compromised, and caused a crash. This was
particularly a problem in virtualized/remote desktop
connections in Windows.

Now mpWindow instance is disposed of right away if DX
device creation fails.

Change-Id: I639340380affdb31a93ce6dccd8df33a0a466df6
Reviewed-on: https://gerrit.libreoffice.org/33413
Reviewed-by: Michael Meeks <michael.meeks@collabora.com>
Tested-by: Jenkins <ci@libreoffice.org>
(cherry picked from commit bb50474225f80b8aeea49f14ad66173462026a41)
Reviewed-on: https://gerrit.libreoffice.org/33477
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

1 files changed, 11 insertions, 8 deletions

diff --git a/canvas/source/directx/dx_9rm.cxx b/canvas/source/directx/dx_9rm.cxx
index 1f58f2bd8349..4b41d302b54b 100644
--- a/canvas/source/directx/dx_9rm.cxx
+++ b/canvas/source/directx/dx_9rm.cxx
@@ -583,6 +583,14 @@ namespace dxcanvas
             // TODO(P2): get rid of those fine-grained locking
             ::osl::MutexGuard aGuard( maMutex );
 
+            // TODO(F2): since we would like to share precious hardware
+            // resources, the direct3d9 object should be global. each new
+            // request for a canvas should only create a new swapchain.
+            mpDirect3D9 = COMReference<IDirect3D9>(
+                Direct3DCreate9(D3D_SDK_VERSION));
+            if(!mpDirect3D9.is())
+                return false;
+
             maVertexCache.reserve( 1024 );
 
             mpWindow.disposeAndClear();
@@ -619,17 +627,12 @@ namespace dxcanvas
             // let the child window cover the same size as the parent window.
             mpWindow->setPosSizePixel(0,0,maSize.getX(),maSize.getY());
 
-            // TODO(F2): since we would like to share precious hardware
-            // resources, the direct3d9 object should be global. each new
-            // request for a canvas should only create a new swapchain.
-            mpDirect3D9 = COMReference<IDirect3D9>(
-                Direct3DCreate9(D3D_SDK_VERSION));
-            if(!mpDirect3D9.is())
-                return false;
-
             // create a device from the direct3d9 object.
             if(!(createDevice()))
+            {
+                mpWindow.disposeAndClear();
                 return false;
+            }
 
             mpWindow->Show();