Bug 648484, part 5: Create our D3D10 device so as to allow cross-process resource sharing. r=Bas

gfx/thebes/gfxWindowsPlatform.cpp

@@ -79,6 +79,7 @@ using namespace mozilla::gfx;
 #include "gfxD2DSurface.h"
 
 #include <d3d10_1.h>
+#include <dxgi.h>
 
 #include "mozilla/gfx/2D.h"
 
@@ -152,6 +153,11 @@ typedef HRESULT (WINAPI*D3D10CreateDevice1Func)(
   UINT SDKVersion,
   ID3D10Device1 **ppDevice
 );
+
+typedef HRESULT(WINAPI*CreateDXGIFactory1Func)(
+  REFIID riid,
+  void **ppFactory
+);
 #endif
 
 static __inline void
@@ -318,10 +324,34 @@ gfxWindowsPlatform::VerifyD2DDevice(PRBool aAttemptForce)
     nsRefPtr<ID3D10Device1> device;
 
     if (createD3DDevice) {
+        HMODULE dxgiModule = LoadLibraryA("dxgi.dll");
+        CreateDXGIFactory1Func createDXGIFactory1 = (CreateDXGIFactory1Func)
+            GetProcAddress(dxgiModule, "CreateDXGIFactory1");
+
+        // Try to use a DXGI 1.1 adapter in order to share resources
+        // across processes.
+        nsRefPtr<IDXGIAdapter1> adapter1;
+        if (createDXGIFactory1) {
+            nsRefPtr<IDXGIFactory1> factory1;
+            HRESULT hr = createDXGIFactory1(__uuidof(IDXGIFactory1),
+                                            getter_AddRefs(factory1));
+    
+            nsRefPtr<IDXGIAdapter1> adapter1; 
+            hr = factory1->EnumAdapters1(0, getter_AddRefs(adapter1));
+
+            if (SUCCEEDED(hr) && adapter1) {
+                hr = adapter1->CheckInterfaceSupport(__uuidof(ID3D10Device1),
+                                                     nsnull);
+                if (FAILED(hr)) {
+                    adapter1 = nsnull;
+                }
+            }
+        }
+
         // We try 10.0 first even though we prefer 10.1, since we want to
         // fail as fast as possible if 10.x isn't supported.
         HRESULT hr = createD3DDevice(
-            NULL, 
+            adapter1, 
             D3D10_DRIVER_TYPE_HARDWARE,
             NULL,
             D3D10_CREATE_DEVICE_BGRA_SUPPORT |
@@ -337,7 +367,7 @@ gfxWindowsPlatform::VerifyD2DDevice(PRBool aAttemptForce)
             // clever.
             nsRefPtr<ID3D10Device1> device1;
             hr = createD3DDevice(
-                NULL, 
+                adapter1, 
                 D3D10_DRIVER_TYPE_HARDWARE,
                 NULL,
                 D3D10_CREATE_DEVICE_BGRA_SUPPORT |