1 files changed, 103 insertions, 0 deletions
diff --git a/gfx/angle/checkout/src/libANGLE/renderer/d3d/d3d11/Trim11.cpp b/gfx/angle/checkout/src/libANGLE/renderer/d3d/d3d11/Trim11.cpp
new file mode 100644
index 0000000000..ac6d9a5220
--- /dev/null
+++ b/gfx/angle/checkout/src/libANGLE/renderer/d3d/d3d11/Trim11.cpp
@@ -0,0 +1,103 @@
+//
+// Copyright 2014 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// Trim11.cpp: Trim support utility class.
+
+#include "libANGLE/renderer/d3d/d3d11/Trim11.h"
+#include "libANGLE/renderer/d3d/d3d11/Renderer11.h"
+#include "libANGLE/renderer/d3d/d3d11/renderer11_utils.h"
+
+#if defined(ANGLE_ENABLE_WINDOWS_UWP)
+#    include <windows.applicationmodel.core.h>
+#    include <wrl.h>
+#    include <wrl/wrappers/corewrappers.h>
+using namespace Microsoft::WRL;
+using namespace Microsoft::WRL::Wrappers;
+using namespace ABI::Windows::ApplicationModel;
+using namespace ABI::Windows::ApplicationModel::Core;
+using namespace ABI::Windows::Foundation;
+using namespace ABI::Windows::Foundation::Collections;
+#endif
+
+namespace rx
+{
+
+Trim11::Trim11(rx::Renderer11 *renderer) : mRenderer(renderer)
+{
+    bool result = true;
+    result      = registerForRendererTrimRequest();
+    ASSERT(result);
+}
+
+Trim11::~Trim11()
+{
+    unregisterForRendererTrimRequest();
+}
+
+void Trim11::trim()
+{
+    if (!mRenderer)
+    {
+        return;
+    }
+
+#if defined(ANGLE_ENABLE_WINDOWS_UWP)
+    ID3D11Device *device      = mRenderer->getDevice();
+    IDXGIDevice3 *dxgiDevice3 = d3d11::DynamicCastComObject<IDXGIDevice3>(device);
+    if (dxgiDevice3)
+    {
+        dxgiDevice3->Trim();
+    }
+    SafeRelease(dxgiDevice3);
+#endif
+}
+
+bool Trim11::registerForRendererTrimRequest()
+{
+#if defined(ANGLE_ENABLE_WINDOWS_UWP)
+    ICoreApplication *coreApplication = nullptr;
+    HRESULT result                    = GetActivationFactory(
+        HStringReference(RuntimeClass_Windows_ApplicationModel_Core_CoreApplication).Get(),
+        &coreApplication);
+    if (SUCCEEDED(result))
+    {
+        auto suspendHandler = Callback<IEventHandler<SuspendingEventArgs *>>(
+            [this](IInspectable *, ISuspendingEventArgs *) -> HRESULT {
+                trim();
+                return S_OK;
+            });
+        result =
+            coreApplication->add_Suspending(suspendHandler.Get(), &mApplicationSuspendedEventToken);
+    }
+    SafeRelease(coreApplication);
+
+    if (FAILED(result))
+    {
+        return false;
+    }
+#endif
+    return true;
+}
+
+void Trim11::unregisterForRendererTrimRequest()
+{
+#if defined(ANGLE_ENABLE_WINDOWS_UWP)
+    if (mApplicationSuspendedEventToken.value != 0)
+    {
+        ICoreApplication *coreApplication = nullptr;
+        if (SUCCEEDED(GetActivationFactory(
+                HStringReference(RuntimeClass_Windows_ApplicationModel_Core_CoreApplication).Get(),
+                &coreApplication)))
+        {
+            coreApplication->remove_Suspending(mApplicationSuspendedEventToken);
+        }
+        mApplicationSuspendedEventToken.value = 0;
+        SafeRelease(coreApplication);
+    }
+#endif
+}
+
+}  // namespace rx