From 158b7642c53843ed954fa667ff23b8746f95f8eb Mon Sep 17 00:00:00 2001
From: Andrew Knight <andrew.knight@digia.com>
Date: Tue, 22 Apr 2014 09:13:57 +0300
Subject: [PATCH] ANGLE WinRT: Call Trim() when application suspends

This is required by Windows Store Apps to pass certification.

Task-number: QTBUG-38481
Change-Id: I6dc00431ee5f6c7d4c64111ccc38f46483d3b9a8
---
 .../src/libGLESv2/renderer/d3d11/Renderer11.cpp    | 47 ++++++++++++++++++++++
 .../src/libGLESv2/renderer/d3d11/Renderer11.h      | 15 +++++++
 2 files changed, 62 insertions(+)

diff --git a/src/3rdparty/angle/src/libGLESv2/renderer/d3d11/Renderer11.cpp b/src/3rdparty/angle/src/libGLESv2/renderer/d3d11/Renderer11.cpp
index 2de477b..e70727c 100644
--- a/src/3rdparty/angle/src/libGLESv2/renderer/d3d11/Renderer11.cpp
+++ b/src/3rdparty/angle/src/libGLESv2/renderer/d3d11/Renderer11.cpp
@@ -40,6 +40,13 @@
 
 #include "libEGL/Display.h"
 
+#if defined(ANGLE_OS_WINRT) && !defined(ANGLE_OS_WINPHONE)
+#  include <dxgi1_3.h>
+#  include <wrl.h>
+#  include <windows.applicationmodel.core.h>
+typedef ABI::Windows::Foundation::IEventHandler<ABI::Windows::ApplicationModel::SuspendingEventArgs *> SuspendEventHandler;
+#endif
+
 #ifdef _DEBUG
 // this flag enables suppressing some spurious warnings that pop up in certain WebGL samples
 // and conformance tests. to enable all warnings, remove this define.
@@ -426,9 +433,49 @@ EGLint Renderer11::initialize()
         }
     }
 
+#if defined(ANGLE_OS_WINRT) && !defined(ANGLE_OS_WINPHONE)
+    // Monitor when the application suspends so that Trim() can be called
+    Microsoft::WRL::ComPtr<ABI::Windows::ApplicationModel::Core::ICoreApplication> application;
+    result = RoGetActivationFactory(Microsoft::WRL::Wrappers::HString::MakeReference(RuntimeClass_Windows_ApplicationModel_Core_CoreApplication).Get(),
+                                    IID_PPV_ARGS(&application));
+    if (FAILED(result))
+    {
+        ERR("Error obtaining CoreApplication: 0x%08X", result);
+        return EGL_NOT_INITIALIZED;
+    }
+
+    EventRegistrationToken cookie;
+    result = application->add_Suspending(Microsoft::WRL::Callback<SuspendEventHandler>(this, &Renderer11::onSuspend).Get(), &cookie);
+    if (FAILED(result))
+    {
+        ERR("Error setting suspend callback: 0x%08X", result);
+        return EGL_NOT_INITIALIZED;
+    }
+#endif
+
     return EGL_SUCCESS;
 }
 
+#if defined(ANGLE_OS_WINRT) && !defined(ANGLE_OS_WINPHONE)
+HRESULT Renderer11::onSuspend(IInspectable *, ABI::Windows::ApplicationModel::ISuspendingEventArgs *)
+{
+    if (!mDevice)
+        return S_OK;
+
+    Microsoft::WRL::ComPtr<IDXGIDevice3> dxgiDevice;
+    HRESULT result = mDevice->QueryInterface(IID_PPV_ARGS(&dxgiDevice));
+    if (FAILED(result))
+    {
+        ERR("Error obtaining DXGIDevice3 on suspend: 0x%08X", result);
+        return S_OK;
+    }
+
+    dxgiDevice->Trim();
+
+    return S_OK;
+}
+#endif
+
 // do any one-time device initialization
 // NOTE: this is also needed after a device lost/reset
 // to reset the scene status and ensure the default states are reset.
diff --git a/src/3rdparty/angle/src/libGLESv2/renderer/d3d11/Renderer11.h b/src/3rdparty/angle/src/libGLESv2/renderer/d3d11/Renderer11.h
index a8a722c..773fc26 100644
--- a/src/3rdparty/angle/src/libGLESv2/renderer/d3d11/Renderer11.h
+++ b/src/3rdparty/angle/src/libGLESv2/renderer/d3d11/Renderer11.h
@@ -18,6 +18,17 @@
 #include "libGLESv2/renderer/d3d11/InputLayoutCache.h"
 #include "libGLESv2/renderer/RenderTarget.h"
 
+#if defined(ANGLE_OS_WINRT) && !defined(ANGLE_OS_WINPHONE)
+struct IInspectable;
+namespace ABI {
+    namespace Windows {
+        namespace ApplicationModel {
+            struct ISuspendingEventArgs;
+        }
+    }
+}
+#endif
+
 namespace gl
 {
 class Renderbuffer;
@@ -202,6 +213,10 @@ class Renderer11 : public Renderer
                               RenderTarget *drawRenderTarget, bool wholeBufferCopy);
     ID3D11Texture2D *resolveMultisampledTexture(ID3D11Texture2D *source, unsigned int subresource);
 
+#if defined(ANGLE_OS_WINRT) && !defined(ANGLE_OS_WINPHONE)
+    HRESULT onSuspend(IInspectable *, ABI::Windows::ApplicationModel::ISuspendingEventArgs *);
+#endif
+
     HMODULE mD3d11Module;
     HMODULE mDxgiModule;
 
-- 
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