3 files changed, 18 insertions, 0 deletions
diff --git a/src/3rdparty/angle/src/common/platform.h b/src/3rdparty/angle/src/common/platform.h
index e16e7ac0c2..cedc6f2f22 100644
--- a/src/3rdparty/angle/src/common/platform.h
+++ b/src/3rdparty/angle/src/common/platform.h
@@ -56,6 +56,7 @@
 
 #   if defined(ANGLE_ENABLE_D3D11)
 #       include <d3d10_1.h>
+#       include <d3d10.h>
 #       include <d3d11.h>
 #       include <dxgi.h>
 #       include <dxgi1_2.h>
diff --git a/src/3rdparty/angle/src/libGLESv2/renderer/d3d/d3d11/Renderer11.cpp b/src/3rdparty/angle/src/libGLESv2/renderer/d3d/d3d11/Renderer11.cpp
index 17a13f97d6..651b065ca2 100644
--- a/src/3rdparty/angle/src/libGLESv2/renderer/d3d/d3d11/Renderer11.cpp
+++ b/src/3rdparty/angle/src/libGLESv2/renderer/d3d/d3d11/Renderer11.cpp
@@ -305,6 +305,19 @@ EGLint Renderer11::initialize()
         mMaxSupportedSamples = std::max(mMaxSupportedSamples, support.maxSupportedSamples);
     }
 
+#if !defined(ANGLE_PLATFORM_WINRT)
+    static wchar_t *qt_d3dcreate_multihreaded_var = _wgetenv(L"QT_D3DCREATE_MULTITHREADED");
+    if (qt_d3dcreate_multihreaded_var && wcsstr(qt_d3dcreate_multihreaded_var, L"1"))
+    {
+        ID3D10Multithread *multithread;
+        result = mDevice->QueryInterface(IID_PPV_ARGS(&multithread));
+        ASSERT(SUCCEEDED(result));
+        result = multithread->SetMultithreadProtected(true);
+        ASSERT(SUCCEEDED(result));
+        multithread->Release();
+    }
+#endif
+
     initializeDevice();
 
     return EGL_SUCCESS;
diff --git a/src/3rdparty/angle/src/libGLESv2/renderer/d3d/d3d9/Renderer9.cpp b/src/3rdparty/angle/src/libGLESv2/renderer/d3d/d3d9/Renderer9.cpp
index 491c27a6ab..2c8a79f964 100644
--- a/src/3rdparty/angle/src/libGLESv2/renderer/d3d/d3d9/Renderer9.cpp
+++ b/src/3rdparty/angle/src/libGLESv2/renderer/d3d/d3d9/Renderer9.cpp
@@ -319,6 +319,10 @@ EGLint Renderer9::initialize()
     D3DPRESENT_PARAMETERS presentParameters = getDefaultPresentParameters();
     DWORD behaviorFlags = D3DCREATE_FPU_PRESERVE | D3DCREATE_NOWINDOWCHANGES;
 
+    static wchar_t *qt_d3dcreate_multihreaded_var = _wgetenv(L"QT_D3DCREATE_MULTITHREADED");
+    if (qt_d3dcreate_multihreaded_var && wcsstr(qt_d3dcreate_multihreaded_var, L"1"))
+        behaviorFlags |= D3DCREATE_MULTITHREADED;
+
     {
         TRACE_EVENT0("gpu", "D3d9_CreateDevice");
         result = mD3d9->CreateDevice(mAdapter, mDeviceType, mDeviceWindow, behaviorFlags | D3DCREATE_HARDWARE_VERTEXPROCESSING | D3DCREATE_PUREDEVICE, &presentParameters, &mDevice);