Force a repaint after DXGI device resets. (bug 1188019, r=bas)

gfx/thebes/gfxPlatform.h

@@ -605,6 +605,12 @@ public:
 
     virtual void FlushContentDrawing() {}
 
+    // If a device reset has occurred, update the necessary platform backend
+    // bits.
+    virtual bool UpdateForDeviceReset() {
+      return false;
+    }
+
     /**
      * Helper method, creates a draw target for a specific Azure backend.
      * Used by CreateOffscreenDrawTarget.

gfx/thebes/gfxWindowsPlatform.cpp

@@ -1192,6 +1192,30 @@ gfxWindowsPlatform::DidRenderingDeviceReset(DeviceResetReason* aResetReason)
   return false;
 }
 
+BOOL CALLBACK
+InvalidateWindowForDeviceReset(HWND aWnd, LPARAM aMsg)
+{
+    RedrawWindow(aWnd, nullptr, nullptr,
+                 RDW_INVALIDATE|RDW_INTERNALPAINT|RDW_FRAME);
+    return TRUE;
+}
+
+bool
+gfxWindowsPlatform::UpdateForDeviceReset()
+{
+  if (!DidRenderingDeviceReset()) {
+    return false;
+  }
+
+  // Trigger an ::OnPaint for each window.
+  ::EnumThreadWindows(GetCurrentThreadId(),
+                      InvalidateWindowForDeviceReset,
+                      0);
+
+  gfxCriticalNote << "Detected rendering device reset on refresh";
+  return true;
+}
+
 void
 gfxWindowsPlatform::GetPlatformCMSOutputProfile(void* &mem, size_t &mem_size)
 {

gfx/thebes/gfxWindowsPlatform.h

@@ -213,7 +213,8 @@ public:
      */
     virtual bool IsFontFormatSupported(nsIURI *aFontURI, uint32_t aFormatFlags) override;
 
-    virtual bool DidRenderingDeviceReset(DeviceResetReason* aResetReason = nullptr) override;
+    bool DidRenderingDeviceReset(DeviceResetReason* aResetReason = nullptr) override;
+    bool UpdateForDeviceReset() override;
 
     mozilla::gfx::BackendType GetContentBackendFor(mozilla::layers::LayersBackend aLayers) override;
 

layout/base/nsRefreshDriver.cpp

@@ -1644,6 +1644,8 @@ nsRefreshDriver::Tick(int64_t aNowEpoch, TimeStamp aNowTime)
   AutoRestore<TimeStamp> restoreTickStart(mTickStart);
   mTickStart = TimeStamp::Now();
 
+  gfxPlatform::GetPlatform()->UpdateForDeviceReset();
+
   /*
    * The timer holds a reference to |this| while calling |Notify|.
    * However, implementations of |WillRefresh| are permitted to destroy