fix: black window on screen capture when content protection is enabled (electron#31340)

deermichel · Micha Hanselmann · t57ser · commit b1cd70f4df41 · 2021-10-29T12:25:30.000+02:00
Co-authored-by: Micha Hanselmann &lt;mhanselmann@microsoft.com&gt;
diff --git a/shell/browser/native_window_views.cc b/shell/browser/native_window_views.cc
@@ -1105,8 +1105,17 @@ void NativeWindowViews::SetIgnoreMouseEvents(bool ignore, bool forward) {
 
 void NativeWindowViews::SetContentProtection(bool enable) {
 #if defined(OS_WIN)
+  HWND hwnd = GetAcceleratedWidget();
+  if (!layered_) {
+    // Workaround to prevent black window on screen capture after hiding and
+    // showing the BrowserWindow.
+    LONG ex_style = ::GetWindowLong(hwnd, GWL_EXSTYLE);
+    ex_style |= WS_EX_LAYERED;
+    ::SetWindowLong(hwnd, GWL_EXSTYLE, ex_style);
+    layered_ = true;
+  }
   DWORD affinity = enable ? WDA_EXCLUDEFROMCAPTURE : WDA_NONE;
-  ::SetWindowDisplayAffinity(GetAcceleratedWidget(), affinity);
+  ::SetWindowDisplayAffinity(hwnd, affinity);
 #endif
 }
 
