[Windows] Gray Layer Issue

[ghost]

In some games (especially using DirectX 9) the Overlay has an additional gray layer. As an example I use the gbe_fork emulator using your library.

As you can see, games using DirectX 9 have this gray layer. There is no such problem in any other game using DirectX 11.

[Nemirtingas]

It's a behavior I already encountered, unfortunatly, I can't find a way to consistently reproduce this kind of issue. It often happens in DX9, but not all DX9 games has this issue. Also should be noted that Valve, in their games, use their own flavor of DirectX.