Steve Lhomme authored Aug 25, 2023 and Jean-Baptiste Kempf committed Aug 27, 2023

Either D3D11/D3D9 is usable and the structures are there, or they are not.
We don't support old mingw-w64 versions without these headers.

* D3D11 is not enabled if libavcodec/d3d11.h is not usable
* DXVA2 is not enabled if libavcodec/dxva2.h is not usable
* direct3d9_filters is enabled if d3d9.h is usable (ie not UWP builds)