It will work on Win8+ and will not be used on Win7 (unless forced).
Also log the feature level as hexadecimal, it's easier to read.
This way you cannot use D3D11VA with a D3D9 vout by default.
CPU buffers and copy in the staging texture from there.
The texture to display is copied to the staging texture just before rendering.
For CPU formats mapped to GPU each texture of the array may be different.
We can't display it but we still need a proper texture format to display.
it's an old hack we don't need with picture_sys_t.
Shared by all code using the opaque format.
window):  Hann, flat top, Blackman-Harris, and Kaiser.
It is not yet functionnal.