[d3d9] Only force AF on textures with mipmaps.

[CME42]

This fixes some visual artifacts (#1666) on nvidia with UE3 when
anisotropic filtering is enabled through d3d9.samplerAnisotropy.

[aufkrawall]

I can confirm it fixes the issue. Thanks for that pleasant surprise! :)

[aufkrawall]

Unfortunately, this greatly degrades AF quality in Oblivion:

[CME42]

Thanks for testing, I'll close this PR for now, can you please upload an apitrace of the spot in the screenshot?

[aufkrawall]

Sure, here we go:
https://drive.google.com/file/d/1LiXU8MXiekfvLNP1ogC28wMjswShmcto/view?usp=sharing

[CME42]

Thanks, I've force-pushed a change in the aniso branch, but I'm not sure what the performance implications are and what else i may have missed, perhaps there is a better way to do this.

[aufkrawall]

Indeed Oblivion looks normal now (afaict from a quick glimpse) and Lili is still fixed. I'll test and benchmark some more and keep you updated.

[aufkrawall]

I've additionally tested the following games:
Borderlands 2 (btw. showed the same issue as Lili without the PR)
Tropico 4
Serious Sam 2
Mirror's Edge
Left 4 Dead 2

AF (whether forced via DXVK or not) works fine in all of these games with the updated PR applied, both quality and performance wise.

[aufkrawall]

@CME42 Perhaps the same should be done for D3D11? The Forest (Unity Engine) seems to show this issue too.
Edit: doitsujin mentioned elsewhere that this can't be done in the same way for D3D11.

[aufkrawall]

This PR doesn't seem to cause any harm with forced AF on Polaris with radv/amdvlk.

[ViNi-Arco]

Hi CME42..
Applying your PR introduces shimmering on GTAIII and GTAVC textures

see below👇

Click here

With this PR:
https://img.tpx.cz/uploads/IIITextureBrokenFilter.png
With DXVK Stock:
https://img.tpx.cz/uploads/IIITextureWorkFilter.png

With this PR:
https://img.tpx.cz/uploads/TextureBrokenFilterVC.png
With DXVK Stock:
https://img.tpx.cz/uploads/TextureWorkFilterVC.png

[Joshua-Ashton]

I'm really not a fan of adding resource tracking for an app profile, sorry.