Upstream: D3D8 fixes that should be applied to D3D9 or DXSO too

[AlpyneDreams]

It's possible some of the fixes in d8vk are accounting for weird behavior in d9vk / dxso but not D3D9. There may be a couple of these as D3D9 also supports vs1.1 and ps1.4.

See #43 for one possible example. D3D9 docs state that replicate swizzle should be used but DXSO seems to allow arbitrary swizzles, which may either be fixing games or breaking them.

[AlpyneDreams]

#68 - AL16, R16, L16, AR16

[AlpyneDreams]

There's a possibility that equivalent functionality to f974535 (EndScene on Reset) might want to be added to d3d9 if that's how Microsoft d3d9 behaves.

Edit: Done with #204

[WinterSnowfall]

There's a possibility that equivalent functionality to f974535 (EndScene on Reset) might want to be added to d3d9 if that's how Microsoft d3d9 behaves.

The trace included with doitsujin#2184 seems to suggest that is the case, albeit I expect most d3d9 games to behave properly and not rely on it.

[AlpyneDreams]

• b2b89ee - [d3d9] Initialize m_mapFlags to 0
• 4a7c627 - [dxso] Implement bem instruction

[AlpyneDreams]

Since d8vk has been upstreamed and this issue is only tracking #43 and #68 now I can close it and just deal with those on their own.