Add Vulkan (DXVK) support

[ghost]

Vulkan (DXVK) support was added in the Left 4 Dead 2 update for the GNU/Linux native port. I also suggest doing it in Garry's Mod. Why is this needed in Garry's Mod? Because ToGL reduces the DirectX version to 9, which causes the graphics to be lowered and some graphic effects disappear (also, ToGL itself does not render some effects). It can also get rid of some graphical glitches (or, on the contrary, add them).

[git4rker]

So empty here...

[Tiagoquix]

This was also done to Portal 1, Portal 2, Half-Life 2 and Team Fortress 2. It's Garry's Mod turn!

[Tiagoquix]

@robotboy655 Hi there. Is there any news regarding this issue?

The implementation of DXVK could fix a lot of bugs that only exist with OpenGL (ToGL translation layer), and also improve performance.

Thanks in advance.

[razorzinho]

+1 on this. Please add it, Linux Port is a big joke currently to be honest, and to play 64bit version, we need to do a lot of tinkering outside the game because Chromium stuff is not downloaded automatically (not to mention the fonts being all italic and hardcoded for Linux instead of using better ones when available). That's also a good opportunity to fix this and wipe out the need of using https://github.com/solsticegamestudios/GModCEFCodecFix. These are actually the only big issues with the port as far as I know, and I'm pretty sure these are not complicated to implement/fix.

Update: for the CEFCodedFix, it is already a Pull Request for your official HTML repo, and it has been there awaiting approval since 2021

[Tiagoquix]

Btw, duplicate of Facepunch/garrysmod-requests#1905