Compatibility Rework with DLSS handling #16
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This is the compatiblity rework 2 with added patches for DLSS. It adds dxvk-nvapi and nvidia nvngx.dll handling, as well as a field for extra WINEDLLOVERRIDES. This will allow users to pass in extra windows dlls for reshade and other things. Most notably, the DLSS quality mod and FSR2 replacement mod both require passing a few extra dll overrides. Formatting is checked via the WineSettings.WineDLLOverrideIsValid() function. The "Enable DLSS" option will not appear if the nvngx.dll file cannot be found.
The launcher will search for nvngx.dll so the user does not have to do anything extra. It will search, in order, ~/.xlcore/compatibilitytool/nvidia, /lib64, /lib, /usr/lib64, and /usr/lib. As soon as it finds one, it will stop searching. This does work with flatpaks as well. The nvngx.dll and _nvngx.dll will be symlinked into the FFXIV game folder. They can't be placed in the prefix because the game will hang at a black window.
DLSS requires a newer version of wine. 9.0 and later should work, as well as most wine-ge builds >= 8 and my valvebe builds>= 8. It also requres DXVK >= 2.0. And a compatible nvidia gpu, of course.
This can be merged as is, or merged later over the top of PR goatcorp#1366 (Compatibility rework 2). This requires the "Compatibility Rework with DLSS handling" PR in XIVLauncher.Core to be merged.