d4r: official NVIDIA DLSS on AMD GPUs under Linux and Proton

packaging/d4r.ini

@@ -0,0 +1,53 @@
+; d4r settings for this game. This file lives in the game's d4r folder and applies to this game only.
+; "auto" means the built-in default. Any setting can also be overridden with the environment variable
+; that config/d4r.ini.default in the source repository lists for it, e.g. in the game's launch options.
+
+[DLSS]
+; Which DLSS network runs:
+;   K     DLSS 4 transformer (default)
+;   E     DLSS 3 CNN: a little faster, softer image
+;   M     DLSS 4.5 transformer: best image, much slower on RDNA3
+;   game  whatever the game (or OptiScaler's preset override) asks for
+; Frame rates measured on an RX 7700 XT at 2560x1440, Quality mode: see D4R_README.txt.
+Model = K
+; NVIDIA's library marks the image "DLSS SDK - DO NOT DISTRIBUTE" in this setup; d4r turns that off.
+; true shows it.
+ShowWatermark = false
+
+[Latency]
+; 0: every frame shows its own DLSS result, as with a native upscaler (needs the d3d12.dll that came
+;    with d4r next to the game).
+; 1-3: allow results up to that many frames old. Slightly more fps, more input latency.
+FrameAge = 0
+
+[Kernels]
+; Hand-written RDNA3 kernels for the DLSS 4 and 4.5 networks (d4r\kernels). Each one is used only
+; when your DLSS library's code for that kernel matches the code it was written for; otherwise that
+; kernel is compiled from NVIDIA's code instead, which is slower but still correct.
+NativeKernels = on
+
+[Interop]
+; These keep DLSS's inputs and output in video memory and move the waits between the game and DLSS
+; onto the GPU. Leave them on unless you are chasing a problem.
+VramInterop = true
+GpuWait = true
+LinearInputs = true
+ElideNgxSync = true
+; Lets DLSS's last kernel write straight into the game's output buffer (DLSS 4 / K only). It takes
+; effect only while d4r's own output kernel runs, which it does when the DLSS library matches.
+DirectOutput = auto
+
+[Paths]
+; Linux paths.
+; ROCm installation (default /opt/rocm)
+RocmDir = auto
+; Cache for the compiled DLSS kernels (default ~/.cache/d4r). The first launch fills it.
+CacheDir = auto
+
+[Debug]
+; d4r's log is d4r\d4r_nvngx.log, rewritten at every launch.
+; Profile = true adds one line of timings per frame.
+Profile = false
+
+[Env]
+; Extra environment variables for d4r, NAME = value.