New moonlight patch for mouse-accel

hardware-specific/trackball.nix

@@ -7,6 +7,14 @@
     }
   ];
 
+  nixpkgs.overlays = [
+    (final: prev: {
+      moonlight-qt = prev.moonlight-qt.overrideAttrs (old: {
+        patches = (old.patches or [ ]) ++ [ ../misc/mouse-accel.patch ];
+      });
+    })
+  ];
+
   hardware.logitech.wireless = {
     enable = true;
     enableGraphical = true;

misc/mouse-accel.patch

@@ -0,0 +1,15 @@
+diff --git a/app/streaming/input/input.cpp b/app/streaming/input/input.cpp
+index 95db06e0..d1d34fd5 100644
+--- a/app/streaming/input/input.cpp
++++ b/app/streaming/input/input.cpp
+@@ -39,6 +39,10 @@ SdlInputHandler::SdlInputHandler(StreamingPreferences& prefs, int streamWidth, i
+         m_CaptureSystemKeysMode = StreamingPreferences::CSK_ALWAYS;
+     }
+ 
++    // This is used to always grab the OS-modified input for the mouse
++    // This is because I am using OS-level functionality for mouse acceleration
++    SDL_SetHint(SDL_HINT_MOUSE_RELATIVE_MODE_WARP, "1");
++
+     // Allow gamepad input when the app doesn't have focus if requested
+     SDL_SetHint(SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS, prefs.backgroundGamepad ? "1" : "0");
+