Add patch for broken SteamVR focus handling (#62)

* Add patch for broken SteamVR focus handling
Yellow-Dog-Man/Resonite-Issues#2337

* Add note about singleton

* Check for Enabled condition

Author: goaaats

CommunityBugFixCollection/SteamVrFocusResolutionScale.cs

@@ -0,0 +1,31 @@
+using HarmonyLib;
+using MonkeyLoader.Resonite;
+using System.Collections.Generic;
+
+namespace CommunityBugFixCollection
+{
+    [HarmonyPatchCategory(nameof(SteamVrFocusResolutionScale))]
+    [HarmonyPatch("Valve.VR.SteamVR_Render", "OnInputFocus")]
+    internal sealed class SteamVrFocusResolutionScale : ResoniteBugFixMonkey<SteamVrFocusResolutionScale>
+    {
+        public override IEnumerable<string> Authors => Contributors.Goat;
+        
+        // SteamVR_Render is treated as a singleton in SteamVR and initialized once from SteamVRDriver through SteamVR.Initialize() 
+        private static bool _lastInputFocus = false;
+        
+        public static bool Prefix(bool hasFocus)
+        {
+            // Work around some broken logic in SteamVR focus handling
+            // https://github.com/Yellow-Dog-Man/Resonite-Issues/issues/2337#issuecomment-3025681468
+            // https://github.com/ValveSoftware/steamvr_unity_plugin/blob/056c82369d78f253af8cefcae9b289efd69bd960/Assets/SteamVR/Scripts/SteamVR_Render.cs#L237-L262
+            if (Enabled && !hasFocus && !_lastInputFocus)
+            {
+                Logger.Trace(() => "Dropping redundant OnInputFocus call");
+                return false;
+            }
+            
+            _lastInputFocus = hasFocus;
+            return true;
+        }
+    }
+}

README.md

@@ -54,6 +54,7 @@ just disable them in the settings in the meantime.
 * FlipAtUser component does not respect view position (https://github.com/Yellow-Dog-Man/Resonite-Issues/issues/1335)
 * ColorX From HexCode (ProtoFlux node) defaults to Linear profile (https://github.com/Yellow-Dog-Man/Resonite-Issues/issues/1404)
 * ProtoFlux value casts from byte to other values converting incorrectly (mono / graphical client only) (https://github.com/Yellow-Dog-Man/Resonite-Issues/issues/2257)
+* Resolution scale may get stuck at 0.5 when opening and closing the SteamVR dashboard while the game is hitching (https://github.com/Yellow-Dog-Man/Resonite-Issues/issues/2337)
 * `ValueMod<Decimal>` node crashes the game when B input is set to zero or disconnected. (https://github.com/Yellow-Dog-Man/Resonite-Issues/issues/2746)
 * Grid World grid being off-center (https://github.com/Yellow-Dog-Man/Resonite-Issues/issues/2754)
 * Animators updating all associated fields every frame while enabled but not playing (https://github.com/Yellow-Dog-Man/Resonite-Issues/issues/3480)