misc: chore: Pass rainbow color by reference in the event instead of passing around a packed int.

src/Ryujinx.Common/Helpers/RefEvent.cs

@@ -0,0 +1,58 @@
+using Gommon;
+using System.Collections.Generic;
+using System.Threading;
+
+namespace Ryujinx.Common.Helper
+{
+    public class RefEvent<T>
+    {
+        public delegate void Handler(ref T arg);
+        
+        private readonly Lock _subLock = new();
+        private readonly List<Handler> _subscriptions = [];
+    
+        public bool HasSubscribers
+        {
+            get
+            {
+                lock (_subLock)
+                    return _subscriptions.Count != 0;
+            }
+        }
+
+        public IReadOnlyList<Handler> Subscriptions
+        {
+            get
+            {
+                lock (_subLock)
+                    return _subscriptions;
+            }
+        }
+
+        public void Add(Handler subscriber)
+        {
+            Guard.Require(subscriber, nameof(subscriber));
+            lock (_subLock)
+                _subscriptions.Add(subscriber);
+        }
+
+        public void Remove(Handler subscriber)
+        {
+            Guard.Require(subscriber, nameof(subscriber));
+            lock (_subLock)
+                _subscriptions.Remove(subscriber);
+        }
+
+        public void Clear()
+        {
+            lock (_subLock)
+                _subscriptions.Clear();
+        }
+
+        public void Call(ref T arg)
+        {
+            foreach (Handler subscription in Subscriptions)
+                subscription(ref arg);
+        }
+    }
+}

src/Ryujinx.Common/Utilities/Rainbow.cs

@@ -1,4 +1,5 @@
 using Gommon;
+using Ryujinx.Common.Helper;
 using System;
 using System.Drawing;
 using System.Threading;
@@ -55,7 +56,7 @@ namespace Ryujinx.Common.Utilities
             {
                 _color = HsbToRgb((_color.GetHue() + Speed) / 360);
             
-                _updatedHandler.Call(_color.ToArgb());
+                _updatedHandler.Call(ref _color);
             }
         }
 
@@ -67,13 +68,13 @@ namespace Ryujinx.Common.Utilities
                 _color = Color.Blue;
         }
 
-        public static event Action<int> Updated
+        public static event RefEvent<Color>.Handler Updated
         {
             add => _updatedHandler.Add(value);
             remove => _updatedHandler.Remove(value);
         }
 
-        private static readonly Event<int> _updatedHandler = new();
+        private static readonly RefEvent<Color> _updatedHandler = new();
 
         private static Color HsbToRgb(float hue, float saturation = 1, float brightness = 1)
         {

src/Ryujinx.Input.SDL2/SDL2Gamepad.cs

@@ -2,8 +2,6 @@ using Ryujinx.Common.Configuration.Hid;
 using Ryujinx.Common.Configuration.Hid.Controller;
 using Ryujinx.Common.Logging;
 using Ryujinx.Common.Utilities;
-using Ryujinx.HLE.HOS.Services.Hid;
-using SDL2;
 using System;
 using System.Collections.Generic;
 using System.Numerics;
@@ -12,7 +10,7 @@ using static SDL2.SDL;
 
 namespace Ryujinx.Input.SDL2
 {
-    class SDL2Gamepad : IGamepad
+    public class SDL2Gamepad : IGamepad
     {
         private bool HasConfiguration => _configuration != null;
 
@@ -113,7 +111,7 @@ namespace Ryujinx.Input.SDL2
             byte blue = packedRgb > 0 ? (byte)(packedRgb % 256) : (byte)0;
             
             if (SDL_GameControllerSetLED(_gamepadHandle, red, green, blue) != 0)
-                Logger.Error?.Print(LogClass.Hid, "LED is not supported on this game controller.");
+                Logger.Error?.Print(LogClass.Hid, "LED setting failed; probably in the middle of disconnecting.");
         }
 
         private GamepadFeaturesFlag GetFeaturesFlag()

src/Ryujinx/Assets/Styles/CheckboxMenuItemStyle.axaml

@@ -1,13 +0,0 @@
-<Styles xmlns="https://github.com/avaloniaui"
-        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
-    <Style Selector="MenuItem.withCheckbox Viewbox#PART_IconPresenter">
-        <Setter Property="MaxHeight" Value="36" />
-        <Setter Property="MinHeight" Value="36" />
-        <Setter Property="MaxWidth" Value="36" />
-        <Setter Property="MinWidth" Value="36" />
-    </Style>
-    <Style Selector="MenuItem.withCheckbox ContentPresenter#PART_HeaderPresenter">
-        <Setter Property="Padding" Value="-10,0,0,0" />
-    </Style>
-</Styles>
-

src/Ryujinx/Assets/Styles/Styles.xaml

@@ -218,6 +218,15 @@
         <Setter Property="BorderBrush"
                 Value="{DynamicResource ThemeControlBorderColor}" />
     </Style>
+    <Style Selector="MenuItem.withCheckbox Viewbox#PART_IconPresenter">
+        <Setter Property="MaxHeight" Value="36" />
+        <Setter Property="MinHeight" Value="36" />
+        <Setter Property="MaxWidth" Value="36" />
+        <Setter Property="MinWidth" Value="36" />
+    </Style>
+    <Style Selector="MenuItem.withCheckbox ContentPresenter#PART_HeaderPresenter">
+        <Setter Property="Padding" Value="-10,0,0,0" />
+    </Style>
     <Style Selector="TabItem > ScrollViewer">
         <Setter Property="Background"
                 Value="{DynamicResource ThemeBackgroundColor}" />

src/Ryujinx/Ryujinx.csproj

@@ -123,13 +123,11 @@
       <Generator>MSBuild:Compile</Generator>
     </AvaloniaResource>
     <AvaloniaResource Include="Assets\Styles\Styles.xaml" />
-    <AvaloniaResource Include="Assets\Styles\CheckboxMenuItemStyle.axaml" />
   </ItemGroup>
 
   <ItemGroup>
     <None Remove="Assets\locales.json" />
     <None Remove="Assets\Styles\Themes.xaml" />
-    <None Remove="Assets\Styles\CheckboxMenuItemStyle.xaml" />
     <None Remove="Assets\Icons\Controller_JoyConLeft.svg" />
     <None Remove="Assets\Icons\Controller_JoyConPair.svg" />
     <None Remove="Assets\Icons\Controller_JoyConRight.svg" />
@@ -151,7 +149,6 @@
     </EmbeddedResource>
     <EmbeddedResource Include="Assets\locales.json" />
     <EmbeddedResource Include="Assets\Styles\Styles.xaml" />
-    <EmbeddedResource Include="Assets\Styles\CheckboxMenuItemStyle.axaml" />
     <EmbeddedResource Include="Assets\Icons\Controller_JoyConLeft.svg" />
     <EmbeddedResource Include="Assets\Icons\Controller_JoyConPair.svg" />
     <EmbeddedResource Include="Assets\Icons\Controller_JoyConRight.svg" />

src/Ryujinx/RyujinxApp.axaml

@@ -16,6 +16,5 @@
     <Application.Styles>
         <sty:FluentAvaloniaTheme PreferUserAccentColor="True" PreferSystemTheme="False" />
         <StyleInclude Source="/Assets/Styles/Styles.xaml" />
-        <StyleInclude Source="/Assets/Styles/CheckboxMenuItemStyle.axaml"/>
     </Application.Styles>
 </Application>

src/Ryujinx/UI/ViewModels/Input/ControllerInputViewModel.cs

@@ -1,11 +1,10 @@
 using Avalonia.Svg.Skia;
 using CommunityToolkit.Mvvm.ComponentModel;
-using CommunityToolkit.Mvvm.Input;
-using FluentAvalonia.UI.Controls;
-using Ryujinx.Ava.UI.Helpers;
 using Ryujinx.Ava.UI.Models.Input;
 using Ryujinx.Ava.UI.Views.Input;
+using Ryujinx.Common.Utilities;
 using Ryujinx.UI.Views.Input;
+using System.Drawing;
 
 namespace Ryujinx.Ava.UI.ViewModels.Input
 {
@@ -48,6 +47,23 @@ namespace Ryujinx.Ava.UI.ViewModels.Input
             ParentModel = model;
             model.NotifyChangesEvent += OnParentModelChanged;
             OnParentModelChanged();
+            config.PropertyChanged += (_, args) =>
+            {
+                if (args.PropertyName is nameof(Config.UseRainbowLed))
+                {
+                    if (Config is { UseRainbowLed: true, TurnOffLed: false, EnableLedChanging: true })
+                        Rainbow.Updated += (ref Color color) => ParentModel.SelectedGamepad.SetLed((uint)color.ToArgb());
+                    else
+                    {
+                        Rainbow.Reset();
+                        
+                        if (Config.TurnOffLed)
+                            ParentModel.SelectedGamepad.ClearLed();
+                        else
+                            ParentModel.SelectedGamepad.SetLed(Config.LedColor.ToUInt32());
+                    }
+                }
+            };
             Config = config;
         }
 

src/Ryujinx/UI/ViewModels/Input/InputViewModel.cs

@@ -23,6 +23,7 @@ using Ryujinx.Input;
 using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
+using System.Drawing;
 using System.IO;
 using System.Linq;
 using System.Text.Json;
@@ -63,7 +64,13 @@ namespace Ryujinx.Ava.UI.ViewModels.Input
             get => _selectedGamepad;
             private set
             {
+                Rainbow.Reset();
+                
                 _selectedGamepad = value;
+
+                if (ConfigViewModel is ControllerInputViewModel { Config.UseRainbowLed: true })
+                    Rainbow.Updated += (ref Color color) => _selectedGamepad.SetLed((uint)color.ToArgb());
+                
                 OnPropertiesChanged(nameof(HasLed), nameof(CanClearLed));
             }
         }

src/Ryujinx/UI/Views/Main/MainMenuBarView.axaml.cs

@@ -134,7 +134,12 @@ namespace Ryujinx.Ava.UI.Views.Main
         {
             Window.SettingsWindow = new(Window.VirtualFileSystem, Window.ContentManager);
 
+            Rainbow.Enable();
+            
             await Window.SettingsWindow.ShowDialog(Window);
+            
+            Rainbow.Disable();
+            Rainbow.Reset();
 
             Window.SettingsWindow = null;