lbl: Migrate service to Horizon (#5628)

* lbl: Migrate service to Horizon

* Fix formatting

* Addresses gdkchan's feedback

* Fix comments

src/Ryujinx.Horizon/Sdk/Lbl/ILblController.cs

@@ -0,0 +1,20 @@
+using Ryujinx.Horizon.Common;
+using Ryujinx.Horizon.Sdk.Sf;
+
+namespace Ryujinx.Horizon.Sdk.Lbl
+{
+    interface ILblController : IServiceObject
+    {
+        Result SetBrightnessReflectionDelayLevel(float unknown0, float unknown1);
+        Result GetBrightnessReflectionDelayLevel(out float unknown1, float unknown0);
+        Result SetCurrentBrightnessMapping(float unknown0, float unknown1, float unknown2);
+        Result GetCurrentBrightnessMapping(out float unknown0, out float unknown1, out float unknown2);
+        Result SetCurrentAmbientLightSensorMapping(float unknown0, float unknown1, float unknown2);
+        Result GetCurrentAmbientLightSensorMapping(out float unknown0, out float unknown1, out float unknown2);
+        Result SetCurrentBrightnessSettingForVrMode(float currentBrightnessSettingForVrMode);
+        Result GetCurrentBrightnessSettingForVrMode(out float currentBrightnessSettingForVrMode);
+        Result EnableVrMode();
+        Result DisableVrMode();
+        Result IsVrModeEnabled(out bool vrModeEnabled);
+    }
+}

src/Ryujinx.Horizon/Sdk/Lbl/LblApi.cs

@@ -0,0 +1,43 @@
+using Ryujinx.Horizon.Common;
+using Ryujinx.Horizon.Sdk.Sm;
+using System;
+
+namespace Ryujinx.Horizon.Sdk.Lbl
+{
+    public class LblApi : IDisposable
+    {
+        private const string LblName = "lbl";
+
+        private int _sessionHandle;
+
+        public LblApi()
+        {
+            using var smApi = new SmApi();
+
+            smApi.Initialize();
+            smApi.GetServiceHandle(out _sessionHandle, ServiceName.Encode(LblName)).AbortOnFailure();
+        }
+
+        public Result EnableVrMode()
+        {
+            return ServiceUtil.SendRequest(out _, _sessionHandle, 26, sendPid: false, ReadOnlySpan<byte>.Empty);
+        }
+
+        public Result DisableVrMode()
+        {
+            return ServiceUtil.SendRequest(out _, _sessionHandle, 27, sendPid: false, ReadOnlySpan<byte>.Empty);
+        }
+
+        public void Dispose()
+        {
+            if (_sessionHandle != 0)
+            {
+                HorizonStatic.Syscall.CloseHandle(_sessionHandle);
+
+                _sessionHandle = 0;
+            }
+
+            GC.SuppressFinalize(this);
+        }
+    }
+}

src/Ryujinx.Horizon/Sdk/Sm/ServiceName.cs

@@ -4,7 +4,7 @@ using System.Runtime.InteropServices;
 namespace Ryujinx.Horizon.Sdk.Sm
 {
     [StructLayout(LayoutKind.Sequential, Pack = 1)]
-    readonly struct ServiceName
+    public readonly struct ServiceName
     {
         public static ServiceName Invalid { get; } = new(0);
 

src/Ryujinx.Horizon/Sdk/Sm/SmApi.cs

@@ -5,7 +5,7 @@ using System;
 
 namespace Ryujinx.Horizon.Sdk.Sm
 {
-    class SmApi
+    public class SmApi : IDisposable
     {
         private const string SmName = "sm:";
 
@@ -109,5 +109,17 @@ namespace Ryujinx.Horizon.Sdk.Sm
 
             return ServiceUtil.SendRequest(out _, _portHandle, 4, sendPid: true, data);
         }
+
+        public void Dispose()
+        {
+            if (_portHandle != 0)
+            {
+                HorizonStatic.Syscall.CloseHandle(_portHandle);
+
+                _portHandle = 0;
+            }
+
+            GC.SuppressFinalize(this);
+        }
     }
 }