Add TouchScreen Manager (#2333)

Ryujinx.Input/HLE/InputManager.cs

@@ -6,6 +6,7 @@ namespace Ryujinx.Input.HLE
     {
         public IGamepadDriver KeyboardDriver { get; private set; }
         public IGamepadDriver GamepadDriver { get; private set; }
+        public IGamepadDriver MouseDriver { get; private set; }
 
         public InputManager(IGamepadDriver keyboardDriver, IGamepadDriver gamepadDriver)
         {
@@ -13,10 +14,27 @@ namespace Ryujinx.Input.HLE
             GamepadDriver = gamepadDriver;
         }
 
+        public void SetMouseDriver(IGamepadDriver mouseDriver)
+        {
+            MouseDriver?.Dispose();
+
+            MouseDriver = mouseDriver;
+        }
+
         public NpadManager CreateNpadManager()
         {
             return new NpadManager(KeyboardDriver, GamepadDriver);
         }
+        
+        public TouchScreenManager CreateTouchScreenManager()
+        {
+            if (MouseDriver == null)
+            {
+                throw new InvalidOperationException("Mouse Driver has not been initialized.");
+            }
+
+            return new TouchScreenManager(MouseDriver.GetGamepad("0") as IMouse);
+        }
 
         protected virtual void Dispose(bool disposing)
         {
@@ -24,6 +42,7 @@ namespace Ryujinx.Input.HLE
             {
                 KeyboardDriver?.Dispose();
                 GamepadDriver?.Dispose();
+                MouseDriver?.Dispose();
             }
         }
 

Ryujinx.Input/HLE/TouchScreenManager.cs

@@ -0,0 +1,57 @@
+using Ryujinx.HLE;
+using Ryujinx.HLE.HOS.Services.Hid;
+using System;
+
+namespace Ryujinx.Input.HLE
+{
+    public class TouchScreenManager : IDisposable
+    {
+        private readonly IMouse _mouse;
+        private Switch _device;
+
+        public TouchScreenManager(IMouse mouse)
+        {
+            _mouse = mouse;
+        }
+
+        public void Initialize(Switch device)
+        {
+            _device = device;
+        }
+
+        public bool Update(bool isFocused, float aspectRatio = 0)
+        {
+            if (!isFocused)
+            {
+                _device.Hid.Touchscreen.Update();
+
+                return false;
+            }
+
+            if (aspectRatio > 0)
+            {
+                var snapshot = IMouse.GetMouseStateSnapshot(_mouse);
+                var touchPosition = IMouse.GetTouchPosition(snapshot.Position, _mouse.ClientSize, aspectRatio);
+
+                TouchPoint currentPoint = new TouchPoint
+                {
+                    X = (uint)touchPosition.X,
+                    Y = (uint)touchPosition.Y,
+
+                    // Placeholder values till more data is acquired
+                    DiameterX = 10,
+                    DiameterY = 10,
+                    Angle = 90
+                };
+
+                _device.Hid.Touchscreen.Update(currentPoint);
+
+                return true;
+            }
+
+            return false;
+        }
+
+        public void Dispose() { }
+    }
+}