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() { }
+    }
+}

Ryujinx.Input/IMouse.cs

@@ -0,0 +1,100 @@
+using System.Drawing;
+using System.Numerics;
+
+namespace Ryujinx.Input
+{
+    /// <summary>
+    /// Represent an emulated mouse.
+    /// </summary>
+    public interface IMouse : IGamepad
+    {
+        private const int SwitchPanelWidth = 1280;
+        private const int SwitchPanelHeight = 720;
+
+        /// <summary>
+        /// Check if a given button is pressed on the mouse.
+        /// </summary>
+        /// <param name="button">The button</param>
+        /// <returns>True if the given button is pressed on the mouse</returns>
+        bool IsButtonPressed(MouseButton button);
+
+        /// <summary>
+        /// Get the position of the mouse in the client.
+        /// </summary>
+        Vector2 GetPosition();
+
+        /// <summary>
+        /// Get the client size.
+        /// </summary>
+        Size ClientSize { get; }
+
+        /// <summary>
+        /// Get the button states of the mouse.
+        /// </summary>
+        bool[] Buttons { get; }
+
+        /// <summary>
+        /// Get a snaphost of the state of a mouse.
+        /// </summary>
+        /// <param name="mouse">The mouse to do a snapshot of</param>
+        /// <returns>A snaphost of the state of the mouse.</returns>
+        public static MouseStateSnapshot GetMouseStateSnapshot(IMouse mouse)
+        {
+            var position = mouse.GetPosition();
+            bool[] buttons = new bool[(int)MouseButton.Count];
+
+            mouse.Buttons.CopyTo(buttons, 0);
+
+            return new MouseStateSnapshot(buttons, position);
+        }
+
+        /// <summary>
+        /// Get the touch position of a mouse position relative to the app's view
+        /// </summary>
+        /// <param name="mousePosition">The position of the mouse in the client</param>
+        /// <param name="clientSize">The size of the client</param>
+        /// <param name="aspectRatio">The aspect ratio of the view</param>
+        /// <returns>A snaphost of the state of the mouse.</returns>
+        public static Vector2 GetTouchPosition(Vector2 mousePosition, Size clientSize, float aspectRatio)
+        {
+            float mouseX = mousePosition.X;
+            float mouseY = mousePosition.Y;
+
+            float aspectWidth = SwitchPanelHeight * aspectRatio;
+
+            int screenWidth = clientSize.Width;
+            int screenHeight = clientSize.Height;
+
+            if (clientSize.Width > clientSize.Height * aspectWidth / SwitchPanelHeight)
+            {
+                screenWidth = (int)(clientSize.Height * aspectWidth) / SwitchPanelHeight;
+            }
+            else
+            {
+                screenHeight = (clientSize.Width * SwitchPanelHeight) / (int)aspectWidth;
+            }
+
+            int startX = (clientSize.Width - screenWidth) >> 1;
+            int startY = (clientSize.Height - screenHeight) >> 1;
+
+            int endX = startX + screenWidth;
+            int endY = startY + screenHeight;
+
+            if (mouseX >= startX &&
+                mouseY >= startY &&
+                mouseX < endX &&
+                mouseY < endY)
+            {
+                int screenMouseX = (int)mouseX - startX;
+                int screenMouseY = (int)mouseY - startY;
+
+                mouseX = (screenMouseX * (int)aspectWidth) / screenWidth;
+                mouseY = (screenMouseY * SwitchPanelHeight) / screenHeight;
+
+                return new Vector2(mouseX, mouseY);
+            }
+
+            return new Vector2();
+        }
+    }
+}

Ryujinx.Input/MouseButton.cs

@@ -0,0 +1,16 @@
+namespace Ryujinx.Input
+{
+    public enum MouseButton : byte
+    {
+        Button1,
+        Button2,
+        Button3,
+        Button4,
+        Button5,
+        Button6,
+        Button7,
+        Button8,
+        Button9,
+        Count
+    }
+}

Ryujinx.Input/MouseStateSnapshot.cs

@@ -0,0 +1,34 @@
+using System.Numerics;
+using System.Runtime.CompilerServices;
+
+namespace Ryujinx.Input
+{
+    /// <summary>
+    /// A snapshot of a <see cref="IMouse"/>.
+    /// </summary>
+    public class MouseStateSnapshot
+    {
+        private bool[] _buttonState;
+
+        public Vector2 Position { get; }
+
+        /// <summary>
+        /// Create a new <see cref="MouseStateSnapshot"/>.
+        /// </summary>
+        /// <param name="buttonState">The keys state</param>
+        public MouseStateSnapshot(bool[] buttonState, Vector2 position)
+        {
+            _buttonState = buttonState;
+
+            Position = position;
+        }
+
+        /// <summary>
+        /// Check if a given button is pressed.
+        /// </summary>
+        /// <param name="button">The button</param>
+        /// <returns>True if the given button is pressed</returns>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public bool IsPressed(MouseButton button) => _buttonState[(int)button];
+    }
+}