frontend: Add a SDL2 headless window (#2310)

Ryujinx.Headless.SDL2/SDL2Mouse.cs

@@ -0,0 +1,90 @@
+using Ryujinx.Common.Configuration.Hid;
+using Ryujinx.Input;
+using System;
+using System.Drawing;
+using System.Numerics;
+
+namespace Ryujinx.Headless.SDL2
+{
+    class SDL2Mouse : IMouse
+    {
+        private SDL2MouseDriver _driver;
+
+        public GamepadFeaturesFlag Features => throw new NotImplementedException();
+
+        public string Id => "0";
+
+        public string Name => "SDL2Mouse";
+
+        public bool IsConnected => true;
+
+        public bool[] Buttons => _driver.PressedButtons;
+
+        Size IMouse.ClientSize => _driver.GetClientSize();
+
+        public SDL2Mouse(SDL2MouseDriver driver)
+        {
+            _driver = driver;
+        }
+
+        public Vector2 GetPosition()
+        {
+            return _driver.CurrentPosition;
+        }
+
+        public Vector2 GetScroll()
+        {
+            return _driver.Scroll;
+        }
+
+        public GamepadStateSnapshot GetMappedStateSnapshot()
+        {
+            throw new NotImplementedException();
+        }
+
+        public Vector3 GetMotionData(MotionInputId inputId)
+        {
+            throw new NotImplementedException();
+        }
+
+        public GamepadStateSnapshot GetStateSnapshot()
+        {
+            throw new NotImplementedException();
+        }
+
+        public (float, float) GetStick(StickInputId inputId)
+        {
+            throw new NotImplementedException();
+        }
+
+        public bool IsButtonPressed(MouseButton button)
+        {
+            return _driver.IsButtonPressed(button);
+        }
+
+        public bool IsPressed(GamepadButtonInputId inputId)
+        {
+            throw new NotImplementedException();
+        }
+
+        public void Rumble(float lowFrequency, float highFrequency, uint durationMs)
+        {
+            throw new NotImplementedException();
+        }
+
+        public void SetConfiguration(InputConfig configuration)
+        {
+            throw new NotImplementedException();
+        }
+
+        public void SetTriggerThreshold(float triggerThreshold)
+        {
+            throw new NotImplementedException();
+        }
+
+        public void Dispose()
+        {
+            _driver = null;
+        }
+    }
+}