Implemented basic input polling

GlitchyEngine/src/Input.bf

@@ -0,0 +1,21 @@
+using System;
+using GlitchyEngine.Events;
+using GlitchyEngine.Math;
+
+namespace GlitchyEngine
+{
+	public static class Input
+	{
+		public static extern bool IsKeyPressed(int32 keycode);
+		public static extern bool IsKeyReleased(int32 keycode);
+		public static extern bool IsKeyToggled(int32 keycode);
+
+		public static extern bool IsMouseButtonPressed(MouseButton button);
+		public static extern bool IsMouseButtonReleased(MouseButton button);
+		
+		public static extern int32 GetMouseX();
+		public static extern int32 GetMouseY();
+
+		public static extern Point GetMousePosition();
+	}
+}

GlitchyEngine/src/Platform/Windows/WindowsInput.bf

@@ -0,0 +1,102 @@
+using System;
+using GlitchyEngine.Events;
+using DirectX.Windows.VirtualKeyCodes;
+using DirectX.Windows;
+using GlitchyEngine.Math;
+using static System.Windows;
+
+namespace GlitchyEngine
+{
+	extension Input
+	{
+		[CLink, CallingConvention(.Stdcall)]
+		static extern int16 GetKeyState(int32 keycode);
+		
+		public override static bool IsKeyPressed(int32 keycode)
+		{
+			int16 state = GetKeyState(keycode);
+			return state < 0;
+		}
+		
+		public override static bool IsKeyReleased(int32 keycode)
+		{
+			int16 state = GetKeyState(keycode);
+			return state >= 0;
+		}
+		
+		public override static bool IsKeyToggled(int32 keycode)
+		{
+			int16 state = GetKeyState(keycode);
+			return (state & 0x1) == 1;
+		}
+
+		private static mixin MouseButtonToKeyCode(MouseButton button)
+		{
+			int32 keycode;
+			switch(button)
+			{
+			case .LeftButton:
+				keycode = VK_LBUTTON;
+			case .RightButton:
+				keycode = VK_RBUTTON;
+			case .MiddleButton:
+				keycode = VK_MBUTTON;
+			case .XButton1:
+				keycode = VK_XBUTTON1;
+			case .XButton2:
+				keycode = VK_XBUTTON2;
+			case default:
+				return false;
+			}
+
+			keycode
+		}
+
+		public override static bool IsMouseButtonPressed(MouseButton button)
+		{
+			int16 state = GetKeyState(MouseButtonToKeyCode!(button));
+			return state < 0;
+		}
+
+		public override static bool IsMouseButtonReleased(MouseButton button)
+		{
+			int16 state = GetKeyState(MouseButtonToKeyCode!(button));
+			return state >= 0;
+		}
+
+		[CLink, CallingConvention(.Stdcall)]
+		static extern IntBool GetCursorPos(out Point p);
+		[CLink, CallingConvention(.Stdcall)]
+		static extern IntBool ScreenToClient(HWnd hWnd, ref Point p);
+
+		static mixin GetMousePos()
+		{
+			Point point;
+			if (GetCursorPos(out point))
+			{
+				HWnd windowHandle = (HWnd)(int)Application.Get().Window.NativeWindow;
+				if (ScreenToClient(windowHandle, ref point))
+				{
+					// Todo: error handling?
+				}
+			}
+
+			point
+		}
+
+		public override static Point GetMousePosition()
+		{
+			return GetMousePos!();
+		}
+
+		public override static int32 GetMouseX()
+		{
+			return GetMousePos!().X;
+		}
+
+		public override static int32 GetMouseY()
+		{
+			return GetMousePos!().Y;
+		}
+	}
+}