feat: add support for keyboard and mouse input

Minecraft.Client/Windows64/KeyboardMouseInput.h

@@ -0,0 +1,76 @@
+#pragma once
+
+#ifdef _WINDOWS64
+
+#include <windows.h>
+
+// HID usage page and usage for raw input registration
+#ifndef HID_USAGE_PAGE_GENERIC
+#define HID_USAGE_PAGE_GENERIC ((USHORT)0x01)
+#endif
+#ifndef HID_USAGE_GENERIC_MOUSE
+#define HID_USAGE_GENERIC_MOUSE ((USHORT)0x02)
+#endif
+
+class KeyboardMouseInput
+{
+public:
+	KeyboardMouseInput();
+	~KeyboardMouseInput();
+
+	void Init(HWND hWnd);
+	void Tick();
+	void EndFrame();
+
+	// Called from WndProc
+	void OnKeyDown(WPARAM vk);
+	void OnKeyUp(WPARAM vk);
+	void OnRawMouseInput(LPARAM lParam);
+	void OnMouseButton(int button, bool down);
+	void OnMouseWheel(int delta);
+	void ClearAllState();
+
+	// Key state queries (call after Tick)
+	bool IsKeyDown(int vk) const;
+	bool IsKeyPressed(int vk) const;
+	bool IsKeyReleased(int vk) const;
+
+	// Mouse button queries: 0=left, 1=right, 2=middle
+	bool IsMouseDown(int btn) const;
+	bool IsMousePressed(int btn) const;
+	bool IsMouseReleased(int btn) const;
+
+	// Mouse deltas (consumed each Tick)
+	float GetMouseDeltaX() const;
+	float GetMouseDeltaY() const;
+	int GetScrollDelta() const;
+
+	// Mouse capture for FPS look
+	void SetCapture(bool capture);
+	bool IsCaptured() const;
+
+private:
+	void CenterCursor();
+
+	bool m_keyState[256];
+	bool m_keyStatePrev[256];
+
+	bool m_mouseButtons[3];
+	bool m_mouseButtonsPrev[3];
+
+	float m_mouseDeltaX;
+	float m_mouseDeltaY;
+	float m_mouseDeltaXAccum;
+	float m_mouseDeltaYAccum;
+
+	int m_scrollDelta;
+	int m_scrollDeltaAccum;
+
+	bool m_captured;
+	HWND m_hWnd;
+	bool m_initialized;
+};
+
+extern KeyboardMouseInput KMInput;
+
+#endif // _WINDOWS64