Kernel: Combine consecutive mouse move and scroll events

This makes mouse work much smoother when running without kvm.

BAN/include/BAN/CircularQueue.h

@@ -31,6 +31,9 @@ namespace BAN
 		const T& front() const;
 		T& front();
 
+		const T& back() const;
+		T& back();
+
 		size_type size() const { return m_size; }
 		bool empty() const { return size() == 0; }
 		bool full() const { return size() == capacity(); }
@@ -98,6 +101,20 @@ namespace BAN
 		return *element_at(m_first);
 	}
 
+	template<typename T, size_t S>
+	const T& CircularQueue<T, S>::back() const
+	{
+		ASSERT(!empty());
+		return *element_at((m_first + m_size - 1) % capacity());
+	}
+
+	template<typename T, size_t S>
+	T& CircularQueue<T, S>::back()
+	{
+		ASSERT(!empty());
+		return *element_at((m_first + m_size - 1) % capacity());
+	}
+
 	template<typename T, size_t S>
 	const T* CircularQueue<T, S>::element_at(size_type index) const
 	{

kernel/kernel/Input/PS2/Mouse.cpp

@@ -165,6 +165,22 @@ namespace Kernel::Input
 
 		for (int i = 0; i < event_count; i++)
 		{
+			if (!m_event_queue.empty() && m_event_queue.back().type == events[i].type)
+			{
+				if (events[i].type == MouseEventType::MouseMoveEvent)
+				{
+					m_event_queue.back().move_event.rel_x += events[i].move_event.rel_x;
+					m_event_queue.back().move_event.rel_y += events[i].move_event.rel_y;
+					continue;
+				}
+
+				if (events[i].type == MouseEventType::MouseScrollEvent)
+				{
+					m_event_queue.back().scroll_event.scroll += events[i].scroll_event.scroll;
+					continue;
+				}
+			}
+
 			if (m_event_queue.full())
 			{
 				dwarnln("PS/2 event queue full");