fixing put pixel, adding scene change checker

runtime/Includes/Utils/CallOnExit.h

@@ -0,0 +1,33 @@
+#ifndef __MLX_CALL_ON_EXIT__
+#define __MLX_CALL_ON_EXIT__
+
+namespace mlx
+{
+	template <typename F>
+	class CallOnExit
+	{
+		public:
+			CallOnExit() = default;
+			CallOnExit(F&& functor);
+			CallOnExit(const CallOnExit&) = delete;
+			CallOnExit(CallOnExit&&) = delete;
+
+			void CallAndReset();
+			void Reset();
+
+			CallOnExit& operator=(const CallOnExit&) = delete;
+			CallOnExit& operator=(CallOnExit&&) = default;
+
+			~CallOnExit();
+
+		private:
+			std::optional<F> m_functor;
+	};
+
+	template<typename F>
+	CallOnExit(F) -> CallOnExit<F>;
+}
+
+#include <Utils/CallOnExit.inl>
+
+#endif

runtime/Includes/Utils/CallOnExit.inl

@@ -0,0 +1,29 @@
+#pragma once
+#include <Utils/CallOnExit.h>
+
+namespace mlx
+{
+	template<typename F>
+	CallOnExit<F>::CallOnExit(F&& functor) : m_functor(std::move(functor)) {}
+
+	template<typename F>
+	CallOnExit<F>::~CallOnExit()
+	{
+		if(m_functor.has_value())
+			(*m_functor)();
+	}
+
+	template<typename F>
+	void CallOnExit<F>::CallAndReset()
+	{
+		if(m_functor.has_value())
+			(*m_functor)();
+		m_functor.reset();
+	}
+
+	template<typename F>
+	void CallOnExit<F>::Reset()
+	{
+		m_functor.reset();
+	}
+}