Replace RenderWindow with swapchains

include/Nazara/OpenGLRenderer/OpenGLSwapchain.inl

@@ -0,0 +1,18 @@
+// Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+// This file is part of the "Nazara Engine - OpenGL renderer"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#include <Nazara/OpenGLRenderer/OpenGLSwapchain.hpp>
+#include <cassert>
+#include <Nazara/OpenGLRenderer/Debug.hpp>
+
+namespace Nz
+{
+	inline GL::Context& OpenGLSwapchain::GetContext()
+	{
+		assert(m_context);
+		return *m_context;
+	}
+}
+
+#include <Nazara/OpenGLRenderer/DebugOff.hpp>