Renderer: Improve code

include/Nazara/Renderer/Enums.hpp

@@ -114,6 +114,8 @@ namespace Nz
 		Max = Unknown
 	};
 
+	constexpr std::size_t RenderAPICount = static_cast<std::size_t>(RenderAPI::Max) + 1;
+
 	enum class RenderDeviceType
 	{
 		Integrated, ///< Hardware-accelerated chipset integrated to a CPU (ex: Intel Graphics HD 4000)

include/Nazara/Renderer/Renderer.hpp

@@ -44,10 +44,12 @@ namespace Nz
 
 			struct Config
 			{
-				Nz::RenderAPI preferredAPI = Nz::RenderAPI::Unknown;
+				Nz::RenderAPI preferredAPI = RenderAPI::Unknown;
 			};
 
 		private:
+			void LoadBackend(const Config& config);
+
 			std::unique_ptr<RendererImpl> m_rendererImpl;
 			DynLib m_rendererLib;