Graphics: Use memory pools for render elements

include/Nazara/Graphics/RenderElementPool.hpp

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+// Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+// This file is part of the "Nazara Engine - Graphics module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#pragma once
+
+#ifndef NAZARA_GRAPHICS_RENDERELEMENTPOOL_HPP
+#define NAZARA_GRAPHICS_RENDERELEMENTPOOL_HPP
+
+#include <Nazara/Prerequisites.hpp>
+#include <Nazara/Graphics/Config.hpp>
+#include <Nazara/Graphics/RenderElementOwner.hpp>
+#include <Nazara/Utils/MemoryPool.hpp>
+
+namespace Nz
+{
+	class RenderElementOwner;
+
+	class NAZARA_GRAPHICS_API RenderElementPoolBase
+	{
+		public:
+			RenderElementPoolBase() = default;
+			RenderElementPoolBase(const RenderElementPoolBase&) = delete;
+			RenderElementPoolBase(RenderElementPoolBase&&) = delete;
+			virtual ~RenderElementPoolBase();
+
+			virtual void Clear() = 0;
+
+			virtual void Free(std::size_t index) = 0;
+
+			RenderElementPoolBase& operator=(const RenderElementPoolBase&) = delete;
+			RenderElementPoolBase& operator=(RenderElementPoolBase&&) = delete;
+	};
+
+	template<typename T>
+	class RenderElementPool final : public RenderElementPoolBase
+	{
+		public:
+			RenderElementPool();
+			RenderElementPool(const RenderElementPool&) = delete;
+			RenderElementPool(RenderElementPool&&) = delete;
+			~RenderElementPool() = default;
+
+			template<typename... Args> RenderElementOwner Allocate(Args&&... args);
+
+			void Clear() override;
+
+			void Free(std::size_t index) override;
+
+			RenderElementPool& operator=(const RenderElementPool&) = delete;
+			RenderElementPool& operator=(RenderElementPool&&) = delete;
+
+		private:
+			MemoryPool<T> m_pool;
+	};
+}
+
+#include <Nazara/Graphics/RenderElementPool.inl>
+
+#endif // NAZARA_GRAPHICS_RENDERELEMENTPOOL_HPP