OpenGL: Implement VAOs

include/Nazara/OpenGLRenderer/OpenGLVaoCache.hpp

@@ -0,0 +1,73 @@
+// Copyright (C) 2015 Jérôme Leclercq
+// This file is part of the "Nazara Engine - OpenGL Renderer"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#pragma once
+
+#ifndef NAZARA_OPENGLRENDERER_OPENGLVAOCACHE_HPP
+#define NAZARA_OPENGLRENDERER_OPENGLVAOCACHE_HPP
+
+#include <Nazara/Prerequisites.hpp>
+#include <Nazara/OpenGLRenderer/Config.hpp>
+#include <Nazara/OpenGLRenderer/Wrapper/CoreFunctions.hpp>
+#include <array>
+#include <memory>
+#include <optional>
+#include <unordered_map>
+
+namespace Nz::GL
+{
+	struct OpenGLVaoSetup
+	{
+		struct Attribs
+		{
+			GLuint vertexBuffer;
+			GLint size;
+			GLenum type;
+			GLboolean normalized;
+			GLsizei stride;
+			const void* pointer;
+		};
+
+		GLuint indexBuffer = 0;
+		std::array<std::optional<Attribs>, 16> vertexAttribs;
+
+		inline friend bool operator==(const OpenGLVaoSetup& lhs, const OpenGLVaoSetup& rhs);
+	};
+
+	struct OpenGLVaoSetupHasher
+	{
+		inline std::size_t operator()(const OpenGLVaoSetup& setup) const;
+	};
+
+	class Context;
+	class VertexArray;
+
+	class NAZARA_OPENGLRENDERER_API OpenGLVaoCache
+	{
+		friend Context;
+
+		public:
+			OpenGLVaoCache(Context& owner);
+			OpenGLVaoCache(const OpenGLVaoCache&) = delete;
+			OpenGLVaoCache(OpenGLVaoCache&&) = delete;
+			~OpenGLVaoCache();
+
+			void Clear();
+
+			const VertexArray& Get(const OpenGLVaoSetup& setup) const;
+
+			OpenGLVaoCache& operator=(const OpenGLVaoCache&) = delete;
+			OpenGLVaoCache& operator=(OpenGLVaoCache&&) = delete;
+
+		private:
+			void NotifyBufferDestruction(GLuint buffer);
+
+			mutable std::unordered_map<OpenGLVaoSetup, std::unique_ptr<VertexArray>, OpenGLVaoSetupHasher> m_vertexArrays;
+			Context& m_context;
+	};
+}
+
+#include <Nazara/OpenGLRenderer/OpenGLVaoCache.inl>
+
+#endif