Graphics: Add RenderSystem and frame pipeline

include/Nazara/Graphics/Systems/RenderSystem.hpp

@@ -0,0 +1,72 @@
+// Copyright (C) 2021 Jérôme Leclercq
+// This file is part of the "Nazara Engine - Utility module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#pragma once
+
+#ifndef NAZARA_RENDERSYSTEM_HPP
+#define NAZARA_RENDERSYSTEM_HPP
+
+#include <Nazara/Prerequisites.hpp>
+#include <Nazara/Core/ECS.hpp>
+#include <Nazara/Graphics/Graphics.hpp>
+#include <Nazara/Graphics/Components/GraphicsComponent.hpp>
+#include <Nazara/Utility/Node.hpp>
+#include <memory>
+#include <set>
+#include <unordered_map>
+
+namespace Nz
+{
+	class CommandBufferBuilder;
+	class FramePipeline;
+	class RenderFrame;
+	class UploadPool;
+
+	class NAZARA_GRAPHICS_API RenderSystem
+	{
+		public:
+			RenderSystem(entt::registry& registry);
+			RenderSystem(const RenderSystem&) = delete;
+			RenderSystem(RenderSystem&&) = delete;
+			~RenderSystem();
+
+			void Render(entt::registry& registry, RenderFrame& renderFrame);
+
+			RenderSystem& operator=(const RenderSystem&) = delete;
+			RenderSystem& operator=(RenderSystem&&) = delete;
+
+		private:
+			void OnCameraDestroy(entt::registry& registry, entt::entity entity);
+			void OnGraphicsDestroy(entt::registry& registry, entt::entity entity);
+			void OnNodeDestroy(entt::registry& registry, entt::entity entity);
+			void UpdateInstances(entt::registry& registry);
+
+			struct CameraEntity
+			{
+				NazaraSlot(Node, OnNodeInvalidation, onNodeInvalidation);
+			};
+
+			struct GraphicsEntity
+			{
+				NazaraSlot(GraphicsComponent, OnRenderableAttached, onRenderableAttached);
+				NazaraSlot(GraphicsComponent, OnRenderableDetach, onRenderableDetach);
+				NazaraSlot(Node, OnNodeInvalidation, onNodeInvalidation);
+			};
+
+			entt::connection m_cameraDestroyConnection;
+			entt::connection m_graphicsDestroyConnection;
+			entt::connection m_nodeDestroyConnection;
+			entt::observer m_cameraConstructObserver;
+			entt::observer m_graphicsConstructObserver;
+			std::set<entt::entity> m_invalidatedCameraNode;
+			std::set<entt::entity> m_invalidatedWorldNode;
+			std::unique_ptr<FramePipeline> m_pipeline;
+			std::unordered_map<entt::entity, CameraEntity> m_cameraEntities;
+			std::unordered_map<entt::entity, GraphicsEntity> m_graphicsEntities;
+	};
+}
+
+#include <Nazara/Graphics/Systems/RenderSystem.inl>
+
+#endif