Add FrameGraph (WIP)

2021-05-02 13:58:35 +02:00
parent 377129586b
commit 55c2dd8485
29 changed files with 1749 additions and 36 deletions
--- a/include/Nazara/Graphics/FrameGraph.hpp
+++ b/include/Nazara/Graphics/FrameGraph.hpp
@@ -0,0 +1,120 @@
+// Copyright (C) 2017 Jérôme Leclercq
+// 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_FRAMEGRAPH_HPP
+#define NAZARA_FRAMEGRAPH_HPP
+
+#include <Nazara/Prerequisites.hpp>
+#include <Nazara/Graphics/BakedFrameGraph.hpp>
+#include <Nazara/Graphics/Config.hpp>
+#include <Nazara/Graphics/FramePass.hpp>
+#include <Nazara/Graphics/FramePassAttachment.hpp>
+#include <Nazara/Renderer/Enums.hpp>
+#include <Nazara/Renderer/RenderPass.hpp>
+#include <optional>
+#include <string>
+#include <vector>
+#include <unordered_map>
+#include <unordered_set>
+
+namespace Nz
+{
+	class NAZARA_GRAPHICS_API FrameGraph
+	{
+		public:
+			FrameGraph() = default;
+			FrameGraph(const FrameGraph&) = delete;
+			FrameGraph(FrameGraph&&) noexcept = default;
+			~FrameGraph() = default;
+
+			inline std::size_t AddAttachment(FramePassAttachment attachment);
+			inline FramePass& AddPass(std::string name);
+
+			BakedFrameGraph Bake();
+
+			inline void SetBackbufferOutput(std::size_t backbufferOutput);
+
+			FrameGraph& operator=(const FrameGraph&) = delete;
+			FrameGraph& operator=(FrameGraph&&) noexcept = default;
+
+		private:
+			struct PassBarriers;
+
+			using BarrierList = std::vector<PassBarriers>;
+			using PassList = std::vector<std::size_t /*PassIndex*/>;
+			using AttachmentIdToPassMap = std::unordered_map<std::size_t /*resourceIndex*/, PassList /*passIndexes*/>;
+			using AttachmentIdToTextureId = std::unordered_map<std::size_t /*attachmentId*/, std::size_t /*textureId*/>;
+			using PassIdToPhysicalPassIndex = std::unordered_map<std::size_t /*passId*/, std::size_t /*physicalPassId*/>;
+			using TextureTransition = BakedFrameGraph::TextureTransition;
+
+			struct Barrier
+			{
+				std::size_t textureId;
+				MemoryAccessFlags access;
+				PipelineStageFlags stages;
+				TextureLayout layout;
+			};
+
+			struct PassBarriers
+			{
+				std::vector<Barrier> invalidationBarriers;
+				std::vector<Barrier> flushBarriers;
+			};
+
+			struct PhysicalPassData
+			{
+				struct Subpass
+				{
+					std::size_t passIndex;
+				};
+
+				std::vector<TextureTransition> textureTransitions;
+				std::vector<Subpass> passes;
+			};
+
+			struct TextureData
+			{
+				PixelFormat format;
+				TextureUsageFlags usage;
+				unsigned int width;
+				unsigned int height;
+			};
+
+			struct WorkData
+			{
+				std::size_t backbufferResourceIndex;
+				std::vector<std::shared_ptr<RenderPass>> renderPasses;
+				std::vector<PhysicalPassData> physicalPasses;
+				std::vector<TextureData> textures;
+				AttachmentIdToPassMap attachmentReadList;
+				AttachmentIdToPassMap attachmentWriteList;
+				AttachmentIdToTextureId attachmentToTextures;
+				BarrierList barrierList;
+				PassList passList;
+				PassIdToPhysicalPassIndex passIdToPhysicalPassIndex;
+			};
+
+			void AssignPhysicalPasses();
+			void AssignPhysicalTextures();
+			void BuildBarriers();
+			void BuildPhysicalBarriers();
+			void BuildPhysicalPassDependencies(std::size_t colorAttachmentCount, bool hasDepthStencilAttachment, std::vector<RenderPass::Attachment>& renderPassAttachments, std::vector<RenderPass::SubpassDescription>& subpasses, std::vector<RenderPass::SubpassDependency>& dependencies);
+			void BuildPhysicalPasses();
+			void BuildReadWriteList();
+			void RemoveDuplicatePasses();
+			void ReorderPasses();
+			void TraverseGraph(std::size_t passIndex);
+
+			std::optional<std::size_t> m_backbufferOutput;
+			std::vector<FramePass> m_framePasses;
+			std::vector<FramePassAttachment> m_attachments;
+			WorkData m_pending;
+	};
+}
+
+#include <Nazara/Graphics/FrameGraph.inl>
+
+#endif