Implement UploadPool to efficiently update UBOs

include/Nazara/VulkanRenderer/VulkanUploadPool.hpp

@@ -0,0 +1,61 @@
+// Copyright (C) 2020 Jérôme Leclercq
+// This file is part of the "Nazara Engine - Renderer module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#pragma once
+
+#ifndef NAZARA_VULKANRENDERER_VULKANUPLOADPOOL_HPP
+#define NAZARA_VULKANRENDERER_VULKANUPLOADPOOL_HPP
+
+#include <Nazara/Prerequisites.hpp>
+#include <Nazara/Core/MovablePtr.hpp>
+#include <Nazara/VulkanRenderer/Wrapper/Buffer.hpp>
+#include <Nazara/VulkanRenderer/Wrapper/DeviceMemory.hpp>
+#include <optional>
+#include <vector>
+
+namespace Nz
+{
+	class NAZARA_VULKANRENDERER_API VulkanUploadPool
+	{
+		public:
+			struct AllocationData;
+
+			inline VulkanUploadPool(Vk::Device& device, UInt64 blockSize);
+			VulkanUploadPool(const VulkanUploadPool&) = delete;
+			VulkanUploadPool(VulkanUploadPool&&) noexcept = default;
+			~VulkanUploadPool() = default;
+
+			std::optional<AllocationData> Allocate(UInt64 size);
+			std::optional<AllocationData> Allocate(UInt64 size, UInt64 alignment);
+
+			void Reset();
+
+			struct AllocationData
+			{
+				VkBuffer buffer;
+				void* mappedPtr;
+				UInt64 offset;
+				UInt64 size;
+			};
+
+			VulkanUploadPool& operator=(const VulkanUploadPool&) = delete;
+			VulkanUploadPool& operator=(VulkanUploadPool&&) = delete;
+
+		private:
+			struct Block
+			{
+				Vk::DeviceMemory blockMemory;
+				Vk::Buffer buffer;
+				UInt64 freeOffset;
+			};
+
+			UInt64 m_blockSize;
+			Vk::Device& m_device;
+			std::vector<Block> m_blocks;
+	};
+}
+
+#include <Nazara/VulkanRenderer/VulkanUploadPool.inl>
+
+#endif // NAZARA_VULKANRENDERER_VULKANUPLOADPOOL_HPP