87 lines
2.7 KiB
C++
87 lines
2.7 KiB
C++
// Copyright 2019 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <optional>
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#include <span>
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#include <tuple>
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#include <vector>
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#include "video_core/renderer_vulkan/vk_common.h"
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namespace Vulkan {
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enum class BufferType : u32 {
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Upload = 0,
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Download = 1,
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Stream = 2,
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};
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class Instance;
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class Scheduler;
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class StreamBuffer final {
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static constexpr std::size_t MAX_BUFFER_VIEWS = 3;
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public:
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explicit StreamBuffer(const Instance& instance, Scheduler& scheduler,
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vk::BufferUsageFlags usage, u64 size,
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BufferType type = BufferType::Stream);
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~StreamBuffer();
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/**
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* Reserves a region of memory from the stream buffer.
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* @param size Size to reserve.
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* @returns A pair of a raw memory pointer (with offset added), and the buffer offset
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*/
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std::tuple<u8*, u64, bool> Map(u64 size, u64 alignment);
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/// Ensures that "size" bytes of memory are available to the GPU, potentially recording a copy.
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void Commit(u64 size);
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vk::Buffer Handle() const noexcept {
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return buffer;
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}
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private:
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struct Watch {
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u64 tick{};
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u64 upper_bound{};
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};
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/// Creates Vulkan buffer handles committing the required the required memory.
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void CreateBuffers(u64 prefered_size);
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/// Increases the amount of watches available.
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void ReserveWatches(std::vector<Watch>& watches, std::size_t grow_size);
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void WaitPendingOperations(u64 requested_upper_bound);
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private:
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const Instance& instance; ///< Vulkan instance.
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Scheduler& scheduler; ///< Command scheduler.
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vk::Device device;
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vk::Buffer buffer; ///< Mapped buffer.
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vk::DeviceMemory memory; ///< Memory allocation.
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u8* mapped{}; ///< Pointer to the mapped memory
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u64 stream_buffer_size{}; ///< Stream buffer size.
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vk::BufferUsageFlags usage{};
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BufferType type;
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u64 offset{}; ///< Buffer iterator.
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u64 mapped_size{}; ///< Size reserved for the current copy.
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bool is_coherent{}; ///< True if the buffer is coherent
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std::vector<Watch> current_watches; ///< Watches recorded in the current iteration.
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std::size_t current_watch_cursor{}; ///< Count of watches, reset on invalidation.
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std::optional<std::size_t> invalidation_mark; ///< Number of watches used in the previous cycle.
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std::vector<Watch> previous_watches; ///< Watches used in the previous iteration.
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std::size_t wait_cursor{}; ///< Last watch being waited for completion.
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u64 wait_bound{}; ///< Highest offset being watched for completion.
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};
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} // namespace Vulkan
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