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// Copyright 2019 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <optional>
#include <tuple>
#include <vector>
#include "common/common_types.h"
#include "video_core/renderer_vulkan/wrapper.h"
namespace Vulkan {
class VKDevice;
class VKFence;
class VKFenceWatch;
class VKScheduler;
class VKStreamBuffer final {
public:
explicit VKStreamBuffer(const VKDevice& device, VKScheduler& scheduler,
VkBufferUsageFlags usage);
~VKStreamBuffer();
/**
* Reserves a region of memory from the stream buffer.
* @param size Size to reserve.
* @returns A tuple in the following order: Raw memory pointer (with offset added), buffer
* offset and a boolean that's true when buffer has been invalidated.
*/
std::tuple<u8*, u64, bool> Map(u64 size, u64 alignment);
/// Ensures that "size" bytes of memory are available to the GPU, potentially recording a copy.
void Unmap(u64 size);
VkBuffer Handle() const noexcept {
return *buffer;
}
u64 Address() const noexcept {
return 0;
}
private:
struct Watch final {
VKFenceWatch fence;
u64 upper_bound{};
};
/// Creates Vulkan buffer handles committing the required the required memory.
void CreateBuffers(VkBufferUsageFlags usage);
/// Increases the amount of watches available.
void ReserveWatches(std::vector<Watch>& watches, std::size_t grow_size);
void WaitPendingOperations(u64 requested_upper_bound);
const VKDevice& device; ///< Vulkan device manager.
VKScheduler& scheduler; ///< Command scheduler.
vk::Buffer buffer; ///< Mapped buffer.
vk::DeviceMemory memory; ///< Memory allocation.
u64 stream_buffer_size{}; ///< Stream buffer size.
u64 offset{}; ///< Buffer iterator.
u64 mapped_size{}; ///< Size reserved for the current copy.
std::vector<Watch> current_watches; ///< Watches recorded in the current iteration.
std::size_t current_watch_cursor{}; ///< Count of watches, reset on invalidation.
std::optional<std::size_t> invalidation_mark; ///< Number of watches used in the previous cycle.
std::vector<Watch> previous_watches; ///< Watches used in the previous iteration.
std::size_t wait_cursor{}; ///< Last watch being waited for completion.
u64 wait_bound{}; ///< Highest offset being watched for completion.
};
} // namespace Vulkan
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