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58 lines
1.6 KiB
C++
58 lines
1.6 KiB
C++
// Copyright 2016 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#pragma once
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#include <cstddef>
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#include <deque>
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#include <memory>
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#include <utility>
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#include "Common/CommonTypes.h"
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#include "VideoBackends/Vulkan/Constants.h"
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namespace Vulkan
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{
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class StreamBuffer
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{
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public:
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StreamBuffer(VkBufferUsageFlags usage, u32 size);
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~StreamBuffer();
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VkBuffer GetBuffer() const { return m_buffer; }
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VkDeviceMemory GetDeviceMemory() const { return m_memory; }
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u8* GetHostPointer() const { return m_host_pointer; }
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u8* GetCurrentHostPointer() const { return m_host_pointer + m_current_offset; }
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u32 GetCurrentSize() const { return m_size; }
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u32 GetCurrentOffset() const { return m_current_offset; }
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bool ReserveMemory(u32 num_bytes, u32 alignment);
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void CommitMemory(u32 final_num_bytes);
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static std::unique_ptr<StreamBuffer> Create(VkBufferUsageFlags usage, u32 size);
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private:
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bool AllocateBuffer();
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void UpdateCurrentFencePosition();
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void OnFenceSignaled(VkFence fence);
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// Waits for as many fences as needed to allocate num_bytes bytes from the buffer.
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bool WaitForClearSpace(u32 num_bytes);
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VkBufferUsageFlags m_usage;
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u32 m_size;
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u32 m_current_offset = 0;
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u32 m_current_gpu_position = 0;
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u32 m_last_allocation_size = 0;
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VkBuffer m_buffer = VK_NULL_HANDLE;
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VkDeviceMemory m_memory = VK_NULL_HANDLE;
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u8* m_host_pointer = nullptr;
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// List of fences and the corresponding positions in the buffer
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std::deque<std::pair<VkFence, u32>> m_tracked_fences;
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bool m_coherent_mapping = false;
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};
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} // namespace Vulkan
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