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// Copyright 2019 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <deque>
#include <utility>
#include "Common/CommonTypes.h"
#include "VideoBackends/D3D12/Common.h"
namespace DX12
{
class StreamBuffer
{
public:
StreamBuffer();
~StreamBuffer();
bool AllocateBuffer(u32 size);
ID3D12Resource* GetBuffer() const { return m_buffer; }
D3D12_GPU_VIRTUAL_ADDRESS GetGPUPointer() const { return m_gpu_pointer; }
u8* GetHostPointer() const { return m_host_pointer; }
u8* GetCurrentHostPointer() const { return m_host_pointer + m_current_offset; }
D3D12_GPU_VIRTUAL_ADDRESS GetCurrentGPUPointer() const
{
return m_gpu_pointer + m_current_offset;
}
u32 GetSize() const { return m_size; }
u32 GetCurrentOffset() const { return m_current_offset; }
bool ReserveMemory(u32 num_bytes, u32 alignment);
void CommitMemory(u32 final_num_bytes);
private:
void UpdateCurrentFencePosition();
void UpdateGPUPosition();
// Waits for as many fences as needed to allocate num_bytes bytes from the buffer.
bool WaitForClearSpace(u32 num_bytes);
u32 m_size = 0;
u32 m_current_offset = 0;
u32 m_current_gpu_position = 0;
u32 m_last_allocation_size = 0;
ID3D12Resource* m_buffer = nullptr;
D3D12_GPU_VIRTUAL_ADDRESS m_gpu_pointer = {};
u8* m_host_pointer = nullptr;
// List of fences and the corresponding positions in the buffer
std::deque<std::pair<u64, u32>> m_tracked_fences;
};
} // namespace DX12
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