dolphin/Source/Core/VideoBackends/Vulkan/StreamBuffer.h

62 lines
1.9 KiB
C++

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