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

66 lines
1.5 KiB
C++

// Copyright 2013 Dolphin Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.
#pragma once
#include <utility>
#include "VideoBackends/OGL/FramebufferManager.h"
#include "VideoBackends/OGL/GLUtil.h"
#include "VideoCommon/VideoCommon.h"
namespace OGL
{
class StreamBuffer {
public:
static StreamBuffer* Create(u32 type, u32 size);
virtual ~StreamBuffer();
/* This mapping function will return a pair of:
* - the pointer to the mapped buffer
* - the offset into the real gpu buffer (always multiple of stride)
* On mapping, the maximum of size for allocation has to be set.
* The size really pushed into this fifo only has to be known on Unmapping.
* Mapping invalidates the current buffer content,
* so it isn't allowed to access the old content any more.
*/
virtual std::pair<u8*, u32> Map(u32 size) = 0;
virtual void Unmap(u32 used_size) = 0;
inline std::pair<u8*, u32> Map(u32 size, u32 stride)
{
u32 padding = m_iterator % stride;
if (padding)
{
m_iterator += stride - padding;
}
return Map(size);
}
const u32 m_buffer;
protected:
StreamBuffer(u32 type, u32 size);
void CreateFences();
void DeleteFences();
void AllocMemory(u32 size);
const u32 m_buffertype;
const u32 m_size;
u32 m_iterator;
u32 m_used_iterator;
u32 m_free_iterator;
private:
static const int SYNC_POINTS = 16;
inline int SLOT(u32 x) const { return x >> m_bit_per_slot; }
const int m_bit_per_slot;
GLsync fences[SYNC_POINTS];
};
}