mirror of
https://github.com/dolphin-emu/dolphin.git
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02a4e3d70f
The size of the buffer is now power of 2, so we can use a shift instead of a division. This was at about 2% of the global CPU usage.
56 lines
1.4 KiB
C++
56 lines
1.4 KiB
C++
// Copyright 2013 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 <utility>
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#include "VideoBackends/OGL/FramebufferManager.h"
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#include "VideoBackends/OGL/GLUtil.h"
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#include "VideoCommon/VideoCommon.h"
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namespace OGL
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{
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class StreamBuffer {
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public:
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static StreamBuffer* Create(u32 type, size_t size);
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virtual ~StreamBuffer();
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/* This mapping function will return a pair of:
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* - the pointer to the mapped buffer
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* - the offset into the real gpu buffer (always multiple of stride)
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* On mapping, the maximum of size for allocation has to be set.
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* The size really pushed into this fifo only has to be known on Unmapping.
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* Mapping invalidates the current buffer content,
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* so it isn't allowed to access the old content any more.
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*/
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virtual std::pair<u8*, size_t> Map(size_t size, u32 stride = 0) = 0;
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virtual void Unmap(size_t used_size) = 0;
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const u32 m_buffer;
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protected:
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StreamBuffer(u32 type, size_t size);
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void CreateFences();
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void DeleteFences();
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void AllocMemory(size_t size);
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void Align(u32 stride);
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const u32 m_buffertype;
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const size_t m_size;
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size_t m_iterator;
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size_t m_used_iterator;
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size_t m_free_iterator;
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private:
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static const int SYNC_POINTS = 16;
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inline int SLOT(size_t x) const { return x >> m_bit_per_slot; }
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const int m_bit_per_slot;
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GLsync fences[SYNC_POINTS];
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};
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}
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