70 lines
1.7 KiB
C++
70 lines
1.7 KiB
C++
// Copyright 2008 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 <array>
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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 "Common/GL/GLUtil.h"
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namespace OGL
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{
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class StreamBuffer
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{
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public:
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static std::unique_ptr<StreamBuffer> Create(u32 type, u32 size);
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virtual ~StreamBuffer();
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u32 GetGLBufferId() const { return m_buffer; }
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u32 GetSize() const { return m_size; }
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u32 GetCurrentOffset() const { return m_iterator; }
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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*, u32> Map(u32 size) = 0;
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virtual void Unmap(u32 used_size) = 0;
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std::pair<u8*, u32> Map(u32 size, u32 stride)
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{
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u32 padding = m_iterator % stride;
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if (padding)
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{
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m_iterator += stride - padding;
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}
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return Map(size);
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}
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const u32 m_buffer;
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protected:
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StreamBuffer(u32 type, u32 size);
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void CreateFences();
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void DeleteFences();
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void AllocMemory(u32 size);
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const u32 m_buffertype;
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const u32 m_size;
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u32 m_iterator;
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u32 m_used_iterator;
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u32 m_free_iterator;
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private:
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static constexpr int SYNC_POINTS = 16;
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int Slot(u32 x) const { return x >> m_bit_per_slot; }
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const int m_bit_per_slot;
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std::array<GLsync, SYNC_POINTS> m_fences{};
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};
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} // namespace OGL
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