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128fcdac26
The old way was to use big switch/case statements based on a type of buffer. The new one is to use inheritance. This change prohibits us to change the buffer type while running, but I doubt we'll ever do so. Performance should also be a bit better. Also a nice cleanup. Added some comments about this different kind of buffers.
62 lines
1.4 KiB
C++
62 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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#ifndef STREAMBUFFER_H
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#define STREAMBUFFER_H
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#include <utility>
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#include "VideoCommon.h"
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#include "FramebufferManager.h"
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#include "GLUtil.h"
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// glew < 1.8 doesn't support pinned memory
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#ifndef GLEW_AMD_pinned_memory
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#define GLEW_AMD_pinned_memory glewIsSupported("GL_AMD_pinned_memory")
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#define GL_EXTERNAL_VIRTUAL_MEMORY_BUFFER_AMD 0x9160
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#endif
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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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GLsync *fences;
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};
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}
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#endif // STREAMBUFFER_H
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