57 lines
1.4 KiB
C++
57 lines
1.4 KiB
C++
/**
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******************************************************************************
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* Xenia : Xbox 360 Emulator Research Project *
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******************************************************************************
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* Copyright 2014 Ben Vanik. All rights reserved. *
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* Released under the BSD license - see LICENSE in the root for more details. *
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******************************************************************************
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*/
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#ifndef XENIA_GPU_GL4_CIRCULAR_BUFFER_H_
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#define XENIA_GPU_GL4_CIRCULAR_BUFFER_H_
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#include <xenia/gpu/gl4/gl_context.h>
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namespace xe {
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namespace gpu {
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namespace gl4 {
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// TODO(benvanik): uh, make this circular.
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// TODO(benvanik): fences to prevent this from ever flushing.
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class CircularBuffer {
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public:
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CircularBuffer(size_t capacity, size_t alignment = 256);
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~CircularBuffer();
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struct Allocation {
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void* host_ptr;
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GLuint64 gpu_ptr;
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size_t offset;
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size_t length;
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};
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bool Initialize();
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void Shutdown();
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GLuint handle() const { return buffer_; }
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Allocation Acquire(size_t length);
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void Commit(Allocation allocation);
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void WaitUntilClean();
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private:
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size_t capacity_;
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size_t alignment_;
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uintptr_t write_head_;
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GLuint buffer_;
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GLuint64 gpu_base_;
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uint8_t* host_base_;
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};
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} // namespace gl4
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} // namespace gpu
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} // namespace xe
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#endif // XENIA_GPU_GL4_CIRCULAR_BUFFER_H_
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