50 lines
1.4 KiB
C++
50 lines
1.4 KiB
C++
// Copyright 2022 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <tuple>
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#include "video_core/renderer_opengl/gl_resource_manager.h"
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namespace OpenGL {
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class Driver;
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class OGLStreamBuffer : private NonCopyable {
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public:
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explicit OGLStreamBuffer(Driver& driver, GLenum target, GLsizeiptr size,
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bool prefer_coherent = false);
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~OGLStreamBuffer();
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GLuint GetHandle() const;
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GLsizeiptr GetSize() const;
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/*
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* Allocates a linear chunk of memory in the GPU buffer with at least "size" bytes
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* and the optional alignment requirement.
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* If the buffer is full, the whole buffer is reallocated which invalidates old chunks.
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* The return values are the pointer to the new chunk, the offset within the buffer,
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* and the invalidation flag for previous chunks.
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* The actual used size must be specified on unmapping the chunk.
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*/
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std::tuple<u8*, GLintptr, bool> Map(GLsizeiptr size, GLintptr alignment = 0);
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void Unmap(GLsizeiptr size);
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private:
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OGLBuffer gl_buffer;
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GLenum gl_target;
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bool coherent = false;
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bool persistent = false;
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GLintptr buffer_pos = 0;
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GLsizeiptr buffer_size = 0;
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GLintptr mapped_offset = 0;
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GLsizeiptr mapped_size = 0;
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u8* mapped_ptr = nullptr;
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};
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} // namespace OpenGL
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