61 lines
1.5 KiB
C
61 lines
1.5 KiB
C
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// Copyright 2018 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 <utility>
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#include <glad/glad.h>
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#include "common/common_types.h"
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#include "video_core/renderer_opengl/gl_resource_manager.h"
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namespace OpenGL {
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class Device;
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class StateTracker;
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class OGLStreamBuffer : private NonCopyable {
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public:
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explicit OGLStreamBuffer(const Device& device, StateTracker& state_tracker_);
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~OGLStreamBuffer();
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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, and the offset within the buffer.
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* The actual used size must be specified on unmapping the chunk.
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*/
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std::pair<u8*, GLintptr> Map(GLsizeiptr size, GLintptr alignment = 0);
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void Unmap(GLsizeiptr size);
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GLuint Handle() const {
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return gl_buffer.handle;
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}
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u64 Address() const {
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return gpu_address;
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}
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GLsizeiptr Size() const noexcept {
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return BUFFER_SIZE;
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}
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private:
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static constexpr GLsizeiptr BUFFER_SIZE = 256 * 1024 * 1024;
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StateTracker& state_tracker;
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OGLBuffer gl_buffer;
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GLuint64EXT gpu_address = 0;
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GLintptr buffer_pos = 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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