96 lines
2.4 KiB
C++
Executable File
96 lines
2.4 KiB
C++
Executable File
// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#pragma once
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#include <array>
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#include <optional>
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#include <span>
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#include <utility>
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#include <vector>
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#include <glad/glad.h>
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#include "common/common_types.h"
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#include "common/literals.h"
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#include "video_core/renderer_opengl/gl_resource_manager.h"
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namespace OpenGL {
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using namespace Common::Literals;
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struct StagingBufferMap {
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~StagingBufferMap();
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std::span<u8> mapped_span;
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size_t offset = 0;
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OGLSync* sync;
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GLuint buffer;
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};
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struct StagingBuffers {
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explicit StagingBuffers(GLenum storage_flags_, GLenum map_flags_);
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~StagingBuffers();
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StagingBufferMap RequestMap(size_t requested_size, bool insert_fence);
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size_t RequestBuffer(size_t requested_size);
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std::optional<size_t> FindBuffer(size_t requested_size);
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std::vector<OGLSync> syncs;
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std::vector<OGLBuffer> buffers;
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std::vector<u8*> maps;
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std::vector<size_t> sizes;
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std::vector<size_t> sync_indices;
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GLenum storage_flags;
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GLenum map_flags;
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size_t current_sync_index = 0;
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};
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class StreamBuffer {
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static constexpr size_t STREAM_BUFFER_SIZE = 64_MiB;
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static constexpr size_t NUM_SYNCS = 16;
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static constexpr size_t REGION_SIZE = STREAM_BUFFER_SIZE / NUM_SYNCS;
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static constexpr size_t MAX_ALIGNMENT = 256;
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static_assert(STREAM_BUFFER_SIZE % MAX_ALIGNMENT == 0);
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static_assert(STREAM_BUFFER_SIZE % NUM_SYNCS == 0);
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static_assert(REGION_SIZE % MAX_ALIGNMENT == 0);
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public:
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explicit StreamBuffer();
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[[nodiscard]] std::pair<std::span<u8>, size_t> Request(size_t size) noexcept;
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[[nodiscard]] GLuint Handle() const noexcept {
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return buffer.handle;
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}
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private:
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[[nodiscard]] static size_t Region(size_t offset) noexcept {
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return offset / REGION_SIZE;
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}
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size_t iterator = 0;
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size_t used_iterator = 0;
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size_t free_iterator = 0;
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u8* mapped_pointer = nullptr;
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OGLBuffer buffer;
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std::array<OGLSync, NUM_SYNCS> fences;
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};
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class StagingBufferPool {
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public:
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StagingBufferPool() = default;
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~StagingBufferPool() = default;
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StagingBufferMap RequestUploadBuffer(size_t size);
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StagingBufferMap RequestDownloadBuffer(size_t size);
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private:
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StagingBuffers upload_buffers{GL_MAP_WRITE_BIT, GL_MAP_WRITE_BIT | GL_MAP_FLUSH_EXPLICIT_BIT};
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StagingBuffers download_buffers{GL_MAP_READ_BIT | GL_CLIENT_STORAGE_BIT, GL_MAP_READ_BIT};
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};
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} // namespace OpenGL
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