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Diffstat (limited to '')
-rw-r--r-- | src/video_core/renderer_opengl/gl_staging_buffer_pool.h | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/src/video_core/renderer_opengl/gl_staging_buffer_pool.h b/src/video_core/renderer_opengl/gl_staging_buffer_pool.h new file mode 100644 index 000000000..60f72d3a0 --- /dev/null +++ b/src/video_core/renderer_opengl/gl_staging_buffer_pool.h @@ -0,0 +1,95 @@ +// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project +// SPDX-License-Identifier: GPL-2.0-or-later + +#pragma once + +#include <array> +#include <optional> +#include <span> +#include <utility> +#include <vector> + +#include <glad/glad.h> + +#include "common/common_types.h" +#include "common/literals.h" +#include "video_core/renderer_opengl/gl_resource_manager.h" + +namespace OpenGL { + +using namespace Common::Literals; + +struct StagingBufferMap { + ~StagingBufferMap(); + + std::span<u8> mapped_span; + size_t offset = 0; + OGLSync* sync; + GLuint buffer; +}; + +struct StagingBuffers { + explicit StagingBuffers(GLenum storage_flags_, GLenum map_flags_); + ~StagingBuffers(); + + StagingBufferMap RequestMap(size_t requested_size, bool insert_fence); + + size_t RequestBuffer(size_t requested_size); + + std::optional<size_t> FindBuffer(size_t requested_size); + + std::vector<OGLSync> syncs; + std::vector<OGLBuffer> buffers; + std::vector<u8*> maps; + std::vector<size_t> sizes; + std::vector<size_t> sync_indices; + GLenum storage_flags; + GLenum map_flags; + size_t current_sync_index = 0; +}; + +class StreamBuffer { + static constexpr size_t STREAM_BUFFER_SIZE = 64_MiB; + static constexpr size_t NUM_SYNCS = 16; + static constexpr size_t REGION_SIZE = STREAM_BUFFER_SIZE / NUM_SYNCS; + static constexpr size_t MAX_ALIGNMENT = 256; + static_assert(STREAM_BUFFER_SIZE % MAX_ALIGNMENT == 0); + static_assert(STREAM_BUFFER_SIZE % NUM_SYNCS == 0); + static_assert(REGION_SIZE % MAX_ALIGNMENT == 0); + +public: + explicit StreamBuffer(); + + [[nodiscard]] std::pair<std::span<u8>, size_t> Request(size_t size) noexcept; + + [[nodiscard]] GLuint Handle() const noexcept { + return buffer.handle; + } + +private: + [[nodiscard]] static size_t Region(size_t offset) noexcept { + return offset / REGION_SIZE; + } + + size_t iterator = 0; + size_t used_iterator = 0; + size_t free_iterator = 0; + u8* mapped_pointer = nullptr; + OGLBuffer buffer; + std::array<OGLSync, NUM_SYNCS> fences; +}; + +class StagingBufferPool { +public: + StagingBufferPool() = default; + ~StagingBufferPool() = default; + + StagingBufferMap RequestUploadBuffer(size_t size); + StagingBufferMap RequestDownloadBuffer(size_t size); + +private: + StagingBuffers upload_buffers{GL_MAP_WRITE_BIT, GL_MAP_WRITE_BIT | GL_MAP_FLUSH_EXPLICIT_BIT}; + StagingBuffers download_buffers{GL_MAP_READ_BIT | GL_CLIENT_STORAGE_BIT, GL_MAP_READ_BIT}; +}; + +} // namespace OpenGL |