forked from suyu/suyu
108 lines
3.2 KiB
C++
108 lines
3.2 KiB
C++
// Copyright 2018 yuzu 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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#include <cstring>
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#include <memory>
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#include "common/alignment.h"
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#include "core/core.h"
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#include "core/memory.h"
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#include "video_core/renderer_opengl/gl_buffer_cache.h"
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#include "video_core/renderer_opengl/gl_rasterizer.h"
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namespace OpenGL {
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OGLBufferCache::OGLBufferCache(RasterizerOpenGL& rasterizer, std::size_t size)
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: RasterizerCache{rasterizer}, stream_buffer(size, true) {}
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GLintptr OGLBufferCache::UploadMemory(Tegra::GPUVAddr gpu_addr, std::size_t size,
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std::size_t alignment, bool cache) {
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auto& memory_manager = Core::System::GetInstance().GPU().MemoryManager();
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const auto cpu_addr{memory_manager.GpuToCpuAddress(gpu_addr)};
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ASSERT_MSG(cpu_addr, "Invalid GPU address");
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// Cache management is a big overhead, so only cache entries with a given size.
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// TODO: Figure out which size is the best for given games.
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cache &= size >= 2048;
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if (cache) {
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auto entry = TryGet(*cpu_addr);
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if (entry) {
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if (entry->size >= size && entry->alignment == alignment) {
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return entry->offset;
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}
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Unregister(entry);
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}
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}
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AlignBuffer(alignment);
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const GLintptr uploaded_offset = buffer_offset;
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Memory::ReadBlock(*cpu_addr, buffer_ptr, size);
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buffer_ptr += size;
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buffer_offset += size;
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if (cache) {
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auto entry = std::make_shared<CachedBufferEntry>();
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entry->offset = uploaded_offset;
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entry->size = size;
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entry->alignment = alignment;
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entry->addr = *cpu_addr;
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Register(entry);
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}
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return uploaded_offset;
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}
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GLintptr OGLBufferCache::UploadHostMemory(const void* raw_pointer, std::size_t size,
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std::size_t alignment) {
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AlignBuffer(alignment);
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std::memcpy(buffer_ptr, raw_pointer, size);
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const GLintptr uploaded_offset = buffer_offset;
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buffer_ptr += size;
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buffer_offset += size;
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return uploaded_offset;
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}
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std::tuple<u8*, GLintptr> OGLBufferCache::ReserveMemory(std::size_t size, std::size_t alignment) {
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AlignBuffer(alignment);
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u8* const uploaded_ptr = buffer_ptr;
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const GLintptr uploaded_offset = buffer_offset;
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buffer_ptr += size;
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buffer_offset += size;
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return std::make_tuple(uploaded_ptr, uploaded_offset);
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}
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bool OGLBufferCache::Map(std::size_t max_size) {
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bool invalidate;
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std::tie(buffer_ptr, buffer_offset_base, invalidate) =
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stream_buffer.Map(static_cast<GLsizeiptr>(max_size), 4);
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buffer_offset = buffer_offset_base;
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if (invalidate) {
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InvalidateAll();
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}
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return invalidate;
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}
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void OGLBufferCache::Unmap() {
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stream_buffer.Unmap(buffer_offset - buffer_offset_base);
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}
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GLuint OGLBufferCache::GetHandle() const {
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return stream_buffer.GetHandle();
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}
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void OGLBufferCache::AlignBuffer(std::size_t alignment) {
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// Align the offset, not the mapped pointer
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const GLintptr offset_aligned =
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static_cast<GLintptr>(Common::AlignUp(static_cast<std::size_t>(buffer_offset), alignment));
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buffer_ptr += offset_aligned - buffer_offset;
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buffer_offset = offset_aligned;
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}
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} // namespace OpenGL
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