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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <cstring>
#include <memory>
#include <utility>
#include "common/alignment.h"
#include "core/core.h"
#include "video_core/memory_manager.h"
#include "video_core/renderer_opengl/gl_buffer_cache.h"
#include "video_core/renderer_opengl/gl_rasterizer.h"
namespace OpenGL {
CachedBufferEntry::CachedBufferEntry(VAddr cpu_addr, u8* host_ptr, std::size_t size,
std::size_t alignment, GLuint buffer, GLintptr offset)
: RasterizerCacheObject{host_ptr}, cpu_addr{cpu_addr}, size{size}, alignment{alignment},
buffer{buffer}, offset{offset} {}
OGLBufferCache::OGLBufferCache(RasterizerOpenGL& rasterizer, std::size_t size)
: RasterizerCache{rasterizer}, stream_buffer(size, true) {}
std::pair<GLuint, GLintptr> OGLBufferCache::UploadMemory(GPUVAddr gpu_addr, std::size_t size,
std::size_t alignment, bool cache) {
std::lock_guard lock{mutex};
auto& memory_manager = Core::System::GetInstance().GPU().MemoryManager();
const auto& host_ptr{memory_manager.GetPointer(gpu_addr)};
if (!host_ptr) {
// Return a dummy buffer when host_ptr is invalid.
return {0, 0};
}
// Cache management is a big overhead, so only cache entries with a given size.
// TODO: Figure out which size is the best for given games.
cache &= size >= 2048;
if (cache) {
if (auto entry = TryGet(host_ptr); entry) {
if (entry->GetSize() >= size && entry->GetAlignment() == alignment) {
return {entry->GetBuffer(), entry->GetOffset()};
}
Unregister(entry);
}
}
AlignBuffer(alignment);
const GLintptr uploaded_offset = buffer_offset;
std::memcpy(buffer_ptr, host_ptr, size);
buffer_ptr += size;
buffer_offset += size;
const GLuint buffer = stream_buffer.GetHandle();
if (cache) {
const VAddr cpu_addr = *memory_manager.GpuToCpuAddress(gpu_addr);
Register(std::make_shared<CachedBufferEntry>(cpu_addr, host_ptr, size, alignment, buffer,
uploaded_offset));
}
return {buffer, uploaded_offset};
}
std::pair<GLuint, GLintptr> OGLBufferCache::UploadHostMemory(const void* raw_pointer,
std::size_t size,
std::size_t alignment) {
std::lock_guard lock{mutex};
AlignBuffer(alignment);
std::memcpy(buffer_ptr, raw_pointer, size);
const GLintptr uploaded_offset = buffer_offset;
buffer_ptr += size;
buffer_offset += size;
return {stream_buffer.GetHandle(), uploaded_offset};
}
bool OGLBufferCache::Map(std::size_t max_size) {
bool invalidate;
std::tie(buffer_ptr, buffer_offset_base, invalidate) =
stream_buffer.Map(static_cast<GLsizeiptr>(max_size), 4);
buffer_offset = buffer_offset_base;
if (invalidate) {
InvalidateAll();
}
return invalidate;
}
void OGLBufferCache::Unmap() {
stream_buffer.Unmap(buffer_offset - buffer_offset_base);
}
void OGLBufferCache::AlignBuffer(std::size_t alignment) {
// Align the offset, not the mapped pointer
const GLintptr offset_aligned =
static_cast<GLintptr>(Common::AlignUp(static_cast<std::size_t>(buffer_offset), alignment));
buffer_ptr += offset_aligned - buffer_offset;
buffer_offset = offset_aligned;
}
} // namespace OpenGL
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