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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/351564777): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif
#include "gpu/command_buffer/client/test_gpu_memory_buffer_manager.h"
#include <stddef.h>
#include <stdint.h>
#include <utility>
#include "base/check_op.h"
#include "base/memory/raw_ptr.h"
#include "base/numerics/safe_conversions.h"
#include "ui/gfx/buffer_format_util.h"
#include "ui/gfx/gpu_memory_buffer.h"
namespace gpu {
namespace {
class GpuMemoryBufferImpl : public gfx::GpuMemoryBuffer {
public:
GpuMemoryBufferImpl(int id,
const gfx::Size& size,
gfx::BufferFormat format,
base::UnsafeSharedMemoryRegion shared_memory_region,
size_t offset,
size_t stride)
: id_(id),
size_(size),
format_(format),
region_(std::move(shared_memory_region)),
offset_(offset),
stride_(stride),
mapped_(false) {}
~GpuMemoryBufferImpl() override = default;
// Overridden from gfx::GpuMemoryBuffer:
bool Map() override {
DCHECK(!mapped_);
DCHECK_EQ(stride_, gfx::RowSizeForBufferFormat(size_.width(), format_, 0));
mapping_ = region_.MapAt(
0, offset_ + gfx::BufferSizeForBufferFormat(size_, format_));
if (!mapping_.IsValid())
return false;
mapped_ = true;
return true;
}
void* memory(size_t plane) override {
DCHECK(mapped_);
DCHECK_LT(plane, gfx::NumberOfPlanesForLinearBufferFormat(format_));
return reinterpret_cast<uint8_t*>(mapping_.memory()) + offset_ +
gfx::BufferOffsetForBufferFormat(size_, format_, plane);
}
void Unmap() override {
DCHECK(mapped_);
mapping_ = base::WritableSharedMemoryMapping();
mapped_ = false;
}
gfx::Size GetSize() const override { return size_; }
gfx::BufferFormat GetFormat() const override { return format_; }
int stride(size_t plane) const override {
DCHECK_LT(plane, gfx::NumberOfPlanesForLinearBufferFormat(format_));
return base::checked_cast<int>(gfx::RowSizeForBufferFormat(
size_.width(), format_, static_cast<int>(plane)));
}
gfx::GpuMemoryBufferType GetType() const override {
return gfx::SHARED_MEMORY_BUFFER;
}
gfx::GpuMemoryBufferId GetId() const override { return id_; }
gfx::GpuMemoryBufferHandle CloneHandle() const override {
gfx::GpuMemoryBufferHandle handle(region_.Duplicate());
handle.offset = base::checked_cast<uint32_t>(offset_);
handle.stride = base::checked_cast<uint32_t>(stride_);
return handle;
}
void OnMemoryDump(
base::trace_event::ProcessMemoryDump* pmd,
const base::trace_event::MemoryAllocatorDumpGuid& buffer_dump_guid,
uint64_t tracing_process_id,
int importance) const override {}
private:
gfx::GpuMemoryBufferId id_;
const gfx::Size size_;
gfx::BufferFormat format_;
base::UnsafeSharedMemoryRegion region_;
base::WritableSharedMemoryMapping mapping_;
size_t offset_;
size_t stride_;
bool mapped_;
};
class GpuMemoryBufferFromClient : public gfx::GpuMemoryBuffer {
public:
GpuMemoryBufferFromClient(int id, gfx::GpuMemoryBuffer* client_buffer)
: id_(id), client_buffer_(client_buffer) {}
~GpuMemoryBufferFromClient() override = default;
bool Map() override { return client_buffer_->Map(); }
void* memory(size_t plane) override { return client_buffer_->memory(plane); }
void Unmap() override { client_buffer_->Unmap(); }
gfx::Size GetSize() const override { return client_buffer_->GetSize(); }
gfx::BufferFormat GetFormat() const override {
return client_buffer_->GetFormat();
}
int stride(size_t plane) const override {
return client_buffer_->stride(plane);
}
gfx::GpuMemoryBufferId GetId() const override { return id_; }
gfx::GpuMemoryBufferType GetType() const override {
return client_buffer_->GetType();
}
gfx::GpuMemoryBufferHandle CloneHandle() const override {
return client_buffer_->CloneHandle();
}
void OnMemoryDump(
base::trace_event::ProcessMemoryDump* pmd,
const base::trace_event::MemoryAllocatorDumpGuid& buffer_dump_guid,
uint64_t tracing_process_id,
int importance) const override {}
private:
gfx::GpuMemoryBufferId id_;
raw_ptr<gfx::GpuMemoryBuffer> client_buffer_;
};
} // namespace
TestGpuMemoryBufferManager::TestGpuMemoryBufferManager() {}
TestGpuMemoryBufferManager::~TestGpuMemoryBufferManager() {
base::AutoLock hold(lock_);
DCHECK(clients_.empty());
if (parent_gpu_memory_buffer_manager_)
parent_gpu_memory_buffer_manager_->clients_.erase(client_id_);
}
std::unique_ptr<TestGpuMemoryBufferManager>
TestGpuMemoryBufferManager::CreateClientGpuMemoryBufferManager() {
base::AutoLock hold(lock_);
std::unique_ptr<TestGpuMemoryBufferManager> client(
new TestGpuMemoryBufferManager);
client->client_id_ = ++last_client_id_;
client->parent_gpu_memory_buffer_manager_ = this;
clients_[client->client_id_] = client.get();
return client;
}
void TestGpuMemoryBufferManager::OnGpuMemoryBufferDestroyed(
gfx::GpuMemoryBufferId gpu_memory_buffer_id) {
base::AutoLock hold(lock_);
DCHECK(buffers_.find(gpu_memory_buffer_id.id) != buffers_.end());
buffers_.erase(gpu_memory_buffer_id.id);
}
std::unique_ptr<gfx::GpuMemoryBuffer>
TestGpuMemoryBufferManager::CreateGpuMemoryBuffer(
const gfx::Size& size,
gfx::BufferFormat format,
gfx::BufferUsage usage,
gpu::SurfaceHandle surface_handle,
base::WaitableEvent* shutdown_event) {
base::AutoLock hold(lock_);
if (fail_on_create_)
return nullptr;
const size_t buffer_size = gfx::BufferSizeForBufferFormat(size, format);
base::UnsafeSharedMemoryRegion shared_memory_region =
base::UnsafeSharedMemoryRegion::Create(buffer_size);
if (!shared_memory_region.IsValid())
return nullptr;
last_gpu_memory_buffer_id_ += 1;
std::unique_ptr<gfx::GpuMemoryBuffer> result(new GpuMemoryBufferImpl(
last_gpu_memory_buffer_id_, size, format, std::move(shared_memory_region),
0,
base::checked_cast<int>(
gfx::RowSizeForBufferFormat(size.width(), format, 0))));
buffers_[last_gpu_memory_buffer_id_] = result.get();
return result;
}
} // namespace gpu
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