chromium/gpu/ipc/common/gpu_memory_buffer_impl_shared_memory.cc

// 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/40285824): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif

#include "gpu/ipc/common/gpu_memory_buffer_impl_shared_memory.h"

#include <stdint.h>

#include <utility>

#include "base/format_macros.h"
#include "base/functional/bind.h"
#include "base/functional/callback_helpers.h"
#include "base/memory/ptr_util.h"
#include "base/numerics/safe_math.h"
#include "base/process/memory.h"
#include "base/trace_event/memory_allocator_dump_guid.h"
#include "base/trace_event/process_memory_dump.h"
#include "ui/gfx/buffer_format_util.h"
#include "ui/gl/gl_bindings.h"

namespace gpu {

GpuMemoryBufferImplSharedMemory::GpuMemoryBufferImplSharedMemory(
    gfx::GpuMemoryBufferId id,
    const gfx::Size& size,
    gfx::BufferFormat format,
    gfx::BufferUsage usage,
    DestructionCallback callback,
    base::UnsafeSharedMemoryRegion shared_memory_region,
    base::WritableSharedMemoryMapping shared_memory_mapping,
    size_t offset,
    uint32_t stride)
    : … { … }

GpuMemoryBufferImplSharedMemory::~GpuMemoryBufferImplSharedMemory() = default;

// static
std::unique_ptr<GpuMemoryBufferImplSharedMemory>
GpuMemoryBufferImplSharedMemory::Create(gfx::GpuMemoryBufferId id,
                                        const gfx::Size& size,
                                        gfx::BufferFormat format,
                                        gfx::BufferUsage usage,
                                        DestructionCallback callback) { … }

// static
gfx::GpuMemoryBufferHandle
GpuMemoryBufferImplSharedMemory::CreateGpuMemoryBuffer(
    gfx::GpuMemoryBufferId id,
    const gfx::Size& size,
    gfx::BufferFormat format,
    gfx::BufferUsage usage) { … }

// static
std::unique_ptr<GpuMemoryBufferImplSharedMemory>
GpuMemoryBufferImplSharedMemory::CreateFromHandle(
    gfx::GpuMemoryBufferHandle handle,
    const gfx::Size& size,
    gfx::BufferFormat format,
    gfx::BufferUsage usage,
    DestructionCallback callback) { … }

// static
bool GpuMemoryBufferImplSharedMemory::IsUsageSupported(gfx::BufferUsage usage) { … }

// static
bool GpuMemoryBufferImplSharedMemory::IsConfigurationSupported(
    gfx::BufferFormat format,
    gfx::BufferUsage usage) { … }

// static
bool GpuMemoryBufferImplSharedMemory::IsSizeValidForFormat(
    const gfx::Size& size,
    gfx::BufferFormat format) { … }

// static
base::OnceClosure GpuMemoryBufferImplSharedMemory::AllocateForTesting(
    const gfx::Size& size,
    gfx::BufferFormat format,
    gfx::BufferUsage usage,
    gfx::GpuMemoryBufferHandle* handle) { … }

bool GpuMemoryBufferImplSharedMemory::Map() { … }

void* GpuMemoryBufferImplSharedMemory::memory(size_t plane) { … }

void GpuMemoryBufferImplSharedMemory::Unmap() { … }

int GpuMemoryBufferImplSharedMemory::stride(size_t plane) const { … }

gfx::GpuMemoryBufferType GpuMemoryBufferImplSharedMemory::GetType() const { … }

gfx::GpuMemoryBufferHandle GpuMemoryBufferImplSharedMemory::CloneHandle()
    const { … }

void GpuMemoryBufferImplSharedMemory::OnMemoryDump(
    base::trace_event::ProcessMemoryDump* pmd,
    const base::trace_event::MemoryAllocatorDumpGuid& buffer_dump_guid,
    uint64_t tracing_process_id,
    int importance) const { … }

base::UnguessableToken GpuMemoryBufferImplSharedMemory::GetSharedMemoryGUID()
    const { … }

}  // namespace gpu