chromium/gpu/command_buffer/service/shared_memory_region_wrapper.cc

// Copyright 2020 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/command_buffer/service/shared_memory_region_wrapper.h"

#include "base/logging.h"
#include "base/numerics/checked_math.h"
#include "base/system/sys_info.h"
#include "ui/gfx/buffer_format_util.h"
#include "ui/gfx/gpu_memory_buffer.h"

namespace gpu {
namespace {

// Validate that |stride| will work for pixels with |size| and |format|.
bool ValidateStride(const gfx::Size size,
                    gfx::BufferFormat format,
                    uint32_t stride) { … }

}  // namespace

SharedMemoryRegionWrapper::SharedMemoryRegionWrapper() = default;
SharedMemoryRegionWrapper::SharedMemoryRegionWrapper(
    SharedMemoryRegionWrapper&& other) = default;
SharedMemoryRegionWrapper& SharedMemoryRegionWrapper::operator=(
    SharedMemoryRegionWrapper&& other) = default;
SharedMemoryRegionWrapper::~SharedMemoryRegionWrapper() = default;

bool SharedMemoryRegionWrapper::Initialize(
    const gfx::GpuMemoryBufferHandle& handle,
    const gfx::Size& size,
    gfx::BufferFormat format) { … }

bool SharedMemoryRegionWrapper::IsValid() const { … }

uint8_t* SharedMemoryRegionWrapper::GetMemory(int plane_index) const { … }

size_t SharedMemoryRegionWrapper::GetStride(int plane_index) const { … }

SkPixmap SharedMemoryRegionWrapper::MakePixmapForPlane(const SkImageInfo& info,
                                                       int plane_index) const { … }

const base::UnguessableToken& SharedMemoryRegionWrapper::GetMappingGuid()
    const { … }

}  // namespace gpu