chromium/components/viz/common/surfaces/subtree_capture_id_allocator.h

// 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.

#ifndef COMPONENTS_VIZ_COMMON_SURFACES_SUBTREE_CAPTURE_ID_ALLOCATOR_H_
#define COMPONENTS_VIZ_COMMON_SURFACES_SUBTREE_CAPTURE_ID_ALLOCATOR_H_

#include <cstdint>

#include "base/sequence_checker.h"
#include "components/viz/common/surfaces/subtree_capture_id.h"

namespace viz {

// Generates `SubtreeCaptureId`s by incrementally increasing the
// `next_subtree_id_`. This method of ID allocation is used for
// aura::Window capture, where IDs need to be process-unique due to the
// potential for Ash layers to move between FrameSinkIds. All IDs allocated by
// this method have zero as the `high` value.
class VIZ_COMMON_EXPORT SubtreeCaptureIdAllocator { … };

}  // namespace viz

#endif  // COMPONENTS_VIZ_COMMON_SURFACES_SUBTREE_CAPTURE_ID_ALLOCATOR_H_