1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
// 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_H_
#define COMPONENTS_VIZ_COMMON_SURFACES_SUBTREE_CAPTURE_ID_H_
#include <cstdint>
#include <string>
#include <utility>
#include "base/token.h"
#include "components/viz/common/viz_common_export.h"
namespace viz {
// A SubtreeCaptureId uniquely identifies a layer subtree within a
// CompositorFrameSink, which can be captured independently from the root
// CompositorFrameSink by the FrameSinkVideoCapturer.
//
// For aura::Window capture, use the SubtreeCaptureIdAllocator to allocate a
// valid instance of this class. For Element level capture, use the base::Token
// associated with the element undergoing capture to construct this class.
class VIZ_COMMON_EXPORT SubtreeCaptureId {
public:
constexpr SubtreeCaptureId() = default;
constexpr explicit SubtreeCaptureId(base::Token subtree_id)
: subtree_id_(std::move(subtree_id)) {}
constexpr SubtreeCaptureId(const SubtreeCaptureId&) = default;
SubtreeCaptureId& operator=(const SubtreeCaptureId&) = default;
~SubtreeCaptureId() = default;
constexpr bool is_valid() const { return !subtree_id_.is_zero(); }
constexpr const base::Token& subtree_id() const { return subtree_id_; }
friend std::strong_ordering operator<=>(const SubtreeCaptureId&,
const SubtreeCaptureId&) = default;
std::string ToString() const;
private:
base::Token subtree_id_;
};
} // namespace viz
#endif // COMPONENTS_VIZ_COMMON_SURFACES_SUBTREE_CAPTURE_ID_H_
|
