1// Copyright 2013 The Flutter Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef FLUTTER_SHELL_COMMON_DISPLAY_MANAGER_H_
6#define FLUTTER_SHELL_COMMON_DISPLAY_MANAGER_H_
7
8#include <mutex>
9#include <vector>
10
11#include "flutter/shell/common/display.h"
12
13namespace flutter {
14
15/// Manages lifecycle of the connected displays. This class is thread-safe.
16class DisplayManager {
17 public:
18 DisplayManager();
19
20 ~DisplayManager();
21
22 /// Returns the display refresh rate of the main display. In cases where there
23 /// is only one display connected, it will return that. We do not yet support
24 /// cases where there are multiple displays.
25 ///
26 /// When there are no registered displays, it returns
27 /// `kUnknownDisplayRefreshRate`.
28 double GetMainDisplayRefreshRate() const;
29
30 /// Handles the display updates.
31 void HandleDisplayUpdates(std::vector<std::unique_ptr<Display>> displays);
32
33 private:
34 /// Guards `displays_` vector.
35 mutable std::mutex displays_mutex_;
36 std::vector<std::unique_ptr<Display>> displays_;
37};
38
39} // namespace flutter
40
41#endif // FLUTTER_SHELL_COMMON_DISPLAY_MANAGER_H_
42

source code of flutter_engine/flutter/shell/common/display_manager.h