shell/common/vsync_waiter_fallback.h

// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef FLUTTER_SHELL_COMMON_VSYNC_WAITER_FALLBACK_H_
#define FLUTTER_SHELL_COMMON_VSYNC_WAITER_FALLBACK_H_

#include "flutter/fml/macros.h"
#include "flutter/fml/memory/weak_ptr.h"
#include "flutter/fml/time/time_point.h"
#include "flutter/shell/common/vsync_waiter.h"

namespace flutter {

/// A |VsyncWaiter| that will fire at 60 fps irrespective of the vsync.
class VsyncWaiterFallback final : public VsyncWaiter {
 public:
  explicit VsyncWaiterFallback(const TaskRunners& task_runners,
                               bool for_testing = false);

  ~VsyncWaiterFallback() override;

 private:
  fml::TimePoint phase_;
  const bool for_testing_;

  // |VsyncWaiter|
  void AwaitVSync() override;

  FML_DISALLOW_COPY_AND_ASSIGN(VsyncWaiterFallback);
};

}  // namespace flutter

#endif  // FLUTTER_SHELL_COMMON_VSYNC_WAITER_FALLBACK_H_