vsync_waiter_fallback.h

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// 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_