| // Copyright 2022 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef ASH_DISPLAY_REFRESH_RATE_THROTTLE_CONTROLLER_H_ |
| #define ASH_DISPLAY_REFRESH_RATE_THROTTLE_CONTROLLER_H_ |
| |
| #include "ash/ash_export.h" |
| #include "ash/system/power/power_status.h" |
| #include "base/scoped_observation.h" |
| #include "ui/display/manager/display_configurator.h" |
| |
| namespace ash { |
| |
| // Watches device power state and requests the refresh rate to be throttled |
| // when in a low power state. |
| class ASH_EXPORT RefreshRateThrottleController : public PowerStatus::Observer { |
| public: |
| RefreshRateThrottleController( |
| display::DisplayConfigurator* display_configurator, |
| PowerStatus* power_status); |
| |
| RefreshRateThrottleController(const RefreshRateThrottleController&) = delete; |
| RefreshRateThrottleController& operator=( |
| const RefreshRateThrottleController&) = delete; |
| ~RefreshRateThrottleController() override; |
| |
| // PowerStatus::Observer: |
| void OnPowerStatusChanged() override; |
| |
| private: |
| base::ScopedObservation<ash::PowerStatus, ash::PowerStatus::Observer> |
| power_status_observer_; |
| |
| // Not owned. |
| display::DisplayConfigurator* const display_configurator_; |
| PowerStatus* const power_status_; |
| }; |
| |
| } // namespace ash |
| |
| #endif // ASH_DISPLAY_REFRESH_RATE_THROTTLE_CONTROLLER_H_ |