| // Copyright 2019 The Chromium 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 COMPONENTS_EXO_VSYNC_TIMING_MANAGER_H_ |
| #define COMPONENTS_EXO_VSYNC_TIMING_MANAGER_H_ |
| |
| #include <vector> |
| |
| #include "base/macros.h" |
| #include "base/memory/weak_ptr.h" |
| #include "mojo/public/cpp/bindings/binding.h" |
| #include "services/viz/privileged/interfaces/compositing/vsync_parameter_observer.mojom.h" |
| |
| namespace exo { |
| |
| // Multiplexes vsync parameter updates from the display compositor to exo |
| // clients using the zcr_vsync_feedback_v1 protocol. Will maintain an IPC |
| // connection to the display compositor only when necessary. |
| class VSyncTimingManager : public viz::mojom::VSyncParameterObserver { |
| public: |
| // Will be notified about changes in vsync parameters. |
| class Observer { |
| public: |
| virtual ~Observer() = default; |
| |
| virtual void OnUpdateVSyncParameters(base::TimeTicks timebase, |
| base::TimeDelta interval) = 0; |
| }; |
| |
| // Used to setup IPC connection to display compositor. |
| class Delegate { |
| public: |
| virtual ~Delegate() = default; |
| |
| virtual void AddVSyncParameterObserver( |
| viz::mojom::VSyncParameterObserverPtr observer) = 0; |
| }; |
| |
| explicit VSyncTimingManager(Delegate* delegate); |
| ~VSyncTimingManager() override; |
| |
| void AddObserver(Observer* obs); |
| void RemoveObserver(Observer* obs); |
| |
| private: |
| // Overridden from viz::mojom::VSyncParameterObserver: |
| void OnUpdateVSyncParameters(base::TimeTicks timebase, |
| base::TimeDelta interval) override; |
| |
| void InitializeConnection(); |
| void MaybeInitializeConnection(); |
| void OnConnectionError(); |
| |
| Delegate* const delegate_; |
| |
| std::vector<Observer*> observers_; |
| |
| mojo::Binding<viz::mojom::VSyncParameterObserver> binding_{this}; |
| |
| base::WeakPtrFactory<VSyncTimingManager> weak_ptr_factory_{this}; |
| |
| DISALLOW_COPY_AND_ASSIGN(VSyncTimingManager); |
| }; |
| |
| } // namespace exo |
| |
| #endif // COMPONENTS_EXO_VSYNC_TIMING_MANAGER_H_ |