| // Copyright 2020 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 UI_COMPOSITOR_THROUGHPUT_TRACKER_H_ |
| #define UI_COMPOSITOR_THROUGHPUT_TRACKER_H_ |
| |
| #include "base/callback_forward.h" |
| #include "base/memory/weak_ptr.h" |
| #include "ui/compositor/compositor_export.h" |
| #include "ui/compositor/throughput_tracker_host.h" |
| |
| namespace ui { |
| |
| class Compositor; |
| class ThroughputTrackerHost; |
| |
| // A class to track the throughput of Compositor. The tracking is identified by |
| // an id. The id is passed into impl side and be used as the sequence id to |
| // create and stop a kCustom typed cc::FrameSequenceTracker. The class is |
| // move-only to have only one holder of the id. When ThroughputTracker is |
| // destroyed with an active tracking, the tracking will be canceled and report |
| // callback will not be invoked. |
| class COMPOSITOR_EXPORT ThroughputTracker { |
| public: |
| using TrackerId = ThroughputTrackerHost::TrackerId; |
| |
| // Move only. |
| ThroughputTracker(ThroughputTracker&& other); |
| ThroughputTracker& operator=(ThroughputTracker&& other); |
| |
| ~ThroughputTracker(); |
| |
| // Starts tracking Compositor and provides a callback for reporting. The |
| // throughput data collection starts after the next commit. |
| void Start(ThroughputTrackerHost::ReportCallback callback); |
| |
| // Stops tracking. The supplied callback will be invoked when the data |
| // collection finishes after the next frame presentation. Note that no data |
| // will be reported if Stop() is not called, |
| void Stop(); |
| |
| // Cancels tracking. The supplied callback will not be invoked. |
| void Cancel(); |
| |
| private: |
| friend class Compositor; |
| |
| // Private since it should only be created via Compositor's |
| // RequestNewThroughputTracker call. |
| ThroughputTracker(TrackerId id, base::WeakPtr<ThroughputTrackerHost> host); |
| |
| static const TrackerId kInvalidId = 0u; |
| TrackerId id_ = kInvalidId; |
| base::WeakPtr<ThroughputTrackerHost> host_; |
| bool started_ = false; |
| }; |
| |
| } // namespace ui |
| |
| #endif // UI_COMPOSITOR_THROUGHPUT_TRACKER_H_ |