forked from mirrors/gecko-dev
051c921a72
When refresh rate is changed, `DisplayListener` is called. So we restart vsync when refresh rate may be changed. Differential Revision: https://phabricator.services.mozilla.com/D168666
79 lines
2.3 KiB
C++
79 lines
2.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_widget_AndroidVsync_h
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#define mozilla_widget_AndroidVsync_h
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#include "mozilla/DataMutex.h"
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#include "mozilla/java/AndroidVsyncNatives.h"
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#include "mozilla/ThreadSafeWeakPtr.h"
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#include "mozilla/TimeStamp.h"
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namespace mozilla {
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namespace widget {
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class AndroidVsyncSupport;
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/**
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* A thread-safe way to listen to vsync notifications on Android. All methods
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* can be called on any thread.
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* Observers must keep a strong reference to the AndroidVsync instance until
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* they unregister themselves.
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*/
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class AndroidVsync final : public SupportsThreadSafeWeakPtr<AndroidVsync> {
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public:
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MOZ_DECLARE_REFCOUNTED_TYPENAME(AndroidVsync)
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static RefPtr<AndroidVsync> GetInstance();
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~AndroidVsync();
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class Observer {
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public:
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// Will be called on the Java UI thread.
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virtual void OnVsync(const TimeStamp& aTimeStamp) = 0;
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// Will be called on the Java UI thread.
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virtual void OnMaybeUpdateRefreshRate() {}
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// Called when the observer is unregistered, in case it wants to
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// manage its own lifetime.
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virtual void Dispose() {}
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virtual ~Observer() = default;
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};
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// INPUT observers are called before RENDER observers.
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enum ObserverType { INPUT, RENDER };
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void RegisterObserver(Observer* aObserver, ObserverType aType);
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void UnregisterObserver(Observer* aObserver, ObserverType aType);
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void OnMaybeUpdateRefreshRate();
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private:
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friend class AndroidVsyncSupport;
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AndroidVsync();
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// Called by Java, via AndroidVsyncSupport
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void NotifyVsync(int64_t aFrameTimeNanos);
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struct Impl {
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void UpdateObservingVsync();
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nsTArray<Observer*> mInputObservers;
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nsTArray<Observer*> mRenderObservers;
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RefPtr<AndroidVsyncSupport> mSupport;
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java::AndroidVsync::GlobalRef mSupportJava;
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bool mObservingVsync = false;
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};
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DataMutex<Impl> mImpl;
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static StaticDataMutex<ThreadSafeWeakPtr<AndroidVsync>> sInstance;
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};
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} // namespace widget
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} // namespace mozilla
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#endif // mozilla_widget_AndroidVsync_h
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