forked from mirrors/gecko-dev
758ee8a36c
This allows adding another vsync listener that gets called before the regular VsyncSource. And it allows adding the listener on the Java UI thread. The existing infrastructure is pretty adamant about being used on the main thread. Differential Revision: https://phabricator.services.mozilla.com/D96797
75 lines
2.1 KiB
C++
75 lines
2.1 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_THREADSAFEWEAKREFERENCE_TYPENAME(AndroidVsync)
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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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};
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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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TimeDuration GetVsyncRate();
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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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TimeDuration mVsyncDuration;
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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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