mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
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89 lines
2.9 KiB
C++
89 lines
2.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_widget_VsyncDispatcher_h
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#define mozilla_widget_VsyncDispatcher_h
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#include "base/message_loop.h"
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#include "mozilla/Mutex.h"
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#include "nsISupportsImpl.h"
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#include "nsTArray.h"
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#include "ThreadSafeRefcountingWithMainThreadDestruction.h"
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class MessageLoop;
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namespace mozilla {
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class TimeStamp;
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namespace layers {
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class CompositorVsyncObserver;
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}
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// Controls how and when to enable/disable vsync.
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class VsyncSource
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{
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public:
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(VsyncSource)
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virtual void EnableVsync() = 0;
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virtual void DisableVsync() = 0;
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virtual bool IsVsyncEnabled() = 0;
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protected:
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virtual ~VsyncSource() {}
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}; // VsyncSource
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class VsyncObserver
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{
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// Must be destroyed on main thread since the compositor is as well
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING_WITH_MAIN_THREAD_DESTRUCTION(VsyncObserver)
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public:
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// The method called when a vsync occurs. Return true if some work was done.
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// Vsync notifications will occur on the hardware vsync thread
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virtual bool NotifyVsync(TimeStamp aVsyncTimestamp) = 0;
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protected:
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VsyncObserver() {}
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virtual ~VsyncObserver() {}
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}; // VsyncObserver
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// VsyncDispatcher is used to dispatch vsync events to the registered observers.
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class VsyncDispatcher
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{
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(VsyncDispatcher)
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public:
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static VsyncDispatcher* GetInstance();
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// Called on the vsync thread when a hardware vsync occurs
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// The aVsyncTimestamp can mean different things depending on the platform:
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// b2g - The vsync timestamp of the previous frame that was just displayed
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// OSX - The vsync timestamp of the upcoming frame
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// TODO: Windows / Linux. DOCUMENT THIS WHEN IMPLEMENTING ON THOSE PLATFORMS
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// Android: TODO
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void NotifyVsync(TimeStamp aVsyncTimestamp);
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void SetVsyncSource(VsyncSource* aVsyncSource);
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// Compositor vsync observers must be added/removed on the compositor thread
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void AddCompositorVsyncObserver(VsyncObserver* aVsyncObserver);
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void RemoveCompositorVsyncObserver(VsyncObserver* aVsyncObserver);
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private:
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VsyncDispatcher();
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virtual ~VsyncDispatcher();
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void DispatchTouchEvents(bool aNotifiedCompositors, TimeStamp aVsyncTime);
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// Called on the vsync thread. Returns true if observers were notified
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bool NotifyVsyncObservers(TimeStamp aVsyncTimestamp, nsTArray<nsRefPtr<VsyncObserver>>& aObservers);
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// Can have multiple compositors. On desktop, this is 1 compositor per window
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Mutex mCompositorObserverLock;
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nsTArray<nsRefPtr<VsyncObserver>> mCompositorObservers;
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nsRefPtr<VsyncSource> mVsyncSource;
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}; // VsyncDispatcher
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} // namespace mozilla
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#endif // __mozilla_widget_VsyncDispatcher_h
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