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1714c056dd
XrandrSoftwareVsyncSource changes the rate on the main thread but reads it on the software vsync thread. Differential Revision: https://phabricator.services.mozilla.com/D144377
53 lines
1.8 KiB
C++
53 lines
1.8 KiB
C++
/* -*- Mode: C++; tab-width: 20; 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
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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#ifndef GFX_SOFTWARE_VSYNC_SOURCE_H
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#define GFX_SOFTWARE_VSYNC_SOURCE_H
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#include "mozilla/DataMutex.h"
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#include "mozilla/Monitor.h"
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#include "mozilla/RefPtr.h"
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#include "mozilla/TimeStamp.h"
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#include "base/thread.h"
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#include "nsISupportsImpl.h"
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#include "VsyncSource.h"
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namespace mozilla::gfx {
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// Fallback option to use a software timer to mimic vsync. Useful for gtests
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// To mimic a hardware vsync thread, we create a dedicated software timer
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// vsync thread.
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class SoftwareVsyncSource : public VsyncSource {
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public:
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explicit SoftwareVsyncSource(const TimeDuration& aInitialVsyncRate);
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virtual ~SoftwareVsyncSource();
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void EnableVsync() override;
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void DisableVsync() override;
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bool IsVsyncEnabled() override;
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bool IsInSoftwareVsyncThread();
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void NotifyVsync(const TimeStamp& aVsyncTimestamp,
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const TimeStamp& aOutputTimestamp) override;
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TimeDuration GetVsyncRate() override;
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void ScheduleNextVsync(TimeStamp aVsyncTimestamp);
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void Shutdown() override;
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// Can be called on any thread
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void SetVsyncRate(const TimeDuration& aNewRate);
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protected:
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// Use a chromium thread because nsITimers* fire on the main thread
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base::Thread* mVsyncThread;
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RefPtr<CancelableRunnable> mCurrentVsyncTask; // only access on vsync thread
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bool mVsyncEnabled; // Only access on main thread
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private:
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DataMutex<TimeDuration> mVsyncRate; // can be accessed on any thread
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};
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} // namespace mozilla::gfx
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#endif /* GFX_SOFTWARE_VSYNC_SOURCE_H */
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