63 lines
1.9 KiB
C++
63 lines
1.9 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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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/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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class SoftwareDisplay final : public mozilla::gfx::VsyncSource::Display
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{
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(SoftwareDisplay)
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public:
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SoftwareDisplay();
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virtual void EnableVsync() override;
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virtual void DisableVsync() override;
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virtual bool IsVsyncEnabled() override;
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bool IsInSoftwareVsyncThread();
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virtual void NotifyVsync(mozilla::TimeStamp aVsyncTimestamp) override;
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virtual mozilla::TimeDuration GetVsyncRate() override;
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void ScheduleNextVsync(mozilla::TimeStamp aVsyncTimestamp);
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void Shutdown() override;
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protected:
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~SoftwareDisplay();
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private:
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mozilla::TimeDuration mVsyncRate;
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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<mozilla::CancelableRunnable> mCurrentVsyncTask; // only access on vsync thread
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bool mVsyncEnabled; // Only access on main thread
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}; // SoftwareDisplay
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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 mozilla::gfx::VsyncSource
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{
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public:
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SoftwareVsyncSource();
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~SoftwareVsyncSource();
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virtual Display& GetGlobalDisplay() override
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{
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MOZ_ASSERT(mGlobalDisplay != nullptr);
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return *mGlobalDisplay;
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}
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private:
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RefPtr<SoftwareDisplay> mGlobalDisplay;
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};
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#endif /* GFX_SOFTWARE_VSYNC_SOURCE_H */
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