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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

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Roy Tam 2018-01-19 03:59:58 +08:00
commit dcd9973243
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62
gfx/thebes/SoftwareVsyncSource.h Normal file
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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#ifndef GFX_SOFTWARE_VSYNC_SOURCE_H
#define GFX_SOFTWARE_VSYNC_SOURCE_H
#include "mozilla/Monitor.h"
#include "mozilla/RefPtr.h"
#include "mozilla/TimeStamp.h"
#include "base/thread.h"
#include "nsISupportsImpl.h"
#include "VsyncSource.h"
class SoftwareDisplay final : public mozilla::gfx::VsyncSource::Display
{
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(SoftwareDisplay)
public:
SoftwareDisplay();
virtual void EnableVsync() override;
virtual void DisableVsync() override;
virtual bool IsVsyncEnabled() override;
bool IsInSoftwareVsyncThread();
virtual void NotifyVsync(mozilla::TimeStamp aVsyncTimestamp) override;
virtual mozilla::TimeDuration GetVsyncRate() override;
void ScheduleNextVsync(mozilla::TimeStamp aVsyncTimestamp);
void Shutdown() override;
protected:
~SoftwareDisplay();
private:
mozilla::TimeDuration mVsyncRate;
// Use a chromium thread because nsITimers* fire on the main thread
base::Thread* mVsyncThread;
RefPtr<mozilla::CancelableRunnable> mCurrentVsyncTask; // only access on vsync thread
bool mVsyncEnabled; // Only access on main thread
}; // SoftwareDisplay
// Fallback option to use a software timer to mimic vsync. Useful for gtests
// To mimic a hardware vsync thread, we create a dedicated software timer
// vsync thread.
class SoftwareVsyncSource : public mozilla::gfx::VsyncSource
{
public:
SoftwareVsyncSource();
~SoftwareVsyncSource();
virtual Display& GetGlobalDisplay() override
{
MOZ_ASSERT(mGlobalDisplay != nullptr);
return *mGlobalDisplay;
}
private:
RefPtr<SoftwareDisplay> mGlobalDisplay;
};
#endif /* GFX_SOFTWARE_VSYNC_SOURCE_H */