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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* 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 {
public:
SoftwareDisplay();
void EnableVsync() override;
void DisableVsync() override;
bool IsVsyncEnabled() override;
bool IsInSoftwareVsyncThread();
void NotifyVsync(const mozilla::TimeStamp& aVsyncTimestamp,
const mozilla::TimeStamp& aOutputTimestamp) override;
mozilla::TimeDuration GetVsyncRate() override;
void ScheduleNextVsync(mozilla::TimeStamp aVsyncTimestamp);
void Shutdown() override;
virtual ~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();
virtual ~SoftwareVsyncSource();
Display& GetGlobalDisplay() override {
MOZ_ASSERT(mGlobalDisplay != nullptr);
return *mGlobalDisplay;
}
private:
RefPtr<SoftwareDisplay> mGlobalDisplay;
};
#endif /* GFX_SOFTWARE_VSYNC_SOURCE_H */