renderjournal.h

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/*
    SPDX-FileCopyrightText: 2020 Vlad Zahorodnii <vlad.zahorodnii@kde.org>
 
    SPDX-License-Identifier: GPL-2.0-or-later
*/
 
#pragma once
 
#include "effect/globals.h"
 
#include <QElapsedTimer>
#include <QQueue>
 
namespace KWin
{
 
class KWIN_EXPORT RenderJournal
{
public:
    RenderJournal();
 
    void add(std::chrono::nanoseconds renderTime, std::chrono::nanoseconds presentationTimestamp);
 
    std::chrono::nanoseconds result() const;
 
private:
    std::chrono::nanoseconds m_result{0};
    std::chrono::nanoseconds m_variance{0};
    std::optional<std::chrono::nanoseconds> m_lastAdd;
};
 
} // namespace KWin