File indexing completed on 2025-03-23 11:13:33

 /*
     SPDX-FileCopyrightText: 2020 Vlad Zahorodnii <vlad.zahorodnii@kde.org>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #pragma once
 
 #include "kwinglobals.h"
 
 #include <QElapsedTimer>
 #include <QQueue>
 
 namespace KWin
 {
 
 /**
  * The RenderJournal class measures how long it takes to render frames and estimates how
  * long it will take to render the next frame.
  */
 class KWIN_EXPORT RenderJournal
 {
 public:
     RenderJournal();
 
     /**
      * This function must be called before starting rendering a new frame.
      */
     void beginFrame();
 
     /**
      * This function must be called after finishing rendering a frame.
      */
     void endFrame();
 
     /**
      * Returns the maximum estimated amount of time that it takes to render a single frame.
      */
     std::chrono::nanoseconds maximum() const;
 
     /**
      * Returns the minimum estimated amount of time that it takes to render a single frame.
      */
     std::chrono::nanoseconds minimum() const;
 
     /**
      * Returns the average estimated amount of time that it takes to render a single frame.
      */
     std::chrono::nanoseconds average() const;
 
 private:
     QElapsedTimer m_timer;
     QQueue<std::chrono::nanoseconds> m_log;
     int m_size = 15;
 };
 
 } // namespace KWin