File indexing completed on 2025-12-07 12:25:07

 /*
     KWin - the KDE window manager
     This file is part of the KDE project.
 
     SPDX-FileCopyrightText: 2022 David Edmundson <davidedmundson@kde.org>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 #pragma once
 #include <chrono>
 #include <kwinoffscreeneffect.h>
 #include <kwineffects.h>
 
 namespace KWin
 {
 
 class BlendChanges : public CrossFadeEffect
 {
     Q_OBJECT
 
 public:
     BlendChanges();
     ~BlendChanges() override;
 
     static bool supported();
 
     // Effect interface
     void prePaintScreen(ScreenPrePaintData &data, std::chrono::milliseconds presentTime) override;
     void postPaintScreen() override;
     void paintWindow(EffectWindow *w, int mask, QRegion region, WindowPaintData &data) override;
 
     bool isActive() const override;
 
     int requestedEffectChainPosition() const override
     {
         return 80;
     }
 
 public Q_SLOTS:
     /**
      * Called from DBus, this should be called before triggering any changes
      * delay (ms) refers to how long to keep the current frame before starting a crossfade
      * We should expect all clients to have repainted by the time this expires
      */
     void start(int delay = 300);
 
 private:
     TimeLine m_timeline;
     enum State {
         Off,
         ShowingCache,
         Blending
     };
     State m_state = Off;
 };
 
 } // namespace KWin