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
 */
 // own
 #include "blendchanges.h"
 #include "kwinglutils.h"
 
 #include <QDBusConnection>
 #include <QTimer>
 
 namespace KWin
 {
 BlendChanges::BlendChanges()
     : CrossFadeEffect()
 {
     QDBusConnection::sessionBus().registerObject(QStringLiteral("/org/kde/KWin/BlendChanges"),
                                                  QStringLiteral("org.kde.KWin.BlendChanges"),
                                                  this,
                                                  QDBusConnection::ExportAllSlots);
 
     m_timeline.setEasingCurve(QEasingCurve::InOutCubic);
 }
 
 BlendChanges::~BlendChanges() = default;
 
 bool BlendChanges::supported()
 {
     return effects->compositingType() == OpenGLCompositing && effects->animationsSupported();
 }
 
 void KWin::BlendChanges::start(int delay)
 {
     int animationDuration = animationTime(400);
 
     if (!supported() || m_state != Off) {
         return;
     }
     if (effects->hasActiveFullScreenEffect()) {
         return;
     }
 
     const EffectWindowList allWindows = effects->stackingOrder();
     for (auto window : allWindows) {
         if (!window->isFullScreen()) {
             redirect(window);
         }
     }
 
     QTimer::singleShot(delay, this, [this, animationDuration]() {
         m_timeline.setDuration(std::chrono::milliseconds(animationDuration));
         effects->addRepaintFull();
         m_state = Blending;
     });
 
     m_state = ShowingCache;
 }
 
 bool BlendChanges::isActive() const
 {
     return m_state != Off;
 }
 
 void BlendChanges::postPaintScreen()
 {
     if (m_timeline.done()) {
         m_timeline.reset();
         m_state = Off;
 
         const EffectWindowList allWindows = effects->stackingOrder();
         for (auto window : allWindows) {
             unredirect(window);
         }
     }
     effects->addRepaintFull();
 }
 
 void BlendChanges::paintWindow(EffectWindow *w, int mask, QRegion region, WindowPaintData &data)
 {
     data.setCrossFadeProgress(m_timeline.value());
     effects->paintWindow(w, mask, region, data);
 }
 
 void BlendChanges::prePaintScreen(ScreenPrePaintData &data, std::chrono::milliseconds presentTime)
 {
     if (m_state == Off) {
         return;
     }
     if (m_state == Blending) {
         m_timeline.advance(presentTime);
     }
 
     effects->prePaintScreen(data, presentTime);
 }
 
 } // namespace KWin