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

 /*
     SPDX-FileCopyrightText: 2021 Vlad Zahorodnii <vlad.zahorodnii@kde.org>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include "renderlayer.h"
 #include "outputlayer.h"
 #include "renderlayerdelegate.h"
 #include "renderloop.h"
 
 namespace KWin
 {
 
 RenderLayer::RenderLayer(RenderLoop *loop, RenderLayer *superlayer)
     : m_loop(loop)
 {
     setSuperlayer(superlayer);
 }
 
 RenderLayer::~RenderLayer()
 {
     const auto sublayers = m_sublayers;
     for (RenderLayer *sublayer : sublayers) {
         sublayer->setSuperlayer(superlayer());
     }
     setSuperlayer(nullptr);
 }
 
 OutputLayer *RenderLayer::outputLayer() const
 {
     return m_outputLayer;
 }
 
 void RenderLayer::setOutputLayer(OutputLayer *layer)
 {
     if (m_outputLayer == layer) {
         return;
     }
     if (m_outputLayer) {
         m_outputLayer->addRepaint(mapToGlobal(boundingRect()));
     }
     m_outputLayer = layer;
     for (RenderLayer *sublayer : std::as_const(m_sublayers)) {
         sublayer->setOutputLayer(layer);
     }
 }
 
 RenderLayer *RenderLayer::superlayer() const
 {
     return m_superlayer;
 }
 
 void RenderLayer::setSuperlayer(RenderLayer *layer)
 {
     if (m_superlayer == layer) {
         return;
     }
     if (m_superlayer) {
         m_superlayer->removeSublayer(this);
     }
     m_superlayer = layer;
     if (m_superlayer) {
         m_superlayer->addSublayer(this);
     }
     updateEffectiveVisibility();
 }
 
 QList<RenderLayer *> RenderLayer::sublayers() const
 {
     return m_sublayers;
 }
 
 void RenderLayer::addSublayer(RenderLayer *sublayer)
 {
     m_sublayers.append(sublayer);
     sublayer->setOutputLayer(m_outputLayer);
     updateBoundingRect();
 }
 
 void RenderLayer::removeSublayer(RenderLayer *sublayer)
 {
     m_sublayers.removeOne(sublayer);
     sublayer->setOutputLayer(nullptr);
     updateBoundingRect();
 }
 
 RenderLoop *RenderLayer::loop() const
 {
     return m_loop;
 }
 
 RenderLayerDelegate *RenderLayer::delegate() const
 {
     return m_delegate.get();
 }
 
 void RenderLayer::setDelegate(std::unique_ptr<RenderLayerDelegate> delegate)
 {
     m_delegate = std::move(delegate);
     m_delegate->setLayer(this);
 }
 
 QRect RenderLayer::rect() const
 {
     return QRect(0, 0, m_geometry.width(), m_geometry.height());
 }
 
 QRect RenderLayer::boundingRect() const
 {
     return m_boundingRect;
 }
 
 QRect RenderLayer::geometry() const
 {
     return m_geometry;
 }
 
 void RenderLayer::setGeometry(const QRect &geometry)
 {
     if (m_geometry == geometry) {
         return;
     }
     if (m_effectiveVisible && m_outputLayer) {
         m_outputLayer->addRepaint(mapToGlobal(boundingRect()));
     }
 
     m_geometry = geometry;
     addRepaintFull();
 
     updateBoundingRect();
     if (m_superlayer) {
         m_superlayer->updateBoundingRect();
     }
 }
 
 void RenderLayer::updateBoundingRect()
 {
     QRect boundingRect = rect();
     for (const RenderLayer *sublayer : std::as_const(m_sublayers)) {
         boundingRect |= sublayer->boundingRect().translated(sublayer->geometry().topLeft());
     }
 
     if (m_boundingRect != boundingRect) {
         m_boundingRect = boundingRect;
         if (m_superlayer) {
             m_superlayer->updateBoundingRect();
         }
     }
 }
 
 void RenderLayer::addRepaintFull()
 {
     addRepaint(rect());
 }
 
 void RenderLayer::addRepaint(int x, int y, int width, int height)
 {
     addRepaint(QRegion(x, y, width, height));
 }
 
 void RenderLayer::addRepaint(const QRect &rect)
 {
     addRepaint(QRegion(rect));
 }
 
 void RenderLayer::addRepaint(const QRegion &region)
 {
     if (!m_effectiveVisible) {
         return;
     }
     if (!region.isEmpty()) {
         m_repaints += region;
         m_loop->scheduleRepaint();
     }
 }
 
 QRegion RenderLayer::repaints() const
 {
     return m_repaints;
 }
 
 void RenderLayer::resetRepaints()
 {
     m_repaints = QRegion();
 }
 
 bool RenderLayer::isVisible() const
 {
     return m_effectiveVisible;
 }
 
 void RenderLayer::setVisible(bool visible)
 {
     if (m_explicitVisible != visible) {
         m_explicitVisible = visible;
         updateEffectiveVisibility();
     }
 }
 
 bool RenderLayer::computeEffectiveVisibility() const
 {
     return m_explicitVisible && (!m_superlayer || m_superlayer->isVisible());
 }
 
 void RenderLayer::updateEffectiveVisibility()
 {
     const bool effectiveVisible = computeEffectiveVisibility();
     if (m_effectiveVisible == effectiveVisible) {
         return;
     }
 
     m_effectiveVisible = effectiveVisible;
 
     if (effectiveVisible) {
         addRepaintFull();
     } else {
         if (m_outputLayer) {
             m_outputLayer->addRepaint(mapToGlobal(boundingRect()));
         }
     }
 
     for (RenderLayer *sublayer : std::as_const(m_sublayers)) {
         sublayer->updateEffectiveVisibility();
     }
 }
 
 QPoint RenderLayer::mapToGlobal(const QPoint &point) const
 {
     QPoint result = point;
     const RenderLayer *layer = this;
     while (layer) {
         result += layer->geometry().topLeft();
         layer = layer->superlayer();
     }
     return result;
 }
 
 QRect RenderLayer::mapToGlobal(const QRect &rect) const
 {
     return rect.translated(mapToGlobal(QPoint(0, 0)));
 }
 
 QRegion RenderLayer::mapToGlobal(const QRegion &region) const
 {
     if (region.isEmpty()) {
         return QRegion();
     }
     return region.translated(mapToGlobal(QPoint(0, 0)));
 }
 
 QPoint RenderLayer::mapFromGlobal(const QPoint &point) const
 {
     QPoint result = point;
     const RenderLayer *layer = this;
     while (layer) {
         result -= layer->geometry().topLeft();
         layer = layer->superlayer();
     }
     return result;
 }
 
 QRect RenderLayer::mapFromGlobal(const QRect &rect) const
 {
     return rect.translated(mapFromGlobal(QPoint(0, 0)));
 }
 
 QRegion RenderLayer::mapFromGlobal(const QRegion &region) const
 {
     if (region.isEmpty()) {
         return QRegion();
     }
     return region.translated(mapFromGlobal(QPoint(0, 0)));
 }
 
 } // namespace KWin