File indexing completed on 2024-04-28 16:48:41

 /*
     SPDX-FileCopyrightText: 2022 Vlad Zahorodnii <vlad.zahorodnii@kde.org>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include "cursordelegate_qpainter.h"
 #include "composite.h"
 #include "core/renderlayer.h"
 #include "core/rendertarget.h"
 #include "cursor.h"
 #include "scene/cursorscene.h"
 
 #include <QPainter>
 
 namespace KWin
 {
 
 void CursorDelegateQPainter::paint(RenderTarget *renderTarget, const QRegion &region)
 {
     if (!region.intersects(layer()->mapToGlobal(layer()->rect()))) {
         return;
     }
 
     QImage *buffer = std::get<QImage *>(renderTarget->nativeHandle());
     if (Q_UNLIKELY(!buffer)) {
         return;
     }
 
     const QSize bufferSize = Cursors::self()->currentCursor()->rect().size() * renderTarget->devicePixelRatio();
     if (m_buffer.size() != bufferSize) {
         m_buffer = QImage(bufferSize, QImage::Format_ARGB32_Premultiplied);
     }
 
     RenderTarget offscreenRenderTarget(&m_buffer);
     offscreenRenderTarget.setDevicePixelRatio(renderTarget->devicePixelRatio());
 
     RenderLayer renderLayer(layer()->loop());
     renderLayer.setDelegate(std::make_unique<SceneDelegate>(Compositor::self()->cursorScene()));
     renderLayer.delegate()->prePaint();
     renderLayer.delegate()->paint(&offscreenRenderTarget, infiniteRegion());
     renderLayer.delegate()->postPaint();
 
     QPainter painter(buffer);
     painter.setClipRegion(region);
     painter.drawImage(layer()->mapToGlobal(layer()->rect()), m_buffer);
 }
 
 } // namespace KWin