File indexing completed on 2024-05-19 05:31:36

 /*
     SPDX-FileCopyrightText: 2021 Vlad Zahorodnii <vlad.zahorodnii@kde.org>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #pragma once
 
 #include "effect/globals.h"
 #include "kwin_export.h"
 
 #include <QRegion>
 #include <chrono>
 
 namespace KWin
 {
 
 class RenderLayer;
 class RenderTarget;
 class RenderViewport;
 class SurfaceItem;
 class OutputFrame;
 
 /**
  * The RenderLayerDelegate class represents a render layer's contents.
  */
 class KWIN_EXPORT RenderLayerDelegate
 {
 public:
     virtual ~RenderLayerDelegate() = default;
 
     RenderLayer *layer() const;
     void setLayer(RenderLayer *layer);
 
     /**
      * This function is called by the compositor after compositing the frame.
      */
     virtual void frame(OutputFrame *frame);
 
     /**
      * This function is called by the compositor before starting painting. Reimplement
      * this function to do frame initialization.
      */
     virtual QRegion prePaint();
 
     /**
      * This function is called by the compositor after finishing painting. Reimplement
      * this function to do post frame cleanup.
      */
     virtual void postPaint();
 
     /**
      * Returns the direct scanout candidate hint. It can be used to avoid compositing the
      * render layer.
      */
     virtual SurfaceItem *scanoutCandidate() const;
 
     /**
      * This function is called when the compositor wants the render layer delegate
      * to repaint its contents.
      */
     virtual void paint(const RenderTarget &renderTarget, const QRegion &region) = 0;
 
 private:
     RenderLayer *m_layer = nullptr;
 };
 
 } // namespace KWin