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