f26eeb9706
Currently, the OpenGLBackend and the QPainterBackend have hooks to indicate the start and the end of compositing cycle, but in both cases, the hooks have different names. This change fixes that inconsistency.
77 lines
2.2 KiB
C++
77 lines
2.2 KiB
C++
/*
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KWin - the KDE window manager
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This file is part of the KDE project.
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SPDX-FileCopyrightText: 2013 Martin Gräßlin <mgraesslin@kde.org>
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SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#ifndef KWIN_SCENE_QPAINTER_BACKEND_H
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#define KWIN_SCENE_QPAINTER_BACKEND_H
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class QImage;
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class QRegion;
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class QSize;
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class QString;
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namespace KWin
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{
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class QPainterBackend
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{
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public:
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virtual ~QPainterBackend();
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virtual void endFrame(int screenId, int mask, const QRegion &damage) = 0;
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virtual void beginFrame(int screenId) = 0;
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/**
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* @brief React on screen geometry changes.
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*
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* Default implementation does nothing. Override if specific functionality is required.
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*
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* @param size The new screen size
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*/
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virtual void screenGeometryChanged(const QSize &size);
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/**
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* @brief Whether the creation of the Backend failed.
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*
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* The SceneQPainter should test whether the Backend got constructed correctly. If this method
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* returns @c true, the SceneQPainter should not try to start the rendering.
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*
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* @return bool @c true if the creation of the Backend failed, @c false otherwise.
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*/
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bool isFailed() const {
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return m_failed;
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}
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/**
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* Overload for the case that there is a different buffer per screen.
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* Default implementation just calls buffer.
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* @param screenId The id of the screen as used in Screens
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* @todo Get a better identifier for screen then a counter variable
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*/
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virtual QImage *bufferForScreen(int screenId) = 0;
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virtual bool needsFullRepaint(int screenId) const = 0;
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/**
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* Whether the rendering needs to be split per screen.
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* Default implementation returns @c false.
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*/
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virtual bool perScreenRendering() const;
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protected:
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QPainterBackend();
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/**
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* @brief Sets the backend initialization to failed.
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*
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* This method should be called by the concrete subclass in case the initialization failed.
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* The given @p reason is logged as a warning.
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*
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* @param reason The reason why the initialization failed.
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*/
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void setFailed(const QString &reason);
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private:
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bool m_failed;
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};
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} // KWin
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#endif
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