7228e9aefd
This unifies frame hooks for OpenGL and QPainter render backends. There are a couple of reasons why it's a good idea - it provides one mental framework to start painting a frame, the Compositor will be able to start and submit frames. The last one is very cool because it gives the Compositor more power over compositing. Besides unifying frame hooks, this cleans up a bit the arg naming mess in endFrame(). As is, "damage" and "damagedRegion" are very confusing names. "damage" arg has been renamed to "renderedRegion," because that's what it is. The renderedRegion arg specifies the region that has been repainted by the Scene. It's different from the damagedRegion as that one specifies the surface damage, i.e. the difference between the current and the next frame, while the renderedRegion may include a region that had to be repainted to repair the back buffer. The main reason why we need renderedRegion is the X11 platform. On Wayland, it's unused. In the future, we will need to extend this api with output layers.
49 lines
1.1 KiB
C++
49 lines
1.1 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: 2015 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_FB_BACKEND_H
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#define KWIN_SCENE_QPAINTER_FB_BACKEND_H
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#include "qpainterbackend.h"
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#include <QObject>
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#include <QImage>
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namespace KWin
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{
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class FramebufferBackend;
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class FramebufferQPainterBackend : public QPainterBackend
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{
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Q_OBJECT
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public:
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FramebufferQPainterBackend(FramebufferBackend *backend);
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~FramebufferQPainterBackend() override;
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QImage *bufferForScreen(AbstractOutput *output) override;
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QRegion beginFrame(AbstractOutput *output) override;
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void endFrame(AbstractOutput *output, const QRegion &renderedRegion, const QRegion &damagedRegion) override;
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private:
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void reactivate();
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void deactivate();
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/**
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* @brief mapped memory buffer on fb device
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*/
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QImage m_renderBuffer;
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/**
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* @brief buffer to draw into
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*/
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QImage m_backBuffer;
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FramebufferBackend *m_backend;
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};
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}
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#endif
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