43 lines
1.0 KiB
C++
43 lines
1.0 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: 2006 Lubos Lunak <l.lunak@kde.org>
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SPDX-FileCopyrightText: 2009, 2010, 2011 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_OPENGL_SWAP_PROFILER_H
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#define KWIN_SCENE_OPENGL_SWAP_PROFILER_H
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#include <QElapsedTimer>
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#include <kwin_export.h>
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namespace KWin
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{
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/**
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* @short Profiler to detect whether we have triple buffering
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* The strategy is to start setBlocksForRetrace(false) but assume blocking and have the system prove that assumption wrong
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*/
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class KWIN_EXPORT SwapProfiler
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{
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public:
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SwapProfiler();
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void init();
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void begin();
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/**
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* @return char being 'd' for double, 't' for triple (or more - but non-blocking) buffering and
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* 0 (NOT '0') otherwise, so you can act on "if (char result = SwapProfiler::end()) { fooBar(); }
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*/
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char end();
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private:
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QElapsedTimer m_timer;
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qint64 m_time;
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int m_counter;
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};
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}
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#endif
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