54 lines
1.7 KiB
C
54 lines
1.7 KiB
C
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/********************************************************************
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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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Copyright (C) 2006 Lubos Lunak <l.lunak@kde.org>
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Copyright (C) 2009, 2010, 2011 Martin Gräßlin <mgraesslin@kde.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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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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