0cbc79193b
LanczosFilter tries to discard all cached textures in the timer event by getting the stacking order and iterating over it. But this approach seems wrong from several aspects. First of all the xStackingOrder does not include Deleted windows. So if a cached texture still exists on an EffectWindow for a Deleted it would not be discarded. Also the xStackingOrder could result in an update from X because the stacking order is currently considered dirty. Last but not least the EffectsHandler::stackingOrder creates a temporary list of EffectWindows - good for Effects but not necessarily useful inside KWin core. Instead the LanczosFilter gets the list of Clients, desktops, unmanaged and deleted and iterates over them to check whether there is a texture to discard. REVIEW: 109954
77 lines
2.1 KiB
C++
77 lines
2.1 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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Copyright (C) 2010 by Fredrik Höglund <fredrik@kde.org>
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Copyright (C) 2010 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_LANCZOSFILTER_P_H
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#define KWIN_LANCZOSFILTER_P_H
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#include <QObject>
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#include <QBasicTimer>
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#include <QVector>
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#include <QVector2D>
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#include <QVector4D>
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#include <kwinconfig.h>
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namespace KWin
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{
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class EffectWindow;
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class EffectWindowImpl;
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class WindowPaintData;
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class GLTexture;
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class GLRenderTarget;
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class GLShader;
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class LanczosFilter
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: public QObject
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{
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Q_OBJECT
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public:
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explicit LanczosFilter(QObject* parent = 0);
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~LanczosFilter();
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void performPaint(EffectWindowImpl* w, int mask, QRegion region, WindowPaintData& data);
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protected:
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virtual void timerEvent(QTimerEvent*);
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private:
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void init();
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void updateOffscreenSurfaces();
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void setUniforms();
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void discardCacheTexture(EffectWindow *w);
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void createKernel(float delta, int *kernelSize);
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void createOffsets(int count, float width, Qt::Orientation direction);
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GLTexture *m_offscreenTex;
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GLRenderTarget *m_offscreenTarget;
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QBasicTimer m_timer;
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bool m_inited;
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QScopedPointer<GLShader> m_shader;
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int m_uTexUnit;
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int m_uOffsets;
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int m_uKernel;
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QVector2D m_offsets[16];
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QVector4D m_kernel[16];
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};
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} // namespace
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#endif // KWIN_LANCZOSFILTER_P_H
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