119c06e403
This makes it possible for the GLSL compiler to unroll it, which also avoids the need to use relative addressing. With this change the shader should hopefully work with the R300G driver. The unused kernel weights are set to zero so they don't contribute to the end result. Thanks to Tom Stellard and Marek Olšák for their suggestions on how to solve this problem. CCBUG: 243191 svn path=/trunk/KDE/kdebase/workspace/; revision=1175021
74 lines
2 KiB
C++
74 lines
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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Copyright (C) 2010 by Fredrik Höglund <fredrik@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 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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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 createKernel(float delta, int *kernelSize);
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void createOffsets(int count, float width, Qt::Orientation direction);
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#ifdef KWIN_HAVE_OPENGL_COMPOSITING
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GLTexture *m_offscreenTex;
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GLRenderTarget *m_offscreenTarget;
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GLShader *m_shader;
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#endif
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QBasicTimer m_timer;
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QVector2D m_offsets[25];
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QVector4D m_kernel[25];
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bool m_inited;
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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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};
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} // namespace
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#endif // KWIN_LANCZOSFILTER_P_H
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