108 lines
3.9 KiB
C++
108 lines
3.9 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) 2007 Lubos Lunak <l.lunak@kde.org>
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You can Freely distribute this program under the GNU General Public
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License. See the file "COPYING" for the exact licensing terms.
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******************************************************************/
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#include "shadow.h"
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#include <kwinglutils.h>
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#include <kconfiggroup.h>
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namespace KWin
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{
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KWIN_EFFECT( shadow, ShadowEffect )
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ShadowEffect::ShadowEffect()
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{
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KConfigGroup conf = effects->effectConfig("Shadow");
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shadowXOffset = conf.readEntry( "XOffset", 10 );
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shadowYOffset = conf.readEntry( "YOffset", 10 );
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shadowOpacity = (float)conf.readEntry( "Opacity", 0.2 );
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shadowFuzzyness = conf.readEntry( "Fuzzyness", 10 );
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}
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void ShadowEffect::prePaintWindow( EffectWindow* w, int* mask, QRegion* paint, QRegion* clip, int time )
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{
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*mask |= PAINT_WINDOW_TRANSLUCENT;
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*paint |= ( QRegion( w->geometry()) & *paint ).translated( shadowXOffset, shadowYOffset );
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effects->prePaintWindow( w, mask, paint, clip, time );
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}
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void ShadowEffect::paintWindow( EffectWindow* w, int mask, QRegion region, WindowPaintData& data )
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{
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if( !w->isDeleted() )
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drawShadow( w, mask, region, data );
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effects->paintWindow( w, mask, region, data );
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}
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void ShadowEffect::postPaintWindow( EffectWindow* w )
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{
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effects->postPaintWindow( w );
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}
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QRect ShadowEffect::transformWindowDamage( EffectWindow* w, const QRect& r )
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{
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QRect r2 = r | r.adjusted( shadowXOffset - shadowFuzzyness, shadowYOffset - shadowFuzzyness,
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shadowXOffset + shadowFuzzyness, shadowYOffset + shadowFuzzyness);
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return effects->transformWindowDamage( w, r2 );
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}
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void ShadowEffect::drawShadow( EffectWindow* window, int mask, QRegion region, WindowPaintData& data )
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{
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if(( mask & PAINT_WINDOW_TRANSLUCENT ) == 0 )
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return;
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glPushAttrib( GL_CURRENT_BIT | GL_ENABLE_BIT );
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glEnable( GL_BLEND );
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glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
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glPushMatrix();
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if( mask & PAINT_WINDOW_TRANSFORMED )
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glTranslatef( data.xTranslate, data.yTranslate, 0 );
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glTranslatef( window->x() + shadowXOffset, window->y() + shadowYOffset, 0 );
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if(( mask & PAINT_WINDOW_TRANSFORMED ) && ( data.xScale != 1 || data.yScale != 1 ))
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glScalef( data.xScale, data.yScale, 1 );
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int w = window->width();
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int h = window->height();
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int fuzzy = shadowFuzzyness;
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const float verts[ 5 * 4 * 2 ] =
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{
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// center piece (100% opacity)
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0 + fuzzy, 0 + fuzzy, 0 + fuzzy, h - fuzzy, w - fuzzy, h - fuzzy, w - fuzzy, 0 + fuzzy,
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// left
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0 - fuzzy, 0 - fuzzy, 0 - fuzzy, h + fuzzy, 0 + fuzzy, h - fuzzy, 0 + fuzzy, 0 + fuzzy,
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// top
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0 - fuzzy, 0 - fuzzy, 0 + fuzzy, 0 + fuzzy, w - fuzzy, 0 + fuzzy, w + fuzzy, 0 - fuzzy,
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// right piece
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w - fuzzy, 0 + fuzzy, w - fuzzy, h - fuzzy, w + fuzzy, h + fuzzy, w + fuzzy, 0 - fuzzy,
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// bottom
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0 + fuzzy, h - fuzzy, 0 - fuzzy, h + fuzzy, w + fuzzy, h + fuzzy, w - fuzzy, h - fuzzy,
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};
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float opacity = shadowOpacity * data.opacity;
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const float colors[ 5 * 4 * 4 ] =
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{
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// center
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0, 0, 0, opacity, 0, 0, 0, opacity, 0, 0, 0, opacity, 0, 0, 0, opacity,
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// left
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0, 0, 0, 0 , 0, 0, 0, 0 , 0, 0, 0, opacity, 0, 0, 0, opacity,
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// top
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0, 0, 0, 0 , 0, 0, 0, opacity, 0, 0, 0, opacity, 0, 0, 0, 0 ,
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// right
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0, 0, 0, opacity, 0, 0, 0, opacity, 0, 0, 0, 0 , 0, 0, 0, 0 ,
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// bottom
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0, 0, 0, opacity, 0, 0, 0, 0 , 0, 0, 0, 0 , 0, 0, 0, opacity,
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};
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renderGLGeometry( mask, region, 5 * 4, verts, 0, colors );
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glPopMatrix();
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glPopAttrib();
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}
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} // namespace
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