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Improved glow, using analytical formula and number of points on gradient adjusted to 

gradient size.


svn path=/trunk/KDE/kdebase/workspace/; revision=1125246
icc-effect-5.14.5
Hugo Pereira Da Costa 2010-05-11 02:06:20 +00:00
parent fbabe1a0cf
commit da8593d092
1 changed files with 32 additions and 10 deletions
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42
clients/oxygen/oxygenshadowcache.cpp
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@ -183,13 +183,24 @@ namespace Oxygen
const qreal hoffset = shadowConfiguration.horizontalOffset()*gradientSize/fixedSize;
const qreal voffset = shadowConfiguration.verticalOffset()*gradientSize/fixedSize;
const int nPoints = 7;
const qreal x[7] = {0, 0.05, 0.1, 0.15, 0.2, 0.3, 0.4 };
const qreal values[7] = {0.8, 0.78, 0.69, 0.42, 0.18, 0.01, 0 };
// gaussian shadow is used
int nPoints( (10*gradientSize)/fixedSize );
const qreal magnitude( 0.85 );
const qreal width( 0.17 );
QRadialGradient rg = QRadialGradient( size+12.0*hoffset, size+12.0*voffset, gradientSize );
rg.setColorAt(1, Qt::transparent );
QColor c = shadowConfiguration.innerColor();
for( int i = 0; i<nPoints; i++ )
{ c.setAlphaF( values[i] ); rg.setColorAt( x[i], c ); }
for( int i = 0; i < nPoints; i++ )
{
qreal x = qreal(i)/nPoints;
qreal value = magnitude*std::exp( -sqr(x/width) );
c.setAlphaF( value );
rg.setColorAt( x, c );
}
p.setBrush( rg );
renderGradient( p, shadow.rect(), rg, hasBorder );
@ -203,13 +214,24 @@ namespace Oxygen
const qreal hoffset = shadowConfiguration.horizontalOffset()*gradientSize/fixedSize;
const qreal voffset = shadowConfiguration.verticalOffset()*gradientSize/fixedSize;
const int nPoints = 7;
const qreal x[7] = {0, 0.15, 0.3, 0.45, 0.65, 0.75, 1 };
const qreal values[7] = {0.47, 0.37, 0.2, 0.08, 0.04, 0.02, 0 };
// gaussian shadow is used
int nPoints( (10*gradientSize)/fixedSize );
const qreal magnitude( 0.46 );
const qreal width( 0.34 );
QRadialGradient rg = QRadialGradient( size+12.0*hoffset, size+12.0*voffset, gradientSize );
rg.setColorAt(1, Qt::transparent );
QColor c = shadowConfiguration.outerColor();
for( int i = 0; i<nPoints; i++ )
{ c.setAlphaF( values[i] ); rg.setColorAt( x[i], c ); }
for( int i = 0; i < nPoints; i++ )
{
qreal x = qreal(i)/nPoints;
qreal value = magnitude*std::exp( -sqr(x/width) );
c.setAlphaF( value );
rg.setColorAt( x, c );
}
p.setBrush( rg );
p.drawRect( shadow.rect() );