from master
This commit is contained in:
Uwe Rathmann
parent
cc5229f7a3
commit
7305502de0
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@ -81,7 +81,7 @@ QskGradient::QskGradient( const QColor& color1, const QColor& color2 )
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QskGradient::QskGradient( QGradient::Preset preset )
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: QskGradient()
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{
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setStops( qskBuildGradientStops( QGradient( preset ).stops() ) );
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setStops( qskFromQGradientStops( QGradient( preset ).stops() ) );
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}
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QskGradient::QskGradient( const QVector< QskGradientStop >& stops )
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@ -165,7 +165,7 @@ QskGradient::QskGradient( const QGradient& qGradient )
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}
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}
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setStops( qskBuildGradientStops( qGradient.stops() ) );
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setStops( qskFromQGradientStops( qGradient.stops() ) );
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}
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QskGradient::QskGradient( const QskGradient& other ) noexcept
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@ -305,7 +305,7 @@ void QskGradient::setStops( const QColor& color1, const QColor& color2 )
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void QskGradient::setStops( QGradient::Preset preset )
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{
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const auto stops = qskBuildGradientStops( QGradient( preset ).stops() );
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const auto stops = qskFromQGradientStops( QGradient( preset ).stops() );
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setStops( stops );
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}
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@ -23,6 +23,31 @@ static void qskRegisterGradientStop()
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Q_CONSTRUCTOR_FUNCTION( qskRegisterGradientStop )
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static inline qreal qskBoundedStopPos( qreal pos )
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{
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if ( ( pos < 0.0 ) || qFuzzyIsNull( pos ) )
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return 0.0;
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if ( ( pos > 1.0 ) || qFuzzyCompare( pos, 1.0 ) )
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return 1.0;
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return pos;
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}
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static inline QVector< QskGradientStop >
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qskNormalizedStops( const QVector< QskGradientStop >& stops )
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{
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auto s = stops;
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if ( s.first().position() > 0.0 )
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s.prepend( QskGradientStop( 0.0, s.first().color() ) );
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if ( s.last().position() < 1.0 )
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s.append( QskGradientStop( 1.0, s.last().color() ) );
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return s;
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}
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void QskGradientStop::setPosition( qreal position ) noexcept
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{
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m_position = position;
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@ -56,26 +81,19 @@ QskHashValue QskGradientStop::hash( QskHashValue seed ) const noexcept
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return qHashBits( &m_color, sizeof( m_color ), hash );
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}
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QColor QskGradientStop::interpolated(
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const QskGradientStop& s1, const QskGradientStop& s2, qreal position ) noexcept
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QskGradientStop QskGradientStop::interpolated(
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const QskGradientStop& to, qreal ratio ) const
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{
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if ( s1.color() == s2.color() )
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return s1.color();
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return QskGradientStop(
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m_position + ( to.m_position - m_position ) * ratio,
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QskRgb::interpolated( m_color, to.m_color, ratio )
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);
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}
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auto min = &s1;
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auto max = &s2;
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if ( min->position() > max->position() )
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std::swap( min, max );
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if ( position <= min->position() )
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return min->color();
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if ( position >= max->position() )
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return max->color();
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const qreal r = ( position - min->position() ) / ( max->position() - min->position() );
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return QskRgb::interpolated( min->color(), max->color(), r );
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QVariant QskGradientStop::interpolate(
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const QskGradientStop& from, const QskGradientStop& to, qreal ratio )
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{
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return QVariant::fromValue( from.interpolated( to, ratio ) );
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}
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#ifndef QT_NO_DEBUG_STREAM
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@ -95,19 +113,23 @@ QDebug operator<<( QDebug debug, const QskGradientStop& stop )
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#endif
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#include "moc_QskGradientStop.cpp"
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// some helper functions around QskGradientStops
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static inline QColor qskInterpolatedColor(
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const QskGradientStops& stops, int index1, int index2, qreal position )
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static inline QColor qskColorAtPosition(
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const QskGradientStop& s1, const QskGradientStop& s2, qreal pos )
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{
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const auto max = static_cast< int >( stops.count() ) - 1;
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const auto dp = s2.position() - s1.position();
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if ( qFuzzyIsNull( dp ) )
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return s1.color();
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index1 = qBound( 0, index1, max );
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index2 = qBound( 0, index2, max );
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return QskRgb::interpolated(
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s1.color(), s2.color(), ( pos - s1.position() ) / dp );
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}
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return QskGradientStop::interpolated( stops[ index1 ], stops[ index2 ], position );
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static inline QskGradientStop qskCreateStopAtPosition(
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const QskGradientStop& s1, const QskGradientStop& s2, qreal pos )
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{
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return { pos, qskColorAtPosition( s1, s2, pos ) };
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}
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bool qskIsVisible( const QskGradientStops& stops ) noexcept
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@ -278,43 +300,126 @@ QColor qskInterpolatedColorAt( const QskGradientStops& stops, qreal pos ) noexce
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if ( stops.isEmpty() )
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return QColor();
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pos = qBound( 0.0, pos, 1.0 );
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if ( pos <= stops.first().position() )
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return stops.first().color();
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for ( int i = 1; i < stops.count(); i++ )
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{
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if ( pos <= stops[ i ].position() )
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return qskInterpolatedColor( stops, i - 1, i, pos );
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return qskColorAtPosition( stops[ i - 1 ], stops[ i ], pos );
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}
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return stops.last().color();
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}
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QskGradientStops qskExtractedGradientStops(
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const QskGradientStops& gradientStops, qreal from, qreal to )
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QskGradientStops qskReplacedGradientStops( const QskGradientStops& gradientStops,
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const QskGradientStop& stop1, const QskGradientStop& stop2 )
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{
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if ( ( from > to ) || ( from > 1.0 ) || gradientStops.isEmpty() )
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return QskGradientStops();
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if ( ( from <= 0.0 ) && ( to >= 1.0 ) )
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if ( stop1.position() >= stop2.position() )
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return gradientStops;
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from = qMax( from, 0.0 );
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to = qMin( to, 1.0 );
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const auto s1 = QskGradientStop( qskBoundedStopPos( stop1.position() ), stop1.color() );
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const auto s2 = QskGradientStop( qskBoundedStopPos( stop2.position() ), stop2.color() );
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QVector< QskGradientStop > stops1 = gradientStops;
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QskGradientStops stops;
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#if 1
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if ( s1.position() == 0.0 && s2.position() == 1.0 )
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{
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stops = { s1, s2 };
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}
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else if ( qskIsMonochrome( gradientStops ) )
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{
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stops.reserve( 4 );
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const auto c = gradientStops.isEmpty()
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? QColor::fromRgba( 0 ) : gradientStops.first().color();
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if ( s1.position() > 0.0 )
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stops += { s1.position(), c };
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stops += s1;
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stops += s2;
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if ( s2.position() < 1.0 )
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stops += { s2.position(), c };
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}
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else
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{
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// not the most efficient implementation - maybe later TODO ...
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const auto stops0 = qskNormalizedStops( gradientStops );
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if ( stops1.first().position() > 0.0 )
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stops1.prepend( QskGradientStop( 0.0, stops1.first().color() ) );
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int i = 0;
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if ( stops1.last().position() < 1.0 )
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stops1.append( QskGradientStop( 1.0, stops1.last().color() ) );
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#endif
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if ( s1.position() > 0.0 )
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{
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while ( s1.position() > stops0[i].position() )
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stops += stops0[i++];
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if ( s1.position() == stops0[i].position() )
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stops += stops0[i++];
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else
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stops += qskCreateStopAtPosition( stops0[i - 1], stops0[i], s1.position() );
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}
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stops += s1;
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while ( s2.position() > stops0[i].position() )
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i++;
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stops += s2;
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if ( s2.position() < 1.0 )
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{
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while ( stops0[i + 1].position() == s2.position() )
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i++;
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if ( s2.position() != stops0[i].position() )
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stops += qskCreateStopAtPosition( stops0[i - 1], stops0[i], s2.position() );
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while( i < stops0.count() )
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stops += stops0[i++];
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}
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}
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return stops;
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}
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QskGradientStops qskClippedGradientStops(
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const QskGradientStops& stops, qreal from, qreal to )
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{
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return qskReplacedGradientStops( stops, { from, 0 }, { to, 0 } );
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}
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QskGradientStops qskExtractedGradientStops(
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const QskGradientStops& stops, qreal from, qreal to )
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{
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if ( ( from > to ) || ( to > 1.0 ) || ( from < 0.0 ) || stops.isEmpty() )
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return QskGradientStops();
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from = qskBoundedStopPos( from );
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to = qskBoundedStopPos( to );
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if ( ( from == 0.0 ) && ( to == 1.0 ) )
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return stops;
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if ( from == to )
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{
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const auto color = qskInterpolatedColorAt( stops, from );
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QVector< QskGradientStop > s;
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s.reserve( 2 );
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s += QskGradientStop( 0.0, color );
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s += QskGradientStop( 1.0, color );
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return s;
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}
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/*
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For situations where we have no stops at 0.0 and 1.0 we insert them
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manually. Not the most efficient implementation, but we avoid having
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to deal with these situations for the moment. TODO ...
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*/
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const auto stops1 = qskNormalizedStops( stops );
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QVector< QskGradientStop > stops2;
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stops2.reserve( stops1.count() );
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@ -331,26 +436,26 @@ QskGradientStops qskExtractedGradientStops(
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{
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int i = 0;
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for ( ; i < stops1.count(); i++ )
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if ( from == 0.0 )
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{
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if ( stops1[i].position() > from )
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break;
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stops2 += stops1[i++];
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}
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else
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{
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while( stops1[++i].position() <= from ); // skip leading stops
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stops2 += QskGradientStop( 0.0,
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qskInterpolatedColor( stops1, i - 1, i, from ) );
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qskColorAtPosition( stops1[i - 1], stops1[ i ], from ) );
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}
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for ( ; i < stops1.count(); i++ )
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while ( stops1[i].position() < to )
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{
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if ( stops1[i].position() >= to )
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break;
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const auto pos = ( stops1[i].position() - from ) / ( to - from );
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stops2 += QskGradientStop( pos, stops1[i].color() );
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stops2 += QskGradientStop( pos, stops1[i++].color() );
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}
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stops2 += QskGradientStop( 1.0,
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qskInterpolatedColor( stops1, i, i + 1, to ) );
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qskColorAtPosition( stops1[i - 1], stops1[ i ], to ) );
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}
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return stops2;
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@ -367,7 +472,7 @@ QskGradientStops qskRevertedGradientStops( const QskGradientStops& stops )
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return s;
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}
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QVector< QskGradientStop > qskBuildGradientStops( const QGradientStops& qtStops )
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QVector< QskGradientStop > qskFromQGradientStops( const QGradientStops& qtStops )
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{
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QVector< QskGradientStop > stops;
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stops.reserve( qtStops.count() );
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@ -463,3 +568,5 @@ QGradientStops qskToQGradientStops( const QskGradientStops& stops )
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return qStops;
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}
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#include "moc_QskGradientStop.cpp"
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@ -45,8 +45,10 @@ class QSK_EXPORT QskGradientStop
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void setRgb( QRgb ) noexcept;
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QRgb rgb() const noexcept;
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static QColor interpolated(
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const QskGradientStop&, const QskGradientStop&, qreal position ) noexcept;
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QskGradientStop interpolated( const QskGradientStop&, qreal ) const;
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static QVariant interpolate( const QskGradientStop&,
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const QskGradientStop&, qreal );
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QskHashValue hash( QskHashValue seed ) const noexcept;
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@ -129,27 +131,48 @@ QSK_EXPORT QskGradientStops qskInterpolatedGradientStops(
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const QskGradientStops&, bool, const QskGradientStops&, bool,
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qreal ratio );
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// interpolating colors in direction of a color.
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QSK_EXPORT QskGradientStops qskInterpolatedGradientStops(
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const QskGradientStops&, const QColor&, qreal ratio );
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// interpolating colors starting from a color.
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QSK_EXPORT QskGradientStops qskInterpolatedGradientStops(
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const QColor&, const QskGradientStops&, qreal ratio );
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// interpolating the opacity of the colors
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QSK_EXPORT QskGradientStops qskTransparentGradientStops(
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const QskGradientStops&, qreal ratio );
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// extracting the colors of [from, to ] and stretching them to [0.0, 1.0]
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QSK_EXPORT QskGradientStops qskExtractedGradientStops(
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const QskGradientStops&, qreal from, qreal to );
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// reverting the color stops
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QSK_EXPORT QskGradientStops qskRevertedGradientStops( const QskGradientStops& );
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QSK_EXPORT QskGradientStops qskReplacedGradientStops(
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const QskGradientStops&, const QskGradientStop&, const QskGradientStop& );
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QSK_EXPORT QskGradientStops qskClippedGradientStops(
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const QskGradientStops&, qreal from, qreal to );
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/*
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creating equidistant color stops from a list of colors.
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when discrete is true the result will contain 2 stops at each position
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one with the previous and one with the following color so that the
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interval [pos1-pos2] will be monochrome.
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*/
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QSK_EXPORT QskGradientStops qskBuildGradientStops(
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const QVector< QRgb >&, bool discrete = false );
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QSK_EXPORT QskGradientStops qskBuildGradientStops(
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const QVector< QColor >&, bool discrete = false );
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QSK_EXPORT QskGradientStops qskRevertedGradientStops( const QskGradientStops& );
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QSK_EXPORT QskGradientStops qskBuildGradientStops( const QVector< QGradientStop >& );
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/*
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convert color stops from/to a vector of QGradientStop, that can be
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used for QGradients.
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*/
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QSK_EXPORT QskGradientStops qskFromQGradientStops( const QVector< QGradientStop >& );
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QSK_EXPORT QVector< QGradientStop > qskToQGradientStops( const QVector< QskGradientStop >& );
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#endif
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@ -13,6 +13,7 @@
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#include "QskGraduationMetrics.h"
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#include "QskColorFilter.h"
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#include "QskGradient.h"
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#include "QskGradientStop.h"
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#include "QskMargins.h"
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#include "QskIntervalF.h"
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#include "QskTextColors.h"
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@ -43,6 +44,7 @@ static void qskRegisterInterpolator()
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qRegisterAnimationInterpolator< QskColorFilter >( QskColorFilter::interpolate );
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qRegisterAnimationInterpolator< QskIntervalF >( QskIntervalF::interpolate );
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qRegisterAnimationInterpolator< QskMargins >( QskMargins::interpolate );
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qRegisterAnimationInterpolator< QskGradientStop >( QskGradientStop::interpolate );
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qRegisterAnimationInterpolator< QskGradient >( QskGradient::interpolate );
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qRegisterAnimationInterpolator< QskBoxShapeMetrics >( QskBoxShapeMetrics::interpolate );
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qRegisterAnimationInterpolator< QskBoxBorderMetrics >( QskBoxBorderMetrics::interpolate );
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