32 lines
961 B
C++
32 lines
961 B
C++
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/******************************************************************************
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* QSkinny - Copyright (C) 2016 Uwe Rathmann
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* This file may be used under the terms of the QSkinny License, Version 1.0
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*****************************************************************************/
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#include "QskRgbValue.h"
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namespace
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{
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inline int value( int from, int to, qreal progress )
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{
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return int( from + ( to - from ) * progress );
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}
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}
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QRgb QskRgbValue::interpolated( QRgb rgb1, QRgb rgb2, qreal ratio )
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{
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// interpolating in HSV usually provides better results !!
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if ( rgb1 == rgb2 )
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return rgb1;
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ratio = qBound( 0.0, ratio, 1.0 );
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const int r = value( qRed( rgb1 ), qRed( rgb2 ), ratio );
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const int g = value( qGreen( rgb1 ), qGreen( rgb2 ), ratio );
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const int b = value( qBlue( rgb1 ), qBlue( rgb2 ), ratio );
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const int a = value( qAlpha( rgb1 ), qAlpha( rgb2 ), ratio );
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return qRgba( r, g, b, a );
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}
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