ResInsight/ApplicationLibCode/Application/Tools/RiaColorTools.h

/////////////////////////////////////////////////////////////////////////////////
//
//  Copyright (C) 2018-    Equinor ASA
//  Copyright (C) 2017     Statoil ASA
//
//  ResInsight is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
//
//  ResInsight is distributed in the hope that it will be useful, but WITHOUT ANY
//  WARRANTY; without even the implied warranty of MERCHANTABILITY or
//  FITNESS FOR A PARTICULAR PURPOSE.
//
//  See the GNU General Public License at <http://www.gnu.org/licenses/gpl.html>
//  for more details.
//
/////////////////////////////////////////////////////////////////////////////////

#pragma once

#include "cvfArray.h"

#include <QColor>

//==================================================================================================
///
///
//==================================================================================================
class RiaColorTools
{
public:
    static bool isBrightnessAboveThreshold( cvf::Color3f backgroundColor );

    static cvf::Color3f computeOffsetColor( cvf::Color3f color, float offsetFactor );
    static cvf::Color3f darkContrastColor();
    static cvf::Color3f brightContrastColor();
    static cvf::Color3f darkContrastColorSofter();
    static cvf::Color3f brightContrastColorSofter();
    static cvf::Color3f contrastColor( cvf::Color3f backgroundColor, bool softerContrast = false );
    static QColor       toQColor( cvf::Color3f color, float alpha = 1.0f );
    static QColor       toQColor( cvf::Color4f color );
    static cvf::Color3f fromQColorTo3f( QColor );

    static QColor       textColor();
    static cvf::Color3f textColor3f();

    static cvf::Color3f
                  blendCvfColors( const cvf::Color3f& color1, const cvf::Color3f& color2, int weight1 = 1, int weight2 = 1 );
    static QColor blendQColors( const QColor& color1, const QColor& color2, int weight1 = 1, int weight2 = 1 );

    // Factor > 1 increases saturation, a factor < 1 decreases saturation
    static QColor modifySaturation( const QColor& color, double factor );

private:
    static float relativeLuminance( cvf::Color3f backgroundColor );
    static float calculateNonLinearColorValue( float colorFraction );
};