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- /**
- * \file
- *
- * \author Mattia Basaglia
- *
- * \copyright Copyright (C) 2013-2020 Mattia Basaglia
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program 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 Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- *
- */
- #ifndef COLOR_UTILS_HPP
- #define COLOR_UTILS_HPP
- #include <QColor>
- #include <QPoint>
- #include <qmath.h>
- #include "QtColorWidgets/colorwidgets_global.hpp"
- namespace color_widgets {
- namespace utils {
- QCP_EXPORT inline qreal color_chromaF(const QColor& c)
- {
- qreal max = qMax(c.redF(), qMax(c.greenF(), c.blueF()));
- qreal min = qMin(c.redF(), qMin(c.greenF(), c.blueF()));
- return max - min;
- }
- QCP_EXPORT inline qreal color_lumaF(const QColor& c)
- {
- return 0.30 * c.redF() + 0.59 * c.greenF() + 0.11 * c.blueF();
- }
- QCP_EXPORT QColor color_from_lch(qreal hue, qreal chroma, qreal luma, qreal alpha = 1 );
- QCP_EXPORT inline QColor rainbow_lch(qreal hue)
- {
- return color_from_lch(hue,1,1);
- }
- QCP_EXPORT inline QColor rainbow_hsv(qreal hue)
- {
- return QColor::fromHsvF(hue,1,1);
- }
- QCP_EXPORT inline qreal color_lightnessF(const QColor& c)
- {
- return ( qMax(c.redF(),qMax(c.greenF(),c.blueF())) +
- qMin(c.redF(),qMin(c.greenF(),c.blueF())) ) / 2;
- }
- QCP_EXPORT inline qreal color_HSL_saturationF(const QColor& col)
- {
- qreal c = color_chromaF(col);
- qreal l = color_lightnessF(col);
- if ( qFuzzyCompare(l+1,1) || qFuzzyCompare(l+1,2) )
- return 0;
- return c / (1-qAbs(2*l-1));
- }
- QCP_EXPORT QColor color_from_hsl(qreal hue, qreal sat, qreal lig, qreal alpha = 1 );
- QCP_EXPORT QColor get_screen_color(const QPoint &global_pos);
- } // namespace utils
- } // namespace color_widgets
- #endif // COLOR_UTILS_HPP
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