File indexing completed on 2024-04-14 05:24:53

 /*
     SPDX-FileCopyrightText: 2020 Michail Vourlakos <mvourlakos@gmail.com>
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include "tools.h"
 
 // Qt
 #include <QtMath>
 
 namespace Latte{
 
 Tools::Tools(QObject *parent)
     : QObject(parent)
 {
 }
 
 float Tools::colorBrightness(QColor color)
 {
     return colorBrightness(color.red(), color.green(), color.blue());
 }
 
 float Tools::colorBrightness(QRgb rgb)
 {
     return colorBrightness(qRed(rgb), qGreen(rgb), qBlue(rgb));
 }
 
 float Tools::colorBrightness(float r, float g, float b)
 {
     float brightness = (r * 299 + g * 587 + b * 114) / 1000;
 
     return brightness;
 }
 
 float Tools::colorLumina(QRgb rgb)
 {
     float r = (float)(qRed(rgb)) / 255;
     float g = (float)(qGreen(rgb)) / 255;
     float b = (float)(qBlue(rgb)) / 255;
 
     return colorLumina(r, g, b);
 }
 
 float Tools::colorLumina(QColor color)
 {
     return colorLumina(color.redF(), color.greenF(), color.blueF());
 }
 
 float Tools::colorLumina(float r, float g, float b)
 {
     // formula for luminance according to:
     // https://www.w3.org/TR/2008/REC-WCAG20-20081211/#relativeluminancedef
 
     float rS = (r <= 0.03928 ? r / 12.92 : qPow(((r + 0.055) / 1.055), 2.4));
     float gS = (g <= 0.03928 ? g / 12.92 : qPow(((g + 0.055) / 1.055), 2.4));
     float bS = (b <= 0.03928 ? b / 12.92 : qPow(((b + 0.055) / 1.055), 2.4));
 
     float luminosity = 0.2126 * rS + 0.7152 * gS + 0.0722 * bS;
 
     return luminosity;
 }
 
 }