File indexing completed on 2024-04-28 16:49:37

 /*
  * Copyright 2018  Michail Vourlakos <mvourlakos@gmail.com>
  *
  * This file is part of Latte-Dock
  *
  * Latte-Dock 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 2 of
  * the License, or (at your option) any later version.
  *
  * Latte-Dock 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 for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
 
 #include "commontools.h"
 
 // Qt
 #include <QFileInfo>
 #include <QStandardPaths>
 #include <QtMath>
 
 namespace Latte {
 
 float colorBrightness(QColor color)
 {
     return colorBrightness(color.red(), color.green(), color.blue());
 }
 
 float colorBrightness(QRgb rgb)
 {
     return colorBrightness(qRed(rgb), qGreen(rgb), qBlue(rgb));
 }
 
 float colorBrightness(float r, float g, float b)
 {
     float brightness = (r * 299 + g * 587 + b * 114) / 1000;
 
     return brightness;
 }
 
 
 float 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 colorLumina(QColor color)
 {
     return colorLumina(color.redF(), color.greenF(), color.blueF());
 }
 
 float 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;
 }
 
 QString standardPath(QString subPath, bool localfirst)
 {
     QStringList paths = QStandardPaths::standardLocations(QStandardPaths::GenericDataLocation);
 
     if (localfirst) {
         for (const auto &pt : paths) {
             QString ptF = pt + "/" +subPath;
             if (QFileInfo(ptF).exists()) {
                 return ptF;
             }
         }
     } else {
         for (int i=paths.count()-1; i>=0; i--) {
             QString ptF = paths[i] + "/" +subPath;
             if (QFileInfo(ptF).exists()) {
                 return ptF;
             }
         }
     }
 
     //! in any case that above fails
     if (QFileInfo("/usr/share/"+subPath).exists()) {
         return "/usr/share/"+subPath;
     }
 
     return "";
 }
 
 }