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/*
SPDX-FileCopyrightText: 2018 Michail Vourlakos <mvourlakos@gmail.com>
SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "commontools.h"
// Qt
#include <QDir>
#include <QFileInfo>
#include <QStandardPaths>
#include <QStringList>
#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 rectToString(const QRect &rect)
{
QString result;
result += QString(QString::number(rect.x()) + "," + QString::number(rect.y()));
result += " ";
result += QString(QString::number(rect.width()) + "x" + QString::number(rect.height()));
return result;
}
QRect stringToRect(const QString &str)
{
QStringList parts = str.split(" ");
QStringList pos = parts[0].split(",");
QStringList size = parts[1].split("x");
return QRect(pos[0].toInt(), pos[1].toInt(), size[0].toInt(), size[1].toInt());
}
QString standardPath(QString subPath, bool localfirst)
{
QStringList paths = QStandardPaths::standardLocations(QStandardPaths::GenericDataLocation);
QString separator = subPath.startsWith("/") ? "" : "/";
if (localfirst) {
for (const auto &pt : paths) {
QString ptF = pt + separator +subPath;
if (QFileInfo(ptF).exists()) {
return ptF;
}
}
} else {
for (int i=paths.count()-1; i>=0; i--) {
QString ptF = paths[i] + separator +subPath;
if (QFileInfo(ptF).exists()) {
return ptF;
}
}
}
//! in any case that above fails
if (QFileInfo("/usr/share" + separator + subPath).exists()) {
return "/usr/share" + separator + subPath;
}
return "";
}
QString configPath()
{
QStringList configPaths = QStandardPaths::standardLocations(QStandardPaths::ConfigLocation);
if (configPaths.count() == 0) {
return QDir::homePath() + "/.config";
}
return configPaths[0];
}
}
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