1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
|
/*
This file is part of Icecream.
Copyright (c) 2014 Robert Płóciennik <rob.plociennik@gmail.com>
This program 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.
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 General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "utils.h"
int Utils::luminance(const QColor &color)
{
return color.red() * 0.299 + color.green() * 0.587 + color.blue() * 0.114;
}
bool Utils::isLowContrast(const QColor &color1, const QColor &color2, int treshold)
{
return qAbs(luminance(color1) - luminance(color2)) < treshold;
}
QColor Utils::betterContrastColor(const QColor &baseColor, const QColor &color1, const QColor &color2)
{
return qAbs(luminance(baseColor) - luminance(color1)) >= qAbs(luminance(baseColor) - luminance(color2)) ? color1 : color2;
}
QColor Utils::textColor(const QColor &baseColor)
{
return betterContrastColor(baseColor, Qt::black, Qt::white);
}
|