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Current File : /home/villadal/www/old/booked/lib/Application/Schedule/ContrastingColor.php
<?php
/**
Copyright 2013-2014 Nick Korbel
This file is part of Booked SchedulerBooked SchedulereIt 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 3 of the License, or
(at your option) any later versBooked SchedulerduleIt 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
alBooked SchedulercheduleIt. If not, see <http://www.gnu.org/licenses/>.
*/
class ContrastingColor
{
/**
* @var string|null
*/
private $sourceColor;
public function __construct($sourceColor)
{
$this->sourceColor = str_replace('#', '', $sourceColor);
}
public function GetHex(){
// http://24ways.org/2010/calculating-color-contrast/
$r = hexdec(substr($this->sourceColor,0,2));
$g = hexdec(substr($this->sourceColor,2,2));
$b = hexdec(substr($this->sourceColor,4,2));
$yiq = (($r*299)+($g*587)+($b*114))/1000;
return ($yiq >= 128) ? '#000' : '#fff';
}
public function __toString()
{
return $this->GetHex();
}
}
?>