Unity 8
Style.js
1 /*
2  * Copyright (C) 2014 Canonical, Ltd.
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License as published by
6  * the Free Software Foundation; version 3.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11  * GNU General Public License for more details.
12  *
13  * You should have received a copy of the GNU General Public License
14  * along with this program. If not, see <http://www.gnu.org/licenses/>.
15  */
16 
17 .pragma library
18 
23 function luminance() {
24  var sum = 0;
25  // TODO this was originally
26  // for (var k in arguments) {
27  // but for some unkown reason was causing crashes in testDash/testDashContent
28  // investigate when we have some time
29  for (var k = 0; k < arguments.length; ++k) {
30  // only way to convert string to color
31  var c = Qt.lighter(arguments[k], 1.0);
32 
33  sum += 0.2126 * c.r + 0.7152 * c.g + 0.0722 * c.b;
34  }
35 
36  return sum / arguments.length;
37 }