1/*
2 * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public License
15 * along with this library; see the file COPYING.LIB.  If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 */
19
20#include "config.h"
21#include "core/svg/ColorDistance.h"
22
23#include "platform/graphics/Color.h"
24
25namespace blink {
26
27Color ColorDistance::addColors(const Color& first, const Color& second)
28{
29    return Color(first.red() + second.red(), first.green() + second.green(), first.blue() + second.blue());
30}
31
32float ColorDistance::distance(const Color& fromColor, const Color& toColor)
33{
34    int redDiff = toColor.red() - fromColor.red();
35    int greenDiff = toColor.green() - fromColor.green();
36    int blueDiff = toColor.blue() - fromColor.blue();
37
38    // This is just a simple distance calculation, not respecting color spaces
39    return sqrtf(redDiff * redDiff + blueDiff * blueDiff + greenDiff * greenDiff);
40}
41
42}
43