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#ifndef ColorDistance_h
21#define ColorDistance_h
22#if ENABLE(SVG)
23
24namespace WebCore {
25
26class Color;
27
28class ColorDistance {
29public:
30    ColorDistance();
31    ColorDistance(const Color& fromColor, const Color& toColor);
32    ColorDistance(int redDiff, int blueDiff, int greenDiff);
33
34    ColorDistance scaledDistance(float scaleFactor) const;
35    Color addToColor(const Color&) const;
36
37    static Color addColors(const Color&, const Color&);
38    static Color clampColor(int red, int green, int blue, int alpha);
39
40    bool isZero() const;
41
42    float distance() const;
43
44private:
45    int m_redDiff;
46    int m_greenDiff;
47    int m_blueDiff;
48};
49}
50
51#endif // ENABLE(SVG)
52#endif // ColorDistance_h
53