khtml/svg/ColorDistance.h

   1 /*
   2  Copyright (C) 2007 Eric Seidel <eric@webkit.org>
   3
   4  This file is part of the WebKit project
   5
   6  This library is free software; you can redistribute it and/or
   7  modify it under the terms of the GNU Library General Public
   8  License as published by the Free Software Foundation; either
   9  version 2 of the License, or (at your option) any later version.
  10
  11  This library is distributed in the hope that it will be useful,
  12  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  Library General Public License for more details.
  15
  16  You should have received a copy of the GNU Library General Public License
  17  along with this library; see the file COPYING.LIB.  If not, write to
  18  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  19  Boston, MA 02110-1301, USA.
  20  */
  21
  22 #ifndef ColorDistance_h
  23 #define ColorDistance_h
  24 #if ENABLE(SVG)
  25
  26 namespace WebCore {
  27
  28     class Color;
  29
  30     class ColorDistance {
  31     public:
  32         ColorDistance();
  33         ColorDistance(const Color& fromColor, const Color& toColor);
  34         ColorDistance(int redDiff, int blueDiff, int greenDiff);
  35
  36         ColorDistance scaledDistance(float scaleFactor) const;
  37         Color addToColorAndClamp(const Color&) const;
  38
  39         static Color addColorsAndClamp(const Color&, const Color&);
  40
  41         bool isZero() const;
  42
  43         float distance() const;
  44
  45     private:
  46         short m_redDiff;
  47         short m_greenDiff;
  48         short m_blueDiff;
  49     };
  50 }
  51
  52 #endif // ENABLE(SVG)
  53 #endif // ColorDistance_h