1 /* 2 * Copyright (C) 2007 Eric Seidel <eric (at) 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 23 namespace WebCore { 24 25 class Color; 26 27 class ColorDistance { 28 public: 29 ColorDistance(); 30 ColorDistance(const Color& fromColor, const Color& toColor); 31 ColorDistance(int redDiff, int blueDiff, int greenDiff); 32 33 ColorDistance scaledDistance(float scaleFactor) const; 34 Color addToColor(const Color&) const; 35 36 static Color addColors(const Color&, const Color&); 37 static Color clampColor(int red, int green, int blue, int alpha); 38 39 bool isZero() const; 40 41 float distance() const; 42 43 private: 44 int m_redDiff; 45 int m_greenDiff; 46 int m_blueDiff; 47 }; 48 } 49 50 #endif // ColorDistance_h 51
