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 #include "config.h" 21 #include "core/svg/ColorDistance.h" 22 23 #include "platform/graphics/Color.h" 24 25 namespace WebCore { 26 27 Color 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 32 float 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
