1 /* 2 * Copyright (C) 2006, 2007 Eric Seidel <eric@webkit.org> 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef PathTraversalState_h 27 #define PathTraversalState_h 28 29 #include "platform/PlatformExport.h" 30 #include "platform/geometry/FloatPoint.h" 31 32 namespace WebCore { 33 34 class PLATFORM_EXPORT PathTraversalState { 35 public: 36 enum PathTraversalAction { 37 TraversalTotalLength, 38 TraversalPointAtLength, 39 TraversalSegmentAtLength, 40 TraversalNormalAngleAtLength 41 }; 42 43 PathTraversalState(PathTraversalAction); 44 45 float closeSubpath(); 46 float moveTo(const FloatPoint&); 47 float lineTo(const FloatPoint&); 48 float quadraticBezierTo(const FloatPoint& newControl, const FloatPoint& newEnd); 49 float cubicBezierTo(const FloatPoint& newControl1, const FloatPoint& newControl2, const FloatPoint& newEnd); 50 51 void processSegment(); 52 53 public: 54 PathTraversalAction m_action; 55 bool m_success; 56 57 FloatPoint m_current; 58 FloatPoint m_start; 59 FloatPoint m_control1; 60 FloatPoint m_control2; 61 62 float m_totalLength; 63 unsigned m_segmentIndex; 64 float m_desiredLength; 65 66 // For normal calculations 67 FloatPoint m_previous; 68 float m_normalAngle; // degrees 69 }; 70 } 71 72 #endif 73