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PathTraversalState.h

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00001 /*
00002  * Copyright (C) 2006, 2007 Eric Seidel <eric@webkit.org>
00003  *
00004  * Redistribution and use in source and binary forms, with or without
00005  * modification, are permitted provided that the following conditions
00006  * are met:
00007  * 1. Redistributions of source code must retain the above copyright
00008  *    notice, this list of conditions and the following disclaimer.
00009  * 2. Redistributions in binary form must reproduce the above copyright
00010  *    notice, this list of conditions and the following disclaimer in the
00011  *    documentation and/or other materials provided with the distribution.
00012  *
00013  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
00014  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00015  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
00016  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
00017  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
00018  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
00019  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
00020  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
00021  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
00022  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
00023  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
00024  */
00025 
00026 #ifndef PathTraversalState_h
00027 #define PathTraversalState_h
00028 
00029 #include "FloatPoint.h"
00030 #include <wtf/Vector.h>
00031 
00032 namespace WebCore {
00033     
00034     class Path;
00035     
00036     class PathTraversalState {
00037     public:
00038         enum PathTraversalAction {
00039             TraversalTotalLength,
00040             TraversalPointAtLength,
00041             TraversalSegmentAtLength,
00042             TraversalNormalAngleAtLength
00043         };
00044         
00045         PathTraversalState(PathTraversalAction);
00046         
00047         float closeSubpath();
00048         float moveTo(const FloatPoint&);
00049         float lineTo(const FloatPoint&);
00050         float quadraticBezierTo(const FloatPoint& newControl, const FloatPoint& newEnd);
00051         float cubicBezierTo(const FloatPoint& newControl1, const FloatPoint& newControl2, const FloatPoint& newEnd);
00052         
00053     public:
00054         PathTraversalAction m_action;
00055         bool m_success;
00056         
00057         FloatPoint m_current;
00058         FloatPoint m_start;
00059         FloatPoint m_control1;
00060         FloatPoint m_control2;
00061         
00062         float m_totalLength;
00063         unsigned m_segmentIndex;
00064         float m_desiredLength;
00065         
00066         // For normal calculations
00067         FloatPoint m_previous;
00068         float m_normalAngle; // degrees
00069     };    
00070 }
00071 
00072 #endif

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