WebCore/PathTraversalState.h

   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 "FloatPoint.h"
  30 #include <wtf/Vector.h>
  31
  32 namespace WebCore {
  33
  34     class Path;
  35
  36     class PathTraversalState {
  37     public:
  38         enum PathTraversalAction {
  39             TraversalTotalLength,
  40             TraversalPointAtLength,
  41             TraversalSegmentAtLength,
  42             TraversalNormalAngleAtLength
  43         };
  44
  45         PathTraversalState(PathTraversalAction);
  46
  47         float closeSubpath();
  48         float moveTo(const FloatPoint&);
  49         float lineTo(const FloatPoint&);
  50         float quadraticBezierTo(const FloatPoint& newControl, const FloatPoint& newEnd);
  51         float cubicBezierTo(const FloatPoint& newControl1, const FloatPoint& newControl2, const FloatPoint& newEnd);
  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