text: /*
   * FTGL - OpenGL font library
   *
   * Copyright (c) 2001-2004 Henry Maddocks <ftgl@opengl.geek.nz>
   * Copyright (c) 2008 Éric Beets <ericbeets@free.fr>
   * Copyright (c) 2008 Sam Hocevar <sam@zoy.org>
   *
   * Permission is hereby granted, free of charge, to any person obtaining
   * a copy of this software and associated documentation files (the
   * "Software"), to deal in the Software without restriction, including
   * without limitation the rights to use, copy, modify, merge, publish,
   * distribute, sublicense, and/or sell copies of the Software, and to
   * permit persons to whom the Software is furnished to do so, subject to
   * the following conditions:
   *
   * The above copyright notice and this permission notice shall be
   * included in all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
   * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
   * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
   * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
   * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   */
  
  #ifndef _DIFONT_CONTOUR_H_
  #define _DIFONT_CONTOUR_H_
  
  #include <vector>
  #include <ft2build.h>
  #include <freetype/freetype.h>
  #include <freetype/ftglyph.h>
  #include <freetype/ftoutln.h>
  #include <freetype/fttrigon.h>
  
  #include "Point.h"
  
  /**
   * Contour class is a container of points that describe a vector font
   * outline. It is used as a container for the output of the bezier curve
   * evaluator in Vectoriser.
   *
   * @see OutlineGlyph
   * @see PolygonGlyph
   * @see Point
   */
  
   class Contour {
      public:
          /**
           * Constructor
           *
           * @param contour
           * @param pointTags
           * @param numberOfPoints
           */
          Contour(FT_Vector* contour, char* pointTags, unsigned int numberOfPoints, unsigned short bezierSteps);
  
          /**
           * Destructor
           */
          ~Contour()
          {
              pointList.clear();
              outsetPointList.clear();
              frontPointList.clear();
              backPointList.clear();
          }
  
          /**
           * Return a point at index.
           *
           * @param index of the point in the curve.
           * @return const point reference
           */
          const Point& GetPoint(size_t index) const { return pointList[index]; }
  
          /**
           * How many points define this contour
           *
           * @return the number of points in this contour
           */
          size_t PointCount() const { return pointList.size(); }
  
          /**
           * Make sure the glyph has the proper parity and create the front/back
           * outset contour.
           *
           * @param parity  The contour's parity within the glyph.
           */
          void SetParity(int parity);
  
          /**
           * Make sure the glyph has the proper parity and create the front/back
           * outset contour.
           *
           * @param parity  The contour's parity within the glyph.
           */
          bool GetDirection() const {
              return clockwise;
          }
  
          bool IsInside(const Contour* big) const {
              if(minx > big->minx && miny > big->miny 
                  && maxx < big->maxx && maxy < big->maxy)
                  return true;
              else 
                  return false;
          }
  
          float minx, miny, maxx, maxy;
      private:
          /**
           * Add a point to this contour. This function tests for duplicate
           * points.
           *
           * @param point The point to be added to the contour.
           */
          void AddPoint(Point point);
  
          /**
           * Add a point to this contour. This function tests for duplicate
           * points.
           *
           * @param point The point to be added to the contour.
           */
          void AddOutsetPoint(Point point);
  
  
          /**
           * De Casteljau (bezier) algorithm contributed by Jed Soane
           * Evaluates a quadratic or conic (second degree) curve
           */
          void evaluateQuadraticCurve(Point, Point, Point, unsigned short);
  
          /**
           * De Casteljau (bezier) algorithm contributed by Jed Soane
           * Evaluates a cubic (third degree) curve
           */
          void evaluateCubicCurve(Point, Point, Point, Point, unsigned short);
  
          /**
           * Compute the outset point coordinates
           */
          Point ComputeOutsetPoint(Point a, Point b, Point c);
  
          /**
           *  The list of points in this contour
           */
          typedef std::vector<Point> PointVector;
          PointVector pointList;
          PointVector outsetPointList;
          PointVector frontPointList;
          PointVector backPointList;
          
          /**
           *  Is this contour clockwise or anti-clockwise?
           */
          bool clockwise;
  
  };
  
  #endif // __Contour__
  
  