kc3-lang/ftgl/src/FTContour.h

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• Hash : 1f4a94f8
  Author :
  Date : 2008-04-29T14:39:28
  

  * Since the MIT license is LGPL-compatible, there is no real point in shipping FTGL under a dual license. Consequently removing LGPL references from the code, in agreement with Sean.

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• src/FTContour.h

• /*
   * FTGL - OpenGL font library
   *
   * Copyright (c) 2001-2004 Henry Maddocks <ftgl@opengl.geek.nz>
   *               2008 Éric Beets <ericbeets@free.fr>
   *
   * 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     __FTContour__
  #define     __FTContour__
  
  #include "ftgl.h"
  
  #include "FTPoint.h"
  #include "FTVector.h"
  
  
  /**
   * FTContour 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 FTVectoriser.
   *
   * @see FTOutlineGlyph
   * @see FTPolyGlyph
   * @see FTPoint
   */
  class FTGL_EXPORT FTContour
  {
      public:
          /**
           * Constructor
           *
           * @param contour
           * @param pointTags
           * @param numberOfPoints
           */
          FTContour(FT_Vector* contour, char* pointTags, unsigned int numberOfPoints);
  
          /**
           * Destructor
           */
          ~FTContour()
          {
              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 FTPoint& Point(unsigned int index) const { return pointList[index]; }
  
          /**
           * Return a point at index.
           *
           * @param index of the point in the outset curve.
           * @return const point reference
           */
          const FTPoint& Outset(unsigned int index) const { return outsetPointList[index]; }
  
          /**
           * Return a point at index of the front outset contour.
           *
           * @param index of the point in the curve.
           * @return const point reference
           */
          const FTPoint& FrontPoint(unsigned int index) const
          {
              if(frontPointList.size() == 0)
                  return Point(index);
              return frontPointList[index];
          }
  
  
          /**
           * Return a point at index of the back outset contour.
           *
           * @param index of the point in the curve.
           * @return const point reference
           */
          const FTPoint& BackPoint(unsigned int index) const
          {
              if(backPointList.size() == 0)
                  return Point(index);
               return backPointList[index];
          }
  
          /**
           * How many points define this contour
           *
           * @return the number of points in this contour
           */
          size_t PointCount() const { return pointList.size(); }
  
          /**
           * How many points define this outset contour
           *
           * @return the number of points in this contour
           */
          size_t OutsetPointCount() const { return outsetPointList.size(); }
          size_t FrontPointCount() const { return frontPointList.size(); }
          size_t BackPointCount() const { return backPointList.size(); }
  
          /**
           * Create the front/back outset contour
           *
           * @param outset The outset distance
           */
          void buildFrontOutset(float outset);
          void buildBackOutset(float outset);
  
      private:
          /**
           * Add a point to this contour. This function tests for duplicate
           * points.
           *
           * @param point The point to be added to the contour.
           */
          inline void AddPoint(FTPoint point);
  
          /**
           * Add a point to this contour. This function tests for duplicate
           * points.
           *
           * @param point The point to be added to the contour.
           */
          inline void AddOutsetPoint(FTPoint point);
  
          /*
           * Add a point to this outset contour. This function tests for duplicate
           * points.
           *
           * @param point The point to be added to the contour outset.
           */
          inline void AddFrontPoint(FTPoint point);
          inline void AddBackPoint(FTPoint point);
  
          /**
           * De Casteljau (bezier) algorithm contributed by Jed Soane
           * Evaluates a quadratic or conic (second degree) curve
           */
          inline void evaluateQuadraticCurve(FTPoint, FTPoint, FTPoint);
  
          /**
           * De Casteljau (bezier) algorithm contributed by Jed Soane
           * Evaluates a cubic (third degree) curve
           */
          inline void evaluateCubicCurve(FTPoint, FTPoint, FTPoint, FTPoint);
  
          /**
           * Create the list point of the outset contour.
           */
          inline void outsetContour();
  
          /**
           * Compute the vector norm
           */
          inline FTGL_DOUBLE NormVector(const FTPoint &v);
  
          /**
           * Compute a rotation matrix from a vector
           */
          inline void RotationMatrix(const FTPoint &a, const FTPoint &b, FTGL_DOUBLE *matRot, FTGL_DOUBLE *invRot);
  
          /**
           * Matrix and vector multiplication
           */
          inline void MultMatrixVect(FTGL_DOUBLE *mat, FTPoint &v);
  
          /**
           * Compute the vector bisecting from a vector 'v' and a distance 'd'
           */
          inline void ComputeBisec(FTPoint &v);
  
          /**
           * Compute the outset point coordinates
           */
          inline FTPoint ComputeOutsetPoint(FTPoint a, FTPoint b, FTPoint c);
  
          /**
           *  The list of points in this contour
           */
          typedef FTVector<FTPoint> PointVector;
          PointVector pointList;
          PointVector outsetPointList;
          PointVector frontPointList;
          PointVector backPointList;
  };
  
  #endif // __FTContour__
  

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