Line data    Source code

       1             : // Copyright (c) 2021  Made to Order Software Corp.  All Rights Reserved
       2             : //
       3             : // https://snapwebsites.org/project/ftmesh
       4             : // contact@m2osw.com
       5             : //
       6             : // This program is free software; you can redistribute it and/or modify
       7             : // it under the terms of the GNU General Public License as published by
       8             : // the Free Software Foundation; either version 2 of the License, or
       9             : // (at your option) any later version.
      10             : //
      11             : // This program is distributed in the hope that it will be useful,
      12             : // but WITHOUT ANY WARRANTY; without even the implied warranty of
      13             : // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      14             : // GNU General Public License for more details.
      15             : //
      16             : // You should have received a copy of the GNU General Public License along
      17             : // with this program; if not, write to the Free Software Foundation, Inc.,
      18             : // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
      19             : #pragma once
      20             : 
      21             : /** \file
      22             :  * \brief Definitions of the ftpolygon class.
      23             :  *
      24             :  * A glyph is defined as a set of \em contours which are actually forming
      25             :  * polygons. Here we transform the FreeType vectors and tags in a list of
      26             :  * points with a direction.
      27             :  *
      28             :  * \private
      29             :  */
      30             : 
      31             : 
      32             : // self
      33             : //
      34             : #include    <ftmesh/point.h>
      35             : 
      36             : 
      37             : // FreeType lib
      38             : //
      39             : // ft2build.h must come first
      40             : #include    <ft2build.h>
      41             : 
      42             : #include    FT_FREETYPE_H
      43             : //#include    FT_GLYPH_H
      44             : //#include    FT_OUTLINE_H
      45             : 
      46             : 
      47             : namespace ftmesh
      48             : {
      49             : 
      50             : 
      51             : 
      52             : 
      53          11 : class polygon
      54             : {
      55             : public:
      56             :     typedef std::shared_ptr<polygon>        pointer_t;
      57             :     typedef std::vector<pointer_t>          vector_t;
      58             : 
      59             :                             polygon(
      60             :                                       FT_Vector * contour
      61             :                                     , char * tags
      62             :                                     , unsigned int n);
      63             : 
      64             :     std::size_t             size() const;
      65             :     point const &           at(int idx) const;
      66             :     point const &           leftmost() const;
      67             :     void                    apply_parity(int parity);
      68             : 
      69             : private:
      70             :     void                    add_point(point const & p);
      71             :     void                    evaluate_quadratic_curve(
      72             :                                   point const & a
      73             :                                 , point const & b
      74             :                                 , point const & c);
      75             :     void                    evaluate_cubic_curve(
      76             :                                   point const & a
      77             :                                 , point const & b
      78             :                                 , point const & c
      79             :                                 , point const & d);
      80             : 
      81             :     point::vector_t         f_points = point::vector_t();
      82             :     bool                    f_clockwise = false;
      83             :     point                   f_leftmost = point(65536.0, 0.0);
      84             : };
      85             : 
      86             : 
      87             : } // namespace ftmesh
      88             : // vim: ts=4 sw=4 et
      89             :