/*

 * Copyright © 2023  Behdad Esfahbod

 *

 *  This is part of HarfBuzz, a text shaping library.

 *

 * Permission is hereby granted, without written agreement and without

 * license or royalty fees, to use, copy, modify, and distribute this

 * software and its documentation for any purpose, provided that the

 * above copyright notice and the following two paragraphs appear in

 * all copies of this software.

 *

 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR

 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES

 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN

 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH

 * DAMAGE.

 *

 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,

 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND

 * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS

 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO

 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.

 */

#ifndef HB_OUTLINE_HH

#define HB_OUTLINE_HH

#include "hb.hh"

#include "hb-draw.hh"

struct hb_outline_point_t

{

  enum class type_t

  {

    MOVE_TO,

    LINE_TO,

    QUADRATIC_TO,

    CUBIC_TO,

  };

  hb_outline_point_t (float x, float y, type_t type) :

    x (x), y (y), type (type) {}

  float x, y;

  type_t type;

};

struct hb_outline_vector_t

{

  float normalize_len ()

  {

    float len = hypotf (x, y);

    if (len)

    {

      x /= len;

      y /= len;

    }

    return len;

  }

  float x, y;

};

struct hb_outline_t

{

  void reset () { points.shrink (0, false); contours.resize (0); }

  HB_INTERNAL void replay (hb_draw_funcs_t *pen, void *pen_data) const;

  HB_INTERNAL float control_area () const;

  HB_INTERNAL void slant (float slant_xy);

  HB_INTERNAL void embolden (float x_strength, float y_strength,

           float x_shift, float y_shift);

  hb_vector_t<hb_outline_point_t> points;

  hb_vector_t<unsigned> contours;

};

HB_INTERNAL hb_draw_funcs_t *

hb_outline_recording_pen_get_funcs ();

#endif /* HB_OUTLINE_HH */