kc3-lang/harfbuzz/src/hb-outline.hh

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• Hash : 1a9e2175
  Author :
  Date : 2025-04-22T19:52:21
  

  [font/draw] Move slanting to font layer
  
  I moved it to the draw layer in 11.0.0; That was a bad design:
  font-funcs should NOT be responsible for synthetic bold & slant.
  
  This design reverts that and makes the font layer apply it,
  using a recording.
  
  This is a minor API change from 11.0.0 since hb_draw_state_t::slant_xy
  which was introduced in 11.0.0, is removed now. I believe no client
  had started using it. It was only relevant to other font-funcs draw
  implementations.
  

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• src/hb-outline.hh

• /*
   * 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 */
  

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