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The Tor Browser
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hb-outline.hh (2164B)

      1 /*
      2 * Copyright © 2023  Behdad Esfahbod
      3 *
      4 *  This is part of HarfBuzz, a text shaping library.
      5 *
      6 * Permission is hereby granted, without written agreement and without
      7 * license or royalty fees, to use, copy, modify, and distribute this
      8 * software and its documentation for any purpose, provided that the
      9 * above copyright notice and the following two paragraphs appear in
     10 * all copies of this software.
     11 *
     12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
     13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
     14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
     15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
     16 * DAMAGE.
     17 *
     18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
     19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
     20 * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
     21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
     22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
     23 */
     24 
     25 #ifndef HB_OUTLINE_HH
     26 #define HB_OUTLINE_HH
     27 
     28 #include "hb.hh"
     29 
     30 #include "hb-draw.hh"
     31 
     32 
     33 struct hb_outline_point_t
     34 {
     35  enum class type_t
     36  {
     37    MOVE_TO,
     38    LINE_TO,
     39    QUADRATIC_TO,
     40    CUBIC_TO,
     41  };
     42 
     43  hb_outline_point_t (float x, float y, type_t type) :
     44    x (x), y (y), type (type) {}
     45 
     46  float x, y;
     47  type_t type;
     48 };
     49 
     50 struct hb_outline_vector_t
     51 {
     52  float normalize_len ()
     53  {
     54    float len = hypotf (x, y);
     55    if (len)
     56    {
     57      x /= len;
     58      y /= len;
     59    }
     60    return len;
     61  }
     62 
     63  float x, y;
     64 };
     65 
     66 struct hb_outline_t
     67 {
     68  void reset () { points.shrink (0, false); contours.resize (0); }
     69 
     70  HB_INTERNAL void replay (hb_draw_funcs_t *pen, void *pen_data) const;
     71  HB_INTERNAL float control_area () const;
     72  HB_INTERNAL void translate (float dx, float dy);
     73  HB_INTERNAL void slant (float slant_xy);
     74  HB_INTERNAL void embolden (float x_strength, float y_strength,
     75 		     float x_shift, float y_shift);
     76 
     77  hb_vector_t<hb_outline_point_t> points;
     78  hb_vector_t<unsigned> contours;
     79 };
     80 
     81 HB_INTERNAL hb_draw_funcs_t *
     82 hb_outline_recording_pen_get_funcs ();
     83 
     84 
     85 #endif /* HB_OUTLINE_HH */