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
33struct 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
50struct 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
66struct 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 embolden (float x_strength, float y_strength,
73 float x_shift, float y_shift);
74
75 hb_vector_t<hb_outline_point_t> points;
76 hb_vector_t<unsigned> contours;
77};
78
79HB_INTERNAL hb_draw_funcs_t *
80hb_outline_recording_pen_get_funcs ();
81
82
83#endif /* HB_OUTLINE_HH */
84