1/*
2 * Copyright © 2019-2020 Ebrahim Byagowi
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_H_IN
26#error "Include <hb.h> instead."
27#endif
28
29#ifndef HB_DRAW_H
30#define HB_DRAW_H
31
32#include "hb.h"
33
34HB_BEGIN_DECLS
35
36#ifdef HB_EXPERIMENTAL_API
37typedef void (*hb_draw_move_to_func_t) (hb_position_t to_x, hb_position_t to_y, void *user_data);
38typedef void (*hb_draw_line_to_func_t) (hb_position_t to_x, hb_position_t to_y, void *user_data);
39typedef void (*hb_draw_quadratic_to_func_t) (hb_position_t control_x, hb_position_t control_y,
40 hb_position_t to_x, hb_position_t to_y,
41 void *user_data);
42typedef void (*hb_draw_cubic_to_func_t) (hb_position_t control1_x, hb_position_t control1_y,
43 hb_position_t control2_x, hb_position_t control2_y,
44 hb_position_t to_x, hb_position_t to_y,
45 void *user_data);
46typedef void (*hb_draw_close_path_func_t) (void *user_data);
47
48/**
49 * hb_draw_funcs_t:
50 *
51 * Glyph draw callbacks.
52 *
53 * _move_to, _line_to and _cubic_to calls are nessecary to be defined but we
54 * translate _quadratic_to calls to _cubic_to if the callback isn't defined.
55 *
56 * Since: EXPERIMENTAL
57 **/
58typedef struct hb_draw_funcs_t hb_draw_funcs_t;
59
60HB_EXTERN void
61hb_draw_funcs_set_move_to_func (hb_draw_funcs_t *funcs,
62 hb_draw_move_to_func_t move_to);
63
64HB_EXTERN void
65hb_draw_funcs_set_line_to_func (hb_draw_funcs_t *funcs,
66 hb_draw_line_to_func_t line_to);
67
68HB_EXTERN void
69hb_draw_funcs_set_quadratic_to_func (hb_draw_funcs_t *funcs,
70 hb_draw_quadratic_to_func_t quadratic_to);
71
72HB_EXTERN void
73hb_draw_funcs_set_cubic_to_func (hb_draw_funcs_t *funcs,
74 hb_draw_cubic_to_func_t cubic_to);
75
76HB_EXTERN void
77hb_draw_funcs_set_close_path_func (hb_draw_funcs_t *funcs,
78 hb_draw_close_path_func_t close_path);
79
80HB_EXTERN hb_draw_funcs_t *
81hb_draw_funcs_create (void);
82
83HB_EXTERN hb_draw_funcs_t *
84hb_draw_funcs_reference (hb_draw_funcs_t *funcs);
85
86HB_EXTERN void
87hb_draw_funcs_destroy (hb_draw_funcs_t *funcs);
88
89HB_EXTERN void
90hb_draw_funcs_make_immutable (hb_draw_funcs_t *funcs);
91
92HB_EXTERN hb_bool_t
93hb_draw_funcs_is_immutable (hb_draw_funcs_t *funcs);
94#endif
95
96HB_END_DECLS
97
98#endif /* HB_DRAW_H */
99

source code of include/harfbuzz/hb-draw.h