1/*
2 * Copyright © 2017 Google, Inc.
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 * Red Hat Author(s): Behdad Esfahbod
25 */
26
27#ifndef HB_OT_H_IN
28#error "Include <hb-ot.h> instead."
29#endif
30
31#ifndef HB_OT_VAR_H
32#define HB_OT_VAR_H
33
34#include "hb.h"
35
36HB_BEGIN_DECLS
37
38
39#define HB_OT_TAG_VAR_AXIS_ITALIC HB_TAG('i','t','a','l')
40#define HB_OT_TAG_VAR_AXIS_OPTICAL_SIZE HB_TAG('o','p','s','z')
41#define HB_OT_TAG_VAR_AXIS_SLANT HB_TAG('s','l','n','t')
42#define HB_OT_TAG_VAR_AXIS_WIDTH HB_TAG('w','d','t','h')
43#define HB_OT_TAG_VAR_AXIS_WEIGHT HB_TAG('w','g','h','t')
44
45
46/*
47 * fvar / avar
48 */
49
50/**
51 * hb_ot_var_axis_t:
52 *
53 * Since: 1.4.2
54 */
55typedef struct hb_ot_var_axis_t {
56 hb_tag_t tag;
57 unsigned int name_id;
58 float min_value;
59 float default_value;
60 float max_value;
61} hb_ot_var_axis_t;
62
63HB_EXTERN hb_bool_t
64hb_ot_var_has_data (hb_face_t *face);
65
66/**
67 * HB_OT_VAR_NO_AXIS_INDEX:
68 *
69 * Since: 1.4.2
70 */
71#define HB_OT_VAR_NO_AXIS_INDEX 0xFFFFFFFFu
72
73HB_EXTERN unsigned int
74hb_ot_var_get_axis_count (hb_face_t *face);
75
76HB_EXTERN unsigned int
77hb_ot_var_get_axes (hb_face_t *face,
78 unsigned int start_offset,
79 unsigned int *axes_count /* IN/OUT */,
80 hb_ot_var_axis_t *axes_array /* OUT */);
81
82HB_EXTERN hb_bool_t
83hb_ot_var_find_axis (hb_face_t *face,
84 hb_tag_t axis_tag,
85 unsigned int *axis_index,
86 hb_ot_var_axis_t *axis_info);
87
88
89HB_EXTERN void
90hb_ot_var_normalize_variations (hb_face_t *face,
91 const hb_variation_t *variations, /* IN */
92 unsigned int variations_length,
93 int *coords, /* OUT */
94 unsigned int coords_length);
95
96HB_EXTERN void
97hb_ot_var_normalize_coords (hb_face_t *face,
98 unsigned int coords_length,
99 const float *design_coords, /* IN */
100 int *normalized_coords /* OUT */);
101
102
103HB_END_DECLS
104
105#endif /* HB_OT_VAR_H */
106