hb-ot-var.h
5.09 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
/*
* Copyright © 2017 Google, Inc.
*
* 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.
*
* Red Hat Author(s): Behdad Esfahbod
*/
#if !defined(HB_OT_H_IN) && !defined(HB_NO_SINGLE_HEADER_ERROR)
#error "Include <hb-ot.h> instead."
#endif
#ifndef HB_OT_VAR_H
#define HB_OT_VAR_H
#include "hb.h"
HB_BEGIN_DECLS
/**
* HB_OT_TAG_VAR_AXIS_ITALIC:
*
* Registered tag for the roman/italic axis.
*/
#define HB_OT_TAG_VAR_AXIS_ITALIC HB_TAG('i','t','a','l')
/**
* HB_OT_TAG_VAR_AXIS_OPTICAL_SIZE:
*
* Registered tag for the optical-size axis.
* <note>Note: The optical-size axis supersedes the OpenType `size` feature.</note>
*/
#define HB_OT_TAG_VAR_AXIS_OPTICAL_SIZE HB_TAG('o','p','s','z')
/**
* HB_OT_TAG_VAR_AXIS_SLANT:
*
* Registered tag for the slant axis
*/
#define HB_OT_TAG_VAR_AXIS_SLANT HB_TAG('s','l','n','t')
/**
* HB_OT_TAG_VAR_AXIS_WIDTH:
*
* Registered tag for the width axis.
*/
#define HB_OT_TAG_VAR_AXIS_WIDTH HB_TAG('w','d','t','h')
/**
* HB_OT_TAG_VAR_AXIS_WEIGHT:
*
* Registered tag for the weight axis.
*/
#define HB_OT_TAG_VAR_AXIS_WEIGHT HB_TAG('w','g','h','t')
/*
* fvar / avar
*/
HB_EXTERN hb_bool_t
hb_ot_var_has_data (hb_face_t *face);
/*
* Variation axes.
*/
HB_EXTERN unsigned int
hb_ot_var_get_axis_count (hb_face_t *face);
/**
* hb_ot_var_axis_flags_t:
* @HB_OT_VAR_AXIS_FLAG_HIDDEN: The axis should not be exposed directly in user interfaces.
*
* Flags for #hb_ot_var_axis_info_t.
*
* Since: 2.2.0
*/
typedef enum { /*< flags >*/
HB_OT_VAR_AXIS_FLAG_HIDDEN = 0x00000001u,
/*< private >*/
_HB_OT_VAR_AXIS_FLAG_MAX_VALUE= HB_TAG_MAX_SIGNED /*< skip >*/
} hb_ot_var_axis_flags_t;
/**
* hb_ot_var_axis_info_t:
* @axis_index: Index of the axis in the variation-axis array
* @tag: The #hb_tag_t tag identifying the design variation of the axis
* @name_id: The `name` table Name ID that provides display names for the axis
* @flags: The #hb_ot_var_axis_flags_t flags for the axis
* @min_value: The mininum value on the variation axis that the font covers
* @default_value: The position on the variation axis corresponding to the font's defaults
* @max_value: The maximum value on the variation axis that the font covers
*
* Data type for holding variation-axis values.
*
* The minimum, default, and maximum values are in un-normalized, user scales.
*
* <note>Note: at present, the only flag defined for @flags is
* #HB_OT_VAR_AXIS_FLAG_HIDDEN.</note>
*
* Since: 2.2.0
*/
typedef struct hb_ot_var_axis_info_t {
unsigned int axis_index;
hb_tag_t tag;
hb_ot_name_id_t name_id;
hb_ot_var_axis_flags_t flags;
float min_value;
float default_value;
float max_value;
/*< private >*/
unsigned int reserved;
} hb_ot_var_axis_info_t;
HB_EXTERN unsigned int
hb_ot_var_get_axis_infos (hb_face_t *face,
unsigned int start_offset,
unsigned int *axes_count /* IN/OUT */,
hb_ot_var_axis_info_t *axes_array /* OUT */);
HB_EXTERN hb_bool_t
hb_ot_var_find_axis_info (hb_face_t *face,
hb_tag_t axis_tag,
hb_ot_var_axis_info_t *axis_info);
/*
* Named instances.
*/
HB_EXTERN unsigned int
hb_ot_var_get_named_instance_count (hb_face_t *face);
HB_EXTERN hb_ot_name_id_t
hb_ot_var_named_instance_get_subfamily_name_id (hb_face_t *face,
unsigned int instance_index);
HB_EXTERN hb_ot_name_id_t
hb_ot_var_named_instance_get_postscript_name_id (hb_face_t *face,
unsigned int instance_index);
HB_EXTERN unsigned int
hb_ot_var_named_instance_get_design_coords (hb_face_t *face,
unsigned int instance_index,
unsigned int *coords_length, /* IN/OUT */
float *coords /* OUT */);
/*
* Conversions.
*/
HB_EXTERN void
hb_ot_var_normalize_variations (hb_face_t *face,
const hb_variation_t *variations, /* IN */
unsigned int variations_length,
int *coords, /* OUT */
unsigned int coords_length);
HB_EXTERN void
hb_ot_var_normalize_coords (hb_face_t *face,
unsigned int coords_length,
const float *design_coords, /* IN */
int *normalized_coords /* OUT */);
HB_END_DECLS
#endif /* HB_OT_VAR_H */