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
|
/*
* Copyright © 2009 Red Hat, Inc.
* Copyright © 2015 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
* Google Author(s): Behdad Esfahbod
*/
#ifndef HB_FT_H
#define HB_FT_H
#include "hb.h"
#include <ft2build.h>
#include FT_FREETYPE_H
HB_BEGIN_DECLS
/*
* Note: FreeType is not thread-safe.
* Hence, these functions are not either.
*/
/*
* hb-face from ft-face.
*/
/* This one creates a new hb-face for given ft-face.
* When the returned hb-face is destroyed, the destroy
* callback is called (if not NULL), with the ft-face passed
* to it.
*
* The client is responsible to make sure that ft-face is
* destroyed after hb-face is destroyed.
*
* Most often you don't want this function. You should use either
* hb_ft_face_create_cached(), or hb_ft_face_create_referenced().
* In particular, if you are going to pass NULL as destroy, you
* probably should use (the more recent) hb_ft_face_create_referenced()
* instead.
*/
HB_EXTERN hb_face_t *
hb_ft_face_create (FT_Face ft_face,
hb_destroy_func_t destroy);
/* This version is like hb_ft_face_create(), except that it caches
* the hb-face using the generic pointer of the ft-face. This means
* that subsequent calls to this function with the same ft-face will
* return the same hb-face (correctly referenced).
*
* Client is still responsible for making sure that ft-face is destroyed
* after hb-face is.
*/
HB_EXTERN hb_face_t *
hb_ft_face_create_cached (FT_Face ft_face);
/* This version is like hb_ft_face_create(), except that it calls
* FT_Reference_Face() on ft-face, as such keeping ft-face alive
* as long as the hb-face is.
*
* This is the most convenient version to use. Use it unless you have
* very good reasons not to.
*/
HB_EXTERN hb_face_t *
hb_ft_face_create_referenced (FT_Face ft_face);
/*
* hb-font from ft-face.
*/
/*
* Note:
*
* Set face size on ft-face before creating hb-font from it.
* Otherwise hb-ft would NOT pick up the font size correctly.
*/
/* See notes on hb_ft_face_create(). Same issues re lifecycle-management
* apply here. Use hb_ft_font_create_referenced() if you can. */
HB_EXTERN hb_font_t *
hb_ft_font_create (FT_Face ft_face,
hb_destroy_func_t destroy);
/* See notes on hb_ft_face_create_referenced() re lifecycle-management
* issues. */
HB_EXTERN hb_font_t *
hb_ft_font_create_referenced (FT_Face ft_face);
HB_EXTERN FT_Face
hb_ft_font_get_face (hb_font_t *font);
HB_EXTERN FT_Face
hb_ft_font_lock_face (hb_font_t *font);
HB_EXTERN void
hb_ft_font_unlock_face (hb_font_t *font);
HB_EXTERN void
hb_ft_font_set_load_flags (hb_font_t *font, int load_flags);
HB_EXTERN int
hb_ft_font_get_load_flags (hb_font_t *font);
/* Call when size or variations settings on underlying FT_Face changed,
* and you want to update the hb_font_t from it. */
HB_EXTERN void
hb_ft_font_changed (hb_font_t *font);
/* Call when size or variations settings on underlying hb_font_t may have
* changed, and you want to update the FT_Face from it. This call is fast
* if nothing changed on hb_font_t. Returns true if changed. */
HB_EXTERN hb_bool_t
hb_ft_hb_font_changed (hb_font_t *font);
/* Makes an hb_font_t use FreeType internally to implement font functions.
* Note: this internally creates an FT_Face. Use it when you create your
* hb_face_t using hb_face_create(). */
HB_EXTERN void
hb_ft_font_set_funcs (hb_font_t *font);
HB_END_DECLS
#endif /* HB_FT_H */
|
