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
|
/*
* Copyright © 2022 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.
*
* Google Author(s): Behdad Esfahbod
*/
#ifndef HELPER_CAIRO_FT_HH
#define HELPER_CAIRO_FT_HH
#include "font-options.hh"
#include <cairo-ft.h>
#include <hb-ft.h>
#include FT_MULTIPLE_MASTERS_H
static FT_Library ft_library;
#ifdef HAVE_ATEXIT
static inline
void free_ft_library ()
{
FT_Done_FreeType (ft_library);
}
#endif
static inline cairo_font_face_t *
helper_cairo_create_ft_font_face (const font_options_t *font_opts)
{
cairo_font_face_t *cairo_face;
/* We cannot use the FT_Face from hb_font_t, as doing so will confuse hb_font_t because
* cairo will reset the face size. As such, create new face...
* TODO Perhaps add API to hb-ft to encapsulate this code. */
FT_Face ft_face = nullptr;//hb_ft_font_get_face (font);
if (!ft_face)
{
if (!ft_library)
{
FT_Init_FreeType (&ft_library);
#ifdef HAVE_ATEXIT
atexit (free_ft_library);
#endif
}
unsigned int blob_length;
const char *blob_data = hb_blob_get_data (font_opts->blob, &blob_length);
if (FT_New_Memory_Face (ft_library,
(const FT_Byte *) blob_data,
blob_length,
font_opts->face_index,
&ft_face))
fail (false, "FT_New_Memory_Face fail");
}
if (!ft_face)
{
/* This allows us to get some boxes at least... */
cairo_face = cairo_toy_font_face_create ("@cairo:sans",
CAIRO_FONT_SLANT_NORMAL,
CAIRO_FONT_WEIGHT_NORMAL);
}
else
{
#if !defined(HB_NO_VAR) && defined(HAVE_FT_SET_VAR_BLEND_COORDINATES)
unsigned int num_coords;
const float *coords = hb_font_get_var_coords_design (font_opts->font, &num_coords);
if (num_coords)
{
FT_Fixed *ft_coords = (FT_Fixed *) calloc (num_coords, sizeof (FT_Fixed));
if (ft_coords)
{
for (unsigned int i = 0; i < num_coords; i++)
ft_coords[i] = coords[i] * 65536.f;
FT_Set_Var_Design_Coordinates (ft_face, num_coords, ft_coords);
free (ft_coords);
}
}
#endif
cairo_face = cairo_ft_font_face_create_for_ft_face (ft_face, font_opts->ft_load_flags);
}
return cairo_face;
}
static inline bool
helper_cairo_ft_scaled_font_has_color (cairo_scaled_font_t *scaled_font)
{
bool ret = false;
#ifdef FT_HAS_COLOR
FT_Face ft_face = cairo_ft_scaled_font_lock_face (scaled_font);
if (ft_face)
{
if (FT_HAS_COLOR (ft_face))
ret = true;
cairo_ft_scaled_font_unlock_face (scaled_font);
}
#endif
return ret;
}
#endif
|
