1 | /* |
2 | * Copyright © 2009, 2023 Red Hat, Inc. |
3 | * Copyright © 2015 Google, Inc. |
4 | * |
5 | * Permission is hereby granted, without written agreement and without |
6 | * license or royalty fees, to use, copy, modify, and distribute this |
7 | * software and its documentation for any purpose, provided that the |
8 | * above copyright notice and the following two paragraphs appear in |
9 | * all copies of this software. |
10 | * |
11 | * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR |
12 | * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES |
13 | * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN |
14 | * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH |
15 | * DAMAGE. |
16 | * |
17 | * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, |
18 | * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
19 | * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS |
20 | * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO |
21 | * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
22 | * |
23 | * Red Hat Author(s): Behdad Esfahbod, Matthias Clasen |
24 | * Google Author(s): Behdad Esfahbod |
25 | */ |
26 | |
27 | #include <freetype/freetype.h> |
28 | #include <freetype/tttables.h> |
29 | |
30 | #ifdef FT_CONFIG_OPTION_USE_HARFBUZZ |
31 | |
32 | #include "ft-hb.h" |
33 | |
34 | /* The following three functions are a more or less verbatim |
35 | * copy of corresponding HarfBuzz code from hb-ft.cc |
36 | */ |
37 | |
38 | static hb_blob_t * |
39 | hb_ft_reference_table_ (hb_face_t *face, hb_tag_t tag, void *user_data) |
40 | { |
41 | FT_Face ft_face = (FT_Face) user_data; |
42 | FT_Byte *buffer; |
43 | FT_ULong length = 0; |
44 | FT_Error error; |
45 | |
46 | FT_UNUSED (face); |
47 | |
48 | /* Note: FreeType like HarfBuzz uses the NONE tag for fetching the entire blob */ |
49 | |
50 | error = FT_Load_Sfnt_Table (ft_face, tag, 0, NULL, &length); |
51 | if (error) |
52 | return NULL; |
53 | |
54 | buffer = (FT_Byte *) ft_smalloc (length); |
55 | if (!buffer) |
56 | return NULL; |
57 | |
58 | error = FT_Load_Sfnt_Table (ft_face, tag, 0, buffer, &length); |
59 | if (error) |
60 | { |
61 | free (buffer); |
62 | return NULL; |
63 | } |
64 | |
65 | return hb_blob_create ((const char *) buffer, length, |
66 | HB_MEMORY_MODE_WRITABLE, |
67 | buffer, ft_sfree); |
68 | } |
69 | |
70 | static hb_face_t * |
71 | hb_ft_face_create_ (FT_Face ft_face, |
72 | hb_destroy_func_t destroy) |
73 | { |
74 | hb_face_t *face; |
75 | |
76 | if (!ft_face->stream->read) { |
77 | hb_blob_t *blob; |
78 | |
79 | blob = hb_blob_create ((const char *) ft_face->stream->base, |
80 | (unsigned int) ft_face->stream->size, |
81 | HB_MEMORY_MODE_READONLY, |
82 | ft_face, destroy); |
83 | face = hb_face_create (blob, ft_face->face_index); |
84 | hb_blob_destroy (blob); |
85 | } else { |
86 | face = hb_face_create_for_tables (hb_ft_reference_table_, ft_face, destroy); |
87 | } |
88 | |
89 | hb_face_set_index (face, ft_face->face_index); |
90 | hb_face_set_upem (face, ft_face->units_per_EM); |
91 | |
92 | return face; |
93 | } |
94 | |
95 | FT_LOCAL_DEF(hb_font_t *) |
96 | hb_ft_font_create_ (FT_Face ft_face, |
97 | hb_destroy_func_t destroy) |
98 | { |
99 | hb_font_t *font; |
100 | hb_face_t *face; |
101 | |
102 | face = hb_ft_face_create_ (ft_face, destroy); |
103 | font = hb_font_create (face); |
104 | hb_face_destroy (face); |
105 | return font; |
106 | } |
107 | |
108 | #else /* !FT_CONFIG_OPTION_USE_HARFBUZZ */ |
109 | |
110 | /* ANSI C doesn't like empty source files */ |
111 | typedef int ft_hb_dummy_; |
112 | |
113 | #endif /* !FT_CONFIG_OPTION_USE_HARFBUZZ */ |
114 | |
115 | /* END */ |
116 | |