1 /*
2 * Copyright © 2018 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 * Google Author(s): Behdad Esfahbod
25 */
26
27 #include "hb.hh"
28
29 #ifndef HB_NO_NAME
30
31 #include "hb-ot-name-table.hh"
32
33 #include "hb-utf.hh"
34
35
36 /**
37 * SECTION:hb-ot-name
38 * @title: hb-ot-name
39 * @short_description: OpenType font name information
40 * @include: hb-ot.h
41 *
42 * Functions for fetching name strings from OpenType fonts.
43 **/
44
45
46 /**
47 * hb_ot_name_list_names:
48 * @face: font face.
49 * @num_entries: (out) (optional): number of returned entries.
50 *
51 * Enumerates all available name IDs and language combinations. Returned
52 * array is owned by the @face and should not be modified. It can be
53 * used as long as @face is alive.
54 *
55 * Returns: (transfer none) (array length=num_entries): Array of available name entries.
56 * Since: 2.1.0
57 **/
58 const hb_ot_name_entry_t *
hb_ot_name_list_names(hb_face_t * face,unsigned int * num_entries)59 hb_ot_name_list_names (hb_face_t *face,
60 unsigned int *num_entries /* OUT */)
61 {
62 const OT::name_accelerator_t &name = *face->table.name;
63 if (num_entries) *num_entries = name.names.length;
64 return (const hb_ot_name_entry_t *) name.names;
65 }
66
67 template <typename utf_t>
68 static inline unsigned int
hb_ot_name_get_utf(hb_face_t * face,hb_ot_name_id_t name_id,hb_language_t language,unsigned int * text_size,typename utf_t::codepoint_t * text)69 hb_ot_name_get_utf (hb_face_t *face,
70 hb_ot_name_id_t name_id,
71 hb_language_t language,
72 unsigned int *text_size /* IN/OUT */,
73 typename utf_t::codepoint_t *text /* OUT */)
74 {
75 const OT::name_accelerator_t &name = *face->table.name;
76
77 if (!language)
78 language = hb_language_from_string ("en", 2);
79
80 unsigned int width;
81 int idx = name.get_index (name_id, language, &width);
82 if (idx != -1)
83 {
84 hb_bytes_t bytes = name.get_name (idx);
85
86 if (width == 2) /* UTF16-BE */
87 return OT::hb_ot_name_convert_utf<hb_utf16_be_t, utf_t> (bytes, text_size, text);
88
89 if (width == 1) /* ASCII */
90 return OT::hb_ot_name_convert_utf<hb_ascii_t, utf_t> (bytes, text_size, text);
91 }
92
93 if (text_size)
94 {
95 if (*text_size)
96 *text = 0;
97 *text_size = 0;
98 }
99 return 0;
100 }
101
102 /**
103 * hb_ot_name_get_utf8:
104 * @face: font face.
105 * @name_id: OpenType name identifier to fetch.
106 * @language: language to fetch the name for.
107 * @text_size: (inout) (optional): input size of @text buffer, and output size of
108 * text written to buffer.
109 * @text: (out caller-allocates) (array length=text_size): buffer to write fetched name into.
110 *
111 * Fetches a font name from the OpenType 'name' table.
112 * If @language is #HB_LANGUAGE_INVALID, English ("en") is assumed.
113 * Returns string in UTF-8 encoding. A NUL terminator is always written
114 * for convenience, and isn't included in the output @text_size.
115 *
116 * Returns: full length of the requested string, or 0 if not found.
117 * Since: 2.1.0
118 **/
119 unsigned int
hb_ot_name_get_utf8(hb_face_t * face,hb_ot_name_id_t name_id,hb_language_t language,unsigned int * text_size,char * text)120 hb_ot_name_get_utf8 (hb_face_t *face,
121 hb_ot_name_id_t name_id,
122 hb_language_t language,
123 unsigned int *text_size /* IN/OUT */,
124 char *text /* OUT */)
125 {
126 return hb_ot_name_get_utf<hb_utf8_t> (face, name_id, language, text_size,
127 (hb_utf8_t::codepoint_t *) text);
128 }
129
130 /**
131 * hb_ot_name_get_utf16:
132 * @face: font face.
133 * @name_id: OpenType name identifier to fetch.
134 * @language: language to fetch the name for.
135 * @text_size: (inout) (optional): input size of @text buffer, and output size of
136 * text written to buffer.
137 * @text: (out caller-allocates) (array length=text_size): buffer to write fetched name into.
138 *
139 * Fetches a font name from the OpenType 'name' table.
140 * If @language is #HB_LANGUAGE_INVALID, English ("en") is assumed.
141 * Returns string in UTF-16 encoding. A NUL terminator is always written
142 * for convenience, and isn't included in the output @text_size.
143 *
144 * Returns: full length of the requested string, or 0 if not found.
145 * Since: 2.1.0
146 **/
147 unsigned int
hb_ot_name_get_utf16(hb_face_t * face,hb_ot_name_id_t name_id,hb_language_t language,unsigned int * text_size,uint16_t * text)148 hb_ot_name_get_utf16 (hb_face_t *face,
149 hb_ot_name_id_t name_id,
150 hb_language_t language,
151 unsigned int *text_size /* IN/OUT */,
152 uint16_t *text /* OUT */)
153 {
154 return hb_ot_name_get_utf<hb_utf16_t> (face, name_id, language, text_size, text);
155 }
156
157 /**
158 * hb_ot_name_get_utf32:
159 * @face: font face.
160 * @name_id: OpenType name identifier to fetch.
161 * @language: language to fetch the name for.
162 * @text_size: (inout) (optional): input size of @text buffer, and output size of
163 * text written to buffer.
164 * @text: (out caller-allocates) (array length=text_size): buffer to write fetched name into.
165 *
166 * Fetches a font name from the OpenType 'name' table.
167 * If @language is #HB_LANGUAGE_INVALID, English ("en") is assumed.
168 * Returns string in UTF-32 encoding. A NUL terminator is always written
169 * for convenience, and isn't included in the output @text_size.
170 *
171 * Returns: full length of the requested string, or 0 if not found.
172 * Since: 2.1.0
173 **/
174 unsigned int
hb_ot_name_get_utf32(hb_face_t * face,hb_ot_name_id_t name_id,hb_language_t language,unsigned int * text_size,uint32_t * text)175 hb_ot_name_get_utf32 (hb_face_t *face,
176 hb_ot_name_id_t name_id,
177 hb_language_t language,
178 unsigned int *text_size /* IN/OUT */,
179 uint32_t *text /* OUT */)
180 {
181 return hb_ot_name_get_utf<hb_utf32_t> (face, name_id, language, text_size, text);
182 }
183
184 #endif
185