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 #include "hb-open-type.hh"
30 #include "hb-face.hh"
31
32 #include "hb-aat-layout-common.hh"
33 #include "hb-aat-layout-feat-table.hh"
34 #include "hb-ot-layout-common.hh"
35 #include "hb-ot-cmap-table.hh"
36 #include "hb-ot-head-table.hh"
37 #include "hb-ot-maxp-table.hh"
38
39 #ifndef HB_NO_VISIBILITY
40 #include "hb-ot-name-language-static.hh"
41
42 uint64_t const _hb_NullPool[(HB_NULL_POOL_SIZE + sizeof (uint64_t) - 1) / sizeof (uint64_t)] = {};
43 /*thread_local*/ uint64_t _hb_CrapPool[(HB_NULL_POOL_SIZE + sizeof (uint64_t) - 1) / sizeof (uint64_t)] = {};
44
45 DEFINE_NULL_NAMESPACE_BYTES (OT, Index) = {0xFF,0xFF};
46 DEFINE_NULL_NAMESPACE_BYTES (OT, VarIdx) = {0xFF,0xFF,0xFF,0xFF};
47 DEFINE_NULL_NAMESPACE_BYTES (OT, LangSys) = {0x00,0x00, 0xFF,0xFF, 0x00,0x00};
48 DEFINE_NULL_NAMESPACE_BYTES (OT, RangeRecord) = {0x00,0x01, 0x00,0x00, 0x00, 0x00};
49 DEFINE_NULL_NAMESPACE_BYTES (OT, CmapSubtableLongGroup) = {0x00,0x00,0x00,0x01, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00};
50 DEFINE_NULL_NAMESPACE_BYTES (AAT, SettingName) = {0xFF,0xFF, 0xFF,0xFF};
51 /* Hand-coded because Lookup is a template. Sad. */
52 const unsigned char _hb_Null_AAT_Lookup[2] = {0xFF, 0xFF};
53
54
55
56 /* hb_face_t */
57
58 unsigned int
load_num_glyphs() const59 hb_face_t::load_num_glyphs () const
60 {
61 hb_sanitize_context_t c = hb_sanitize_context_t ();
62 c.set_num_glyphs (0); /* So we don't recurse ad infinitum. */
63 hb_blob_t *maxp_blob = c.reference_table<OT::maxp> (this);
64 const OT::maxp *maxp_table = maxp_blob->as<OT::maxp> ();
65
66 unsigned int ret = maxp_table->get_num_glyphs ();
67 num_glyphs.set_relaxed (ret);
68 hb_blob_destroy (maxp_blob);
69 return ret;
70 }
71
72 unsigned int
load_upem() const73 hb_face_t::load_upem () const
74 {
75 unsigned int ret = table.head->get_upem ();
76 upem.set_relaxed (ret);
77 return ret;
78 }
79
80
81 /* hb_user_data_array_t */
82
83 bool
set(hb_user_data_key_t * key,void * data,hb_destroy_func_t destroy,hb_bool_t replace)84 hb_user_data_array_t::set (hb_user_data_key_t *key,
85 void * data,
86 hb_destroy_func_t destroy,
87 hb_bool_t replace)
88 {
89 if (!key)
90 return false;
91
92 if (replace) {
93 if (!data && !destroy) {
94 items.remove (key, lock);
95 return true;
96 }
97 }
98 hb_user_data_item_t item = {key, data, destroy};
99 bool ret = !!items.replace_or_insert (item, lock, (bool) replace);
100
101 return ret;
102 }
103
104 void *
get(hb_user_data_key_t * key)105 hb_user_data_array_t::get (hb_user_data_key_t *key)
106 {
107 hb_user_data_item_t item = {nullptr, nullptr, nullptr};
108
109 return items.find (key, &item, lock) ? item.data : nullptr;
110 }
111
112
113 #endif
114