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-cff-interp-common.hh"
35#include "hb-ot-layout-common.hh"
36#include "hb-ot-cmap-table.hh"
37#include "OT/Color/COLR/COLR.hh"
38#include "hb-ot-glyf-table.hh"
39#include "hb-ot-head-table.hh"
40#include "hb-ot-hmtx-table.hh"
41#include "hb-ot-maxp-table.hh"
42
43#ifndef HB_NO_VISIBILITY
44#include "hb-ot-name-language-static.hh"
45
46uint64_t const _hb_NullPool[(HB_NULL_POOL_SIZE + sizeof (uint64_t) - 1) / sizeof (uint64_t)] = {};
47/*thread_local*/ uint64_t _hb_CrapPool[(HB_NULL_POOL_SIZE + sizeof (uint64_t) - 1) / sizeof (uint64_t)] = {};
48
49DEFINE_NULL_NAMESPACE_BYTES (OT, Index) = {0xFF,0xFF};
50DEFINE_NULL_NAMESPACE_BYTES (OT, VarIdx) = {0xFF,0xFF,0xFF,0xFF};
51DEFINE_NULL_NAMESPACE_BYTES (OT, LangSys) = {0x00,0x00, 0xFF,0xFF, 0x00,0x00};
52DEFINE_NULL_NAMESPACE_BYTES (OT, RangeRecord) = {0x01};
53DEFINE_NULL_NAMESPACE_BYTES (OT, ClipRecord) = {0x01};
54DEFINE_NULL_NAMESPACE_BYTES (OT, CmapSubtableLongGroup) = {0x00,0x00,0x00,0x01, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00};
55DEFINE_NULL_NAMESPACE_BYTES (AAT, SettingName) = {0xFF,0xFF, 0xFF,0xFF};
56DEFINE_NULL_NAMESPACE_BYTES (AAT, Lookup) = {0xFF,0xFF};
57
58
59/* hb_map_t */
60
61const hb_codepoint_t minus_1 = -1;
62static const unsigned char static_endchar_str[] = {OpCode_endchar};
63const unsigned char *endchar_str = static_endchar_str;
64
65/* hb_face_t */
66
67#ifndef HB_NO_BEYOND_64K
68static inline unsigned
69load_num_glyphs_from_loca (const hb_face_t *face)
70{
71 unsigned ret = 0;
72
73 unsigned indexToLocFormat = face->table.head->indexToLocFormat;
74
75 if (indexToLocFormat <= 1)
76 {
77 bool short_offset = 0 == indexToLocFormat;
78 hb_blob_t *loca_blob = face->table.loca.get_blob ();
79 ret = hb_max (1u, loca_blob->length / (short_offset ? 2 : 4)) - 1;
80 }
81
82 return ret;
83}
84#endif
85
86static inline unsigned
87load_num_glyphs_from_maxp (const hb_face_t *face)
88{
89 return face->table.maxp->get_num_glyphs ();
90}
91
92unsigned int
93hb_face_t::load_num_glyphs () const
94{
95 unsigned ret = 0;
96
97#ifndef HB_NO_BEYOND_64K
98 ret = hb_max (ret, load_num_glyphs_from_loca (this));
99#endif
100
101 ret = hb_max (ret, load_num_glyphs_from_maxp (this));
102
103 num_glyphs = ret;
104 return ret;
105}
106
107unsigned int
108hb_face_t::load_upem () const
109{
110 unsigned int ret = table.head->get_upem ();
111 upem = ret;
112 return ret;
113}
114
115
116#ifndef HB_NO_VAR
117bool
118_glyf_get_leading_bearing_with_var_unscaled (hb_font_t *font, hb_codepoint_t glyph, bool is_vertical,
119 int *lsb)
120{
121 return font->face->table.glyf->get_leading_bearing_with_var_unscaled (font, glyph, is_vertical, lsb);
122}
123
124unsigned
125_glyf_get_advance_with_var_unscaled (hb_font_t *font, hb_codepoint_t glyph, bool is_vertical)
126{
127 return font->face->table.glyf->get_advance_with_var_unscaled (font, glyph, is_vertical);
128}
129#endif
130
131bool
132_glyf_get_leading_bearing_without_var_unscaled (hb_face_t *face, hb_codepoint_t gid, bool is_vertical, int *lsb)
133{
134 return face->table.glyf->get_leading_bearing_without_var_unscaled (gid, is_vertical, lsb);
135}
136
137
138#endif
139