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 | |
46 | uint64_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 | |
49 | DEFINE_NULL_NAMESPACE_BYTES (OT, Index) = {0xFF,0xFF}; |
50 | DEFINE_NULL_NAMESPACE_BYTES (OT, VarIdx) = {0xFF,0xFF,0xFF,0xFF}; |
51 | DEFINE_NULL_NAMESPACE_BYTES (OT, LangSys) = {0x00,0x00, 0xFF,0xFF, 0x00,0x00}; |
52 | DEFINE_NULL_NAMESPACE_BYTES (OT, RangeRecord) = {0x01}; |
53 | DEFINE_NULL_NAMESPACE_BYTES (OT, ClipRecord) = {0x01}; |
54 | DEFINE_NULL_NAMESPACE_BYTES (OT, CmapSubtableLongGroup) = {0x00,0x00,0x00,0x01, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00}; |
55 | DEFINE_NULL_NAMESPACE_BYTES (AAT, SettingName) = {0xFF,0xFF, 0xFF,0xFF}; |
56 | DEFINE_NULL_NAMESPACE_BYTES (AAT, Lookup) = {0xFF,0xFF}; |
57 | |
58 | |
59 | /* hb_map_t */ |
60 | |
61 | const hb_codepoint_t minus_1 = -1; |
62 | static const unsigned char static_endchar_str[] = {OpCode_endchar}; |
63 | const unsigned char *endchar_str = static_endchar_str; |
64 | |
65 | /* hb_face_t */ |
66 | |
67 | #ifndef HB_NO_BEYOND_64K |
68 | static inline unsigned |
69 | load_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 | |
86 | static inline unsigned |
87 | load_num_glyphs_from_maxp (const hb_face_t *face) |
88 | { |
89 | return face->table.maxp->get_num_glyphs (); |
90 | } |
91 | |
92 | unsigned int |
93 | hb_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 | |
107 | unsigned int |
108 | hb_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 |
117 | bool |
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 | |
124 | unsigned |
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 | |
131 | bool |
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 | |