2 * Copyright © 2018 Google, Inc.
4 * This is part of HarfBuzz, a text shaping library.
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.
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
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.
24 * Google Author(s): Behdad Esfahbod
29 #include "hb-open-type.hh"
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"
43 #ifndef HB_NO_VISIBILITY
44 #include "hb-ot-name-language-static.hh"
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)] = {};
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};
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;
67 #ifndef HB_NO_BEYOND_64K
68 static inline unsigned
69 load_num_glyphs_from_loca (const hb_face_t *face)
73 unsigned indexToLocFormat = face->table.head->indexToLocFormat;
75 if (indexToLocFormat <= 1)
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;
86 static inline unsigned
87 load_num_glyphs_from_maxp (const hb_face_t *face)
89 return face->table.maxp->get_num_glyphs ();
93 hb_face_t::load_num_glyphs () const
97 #ifndef HB_NO_BEYOND_64K
98 ret = hb_max (ret, load_num_glyphs_from_loca (this));
101 ret = hb_max (ret, load_num_glyphs_from_maxp (this));
108 hb_face_t::load_upem () const
110 unsigned int ret = table.head->get_upem ();
118 _glyf_get_leading_bearing_with_var_unscaled (hb_font_t *font, hb_codepoint_t glyph, bool is_vertical,
121 return font->face->table.glyf->get_leading_bearing_with_var_unscaled (font, glyph, is_vertical, lsb);
125 _glyf_get_advance_with_var_unscaled (hb_font_t *font, hb_codepoint_t glyph, bool is_vertical)
127 return font->face->table.glyf->get_advance_with_var_unscaled (font, glyph, is_vertical);
132 _glyf_get_leading_bearing_without_var_unscaled (hb_face_t *face, hb_codepoint_t gid, bool is_vertical, int *lsb)
134 return face->table.glyf->get_leading_bearing_without_var_unscaled (gid, is_vertical, lsb);