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comparison mupdf-source/thirdparty/harfbuzz/src/OT/Layout/Common/CoverageFormat1.hh @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1:1d09e1dec1d9 2:b50eed0cc0ef
1 /*
2 * Copyright © 2007,2008,2009 Red Hat, Inc.
3 * Copyright © 2010,2012 Google, Inc.
4 *
5 * This is part of HarfBuzz, a text shaping library.
6 *
7 * Permission is hereby granted, without written agreement and without
8 * license or royalty fees, to use, copy, modify, and distribute this
9 * software and its documentation for any purpose, provided that the
10 * above copyright notice and the following two paragraphs appear in
11 * all copies of this software.
12 *
13 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
14 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
15 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
16 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
17 * DAMAGE.
18 *
19 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
20 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
21 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
22 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
23 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
24 *
25 * Red Hat Author(s): Behdad Esfahbod
26 * Google Author(s): Behdad Esfahbod, Garret Rieger
27 */
28
29
30 #ifndef OT_LAYOUT_COMMON_COVERAGEFORMAT1_HH
31 #define OT_LAYOUT_COMMON_COVERAGEFORMAT1_HH
32
33 namespace OT {
34 namespace Layout {
35 namespace Common {
36
37 #define NOT_COVERED ((unsigned int) -1)
38
39 template <typename Types>
40 struct CoverageFormat1_3
41 {
42 friend struct Coverage;
43
44 protected:
45 HBUINT16 coverageFormat; /* Format identifier--format = 1 */
46 SortedArray16Of<typename Types::HBGlyphID>
47 glyphArray; /* Array of GlyphIDs--in numerical order */
48 public:
49 DEFINE_SIZE_ARRAY (4, glyphArray);
50
51 private:
52 bool sanitize (hb_sanitize_context_t *c) const
53 {
54 TRACE_SANITIZE (this);
55 return_trace (glyphArray.sanitize (c));
56 }
57
58 unsigned int get_coverage (hb_codepoint_t glyph_id) const
59 {
60 unsigned int i;
61 glyphArray.bfind (glyph_id, &i, HB_NOT_FOUND_STORE, NOT_COVERED);
62 return i;
63 }
64
65 unsigned get_population () const
66 {
67 return glyphArray.len;
68 }
69
70 template <typename Iterator,
71 hb_requires (hb_is_sorted_source_of (Iterator, hb_codepoint_t))>
72 bool serialize (hb_serialize_context_t *c, Iterator glyphs)
73 {
74 TRACE_SERIALIZE (this);
75 return_trace (glyphArray.serialize (c, glyphs));
76 }
77
78 bool intersects (const hb_set_t *glyphs) const
79 {
80 if (glyphArray.len > glyphs->get_population () * hb_bit_storage ((unsigned) glyphArray.len) / 2)
81 {
82 for (hb_codepoint_t g = HB_SET_VALUE_INVALID; glyphs->next (&g);)
83 if (get_coverage (g) != NOT_COVERED)
84 return true;
85 return false;
86 }
87
88 for (const auto& g : glyphArray.as_array ())
89 if (glyphs->has (g))
90 return true;
91 return false;
92 }
93 bool intersects_coverage (const hb_set_t *glyphs, unsigned int index) const
94 { return glyphs->has (glyphArray[index]); }
95
96 template <typename IterableOut,
97 hb_requires (hb_is_sink_of (IterableOut, hb_codepoint_t))>
98 void intersect_set (const hb_set_t &glyphs, IterableOut&& intersect_glyphs) const
99 {
100 unsigned count = glyphArray.len;
101 for (unsigned i = 0; i < count; i++)
102 if (glyphs.has (glyphArray[i]))
103 intersect_glyphs << glyphArray[i];
104 }
105
106 template <typename set_t>
107 bool collect_coverage (set_t *glyphs) const
108 { return glyphs->add_sorted_array (glyphArray.as_array ()); }
109
110 public:
111 /* Older compilers need this to be public. */
112 struct iter_t
113 {
114 void init (const struct CoverageFormat1_3 &c_) { c = &c_; i = 0; }
115 bool __more__ () const { return i < c->glyphArray.len; }
116 void __next__ () { i++; }
117 hb_codepoint_t get_glyph () const { return c->glyphArray[i]; }
118 bool operator != (const iter_t& o) const
119 { return i != o.i; }
120 iter_t __end__ () const { iter_t it; it.init (*c); it.i = c->glyphArray.len; return it; }
121
122 private:
123 const struct CoverageFormat1_3 *c;
124 unsigned int i;
125 };
126 private:
127 };
128
129 }
130 }
131 }
132
133 #endif // #ifndef OT_LAYOUT_COMMON_COVERAGEFORMAT1_HH