harfbuzz-sys 0.6.1

Rust bindings to the HarfBuzz text shaping engine
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133

/*
 * Copyright © 2007,2008,2009  Red Hat, Inc.
 * Copyright © 2010,2012  Google, Inc.
 *
 *  This is part of HarfBuzz, a text shaping library.
 *
 * Permission is hereby granted, without written agreement and without
 * license or royalty fees, to use, copy, modify, and distribute this
 * software and its documentation for any purpose, provided that the
 * above copyright notice and the following two paragraphs appear in
 * all copies of this software.
 *
 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 *
 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
 *
 * Red Hat Author(s): Behdad Esfahbod
 * Google Author(s): Behdad Esfahbod, Garret Rieger
 */


#ifndef OT_LAYOUT_COMMON_COVERAGEFORMAT1_HH
#define OT_LAYOUT_COMMON_COVERAGEFORMAT1_HH

namespace OT {
namespace Layout {
namespace Common {

#define NOT_COVERED             ((unsigned int) -1)

template <typename Types>
struct CoverageFormat1_3
{
  friend struct Coverage;

  protected:
  HBUINT16      coverageFormat; /* Format identifier--format = 1 */
  SortedArray16Of<typename Types::HBGlyphID>
                glyphArray;     /* Array of GlyphIDs--in numerical order */
  public:
  DEFINE_SIZE_ARRAY (4, glyphArray);

  private:
  bool sanitize (hb_sanitize_context_t *c) const
  {
    TRACE_SANITIZE (this);
    return_trace (glyphArray.sanitize (c));
  }

  unsigned int get_coverage (hb_codepoint_t glyph_id) const
  {
    unsigned int i;
    glyphArray.bfind (glyph_id, &i, HB_NOT_FOUND_STORE, NOT_COVERED);
    return i;
  }

  unsigned get_population () const
  {
    return glyphArray.len;
  }

  template <typename Iterator,
      hb_requires (hb_is_sorted_source_of (Iterator, hb_codepoint_t))>
  bool serialize (hb_serialize_context_t *c, Iterator glyphs)
  {
    TRACE_SERIALIZE (this);
    return_trace (glyphArray.serialize (c, glyphs));
  }

  bool intersects (const hb_set_t *glyphs) const
  {
    if (glyphArray.len > glyphs->get_population () * hb_bit_storage ((unsigned) glyphArray.len) / 2)
    {
      for (auto g : *glyphs)
        if (get_coverage (g) != NOT_COVERED)
	  return true;
      return false;
    }

    for (const auto& g : glyphArray.as_array ())
      if (glyphs->has (g))
        return true;
    return false;
  }
  bool intersects_coverage (const hb_set_t *glyphs, unsigned int index) const
  { return glyphs->has (glyphArray[index]); }

  template <typename IterableOut,
	    hb_requires (hb_is_sink_of (IterableOut, hb_codepoint_t))>
  void intersect_set (const hb_set_t &glyphs, IterableOut&& intersect_glyphs) const
  {
    unsigned count = glyphArray.len;
    for (unsigned i = 0; i < count; i++)
      if (glyphs.has (glyphArray[i]))
        intersect_glyphs << glyphArray[i];
  }

  template <typename set_t>
  bool collect_coverage (set_t *glyphs) const
  { return glyphs->add_sorted_array (glyphArray.as_array ()); }

  public:
  /* Older compilers need this to be public. */
  struct iter_t
  {
    void init (const struct CoverageFormat1_3 &c_) { c = &c_; i = 0; }
    bool __more__ () const { return i < c->glyphArray.len; }
    void __next__ () { i++; }
    hb_codepoint_t get_glyph () const { return c->glyphArray[i]; }
    bool operator != (const iter_t& o) const
    { return i != o.i; }
    iter_t __end__ () const { iter_t it; it.init (*c); it.i = c->glyphArray.len; return it; }

    private:
    const struct CoverageFormat1_3 *c;
    unsigned int i;
  };
  private:
};

}
}
}

#endif  // #ifndef OT_LAYOUT_COMMON_COVERAGEFORMAT1_HH