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comparison mupdf-source/thirdparty/harfbuzz/src/OT/Layout/GPOS/SinglePosFormat2.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 #ifndef OT_LAYOUT_GPOS_SINGLEPOSFORMAT2_HH
2 #define OT_LAYOUT_GPOS_SINGLEPOSFORMAT2_HH
3
4 #include "Common.hh"
5
6 namespace OT {
7 namespace Layout {
8 namespace GPOS_impl {
9
10 struct SinglePosFormat2
11 {
12 protected:
13 HBUINT16 format; /* Format identifier--format = 2 */
14 Offset16To<Coverage>
15 coverage; /* Offset to Coverage table--from
16 * beginning of subtable */
17 ValueFormat valueFormat; /* Defines the types of data in the
18 * ValueRecord */
19 HBUINT16 valueCount; /* Number of ValueRecords */
20 ValueRecord values; /* Array of ValueRecords--positioning
21 * values applied to glyphs */
22 public:
23 DEFINE_SIZE_ARRAY (8, values);
24
25 bool sanitize (hb_sanitize_context_t *c) const
26 {
27 TRACE_SANITIZE (this);
28 return_trace (c->check_struct (this) &&
29 coverage.sanitize (c, this) &&
30 valueFormat.sanitize_values (c, this, values, valueCount));
31 }
32
33 bool intersects (const hb_set_t *glyphs) const
34 { return (this+coverage).intersects (glyphs); }
35
36 void closure_lookups (hb_closure_lookups_context_t *c) const {}
37 void collect_variation_indices (hb_collect_variation_indices_context_t *c) const
38 {
39 if (!valueFormat.has_device ()) return;
40
41 auto it =
42 + hb_zip (this+coverage, hb_range ((unsigned) valueCount))
43 | hb_filter (c->glyph_set, hb_first)
44 ;
45
46 if (!it) return;
47
48 unsigned sub_length = valueFormat.get_len ();
49 const hb_array_t<const Value> values_array = values.as_array (valueCount * sub_length);
50
51 for (unsigned i : + it
52 | hb_map (hb_second))
53 valueFormat.collect_variation_indices (c, this, values_array.sub_array (i * sub_length, sub_length));
54
55 }
56
57 void collect_glyphs (hb_collect_glyphs_context_t *c) const
58 { if (unlikely (!(this+coverage).collect_coverage (c->input))) return; }
59
60 const Coverage &get_coverage () const { return this+coverage; }
61
62 ValueFormat get_value_format () const { return valueFormat; }
63
64 bool apply (hb_ot_apply_context_t *c) const
65 {
66 TRACE_APPLY (this);
67 hb_buffer_t *buffer = c->buffer;
68 unsigned int index = (this+coverage).get_coverage (buffer->cur().codepoint);
69 if (likely (index == NOT_COVERED)) return_trace (false);
70
71 if (unlikely (index >= valueCount)) return_trace (false);
72
73 if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ())
74 {
75 c->buffer->message (c->font,
76 "positioning glyph at %d",
77 c->buffer->idx);
78 }
79
80 valueFormat.apply_value (c, this,
81 &values[index * valueFormat.get_len ()],
82 buffer->cur_pos());
83
84 if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ())
85 {
86 c->buffer->message (c->font,
87 "positioned glyph at %d",
88 c->buffer->idx);
89 }
90
91 buffer->idx++;
92 return_trace (true);
93 }
94
95 bool
96 position_single (hb_font_t *font,
97 hb_direction_t direction,
98 hb_codepoint_t gid,
99 hb_glyph_position_t &pos) const
100 {
101 unsigned int index = (this+coverage).get_coverage (gid);
102 if (likely (index == NOT_COVERED)) return false;
103 if (unlikely (index >= valueCount)) return false;
104
105 /* This is ugly... */
106 hb_buffer_t buffer;
107 buffer.props.direction = direction;
108 OT::hb_ot_apply_context_t c (1, font, &buffer);
109
110 valueFormat.apply_value (&c, this,
111 &values[index * valueFormat.get_len ()],
112 pos);
113 return true;
114 }
115
116
117 template<typename Iterator,
118 typename SrcLookup,
119 hb_requires (hb_is_iterator (Iterator))>
120 void serialize (hb_serialize_context_t *c,
121 const SrcLookup *src,
122 Iterator it,
123 ValueFormat newFormat,
124 const hb_hashmap_t<unsigned, hb_pair_t<unsigned, int>> *layout_variation_idx_delta_map)
125 {
126 auto out = c->extend_min (this);
127 if (unlikely (!out)) return;
128 if (unlikely (!c->check_assign (valueFormat, newFormat, HB_SERIALIZE_ERROR_INT_OVERFLOW))) return;
129 if (unlikely (!c->check_assign (valueCount, it.len (), HB_SERIALIZE_ERROR_ARRAY_OVERFLOW))) return;
130
131 + it
132 | hb_map (hb_second)
133 | hb_apply ([&] (hb_array_t<const Value> _)
134 { src->get_value_format ().copy_values (c, newFormat, src, &_, layout_variation_idx_delta_map); })
135 ;
136
137 auto glyphs =
138 + it
139 | hb_map_retains_sorting (hb_first)
140 ;
141
142 coverage.serialize_serialize (c, glyphs);
143 }
144
145 bool subset (hb_subset_context_t *c) const
146 {
147 TRACE_SUBSET (this);
148 const hb_set_t &glyphset = *c->plan->glyphset_gsub ();
149 const hb_map_t &glyph_map = *c->plan->glyph_map;
150
151 unsigned sub_length = valueFormat.get_len ();
152 auto values_array = values.as_array (valueCount * sub_length);
153
154 auto it =
155 + hb_zip (this+coverage, hb_range ((unsigned) valueCount))
156 | hb_filter (glyphset, hb_first)
157 | hb_map_retains_sorting ([&] (const hb_pair_t<hb_codepoint_t, unsigned>& _)
158 {
159 return hb_pair (glyph_map[_.first],
160 values_array.sub_array (_.second * sub_length,
161 sub_length));
162 })
163 ;
164
165 bool ret = bool (it);
166 SinglePos_serialize (c->serializer, this, it, c->plan->layout_variation_idx_delta_map, c->plan->all_axes_pinned);
167 return_trace (ret);
168 }
169 };
170
171
172 }
173 }
174 }
175
176 #endif /* OT_LAYOUT_GPOS_SINGLEPOSFORMAT2_HH */