1 | #ifndef OT_LAYOUT_GPOS_MARKARRAY_HH |
2 | #define OT_LAYOUT_GPOS_MARKARRAY_HH |
3 | |
4 | #include "AnchorMatrix.hh" |
5 | #include "MarkRecord.hh" |
6 | |
7 | namespace OT { |
8 | namespace Layout { |
9 | namespace GPOS_impl { |
10 | |
11 | struct MarkArray : Array16Of<MarkRecord> /* Array of MarkRecords--in Coverage order */ |
12 | { |
13 | bool sanitize (hb_sanitize_context_t *c) const |
14 | { |
15 | TRACE_SANITIZE (this); |
16 | return_trace (Array16Of<MarkRecord>::sanitize (c, this)); |
17 | } |
18 | |
19 | bool apply (hb_ot_apply_context_t *c, |
20 | unsigned int mark_index, unsigned int glyph_index, |
21 | const AnchorMatrix &anchors, unsigned int class_count, |
22 | unsigned int glyph_pos) const |
23 | { |
24 | TRACE_APPLY (this); |
25 | hb_buffer_t *buffer = c->buffer; |
26 | const MarkRecord &record = Array16Of<MarkRecord>::operator[](mark_index); |
27 | unsigned int mark_class = record.klass; |
28 | |
29 | const Anchor& mark_anchor = this + record.markAnchor; |
30 | bool found; |
31 | const Anchor& glyph_anchor = anchors.get_anchor (c, glyph_index, mark_class, class_count, &found); |
32 | /* If this subtable doesn't have an anchor for this base and this class, |
33 | * return false such that the subsequent subtables have a chance at it. */ |
34 | if (unlikely (!found)) return_trace (false); |
35 | |
36 | float mark_x, mark_y, base_x, base_y; |
37 | |
38 | buffer->unsafe_to_break (glyph_pos, buffer->idx + 1); |
39 | mark_anchor.get_anchor (c, buffer->cur().codepoint, &mark_x, &mark_y); |
40 | glyph_anchor.get_anchor (c, buffer->info[glyph_pos].codepoint, &base_x, &base_y); |
41 | |
42 | if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) |
43 | { |
44 | c->buffer->message (c->font, |
45 | "attaching mark glyph at %u to glyph at %u" , |
46 | c->buffer->idx, glyph_pos); |
47 | } |
48 | |
49 | hb_glyph_position_t &o = buffer->cur_pos(); |
50 | o.x_offset = roundf (base_x - mark_x); |
51 | o.y_offset = roundf (base_y - mark_y); |
52 | o.attach_type() = ATTACH_TYPE_MARK; |
53 | o.attach_chain() = (int) glyph_pos - (int) buffer->idx; |
54 | buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_GPOS_ATTACHMENT; |
55 | |
56 | if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) |
57 | { |
58 | c->buffer->message (c->font, |
59 | "attached mark glyph at %u to glyph at %u" , |
60 | c->buffer->idx, glyph_pos); |
61 | } |
62 | |
63 | buffer->idx++; |
64 | return_trace (true); |
65 | } |
66 | |
67 | template <typename Iterator, |
68 | hb_requires (hb_is_iterator (Iterator))> |
69 | bool subset (hb_subset_context_t *c, |
70 | Iterator coverage, |
71 | const hb_map_t *klass_mapping) const |
72 | { |
73 | TRACE_SUBSET (this); |
74 | const hb_set_t &glyphset = *c->plan->glyphset_gsub (); |
75 | |
76 | auto* out = c->serializer->start_embed (this); |
77 | if (unlikely (!c->serializer->extend_min (out))) return_trace (false); |
78 | |
79 | auto mark_iter = |
80 | + hb_zip (coverage, this->iter ()) |
81 | | hb_filter (glyphset, hb_first) |
82 | | hb_map (hb_second) |
83 | ; |
84 | |
85 | unsigned new_length = 0; |
86 | for (const auto& mark_record : mark_iter) { |
87 | if (unlikely (!mark_record.subset (c, this, klass_mapping))) |
88 | return_trace (false); |
89 | new_length++; |
90 | } |
91 | |
92 | if (unlikely (!c->serializer->check_assign (out->len, new_length, |
93 | HB_SERIALIZE_ERROR_ARRAY_OVERFLOW))) |
94 | return_trace (false); |
95 | |
96 | return_trace (true); |
97 | } |
98 | }; |
99 | |
100 | HB_INTERNAL inline |
101 | void Markclass_closure_and_remap_indexes (const Coverage &mark_coverage, |
102 | const MarkArray &mark_array, |
103 | const hb_set_t &glyphset, |
104 | hb_map_t* klass_mapping /* INOUT */) |
105 | { |
106 | hb_set_t orig_classes; |
107 | |
108 | + hb_zip (mark_coverage, mark_array) |
109 | | hb_filter (glyphset, hb_first) |
110 | | hb_map (hb_second) |
111 | | hb_map (&MarkRecord::get_class) |
112 | | hb_sink (orig_classes) |
113 | ; |
114 | |
115 | unsigned idx = 0; |
116 | for (auto klass : orig_classes.iter ()) |
117 | { |
118 | if (klass_mapping->has (klass)) continue; |
119 | klass_mapping->set (klass, idx); |
120 | idx++; |
121 | } |
122 | } |
123 | |
124 | } |
125 | } |
126 | } |
127 | |
128 | #endif /* OT_LAYOUT_GPOS_MARKARRAY_HH */ |
129 | |