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26 #ifndef HB_OT_POST_TABLE_V2SUBSET_HH
27 #define HB_OT_POST_TABLE_V2SUBSET_HH
29 #include "hb-open-type.hh"
30 #include "hb-ot-post-table.hh"
34 * https://docs.microsoft.com/en-us/typography/opentype/spec/post
38 template<typename Iterator>
39 HB_INTERNAL bool postV2Tail::serialize (hb_serialize_context_t *c,
41 const void* _post) const
43 TRACE_SERIALIZE (this);
44 auto *out = c->start_embed (this);
45 if (unlikely (!c->check_success (out))) return_trace (false);
46 if (!out->glyphNameIndex.serialize (c, + it
47 | hb_map (hb_second)))
50 hb_set_t copied_indices;
51 for (const auto& _ : + it )
53 unsigned glyph_id = _.first;
54 unsigned new_index = _.second;
56 if (new_index < 258) continue;
57 if (copied_indices.has (new_index)) continue;
58 copied_indices.add (new_index);
60 hb_bytes_t s = reinterpret_cast<const post::accelerator_t*> (_post)->find_glyph_name (glyph_id);
61 HBUINT8 *o = c->allocate_size<HBUINT8> (HBUINT8::static_size * (s.length + 1));
62 if (unlikely (!o)) return_trace (false);
63 if (!c->check_assign (o[0], s.length, HB_SERIALIZE_ERROR_INT_OVERFLOW)) return_trace (false);
64 memcpy (o+1, s.arrayZ, HBUINT8::static_size * s.length);
70 HB_INTERNAL bool postV2Tail::subset (hb_subset_context_t *c) const
74 const hb_map_t &reverse_glyph_map = *c->plan->reverse_glyph_map;
75 unsigned num_glyphs = c->plan->num_output_glyphs ();
76 hb_map_t old_new_index_map, old_gid_new_index_map;
79 post::accelerator_t _post (c->plan->source);
81 hb_hashmap_t<hb_bytes_t, unsigned, std::nullptr_t, unsigned, nullptr, (unsigned)-1> glyph_name_to_new_index;
82 for (hb_codepoint_t new_gid = 0; new_gid < num_glyphs; new_gid++)
84 hb_codepoint_t old_gid = reverse_glyph_map.get (new_gid);
85 unsigned old_index = glyphNameIndex[old_gid];
88 if (old_index <= 257) new_index = old_index;
89 else if (old_new_index_map.has (old_index)) new_index = old_new_index_map.get (old_index);
92 hb_bytes_t s = _post.find_glyph_name (old_gid);
93 new_index = glyph_name_to_new_index.get (s);
94 if (new_index == (unsigned)-1)
96 int standard_glyph_index = -1;
97 for (unsigned i = 0; i < format1_names_length; i++)
99 if (s == format1_names (i))
101 standard_glyph_index = i;
106 if (standard_glyph_index == -1)
112 { new_index = standard_glyph_index; }
113 glyph_name_to_new_index.set (s, new_index);
115 old_new_index_map.set (old_index, new_index);
117 old_gid_new_index_map.set (old_gid, new_index);
121 + hb_range (num_glyphs)
122 | hb_map (reverse_glyph_map)
123 | hb_map_retains_sorting ([&](hb_codepoint_t old_gid)
125 unsigned new_index = old_gid_new_index_map.get (old_gid);
126 return hb_pair_t<unsigned, unsigned> (old_gid, new_index);
130 return_trace (serialize (c->serializer, index_iter, &_post));
134 #endif /* HB_OT_POST_TABLE_V2SUBSET_HH */