1 #ifndef OT_LAYOUT_GPOS_LIGATUREARRAY_HH 2 #define OT_LAYOUT_GPOS_LIGATUREARRAY_HH 3 4 namespace OT { 5 namespace Layout { 6 namespace GPOS_impl { 7 8 9 typedef AnchorMatrix LigatureAttach; /* component-major-- 10 * in order of writing direction--, 11 * mark-minor-- 12 * ordered by class--zero-based. */ 13 14 /* Array of LigatureAttach tables ordered by LigatureCoverage Index */ 15 struct LigatureArray : List16OfOffset16To<LigatureAttach> 16 { 17 template <typename Iterator, 18 hb_requires (hb_is_iterator (Iterator))> subsetOT::Layout::GPOS_impl::LigatureArray19 bool subset (hb_subset_context_t *c, 20 Iterator coverage, 21 unsigned class_count, 22 const hb_map_t *klass_mapping) const 23 { 24 TRACE_SUBSET (this); 25 const hb_set_t &glyphset = *c->plan->glyphset_gsub (); 26 27 auto *out = c->serializer->start_embed (this); 28 if (unlikely (!c->serializer->extend_min (out))) return_trace (false); 29 30 bool ret = false; 31 for (const auto _ : + hb_zip (coverage, *this) 32 | hb_filter (glyphset, hb_first)) 33 { 34 auto *matrix = out->serialize_append (c->serializer); 35 if (unlikely (!matrix)) return_trace (false); 36 37 const LigatureAttach& src = (this + _.second); 38 auto indexes = 39 + hb_range (src.rows * class_count) 40 | hb_filter ([=] (unsigned index) { return klass_mapping->has (index % class_count); }) 41 ; 42 ret |= matrix->serialize_subset (c, 43 _.second, 44 this, 45 src.rows, 46 indexes); 47 } 48 return_trace (ret); 49 } 50 }; 51 52 53 } 54 } 55 } 56 57 #endif /* OT_LAYOUT_GPOS_LIGATUREARRAY_HH */ 58