57 lines
1.7 KiB
C++
57 lines
1.7 KiB
C++
#ifndef OT_LAYOUT_GPOS_LIGATUREARRAY_HH
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#define OT_LAYOUT_GPOS_LIGATUREARRAY_HH
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namespace OT {
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namespace Layout {
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namespace GPOS_impl {
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typedef AnchorMatrix LigatureAttach; /* component-major--
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* in order of writing direction--,
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* mark-minor--
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* ordered by class--zero-based. */
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/* Array of LigatureAttach tables ordered by LigatureCoverage Index */
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struct LigatureArray : List16OfOffset16To<LigatureAttach>
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{
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template <typename Iterator,
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hb_requires (hb_is_iterator (Iterator))>
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bool subset (hb_subset_context_t *c,
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Iterator coverage,
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unsigned class_count,
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const hb_map_t *klass_mapping) const
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{
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TRACE_SUBSET (this);
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const hb_set_t &glyphset = *c->plan->glyphset_gsub ();
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auto *out = c->serializer->start_embed (this);
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if (unlikely (!c->serializer->extend_min (out))) return_trace (false);
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for (const auto _ : + hb_zip (coverage, *this)
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| hb_filter (glyphset, hb_first))
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{
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auto *matrix = out->serialize_append (c->serializer);
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if (unlikely (!matrix)) return_trace (false);
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const LigatureAttach& src = (this + _.second);
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auto indexes =
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+ hb_range (src.rows * class_count)
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| hb_filter ([=] (unsigned index) { return klass_mapping->has (index % class_count); })
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;
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matrix->serialize_subset (c,
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_.second,
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this,
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src.rows,
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indexes);
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}
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return_trace (this->len);
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}
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};
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}
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}
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}
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#endif /* OT_LAYOUT_GPOS_LIGATUREARRAY_HH */
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