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131 lines
3.7 KiB
C++
131 lines
3.7 KiB
C++
#ifndef OT_LAYOUT_GSUB_MULTIPLESUBSTFORMAT1_HH
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#define OT_LAYOUT_GSUB_MULTIPLESUBSTFORMAT1_HH
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#include "Common.hh"
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#include "Sequence.hh"
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namespace OT {
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namespace Layout {
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namespace GSUB_impl {
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template <typename Types>
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struct MultipleSubstFormat1_2
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{
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protected:
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HBUINT16 format; /* Format identifier--format = 1 */
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typename Types::template OffsetTo<Coverage>
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coverage; /* Offset to Coverage table--from
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* beginning of Substitution table */
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Array16Of<typename Types::template OffsetTo<Sequence<Types>>>
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sequence; /* Array of Sequence tables
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* ordered by Coverage Index */
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public:
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DEFINE_SIZE_ARRAY (4 + Types::size, sequence);
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bool sanitize (hb_sanitize_context_t *c) const
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{
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TRACE_SANITIZE (this);
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return_trace (coverage.sanitize (c, this) && sequence.sanitize (c, this));
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}
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bool intersects (const hb_set_t *glyphs) const
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{ return (this+coverage).intersects (glyphs); }
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bool may_have_non_1to1 () const
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{ return true; }
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void closure (hb_closure_context_t *c) const
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{
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+ hb_zip (this+coverage, sequence)
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| hb_filter (c->parent_active_glyphs (), hb_first)
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| hb_map (hb_second)
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| hb_map (hb_add (this))
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| hb_apply ([c] (const Sequence<Types> &_) { _.closure (c); })
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;
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}
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void closure_lookups (hb_closure_lookups_context_t *c) const {}
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void collect_glyphs (hb_collect_glyphs_context_t *c) const
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{
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if (unlikely (!(this+coverage).collect_coverage (c->input))) return;
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+ hb_zip (this+coverage, sequence)
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| hb_map (hb_second)
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| hb_map (hb_add (this))
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| hb_apply ([c] (const Sequence<Types> &_) { _.collect_glyphs (c); })
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;
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}
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const Coverage &get_coverage () const { return this+coverage; }
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bool would_apply (hb_would_apply_context_t *c) const
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{ return c->len == 1 && (this+coverage).get_coverage (c->glyphs[0]) != NOT_COVERED; }
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bool apply (hb_ot_apply_context_t *c) const
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{
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TRACE_APPLY (this);
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unsigned int index = (this+coverage).get_coverage (c->buffer->cur().codepoint);
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if (index == NOT_COVERED) return_trace (false);
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return_trace ((this+sequence[index]).apply (c));
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}
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template<typename Iterator,
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hb_requires (hb_is_sorted_iterator (Iterator))>
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bool serialize (hb_serialize_context_t *c,
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Iterator it)
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{
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TRACE_SERIALIZE (this);
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auto sequences =
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+ it
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| hb_map (hb_second)
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;
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auto glyphs =
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+ it
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| hb_map_retains_sorting (hb_first)
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;
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if (unlikely (!c->extend_min (this))) return_trace (false);
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if (unlikely (!sequence.serialize (c, sequences.length))) return_trace (false);
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for (auto& pair : hb_zip (sequences, sequence))
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{
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if (unlikely (!pair.second
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.serialize_serialize (c, pair.first)))
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return_trace (false);
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}
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return_trace (coverage.serialize_serialize (c, glyphs));
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}
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bool subset (hb_subset_context_t *c) 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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const hb_map_t &glyph_map = *c->plan->glyph_map;
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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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out->format = format;
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hb_sorted_vector_t<hb_codepoint_t> new_coverage;
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+ hb_zip (this+coverage, sequence)
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| hb_filter (glyphset, hb_first)
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| hb_filter (subset_offset_array (c, out->sequence, this), hb_second)
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| hb_map (hb_first)
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| hb_map (glyph_map)
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| hb_sink (new_coverage)
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;
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out->coverage.serialize_serialize (c->serializer, new_coverage.iter ());
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return_trace (bool (new_coverage));
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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_GSUB_MULTIPLESUBSTFORMAT1_HH */
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