101 lines
3.0 KiB
C++
101 lines
3.0 KiB
C++
#ifndef OT_LAYOUT_GPOS_SINGLEPOS_HH
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#define OT_LAYOUT_GPOS_SINGLEPOS_HH
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#include "SinglePosFormat1.hh"
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#include "SinglePosFormat2.hh"
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namespace OT {
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namespace Layout {
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namespace GPOS_impl {
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struct SinglePos
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{
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protected:
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union {
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HBUINT16 format; /* Format identifier */
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SinglePosFormat1 format1;
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SinglePosFormat2 format2;
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} u;
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public:
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template<typename Iterator,
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hb_requires (hb_is_iterator (Iterator))>
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unsigned get_format (Iterator glyph_val_iter_pairs)
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{
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hb_array_t<const Value> first_val_iter = hb_second (*glyph_val_iter_pairs);
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for (const auto iter : glyph_val_iter_pairs)
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for (const auto _ : hb_zip (iter.second, first_val_iter))
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if (_.first != _.second)
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return 2;
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return 1;
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}
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template<typename Iterator,
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typename SrcLookup,
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hb_requires (hb_is_iterator (Iterator))>
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void serialize (hb_serialize_context_t *c,
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const SrcLookup* src,
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Iterator glyph_val_iter_pairs,
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const hb_hashmap_t<unsigned, hb_pair_t<unsigned, int>> *layout_variation_idx_delta_map,
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bool all_axes_pinned)
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{
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if (unlikely (!c->extend_min (u.format))) return;
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unsigned format = 2;
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ValueFormat new_format = src->get_value_format ();
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if (all_axes_pinned)
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new_format = new_format.drop_device_table_flags ();
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if (glyph_val_iter_pairs)
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format = get_format (glyph_val_iter_pairs);
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u.format = format;
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switch (u.format) {
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case 1: u.format1.serialize (c,
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src,
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glyph_val_iter_pairs,
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new_format,
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layout_variation_idx_delta_map);
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return;
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case 2: u.format2.serialize (c,
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src,
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glyph_val_iter_pairs,
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new_format,
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layout_variation_idx_delta_map);
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return;
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default:return;
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}
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}
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template <typename context_t, typename ...Ts>
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typename context_t::return_t dispatch (context_t *c, Ts&&... ds) const
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{
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TRACE_DISPATCH (this, u.format);
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if (unlikely (!c->may_dispatch (this, &u.format))) return_trace (c->no_dispatch_return_value ());
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switch (u.format) {
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case 1: return_trace (c->dispatch (u.format1, std::forward<Ts> (ds)...));
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case 2: return_trace (c->dispatch (u.format2, std::forward<Ts> (ds)...));
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default:return_trace (c->default_return_value ());
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}
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}
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};
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template<typename Iterator, typename SrcLookup>
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static void
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SinglePos_serialize (hb_serialize_context_t *c,
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const SrcLookup *src,
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Iterator it,
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const hb_hashmap_t<unsigned, hb_pair_t<unsigned, int>> *layout_variation_idx_delta_map,
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bool all_axes_pinned)
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{ c->start_embed<SinglePos> ()->serialize (c, src, it, layout_variation_idx_delta_map, all_axes_pinned); }
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}
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}
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}
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#endif /* OT_LAYOUT_GPOS_SINGLEPOS_HH */
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