63 lines
1.5 KiB
C++
63 lines
1.5 KiB
C++
#ifndef OT_LAYOUT_GSUB_MULTIPLESUBST_HH
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#define OT_LAYOUT_GSUB_MULTIPLESUBST_HH
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#include "Common.hh"
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#include "MultipleSubstFormat1.hh"
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namespace OT {
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namespace Layout {
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namespace GSUB_impl {
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struct MultipleSubst
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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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MultipleSubstFormat1_2<SmallTypes> format1;
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#ifndef HB_NO_BEYOND_64K
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MultipleSubstFormat1_2<MediumTypes> format2;
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#endif
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} u;
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public:
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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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if (unlikely (!c->may_dispatch (this, &u.format))) return c->no_dispatch_return_value ();
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TRACE_DISPATCH (this, u.format);
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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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#ifndef HB_NO_BEYOND_64K
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case 2: return_trace (c->dispatch (u.format2, std::forward<Ts> (ds)...));
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#endif
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default:return_trace (c->default_return_value ());
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}
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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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if (unlikely (!c->extend_min (u.format))) return_trace (false);
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unsigned int format = 1;
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u.format = format;
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switch (u.format) {
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case 1: return_trace (u.format1.serialize (c, it));
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default:return_trace (false);
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}
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}
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/* TODO subset() should choose format. */
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};
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}
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}
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}
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#endif /* OT_LAYOUT_GSUB_MULTIPLESUBST_HH */
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