78 lines
2.4 KiB
C++
78 lines
2.4 KiB
C++
#ifndef OT_LAYOUT_GSUB_SUBSTLOOKUPSUBTABLE_HH
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#define OT_LAYOUT_GSUB_SUBSTLOOKUPSUBTABLE_HH
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#include "Common.hh"
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#include "SingleSubst.hh"
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#include "MultipleSubst.hh"
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#include "AlternateSubst.hh"
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#include "LigatureSubst.hh"
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#include "ContextSubst.hh"
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#include "ChainContextSubst.hh"
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#include "ExtensionSubst.hh"
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#include "ReverseChainSingleSubst.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 SubstLookupSubTable
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{
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friend struct ::OT::Lookup;
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friend struct SubstLookup;
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protected:
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union {
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SingleSubst single;
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MultipleSubst multiple;
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AlternateSubst alternate;
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LigatureSubst ligature;
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ContextSubst context;
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ChainContextSubst chainContext;
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ExtensionSubst extension;
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ReverseChainSingleSubst reverseChainContextSingle;
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} u;
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public:
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DEFINE_SIZE_MIN (0);
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enum Type {
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Single = 1,
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Multiple = 2,
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Alternate = 3,
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Ligature = 4,
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Context = 5,
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ChainContext = 6,
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Extension = 7,
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ReverseChainSingle = 8
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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, unsigned int lookup_type, Ts&&... ds) const
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{
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TRACE_DISPATCH (this, lookup_type);
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switch (lookup_type) {
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case Single: return_trace (u.single.dispatch (c, std::forward<Ts> (ds)...));
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case Multiple: return_trace (u.multiple.dispatch (c, std::forward<Ts> (ds)...));
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case Alternate: return_trace (u.alternate.dispatch (c, std::forward<Ts> (ds)...));
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case Ligature: return_trace (u.ligature.dispatch (c, std::forward<Ts> (ds)...));
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case Context: return_trace (u.context.dispatch (c, std::forward<Ts> (ds)...));
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case ChainContext: return_trace (u.chainContext.dispatch (c, std::forward<Ts> (ds)...));
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case Extension: return_trace (u.extension.dispatch (c, std::forward<Ts> (ds)...));
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case ReverseChainSingle: return_trace (u.reverseChainContextSingle.dispatch (c, 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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bool intersects (const hb_set_t *glyphs, unsigned int lookup_type) const
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{
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hb_intersects_context_t c (glyphs);
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return dispatch (&c, lookup_type);
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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 /* HB_OT_LAYOUT_GSUB_SUBSTLOOKUPSUBTABLE_HH */
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