PosLookup.hh (2024B)
1 #ifndef OT_LAYOUT_GPOS_POSLOOKUP_HH 2 #define OT_LAYOUT_GPOS_POSLOOKUP_HH 3 4 #include "PosLookupSubTable.hh" 5 #include "../../../hb-ot-layout-common.hh" 6 7 namespace OT { 8 namespace Layout { 9 namespace GPOS_impl { 10 11 struct PosLookup : Lookup 12 { 13 using SubTable = PosLookupSubTable; 14 15 const SubTable& get_subtable (unsigned int i) const 16 { return Lookup::get_subtable<SubTable> (i); } 17 18 bool is_reverse () const 19 { 20 return false; 21 } 22 23 bool apply (hb_ot_apply_context_t *c) const 24 { 25 TRACE_APPLY (this); 26 return_trace (dispatch (c)); 27 } 28 29 bool intersects (const hb_set_t *glyphs) const 30 { 31 hb_intersects_context_t c (glyphs); 32 return dispatch (&c); 33 } 34 35 hb_collect_glyphs_context_t::return_t collect_glyphs (hb_collect_glyphs_context_t *c) const 36 { return dispatch (c); } 37 38 hb_closure_lookups_context_t::return_t closure_lookups (hb_closure_lookups_context_t *c, unsigned this_index) const 39 { 40 if (c->is_lookup_visited (this_index)) 41 return hb_closure_lookups_context_t::default_return_value (); 42 43 c->set_lookup_visited (this_index); 44 if (!intersects (c->glyphs)) 45 { 46 c->set_lookup_inactive (this_index); 47 return hb_closure_lookups_context_t::default_return_value (); 48 } 49 50 hb_closure_lookups_context_t::return_t ret = dispatch (c); 51 return ret; 52 } 53 54 template <typename set_t> 55 void collect_coverage (set_t *glyphs) const 56 { 57 hb_collect_coverage_context_t<set_t> c (glyphs); 58 dispatch (&c); 59 } 60 61 template <typename context_t> 62 static typename context_t::return_t dispatch_recurse_func (context_t *c, unsigned int lookup_index); 63 64 template <typename context_t, typename ...Ts> 65 typename context_t::return_t dispatch (context_t *c, Ts&&... ds) const 66 { return Lookup::dispatch<SubTable> (c, std::forward<Ts> (ds)...); } 67 68 bool subset (hb_subset_context_t *c) const 69 { return Lookup::subset<SubTable> (c); } 70 71 bool sanitize (hb_sanitize_context_t *c) const 72 { return Lookup::sanitize<SubTable> (c); } 73 }; 74 75 } 76 } 77 } 78 79 #endif /* OT_LAYOUT_GPOS_POSLOOKUP_HH */