72 lines
2.3 KiB
C++
72 lines
2.3 KiB
C++
#ifndef OT_LAYOUT_GSUB_LIGATURESUBST_HH
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#define OT_LAYOUT_GSUB_LIGATURESUBST_HH
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#include "Common.hh"
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#include "LigatureSubstFormat1.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 LigatureSubst
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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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LigatureSubstFormat1_2<SmallTypes> format1;
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#ifndef HB_NO_BEYOND_64K
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LigatureSubstFormat1_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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/* TODO This function is only used by small GIDs, and not updated to 24bit GIDs. Should
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* be done by using iterators. While at it perhaps using iterator of arrays of hb_codepoint_t
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* instead. */
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bool serialize (hb_serialize_context_t *c,
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hb_sorted_array_t<const HBGlyphID16> first_glyphs,
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hb_array_t<const unsigned int> ligature_per_first_glyph_count_list,
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hb_array_t<const HBGlyphID16> ligatures_list,
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hb_array_t<const unsigned int> component_count_list,
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hb_array_t<const HBGlyphID16> component_list /* Starting from second for each ligature */)
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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,
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first_glyphs,
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ligature_per_first_glyph_count_list,
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ligatures_list,
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component_count_list,
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component_list));
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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_LIGATURESUBST_HH */
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