1#ifndef OT_LAYOUT_GSUB_LIGATURESUBST_HH
2#define OT_LAYOUT_GSUB_LIGATURESUBST_HH
3
4#include "Common.hh"
5#include "LigatureSubstFormat1.hh"
6
7namespace OT {
8namespace Layout {
9namespace GSUB_impl {
10
11struct LigatureSubst
12{
13 protected:
14 union {
15 HBUINT16 format; /* Format identifier */
16 LigatureSubstFormat1_2<SmallTypes> format1;
17#ifndef HB_NO_BEYOND_64K
18 LigatureSubstFormat1_2<MediumTypes> format2;
19#endif
20 } u;
21
22 public:
23 template <typename context_t, typename ...Ts>
24 typename context_t::return_t dispatch (context_t *c, Ts&&... ds) const
25 {
26 if (unlikely (!c->may_dispatch (this, &u.format))) return c->no_dispatch_return_value ();
27 TRACE_DISPATCH (this, u.format);
28 switch (u.format) {
29 case 1: return_trace (c->dispatch (u.format1, std::forward<Ts> (ds)...));
30#ifndef HB_NO_BEYOND_64K
31 case 2: return_trace (c->dispatch (u.format2, std::forward<Ts> (ds)...));
32#endif
33 default:return_trace (c->default_return_value ());
34 }
35 }
36
37 /* TODO This function is only used by small GIDs, and not updated to 24bit GIDs. Should
38 * be done by using iterators. While at it perhaps using iterator of arrays of hb_codepoint_t
39 * instead. */
40 bool serialize (hb_serialize_context_t *c,
41 hb_sorted_array_t<const HBGlyphID16> first_glyphs,
42 hb_array_t<const unsigned int> ligature_per_first_glyph_count_list,
43 hb_array_t<const HBGlyphID16> ligatures_list,
44 hb_array_t<const unsigned int> component_count_list,
45 hb_array_t<const HBGlyphID16> component_list /* Starting from second for each ligature */)
46 {
47 TRACE_SERIALIZE (this);
48 if (unlikely (!c->extend_min (u.format))) return_trace (false);
49 unsigned int format = 1;
50 u.format = format;
51 switch (u.format) {
52 case 1: return_trace (u.format1.serialize (c,
53 first_glyphs,
54 ligature_per_first_glyph_count_list,
55 ligatures_list,
56 component_count_list,
57 component_list));
58 default:return_trace (false);
59 }
60 }
61
62 /* TODO subset() should choose format. */
63
64};
65
66
67}
68}
69}
70
71#endif /* OT_LAYOUT_GSUB_LIGATURESUBST_HH */
72