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comparison mupdf-source/thirdparty/harfbuzz/src/OT/Layout/GSUB/AlternateSubst.hh @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1:1d09e1dec1d9 2:b50eed0cc0ef
1 #ifndef OT_LAYOUT_GSUB_ALTERNATESUBST_HH
2 #define OT_LAYOUT_GSUB_ALTERNATESUBST_HH
3
4 #include "AlternateSubstFormat1.hh"
5 #include "Common.hh"
6
7 namespace OT {
8 namespace Layout {
9 namespace GSUB_impl {
10
11 struct AlternateSubst
12 {
13 protected:
14 union {
15 HBUINT16 format; /* Format identifier */
16 AlternateSubstFormat1_2<SmallTypes> format1;
17 #ifndef HB_NO_BEYOND_64K
18 AlternateSubstFormat1_2<MediumTypes> format2;
19 #endif
20 } u;
21 public:
22
23 template <typename context_t, typename ...Ts>
24 typename context_t::return_t dispatch (context_t *c, Ts&&... ds) const
25 {
26 TRACE_DISPATCH (this, u.format);
27 if (unlikely (!c->may_dispatch (this, &u.format))) return_trace (c->no_dispatch_return_value ());
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 unused and not updated to 24bit GIDs. Should be done by using
38 * iterators. While at it perhaps using iterator of arrays of hb_codepoint_t instead. */
39 bool serialize (hb_serialize_context_t *c,
40 hb_sorted_array_t<const HBGlyphID16> glyphs,
41 hb_array_t<const unsigned int> alternate_len_list,
42 hb_array_t<const HBGlyphID16> alternate_glyphs_list)
43 {
44 TRACE_SERIALIZE (this);
45 if (unlikely (!c->extend_min (u.format))) return_trace (false);
46 unsigned int format = 1;
47 u.format = format;
48 switch (u.format) {
49 case 1: return_trace (u.format1.serialize (c, glyphs, alternate_len_list, alternate_glyphs_list));
50 default:return_trace (false);
51 }
52 }
53
54 /* TODO subset() should choose format. */
55
56 };
57
58 }
59 }
60 }
61
62 #endif /* OT_LAYOUT_GSUB_ALTERNATESUBST_HH */