/src/harfbuzz/src/OT/Layout/GPOS/Anchor.hh
Line | Count | Source |
1 | | #ifndef OT_LAYOUT_GPOS_ANCHOR_HH |
2 | | #define OT_LAYOUT_GPOS_ANCHOR_HH |
3 | | |
4 | | #include "AnchorFormat1.hh" |
5 | | #include "AnchorFormat2.hh" |
6 | | #include "AnchorFormat3.hh" |
7 | | |
8 | | namespace OT { |
9 | | namespace Layout { |
10 | | namespace GPOS_impl { |
11 | | |
12 | | struct Anchor |
13 | | { |
14 | | protected: |
15 | | union { |
16 | | HBUINT16 format; /* Format identifier */ |
17 | | AnchorFormat1 format1; |
18 | | AnchorFormat2 format2; |
19 | | AnchorFormat3 format3; |
20 | | } u; |
21 | | public: |
22 | | DEFINE_SIZE_UNION (2, format); |
23 | | |
24 | | bool sanitize (hb_sanitize_context_t *c) const |
25 | 3.13k | { |
26 | 3.13k | TRACE_SANITIZE (this); |
27 | 3.13k | if (!u.format.sanitize (c)) return_trace (false); |
28 | 3.13k | hb_barrier (); |
29 | 3.13k | switch (u.format) { |
30 | 3.10k | case 1: return_trace (u.format1.sanitize (c)); |
31 | 31 | case 2: return_trace (u.format2.sanitize (c)); |
32 | 0 | case 3: return_trace (u.format3.sanitize (c)); |
33 | 0 | default:return_trace (true); |
34 | 3.13k | } |
35 | 3.13k | } |
36 | | |
37 | | void get_anchor (hb_ot_apply_context_t *c, hb_codepoint_t glyph_id, |
38 | | float *x, float *y) const |
39 | 0 | { |
40 | 0 | *x = *y = 0; |
41 | 0 | switch (u.format) { |
42 | 0 | case 1: u.format1.get_anchor (c, glyph_id, x, y); return; |
43 | 0 | case 2: u.format2.get_anchor (c, glyph_id, x, y); return; |
44 | 0 | case 3: u.format3.get_anchor (c, glyph_id, x, y); return; |
45 | 0 | default: return; |
46 | 0 | } |
47 | 0 | } |
48 | | |
49 | | bool subset (hb_subset_context_t *c) const |
50 | 0 | { |
51 | 0 | TRACE_SUBSET (this); |
52 | 0 | switch (u.format) { |
53 | 0 | case 1: return_trace (bool (reinterpret_cast<Anchor *> (u.format1.copy (c->serializer)))); |
54 | 0 | case 2: |
55 | 0 | if (c->plan->flags & HB_SUBSET_FLAGS_NO_HINTING) |
56 | 0 | { |
57 | 0 | // AnchorFormat 2 just containins extra hinting information, so |
58 | 0 | // if hints are being dropped convert to format 1. |
59 | 0 | return_trace (bool (reinterpret_cast<Anchor *> (u.format1.copy (c->serializer)))); |
60 | 0 | } |
61 | 0 | return_trace (bool (reinterpret_cast<Anchor *> (u.format2.copy (c->serializer)))); |
62 | 0 | case 3: return_trace (u.format3.subset (c)); |
63 | 0 | default:return_trace (false); |
64 | 0 | } |
65 | 0 | } |
66 | | |
67 | | void collect_variation_indices (hb_collect_variation_indices_context_t *c) const |
68 | 0 | { |
69 | 0 | switch (u.format) { |
70 | 0 | case 1: case 2: |
71 | 0 | return; |
72 | 0 | case 3: |
73 | 0 | u.format3.collect_variation_indices (c); |
74 | 0 | return; |
75 | 0 | default: return; |
76 | 0 | } |
77 | 0 | } |
78 | | }; |
79 | | |
80 | | } |
81 | | } |
82 | | } |
83 | | |
84 | | #endif // OT_LAYOUT_GPOS_ANCHOR_HH |