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comparison mupdf-source/thirdparty/harfbuzz/src/OT/Layout/GPOS/AnchorMatrix.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_GPOS_ANCHORMATRIX_HH
2 #define OT_LAYOUT_GPOS_ANCHORMATRIX_HH
3
4 namespace OT {
5 namespace Layout {
6 namespace GPOS_impl {
7
8 struct AnchorMatrix
9 {
10 HBUINT16 rows; /* Number of rows */
11 UnsizedArrayOf<Offset16To<Anchor>>
12 matrixZ; /* Matrix of offsets to Anchor tables--
13 * from beginning of AnchorMatrix table */
14 public:
15 DEFINE_SIZE_ARRAY (2, matrixZ);
16
17 bool sanitize (hb_sanitize_context_t *c, unsigned int cols) const
18 {
19 TRACE_SANITIZE (this);
20 if (!c->check_struct (this)) return_trace (false);
21 if (unlikely (hb_unsigned_mul_overflows (rows, cols))) return_trace (false);
22 unsigned int count = rows * cols;
23 if (!c->check_array (matrixZ.arrayZ, count)) return_trace (false);
24 for (unsigned int i = 0; i < count; i++)
25 if (!matrixZ[i].sanitize (c, this)) return_trace (false);
26 return_trace (true);
27 }
28
29 const Anchor& get_anchor (unsigned int row, unsigned int col,
30 unsigned int cols, bool *found) const
31 {
32 *found = false;
33 if (unlikely (row >= rows || col >= cols)) return Null (Anchor);
34 *found = !matrixZ[row * cols + col].is_null ();
35 return this+matrixZ[row * cols + col];
36 }
37
38 template <typename Iterator,
39 hb_requires (hb_is_iterator (Iterator))>
40 void collect_variation_indices (hb_collect_variation_indices_context_t *c,
41 Iterator index_iter) const
42 {
43 for (unsigned i : index_iter)
44 (this+matrixZ[i]).collect_variation_indices (c);
45 }
46
47 template <typename Iterator,
48 hb_requires (hb_is_iterator (Iterator))>
49 bool subset (hb_subset_context_t *c,
50 unsigned num_rows,
51 Iterator index_iter) const
52 {
53 TRACE_SUBSET (this);
54
55 auto *out = c->serializer->start_embed (this);
56
57 if (!index_iter) return_trace (false);
58 if (unlikely (!c->serializer->extend_min (out))) return_trace (false);
59
60 out->rows = num_rows;
61 for (const unsigned i : index_iter)
62 {
63 auto *offset = c->serializer->embed (matrixZ[i]);
64 if (!offset) return_trace (false);
65 offset->serialize_subset (c, matrixZ[i], this);
66 }
67
68 return_trace (true);
69 }
70 };
71
72
73 }
74 }
75 }
76
77 #endif /* OT_LAYOUT_GPOS_ANCHORMATRIX_HH */