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annotate mupdf-source/thirdparty/harfbuzz/src/OT/Layout/GPOS/AnchorMatrix.hh @ 40:aa33339d6b8a upstream

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ADD: MuPDF v1.26.10: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.5.
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 11 Oct 2025 11:31:38 +0200
parents b50eed0cc0ef
children
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1 #ifndef OT_LAYOUT_GPOS_ANCHORMATRIX_HH
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2 #define OT_LAYOUT_GPOS_ANCHORMATRIX_HH
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4 namespace OT {
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5 namespace Layout {
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6 namespace GPOS_impl {
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8 struct AnchorMatrix
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9 {
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10 HBUINT16 rows; /* Number of rows */
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11 UnsizedArrayOf<Offset16To<Anchor>>
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12 matrixZ; /* Matrix of offsets to Anchor tables--
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13 * from beginning of AnchorMatrix table */
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14 public:
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15 DEFINE_SIZE_ARRAY (2, matrixZ);
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17 bool sanitize (hb_sanitize_context_t *c, unsigned int cols) const
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18 {
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19 TRACE_SANITIZE (this);
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20 if (!c->check_struct (this)) return_trace (false);
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21 if (unlikely (hb_unsigned_mul_overflows (rows, cols))) return_trace (false);
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22 unsigned int count = rows * cols;
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23 if (!c->check_array (matrixZ.arrayZ, count)) return_trace (false);
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24 for (unsigned int i = 0; i < count; i++)
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25 if (!matrixZ[i].sanitize (c, this)) return_trace (false);
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26 return_trace (true);
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27 }
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29 const Anchor& get_anchor (unsigned int row, unsigned int col,
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30 unsigned int cols, bool *found) const
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31 {
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32 *found = false;
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33 if (unlikely (row >= rows || col >= cols)) return Null (Anchor);
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34 *found = !matrixZ[row * cols + col].is_null ();
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35 return this+matrixZ[row * cols + col];
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36 }
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38 template <typename Iterator,
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39 hb_requires (hb_is_iterator (Iterator))>
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40 void collect_variation_indices (hb_collect_variation_indices_context_t *c,
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41 Iterator index_iter) const
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42 {
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43 for (unsigned i : index_iter)
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44 (this+matrixZ[i]).collect_variation_indices (c);
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45 }
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47 template <typename Iterator,
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48 hb_requires (hb_is_iterator (Iterator))>
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49 bool subset (hb_subset_context_t *c,
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50 unsigned num_rows,
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51 Iterator index_iter) const
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52 {
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53 TRACE_SUBSET (this);
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55 auto *out = c->serializer->start_embed (this);
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57 if (!index_iter) return_trace (false);
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58 if (unlikely (!c->serializer->extend_min (out))) return_trace (false);
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60 out->rows = num_rows;
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61 for (const unsigned i : index_iter)
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62 {
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63 auto *offset = c->serializer->embed (matrixZ[i]);
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64 if (!offset) return_trace (false);
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65 offset->serialize_subset (c, matrixZ[i], this);
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66 }
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68 return_trace (true);
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69 }
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70 };
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73 }
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74 }
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75 }
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77 #endif /* OT_LAYOUT_GPOS_ANCHORMATRIX_HH */