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annotate mupdf-source/thirdparty/harfbuzz/src/OT/Layout/GPOS/LigatureArray.hh @ 30:fc4555a3097b

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>>>>> tag v1.26.4+1 for changeset f76e6575dca9
author Franz Glasner <fzglas.hg@dom66.de>
date Fri, 19 Sep 2025 19:59:44 +0200
parents b50eed0cc0ef
children
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1 #ifndef OT_LAYOUT_GPOS_LIGATUREARRAY_HH
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2 #define OT_LAYOUT_GPOS_LIGATUREARRAY_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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9 typedef AnchorMatrix LigatureAttach; /* component-major--
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10 * in order of writing direction--,
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11 * mark-minor--
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12 * ordered by class--zero-based. */
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14 /* Array of LigatureAttach tables ordered by LigatureCoverage Index */
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15 struct LigatureArray : List16OfOffset16To<LigatureAttach>
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16 {
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17 template <typename Iterator,
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18 hb_requires (hb_is_iterator (Iterator))>
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19 bool subset (hb_subset_context_t *c,
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20 Iterator coverage,
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21 unsigned class_count,
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22 const hb_map_t *klass_mapping) const
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23 {
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24 TRACE_SUBSET (this);
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25 const hb_set_t &glyphset = *c->plan->glyphset_gsub ();
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27 auto *out = c->serializer->start_embed (this);
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28 if (unlikely (!c->serializer->extend_min (out))) return_trace (false);
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30 for (const auto _ : + hb_zip (coverage, *this)
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31 | hb_filter (glyphset, hb_first))
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32 {
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33 auto *matrix = out->serialize_append (c->serializer);
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34 if (unlikely (!matrix)) return_trace (false);
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36 const LigatureAttach& src = (this + _.second);
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37 auto indexes =
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38 + hb_range (src.rows * class_count)
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39 | hb_filter ([=] (unsigned index) { return klass_mapping->has (index % class_count); })
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40 ;
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41 matrix->serialize_subset (c,
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42 _.second,
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43 this,
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44 src.rows,
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45 indexes);
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46 }
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47 return_trace (this->len);
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48 }
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49 };
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52 }
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53 }
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54 }
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56 #endif /* OT_LAYOUT_GPOS_LIGATUREARRAY_HH */