Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/harfbuzz/src/OT/glyf/glyf-helpers.hh @ 17:dd9cdb856310

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Remove PKG-INFO from the because it is regenerated automatically for the sdist
author Franz Glasner <fzglas.hg@dom66.de>
date Thu, 18 Sep 2025 17:40:40 +0200
parents b50eed0cc0ef
children
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1 #ifndef OT_GLYF_GLYF_HELPERS_HH
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2 #define OT_GLYF_GLYF_HELPERS_HH
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3
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5 #include "../../hb-open-type.hh"
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6 #include "../../hb-subset-plan.hh"
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8 #include "loca.hh"
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11 namespace OT {
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12 namespace glyf_impl {
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15 template<typename IteratorIn, typename IteratorOut,
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16 hb_requires (hb_is_source_of (IteratorIn, unsigned int)),
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17 hb_requires (hb_is_sink_of (IteratorOut, unsigned))>
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18 static void
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19 _write_loca (IteratorIn&& it, bool short_offsets, IteratorOut&& dest)
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20 {
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21 unsigned right_shift = short_offsets ? 1 : 0;
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22 unsigned int offset = 0;
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23 dest << 0;
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24 + it
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25 | hb_map ([=, &offset] (unsigned int padded_size)
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26 {
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27 offset += padded_size;
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28 DEBUG_MSG (SUBSET, nullptr, "loca entry offset %d", offset);
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29 return offset >> right_shift;
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30 })
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31 | hb_sink (dest)
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32 ;
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33 }
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35 static bool
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36 _add_head_and_set_loca_version (hb_subset_plan_t *plan, bool use_short_loca)
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37 {
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38 hb_blob_t *head_blob = hb_sanitize_context_t ().reference_table<head> (plan->source);
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39 hb_blob_t *head_prime_blob = hb_blob_copy_writable_or_fail (head_blob);
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40 hb_blob_destroy (head_blob);
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42 if (unlikely (!head_prime_blob))
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43 return false;
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45 head *head_prime = (head *) hb_blob_get_data_writable (head_prime_blob, nullptr);
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46 head_prime->indexToLocFormat = use_short_loca ? 0 : 1;
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47 bool success = plan->add_table (HB_OT_TAG_head, head_prime_blob);
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49 hb_blob_destroy (head_prime_blob);
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50 return success;
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51 }
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53 template<typename Iterator,
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54 hb_requires (hb_is_source_of (Iterator, unsigned int))>
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55 static bool
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56 _add_loca_and_head (hb_subset_plan_t * plan, Iterator padded_offsets, bool use_short_loca)
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57 {
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58 unsigned num_offsets = padded_offsets.len () + 1;
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59 unsigned entry_size = use_short_loca ? 2 : 4;
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60 char *loca_prime_data = (char *) hb_calloc (entry_size, num_offsets);
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61
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62 if (unlikely (!loca_prime_data)) return false;
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64 DEBUG_MSG (SUBSET, nullptr, "loca entry_size %d num_offsets %d size %d",
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65 entry_size, num_offsets, entry_size * num_offsets);
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66
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67 if (use_short_loca)
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68 _write_loca (padded_offsets, true, hb_array ((HBUINT16 *) loca_prime_data, num_offsets));
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69 else
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70 _write_loca (padded_offsets, false, hb_array ((HBUINT32 *) loca_prime_data, num_offsets));
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71
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72 hb_blob_t *loca_blob = hb_blob_create (loca_prime_data,
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73 entry_size * num_offsets,
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74 HB_MEMORY_MODE_WRITABLE,
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75 loca_prime_data,
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76 hb_free);
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78 bool result = plan->add_table (HB_OT_TAG_loca, loca_blob)
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79 && _add_head_and_set_loca_version (plan, use_short_loca);
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81 hb_blob_destroy (loca_blob);
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82 return result;
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83 }
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86 } /* namespace glyf_impl */
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87 } /* namespace OT */
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90 #endif /* OT_GLYF_GLYF_HELPERS_HH */