Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/harfbuzz/src/hb-aat-map.cc @ 32:72c1b70d4f5c

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author Franz Glasner <fzglas.hg@dom66.de>
date Sun, 21 Sep 2025 15:10:12 +0200
parents b50eed0cc0ef
children
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1 /*
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2 * Copyright © 2009,2010 Red Hat, Inc.
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3 * Copyright © 2010,2011,2013 Google, Inc.
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4 *
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5 * This is part of HarfBuzz, a text shaping library.
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6 *
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7 * Permission is hereby granted, without written agreement and without
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8 * license or royalty fees, to use, copy, modify, and distribute this
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9 * software and its documentation for any purpose, provided that the
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10 * above copyright notice and the following two paragraphs appear in
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11 * all copies of this software.
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12 *
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13 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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14 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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15 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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16 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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17 * DAMAGE.
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18 *
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19 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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20 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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21 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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22 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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23 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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24 *
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25 * Red Hat Author(s): Behdad Esfahbod
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26 * Google Author(s): Behdad Esfahbod
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27 */
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29 #include "hb.hh"
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31 #ifndef HB_NO_AAT_SHAPE
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33 #include "hb-aat-map.hh"
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35 #include "hb-aat-layout.hh"
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36 #include "hb-aat-layout-feat-table.hh"
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39 void hb_aat_map_builder_t::add_feature (hb_tag_t tag, unsigned value)
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40 {
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41 if (!face->table.feat->has_data ()) return;
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43 if (tag == HB_TAG ('a','a','l','t'))
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44 {
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45 if (!face->table.feat->exposes_feature (HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_ALTERNATIVES))
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46 return;
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47 feature_info_t *info = features.push();
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48 info->type = HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_ALTERNATIVES;
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49 info->setting = (hb_aat_layout_feature_selector_t) value;
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50 info->seq = features.length;
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51 info->is_exclusive = true;
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52 return;
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53 }
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54
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55 const hb_aat_feature_mapping_t *mapping = hb_aat_layout_find_feature_mapping (tag);
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56 if (!mapping) return;
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57
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58 const AAT::FeatureName* feature = &face->table.feat->get_feature (mapping->aatFeatureType);
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59 if (!feature->has_data ())
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60 {
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61 /* Special case: Chain::compile_flags will fall back to the deprecated version of
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62 * small-caps if necessary, so we need to check for that possibility.
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63 * https://github.com/harfbuzz/harfbuzz/issues/2307 */
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64 if (mapping->aatFeatureType == HB_AAT_LAYOUT_FEATURE_TYPE_LOWER_CASE &&
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65 mapping->selectorToEnable == HB_AAT_LAYOUT_FEATURE_SELECTOR_LOWER_CASE_SMALL_CAPS)
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66 {
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67 feature = &face->table.feat->get_feature (HB_AAT_LAYOUT_FEATURE_TYPE_LETTER_CASE);
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68 if (!feature->has_data ()) return;
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69 }
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70 else return;
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71 }
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72
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73 feature_info_t *info = features.push();
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74 info->type = mapping->aatFeatureType;
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75 info->setting = value ? mapping->selectorToEnable : mapping->selectorToDisable;
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76 info->seq = features.length;
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77 info->is_exclusive = feature->is_exclusive ();
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78 }
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79
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80 void
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81 hb_aat_map_builder_t::compile (hb_aat_map_t &m)
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82 {
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83 /* Sort features and merge duplicates */
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84 if (features.length)
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85 {
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86 features.qsort ();
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87 unsigned int j = 0;
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88 for (unsigned int i = 1; i < features.length; i++)
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89 if (features[i].type != features[j].type ||
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90 /* Nonexclusive feature selectors come in even/odd pairs to turn a setting on/off
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91 * respectively, so we mask out the low-order bit when checking for "duplicates"
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92 * (selectors referring to the same feature setting) here. */
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93 (!features[i].is_exclusive && ((features[i].setting & ~1) != (features[j].setting & ~1))))
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94 features[++j] = features[i];
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95 features.shrink (j + 1);
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96 }
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97
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parents:
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98 hb_aat_layout_compile_map (this, &m);
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parents:
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99 }
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parents:
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b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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parents:
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102 #endif