Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/harfbuzz/src/hb-subset-accelerator.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 /*
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2 * Copyright © 2022 Google, Inc.
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3 *
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4 * This is part of HarfBuzz, a text shaping library.
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5 *
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6 * Permission is hereby granted, without written agreement and without
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7 * license or royalty fees, to use, copy, modify, and distribute this
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8 * software and its documentation for any purpose, provided that the
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9 * above copyright notice and the following two paragraphs appear in
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10 * all copies of this software.
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11 *
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12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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16 * DAMAGE.
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17 *
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18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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23 *
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24 * Google Author(s): Garret Rieger
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25 */
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27 #ifndef HB_SUBSET_ACCELERATOR_HH
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28 #define HB_SUBSET_ACCELERATOR_HH
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31 #include "hb.hh"
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33 #include "hb-map.hh"
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34 #include "hb-multimap.hh"
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35 #include "hb-set.hh"
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37 extern HB_INTERNAL hb_user_data_key_t _hb_subset_accelerator_user_data_key;
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39 namespace CFF {
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40 struct cff_subset_accelerator_t;
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41 }
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43 namespace OT {
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44 struct SubtableUnicodesCache;
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45 };
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47 struct hb_subset_accelerator_t
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48 {
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49 static hb_user_data_key_t* user_data_key()
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50 {
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51 return &_hb_subset_accelerator_user_data_key;
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52 }
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54 static hb_subset_accelerator_t* create(const hb_map_t& unicode_to_gid_,
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55 const hb_multimap_t gid_to_unicodes_,
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56 const hb_set_t& unicodes_,
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57 bool has_seac_) {
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58 hb_subset_accelerator_t* accel =
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59 (hb_subset_accelerator_t*) hb_malloc (sizeof(hb_subset_accelerator_t));
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60 new (accel) hb_subset_accelerator_t (unicode_to_gid_, gid_to_unicodes_, unicodes_);
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61 accel->has_seac = has_seac_;
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62 return accel;
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63 }
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64
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65 static void destroy(void* value) {
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66 if (!value) return;
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68 hb_subset_accelerator_t* accel = (hb_subset_accelerator_t*) value;
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70 if (accel->cff_accelerator && accel->destroy_cff_accelerator)
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71 accel->destroy_cff_accelerator ((void*) accel->cff_accelerator);
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72
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73 if (accel->cmap_cache && accel->destroy_cmap_cache)
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74 accel->destroy_cmap_cache ((void*) accel->cmap_cache);
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76 accel->~hb_subset_accelerator_t ();
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77 hb_free (accel);
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78 }
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80 hb_subset_accelerator_t (const hb_map_t& unicode_to_gid_,
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81 const hb_multimap_t& gid_to_unicodes_,
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82 const hb_set_t& unicodes_)
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83 : unicode_to_gid(unicode_to_gid_), gid_to_unicodes (gid_to_unicodes_), unicodes(unicodes_),
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84 cmap_cache(nullptr), destroy_cmap_cache(nullptr),
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85 has_seac(false), cff_accelerator(nullptr), destroy_cff_accelerator(nullptr)
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86 { sanitized_table_cache_lock.init (); }
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87
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88 ~hb_subset_accelerator_t ()
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89 { sanitized_table_cache_lock.fini (); }
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90
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91 // Generic
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93 mutable hb_mutex_t sanitized_table_cache_lock;
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94 mutable hb_hashmap_t<hb_tag_t, hb::unique_ptr<hb_blob_t>> sanitized_table_cache;
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96 const hb_map_t unicode_to_gid;
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97 const hb_multimap_t gid_to_unicodes;
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98 const hb_set_t unicodes;
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99
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100 // cmap
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101 const OT::SubtableUnicodesCache* cmap_cache;
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102 hb_destroy_func_t destroy_cmap_cache;
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103
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104 // CFF
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105 bool has_seac;
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106 const CFF::cff_subset_accelerator_t* cff_accelerator;
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107 hb_destroy_func_t destroy_cff_accelerator;
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108
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109 // TODO(garretrieger): cumulative glyf checksum map
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110
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111 bool in_error () const
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112 {
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113 return unicode_to_gid.in_error () ||
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114 gid_to_unicodes.in_error () ||
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115 unicodes.in_error () ||
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116 sanitized_table_cache.in_error ();
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117 }
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118 };
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119
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120
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121 #endif /* HB_SUBSET_ACCELERATOR_HH */