Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/harfbuzz/src/hb-shaper.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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2
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1 /*
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2 * Copyright © 2012 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): Behdad Esfahbod
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25 */
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26
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27 #include "hb.hh"
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28 #include "hb-shaper.hh"
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29 #include "hb-machinery.hh"
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31
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32 static const hb_shaper_entry_t _hb_all_shapers[] = {
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33 #define HB_SHAPER_IMPLEMENT(name) {#name, _hb_##name##_shape},
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34 #include "hb-shaper-list.hh"
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35 #undef HB_SHAPER_IMPLEMENT
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36 };
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37 #ifndef HB_NO_SHAPER
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38 static_assert (0 != ARRAY_LENGTH_CONST (_hb_all_shapers), "No shaper enabled.");
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39 #endif
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41 static inline void free_static_shapers ();
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42
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43 static struct hb_shapers_lazy_loader_t : hb_lazy_loader_t<hb_shaper_entry_t,
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44 hb_shapers_lazy_loader_t>
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45 {
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46 static hb_shaper_entry_t *create ()
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47 {
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48 char *env = getenv ("HB_SHAPER_LIST");
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49 if (!env || !*env)
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50 return nullptr;
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51
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52 hb_shaper_entry_t *shapers = (hb_shaper_entry_t *) hb_calloc (1, sizeof (_hb_all_shapers));
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53 if (unlikely (!shapers))
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54 return nullptr;
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55
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56 hb_memcpy (shapers, _hb_all_shapers, sizeof (_hb_all_shapers));
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57
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58 /* Reorder shaper list to prefer requested shapers. */
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59 unsigned int i = 0;
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60 char *end, *p = env;
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61 for (;;)
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62 {
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63 end = strchr (p, ',');
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64 if (!end)
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65 end = p + strlen (p);
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66
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67 for (unsigned int j = i; j < ARRAY_LENGTH_CONST (_hb_all_shapers); j++)
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68 if (end - p == (int) strlen (shapers[j].name) &&
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69 0 == strncmp (shapers[j].name, p, end - p))
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70 {
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71 /* Reorder this shaper to position i */
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72 struct hb_shaper_entry_t t = shapers[j];
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73 memmove (&shapers[i + 1], &shapers[i], sizeof (shapers[i]) * (j - i));
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74 shapers[i] = t;
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75 i++;
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76 }
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77
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78 if (!*end)
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79 break;
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80 else
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81 p = end + 1;
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82 }
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83
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84 hb_atexit (free_static_shapers);
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85
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86 return shapers;
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87 }
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88 static void destroy (hb_shaper_entry_t *p) { hb_free (p); }
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89 static const hb_shaper_entry_t *get_null () { return _hb_all_shapers; }
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90 } static_shapers;
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91
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92 static inline
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93 void free_static_shapers ()
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94 {
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95 static_shapers.free_instance ();
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96 }
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97
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98 const hb_shaper_entry_t *
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99 _hb_shapers_get ()
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
100 {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
101 return static_shapers.get_unconst ();
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
102 }