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annotate mupdf-source/thirdparty/harfbuzz/src/hb-shaper.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 © 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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27 #ifndef HB_SHAPER_HH
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28 #define HB_SHAPER_HH
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29
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30 #include "hb.hh"
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31 #include "hb-machinery.hh"
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32
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33 typedef hb_bool_t hb_shape_func_t (hb_shape_plan_t *shape_plan,
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34 hb_font_t *font,
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35 hb_buffer_t *buffer,
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36 const hb_feature_t *features,
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37 unsigned int num_features);
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38
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39 #define HB_SHAPER_IMPLEMENT(name) \
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40 extern "C" HB_INTERNAL hb_shape_func_t _hb_##name##_shape;
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41 #include "hb-shaper-list.hh"
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42 #undef HB_SHAPER_IMPLEMENT
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44 struct hb_shaper_entry_t {
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45 char name[16];
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46 hb_shape_func_t *func;
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47 };
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48
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49 HB_INTERNAL const hb_shaper_entry_t *
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50 _hb_shapers_get ();
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52
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53 template <typename Data, unsigned int WheresData, typename T>
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54 struct hb_shaper_lazy_loader_t;
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56 #define HB_SHAPER_ORDER(Shaper) \
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57 HB_PASTE (HB_SHAPER_ORDER_, Shaper)
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58 enum hb_shaper_order_t
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59 {
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60 _HB_SHAPER_ORDER_ORDER_ZERO,
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61 #define HB_SHAPER_IMPLEMENT(Shaper) \
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62 HB_SHAPER_ORDER (Shaper),
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63 #include "hb-shaper-list.hh"
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64 #undef HB_SHAPER_IMPLEMENT
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65 _HB_SHAPERS_COUNT_PLUS_ONE,
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66 HB_SHAPERS_COUNT = _HB_SHAPERS_COUNT_PLUS_ONE - 1,
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67 };
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68
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69 template <enum hb_shaper_order_t order, typename Object> struct hb_shaper_object_data_type_t;
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71 #define HB_SHAPER_DATA_SUCCEEDED ((void *) +1)
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72 #define HB_SHAPER_DATA_TYPE(shaper, object) hb_##shaper##_##object##_data_t
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73 #define HB_SHAPER_DATA_CREATE_FUNC(shaper, object) _hb_##shaper##_shaper_##object##_data_create
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74 #define HB_SHAPER_DATA_DESTROY_FUNC(shaper, object) _hb_##shaper##_shaper_##object##_data_destroy
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75
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76 #define HB_SHAPER_DATA_INSTANTIATE_SHAPERS(shaper, object) \
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77 \
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78 struct HB_SHAPER_DATA_TYPE (shaper, object); /* Type forward declaration. */ \
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79 extern "C" HB_INTERNAL HB_SHAPER_DATA_TYPE (shaper, object) * \
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80 HB_SHAPER_DATA_CREATE_FUNC (shaper, object) (hb_##object##_t *object); \
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81 extern "C" HB_INTERNAL void \
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82 HB_SHAPER_DATA_DESTROY_FUNC (shaper, object) (HB_SHAPER_DATA_TYPE (shaper, object) *shaper##_##object); \
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83 \
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84 template <> \
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85 struct hb_shaper_object_data_type_t<HB_SHAPER_ORDER (shaper), hb_##object##_t> \
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86 { \
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87 typedef HB_SHAPER_DATA_TYPE(shaper, object) value; \
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88 }; \
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89 \
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90 template <unsigned int WheresData> \
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91 struct hb_shaper_lazy_loader_t<hb_##object##_t, WheresData, HB_SHAPER_DATA_TYPE(shaper, object)> \
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92 : hb_lazy_loader_t<HB_SHAPER_DATA_TYPE(shaper, object), \
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93 hb_shaper_lazy_loader_t<hb_##object##_t, \
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94 WheresData, \
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95 HB_SHAPER_DATA_TYPE(shaper, object)>, \
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96 hb_##object##_t, WheresData> \
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97 { \
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98 typedef HB_SHAPER_DATA_TYPE(shaper, object) Type; \
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99 static Type* create (hb_##object##_t *data) \
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100 { return HB_SHAPER_DATA_CREATE_FUNC (shaper, object) (data); } \
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101 static Type *get_null () { return nullptr; } \
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102 static void destroy (Type *p) { HB_SHAPER_DATA_DESTROY_FUNC (shaper, object) (p); } \
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103 }; \
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104 \
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105 static_assert (true, "") /* Require semicolon after. */
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106
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107
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108 template <typename Object>
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109 struct hb_shaper_object_dataset_t
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110 {
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111 void init0 (Object *parent_data)
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112 {
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113 this->parent_data = parent_data;
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114 #define HB_SHAPER_IMPLEMENT(shaper) shaper.init0 ();
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115 #include "hb-shaper-list.hh"
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116 #undef HB_SHAPER_IMPLEMENT
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117 }
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118 void fini ()
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119 {
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120 #define HB_SHAPER_IMPLEMENT(shaper) shaper.fini ();
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121 #include "hb-shaper-list.hh"
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122 #undef HB_SHAPER_IMPLEMENT
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123 }
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124
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125 Object *parent_data; /* MUST be JUST before the lazy loaders. */
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126 #define HB_SHAPER_IMPLEMENT(shaper) \
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127 hb_shaper_lazy_loader_t<Object, HB_SHAPER_ORDER(shaper), \
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128 typename hb_shaper_object_data_type_t<HB_SHAPER_ORDER(shaper), Object>::value \
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129 > shaper;
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130 #include "hb-shaper-list.hh"
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131 #undef HB_SHAPER_IMPLEMENT
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132 };
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133
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134 #endif /* HB_SHAPER_HH */