Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/harfbuzz/src/OT/Layout/GSUB/LigatureSubstFormat1.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_LAYOUT_GSUB_LIGATURESUBSTFORMAT1_HH
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2 #define OT_LAYOUT_GSUB_LIGATURESUBSTFORMAT1_HH
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4 #include "Common.hh"
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5 #include "LigatureSet.hh"
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7 namespace OT {
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8 namespace Layout {
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9 namespace GSUB_impl {
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11 template <typename Types>
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12 struct LigatureSubstFormat1_2
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13 {
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14 protected:
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15 HBUINT16 format; /* Format identifier--format = 1 */
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16 typename Types::template OffsetTo<Coverage>
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17 coverage; /* Offset to Coverage table--from
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18 * beginning of Substitution table */
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19 Array16Of<typename Types::template OffsetTo<LigatureSet<Types>>>
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20 ligatureSet; /* Array LigatureSet tables
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21 * ordered by Coverage Index */
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22 public:
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23 DEFINE_SIZE_ARRAY (4 + Types::size, ligatureSet);
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25 bool sanitize (hb_sanitize_context_t *c) const
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26 {
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27 TRACE_SANITIZE (this);
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28 return_trace (coverage.sanitize (c, this) && ligatureSet.sanitize (c, this));
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29 }
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31 bool intersects (const hb_set_t *glyphs) const
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32 {
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33 return
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34 + hb_zip (this+coverage, ligatureSet)
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35 | hb_filter (*glyphs, hb_first)
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36 | hb_map (hb_second)
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37 | hb_map ([this, glyphs] (const typename Types::template OffsetTo<LigatureSet<Types>> &_)
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38 { return (this+_).intersects (glyphs); })
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39 | hb_any
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40 ;
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41 }
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43 bool may_have_non_1to1 () const
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44 { return true; }
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46 void closure (hb_closure_context_t *c) const
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47 {
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48 + hb_zip (this+coverage, ligatureSet)
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49 | hb_filter (c->parent_active_glyphs (), hb_first)
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50 | hb_map (hb_second)
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51 | hb_map (hb_add (this))
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52 | hb_apply ([c] (const LigatureSet<Types> &_) { _.closure (c); })
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53 ;
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55 }
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57 void closure_lookups (hb_closure_lookups_context_t *c) const {}
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59 void collect_glyphs (hb_collect_glyphs_context_t *c) const
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60 {
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61 if (unlikely (!(this+coverage).collect_coverage (c->input))) return;
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63 + hb_zip (this+coverage, ligatureSet)
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64 | hb_map (hb_second)
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65 | hb_map (hb_add (this))
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66 | hb_apply ([c] (const LigatureSet<Types> &_) { _.collect_glyphs (c); })
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67 ;
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68 }
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70 const Coverage &get_coverage () const { return this+coverage; }
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72 bool would_apply (hb_would_apply_context_t *c) const
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73 {
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74 unsigned int index = (this+coverage).get_coverage (c->glyphs[0]);
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75 if (likely (index == NOT_COVERED)) return false;
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77 const auto &lig_set = this+ligatureSet[index];
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78 return lig_set.would_apply (c);
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79 }
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81 bool apply (hb_ot_apply_context_t *c) const
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82 {
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83 TRACE_APPLY (this);
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85 unsigned int index = (this+coverage).get_coverage (c->buffer->cur ().codepoint);
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86 if (likely (index == NOT_COVERED)) return_trace (false);
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88 const auto &lig_set = this+ligatureSet[index];
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89 return_trace (lig_set.apply (c));
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90 }
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92 bool serialize (hb_serialize_context_t *c,
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93 hb_sorted_array_t<const HBGlyphID16> first_glyphs,
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94 hb_array_t<const unsigned int> ligature_per_first_glyph_count_list,
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95 hb_array_t<const HBGlyphID16> ligatures_list,
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96 hb_array_t<const unsigned int> component_count_list,
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97 hb_array_t<const HBGlyphID16> component_list /* Starting from second for each ligature */)
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98 {
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99 TRACE_SERIALIZE (this);
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100 if (unlikely (!c->extend_min (this))) return_trace (false);
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101 if (unlikely (!ligatureSet.serialize (c, first_glyphs.length))) return_trace (false);
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102 for (unsigned int i = 0; i < first_glyphs.length; i++)
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103 {
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104 unsigned int ligature_count = ligature_per_first_glyph_count_list[i];
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105 if (unlikely (!ligatureSet[i]
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106 .serialize_serialize (c,
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107 ligatures_list.sub_array (0, ligature_count),
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108 component_count_list.sub_array (0, ligature_count),
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109 component_list))) return_trace (false);
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110 ligatures_list += ligature_count;
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111 component_count_list += ligature_count;
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112 }
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113 return_trace (coverage.serialize_serialize (c, first_glyphs));
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114 }
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115
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116 bool subset (hb_subset_context_t *c) const
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117 {
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118 TRACE_SUBSET (this);
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119 const hb_set_t &glyphset = *c->plan->glyphset_gsub ();
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120 const hb_map_t &glyph_map = *c->plan->glyph_map;
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121
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122 auto *out = c->serializer->start_embed (*this);
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123 if (unlikely (!c->serializer->extend_min (out))) return_trace (false);
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124 out->format = format;
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125
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126 // Due to a bug in some older versions of windows 7 the Coverage table must be
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127 // packed after the LigatureSet and Ligature tables, so serialize Coverage first
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128 // which places it last in the packed order.
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129 hb_set_t new_coverage;
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130 + hb_zip (this+coverage, hb_iter (ligatureSet) | hb_map (hb_add (this)))
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131 | hb_filter (glyphset, hb_first)
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132 | hb_filter ([&] (const LigatureSet<Types>& _) {
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133 return _.intersects (&glyphset);
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134 }, hb_second)
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135 | hb_map (hb_first)
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136 | hb_sink (new_coverage);
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137
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138 if (!c->serializer->push<Coverage> ()
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139 ->serialize (c->serializer,
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140 + new_coverage.iter () | hb_map_retains_sorting (glyph_map)))
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141 {
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142 c->serializer->pop_discard ();
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143 return_trace (false);
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144 }
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145
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146 unsigned coverage_idx = c->serializer->pop_pack ();
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147 c->serializer->add_link (out->coverage, coverage_idx);
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148
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149 + hb_zip (this+coverage, ligatureSet)
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150 | hb_filter (new_coverage, hb_first)
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151 | hb_map (hb_second)
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152 // to ensure that the repacker always orders the coverage table after the LigatureSet
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153 // and LigatureSubtable's they will be linked to the Coverage table via a virtual link
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parents:
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154 // the coverage table object idx is passed down to facilitate this.
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155 | hb_apply (subset_offset_array (c, out->ligatureSet, this, coverage_idx))
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156 ;
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157
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parents:
diff changeset
158 return_trace (bool (new_coverage));
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159 }
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parents:
diff changeset
160 };
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161
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162 }
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parents:
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163 }
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164 }
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165
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166 #endif /* OT_LAYOUT_GSUB_LIGATURESUBSTFORMAT1_HH */