Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/harfbuzz/src/OT/Layout/GSUB/SingleSubstFormat2.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 #ifndef OT_LAYOUT_GSUB_SINGLESUBSTFORMAT2_HH
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2 #define OT_LAYOUT_GSUB_SINGLESUBSTFORMAT2_HH
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4 #include "Common.hh"
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6 namespace OT {
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7 namespace Layout {
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8 namespace GSUB_impl {
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10 template <typename Types>
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11 struct SingleSubstFormat2_4
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12 {
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13 protected:
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14 HBUINT16 format; /* Format identifier--format = 2 */
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15 typename Types::template OffsetTo<Coverage>
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16 coverage; /* Offset to Coverage table--from
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17 * beginning of Substitution table */
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18 Array16Of<typename Types::HBGlyphID>
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19 substitute; /* Array of substitute
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20 * GlyphIDs--ordered by Coverage Index */
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22 public:
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23 DEFINE_SIZE_ARRAY (4 + Types::size, substitute);
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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) && substitute.sanitize (c));
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29 }
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31 bool intersects (const hb_set_t *glyphs) const
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32 { return (this+coverage).intersects (glyphs); }
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34 bool may_have_non_1to1 () const
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35 { return false; }
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37 void closure (hb_closure_context_t *c) const
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38 {
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39 auto &cov = this+coverage;
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40 auto &glyph_set = c->parent_active_glyphs ();
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41
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42 if (substitute.len > glyph_set.get_population () * 4)
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43 {
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44 for (auto g : glyph_set)
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45 {
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46 unsigned i = cov.get_coverage (g);
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47 if (i == NOT_COVERED || i >= substitute.len)
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48 continue;
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49 c->output->add (substitute.arrayZ[i]);
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50 }
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52 return;
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53 }
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55 + hb_zip (cov, substitute)
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56 | hb_filter (glyph_set, hb_first)
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57 | hb_map (hb_second)
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58 | hb_sink (c->output)
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59 ;
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60 }
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62 void closure_lookups (hb_closure_lookups_context_t *c) const {}
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64 void collect_glyphs (hb_collect_glyphs_context_t *c) const
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65 {
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66 if (unlikely (!(this+coverage).collect_coverage (c->input))) return;
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67 + hb_zip (this+coverage, substitute)
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68 | hb_map (hb_second)
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69 | hb_sink (c->output)
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70 ;
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71 }
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73 const Coverage &get_coverage () const { return this+coverage; }
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75 bool would_apply (hb_would_apply_context_t *c) const
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76 { return c->len == 1 && (this+coverage).get_coverage (c->glyphs[0]) != NOT_COVERED; }
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78 bool apply (hb_ot_apply_context_t *c) const
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79 {
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80 TRACE_APPLY (this);
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81 unsigned int index = (this+coverage).get_coverage (c->buffer->cur().codepoint);
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82 if (likely (index == NOT_COVERED)) return_trace (false);
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84 if (unlikely (index >= substitute.len)) return_trace (false);
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86 if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ())
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87 {
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88 c->buffer->sync_so_far ();
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89 c->buffer->message (c->font,
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90 "replacing glyph at %d (single substitution)",
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91 c->buffer->idx);
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92 }
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94 c->replace_glyph (substitute[index]);
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96 if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ())
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97 {
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98 c->buffer->message (c->font,
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99 "replaced glyph at %d (single substitution)",
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100 c->buffer->idx - 1);
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101 }
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102
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103 return_trace (true);
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104 }
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105
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106 template<typename Iterator,
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107 hb_requires (hb_is_sorted_source_of (Iterator,
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108 hb_codepoint_pair_t))>
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109 bool serialize (hb_serialize_context_t *c,
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110 Iterator it)
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111 {
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112 TRACE_SERIALIZE (this);
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113 auto substitutes =
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114 + it
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115 | hb_map (hb_second)
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116 ;
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117 auto glyphs =
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118 + it
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119 | hb_map_retains_sorting (hb_first)
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120 ;
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121 if (unlikely (!c->extend_min (this))) return_trace (false);
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122 if (unlikely (!substitute.serialize (c, substitutes))) return_trace (false);
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123 if (unlikely (!coverage.serialize_serialize (c, glyphs))) return_trace (false);
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124 return_trace (true);
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125 }
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126
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127 bool subset (hb_subset_context_t *c) const
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128 {
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129 TRACE_SUBSET (this);
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130 const hb_set_t &glyphset = *c->plan->glyphset_gsub ();
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131 const hb_map_t &glyph_map = *c->plan->glyph_map;
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132
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133 auto it =
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134 + hb_zip (this+coverage, substitute)
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135 | hb_filter (glyphset, hb_first)
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136 | hb_filter (glyphset, hb_second)
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137 | hb_map_retains_sorting ([&] (hb_pair_t<hb_codepoint_t, const typename Types::HBGlyphID &> p) -> hb_codepoint_pair_t
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138 { return hb_pair (glyph_map[p.first], glyph_map[p.second]); })
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139 ;
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140
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141 bool ret = bool (it);
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142 SingleSubst_serialize (c->serializer, it);
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143 return_trace (ret);
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144 }
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145 };
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146
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147 }
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148 }
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149 }
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150
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151 #endif /* OT_LAYOUT_GSUB_SINGLESUBSTFORMAT2_HH */