Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/harfbuzz/src/OT/Layout/GSUB/Sequence.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_SEQUENCE_HH
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2 #define OT_LAYOUT_GSUB_SEQUENCE_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 Sequence
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12 {
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13 protected:
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14 Array16Of<typename Types::HBGlyphID>
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15 substitute; /* String of GlyphIDs to substitute */
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16 public:
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17 DEFINE_SIZE_ARRAY (2, substitute);
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19 bool sanitize (hb_sanitize_context_t *c) const
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20 {
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21 TRACE_SANITIZE (this);
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22 return_trace (substitute.sanitize (c));
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23 }
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25 bool intersects (const hb_set_t *glyphs) const
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26 { return hb_all (substitute, glyphs); }
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28 void closure (hb_closure_context_t *c) const
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29 { c->output->add_array (substitute.arrayZ, substitute.len); }
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31 void collect_glyphs (hb_collect_glyphs_context_t *c) const
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32 { c->output->add_array (substitute.arrayZ, substitute.len); }
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34 bool apply (hb_ot_apply_context_t *c) const
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35 {
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36 TRACE_APPLY (this);
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37 unsigned int count = substitute.len;
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39 /* Special-case to make it in-place and not consider this
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40 * as a "multiplied" substitution. */
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41 if (unlikely (count == 1))
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42 {
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43 if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ())
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44 {
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45 c->buffer->sync_so_far ();
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46 c->buffer->message (c->font,
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47 "replacing glyph at %d (multiple substitution)",
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48 c->buffer->idx);
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49 }
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51 c->replace_glyph (substitute.arrayZ[0]);
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53 if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ())
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54 {
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55 c->buffer->message (c->font,
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56 "replaced glyph at %d (multiple subtitution)",
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57 c->buffer->idx - 1);
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58 }
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60 return_trace (true);
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61 }
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62 /* Spec disallows this, but Uniscribe allows it.
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63 * https://github.com/harfbuzz/harfbuzz/issues/253 */
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64 else if (unlikely (count == 0))
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65 {
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66 if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ())
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67 {
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68 c->buffer->sync_so_far ();
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69 c->buffer->message (c->font,
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70 "deleting glyph at %d (multiple substitution)",
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71 c->buffer->idx);
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72 }
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74 c->buffer->delete_glyph ();
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76 if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ())
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77 {
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78 c->buffer->sync_so_far ();
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79 c->buffer->message (c->font,
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80 "deleted glyph at %d (multiple substitution)",
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81 c->buffer->idx);
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82 }
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84 return_trace (true);
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85 }
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87 if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ())
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88 {
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89 c->buffer->sync_so_far ();
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90 c->buffer->message (c->font,
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91 "multiplying glyph at %d",
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92 c->buffer->idx);
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93 }
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95 unsigned int klass = _hb_glyph_info_is_ligature (&c->buffer->cur()) ?
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96 HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH : 0;
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97 unsigned lig_id = _hb_glyph_info_get_lig_id (&c->buffer->cur());
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99 for (unsigned int i = 0; i < count; i++)
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100 {
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101 /* If is attached to a ligature, don't disturb that.
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102 * https://github.com/harfbuzz/harfbuzz/issues/3069 */
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103 if (!lig_id)
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104 _hb_glyph_info_set_lig_props_for_component (&c->buffer->cur(), i);
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105 c->output_glyph_for_component (substitute.arrayZ[i], klass);
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106 }
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107 c->buffer->skip_glyph ();
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108
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109 if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ())
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110 {
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111 c->buffer->sync_so_far ();
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112
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113 char buf[HB_MAX_CONTEXT_LENGTH * 16] = {0};
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114 char *p = buf;
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115
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116 for (unsigned i = c->buffer->idx - count; i < c->buffer->idx; i++)
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117 {
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118 if (buf < p)
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119 *p++ = ',';
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120 snprintf (p, sizeof(buf) - (p - buf), "%u", i);
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121 p += strlen(p);
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122 }
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123
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124 c->buffer->message (c->font,
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125 "multiplied glyphs at %s",
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126 buf);
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127 }
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128
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129 return_trace (true);
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130 }
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131
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132 template <typename Iterator,
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133 hb_requires (hb_is_source_of (Iterator, hb_codepoint_t))>
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134 bool serialize (hb_serialize_context_t *c,
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135 Iterator subst)
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136 {
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137 TRACE_SERIALIZE (this);
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138 return_trace (substitute.serialize (c, subst));
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139 }
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140
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141 bool subset (hb_subset_context_t *c) const
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142 {
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143 TRACE_SUBSET (this);
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144 const hb_set_t &glyphset = *c->plan->glyphset_gsub ();
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145 const hb_map_t &glyph_map = *c->plan->glyph_map;
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146
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147 if (!intersects (&glyphset)) return_trace (false);
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148
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149 auto it =
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150 + hb_iter (substitute)
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151 | hb_map (glyph_map)
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152 ;
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153
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154 auto *out = c->serializer->start_embed (*this);
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155 return_trace (out->serialize (c->serializer, it));
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156 }
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157 };
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158
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159
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160 }
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161 }
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162 }
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163
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164
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165 #endif /* OT_LAYOUT_GSUB_SEQUENCE_HH */