Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/harfbuzz/src/OT/Layout/GPOS/SinglePosFormat1.hh @ 26:a78c22e89a53

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author Franz Glasner <fzglas.hg@dom66.de>
date Fri, 19 Sep 2025 18:52:43 +0200
parents b50eed0cc0ef
children
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1 #ifndef OT_LAYOUT_GPOS_SINGLEPOSFORMAT1_HH
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2 #define OT_LAYOUT_GPOS_SINGLEPOSFORMAT1_HH
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4 #include "Common.hh"
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5 #include "ValueFormat.hh"
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7 namespace OT {
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8 namespace Layout {
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9 namespace GPOS_impl {
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11 struct SinglePosFormat1
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12 {
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13 protected:
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14 HBUINT16 format; /* Format identifier--format = 1 */
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15 Offset16To<Coverage>
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16 coverage; /* Offset to Coverage table--from
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17 * beginning of subtable */
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18 ValueFormat valueFormat; /* Defines the types of data in the
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19 * ValueRecord */
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20 ValueRecord values; /* Defines positioning
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21 * value(s)--applied to all glyphs in
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22 * the Coverage table */
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23 public:
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24 DEFINE_SIZE_ARRAY (6, values);
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26 bool sanitize (hb_sanitize_context_t *c) const
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27 {
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28 TRACE_SANITIZE (this);
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29 return_trace (c->check_struct (this) &&
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30 coverage.sanitize (c, this) &&
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31 valueFormat.sanitize_value (c, this, values));
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32 }
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34 bool intersects (const hb_set_t *glyphs) const
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35 { return (this+coverage).intersects (glyphs); }
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37 void closure_lookups (hb_closure_lookups_context_t *c) const {}
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38 void collect_variation_indices (hb_collect_variation_indices_context_t *c) const
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39 {
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40 if (!valueFormat.has_device ()) return;
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42 hb_set_t intersection;
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43 (this+coverage).intersect_set (*c->glyph_set, intersection);
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44 if (!intersection) return;
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46 valueFormat.collect_variation_indices (c, this, values.as_array (valueFormat.get_len ()));
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47 }
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49 void collect_glyphs (hb_collect_glyphs_context_t *c) const
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50 { if (unlikely (!(this+coverage).collect_coverage (c->input))) return; }
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52 const Coverage &get_coverage () const { return this+coverage; }
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54 ValueFormat get_value_format () const { return valueFormat; }
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56 bool apply (hb_ot_apply_context_t *c) const
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57 {
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58 TRACE_APPLY (this);
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59 hb_buffer_t *buffer = c->buffer;
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60 unsigned int index = (this+coverage).get_coverage (buffer->cur().codepoint);
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61 if (likely (index == NOT_COVERED)) return_trace (false);
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63 if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ())
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64 {
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65 c->buffer->message (c->font,
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66 "positioning glyph at %d",
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67 c->buffer->idx);
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68 }
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70 valueFormat.apply_value (c, this, values, buffer->cur_pos());
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72 if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ())
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73 {
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74 c->buffer->message (c->font,
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75 "positioned glyph at %d",
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76 c->buffer->idx);
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77 }
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79 buffer->idx++;
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80 return_trace (true);
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81 }
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83 bool
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84 position_single (hb_font_t *font,
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85 hb_direction_t direction,
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86 hb_codepoint_t gid,
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87 hb_glyph_position_t &pos) const
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88 {
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89 unsigned int index = (this+coverage).get_coverage (gid);
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90 if (likely (index == NOT_COVERED)) return false;
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92 /* This is ugly... */
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93 hb_buffer_t buffer;
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94 buffer.props.direction = direction;
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95 OT::hb_ot_apply_context_t c (1, font, &buffer);
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97 valueFormat.apply_value (&c, this, values, pos);
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98 return true;
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99 }
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100
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101 template<typename Iterator,
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102 typename SrcLookup,
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103 hb_requires (hb_is_iterator (Iterator))>
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104 void serialize (hb_serialize_context_t *c,
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105 const SrcLookup *src,
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106 Iterator it,
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107 ValueFormat newFormat,
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108 const hb_hashmap_t<unsigned, hb_pair_t<unsigned, int>> *layout_variation_idx_delta_map)
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109 {
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110 if (unlikely (!c->extend_min (this))) return;
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111 if (unlikely (!c->check_assign (valueFormat,
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112 newFormat,
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113 HB_SERIALIZE_ERROR_INT_OVERFLOW))) return;
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114
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115 for (const hb_array_t<const Value>& _ : + it | hb_map (hb_second))
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116 {
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117 src->get_value_format ().copy_values (c, newFormat, src, &_, layout_variation_idx_delta_map);
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118 // Only serialize the first entry in the iterator, the rest are assumed to
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119 // be the same.
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120 break;
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121 }
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122
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123 auto glyphs =
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124 + it
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125 | hb_map_retains_sorting (hb_first)
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126 ;
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127
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128 coverage.serialize_serialize (c, glyphs);
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129 }
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130
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131 bool subset (hb_subset_context_t *c) const
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132 {
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133 TRACE_SUBSET (this);
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134 const hb_set_t &glyphset = *c->plan->glyphset_gsub ();
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135 const hb_map_t &glyph_map = *c->plan->glyph_map;
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136
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137 hb_set_t intersection;
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138 (this+coverage).intersect_set (glyphset, intersection);
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139
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140 auto it =
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141 + hb_iter (intersection)
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142 | hb_map_retains_sorting (glyph_map)
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143 | hb_zip (hb_repeat (values.as_array (valueFormat.get_len ())))
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144 ;
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145
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146 bool ret = bool (it);
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147 SinglePos_serialize (c->serializer, this, it, c->plan->layout_variation_idx_delta_map, c->plan->all_axes_pinned);
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148 return_trace (ret);
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149 }
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150 };
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151
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152 }
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153 }
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154 }
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155
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156 #endif /* OT_LAYOUT_GPOS_SINGLEPOSFORMAT1_HH */