Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/harfbuzz/src/hb-aat-layout-bsln-table.hh @ 46:7ee69f120f19 default tip

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>>>>> tag v1.26.5+1 for changeset b74429b0f5c4
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 11 Oct 2025 17:17:30 +0200
parents b50eed0cc0ef
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2
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1 /*
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2 * Copyright © 2018 Ebrahim Byagowi
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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
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25 #ifndef HB_AAT_LAYOUT_BSLN_TABLE_HH
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26 #define HB_AAT_LAYOUT_BSLN_TABLE_HH
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28 #include "hb-aat-layout-common.hh"
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30 /*
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31 * bsln -- Baseline
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32 * https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6bsln.html
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33 */
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34 #define HB_AAT_TAG_bsln HB_TAG('b','s','l','n')
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37 namespace AAT {
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38
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39
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40 struct BaselineTableFormat0Part
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41 {
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42 bool sanitize (hb_sanitize_context_t *c) const
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43 {
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44 TRACE_SANITIZE (this);
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45 return_trace (c->check_struct (this));
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46 }
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47
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48 protected:
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49 // Roman, Ideographic centered, Ideographic low, Hanging and Math
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50 // are the default defined ones, but any other maybe accessed also.
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51 HBINT16 deltas[32]; /* These are the FUnit distance deltas from
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52 * the font's natural baseline to the other
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53 * baselines used in the font. */
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54 public:
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55 DEFINE_SIZE_STATIC (64);
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56 };
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57
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58 struct BaselineTableFormat1Part
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59 {
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60 bool sanitize (hb_sanitize_context_t *c) const
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61 {
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62 TRACE_SANITIZE (this);
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63 return_trace (likely (c->check_struct (this) &&
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64 lookupTable.sanitize (c)));
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65 }
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66
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67 protected:
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68 HBINT16 deltas[32]; /* ditto */
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69 Lookup<HBUINT16>
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70 lookupTable; /* Lookup table that maps glyphs to their
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71 * baseline values. */
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72 public:
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73 DEFINE_SIZE_MIN (66);
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74 };
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75
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76 struct BaselineTableFormat2Part
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77 {
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78 bool sanitize (hb_sanitize_context_t *c) const
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79 {
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80 TRACE_SANITIZE (this);
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81 return_trace (c->check_struct (this));
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82 }
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83
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84 protected:
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85 HBGlyphID16 stdGlyph; /* The specific glyph index number in this
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86 * font that is used to set the baseline values.
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87 * This is the standard glyph.
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88 * This glyph must contain a set of control points
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89 * (whose numbers are contained in the ctlPoints field)
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90 * that are used to determine baseline distances. */
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91 HBUINT16 ctlPoints[32]; /* Set of control point numbers,
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92 * associated with the standard glyph.
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93 * A value of 0xFFFF means there is no corresponding
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94 * control point in the standard glyph. */
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95 public:
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96 DEFINE_SIZE_STATIC (66);
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97 };
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98
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99 struct BaselineTableFormat3Part
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100 {
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101 bool sanitize (hb_sanitize_context_t *c) const
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102 {
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103 TRACE_SANITIZE (this);
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104 return_trace (likely (c->check_struct (this) && lookupTable.sanitize (c)));
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105 }
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106
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107 protected:
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108 HBGlyphID16 stdGlyph; /* ditto */
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109 HBUINT16 ctlPoints[32]; /* ditto */
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110 Lookup<HBUINT16>
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111 lookupTable; /* Lookup table that maps glyphs to their
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112 * baseline values. */
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113 public:
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114 DEFINE_SIZE_MIN (68);
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115 };
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116
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117 struct bsln
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118 {
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119 static constexpr hb_tag_t tableTag = HB_AAT_TAG_bsln;
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120
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121 bool sanitize (hb_sanitize_context_t *c) const
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122 {
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123 TRACE_SANITIZE (this);
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124 if (unlikely (!(c->check_struct (this) && defaultBaseline < 32)))
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125 return_trace (false);
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126
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127 switch (format)
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128 {
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129 case 0: return_trace (parts.format0.sanitize (c));
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130 case 1: return_trace (parts.format1.sanitize (c));
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131 case 2: return_trace (parts.format2.sanitize (c));
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132 case 3: return_trace (parts.format3.sanitize (c));
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133 default:return_trace (true);
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134 }
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135 }
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136
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137 protected:
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138 FixedVersion<>version; /* Version number of the Baseline table. */
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139 HBUINT16 format; /* Format of the baseline table. Only one baseline
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140 * format may be selected for the font. */
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141 HBUINT16 defaultBaseline;/* Default baseline value for all glyphs.
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142 * This value can be from 0 through 31. */
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143 union {
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144 // Distance-Based Formats
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145 BaselineTableFormat0Part format0;
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146 BaselineTableFormat1Part format1;
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147 // Control Point-based Formats
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148 BaselineTableFormat2Part format2;
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149 BaselineTableFormat3Part format3;
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150 } parts;
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151 public:
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152 DEFINE_SIZE_MIN (8);
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153 };
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154
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155 } /* namespace AAT */
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156
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157
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158 #endif /* HB_AAT_LAYOUT_BSLN_TABLE_HH */