Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/harfbuzz/src/hb-aat-layout-opbd-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 © 2019 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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25 #ifndef HB_AAT_LAYOUT_OPBD_TABLE_HH
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26 #define HB_AAT_LAYOUT_OPBD_TABLE_HH
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28 #include "hb-aat-layout-common.hh"
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29 #include "hb-open-type.hh"
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31 /*
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32 * opbd -- Optical Bounds
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33 * https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6opbd.html
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34 */
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35 #define HB_AAT_TAG_opbd HB_TAG('o','p','b','d')
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38 namespace AAT {
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39
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40 struct OpticalBounds
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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 FWORD leftSide;
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49 FWORD topSide;
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50 FWORD rightSide;
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51 FWORD bottomSide;
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52 public:
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53 DEFINE_SIZE_STATIC (8);
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54 };
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55
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56 struct opbdFormat0
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57 {
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58 bool get_bounds (hb_font_t *font, hb_codepoint_t glyph_id,
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59 hb_glyph_extents_t *extents, const void *base) const
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60 {
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61 const Offset16To<OpticalBounds> *bounds_offset = lookupTable.get_value (glyph_id, font->face->get_num_glyphs ());
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62 if (!bounds_offset) return false;
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63 const OpticalBounds &bounds = base+*bounds_offset;
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64
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65 if (extents)
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66 *extents = {
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67 font->em_scale_x (bounds.leftSide),
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68 font->em_scale_y (bounds.topSide),
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69 font->em_scale_x (bounds.rightSide),
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70 font->em_scale_y (bounds.bottomSide)
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71 };
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72 return true;
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73 }
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74
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75 bool sanitize (hb_sanitize_context_t *c, const void *base) const
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76 {
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77 TRACE_SANITIZE (this);
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78 return_trace (likely (c->check_struct (this) && lookupTable.sanitize (c, base)));
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79 }
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80
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81 protected:
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82 Lookup<Offset16To<OpticalBounds>>
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83 lookupTable; /* Lookup table associating glyphs with the four
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84 * int16 values for the left-side, top-side,
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85 * right-side, and bottom-side optical bounds. */
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86 public:
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87 DEFINE_SIZE_MIN (2);
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88 };
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89
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90 struct opbdFormat1
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91 {
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92 bool get_bounds (hb_font_t *font, hb_codepoint_t glyph_id,
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93 hb_glyph_extents_t *extents, const void *base) const
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94 {
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95 const Offset16To<OpticalBounds> *bounds_offset = lookupTable.get_value (glyph_id, font->face->get_num_glyphs ());
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96 if (!bounds_offset) return false;
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97 const OpticalBounds &bounds = base+*bounds_offset;
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98
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99 hb_position_t left = 0, top = 0, right = 0, bottom = 0, ignore;
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100 if (font->get_glyph_contour_point (glyph_id, bounds.leftSide, &left, &ignore) ||
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101 font->get_glyph_contour_point (glyph_id, bounds.topSide, &ignore, &top) ||
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102 font->get_glyph_contour_point (glyph_id, bounds.rightSide, &right, &ignore) ||
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103 font->get_glyph_contour_point (glyph_id, bounds.bottomSide, &ignore, &bottom))
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104 {
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105 if (extents)
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106 *extents = {left, top, right, bottom};
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107 return true;
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108 }
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109 return false;
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110 }
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111
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112 bool sanitize (hb_sanitize_context_t *c, const void *base) const
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113 {
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114 TRACE_SANITIZE (this);
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115 return_trace (likely (c->check_struct (this) && lookupTable.sanitize (c, base)));
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116 }
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117
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118 protected:
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119 Lookup<Offset16To<OpticalBounds>>
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120 lookupTable; /* Lookup table associating glyphs with the four
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121 * int16 values for the left-side, top-side,
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122 * right-side, and bottom-side optical bounds. */
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123 public:
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124 DEFINE_SIZE_MIN (2);
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125 };
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126
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127 struct opbd
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128 {
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129 static constexpr hb_tag_t tableTag = HB_AAT_TAG_opbd;
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130
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131 bool get_bounds (hb_font_t *font, hb_codepoint_t glyph_id,
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132 hb_glyph_extents_t *extents) const
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133 {
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134 switch (format)
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135 {
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136 case 0: return u.format0.get_bounds (font, glyph_id, extents, this);
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137 case 1: return u.format1.get_bounds (font, glyph_id, extents, this);
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138 default:return false;
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139 }
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140 }
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141
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142 bool sanitize (hb_sanitize_context_t *c) const
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143 {
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144 TRACE_SANITIZE (this);
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145 if (unlikely (!c->check_struct (this) || version.major != 1))
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146 return_trace (false);
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147
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148 switch (format)
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149 {
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150 case 0: return_trace (u.format0.sanitize (c, this));
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151 case 1: return_trace (u.format1.sanitize (c, this));
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152 default:return_trace (true);
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153 }
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154 }
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155
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156 protected:
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157 FixedVersion<>version; /* Version number of the optical bounds
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158 * table (0x00010000 for the current version). */
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159 HBUINT16 format; /* Format of the optical bounds table.
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160 * Format 0 indicates distance and Format 1 indicates
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161 * control point. */
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162 union {
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163 opbdFormat0 format0;
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164 opbdFormat1 format1;
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165 } u;
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166 public:
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167 DEFINE_SIZE_MIN (8);
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168 };
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169
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170 } /* namespace AAT */
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171
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172
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173 #endif /* HB_AAT_LAYOUT_OPBD_TABLE_HH */