Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/harfbuzz/src/hb-ot-maxp-table.hh @ 22:d77477b4e151

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Let _int_rc() also handle (i.e. ignore) a local version suffix
author Franz Glasner <fzglas.hg@dom66.de>
date Fri, 19 Sep 2025 12:05:57 +0200
parents b50eed0cc0ef
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Copyright © 2011,2012 Google, Inc.
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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 * Google Author(s): Behdad Esfahbod
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25 */
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27 #ifndef HB_OT_MAXP_TABLE_HH
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28 #define HB_OT_MAXP_TABLE_HH
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30 #include "hb-open-type.hh"
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32 namespace OT {
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35 /*
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36 * maxp -- Maximum Profile
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37 * https://docs.microsoft.com/en-us/typography/opentype/spec/maxp
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38 */
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40 #define HB_OT_TAG_maxp HB_TAG('m','a','x','p')
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42 struct maxpV1Tail
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43 {
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44 bool sanitize (hb_sanitize_context_t *c) const
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45 {
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46 TRACE_SANITIZE (this);
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47 return_trace (c->check_struct (this));
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48 }
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49
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50 HBUINT16 maxPoints; /* Maximum points in a non-composite glyph. */
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51 HBUINT16 maxContours; /* Maximum contours in a non-composite glyph. */
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52 HBUINT16 maxCompositePoints; /* Maximum points in a composite glyph. */
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53 HBUINT16 maxCompositeContours; /* Maximum contours in a composite glyph. */
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54 HBUINT16 maxZones; /* 1 if instructions do not use the twilight zone (Z0),
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55 * or 2 if instructions do use Z0; should be set to 2 in
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56 * most cases. */
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57 HBUINT16 maxTwilightPoints; /* Maximum points used in Z0. */
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58 HBUINT16 maxStorage; /* Number of Storage Area locations. */
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59 HBUINT16 maxFunctionDefs; /* Number of FDEFs, equal to the highest function number + 1. */
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60 HBUINT16 maxInstructionDefs; /* Number of IDEFs. */
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61 HBUINT16 maxStackElements; /* Maximum stack depth. (This includes Font and CVT
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62 * Programs, as well as the instructions for each glyph.) */
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63 HBUINT16 maxSizeOfInstructions; /* Maximum byte count for glyph instructions. */
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64 HBUINT16 maxComponentElements; /* Maximum number of components referenced at
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65 * "top level" for any composite glyph. */
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66 HBUINT16 maxComponentDepth; /* Maximum levels of recursion; 1 for simple components. */
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67 public:
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68 DEFINE_SIZE_STATIC (26);
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69 };
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70
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71
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72 struct maxp
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73 {
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74 static constexpr hb_tag_t tableTag = HB_OT_TAG_maxp;
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76 unsigned int get_num_glyphs () const { return numGlyphs; }
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78 void set_num_glyphs (unsigned int count)
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79 {
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80 numGlyphs = count;
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81 }
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82
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83 bool sanitize (hb_sanitize_context_t *c) const
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84 {
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85 TRACE_SANITIZE (this);
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86 if (unlikely (!c->check_struct (this)))
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87 return_trace (false);
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88
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89 if (version.major == 1)
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90 {
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91 const maxpV1Tail &v1 = StructAfter<maxpV1Tail> (*this);
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92 return_trace (v1.sanitize (c));
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93 }
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94 return_trace (likely (version.major == 0 && version.minor == 0x5000u));
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95 }
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97 bool subset (hb_subset_context_t *c) const
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98 {
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99 TRACE_SUBSET (this);
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100 maxp *maxp_prime = c->serializer->embed (this);
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101 if (unlikely (!maxp_prime)) return_trace (false);
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102
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103 maxp_prime->numGlyphs = c->plan->num_output_glyphs ();
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104 if (maxp_prime->version.major == 1)
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105 {
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106 const maxpV1Tail *src_v1 = &StructAfter<maxpV1Tail> (*this);
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107 maxpV1Tail *dest_v1 = c->serializer->embed<maxpV1Tail> (src_v1);
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108 if (unlikely (!dest_v1)) return_trace (false);
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109
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110 if (c->plan->flags & HB_SUBSET_FLAGS_NO_HINTING)
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111 drop_hint_fields (dest_v1);
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112 }
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113
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114 return_trace (true);
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115 }
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116
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117 static void drop_hint_fields (maxpV1Tail* dest_v1)
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118 {
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119 dest_v1->maxZones = 1;
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120 dest_v1->maxTwilightPoints = 0;
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121 dest_v1->maxStorage = 0;
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122 dest_v1->maxFunctionDefs = 0;
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123 dest_v1->maxInstructionDefs = 0;
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124 dest_v1->maxStackElements = 0;
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125 dest_v1->maxSizeOfInstructions = 0;
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126 }
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127
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128 protected:
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129 FixedVersion<>version;/* Version of the maxp table (0.5 or 1.0),
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130 * 0x00005000u or 0x00010000u. */
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131 HBUINT16 numGlyphs;
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132 /* The number of glyphs in the font. */
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133 /*maxpV1Tail v1Tail[HB_VAR_ARRAY]; */
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134 public:
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135 DEFINE_SIZE_STATIC (6);
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136 };
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137
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138
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139 } /* namespace OT */
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140
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141
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142 #endif /* HB_OT_MAXP_TABLE_HH */