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annotate mupdf-source/thirdparty/harfbuzz/src/hb-cff1-interp-cs.hh @ 32:72c1b70d4f5c

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author Franz Glasner <fzglas.hg@dom66.de>
date Sun, 21 Sep 2025 15:10:12 +0200
parents b50eed0cc0ef
children
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2
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1 /*
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2 * Copyright © 2018 Adobe 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 * Adobe Author(s): Michiharu Ariza
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25 */
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26 #ifndef HB_CFF1_INTERP_CS_HH
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27 #define HB_CFF1_INTERP_CS_HH
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29 #include "hb.hh"
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30 #include "hb-cff-interp-cs-common.hh"
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32 namespace CFF {
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33
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34 using namespace OT;
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36 typedef biased_subrs_t<CFF1Subrs> cff1_biased_subrs_t;
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37
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38 struct cff1_cs_interp_env_t : cs_interp_env_t<number_t, CFF1Subrs>
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39 {
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40 template <typename ACC>
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41 cff1_cs_interp_env_t (const hb_ubytes_t &str, ACC &acc, unsigned int fd)
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42 : SUPER (str, acc.globalSubrs, acc.privateDicts[fd].localSubrs)
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43 {
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44 processed_width = false;
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45 has_width = false;
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46 arg_start = 0;
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47 in_seac = false;
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48 }
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49
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50 void set_width (bool has_width_)
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51 {
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52 if (likely (!processed_width && (SUPER::argStack.get_count () > 0)))
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53 {
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54 if (has_width_)
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55 {
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56 width = SUPER::argStack[0];
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57 has_width = true;
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58 arg_start = 1;
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59 }
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60 }
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61 processed_width = true;
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62 }
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63
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64 void clear_args ()
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65 {
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66 arg_start = 0;
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67 SUPER::clear_args ();
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68 }
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69
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70 void set_in_seac (bool _in_seac) { in_seac = _in_seac; }
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71
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72 bool processed_width;
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73 bool has_width;
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74 unsigned int arg_start;
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75 number_t width;
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76 bool in_seac;
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77
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78 private:
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79 typedef cs_interp_env_t<number_t, CFF1Subrs> SUPER;
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80 };
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81
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82 template <typename OPSET, typename PARAM, typename PATH=path_procs_null_t<cff1_cs_interp_env_t, PARAM>>
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83 struct cff1_cs_opset_t : cs_opset_t<number_t, OPSET, cff1_cs_interp_env_t, PARAM, PATH>
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84 {
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85 /* PostScript-originated legacy opcodes (OpCode_add etc) are unsupported */
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86 /* Type 1-originated deprecated opcodes, seac behavior of endchar and dotsection are supported */
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87
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88 static void process_op (op_code_t op, cff1_cs_interp_env_t &env, PARAM& param)
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89 {
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90 switch (op) {
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91 case OpCode_dotsection:
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92 SUPER::flush_args_and_op (op, env, param);
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93 break;
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94
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95 case OpCode_endchar:
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96 OPSET::check_width (op, env, param);
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97 if (env.argStack.get_count () >= 4)
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98 {
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99 OPSET::process_seac (env, param);
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100 }
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101 OPSET::flush_args_and_op (op, env, param);
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102 env.set_endchar (true);
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103 break;
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104
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105 default:
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106 SUPER::process_op (op, env, param);
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107 }
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108 }
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109
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110 static void check_width (op_code_t op, cff1_cs_interp_env_t &env, PARAM& param)
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111 {
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112 if (!env.processed_width)
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113 {
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114 bool has_width = false;
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115 switch (op)
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116 {
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117 case OpCode_endchar:
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118 case OpCode_hstem:
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119 case OpCode_hstemhm:
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120 case OpCode_vstem:
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121 case OpCode_vstemhm:
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122 case OpCode_hintmask:
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123 case OpCode_cntrmask:
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124 has_width = ((env.argStack.get_count () & 1) != 0);
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125 break;
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126 case OpCode_hmoveto:
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127 case OpCode_vmoveto:
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128 has_width = (env.argStack.get_count () > 1);
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129 break;
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130 case OpCode_rmoveto:
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131 has_width = (env.argStack.get_count () > 2);
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132 break;
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133 default:
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134 return;
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135 }
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136 env.set_width (has_width);
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137 }
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138 }
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139
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140 static void process_seac (cff1_cs_interp_env_t &env, PARAM& param)
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141 {
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142 }
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143
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144 static void flush_args (cff1_cs_interp_env_t &env, PARAM& param)
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145 {
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146 SUPER::flush_args (env, param);
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147 env.clear_args (); /* pop off width */
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148 }
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149
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150 private:
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151 typedef cs_opset_t<number_t, OPSET, cff1_cs_interp_env_t, PARAM, PATH> SUPER;
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152 };
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153
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154 template <typename OPSET, typename PARAM>
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155 using cff1_cs_interpreter_t = cs_interpreter_t<cff1_cs_interp_env_t, OPSET, PARAM>;
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156
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157 } /* namespace CFF */
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158
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159 #endif /* HB_CFF1_INTERP_CS_HH */