Mercurial > hgrepos > Python2 > PyMuPDF
annotate mupdf-source/thirdparty/harfbuzz/src/hb-ot-shaper-myanmar-machine.rl @ 46:7ee69f120f19 default tip
>>>>> tag v1.26.5+1 for changeset b74429b0f5c4
| author | Franz Glasner <fzglas.hg@dom66.de> |
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| date | Sat, 11 Oct 2025 17:17:30 +0200 |
| parents | b50eed0cc0ef |
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| rev | line source |
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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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26 |
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27 #ifndef HB_OT_SHAPER_MYANMAR_MACHINE_HH |
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28 #define HB_OT_SHAPER_MYANMAR_MACHINE_HH |
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29 |
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30 #include "hb.hh" |
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31 |
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32 #include "hb-ot-layout.hh" |
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33 #include "hb-ot-shaper-indic.hh" |
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34 |
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35 /* buffer var allocations */ |
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36 #define myanmar_category() ot_shaper_var_u8_category() /* myanmar_category_t */ |
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37 #define myanmar_position() ot_shaper_var_u8_auxiliary() /* myanmar_position_t */ |
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38 |
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39 using myanmar_category_t = unsigned; |
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40 using myanmar_position_t = ot_position_t; |
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41 |
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42 #define M_Cat(Cat) myanmar_syllable_machine_ex_##Cat |
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43 |
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44 enum myanmar_syllable_type_t { |
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45 myanmar_consonant_syllable, |
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46 myanmar_broken_cluster, |
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47 myanmar_non_myanmar_cluster, |
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48 }; |
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49 |
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50 %%{ |
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51 machine myanmar_syllable_machine; |
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52 alphtype unsigned char; |
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53 write exports; |
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54 write data; |
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55 }%% |
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56 |
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57 %%{ |
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58 |
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59 |
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60 # Spec category D is folded into GB; D0 is not implemented by Uniscribe and as such folded into D |
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61 # Spec category P is folded into GB |
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62 |
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63 export C = 1; |
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64 export IV = 2; |
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65 export DB = 3; # Dot below = OT_N |
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66 export H = 4; |
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67 export ZWNJ = 5; |
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68 export ZWJ = 6; |
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69 export SM = 8; # Visarga and Shan tones |
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70 export GB = 10; # = OT_PLACEHOLDER |
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71 export DOTTEDCIRCLE = 11; |
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72 export A = 9; |
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73 export Ra = 15; |
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74 export CS = 18; |
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75 |
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76 export VAbv = 20; |
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77 export VBlw = 21; |
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78 export VPre = 22; |
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79 export VPst = 23; |
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80 |
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81 # 32+ are for Myanmar-specific values |
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82 export As = 32; # Asat |
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83 export MH = 35; # Medial Ha |
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84 export MR = 36; # Medial Ra |
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85 export MW = 37; # Medial Wa, Shan Wa |
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86 export MY = 38; # Medial Ya, Mon Na, Mon Ma |
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87 export PT = 39; # Pwo and other tones |
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88 export VS = 40; # Variation selectors |
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89 export ML = 41; # Medial Mon La |
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90 |
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91 |
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92 j = ZWJ|ZWNJ; # Joiners |
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93 k = (Ra As H); # Kinzi |
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94 |
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95 c = C|Ra; # is_consonant |
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96 |
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97 medial_group = MY? As? MR? ((MW MH? ML? | MH ML? | ML) As?)?; |
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98 main_vowel_group = (VPre.VS?)* VAbv* VBlw* A* (DB As?)?; |
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99 post_vowel_group = VPst MH? ML? As* VAbv* A* (DB As?)?; |
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100 pwo_tone_group = PT A* DB? As?; |
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101 |
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102 complex_syllable_tail = As* medial_group main_vowel_group post_vowel_group* pwo_tone_group* SM* j?; |
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103 syllable_tail = (H (c|IV).VS?)* (H | complex_syllable_tail); |
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104 |
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105 consonant_syllable = (k|CS)? (c|IV|GB|DOTTEDCIRCLE).VS? syllable_tail; |
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106 broken_cluster = k? VS? syllable_tail; |
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107 other = any; |
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108 |
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109 main := |* |
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110 consonant_syllable => { found_syllable (myanmar_consonant_syllable); }; |
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111 j => { found_syllable (myanmar_non_myanmar_cluster); }; |
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112 broken_cluster => { found_syllable (myanmar_broken_cluster); buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_BROKEN_SYLLABLE; }; |
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113 other => { found_syllable (myanmar_non_myanmar_cluster); }; |
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114 *|; |
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115 |
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116 |
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117 }%% |
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118 |
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119 #define found_syllable(syllable_type) \ |
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120 HB_STMT_START { \ |
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121 if (0) fprintf (stderr, "syllable %d..%d %s\n", ts, te, #syllable_type); \ |
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122 for (unsigned int i = ts; i < te; i++) \ |
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123 info[i].syllable() = (syllable_serial << 4) | syllable_type; \ |
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124 syllable_serial++; \ |
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125 if (syllable_serial == 16) syllable_serial = 1; \ |
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126 } HB_STMT_END |
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127 |
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128 inline void |
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129 find_syllables_myanmar (hb_buffer_t *buffer) |
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130 { |
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131 unsigned int p, pe, eof, ts, te, act HB_UNUSED; |
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132 int cs; |
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133 hb_glyph_info_t *info = buffer->info; |
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134 %%{ |
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135 write init; |
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136 getkey info[p].myanmar_category(); |
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137 }%% |
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138 |
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139 p = 0; |
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140 pe = eof = buffer->len; |
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141 |
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142 unsigned int syllable_serial = 1; |
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143 %%{ |
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144 write exec; |
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145 }%% |
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146 } |
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147 |
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148 #undef found_syllable |
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149 |
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150 #endif /* HB_OT_SHAPER_MYANMAR_MACHINE_HH */ |
