Mercurial > hgrepos > Python2 > PyMuPDF
annotate mupdf-source/thirdparty/harfbuzz/src/graph/classdef-graph.hh @ 32:72c1b70d4f5c
Also apply -Werror=implicit-function-declaration
| author | Franz Glasner <fzglas.hg@dom66.de> |
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| date | Sun, 21 Sep 2025 15:10:12 +0200 |
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| rev | line source |
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1 /* |
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2 * Copyright © 2022 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): Garret Rieger |
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25 */ |
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26 |
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27 #include "graph.hh" |
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28 #include "../hb-ot-layout-common.hh" |
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29 |
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30 #ifndef GRAPH_CLASSDEF_GRAPH_HH |
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31 #define GRAPH_CLASSDEF_GRAPH_HH |
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32 |
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33 namespace graph { |
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34 |
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35 struct ClassDefFormat1 : public OT::ClassDefFormat1_3<SmallTypes> |
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36 { |
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37 bool sanitize (graph_t::vertex_t& vertex) const |
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38 { |
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39 int64_t vertex_len = vertex.obj.tail - vertex.obj.head; |
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40 constexpr unsigned min_size = OT::ClassDefFormat1_3<SmallTypes>::min_size; |
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41 if (vertex_len < min_size) return false; |
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42 return vertex_len >= min_size + classValue.get_size () - classValue.len.get_size (); |
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43 } |
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44 }; |
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45 |
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46 struct ClassDefFormat2 : public OT::ClassDefFormat2_4<SmallTypes> |
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47 { |
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48 bool sanitize (graph_t::vertex_t& vertex) const |
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49 { |
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50 int64_t vertex_len = vertex.obj.tail - vertex.obj.head; |
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51 constexpr unsigned min_size = OT::ClassDefFormat2_4<SmallTypes>::min_size; |
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52 if (vertex_len < min_size) return false; |
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53 return vertex_len >= min_size + rangeRecord.get_size () - rangeRecord.len.get_size (); |
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54 } |
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55 }; |
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56 |
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57 struct ClassDef : public OT::ClassDef |
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58 { |
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59 template<typename It> |
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60 static bool add_class_def (gsubgpos_graph_context_t& c, |
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61 unsigned parent_id, |
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62 unsigned link_position, |
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63 It glyph_and_class, |
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64 unsigned max_size) |
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65 { |
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66 unsigned class_def_prime_id = c.graph.new_node (nullptr, nullptr); |
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67 auto& class_def_prime_vertex = c.graph.vertices_[class_def_prime_id]; |
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68 if (!make_class_def (c, glyph_and_class, class_def_prime_id, max_size)) |
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69 return false; |
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70 |
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71 auto* class_def_link = c.graph.vertices_[parent_id].obj.real_links.push (); |
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72 class_def_link->width = SmallTypes::size; |
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73 class_def_link->objidx = class_def_prime_id; |
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74 class_def_link->position = link_position; |
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75 class_def_prime_vertex.parents.push (parent_id); |
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76 |
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77 return true; |
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78 } |
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79 |
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80 template<typename It> |
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81 static bool make_class_def (gsubgpos_graph_context_t& c, |
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82 It glyph_and_class, |
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83 unsigned dest_obj, |
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84 unsigned max_size) |
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85 { |
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86 char* buffer = (char*) hb_calloc (1, max_size); |
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parents:
diff
changeset
|
87 hb_serialize_context_t serializer (buffer, max_size); |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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changeset
|
88 OT::ClassDef_serialize (&serializer, glyph_and_class); |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
89 serializer.end_serialize (); |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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|
90 if (serializer.in_error ()) |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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|
91 { |
|
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parents:
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|
92 hb_free (buffer); |
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|
93 return false; |
|
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|
94 } |
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parents:
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|
95 |
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parents:
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|
96 hb_bytes_t class_def_copy = serializer.copy_bytes (); |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
97 c.add_buffer ((char *) class_def_copy.arrayZ); // Give ownership to the context, it will cleanup the buffer. |
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parents:
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|
98 |
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parents:
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|
99 auto& obj = c.graph.vertices_[dest_obj].obj; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
100 obj.head = (char *) class_def_copy.arrayZ; |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
101 obj.tail = obj.head + class_def_copy.length; |
|
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102 |
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parents:
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|
103 hb_free (buffer); |
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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|
104 return true; |
|
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parents:
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|
105 } |
|
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parents:
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|
106 |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
107 bool sanitize (graph_t::vertex_t& vertex) const |
|
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parents:
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|
108 { |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
109 int64_t vertex_len = vertex.obj.tail - vertex.obj.head; |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
110 if (vertex_len < OT::ClassDef::min_size) return false; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
111 switch (u.format) |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
112 { |
|
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parents:
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|
113 case 1: return ((ClassDefFormat1*)this)->sanitize (vertex); |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
114 case 2: return ((ClassDefFormat2*)this)->sanitize (vertex); |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
115 #ifndef HB_NO_BEYOND_64K |
|
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|
116 // Not currently supported |
|
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parents:
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|
117 case 3: |
|
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parents:
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|
118 case 4: |
|
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parents:
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|
119 #endif |
|
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|
120 default: return false; |
|
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parents:
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|
121 } |
|
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parents:
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|
122 } |
|
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parents:
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|
123 }; |
|
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124 |
|
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parents:
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|
125 |
|
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parents:
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|
126 struct class_def_size_estimator_t |
|
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|
127 { |
|
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parents:
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|
128 template<typename It> |
|
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parents:
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129 class_def_size_estimator_t (It glyph_and_class) |
|
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130 : gids_consecutive (true), num_ranges_per_class (), glyphs_per_class () |
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parents:
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|
131 { |
|
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parents:
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|
132 unsigned last_gid = (unsigned) -1; |
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|
133 for (auto p : + glyph_and_class) |
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134 { |
|
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parents:
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|
135 unsigned gid = p.first; |
|
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parents:
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|
136 unsigned klass = p.second; |
|
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parents:
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|
137 |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
138 if (last_gid != (unsigned) -1 && gid != last_gid + 1) |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
139 gids_consecutive = false; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
140 last_gid = gid; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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|
141 |
|
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parents:
diff
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|
142 hb_set_t* glyphs; |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
143 if (glyphs_per_class.has (klass, &glyphs) && glyphs) { |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
144 glyphs->add (gid); |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
145 continue; |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
146 } |
|
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parents:
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|
147 |
|
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parents:
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|
148 hb_set_t new_glyphs; |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
149 new_glyphs.add (gid); |
|
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parents:
diff
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|
150 glyphs_per_class.set (klass, std::move (new_glyphs)); |
|
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parents:
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|
151 } |
|
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parents:
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|
152 |
|
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parents:
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|
153 if (in_error ()) return; |
|
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parents:
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|
154 |
|
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parents:
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|
155 for (unsigned klass : glyphs_per_class.keys ()) |
|
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parents:
diff
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|
156 { |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
157 if (!klass) continue; // class 0 doesn't get encoded. |
|
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parents:
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|
158 |
|
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parents:
diff
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|
159 const hb_set_t& glyphs = glyphs_per_class.get (klass); |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
160 hb_codepoint_t start = HB_SET_VALUE_INVALID; |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
161 hb_codepoint_t end = HB_SET_VALUE_INVALID; |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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|
162 |
|
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parents:
diff
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|
163 unsigned count = 0; |
|
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parents:
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|
164 while (glyphs.next_range (&start, &end)) |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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|
165 count++; |
|
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parents:
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|
166 |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
167 num_ranges_per_class.set (klass, count); |
|
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parents:
diff
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|
168 } |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff
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|
169 } |
|
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parents:
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170 |
|
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parents:
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|
171 // Incremental increase in the Coverage and ClassDef table size |
|
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parents:
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172 // (worst case) if all glyphs associated with 'klass' were added. |
|
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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|
173 unsigned incremental_coverage_size (unsigned klass) const |
|
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parents:
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|
174 { |
|
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parents:
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|
175 // Coverage takes 2 bytes per glyph worst case, |
|
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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff
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176 return 2 * glyphs_per_class.get (klass).get_population (); |
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177 } |
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178 |
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179 // Incremental increase in the Coverage and ClassDef table size |
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180 // (worst case) if all glyphs associated with 'klass' were added. |
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181 unsigned incremental_class_def_size (unsigned klass) const |
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182 { |
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183 // ClassDef takes 6 bytes per range |
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184 unsigned class_def_2_size = 6 * num_ranges_per_class.get (klass); |
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185 if (gids_consecutive) |
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186 { |
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187 // ClassDef1 takes 2 bytes per glyph, but only can be used |
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188 // when gids are consecutive. |
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189 return hb_min (2 * glyphs_per_class.get (klass).get_population (), class_def_2_size); |
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190 } |
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191 |
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192 return class_def_2_size; |
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193 } |
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194 |
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195 bool in_error () |
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196 { |
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197 if (num_ranges_per_class.in_error ()) return true; |
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198 if (glyphs_per_class.in_error ()) return true; |
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199 |
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200 for (const hb_set_t& s : glyphs_per_class.values ()) |
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201 { |
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202 if (s.in_error ()) return true; |
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203 } |
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204 return false; |
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205 } |
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206 |
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207 private: |
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208 bool gids_consecutive; |
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209 hb_hashmap_t<unsigned, unsigned> num_ranges_per_class; |
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210 hb_hashmap_t<unsigned, hb_set_t> glyphs_per_class; |
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211 }; |
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212 |
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213 |
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214 } |
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215 |
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216 #endif // GRAPH_CLASSDEF_GRAPH_HH |
