Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/tesseract/src/textord/workingpartset.h @ 21:2f43e400f144

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Provide an "all" target to build both the sdist and the wheel
author Franz Glasner <fzglas.hg@dom66.de>
date Fri, 19 Sep 2025 10:28:53 +0200
parents b50eed0cc0ef
children
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1 ///////////////////////////////////////////////////////////////////////
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2 // File: workingpartset.h
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3 // Description: Class to hold a working set of partitions of the page
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4 // during construction of text/image regions.
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5 // Author: Ray Smith
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6 // Created: Tue Ocr 28 17:21:01 PDT 2008
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7 //
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8 // (C) Copyright 2008, Google Inc.
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9 // Licensed under the Apache License, Version 2.0 (the "License");
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10 // you may not use this file except in compliance with the License.
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11 // You may obtain a copy of the License at
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12 // http://www.apache.org/licenses/LICENSE-2.0
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13 // Unless required by applicable law or agreed to in writing, software
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14 // distributed under the License is distributed on an "AS IS" BASIS,
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15 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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16 // See the License for the specific language governing permissions and
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17 // limitations under the License.
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18 //
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19 ///////////////////////////////////////////////////////////////////////
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21 #ifndef TESSERACT_TEXTORD_WORKINGPARSET_H_
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22 #define TESSERACT_TEXTORD_WORKINGPARSET_H_
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24 #include "blobbox.h" // For TO_BLOCK_LIST and BLOCK_LIST.
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25 #include "colpartition.h" // For ColPartition_LIST.
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27 namespace tesseract {
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29 // WorkingPartSet holds a working set of ColPartitions during transformation
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30 // from the grid-based storage to regions in logical reading order, and is
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31 // therefore only used during construction of the regions.
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32 class WorkingPartSet : public ELIST_LINK {
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33 public:
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34 explicit WorkingPartSet(ColPartition *column)
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35 : column_(column), latest_part_(nullptr), part_it_(&part_set_) {}
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37 // Simple accessors.
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38 ColPartition *column() const {
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39 return column_;
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40 }
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41 void set_column(ColPartition *col) {
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42 column_ = col;
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43 }
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45 // Add the partition to this WorkingPartSet. Partitions are generally
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46 // stored in the order in which they are received, but if the partition
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47 // has a SingletonPartner, make sure that it stays with its partner.
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48 void AddPartition(ColPartition *part);
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49
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50 // Make blocks out of any partitions in this WorkingPartSet, and append
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51 // them to the end of the blocks list. bleft, tright and resolution give
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52 // the bounds and resolution of the source image, so that blocks can be
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53 // made to fit in the bounds.
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54 // All ColPartitions go in the used_parts list, as they need to be kept
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55 // around, but are no longer needed.
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56 void ExtractCompletedBlocks(const ICOORD &bleft, const ICOORD &tright, int resolution,
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57 ColPartition_LIST *used_parts, BLOCK_LIST *blocks,
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58 TO_BLOCK_LIST *to_blocks);
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59
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60 // Insert the given blocks at the front of the completed_blocks_ list so
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61 // they can be kept in the correct reading order.
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62 void InsertCompletedBlocks(BLOCK_LIST *blocks, TO_BLOCK_LIST *to_blocks);
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64 private:
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65 // Convert the part_set_ into blocks, starting a new block at a break
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66 // in partnerships, or a change in linespacing (for text).
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67 void MakeBlocks(const ICOORD &bleft, const ICOORD &tright, int resolution,
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68 ColPartition_LIST *used_parts);
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69
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70 // The column that this working set applies to. Used by the caller.
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71 ColPartition *column_;
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72 // The most recently added partition.
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73 ColPartition *latest_part_;
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74 // All the partitions in the block that is currently under construction.
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75 ColPartition_LIST part_set_;
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76 // Iteratorn on part_set_ pointing to the most recent addition.
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77 ColPartition_IT part_it_;
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78 // The blocks that have been made so far and belong before the current block.
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79 BLOCK_LIST completed_blocks_;
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80 TO_BLOCK_LIST to_blocks_;
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81 };
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82
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83 ELISTIZEH(WorkingPartSet)
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84
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85 } // namespace tesseract.
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86
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87 #endif // TESSERACT_TEXTORD_WORKINGPARSET_H_