Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/tesseract/src/ccstruct/boxread.h @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1 /**********************************************************************
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2 * File: boxread.h
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3 * Description: Read data from a box file.
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4 * Author: Ray Smith
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5 *
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6 * (C) Copyright 2007, Google Inc.
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7 ** Licensed under the Apache License, Version 2.0 (the "License");
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8 ** you may not use this file except in compliance with the License.
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9 ** You may obtain a copy of the License at
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10 ** http://www.apache.org/licenses/LICENSE-2.0
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11 ** Unless required by applicable law or agreed to in writing, software
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12 ** distributed under the License is distributed on an "AS IS" BASIS,
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13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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14 ** See the License for the specific language governing permissions and
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15 ** limitations under the License.
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16 *
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17 **********************************************************************/
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19 #ifndef TESSERACT_CCUTIL_BOXREAD_H_
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20 #define TESSERACT_CCUTIL_BOXREAD_H_
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22 #include <cstdio> // for FILE
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23 #include <string> // for std::string
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24 #include <vector> // for std::vector
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26 #include <tesseract/export.h> // for TESS_API
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28 namespace tesseract {
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30 class TBOX;
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32 // Size of buffer used to read a line from a box file.
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33 const int kBoxReadBufSize = 1024;
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35 // Open the boxfile based on the given image filename.
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36 // Returns nullptr if the box file cannot be opened.
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37 TESS_API
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38 FILE *OpenBoxFile(const char *filename);
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40 // Reads all boxes from the given filename.
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41 // Reads a specific target_page number if >= 0, or all pages otherwise.
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42 // Skips blanks if skip_blanks is true.
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43 // The UTF-8 label of the box is put in texts, and the full box definition as
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44 // a string is put in box_texts, with the corresponding page number in pages.
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45 // Each of the output vectors is optional (may be nullptr).
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46 // Returns false if no boxes are found.
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47 bool ReadAllBoxes(int target_page, bool skip_blanks, const char *filename, std::vector<TBOX> *boxes,
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48 std::vector<std::string> *texts, std::vector<std::string> *box_texts,
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49 std::vector<int> *pages);
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51 // Reads all boxes from the string. Otherwise, as ReadAllBoxes.
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52 // continue_on_failure allows reading to continue even if an invalid box is
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53 // encountered and will return true if it succeeds in reading some boxes.
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54 // It otherwise gives up and returns false on encountering an invalid box.
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55 TESS_API
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56 bool ReadMemBoxes(int target_page, bool skip_blanks, const char *box_data, bool continue_on_failure,
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57 std::vector<TBOX> *boxes, std::vector<std::string> *texts,
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58 std::vector<std::string> *box_texts, std::vector<int> *pages);
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60 // ReadNextBox factors out the code to interpret a line of a box
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61 // file so that applybox and unicharset_extractor interpret the same way.
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62 // This function returns the next valid box file utf8 string and coords
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63 // and returns true, or false on eof (and closes the file).
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64 // It ignores the utf8 file signature ByteOrderMark (U+FEFF=EF BB BF), checks
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65 // for valid utf-8 and allows space or tab between fields.
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66 // utf8_str is set with the unichar string, and bounding box with the box.
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67 // If there are page numbers in the file, it reads them all.
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68 TESS_API
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69 bool ReadNextBox(int *line_number, FILE *box_file, std::string &utf8_str, TBOX *bounding_box);
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70 // As ReadNextBox above, but get a specific page number. (0-based)
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71 // Use -1 to read any page number. Files without page number all
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72 // read as if they are page 0.
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73 TESS_API
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74 bool ReadNextBox(int target_page, int *line_number, FILE *box_file, std::string &utf8_str,
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75 TBOX *bounding_box);
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77 // Parses the given box file string into a page_number, utf8_str, and
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78 // bounding_box. Returns true on a successful parse.
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79 TESS_API
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80 bool ParseBoxFileStr(const char *boxfile_str, int *page_number, std::string &utf8_str,
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81 TBOX *bounding_box);
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83 // Creates a box file string from a unichar string, TBOX and page number.
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84 TESS_API
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85 void MakeBoxFileStr(const char *unichar_str, const TBOX &box, int page_num, std::string &box_str);
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87 } // namespace tesseract
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89 #endif // TESSERACT_CCUTIL_BOXREAD_H_