Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/tesseract/src/ccstruct/blread.cpp @ 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: blread.cpp (Formerly pdread.c)
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3 * Description: Friend function of BLOCK to read the uscan pd file.
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4 * Author: Ray Smith
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5 *
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6 * (C) Copyright 1991, Hewlett-Packard Ltd.
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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 #include "blread.h"
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21 #include "ocrblock.h" // for BLOCK_IT, BLOCK, BLOCK_LIST (ptr only)
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22 #include "scanutils.h" // for tfscanf
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24 #include <cstdio> // for fclose, fopen, FILE
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26 namespace tesseract {
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28 #define UNLV_EXT ".uzn" // unlv zone file
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30 /**********************************************************************
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31 * read_unlv_file
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32 *
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33 * Read a whole unlv zone file to make a list of blocks.
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34 **********************************************************************/
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36 bool read_unlv_file( // print list of sides
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37 std::string &name, // basename of file
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38 int32_t xsize, // image size
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39 int32_t ysize, // image size
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40 BLOCK_LIST *blocks // output list
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41 ) {
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42 FILE *pdfp; // file pointer
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43 BLOCK *block; // current block
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44 int x; // current top-down coords
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45 int y;
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46 int width; // of current block
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47 int height;
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48 BLOCK_IT block_it = blocks; // block iterator
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50 name += UNLV_EXT; // add extension
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51 if ((pdfp = fopen(name.c_str(), "rb")) == nullptr) {
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52 return false; // didn't read one
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53 } else {
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54 while (tfscanf(pdfp, "%d %d %d %d %*s", &x, &y, &width, &height) >= 4) {
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55 // make rect block
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56 block = new BLOCK(name.c_str(), true, 0, 0, static_cast<int16_t>(x),
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57 static_cast<int16_t>(ysize - y - height), static_cast<int16_t>(x + width),
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58 static_cast<int16_t>(ysize - y));
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59 // on end of list
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60 block_it.add_to_end(block);
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61 }
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62 fclose(pdfp);
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63 }
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64 tprintf("UZN file %s loaded.\n", name.c_str());
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65 return true;
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66 }
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67
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68 void FullPageBlock(int width, int height, BLOCK_LIST *blocks) {
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69 BLOCK_IT block_it(blocks);
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70 auto *block = new BLOCK("", true, 0, 0, 0, 0, width, height);
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71 block_it.add_to_end(block);
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72 }
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74 } // namespace tesseract