Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/tesseract/src/ccstruct/mod128.cpp @ 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
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /**********************************************************************
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2 * File: mod128.cpp (Formerly dir128.c)
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3 * Description: Code to convert a DIR128 to an ICOORD.
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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 "mod128.h"
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21 namespace tesseract {
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23 static const TDimension idirtab[] = {
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24 1000, 0, 998, 49, 995, 98, 989, 146, 980, 195, 970, 242, 956, 290, 941,
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25 336, 923, 382, 903, 427, 881, 471, 857, 514, 831, 555, 803, 595, 773, 634,
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26 740, 671, 707, 707, 671, 740, 634, 773, 595, 803, 555, 831, 514, 857, 471,
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27 881, 427, 903, 382, 923, 336, 941, 290, 956, 242, 970, 195, 980, 146, 989,
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28 98, 995, 49, 998, 0, 1000, -49, 998, -98, 995, -146, 989, -195, 980, -242,
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29 970, -290, 956, -336, 941, -382, 923, -427, 903, -471, 881, -514, 857, -555, 831,
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30 -595, 803, -634, 773, -671, 740, -707, 707, -740, 671, -773, 634, -803, 595, -831,
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31 555, -857, 514, -881, 471, -903, 427, -923, 382, -941, 336, -956, 290, -970, 242,
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32 -980, 195, -989, 146, -995, 98, -998, 49, -1000, 0, -998, -49, -995, -98, -989,
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33 -146, -980, -195, -970, -242, -956, -290, -941, -336, -923, -382, -903, -427, -881, -471,
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34 -857, -514, -831, -555, -803, -595, -773, -634, -740, -671, -707, -707, -671, -740, -634,
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35 -773, -595, -803, -555, -831, -514, -857, -471, -881, -427, -903, -382, -923, -336, -941,
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36 -290, -956, -242, -970, -195, -980, -146, -989, -98, -995, -49, -998, 0, -1000, 49,
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37 -998, 98, -995, 146, -989, 195, -980, 242, -970, 290, -956, 336, -941, 382, -923,
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38 427, -903, 471, -881, 514, -857, 555, -831, 595, -803, 634, -773, 671, -740, 707,
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39 -707, 740, -671, 773, -634, 803, -595, 831, -555, 857, -514, 881, -471, 903, -427,
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40 923, -382, 941, -336, 956, -290, 970, -242, 980, -195, 989, -146, 995, -98, 998,
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41 -49};
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43 static const ICOORD *dirtab = reinterpret_cast<const ICOORD *>(idirtab);
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45 /**********************************************************************
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46 * DIR128::DIR128
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47 *
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48 * Quantize the direction of an FCOORD to make a DIR128.
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49 **********************************************************************/
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51 DIR128::DIR128( // from fcoord
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52 const FCOORD fc // vector to quantize
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53 ) {
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54 int high, low, current; // binary search
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55
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56 low = 0;
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57 if (fc.y() == 0) {
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58 if (fc.x() >= 0) {
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59 dir = 0;
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60 } else {
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61 dir = MODULUS / 2;
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62 }
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63 return;
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64 }
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65 high = MODULUS;
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66 do {
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67 current = (high + low) / 2;
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68 if (dirtab[current] * fc >= 0) {
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69 low = current;
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70 } else {
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71 high = current;
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72 }
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73 } while (high - low > 1);
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74 dir = low;
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75 }
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76
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77 } // namespace tesseract