Mercurial > hgrepos > Python2 > PyMuPDF

comparison mupdf-source/thirdparty/tesseract/src/ccstruct/mod128.cpp @ 2:b50eed0cc0ef upstream

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
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
parents
children
comparison
equal deleted inserted replaced
1:1d09e1dec1d9 2:b50eed0cc0ef
1 /**********************************************************************
2 * File: mod128.cpp (Formerly dir128.c)
3 * Description: Code to convert a DIR128 to an ICOORD.
4 * Author: Ray Smith
5 *
6 * (C) Copyright 1991, Hewlett-Packard Ltd.
7 ** Licensed under the Apache License, Version 2.0 (the "License");
8 ** you may not use this file except in compliance with the License.
9 ** You may obtain a copy of the License at
10 ** http://www.apache.org/licenses/LICENSE-2.0
11 ** Unless required by applicable law or agreed to in writing, software
12 ** distributed under the License is distributed on an "AS IS" BASIS,
13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 ** See the License for the specific language governing permissions and
15 ** limitations under the License.
16 *
17 **********************************************************************/
18
19 #include "mod128.h"
20
21 namespace tesseract {
22
23 static const TDimension idirtab[] = {
24 1000, 0, 998, 49, 995, 98, 989, 146, 980, 195, 970, 242, 956, 290, 941,
25 336, 923, 382, 903, 427, 881, 471, 857, 514, 831, 555, 803, 595, 773, 634,
26 740, 671, 707, 707, 671, 740, 634, 773, 595, 803, 555, 831, 514, 857, 471,
27 881, 427, 903, 382, 923, 336, 941, 290, 956, 242, 970, 195, 980, 146, 989,
28 98, 995, 49, 998, 0, 1000, -49, 998, -98, 995, -146, 989, -195, 980, -242,
29 970, -290, 956, -336, 941, -382, 923, -427, 903, -471, 881, -514, 857, -555, 831,
30 -595, 803, -634, 773, -671, 740, -707, 707, -740, 671, -773, 634, -803, 595, -831,
31 555, -857, 514, -881, 471, -903, 427, -923, 382, -941, 336, -956, 290, -970, 242,
32 -980, 195, -989, 146, -995, 98, -998, 49, -1000, 0, -998, -49, -995, -98, -989,
33 -146, -980, -195, -970, -242, -956, -290, -941, -336, -923, -382, -903, -427, -881, -471,
34 -857, -514, -831, -555, -803, -595, -773, -634, -740, -671, -707, -707, -671, -740, -634,
35 -773, -595, -803, -555, -831, -514, -857, -471, -881, -427, -903, -382, -923, -336, -941,
36 -290, -956, -242, -970, -195, -980, -146, -989, -98, -995, -49, -998, 0, -1000, 49,
37 -998, 98, -995, 146, -989, 195, -980, 242, -970, 290, -956, 336, -941, 382, -923,
38 427, -903, 471, -881, 514, -857, 555, -831, 595, -803, 634, -773, 671, -740, 707,
39 -707, 740, -671, 773, -634, 803, -595, 831, -555, 857, -514, 881, -471, 903, -427,
40 923, -382, 941, -336, 956, -290, 970, -242, 980, -195, 989, -146, 995, -98, 998,
41 -49};
42
43 static const ICOORD *dirtab = reinterpret_cast<const ICOORD *>(idirtab);
44
45 /**********************************************************************
46 * DIR128::DIR128
47 *
48 * Quantize the direction of an FCOORD to make a DIR128.
49 **********************************************************************/
50
51 DIR128::DIR128( // from fcoord
52 const FCOORD fc // vector to quantize
53 ) {
54 int high, low, current; // binary search
55
56 low = 0;
57 if (fc.y() == 0) {
58 if (fc.x() >= 0) {
59 dir = 0;
60 } else {
61 dir = MODULUS / 2;
62 }
63 return;
64 }
65 high = MODULUS;
66 do {
67 current = (high + low) / 2;
68 if (dirtab[current] * fc >= 0) {
69 low = current;
70 } else {
71 high = current;
72 }
73 } while (high - low > 1);
74 dir = low;
75 }
76
77 } // namespace tesseract