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comparison mupdf-source/thirdparty/zxing-cpp/core/src/BinaryBitmap.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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1:1d09e1dec1d9 2:b50eed0cc0ef
1 /*
2 * Copyright 2016 Nu-book Inc.
3 * Copyright 2016 ZXing authors
4 * Copyright 2021 Axel Waggershauser
5 */
6 // SPDX-License-Identifier: Apache-2.0
7
8 #pragma once
9
10 #include "ImageView.h"
11
12 #include <cstdint>
13 #include <memory>
14 #include <vector>
15
16 namespace ZXing {
17
18 class BitMatrix;
19
20 using PatternRow = std::vector<uint16_t>;
21
22 /**
23 * This class is the core bitmap class used by ZXing to represent 1 bit data. Reader objects
24 * accept a BinaryBitmap and attempt to decode it.
25 */
26 class BinaryBitmap
27 {
28 struct Cache;
29 std::unique_ptr<Cache> _cache;
30 bool _inverted = false;
31 bool _closed = false;
32
33 protected:
34 const ImageView _buffer;
35
36 /**
37 * Converts a 2D array of luminance data to 1 bit (true means black).
38 *
39 * @return The 2D array of bits for the image, nullptr on error.
40 */
41 virtual std::shared_ptr<const BitMatrix> getBlackMatrix() const = 0;
42
43 BitMatrix binarize(const uint8_t threshold) const;
44
45 public:
46 BinaryBitmap(const ImageView& buffer);
47 virtual ~BinaryBitmap();
48
49 int width() const { return _buffer.width(); }
50 int height() const { return _buffer.height(); }
51
52 /**
53 * Converts one row of luminance data to a vector of ints denoting the widths of the bars and spaces.
54 */
55 virtual bool getPatternRow(int row, int rotation, PatternRow& res) const = 0;
56
57 const BitMatrix* getBitMatrix() const;
58
59 void invert();
60 bool inverted() const { return _inverted; }
61
62 void close();
63 bool closed() const { return _closed; }
64 };
65
66 } // ZXing