Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/zxing-cpp/core/src/BitMatrix.h @ 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
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1 /*
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2 * Copyright 2016 Nu-book Inc.
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3 * Copyright 2016 ZXing authors
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4 * Copyright 2022 Axel Waggershauser
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5 */
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6 // SPDX-License-Identifier: Apache-2.0
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8 #pragma once
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10 #include "Matrix.h"
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11 #include "Point.h"
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12 #include "Range.h"
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14 #include <cstdint>
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15 #include <stdexcept>
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16 #include <vector>
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18 namespace ZXing {
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20 class BitArray;
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21 class ByteMatrix;
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23 /**
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24 * @brief A simple, fast 2D array of bits.
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25 */
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26 class BitMatrix
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27 {
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28 int _width = 0;
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29 int _height = 0;
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30 using data_t = uint8_t;
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32 std::vector<data_t> _bits;
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33 // There is nothing wrong to support this but disable to make it explicit since we may copy something very big here.
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34 // Use copy() below.
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35 BitMatrix(const BitMatrix&) = default;
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36 BitMatrix& operator=(const BitMatrix&) = delete;
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38 const data_t& get(int i) const
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39 {
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40 #if 1
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41 return _bits.at(i);
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42 #else
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43 return _bits[i];
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44 #endif
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45 }
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47 data_t& get(int i) { return const_cast<data_t&>(static_cast<const BitMatrix*>(this)->get(i)); }
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49 bool getTopLeftOnBit(int &left, int& top) const;
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50 bool getBottomRightOnBit(int &right, int& bottom) const;
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52 public:
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53 static constexpr data_t SET_V = 0xff; // allows playing with SIMD binarization
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54 static constexpr data_t UNSET_V = 0;
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55 static_assert(bool(SET_V) && !bool(UNSET_V), "SET_V needs to evaluate to true, UNSET_V to false, see iterator usage");
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57 BitMatrix() = default;
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59 #if defined(__llvm__) || (defined(__GNUC__) && (__GNUC__ > 7))
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60 __attribute__((no_sanitize("signed-integer-overflow")))
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61 #endif
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62 BitMatrix(int width, int height) : _width(width), _height(height), _bits(width * height, UNSET_V)
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63 {
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64 if (width != 0 && Size(_bits) / width != height)
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65 throw std::invalid_argument("Invalid size: width * height is too big");
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66 }
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68 explicit BitMatrix(int dimension) : BitMatrix(dimension, dimension) {} // Construct a square matrix.
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70 BitMatrix(BitMatrix&& other) noexcept = default;
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71 BitMatrix& operator=(BitMatrix&& other) noexcept = default;
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73 BitMatrix copy() const { return *this; }
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75 Range<data_t*> row(int y) { return {_bits.data() + y * _width, _bits.data() + (y + 1) * _width}; }
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76 Range<const data_t*> row(int y) const { return {_bits.data() + y * _width, _bits.data() + (y + 1) * _width}; }
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78 Range<StrideIter<const data_t*>> col(int x) const
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79 {
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80 return {{_bits.data() + x + (_height - 1) * _width, -_width}, {_bits.data() + x - _width, -_width}};
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81 }
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83 bool get(int x, int y) const { return get(y * _width + x); }
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84 void set(int x, int y, bool val = true) { get(y * _width + x) = val * SET_V; }
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86 /**
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87 * <p>Flips the given bit.</p>
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88 *
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89 * @param x The horizontal component (i.e. which column)
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90 * @param y The vertical component (i.e. which row)
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91 */
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92 void flip(int x, int y)
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93 {
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94 auto& v = get(y * _width + x);
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95 v = !v;
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96 }
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98 void flipAll()
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99 {
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100 for (auto& i : _bits)
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101 i = !i * SET_V;
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102 }
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103
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104 /**
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105 * <p>Sets a square region of the bit matrix to true.</p>
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106 *
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107 * @param left The horizontal position to begin at (inclusive)
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108 * @param top The vertical position to begin at (inclusive)
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109 * @param width The width of the region
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110 * @param height The height of the region
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111 */
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112 void setRegion(int left, int top, int width, int height);
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113
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114 void rotate90();
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115
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116 void rotate180();
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117
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118 void mirror();
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119
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120 /**
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121 * Find the rectangle that contains all non-white pixels. Useful for detection of 'pure' barcodes.
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122 *
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123 * @return True iff this rectangle is at least minWidth x minHeight pixels big
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124 */
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125 bool findBoundingBox(int &left, int& top, int& width, int& height, int minSize = 1) const;
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126
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127 int width() const { return _width; }
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128
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129 int height() const { return _height; }
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130
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131 bool empty() const { return _bits.empty(); }
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132
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133 friend bool operator==(const BitMatrix& a, const BitMatrix& b)
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134 {
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135 return a._width == b._width && a._height == b._height && a._bits == b._bits;
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136 }
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137
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138 template <typename T>
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139 bool isIn(PointT<T> p, int b = 0) const noexcept
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140 {
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141 return b <= p.x && p.x < width() - b && b <= p.y && p.y < height() - b;
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142 }
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143
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144 bool get(PointI p) const { return get(p.x, p.y); }
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145 bool get(PointF p) const { return get(PointI(p)); }
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146 void set(PointI p, bool v = true) { set(p.x, p.y, v); }
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147 void set(PointF p, bool v = true) { set(PointI(p), v); }
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148 };
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149
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150 void GetPatternRow(const BitMatrix& matrix, int r, std::vector<uint16_t>& pr, bool transpose);
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151
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152 /**
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153 * @brief Inflate scales a BitMatrix up and adds a quiet Zone plus padding
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154 * @param input matrix to be expanded
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155 * @param width new width in bits (pixel)
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156 * @param height new height in bits (pixel)
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157 * @param quietZone size of quiet zone to add in modules
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158 * @return expanded BitMatrix, maybe move(input) if size did not change
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159 */
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160 BitMatrix Inflate(BitMatrix&& input, int width, int height, int quietZone);
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161
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162 /**
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163 * @brief Deflate (crop + subsample) a bit matrix
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164 * @param input matrix to be shrinked
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165 * @param width new width
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166 * @param height new height
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167 * @param top cropping starts at top row
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168 * @param left cropping starts at left col
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169 * @param subSampling typically the module size
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170 * @return deflated input
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171 */
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172 BitMatrix Deflate(const BitMatrix& input, int width, int height, float top, float left, float subSampling);
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173
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174 template<typename T>
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175 BitMatrix ToBitMatrix(const Matrix<T>& in, T trueValue = {true})
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176 {
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177 BitMatrix out(in.width(), in.height());
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178 for (int y = 0; y < in.height(); ++y)
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179 for (int x = 0; x < in.width(); ++x)
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180 if (in.get(x, y) == trueValue)
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181 out.set(x, y);
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182 return out;
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183 }
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184
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185 template<typename T>
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186 Matrix<T> ToMatrix(const BitMatrix& in, T black = 0, T white = ~0)
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187 {
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188 Matrix<T> res(in.width(), in.height());
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189 for (int y = 0; y < in.height(); ++y)
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190 for (int x = 0; x < in.width(); ++x)
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191 res.set(x, y, in.get(x, y) ? black : white);
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192 return res;
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193 }
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194
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195 } // ZXing