Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/tesseract/src/ccstruct/pdblock.h @ 22:d77477b4e151

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Let _int_rc() also handle (i.e. ignore) a local version suffix
author Franz Glasner <fzglas.hg@dom66.de>
date Fri, 19 Sep 2025 12:05:57 +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: pdblock.h (Formerly pdblk.h)
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3 * Description: Page block class definition.
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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 #ifndef PDBLOCK_H
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20 #define PDBLOCK_H
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22 #include "clst.h"
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23 #include "polyblk.h"
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25 struct Pix;
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27 namespace tesseract {
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29 class PDBLK; // forward decl
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31 CLISTIZEH(PDBLK)
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32 /// page block
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33 class PDBLK {
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34 friend class BLOCK_RECT_IT; ///< block iterator
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35 friend class BLOCK; ///< Page Block
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37 public:
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38 /// empty constructor
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39 PDBLK() {
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40 hand_poly = nullptr;
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41 index_ = 0;
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42 }
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43 /// simple constructor
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44 PDBLK(TDimension xmin, ///< bottom left
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45 TDimension ymin,
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46 TDimension xmax, ///< top right
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47 TDimension ymax);
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49 /// set vertex lists
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50 ///@param left list of left vertices
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51 ///@param right list of right vertices
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52 void set_sides(ICOORDELT_LIST *left, ICOORDELT_LIST *right);
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54 /// destructor
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55 ~PDBLK() {
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56 delete hand_poly;
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57 }
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59 POLY_BLOCK *poly_block() const {
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60 return hand_poly;
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61 }
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62 /// set the poly block
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63 void set_poly_block(POLY_BLOCK *blk) {
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64 hand_poly = blk;
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65 }
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66 /// get box
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67 void bounding_box(ICOORD &bottom_left, // bottom left
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68 ICOORD &top_right) const { // topright
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69 bottom_left = box.botleft();
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70 top_right = box.topright();
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71 }
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72 /// get real box
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73 const TBOX &bounding_box() const {
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74 return box;
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75 }
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77 int index() const {
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78 return index_;
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79 }
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80 void set_index(int value) {
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81 index_ = value;
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82 }
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84 /// is pt inside block
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85 bool contains(ICOORD pt);
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87 /// reposition block
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88 void move(const ICOORD vec); // by vector
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90 // Returns a binary Pix mask with a 1 pixel for every pixel within the
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91 // block. Rotates the coordinate system by rerotation prior to rendering.
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92 // If not nullptr, mask_box is filled with the position box of the returned
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93 // mask image.
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94 Image render_mask(const FCOORD &rerotation, TBOX *mask_box);
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95
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96 #ifndef GRAPHICS_DISABLED
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97 /// draw histogram
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98 ///@param window window to draw in
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99 ///@param serial serial number
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100 ///@param colour colour to draw in
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101 void plot(ScrollView *window, int32_t serial, ScrollView::Color colour);
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102 #endif // !GRAPHICS_DISABLED
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103
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104 /// assignment
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105 ///@param source from this
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106 PDBLK &operator=(const PDBLK &source);
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107
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108 protected:
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109 POLY_BLOCK *hand_poly; ///< weird as well
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110 ICOORDELT_LIST leftside; ///< left side vertices
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111 ICOORDELT_LIST rightside; ///< right side vertices
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112 TBOX box; ///< bounding box
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113 int index_; ///< Serial number of this block.
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114 };
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115
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116 class BLOCK_RECT_IT // rectangle iterator
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117 {
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118 public:
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119 /// constructor
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120 ///@param blkptr block to iterate
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121 BLOCK_RECT_IT(PDBLK *blkptr);
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122
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123 /// start (new) block
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124 void set_to_block(PDBLK *blkptr); // block to iterate
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125
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126 /// start iteration
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127 void start_block();
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128
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129 /// next rectangle
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130 void forward();
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131
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132 /// test end
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133 bool cycled_rects() const {
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134 return left_it.cycled_list() && right_it.cycled_list();
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135 }
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136
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137 /// current rectangle
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138 ///@param bleft bottom left
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139 ///@param tright top right
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140 void bounding_box(ICOORD &bleft, ICOORD &tright) {
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141 // bottom left
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142 bleft = ICOORD(left_it.data()->x(), ymin);
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143 // top right
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144 tright = ICOORD(right_it.data()->x(), ymax);
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145 }
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146
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147 private:
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148 TDimension ymin = 0; ///< bottom of rectangle
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149 TDimension ymax = 0; ///< top of rectangle
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150 PDBLK *block = nullptr; ///< block to iterate
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151 ICOORDELT_IT left_it; ///< boundary iterators
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152 ICOORDELT_IT right_it;
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153 };
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154
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155 /// rectangle iterator
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156 class BLOCK_LINE_IT {
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157 public:
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158 /// constructor
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159 ///@param blkptr from block
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160 BLOCK_LINE_IT(PDBLK *blkptr) : rect_it(blkptr) {
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161 block = blkptr; // remember block
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162 }
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163
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164 /// start (new) block
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165 ///@param blkptr block to start
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166 void set_to_block(PDBLK *blkptr) {
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167 block = blkptr; // remember block
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168 // set iterator
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169 rect_it.set_to_block(blkptr);
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170 }
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171
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172 /// get a line
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173 ///@param y line to get
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174 ///@param xext output extent
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175 TDimension get_line(TDimension y, TDimension &xext);
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176
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177 private:
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178 PDBLK *block; ///< block to iterate
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179 BLOCK_RECT_IT rect_it; ///< rectangle iterator
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180 };
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181
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182 } // namespace tesseract
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183
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184 #endif