Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/tesseract/src/ccstruct/polyblk.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 * File: polyblk.h (Formerly poly_block.h)
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3 * Description: Polygonal blocks
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4 *
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5 * (C) Copyright 1993, Hewlett-Packard Ltd.
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6 ** Licensed under the Apache License, Version 2.0 (the "License");
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7 ** you may not use this file except in compliance with the License.
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8 ** You may obtain a copy of the License at
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9 ** http://www.apache.org/licenses/LICENSE-2.0
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10 ** Unless required by applicable law or agreed to in writing, software
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11 ** distributed under the License is distributed on an "AS IS" BASIS,
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12 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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13 ** See the License for the specific language governing permissions and
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14 ** limitations under the License.
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15 *
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16 **********************************************************************/
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18 #ifndef POLYBLK_H
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19 #define POLYBLK_H
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21 #include "elst.h"
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22 #include "points.h"
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23 #include "rect.h"
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24 #include "scrollview.h"
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26 #include <tesseract/publictypes.h>
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28 namespace tesseract {
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30 class TESS_API POLY_BLOCK {
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31 public:
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32 POLY_BLOCK() = default;
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33 // Initialize from box coordinates.
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34 POLY_BLOCK(const TBOX &tbox, PolyBlockType type);
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35 POLY_BLOCK(ICOORDELT_LIST *points, PolyBlockType type);
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36 ~POLY_BLOCK() = default;
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38 TBOX *bounding_box() { // access function
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39 return &box;
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40 }
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42 ICOORDELT_LIST *points() { // access function
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43 return &vertices;
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44 }
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46 void compute_bb();
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48 PolyBlockType isA() const {
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49 return type;
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50 }
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52 bool IsText() const {
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53 return PTIsTextType(type);
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54 }
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56 // Rotate about the origin by the given rotation. (Analogous to
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57 // multiplying by a complex number.
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58 void rotate(FCOORD rotation);
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59 // Reflect the coords of the polygon in the y-axis. (Flip the sign of x.)
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60 void reflect_in_y_axis();
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61 // Move by adding shift to all coordinates.
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62 void move(ICOORD shift);
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64 #ifndef GRAPHICS_DISABLED
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66 void plot(ScrollView *window, int32_t num);
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68 void fill(ScrollView *window, ScrollView::Color colour);
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69 #endif // !GRAPHICS_DISABLED
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71 // Returns true if other is inside this.
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72 bool contains(POLY_BLOCK *other);
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74 // Returns true if the polygons of other and this overlap.
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75 bool overlap(POLY_BLOCK *other);
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77 // Returns the winding number of this around the test_pt.
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78 // Positive for anticlockwise, negative for clockwise, and zero for
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79 // test_pt outside this.
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80 int16_t winding_number(const ICOORD &test_pt);
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82 #ifndef GRAPHICS_DISABLED
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83 // Static utility functions to handle the PolyBlockType.
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84 // Returns a color to draw the given type.
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85 static ScrollView::Color ColorForPolyBlockType(PolyBlockType type);
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86 #endif // !GRAPHICS_DISABLED
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88 private:
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89 ICOORDELT_LIST vertices; // vertices
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90 TBOX box; // bounding box
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91 PolyBlockType type; // Type of this region.
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92 };
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94 // Class to iterate the scanlines of a polygon.
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95 class PB_LINE_IT {
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96 public:
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97 PB_LINE_IT(POLY_BLOCK *blkptr) {
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98 block = blkptr;
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99 }
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101 void set_to_block(POLY_BLOCK *blkptr) {
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102 block = blkptr;
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103 }
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104
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105 // Returns a list of runs of pixels for the given y coord.
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106 // Each element of the returned list is the start (x) and extent(y) of
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107 // a run inside the region.
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108 // Delete the returned list after use.
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109 ICOORDELT_LIST *get_line(TDimension y);
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110
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111 private:
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112 POLY_BLOCK *block;
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113 };
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114
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115 } // namespace tesseract
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116
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117 #endif