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comparison mupdf-source/thirdparty/tesseract/src/ccstruct/ocrrow.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 * File: ocrrow.h (Formerly row.h)
3 * Description: Code for the ROW class.
4 * Author: Ray Smith
5 * Created: Tue Oct 08 15:58:04 BST 1991
6 *
7 * (C) Copyright 1991, Hewlett-Packard Ltd.
8 ** Licensed under the Apache License, Version 2.0 (the "License");
9 ** you may not use this file except in compliance with the License.
10 ** You may obtain a copy of the License at
11 ** http://www.apache.org/licenses/LICENSE-2.0
12 ** Unless required by applicable law or agreed to in writing, software
13 ** distributed under the License is distributed on an "AS IS" BASIS,
14 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 ** See the License for the specific language governing permissions and
16 ** limitations under the License.
17 *
18 **********************************************************************/
19
20 #ifndef OCRROW_H
21 #define OCRROW_H
22
23 #include "elst.h" // for ELIST_ITERATOR, ELISTIZEH, ELIST_LINK
24 #include "quspline.h" // for QSPLINE
25 #include "rect.h" // for TBOX
26 #include "scrollview.h" // for ScrollView, ScrollView::Color
27 #include "werd.h" // for WERD_LIST
28
29 #include <cstdint> // for int16_t, int32_t
30 #include <cstdio> // for FILE
31
32 namespace tesseract {
33
34 class ICOORD;
35 class TO_ROW;
36
37 struct PARA;
38
39 class ROW : public ELIST_LINK {
40 friend void tweak_row_baseline(ROW *, double, double);
41
42 public:
43 ROW() = default;
44 ROW( // constructor
45 int32_t spline_size, // no of segments
46 int32_t *xstarts, // segment boundaries
47 double *coeffs, // coefficients //ascender size
48 float x_height, float ascenders,
49 float descenders, // descender size
50 int16_t kern, // char gap
51 int16_t space); // word gap
52 ROW( // constructor
53 TO_ROW *row, // textord row
54 int16_t kern, // char gap
55 int16_t space); // word gap
56
57 WERD_LIST *word_list() { // get words
58 return &words;
59 }
60
61 float base_line( // compute baseline
62 float xpos) const { // at the position
63 // get spline value
64 return static_cast<float>(baseline.y(xpos));
65 }
66 float x_height() const { // return x height
67 return xheight;
68 }
69 void set_x_height(float new_xheight) { // set x height
70 xheight = new_xheight;
71 }
72 int32_t kern() const { // return kerning
73 return kerning;
74 }
75 float body_size() const { // return body size
76 return bodysize;
77 }
78 void set_body_size(float new_size) { // set body size
79 bodysize = new_size;
80 }
81 int32_t space() const { // return spacing
82 return spacing;
83 }
84 float ascenders() const { // return size
85 return ascrise;
86 }
87 float descenders() const { // return size
88 return descdrop;
89 }
90 TBOX bounding_box() const { // return bounding box
91 return bound_box;
92 }
93 // Returns the bounding box including the desired combination of upper and
94 // lower noise/diacritic elements.
95 TBOX restricted_bounding_box(bool upper_dots, bool lower_dots) const;
96
97 void set_lmargin(int16_t lmargin) {
98 lmargin_ = lmargin;
99 }
100 void set_rmargin(int16_t rmargin) {
101 rmargin_ = rmargin;
102 }
103 int16_t lmargin() const {
104 return lmargin_;
105 }
106 int16_t rmargin() const {
107 return rmargin_;
108 }
109
110 void set_has_drop_cap(bool has) {
111 has_drop_cap_ = has;
112 }
113 bool has_drop_cap() const {
114 return has_drop_cap_;
115 }
116
117 void set_para(PARA *p) {
118 para_ = p;
119 }
120 PARA *para() const {
121 return para_;
122 }
123
124 void recalc_bounding_box(); // recalculate BB
125
126 void move( // reposition row
127 const ICOORD vec); // by vector
128
129 void print( // print
130 FILE *fp) const; // file to print on
131
132 #ifndef GRAPHICS_DISABLED
133 void plot( // draw one
134 ScrollView *window, // window to draw in
135 ScrollView::Color colour); // uniform colour
136 void plot( // draw one
137 ScrollView *window); // in rainbow colours
138
139 void plot_baseline( // draw the baseline
140 ScrollView *window, // window to draw in
141 ScrollView::Color colour) { // colour to draw
142 // draw it
143 baseline.plot(window, colour);
144 }
145 #endif // !GRAPHICS_DISABLED
146 ROW &operator=(const ROW &source);
147
148 private:
149 // Copy constructor (currently unused, therefore private).
150 ROW(const ROW &source) = delete;
151
152 int32_t kerning; // inter char gap
153 int32_t spacing; // inter word gap
154 TBOX bound_box; // bounding box
155 float xheight; // height of line
156 float ascrise; // size of ascenders
157 float descdrop; //-size of descenders
158 float bodysize; // CJK character size. (equals to
159 // xheight+ascrise by default)
160 WERD_LIST words; // words
161 QSPLINE baseline; // baseline spline
162
163 // These get set after blocks have been determined.
164 bool has_drop_cap_;
165 int16_t lmargin_; // Distance to left polyblock margin.
166 int16_t rmargin_; // Distance to right polyblock margin.
167
168 // This gets set during paragraph analysis.
169 PARA *para_; // Paragraph of which this row is part.
170 };
171
172 ELISTIZEH(ROW)
173
174 } // namespace tesseract
175
176 #endif