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comparison mupdf-source/thirdparty/tesseract/src/wordrec/render.cpp @ 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 *
3 * File: render.cpp (Formerly render.c)
4 * Description: Convert the various data type into line lists
5 * Author: Mark Seaman, OCR Technology
6 *
7 * (c) Copyright 1989, Hewlett-Packard Company.
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 // Include automatically generated configuration file if running autoconf.
21 #ifdef HAVE_CONFIG_H
22 # include "config_auto.h"
23 #endif
24
25 #include "render.h"
26
27 #include "blobs.h"
28
29 #include <cmath>
30
31 namespace tesseract {
32
33 /*----------------------------------------------------------------------
34 V a r i a b l e s
35 ----------------------------------------------------------------------*/
36 ScrollView *blob_window = nullptr;
37
38 ScrollView::Color color_list[] = {ScrollView::RED, ScrollView::CYAN, ScrollView::YELLOW,
39 ScrollView::BLUE, ScrollView::GREEN, ScrollView::WHITE};
40
41 BOOL_VAR(wordrec_display_all_blobs, 0, "Display Blobs");
42
43 BOOL_VAR(wordrec_blob_pause, 0, "Blob pause");
44
45 /*----------------------------------------------------------------------
46 F u n c t i o n s
47 ----------------------------------------------------------------------*/
48 #ifndef GRAPHICS_DISABLED
49 /**********************************************************************
50 * display_blob
51 *
52 * Macro to display blob in a window.
53 **********************************************************************/
54 void display_blob(TBLOB *blob, ScrollView::Color color) {
55 /* Size of drawable */
56 if (blob_window == nullptr) {
57 blob_window = new ScrollView("Blobs", 520, 10, 500, 256, 2000, 256, true);
58 } else {
59 blob_window->Clear();
60 }
61
62 render_blob(blob_window, blob, color);
63 }
64
65 /**********************************************************************
66 * render_blob
67 *
68 * Create a list of line segments that represent the expanded outline
69 * that was supplied as input.
70 **********************************************************************/
71 void render_blob(ScrollView *window, TBLOB *blob, ScrollView::Color color) {
72 /* No outline */
73 if (!blob) {
74 return;
75 }
76
77 render_outline(window, blob->outlines, color);
78 }
79
80 /**********************************************************************
81 * render_edgepts
82 *
83 * Create a list of line segments that represent the expanded outline
84 * that was supplied as input.
85 **********************************************************************/
86 void render_edgepts(ScrollView *window, EDGEPT *edgept, ScrollView::Color color) {
87 if (!edgept) {
88 return;
89 }
90
91 float x = edgept->pos.x;
92 float y = edgept->pos.y;
93 EDGEPT *this_edge = edgept;
94
95 window->Pen(color);
96 window->SetCursor(x, y);
97 do {
98 this_edge = this_edge->next;
99 x = this_edge->pos.x;
100 y = this_edge->pos.y;
101 window->DrawTo(x, y);
102 } while (edgept != this_edge);
103 }
104
105 /**********************************************************************
106 * render_outline
107 *
108 * Create a list of line segments that represent the expanded outline
109 * that was supplied as input.
110 **********************************************************************/
111 void render_outline(ScrollView *window, TESSLINE *outline, ScrollView::Color color) {
112 /* No outline */
113 if (!outline) {
114 return;
115 }
116 /* Draw Compact outline */
117 if (outline->loop) {
118 render_edgepts(window, outline->loop, color);
119 }
120 /* Add on next outlines */
121 render_outline(window, outline->next, color);
122 }
123
124 #endif // !GRAPHICS_DISABLED
125
126 } // namespace tesseract