tesseract 4.1.1
Loading...
Searching...
No Matches
blread.cpp
Go to the documentation of this file.
1/**********************************************************************
2 * File: blread.cpp (Formerly pdread.c)
3 * Description: Friend function of BLOCK to read the uscan pd file.
4 * Author: Ray Smith
5 *
6 * (C) Copyright 1991, Hewlett-Packard Ltd.
7 ** Licensed under the Apache License, Version 2.0 (the "License");
8 ** you may not use this file except in compliance with the License.
9 ** You may obtain a copy of the License at
10 ** http://www.apache.org/licenses/LICENSE-2.0
11 ** Unless required by applicable law or agreed to in writing, software
12 ** distributed under the License is distributed on an "AS IS" BASIS,
13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 ** See the License for the specific language governing permissions and
15 ** limitations under the License.
16 *
17 **********************************************************************/
18
19#include "blread.h"
20#include <cstdio> // for fclose, fopen, FILE
21#include "ocrblock.h" // for BLOCK_IT, BLOCK, BLOCK_LIST (ptr only)
22#include "scanutils.h" // for tfscanf
23
24#define UNLV_EXT ".uzn" // unlv zone file
25
26/**********************************************************************
27 * read_unlv_file
28 *
29 * Read a whole unlv zone file to make a list of blocks.
30 **********************************************************************/
31
32bool read_unlv_file( //print list of sides
33 STRING name, //basename of file
34 int32_t xsize, //image size
35 int32_t ysize, //image size
36 BLOCK_LIST *blocks //output list
37 ) {
38 FILE *pdfp; //file pointer
39 BLOCK *block; //current block
40 int x; //current top-down coords
41 int y;
42 int width; //of current block
43 int height;
44 BLOCK_IT block_it = blocks; //block iterator
45
46 name += UNLV_EXT; //add extension
47 if ((pdfp = fopen (name.string (), "rb")) == nullptr) {
48 return false; //didn't read one
49 } else {
50 while (tfscanf(pdfp, "%d %d %d %d %*s", &x, &y, &width, &height) >= 4) {
51 //make rect block
52 block = new BLOCK (name.string (), true, 0, 0,
53 static_cast<int16_t>(x), static_cast<int16_t>(ysize - y - height),
54 static_cast<int16_t>(x + width), static_cast<int16_t>(ysize - y));
55 //on end of list
56 block_it.add_to_end (block);
57 }
58 fclose(pdfp);
59 }
60 tprintf("UZN file %s loaded.\n", name.string());
61 return true;
62}
63
64void FullPageBlock(int width, int height, BLOCK_LIST *blocks) {
65 BLOCK_IT block_it(blocks);
66 auto* block = new BLOCK("", true, 0, 0, 0, 0, width, height);
67 block_it.add_to_end(block);
68}
void FullPageBlock(int width, int height, BLOCK_LIST *blocks)
Definition: blread.cpp:64
bool read_unlv_file(STRING name, int32_t xsize, int32_t ysize, BLOCK_LIST *blocks)
Definition: blread.cpp:32
#define UNLV_EXT
Definition: blread.cpp:24
int tfscanf(FILE *stream, const char *format,...)
Definition: scanutils.cpp:181
DLLSYM void tprintf(const char *format,...)
Definition: tprintf.cpp:35
Definition: ocrblock.h:31
Definition: strngs.h:45
const char * string() const
Definition: strngs.cpp:194