1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
|
// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
// Original code is licensed as follows:
/*
* Copyright 2008 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "xfa/src/fxbarcode/oned/BC_OneDimReader.h"
#include <memory>
#include "xfa/src/fxbarcode/BC_Reader.h"
#include "xfa/src/fxbarcode/common/BC_CommonBitArray.h"
#include "xfa/src/fxbarcode/oned/BC_OneDReader.h"
#include "xfa/src/fxbarcode/utils.h"
const int32_t CBC_OneDimReader::START_END_PATTERN[3] = {1, 1, 1};
const int32_t CBC_OneDimReader::MIDDLE_PATTERN[5] = {1, 1, 1, 1, 1};
const int32_t CBC_OneDimReader::L_PATTERNS[10][4] = {
{3, 2, 1, 1}, {2, 2, 2, 1}, {2, 1, 2, 2}, {1, 4, 1, 1}, {1, 1, 3, 2},
{1, 2, 3, 1}, {1, 1, 1, 4}, {1, 3, 1, 2}, {1, 2, 1, 3}, {3, 1, 1, 2}};
const int32_t CBC_OneDimReader::L_AND_G_PATTERNS[20][4] = {
{3, 2, 1, 1}, {2, 2, 2, 1}, {2, 1, 2, 2}, {1, 4, 1, 1}, {1, 1, 3, 2},
{1, 2, 3, 1}, {1, 1, 1, 4}, {1, 3, 1, 2}, {1, 2, 1, 3}, {3, 1, 1, 2},
{1, 1, 2, 3}, {1, 2, 2, 2}, {2, 2, 1, 2}, {1, 1, 4, 1}, {2, 3, 1, 1},
{1, 3, 2, 1}, {4, 1, 1, 1}, {2, 1, 3, 1}, {3, 1, 2, 1}, {2, 1, 1, 3}};
CBC_OneDimReader::CBC_OneDimReader() {}
CBC_OneDimReader::~CBC_OneDimReader() {}
CFX_Int32Array* CBC_OneDimReader::FindStartGuardPattern(CBC_CommonBitArray* row,
int32_t& e) {
FX_BOOL foundStart = FALSE;
CFX_Int32Array* startRange = NULL;
CFX_Int32Array startEndPattern;
startEndPattern.SetSize(3);
startEndPattern[0] = START_END_PATTERN[0];
startEndPattern[1] = START_END_PATTERN[1];
startEndPattern[2] = START_END_PATTERN[2];
int32_t nextStart = 0;
while (!foundStart) {
delete startRange;
startRange = FindGuardPattern(row, nextStart, FALSE, &startEndPattern, e);
BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
int32_t start = (*startRange)[0];
nextStart = (*startRange)[1];
if (start <= 1) {
break;
}
int32_t quietStart = start - (nextStart - start);
if (quietStart >= 0) {
FX_BOOL booT = row->IsRange(quietStart, start, FALSE, e);
BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
foundStart = booT;
}
}
return startRange;
}
CFX_ByteString CBC_OneDimReader::DecodeRow(int32_t rowNumber,
CBC_CommonBitArray* row,
int32_t hints,
int32_t& e) {
std::unique_ptr<CFX_Int32Array> result(FindStartGuardPattern(row, e));
BC_EXCEPTION_CHECK_ReturnValue(e, "");
CFX_ByteString temp = DecodeRow(rowNumber, row, result.get(), hints, e);
BC_EXCEPTION_CHECK_ReturnValue(e, "");
return temp;
}
CFX_ByteString CBC_OneDimReader::DecodeRow(int32_t rowNumber,
CBC_CommonBitArray* row,
CFX_Int32Array* startGuardRange,
int32_t hints,
int32_t& e) {
CFX_ByteString result;
DecodeMiddle(row, startGuardRange, result, e);
BC_EXCEPTION_CHECK_ReturnValue(e, "");
FX_BOOL b = CheckChecksum(result, e);
BC_EXCEPTION_CHECK_ReturnValue(e, "");
if (!b) {
e = BCExceptionChecksumException;
return "";
}
return result;
}
FX_BOOL CBC_OneDimReader::CheckChecksum(CFX_ByteString& s, int32_t& e) {
FX_BOOL temp = CheckStandardUPCEANChecksum(s, e);
BC_EXCEPTION_CHECK_ReturnValue(e, FALSE);
return temp;
}
FX_BOOL CBC_OneDimReader::CheckStandardUPCEANChecksum(CFX_ByteString& s,
int32_t& e) {
int32_t length = s.GetLength();
if (length == 0) {
return FALSE;
}
int32_t sum = 0;
for (int32_t i = length - 2; i >= 0; i -= 2) {
int32_t digit = (int32_t)s[i] - (int32_t)'0';
if (digit < 0 || digit > 9) {
e = BCExceptionFormatException;
return FALSE;
}
sum += digit;
}
sum *= 3;
for (int32_t j = length - 1; j >= 0; j -= 2) {
int32_t digit = (int32_t)s[j] - (int32_t)'0';
if (digit < 0 || digit > 9) {
e = BCExceptionFormatException;
return FALSE;
}
sum += digit;
}
return sum % 10 == 0;
}
CFX_Int32Array* CBC_OneDimReader::DecodeEnd(CBC_CommonBitArray* row,
int32_t endStart,
int32_t& e) {
CFX_Int32Array startEndPattern;
startEndPattern.Add(START_END_PATTERN[0]);
startEndPattern.Add(START_END_PATTERN[1]);
startEndPattern.Add(START_END_PATTERN[2]);
CFX_Int32Array* FindGuard =
FindGuardPattern(row, endStart, FALSE, &startEndPattern, e);
BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
return FindGuard;
}
CFX_Int32Array* CBC_OneDimReader::FindGuardPattern(CBC_CommonBitArray* row,
int32_t rowOffset,
FX_BOOL whiteFirst,
CFX_Int32Array* pattern,
int32_t& e) {
int32_t patternLength = pattern->GetSize();
CFX_Int32Array counters;
counters.SetSize(patternLength);
int32_t width = row->GetSize();
FX_BOOL isWhite = FALSE;
while (rowOffset < width) {
isWhite = !row->Get(rowOffset);
if (whiteFirst == isWhite) {
break;
}
rowOffset++;
}
int32_t counterPosition = 0;
int32_t patternStart = rowOffset;
for (int32_t x = rowOffset; x < width; x++) {
FX_BOOL pixel = row->Get(x);
if (pixel ^ isWhite) {
counters[counterPosition]++;
} else {
if (counterPosition == patternLength - 1) {
if (PatternMatchVariance(&counters, &(*pattern)[0],
MAX_INDIVIDUAL_VARIANCE) < MAX_AVG_VARIANCE) {
CFX_Int32Array* result = new CFX_Int32Array();
result->SetSize(2);
(*result)[0] = patternStart;
(*result)[1] = x;
return result;
}
patternStart += counters[0] + counters[1];
for (int32_t y = 2; y < patternLength; y++) {
counters[y - 2] = counters[y];
}
counters[patternLength - 2] = 0;
counters[patternLength - 1] = 0;
counterPosition--;
} else {
counterPosition++;
}
counters[counterPosition] = 1;
isWhite = !isWhite;
}
}
e = BCExceptionNotFound;
BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
return NULL;
}
int32_t CBC_OneDimReader::DecodeDigit(CBC_CommonBitArray* row,
CFX_Int32Array* counters,
int32_t rowOffset,
const int32_t* patterns,
int32_t patternLength,
int32_t& e) {
RecordPattern(row, rowOffset, counters, e);
BC_EXCEPTION_CHECK_ReturnValue(e, 0);
int32_t bestVariance = MAX_AVG_VARIANCE;
int32_t bestMatch = -1;
int32_t max = patternLength;
for (int32_t i = 0; i < max; i++) {
int32_t variance = PatternMatchVariance(counters, &patterns[i * 4],
MAX_INDIVIDUAL_VARIANCE);
if (variance < bestVariance) {
bestVariance = variance;
bestMatch = i;
}
}
if (bestMatch >= 0) {
return bestMatch;
} else {
e = BCExceptionNotFound;
return 0;
}
return 0;
}
|