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| 1 // Copyright 2014 PDFium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com | |
| 6 // Original code is licensed as follows: | |
| 7 /* | |
| 8 * Copyright 2008 ZXing authors | |
| 9 * | |
| 10 * Licensed under the Apache License, Version 2.0 (the "License"); | |
| 11 * you may not use this file except in compliance with the License. | |
| 12 * You may obtain a copy of the License at | |
| 13 * | |
| 14 * http://www.apache.org/licenses/LICENSE-2.0 | |
| 15 * | |
| 16 * Unless required by applicable law or agreed to in writing, software | |
| 17 * distributed under the License is distributed on an "AS IS" BASIS, | |
| 18 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 19 * See the License for the specific language governing permissions and | |
| 20 * limitations under the License. | |
| 21 */ | |
| 22 | |
| 23 #include "xfa/src/fxbarcode/oned/BC_OneDimReader.h" | |
| 24 | |
| 25 #include <memory> | |
| 26 | |
| 27 #include "xfa/src/fxbarcode/BC_Reader.h" | |
| 28 #include "xfa/src/fxbarcode/common/BC_CommonBitArray.h" | |
| 29 #include "xfa/src/fxbarcode/oned/BC_OneDReader.h" | |
| 30 #include "xfa/src/fxbarcode/utils.h" | |
| 31 | |
| 32 const int32_t CBC_OneDimReader::START_END_PATTERN[3] = {1, 1, 1}; | |
| 33 const int32_t CBC_OneDimReader::MIDDLE_PATTERN[5] = {1, 1, 1, 1, 1}; | |
| 34 const int32_t CBC_OneDimReader::L_PATTERNS[10][4] = { | |
| 35 {3, 2, 1, 1}, {2, 2, 2, 1}, {2, 1, 2, 2}, {1, 4, 1, 1}, {1, 1, 3, 2}, | |
| 36 {1, 2, 3, 1}, {1, 1, 1, 4}, {1, 3, 1, 2}, {1, 2, 1, 3}, {3, 1, 1, 2}}; | |
| 37 const int32_t CBC_OneDimReader::L_AND_G_PATTERNS[20][4] = { | |
| 38 {3, 2, 1, 1}, {2, 2, 2, 1}, {2, 1, 2, 2}, {1, 4, 1, 1}, {1, 1, 3, 2}, | |
| 39 {1, 2, 3, 1}, {1, 1, 1, 4}, {1, 3, 1, 2}, {1, 2, 1, 3}, {3, 1, 1, 2}, | |
| 40 {1, 1, 2, 3}, {1, 2, 2, 2}, {2, 2, 1, 2}, {1, 1, 4, 1}, {2, 3, 1, 1}, | |
| 41 {1, 3, 2, 1}, {4, 1, 1, 1}, {2, 1, 3, 1}, {3, 1, 2, 1}, {2, 1, 1, 3}}; | |
| 42 | |
| 43 CBC_OneDimReader::CBC_OneDimReader() {} | |
| 44 CBC_OneDimReader::~CBC_OneDimReader() {} | |
| 45 CFX_Int32Array* CBC_OneDimReader::FindStartGuardPattern(CBC_CommonBitArray* row, | |
| 46 int32_t& e) { | |
| 47 FX_BOOL foundStart = FALSE; | |
| 48 CFX_Int32Array* startRange = NULL; | |
| 49 CFX_Int32Array startEndPattern; | |
| 50 startEndPattern.SetSize(3); | |
| 51 startEndPattern[0] = START_END_PATTERN[0]; | |
| 52 startEndPattern[1] = START_END_PATTERN[1]; | |
| 53 startEndPattern[2] = START_END_PATTERN[2]; | |
| 54 int32_t nextStart = 0; | |
| 55 while (!foundStart) { | |
| 56 delete startRange; | |
| 57 startRange = FindGuardPattern(row, nextStart, FALSE, &startEndPattern, e); | |
| 58 BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
| 59 int32_t start = (*startRange)[0]; | |
| 60 nextStart = (*startRange)[1]; | |
| 61 if (start <= 1) { | |
| 62 break; | |
| 63 } | |
| 64 int32_t quietStart = start - (nextStart - start); | |
| 65 if (quietStart >= 0) { | |
| 66 FX_BOOL booT = row->IsRange(quietStart, start, FALSE, e); | |
| 67 BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
| 68 foundStart = booT; | |
| 69 } | |
| 70 } | |
| 71 return startRange; | |
| 72 } | |
| 73 CFX_ByteString CBC_OneDimReader::DecodeRow(int32_t rowNumber, | |
| 74 CBC_CommonBitArray* row, | |
| 75 int32_t hints, | |
| 76 int32_t& e) { | |
| 77 std::unique_ptr<CFX_Int32Array> result(FindStartGuardPattern(row, e)); | |
| 78 BC_EXCEPTION_CHECK_ReturnValue(e, ""); | |
| 79 CFX_ByteString temp = DecodeRow(rowNumber, row, result.get(), hints, e); | |
| 80 BC_EXCEPTION_CHECK_ReturnValue(e, ""); | |
| 81 return temp; | |
| 82 } | |
| 83 CFX_ByteString CBC_OneDimReader::DecodeRow(int32_t rowNumber, | |
| 84 CBC_CommonBitArray* row, | |
| 85 CFX_Int32Array* startGuardRange, | |
| 86 int32_t hints, | |
| 87 int32_t& e) { | |
| 88 CFX_ByteString result; | |
| 89 DecodeMiddle(row, startGuardRange, result, e); | |
| 90 BC_EXCEPTION_CHECK_ReturnValue(e, ""); | |
| 91 FX_BOOL b = CheckChecksum(result, e); | |
| 92 BC_EXCEPTION_CHECK_ReturnValue(e, ""); | |
| 93 if (!b) { | |
| 94 e = BCExceptionChecksumException; | |
| 95 return ""; | |
| 96 } | |
| 97 return result; | |
| 98 } | |
| 99 FX_BOOL CBC_OneDimReader::CheckChecksum(CFX_ByteString& s, int32_t& e) { | |
| 100 FX_BOOL temp = CheckStandardUPCEANChecksum(s, e); | |
| 101 BC_EXCEPTION_CHECK_ReturnValue(e, FALSE); | |
| 102 return temp; | |
| 103 } | |
| 104 FX_BOOL CBC_OneDimReader::CheckStandardUPCEANChecksum(CFX_ByteString& s, | |
| 105 int32_t& e) { | |
| 106 int32_t length = s.GetLength(); | |
| 107 if (length == 0) { | |
| 108 return FALSE; | |
| 109 } | |
| 110 int32_t sum = 0; | |
| 111 for (int32_t i = length - 2; i >= 0; i -= 2) { | |
| 112 int32_t digit = (int32_t)s[i] - (int32_t)'0'; | |
| 113 if (digit < 0 || digit > 9) { | |
| 114 e = BCExceptionFormatException; | |
| 115 return FALSE; | |
| 116 } | |
| 117 sum += digit; | |
| 118 } | |
| 119 sum *= 3; | |
| 120 for (int32_t j = length - 1; j >= 0; j -= 2) { | |
| 121 int32_t digit = (int32_t)s[j] - (int32_t)'0'; | |
| 122 if (digit < 0 || digit > 9) { | |
| 123 e = BCExceptionFormatException; | |
| 124 return FALSE; | |
| 125 } | |
| 126 sum += digit; | |
| 127 } | |
| 128 return sum % 10 == 0; | |
| 129 } | |
| 130 CFX_Int32Array* CBC_OneDimReader::DecodeEnd(CBC_CommonBitArray* row, | |
| 131 int32_t endStart, | |
| 132 int32_t& e) { | |
| 133 CFX_Int32Array startEndPattern; | |
| 134 startEndPattern.Add(START_END_PATTERN[0]); | |
| 135 startEndPattern.Add(START_END_PATTERN[1]); | |
| 136 startEndPattern.Add(START_END_PATTERN[2]); | |
| 137 CFX_Int32Array* FindGuard = | |
| 138 FindGuardPattern(row, endStart, FALSE, &startEndPattern, e); | |
| 139 BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
| 140 return FindGuard; | |
| 141 } | |
| 142 CFX_Int32Array* CBC_OneDimReader::FindGuardPattern(CBC_CommonBitArray* row, | |
| 143 int32_t rowOffset, | |
| 144 FX_BOOL whiteFirst, | |
| 145 CFX_Int32Array* pattern, | |
| 146 int32_t& e) { | |
| 147 int32_t patternLength = pattern->GetSize(); | |
| 148 CFX_Int32Array counters; | |
| 149 counters.SetSize(patternLength); | |
| 150 int32_t width = row->GetSize(); | |
| 151 FX_BOOL isWhite = FALSE; | |
| 152 while (rowOffset < width) { | |
| 153 isWhite = !row->Get(rowOffset); | |
| 154 if (whiteFirst == isWhite) { | |
| 155 break; | |
| 156 } | |
| 157 rowOffset++; | |
| 158 } | |
| 159 int32_t counterPosition = 0; | |
| 160 int32_t patternStart = rowOffset; | |
| 161 for (int32_t x = rowOffset; x < width; x++) { | |
| 162 FX_BOOL pixel = row->Get(x); | |
| 163 if (pixel ^ isWhite) { | |
| 164 counters[counterPosition]++; | |
| 165 } else { | |
| 166 if (counterPosition == patternLength - 1) { | |
| 167 if (PatternMatchVariance(&counters, &(*pattern)[0], | |
| 168 MAX_INDIVIDUAL_VARIANCE) < MAX_AVG_VARIANCE) { | |
| 169 CFX_Int32Array* result = new CFX_Int32Array(); | |
| 170 result->SetSize(2); | |
| 171 (*result)[0] = patternStart; | |
| 172 (*result)[1] = x; | |
| 173 return result; | |
| 174 } | |
| 175 patternStart += counters[0] + counters[1]; | |
| 176 for (int32_t y = 2; y < patternLength; y++) { | |
| 177 counters[y - 2] = counters[y]; | |
| 178 } | |
| 179 counters[patternLength - 2] = 0; | |
| 180 counters[patternLength - 1] = 0; | |
| 181 counterPosition--; | |
| 182 } else { | |
| 183 counterPosition++; | |
| 184 } | |
| 185 counters[counterPosition] = 1; | |
| 186 isWhite = !isWhite; | |
| 187 } | |
| 188 } | |
| 189 e = BCExceptionNotFound; | |
| 190 BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
| 191 return NULL; | |
| 192 } | |
| 193 int32_t CBC_OneDimReader::DecodeDigit(CBC_CommonBitArray* row, | |
| 194 CFX_Int32Array* counters, | |
| 195 int32_t rowOffset, | |
| 196 const int32_t* patterns, | |
| 197 int32_t patternLength, | |
| 198 int32_t& e) { | |
| 199 RecordPattern(row, rowOffset, counters, e); | |
| 200 BC_EXCEPTION_CHECK_ReturnValue(e, 0); | |
| 201 int32_t bestVariance = MAX_AVG_VARIANCE; | |
| 202 int32_t bestMatch = -1; | |
| 203 int32_t max = patternLength; | |
| 204 for (int32_t i = 0; i < max; i++) { | |
| 205 int32_t variance = PatternMatchVariance(counters, &patterns[i * 4], | |
| 206 MAX_INDIVIDUAL_VARIANCE); | |
| 207 if (variance < bestVariance) { | |
| 208 bestVariance = variance; | |
| 209 bestMatch = i; | |
| 210 } | |
| 211 } | |
| 212 if (bestMatch >= 0) { | |
| 213 return bestMatch; | |
| 214 } else { | |
| 215 e = BCExceptionNotFound; | |
| 216 return 0; | |
| 217 } | |
| 218 return 0; | |
| 219 } | |
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Chromium Code Reviews
Issue 1803723002:
Move xfa/src up to xfa/. (Closed)
Base URL: https://pdfium.googlesource.com/pdfium.git@master