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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 2007 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/qrcode/BC_QRBitMatrixParser.h" | |
| 24 | |
| 25 #include <memory> | |
| 26 | |
| 27 #include "xfa/src/fxbarcode/common/BC_CommonBitMatrix.h" | |
| 28 #include "xfa/src/fxbarcode/qrcode/BC_QRCoderFormatInformation.h" | |
| 29 #include "xfa/src/fxbarcode/qrcode/BC_QRCoderVersion.h" | |
| 30 #include "xfa/src/fxbarcode/qrcode/BC_QRDataMask.h" | |
| 31 #include "xfa/src/fxbarcode/utils.h" | |
| 32 | |
| 33 CBC_QRBitMatrixParser::CBC_QRBitMatrixParser() {} | |
| 34 void CBC_QRBitMatrixParser::Init(CBC_CommonBitMatrix* bitMatrix, int32_t& e) { | |
| 35 m_dimension = bitMatrix->GetDimension(e); | |
| 36 BC_EXCEPTION_CHECK_ReturnVoid(e); | |
| 37 m_tempBitMatrix = bitMatrix; | |
| 38 if (m_dimension < 21 || (m_dimension & 0x03) != 1) { | |
| 39 e = BCExceptionRead; | |
| 40 BC_EXCEPTION_CHECK_ReturnVoid(e); | |
| 41 } | |
| 42 m_bitMatrix = m_tempBitMatrix; | |
| 43 m_parsedFormatInfo = NULL; | |
| 44 m_version = NULL; | |
| 45 } | |
| 46 CBC_QRBitMatrixParser::~CBC_QRBitMatrixParser() { | |
| 47 delete m_parsedFormatInfo; | |
| 48 } | |
| 49 CBC_QRCoderFormatInformation* CBC_QRBitMatrixParser::ReadFormatInformation( | |
| 50 int32_t& e) { | |
| 51 if (m_parsedFormatInfo) { | |
| 52 return m_parsedFormatInfo; | |
| 53 } | |
| 54 int32_t formatInfoBits = 0; | |
| 55 int32_t j; | |
| 56 for (j = 0; j < 6; j++) { | |
| 57 formatInfoBits = CopyBit(8, j, formatInfoBits); | |
| 58 } | |
| 59 formatInfoBits = CopyBit(8, 7, formatInfoBits); | |
| 60 formatInfoBits = CopyBit(8, 8, formatInfoBits); | |
| 61 formatInfoBits = CopyBit(7, 8, formatInfoBits); | |
| 62 for (int32_t i = 5; i >= 0; i--) { | |
| 63 formatInfoBits = CopyBit(i, 8, formatInfoBits); | |
| 64 } | |
| 65 m_parsedFormatInfo = | |
| 66 CBC_QRCoderFormatInformation::DecodeFormatInformation(formatInfoBits); | |
| 67 if (m_parsedFormatInfo) { | |
| 68 return m_parsedFormatInfo; | |
| 69 } | |
| 70 int32_t dimension = m_bitMatrix->GetDimension(e); | |
| 71 BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
| 72 formatInfoBits = 0; | |
| 73 int32_t iMin = dimension - 8; | |
| 74 for (j = dimension - 1; j >= iMin; j--) { | |
| 75 formatInfoBits = CopyBit(j, 8, formatInfoBits); | |
| 76 } | |
| 77 for (int32_t k = dimension - 7; k < dimension; k++) { | |
| 78 formatInfoBits = CopyBit(8, k, formatInfoBits); | |
| 79 } | |
| 80 m_parsedFormatInfo = | |
| 81 CBC_QRCoderFormatInformation::DecodeFormatInformation(formatInfoBits); | |
| 82 if (m_parsedFormatInfo) { | |
| 83 return m_parsedFormatInfo; | |
| 84 } | |
| 85 e = BCExceptionRead; | |
| 86 BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
| 87 return NULL; | |
| 88 } | |
| 89 CBC_QRCoderVersion* CBC_QRBitMatrixParser::ReadVersion(int32_t& e) { | |
| 90 if (m_version) { | |
| 91 return m_version; | |
| 92 } | |
| 93 int32_t dimension = m_bitMatrix->GetDimension(e); | |
| 94 BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
| 95 int32_t provisionVersion = (dimension - 17) >> 2; | |
| 96 if (provisionVersion <= 6) { | |
| 97 CBC_QRCoderVersion* qrv = | |
| 98 CBC_QRCoderVersion::GetVersionForNumber(provisionVersion, e); | |
| 99 BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
| 100 return qrv; | |
| 101 } | |
| 102 int32_t versionBits = 0; | |
| 103 for (int32_t i = 5; i >= 0; i--) { | |
| 104 int32_t jMin = dimension - 11; | |
| 105 for (int32_t j = dimension - 9; j >= jMin; j--) { | |
| 106 versionBits = CopyBit(i, j, versionBits); | |
| 107 } | |
| 108 } | |
| 109 m_version = CBC_QRCoderVersion::DecodeVersionInformation(versionBits, e); | |
| 110 BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
| 111 if (m_version && m_version->GetDimensionForVersion() == dimension) { | |
| 112 return m_version; | |
| 113 } | |
| 114 versionBits = 0; | |
| 115 for (int32_t j = 5; j >= 0; j--) { | |
| 116 int32_t iMin = dimension - 11; | |
| 117 for (int32_t i = dimension - 9; i >= iMin; i--) { | |
| 118 versionBits = CopyBit(i, j, versionBits); | |
| 119 } | |
| 120 } | |
| 121 m_version = CBC_QRCoderVersion::DecodeVersionInformation(versionBits, e); | |
| 122 BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
| 123 if (m_version && m_version->GetDimensionForVersion() == dimension) { | |
| 124 return m_version; | |
| 125 } | |
| 126 e = BCExceptionRead; | |
| 127 BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
| 128 return NULL; | |
| 129 } | |
| 130 int32_t CBC_QRBitMatrixParser::CopyBit(int32_t i, | |
| 131 int32_t j, | |
| 132 int32_t versionBits) { | |
| 133 return m_bitMatrix->Get(j, i) ? (versionBits << 1) | 0x1 : versionBits << 1; | |
| 134 } | |
| 135 CFX_ByteArray* CBC_QRBitMatrixParser::ReadCodewords(int32_t& e) { | |
| 136 CBC_QRCoderFormatInformation* formatInfo = ReadFormatInformation(e); | |
| 137 BC_EXCEPTION_CHECK_ReturnValue(e, NULL) CBC_QRCoderVersion* version = | |
| 138 ReadVersion(e); | |
| 139 BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
| 140 CBC_QRDataMask* dataMask = | |
| 141 CBC_QRDataMask::ForReference((int32_t)(formatInfo->GetDataMask()), e); | |
| 142 BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
| 143 int32_t dimension = m_bitMatrix->GetDimension(e); | |
| 144 BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
| 145 dataMask->UnmaskBitMatirx(m_bitMatrix, dimension); | |
| 146 std::unique_ptr<CBC_CommonBitMatrix> functionPattern( | |
| 147 version->BuildFunctionPattern(e)); | |
| 148 BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
| 149 FX_BOOL readingUp = TRUE; | |
| 150 std::unique_ptr<CFX_ByteArray> result(new CFX_ByteArray); | |
| 151 result->SetSize(version->GetTotalCodeWords()); | |
| 152 int32_t resultOffset = 0; | |
| 153 int32_t currentByte = 0; | |
| 154 int32_t bitsRead = 0; | |
| 155 for (int32_t j = dimension - 1; j > 0; j -= 2) { | |
| 156 if (j == 6) { | |
| 157 j--; | |
| 158 } | |
| 159 for (int32_t count = 0; count < dimension; count++) { | |
| 160 int32_t i = readingUp ? dimension - 1 - count : count; | |
| 161 for (int32_t col = 0; col < 2; col++) { | |
| 162 if (!functionPattern->Get(j - col, i)) { | |
| 163 bitsRead++; | |
| 164 currentByte <<= 1; | |
| 165 if (m_bitMatrix->Get(j - col, i)) { | |
| 166 currentByte |= 1; | |
| 167 } | |
| 168 if (bitsRead == 8) { | |
| 169 (*result)[resultOffset++] = (uint8_t)currentByte; | |
| 170 bitsRead = 0; | |
| 171 currentByte = 0; | |
| 172 } | |
| 173 } | |
| 174 } | |
| 175 } | |
| 176 readingUp ^= TRUE; | |
| 177 } | |
| 178 if (resultOffset != version->GetTotalCodeWords()) { | |
| 179 e = BCExceptionRead; | |
| 180 BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
| 181 } | |
| 182 return result.release(); | |
| 183 } | |
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