diff options
Diffstat (limited to 'xfa/fxbarcode/oned/BC_OnedCodaBarReader.cpp')
| -rw-r--r-- | xfa/fxbarcode/oned/BC_OnedCodaBarReader.cpp | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/xfa/fxbarcode/oned/BC_OnedCodaBarReader.cpp b/xfa/fxbarcode/oned/BC_OnedCodaBarReader.cpp new file mode 100644 index 0000000000..27f2191eac --- /dev/null +++ b/xfa/fxbarcode/oned/BC_OnedCodaBarReader.cpp @@ -0,0 +1,212 @@ +// 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/fxbarcode/oned/BC_OnedCodaBarReader.h" + +#include <algorithm> +#include <memory> + +#include "core/include/fxcrt/fx_basic.h" +#include "xfa/fxbarcode/BC_Reader.h" +#include "xfa/fxbarcode/common/BC_CommonBitArray.h" +#include "xfa/fxbarcode/oned/BC_OneDReader.h" +#include "xfa/fxbarcode/oned/BC_OnedCode39Reader.h" +#include "xfa/fxbarcode/utils.h" + +const FX_CHAR* CBC_OnedCodaBarReader::ALPHABET_STRING = + "0123456789-$:/.+ABCDTN"; +const int32_t CBC_OnedCodaBarReader::CHARACTER_ENCODINGS[22] = { + 0x003, 0x006, 0x009, 0x060, 0x012, 0x042, 0x021, 0x024, + 0x030, 0x048, 0x00c, 0x018, 0x045, 0x051, 0x054, 0x015, + 0x01A, 0x029, 0x00B, 0x00E, 0x01A, 0x029}; +const FX_CHAR CBC_OnedCodaBarReader::STARTEND_ENCODING[8] = { + 'E', '*', 'A', 'B', 'C', 'D', 'T', 'N'}; + +CBC_OnedCodaBarReader::CBC_OnedCodaBarReader() {} +CBC_OnedCodaBarReader::~CBC_OnedCodaBarReader() {} +CFX_ByteString CBC_OnedCodaBarReader::DecodeRow(int32_t rowNumber, + CBC_CommonBitArray* row, + int32_t hints, + int32_t& e) { + std::unique_ptr<CFX_Int32Array> start(FindAsteriskPattern(row, e)); + BC_EXCEPTION_CHECK_ReturnValue(e, ""); + (*start)[1] = 0; + int32_t nextStart = (*start)[1]; + int32_t end = row->GetSize(); + while (nextStart < end && !row->Get(nextStart)) { + nextStart++; + } + CFX_ByteString result; + CFX_Int32Array counters; + counters.SetSize(7); + FX_CHAR decodedChar; + int32_t lastStart; + do { + RecordPattern(row, nextStart, &counters, e); + BC_EXCEPTION_CHECK_ReturnValue(e, ""); + decodedChar = ToNarrowWidePattern(&counters); + if (decodedChar == '!') { + e = BCExceptionNotFound; + return ""; + } + result += decodedChar; + lastStart = nextStart; + for (int32_t i = 0; i < counters.GetSize(); i++) { + nextStart += counters[i]; + } + while (nextStart < end && !row->Get(nextStart)) { + nextStart++; + } + } while (nextStart < end); + int32_t lastPatternSize = 0; + for (int32_t j = 0; j < counters.GetSize(); j++) { + lastPatternSize += counters[j]; + } + int32_t whiteSpaceAfterEnd = nextStart - lastStart - lastPatternSize; + if (nextStart != end && (whiteSpaceAfterEnd / 2 < lastPatternSize)) { + e = BCExceptionNotFound; + return ""; + } + if (result.GetLength() < 2) { + e = BCExceptionNotFound; + return ""; + } + FX_CHAR startchar = result[0]; + if (!ArrayContains(STARTEND_ENCODING, startchar)) { + e = BCExceptionNotFound; + return ""; + } + int32_t len = result.GetLength(); + CFX_ByteString temp = result; + for (int32_t k = 1; k < result.GetLength(); k++) { + if (ArrayContains(STARTEND_ENCODING, result[k])) { + if ((k + 1) != result.GetLength()) { + result.Delete(1, k); + k = 1; + } + } + } + if (result.GetLength() < 5) { + int32_t index = temp.Find(result.Mid(1, result.GetLength() - 1)); + if (index == len - (result.GetLength() - 1)) { + e = BCExceptionNotFound; + return ""; + } + } + if (result.GetLength() > minCharacterLength) { + result = result.Mid(1, result.GetLength() - 2); + } else { + e = BCExceptionNotFound; + return ""; + } + return result; +} +CFX_Int32Array* CBC_OnedCodaBarReader::FindAsteriskPattern( + CBC_CommonBitArray* row, + int32_t& e) { + int32_t width = row->GetSize(); + int32_t rowOffset = 0; + while (rowOffset < width) { + if (row->Get(rowOffset)) { + break; + } + rowOffset++; + } + int32_t counterPosition = 0; + CFX_Int32Array counters; + counters.SetSize(7); + int32_t patternStart = rowOffset; + FX_BOOL isWhite = FALSE; + int32_t patternLength = counters.GetSize(); + for (int32_t i = rowOffset; i < width; i++) { + FX_BOOL pixel = row->Get(i); + if (pixel ^ isWhite) { + counters[counterPosition]++; + } else { + if (counterPosition == patternLength - 1) { + if (ArrayContains(STARTEND_ENCODING, ToNarrowWidePattern(&counters))) { + FX_BOOL btemp3 = + row->IsRange(std::max(0, patternStart - (i - patternStart) / 2), + patternStart, FALSE, e); + BC_EXCEPTION_CHECK_ReturnValue(e, NULL); + if (btemp3) { + CFX_Int32Array* result = new CFX_Int32Array(); + result->SetSize(2); + (*result)[0] = patternStart; + (*result)[1] = i; + 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; + return NULL; +} +FX_BOOL CBC_OnedCodaBarReader::ArrayContains(const FX_CHAR array[], + FX_CHAR key) { + for (int32_t i = 0; i < 8; i++) { + if (array[i] == key) { + return TRUE; + } + } + return FALSE; +} +FX_CHAR CBC_OnedCodaBarReader::ToNarrowWidePattern(CFX_Int32Array* counter) { + int32_t numCounters = counter->GetSize(); + if (numCounters < 1) { + return '!'; + } + int32_t averageCounter = 0; + int32_t totalCounters = 0; + for (int32_t i = 0; i < numCounters; i++) { + totalCounters += (*counter)[i]; + } + averageCounter = totalCounters / numCounters; + int32_t pattern = 0; + int32_t wideCounters = 0; + for (int32_t j = 0; j < numCounters; j++) { + if ((*counter)[j] > averageCounter) { + pattern |= 1 << (numCounters - 1 - j); + wideCounters++; + } + } + if ((wideCounters == 2) || (wideCounters == 3)) { + for (int32_t k = 0; k < 22; k++) { + if (CHARACTER_ENCODINGS[k] == pattern) { + return (ALPHABET_STRING)[k]; + } + } + } + return '!'; +} |