| // 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 <algorithm> |
| |
| #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_OnedCode128Reader.h" |
| #include "xfa/fxbarcode/utils.h" |
| |
| const int32_t CBC_OnedCode128Reader::CODE_PATTERNS[107][7] = { |
| {2, 1, 2, 2, 2, 2, 0}, {2, 2, 2, 1, 2, 2, 0}, {2, 2, 2, 2, 2, 1, 0}, |
| {1, 2, 1, 2, 2, 3, 0}, {1, 2, 1, 3, 2, 2, 0}, {1, 3, 1, 2, 2, 2, 0}, |
| {1, 2, 2, 2, 1, 3, 0}, {1, 2, 2, 3, 1, 2, 0}, {1, 3, 2, 2, 1, 2, 0}, |
| {2, 2, 1, 2, 1, 3, 0}, {2, 2, 1, 3, 1, 2, 0}, {2, 3, 1, 2, 1, 2, 0}, |
| {1, 1, 2, 2, 3, 2, 0}, {1, 2, 2, 1, 3, 2, 0}, {1, 2, 2, 2, 3, 1, 0}, |
| {1, 1, 3, 2, 2, 2, 0}, {1, 2, 3, 1, 2, 2, 0}, {1, 2, 3, 2, 2, 1, 0}, |
| {2, 2, 3, 2, 1, 1, 0}, {2, 2, 1, 1, 3, 2, 0}, {2, 2, 1, 2, 3, 1, 0}, |
| {2, 1, 3, 2, 1, 2, 0}, {2, 2, 3, 1, 1, 2, 0}, {3, 1, 2, 1, 3, 1, 0}, |
| {3, 1, 1, 2, 2, 2, 0}, {3, 2, 1, 1, 2, 2, 0}, {3, 2, 1, 2, 2, 1, 0}, |
| {3, 1, 2, 2, 1, 2, 0}, {3, 2, 2, 1, 1, 2, 0}, {3, 2, 2, 2, 1, 1, 0}, |
| {2, 1, 2, 1, 2, 3, 0}, {2, 1, 2, 3, 2, 1, 0}, {2, 3, 2, 1, 2, 1, 0}, |
| {1, 1, 1, 3, 2, 3, 0}, {1, 3, 1, 1, 2, 3, 0}, {1, 3, 1, 3, 2, 1, 0}, |
| {1, 1, 2, 3, 1, 3, 0}, {1, 3, 2, 1, 1, 3, 0}, {1, 3, 2, 3, 1, 1, 0}, |
| {2, 1, 1, 3, 1, 3, 0}, {2, 3, 1, 1, 1, 3, 0}, {2, 3, 1, 3, 1, 1, 0}, |
| {1, 1, 2, 1, 3, 3, 0}, {1, 1, 2, 3, 3, 1, 0}, {1, 3, 2, 1, 3, 1, 0}, |
| {1, 1, 3, 1, 2, 3, 0}, {1, 1, 3, 3, 2, 1, 0}, {1, 3, 3, 1, 2, 1, 0}, |
| {3, 1, 3, 1, 2, 1, 0}, {2, 1, 1, 3, 3, 1, 0}, {2, 3, 1, 1, 3, 1, 0}, |
| {2, 1, 3, 1, 1, 3, 0}, {2, 1, 3, 3, 1, 1, 0}, {2, 1, 3, 1, 3, 1, 0}, |
| {3, 1, 1, 1, 2, 3, 0}, {3, 1, 1, 3, 2, 1, 0}, {3, 3, 1, 1, 2, 1, 0}, |
| {3, 1, 2, 1, 1, 3, 0}, {3, 1, 2, 3, 1, 1, 0}, {3, 3, 2, 1, 1, 1, 0}, |
| {3, 1, 4, 1, 1, 1, 0}, {2, 2, 1, 4, 1, 1, 0}, {4, 3, 1, 1, 1, 1, 0}, |
| {1, 1, 1, 2, 2, 4, 0}, {1, 1, 1, 4, 2, 2, 0}, {1, 2, 1, 1, 2, 4, 0}, |
| {1, 2, 1, 4, 2, 1, 0}, {1, 4, 1, 1, 2, 2, 0}, {1, 4, 1, 2, 2, 1, 0}, |
| {1, 1, 2, 2, 1, 4, 0}, {1, 1, 2, 4, 1, 2, 0}, {1, 2, 2, 1, 1, 4, 0}, |
| {1, 2, 2, 4, 1, 1, 0}, {1, 4, 2, 1, 1, 2, 0}, {1, 4, 2, 2, 1, 1, 0}, |
| {2, 4, 1, 2, 1, 1, 0}, {2, 2, 1, 1, 1, 4, 0}, {4, 1, 3, 1, 1, 1, 0}, |
| {2, 4, 1, 1, 1, 2, 0}, {1, 3, 4, 1, 1, 1, 0}, {1, 1, 1, 2, 4, 2, 0}, |
| {1, 2, 1, 1, 4, 2, 0}, {1, 2, 1, 2, 4, 1, 0}, {1, 1, 4, 2, 1, 2, 0}, |
| {1, 2, 4, 1, 1, 2, 0}, {1, 2, 4, 2, 1, 1, 0}, {4, 1, 1, 2, 1, 2, 0}, |
| {4, 2, 1, 1, 1, 2, 0}, {4, 2, 1, 2, 1, 1, 0}, {2, 1, 2, 1, 4, 1, 0}, |
| {2, 1, 4, 1, 2, 1, 0}, {4, 1, 2, 1, 2, 1, 0}, {1, 1, 1, 1, 4, 3, 0}, |
| {1, 1, 1, 3, 4, 1, 0}, {1, 3, 1, 1, 4, 1, 0}, {1, 1, 4, 1, 1, 3, 0}, |
| {1, 1, 4, 3, 1, 1, 0}, {4, 1, 1, 1, 1, 3, 0}, {4, 1, 1, 3, 1, 1, 0}, |
| {1, 1, 3, 1, 4, 1, 0}, {1, 1, 4, 1, 3, 1, 0}, {3, 1, 1, 1, 4, 1, 0}, |
| {4, 1, 1, 1, 3, 1, 0}, {2, 1, 1, 4, 1, 2, 0}, {2, 1, 1, 2, 1, 4, 0}, |
| {2, 1, 1, 2, 3, 2, 0}, {2, 3, 3, 1, 1, 1, 2}}; |
| |
| CBC_OnedCode128Reader::CBC_OnedCode128Reader() {} |
| CBC_OnedCode128Reader::~CBC_OnedCode128Reader() {} |
| CFX_Int32Array* CBC_OnedCode128Reader::FindStartPattern(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(6); |
| 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) { |
| int32_t bestVariance = MAX_AVG_VARIANCE; |
| int32_t bestMatch = -1; |
| for (int32_t startCode = CODE_START_A; startCode <= CODE_START_C; |
| startCode++) { |
| int32_t variance = PatternMatchVariance( |
| &counters, &CODE_PATTERNS[startCode][0], MAX_INDIVIDUAL_VARIANCE); |
| if (variance < bestVariance) { |
| bestVariance = variance; |
| bestMatch = startCode; |
| } |
| } |
| if (bestMatch >= 0) { |
| FX_BOOL btemp2 = |
| row->IsRange(std::max(0, patternStart - (i - patternStart) / 2), |
| patternStart, FALSE, e); |
| BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); |
| if (btemp2) { |
| CFX_Int32Array* result = new CFX_Int32Array; |
| result->SetSize(3); |
| (*result)[0] = patternStart; |
| (*result)[1] = i; |
| (*result)[2] = bestMatch; |
| 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 nullptr; |
| } |
| int32_t CBC_OnedCode128Reader::DecodeCode(CBC_CommonBitArray* row, |
| CFX_Int32Array* counters, |
| int32_t rowOffset, |
| int32_t& e) { |
| RecordPattern(row, rowOffset, counters, e); |
| BC_EXCEPTION_CHECK_ReturnValue(e, 0); |
| int32_t bestVariance = MAX_AVG_VARIANCE; |
| int32_t bestMatch = -1; |
| for (int32_t d = 0; d < 107; d++) { |
| int32_t variance = PatternMatchVariance(counters, &CODE_PATTERNS[d][0], |
| MAX_INDIVIDUAL_VARIANCE); |
| if (variance < bestVariance) { |
| bestVariance = variance; |
| bestMatch = d; |
| } |
| } |
| if (bestMatch >= 0) { |
| return bestMatch; |
| } |
| e = BCExceptionNotFound; |
| return 0; |
| } |
| CFX_ByteString CBC_OnedCode128Reader::DecodeRow(int32_t rowNumber, |
| CBC_CommonBitArray* row, |
| int32_t hints, |
| int32_t& e) { |
| CFX_Int32Array* startPatternInfo = FindStartPattern(row, e); |
| BC_EXCEPTION_CHECK_ReturnValue(e, ""); |
| int32_t startCode = (*startPatternInfo)[2]; |
| int32_t codeSet; |
| switch (startCode) { |
| case 103: |
| codeSet = CODE_CODE_A; |
| break; |
| case 104: |
| codeSet = CODE_CODE_B; |
| break; |
| case 105: |
| codeSet = CODE_CODE_C; |
| break; |
| default: |
| if (startPatternInfo) { |
| startPatternInfo->RemoveAll(); |
| delete startPatternInfo; |
| startPatternInfo = nullptr; |
| } |
| e = BCExceptionFormatException; |
| return ""; |
| } |
| FX_BOOL done = FALSE; |
| FX_BOOL isNextShifted = FALSE; |
| CFX_ByteString result; |
| int32_t lastStart = (*startPatternInfo)[0]; |
| int32_t nextStart = (*startPatternInfo)[1]; |
| if (startPatternInfo) { |
| startPatternInfo->RemoveAll(); |
| delete startPatternInfo; |
| startPatternInfo = nullptr; |
| } |
| CFX_Int32Array counters; |
| counters.SetSize(6); |
| int32_t lastCode = 0; |
| int32_t code = 0; |
| int32_t checksumTotal = startCode; |
| int32_t multiplier = 0; |
| FX_BOOL lastCharacterWasPrintable = TRUE; |
| while (!done) { |
| FX_BOOL unshift = isNextShifted; |
| isNextShifted = FALSE; |
| lastCode = code; |
| code = DecodeCode(row, &counters, nextStart, e); |
| BC_EXCEPTION_CHECK_ReturnValue(e, ""); |
| if (code != CODE_STOP) { |
| lastCharacterWasPrintable = TRUE; |
| } |
| if (code != CODE_STOP) { |
| multiplier++; |
| checksumTotal += multiplier * code; |
| } |
| lastStart = nextStart; |
| for (int32_t i = 0; i < counters.GetSize(); i++) { |
| nextStart += counters[i]; |
| } |
| switch (code) { |
| case 103: |
| case 104: |
| case 105: |
| e = BCExceptionFormatException; |
| return ""; |
| } |
| switch (codeSet) { |
| case 101: |
| if (code < 64) { |
| result += (FX_CHAR)(' ' + code); |
| } else if (code < 96) { |
| result += (FX_CHAR)(code - 64); |
| } else { |
| if (code != CODE_STOP) { |
| lastCharacterWasPrintable = FALSE; |
| } |
| switch (code) { |
| case 102: |
| case 97: |
| case 96: |
| case 101: |
| break; |
| case 98: |
| isNextShifted = TRUE; |
| codeSet = CODE_CODE_B; |
| break; |
| case 100: |
| codeSet = CODE_CODE_B; |
| break; |
| case 99: |
| codeSet = CODE_CODE_C; |
| break; |
| case 106: |
| done = TRUE; |
| break; |
| } |
| } |
| break; |
| case 100: |
| if (code < 96) { |
| result += (FX_CHAR)(' ' + code); |
| } else { |
| if (code != CODE_STOP) { |
| lastCharacterWasPrintable = FALSE; |
| } |
| switch (code) { |
| case 102: |
| case 97: |
| case 96: |
| case 100: |
| break; |
| case 98: |
| isNextShifted = TRUE; |
| codeSet = CODE_CODE_A; |
| break; |
| case 101: |
| codeSet = CODE_CODE_A; |
| break; |
| case 99: |
| codeSet = CODE_CODE_C; |
| break; |
| case 106: |
| done = TRUE; |
| break; |
| } |
| } |
| break; |
| case 99: |
| if (code < 100) { |
| if (code < 10) { |
| result += '0'; |
| } |
| FX_CHAR temp[128]; |
| // TODO(dsinclair): Should this be snprintf? |
| sprintf(temp, "%d", code); |
| result += temp; |
| } else { |
| if (code != CODE_STOP) { |
| lastCharacterWasPrintable = FALSE; |
| } |
| switch (code) { |
| case 102: |
| break; |
| case 101: |
| codeSet = CODE_CODE_A; |
| break; |
| case 100: |
| codeSet = CODE_CODE_B; |
| break; |
| case 106: |
| done = TRUE; |
| break; |
| } |
| } |
| break; |
| } |
| if (unshift) { |
| codeSet = codeSet == CODE_CODE_A ? CODE_CODE_B : CODE_CODE_A; |
| } |
| } |
| int32_t width = row->GetSize(); |
| while (nextStart < width && row->Get(nextStart)) { |
| nextStart++; |
| } |
| FX_BOOL boolT1 = row->IsRange( |
| nextStart, std::min(width, nextStart + (nextStart - lastStart) / 2), |
| FALSE, e); |
| BC_EXCEPTION_CHECK_ReturnValue(e, ""); |
| if (!boolT1) { |
| e = BCExceptionNotFound; |
| return ""; |
| } |
| checksumTotal -= multiplier * lastCode; |
| if (checksumTotal % 103 != lastCode) { |
| e = BCExceptionChecksumException; |
| return ""; |
| } |
| int32_t resultLength = result.GetLength(); |
| if (resultLength > 0 && lastCharacterWasPrintable) { |
| if (codeSet == CODE_CODE_C) { |
| result = result.Mid(0, result.GetLength() - 2); |
| } else { |
| result = result.Mid(0, result.GetLength() - 1); |
| } |
| } |
| if (result.GetLength() == 0) { |
| e = BCExceptionFormatException; |
| return ""; |
| } |
| return result; |
| } |
