blob: b5f5aa5fe475155715b9bcf8c7bec8d96c77a06f [file] [log] [blame] [edit]
// 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, NULL);
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 NULL;
}
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;
} else {
e = BCExceptionNotFound;
return 0;
}
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 = NULL;
}
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 = NULL;
}
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;
}