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// 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 "../barcode.h"
#include "../BC_Reader.h"
#include "../common/BC_CommonBitArray.h"
#include "../oned/BC_OneDReader.h"
#include "../oned/BC_OnedCode39Reader.h"
#include "../oned/BC_OnedCodaBarReader.h"
FX_LPCSTR CBC_OnedCodaBarReader::ALPHABET_STRING = "0123456789-$:/.+ABCDTN";
const FX_INT32 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_INT32 CBC_OnedCodaBarReader::minCharacterLength = 3;
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(FX_INT32 rowNumber, CBC_CommonBitArray *row, FX_INT32 hints, FX_INT32 &e)
{
CFX_Int32Array *int32Ptr = FindAsteriskPattern(row, e);
BC_EXCEPTION_CHECK_ReturnValue(e, "");
CBC_AutoPtr<CFX_Int32Array> start(int32Ptr);
(*start)[1] = 0;
FX_INT32 nextStart = (*start)[1];
FX_INT32 end = row->GetSize();
while (nextStart < end && !row->Get(nextStart)) {
nextStart++;
}
CFX_ByteString result;
CFX_Int32Array counters;
counters.SetSize(7);
FX_CHAR decodedChar;
FX_INT32 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 (FX_INT32 i = 0; i < counters.GetSize(); i++) {
nextStart += counters[i];
}
while (nextStart < end && !row->Get(nextStart)) {
nextStart++;
}
} while (nextStart < end);
FX_INT32 lastPatternSize = 0;
for (FX_INT32 j = 0; j < counters.GetSize(); j++) {
lastPatternSize += counters[j];
}
FX_INT32 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 "";
}
FX_INT32 len = result.GetLength();
CFX_ByteString temp = result;
for (FX_INT32 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) {
FX_INT32 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, FX_INT32 &e)
{
FX_INT32 width = row->GetSize();
FX_INT32 rowOffset = 0;
while (rowOffset < width) {
if (row->Get(rowOffset)) {
break;
}
rowOffset++;
}
FX_INT32 counterPosition = 0;
CFX_Int32Array counters;
counters.SetSize(7);
FX_INT32 patternStart = rowOffset;
FX_BOOL isWhite = FALSE;
FX_INT32 patternLength = counters.GetSize();
for (FX_INT32 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(FX_MAX(0, patternStart - (i - patternStart) / 2), patternStart, FALSE, e);
BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
if (btemp3) {
CFX_Int32Array *result = FX_NEW CFX_Int32Array();
result->SetSize(2);
(*result)[0] = patternStart;
(*result)[1] = i;
return result;
}
}
patternStart += counters[0] + counters[1];
for (FX_INT32 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(FX_INT32 i = 0; i < 8; i++) {
if(array[i] == key) {
return TRUE;
}
}
return FALSE;
}
FX_CHAR CBC_OnedCodaBarReader::ToNarrowWidePattern(CFX_Int32Array *counter)
{
FX_INT32 numCounters = counter->GetSize();
if (numCounters < 1) {
return '!';
}
FX_INT32 averageCounter = 0;
FX_INT32 totalCounters = 0;
for (FX_INT32 i = 0; i < numCounters; i++) {
totalCounters += (*counter)[i];
}
averageCounter = totalCounters / numCounters;
FX_INT32 pattern = 0;
FX_INT32 wideCounters = 0;
for (FX_INT32 j = 0; j < numCounters; j++) {
if ((*counter)[j] > averageCounter) {
pattern |= 1 << (numCounters - 1 - j);
wideCounters++;
}
}
if ((wideCounters == 2) || (wideCounters == 3)) {
for (FX_INT32 k = 0; k < 22; k++) {
if (CHARACTER_ENCODINGS[k] == pattern) {
return (ALPHABET_STRING)[k];
}
}
}
return '!';
}
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