2 * MultiFormatUPCEANReader.cpp
5 * Created by Lukasz Warchol on 10-01-25.
6 * Copyright 2010 ZXing authors All rights reserved.
8 * Licensed under the Apache License, Version 2.0 (the "License");
9 * you may not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
12 * http://www.apache.org/licenses/LICENSE-2.0
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
20 #include "MultiFormatUPCEANReader.h"
22 #include <zxing/oned/EAN13Reader.h>
23 #include <zxing/oned/EAN8Reader.h>
24 #include <zxing/oned/UPCEReader.h>
25 #include <zxing/oned/UPCAReader.h>
26 #include <zxing/oned/OneDResultPoint.h>
27 #include <zxing/common/Array.h>
28 #include <zxing/ReaderException.h>
34 MultiFormatUPCEANReader::MultiFormatUPCEANReader(DecodeHints hints) : readers() {
35 if (hints.containsFormat(BarcodeFormat_EAN_13)) {
36 readers.push_back(Ref<OneDReader>(new EAN13Reader()));
37 } else if (hints.containsFormat(BarcodeFormat_UPC_A)) {
38 readers.push_back(Ref<OneDReader>(new UPCAReader()));
40 if (hints.containsFormat(BarcodeFormat_EAN_8)) {
41 readers.push_back(Ref<OneDReader>(new EAN8Reader()));
43 if (hints.containsFormat(BarcodeFormat_UPC_E)) {
44 readers.push_back(Ref<OneDReader>(new UPCEReader()));
46 if (readers.size() == 0) {
47 readers.push_back(Ref<OneDReader>(new EAN13Reader()));
48 // UPC-A is covered by EAN-13
49 readers.push_back(Ref<OneDReader>(new EAN8Reader()));
50 readers.push_back(Ref<OneDReader>(new UPCEReader()));
54 Ref<Result> MultiFormatUPCEANReader::decodeRow(int rowNumber, Ref<BitArray> row){
55 // Compute this location once and reuse it on multiple implementations
56 int size = readers.size();
57 for (int i = 0; i < size; i++) {
58 Ref<OneDReader> reader = readers[i];
61 result = reader->decodeRow(rowNumber, row);//decodeRow(rowNumber, row, startGuardPattern);
62 } catch (ReaderException re) {
65 // Special case: a 12-digit code encoded in UPC-A is identical to a "0"
66 // followed by those 12 digits encoded as EAN-13. Each will recognize such a code,
67 // UPC-A as a 12-digit string and EAN-13 as a 13-digit string starting with "0".
68 // Individually these are correct and their readers will both read such a code
69 // and correctly call it EAN-13, or UPC-A, respectively.
71 // In this case, if we've been looking for both types, we'd like to call it
72 // a UPC-A code. But for efficiency we only run the EAN-13 decoder to also read
73 // UPC-A. So we special case it here, and convert an EAN-13 result to a UPC-A
74 // result if appropriate.
75 if (result->getBarcodeFormat() == BarcodeFormat_EAN_13) {
76 const std::string& text = (result->getText())->getText();
78 Ref<String> resultString(new String(text.substr(1)));
79 Ref<Result> res(new Result(resultString, result->getRawBytes(), result->getResultPoints(), BarcodeFormat_UPC_A));
85 throw ReaderException("No EAN code detected");