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ZXingReader.cpp
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ZXingReader.cpp
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/*
* Copyright 2016 Nu-book Inc.
*
* 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 "ReadBarcode.h"
#include "TextUtfEncoding.h"
#include <iostream>
#include <cstring>
#include <string>
#include <algorithm>
#include <cctype>
#define STB_IMAGE_IMPLEMENTATION
#include "stb_image.h"
using namespace ZXing;
static void PrintUsage(const char* exePath)
{
std::cout << "Usage: " << exePath << " [-fast] [-rotate] [-format <FORMAT[,...]>] <png image path>\n"
<< " -fast Skip some lines/pixels during detection\n"
<< " -rotate Also try rotated image during detection\n"
<< " -format Only detect given format(s)\n"
<< " -ispure Assume the image contains only a 'pure'/perfect code\n"
<< "\n"
<< "Supported formats are:\n";
for (auto f : BarcodeFormats::all()) {
std::cout << " " << ToString(f) << "\n";
}
std::cout << "Formats can be lowercase, with or without underscore, separated by ',', '|' and/or ' '\n";
}
static bool ParseOptions(int argc, char* argv[], DecodeHints* hints, std::string* filePath)
{
hints->setTryHarder(true);
for (int i = 1; i < argc; ++i) {
if (strcmp(argv[i], "-fast") == 0) {
hints->setTryHarder(false);
}
else if (strcmp(argv[i], "-rotate") == 0) {
hints->setTryRotate(true);
}
else if (strcmp(argv[i], "-ispure") == 0) {
hints->setIsPure(true);
hints->setBinarizer(Binarizer::FixedThreshold);
}
else if (strcmp(argv[i], "-format") == 0) {
if (++i == argc)
return false;
try {
hints->setFormats(BarcodeFormatsFromString(argv[i]));
} catch (const std::exception& e) {
std::cerr << e.what() << "\n";
return false;
}
}
else {
*filePath = argv[i];
}
}
return !filePath->empty();
}
std::ostream& operator<<(std::ostream& os, const Position& points) {
for (const auto& p : points)
os << p.x << "x" << p.y << " ";
return os;
}
int main(int argc, char* argv[])
{
DecodeHints hints;
std::string filePath;
if (!ParseOptions(argc, argv, &hints, &filePath)) {
PrintUsage(argv[0]);
return -1;
}
int width, height, channels;
std::unique_ptr<stbi_uc, void(*)(void*)> buffer(stbi_load(filePath.c_str(), &width, &height, &channels, 4), stbi_image_free);
if (buffer == nullptr) {
std::cerr << "Failed to read image: " << filePath << "\n";
return -1;
}
auto result = ReadBarcode({buffer.get(), width, height, ImageFormat::RGBX}, hints);
std::cout << "Text: \"" << TextUtfEncoding::ToUtf8(result.text()) << "\"\n"
<< "Format: " << ToString(result.format()) << "\n"
<< "Position: " << result.position() << "\n"
<< "Rotation: " << result.orientation() << " deg\n"
<< "Error: " << ToString(result.status()) << "\n";
std::map<ResultMetadata::Key, const char*> keys = {{ResultMetadata::ERROR_CORRECTION_LEVEL, "EC Level: "},
{ResultMetadata::SUGGESTED_PRICE, "Price: "},
{ResultMetadata::ISSUE_NUMBER, "Issue #: "},
{ResultMetadata::POSSIBLE_COUNTRY, "Country: "},
{ResultMetadata::UPC_EAN_EXTENSION, "Extension:"}};
for (auto key : keys) {
auto value = TextUtfEncoding::ToUtf8(result.metadata().getString(key.first));
if (value.size())
std::cout << key.second << value << "\n";
}
return static_cast<int>(result.status());
}