added qr code reader
nymea
bernhard.trinnes
parent
73055830b8
commit
9ef3674dba
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@ -2,12 +2,16 @@ include(../plugins.pri)
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QT += network
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LIBS += -lzbar
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TARGET = $$qtLibraryTarget(nymea_deviceplugindoorbird)
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SOURCES += \
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deviceplugindoorbird.cpp \
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doorbird.cpp
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doorbird.cpp \
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qrcodereader.cpp \
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HEADERS += \
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deviceplugindoorbird.h \
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doorbird.h
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doorbird.h \
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qrcodereader.h \
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@ -0,0 +1,189 @@
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/*****************************************************************************
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* Copyright: 2013 Michael Zanetti <michael_zanetti@gmx.net> *
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* *
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* This file is part of ubuntu-authenticator *
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* *
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* This prject is free software: you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation, either version 3 of the License, or *
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* (at your option) any later version. *
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* *
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* This project is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program. If not, see <http://www.gnu.org/licenses/>. *
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* *
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****************************************************************************/
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#include "qrcodereader.h"
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#include <QDebug>
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#include <QUrlQuery>
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#include <QSettings>
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#include <QStandardPaths>
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QRCodeReader::QRCodeReader(QObject *parent) :
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QObject(parent)
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{
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connect(&m_readerThread, &QThread::started, this, &QRCodeReader::scanningChanged);
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connect(&m_readerThread, &QThread::finished, this, &QRCodeReader::scanningChanged);
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}
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bool QRCodeReader::valid() const
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{
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return !m_type.isEmpty() && !m_text.isEmpty();
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}
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QString QRCodeReader::type() const
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{
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return m_type;
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}
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QString QRCodeReader::text() const
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{
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return m_text;
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}
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QImage QRCodeReader::image() const
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{
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return m_image;
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}
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QRect QRCodeReader::scanRect() const
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{
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return m_scanRect;
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}
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void QRCodeReader::setScanRect(const QRect &rect)
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{
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if (m_scanRect != rect) {
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m_scanRect = rect;
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emit scanRectChanged();
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}
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}
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bool QRCodeReader::scanning() const
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{
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return m_readerThread.isRunning();
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}
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void QRCodeReader::grab(QImage image)
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{
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m_type.clear();
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m_text.clear();
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emit validChanged();
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if (m_scanRect.isValid()) {
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image = image.copy(m_scanRect);
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}
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Reader *reader = new Reader;
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reader->moveToThread(&m_readerThread);
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connect(reader, SIGNAL(finished()), reader, SLOT(deleteLater()));
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connect(reader, SIGNAL(finished()), &m_readerThread, SLOT(quit()));
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connect(reader, SIGNAL(resultReady(QString, QString, QImage)), this, SLOT(handleResults(QString, QString, QImage)));
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m_readerThread.start();
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QMetaObject::invokeMethod(reader, "doWork", Q_ARG(QImage, img), Q_ARG(bool, false));
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}
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void QRCodeReader::processImage(const QUrl &url)
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{
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QImage image;
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if (!image.load(url.path())) {
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qWarning() << "can't open" << url.path();
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return;
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}
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Reader *reader = new Reader;
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reader->moveToThread(&m_readerThread);
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connect(reader, SIGNAL(finished()), reader, SLOT(deleteLater()));
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connect(reader, SIGNAL(finished()), &m_readerThread, SLOT(quit()));
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connect(reader, SIGNAL(resultReady(QString, QString, QImage)), this, SLOT(handleResults(QString, QString, QImage)));
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m_readerThread.start();
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QMetaObject::invokeMethod(reader, "doWork", Q_ARG(QImage, image), Q_ARG(bool, false));
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}
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void QRCodeReader::handleResults(const QString &type, const QString &text, const QImage &codeImage)
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{
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m_type = type;
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m_text = text;
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m_image = codeImage;
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m_imageUuid = QUuid::createUuid();
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emit validChanged();
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}
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void Reader::doWork(const QImage &image, bool invert)
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{
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// Prepare image
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QImage copy = image;
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if (invert) {
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copy.invertPixels();
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}
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zbar::QZBarImage img(copy.convertToFormat(QImage::Format_RGB32));
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zbar::Image tmp = img.convert(*(long*)"Y800");
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// create a reader
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zbar::ImageScanner scanner;
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// configure the reader
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scanner.set_config(zbar::ZBAR_NONE, zbar::ZBAR_CFG_ENABLE, 1);
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scanner.set_config(zbar::ZBAR_NONE, zbar::ZBAR_CFG_POSITION, 1);
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scanner.set_config(zbar::ZBAR_PARTIAL, zbar::ZBAR_CFG_ENABLE, 0);
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// scan the image for barcodes
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int n = scanner.scan(tmp);
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// qDebug() << "scanned. have" << n << "symbols";
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if (!invert && n == 0) {
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// Nothing found... try again inverted
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doWork(image, true);
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return;
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}
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img.set_symbols(tmp.get_symbols());
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// extract results
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for(zbar::Image::SymbolIterator symbol = img.symbol_begin(); symbol != img.symbol_end(); ++symbol) {
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QString typeName = QString::fromStdString(symbol->get_type_name());
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QString symbolString = QString::fromStdString(symbol->get_data());
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int x0 = 999999;
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int y0 = 999999;
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int x1 = 0;
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int y1 = 0;
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for (int i = 0; i < symbol->get_location_size(); ++i) {
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int x = symbol->get_location_x(i);
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int y = symbol->get_location_y(i);
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qDebug() << "got point" << x << y;
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if (x < x0) x0 = x;
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if (y < y0) y0 = y;
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if (x > x1) x1 = x;
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if (y > y1) y1 = y;
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}
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int width = x1 - x0;
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int height = y1 - y0;
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// Workaround for zBar sometimes only giving us the first bar in a barcode.
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if (width < 10) width = img.get_width() - x0;
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if (height < 10) height = img.get_height() - y0;
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qDebug() << "extracting code image (" << x0 << y0 << ") ("<< x1 << y1 << ")";
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QImage codeImage = image.copy(x0, y0, width, height);
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qDebug() << "Code recognized:" << typeName << ", Text:" << symbolString;
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emit resultReady(typeName, symbolString, codeImage);
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}
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tmp.set_data(NULL, 0);
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img.set_data(NULL, 0);
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emit finished();
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}
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@ -0,0 +1,88 @@
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/*****************************************************************************
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* Copyright: 2013 Michael Zanetti <michael_zanetti@gmx.net> *
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* *
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* This file is part of tagger *
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* *
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* This prject is free software: you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation, either version 3 of the License, or *
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* (at your option) any later version. *
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* *
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* This project is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program. If not, see <http://www.gnu.org/licenses/>. *
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* *
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****************************************************************************/
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#ifndef QRCODEREADER_H
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#define QRCODEREADER_H
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#include <QObject>
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#include <QThread>
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#include <QUuid>
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#include <QImage>
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class QRCodeReader : public QObject
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{
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Q_OBJECT
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Q_PROPERTY(bool valid READ valid NOTIFY validChanged)
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Q_PROPERTY(QString type READ type NOTIFY validChanged)
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Q_PROPERTY(QString text READ text NOTIFY validChanged)
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Q_PROPERTY(QImage image READ image NOTIFY validChanged)
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Q_PROPERTY(QString imageSource READ imageSource NOTIFY validChanged)
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Q_PROPERTY(QRect scanRect READ scanRect WRITE setScanRect NOTIFY scanRectChanged)
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Q_PROPERTY(bool scanning READ scanning NOTIFY scanningChanged)
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Q_PROPERTY(HistoryModel* history READ history CONSTANT)
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public:
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explicit QRCodeReader(QObject *parent = nullptr);
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bool valid() const;
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QString type() const;
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QString text() const;
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QImage image() const;
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QString imageSource() const;
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QRect scanRect() const;
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void setScanRect(const QRect &rect);
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bool scanning() const;
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public slots:
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void grab(QImage image);
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void processImage(const QUrl &url);
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signals:
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void validChanged();
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void scanRectChanged();
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void scanningChanged();
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private slots:
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void handleResults(const QString &type, const QString &text, const QImage &codeImage);
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private:
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QString m_type;
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QString m_text;
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QImage m_image;
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QUuid m_imageUuid;
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QRect m_scanRect;
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QThread m_readerThread;
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};
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class Reader : public QObject
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{
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Q_OBJECT
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public slots:
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void doWork(const QImage &image, bool invert);
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signals:
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void resultReady(const QString &type, const QString &text, const QImage &codeImage);
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void finished();
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};
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#endif // QRCODEREADER_H
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