74 lines
2.4 KiB
C++
74 lines
2.4 KiB
C++
/*
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* Kaidan - A user-friendly XMPP client for every device!
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*
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* Copyright (C) 2016-2021 Kaidan developers and contributors
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* (see the LICENSE file for a full list of copyright authors)
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*
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* Kaidan 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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* In addition, as a special exception, the author of Kaidan gives
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* permission to link the code of its release with the OpenSSL
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* project's "OpenSSL" library (or with modified versions of it that
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* use the same license as the "OpenSSL" library), and distribute the
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* linked executables. You must obey the GNU General Public License in
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* all respects for all of the code used other than "OpenSSL". If you
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* modify this file, you may extend this exception to your version of
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* the file, but you are not obligated to do so. If you do not wish to
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* do so, delete this exception statement from your version.
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*
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* Kaidan 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 Kaidan. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <QObject>
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/**
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* Decoder for QR codes. This is a backend for \c QrCodeScanner .
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*/
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class QrCodeDecoder : public QObject
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{
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Q_OBJECT
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public:
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/**
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* Instantiates a QR code decoder.
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*
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* @param parent parent object
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*/
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explicit QrCodeDecoder(QObject *parent = nullptr);
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signals:
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/**
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* Emitted when the decoding failed.
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*/
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void decodingFailed();
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/**
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* Emitted when the decoding succeeded.
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*
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* @param tag string which was decoded by the QR code decoder
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*/
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void decodingSucceeded(const QString &tag);
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public slots:
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/**
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* Tries to decode the QR code from the given image. When decoding has
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* finished @c decodingFinished() will be emitted. In case a QR code was found,
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* also @c tagFound() will be emitted.
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*
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* @param image image which may contain a QR code to decode to a string.
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* It needs to be in grayscale format (one byte per pixel).
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*/
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void decodeImage(const QImage &image);
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};
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