119 lines
3.0 KiB
C++

// vim: set tabstop=4 shiftwidth=4 expandtab:
/*
Gwenview: an image viewer
Copyright 2007 Aurélien Gâteau <agateau@kde.org>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
// Self
#include "exiv2imageloader.h"
// Qt
#include <QByteArray>
#include <QFile>
#include <QString>
// KF
// Exiv2
#include <exiv2/exiv2.hpp>
// Local
#include "gwenview_exiv2_debug.h"
namespace Gwenview
{
struct Exiv2ImageLoaderPrivate {
std::unique_ptr<Exiv2::Image> mImage;
QString mErrorMessage;
};
struct Exiv2LogHandler {
static void handleMessage(int level, const char *message)
{
switch (level) {
case Exiv2::LogMsg::debug:
qCDebug(GWENVIEW_EXIV2_LOG) << message;
break;
case Exiv2::LogMsg::info:
qCInfo(GWENVIEW_EXIV2_LOG) << message;
break;
case Exiv2::LogMsg::warn:
case Exiv2::LogMsg::error:
case Exiv2::LogMsg::mute:
qCWarning(GWENVIEW_EXIV2_LOG) << message;
break;
default:
qCWarning(GWENVIEW_EXIV2_LOG) << "unhandled log level" << level << message;
break;
}
}
Exiv2LogHandler()
{
Exiv2::LogMsg::setHandler(&Exiv2LogHandler::handleMessage);
}
};
Exiv2ImageLoader::Exiv2ImageLoader()
: d(new Exiv2ImageLoaderPrivate)
{
// This is a threadsafe way to ensure that we only register it once
static Exiv2LogHandler handler;
}
Exiv2ImageLoader::~Exiv2ImageLoader()
{
delete d;
}
bool Exiv2ImageLoader::load(const QString &filePath)
{
QByteArray filePathByteArray = QFile::encodeName(filePath);
try {
d->mImage.reset(Exiv2::ImageFactory::open(filePathByteArray.constData()).release());
d->mImage->readMetadata();
} catch (const Exiv2::Error &error) {
d->mErrorMessage = QString::fromUtf8(error.what());
return false;
}
return true;
}
bool Exiv2ImageLoader::load(const QByteArray &data)
{
try {
d->mImage.reset(Exiv2::ImageFactory::open((unsigned char *)data.constData(), data.size()).release());
d->mImage->readMetadata();
} catch (const Exiv2::Error &error) {
d->mErrorMessage = QString::fromUtf8(error.what());
return false;
}
return true;
}
QString Exiv2ImageLoader::errorMessage() const
{
return d->mErrorMessage;
}
std::unique_ptr<Exiv2::Image> Exiv2ImageLoader::popImage()
{
return std::move(d->mImage);
}
} // namespace