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290 | /* ============================================================
*
* This file is a part of digiKam project
* https://www.digikam.org
*
* Date : 2006-09-15
* Description : Exiv2 library interface.
* Embedded preview loading.
*
* SPDX-FileCopyrightText: 2006-2025 by Gilles Caulier <caulier dot gilles at gmail dot com>
* SPDX-FileCopyrightText: 2006-2013 by Marcel Wiesweg <marcel dot wiesweg at gmx dot de>
*
* SPDX-License-Identifier: GPL-2.0-or-later
*
* ============================================================ */
#include "metaengine_previews.h"
// Local includes
#include "digikam_debug.h"
#include "metaengine_p.h"
#if defined(Q_CC_CLANG)
# pragma clang diagnostic push
# pragma clang diagnostic ignored "-Wdeprecated-declarations"
#endif
namespace Digikam
{
class Q_DECL_HIDDEN MetaEnginePreviews::Private
{
public:
Private() = default;
~Private()
{
delete manager;
}
void load(Exiv2::Image::AutoPtr image_) // clazy:exclude=function-args-by-ref
{
QMutexLocker lock(&s_metaEngineMutex);
try
{
#if EXIV2_TEST_VERSION(0,27,99)
image = std::move(image_);
#else
image = image_;
#endif
image->readMetadata();
manager = new Exiv2::PreviewManager(*image);
Exiv2::PreviewPropertiesList props = manager->getPreviewProperties();
// reverse order of list, which is smallest-first
Exiv2::PreviewPropertiesList::reverse_iterator it;
for (it = props.rbegin() ; it != props.rend() ; ++it)
{
properties << *it;
}
}
catch (Exiv2::AnyError& e)
{
MetaEngine::Private::printExiv2ExceptionError(QLatin1String("Cannot load preview data with Exiv2:"), e);
}
catch (...)
{
qCCritical(DIGIKAM_METAENGINE_LOG) << "Default exception from Exiv2";
}
}
public:
Exiv2::Image::AutoPtr image;
Exiv2::PreviewManager* manager = nullptr;
QList<Exiv2::PreviewProperties> properties;
};
MetaEnginePreviews::MetaEnginePreviews(const QString& filePath)
: d(new Private)
{
QMutexLocker lock(&s_metaEngineMutex);
try
{
Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open(filePath.toUtf8().constData());<--- Shadow variable
#if EXIV2_TEST_VERSION(0,27,99)
d->load(std::move(image));
#else
d->load(image);
#endif
}
catch (Exiv2::AnyError& e)
{
MetaEngine::Private::printExiv2ExceptionError(QLatin1String("Cannot load metadata with Exiv2:"), e);
}
catch (...)
{
qCCritical(DIGIKAM_METAENGINE_LOG) << "Default exception from Exiv2";
}
}
MetaEnginePreviews::MetaEnginePreviews(const QByteArray& imgData)
: d(new Private)
{
QMutexLocker lock(&s_metaEngineMutex);
try
{
Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open(<--- Shadow variable
reinterpret_cast<Exiv2::byte*>(const_cast<char*>(imgData.data())), imgData.size());
#if EXIV2_TEST_VERSION(0,27,99)
d->load(std::move(image));
#else
d->load(image);
#endif
}
catch (Exiv2::AnyError& e)
{
MetaEngine::Private::printExiv2ExceptionError(QLatin1String("Cannot load metadata with Exiv2:"), e);
}
catch (...)
{
qCCritical(DIGIKAM_METAENGINE_LOG) << "Default exception from Exiv2";
}
}
MetaEnginePreviews::~MetaEnginePreviews()
{
delete d;
}
bool MetaEnginePreviews::isEmpty()
{
return d->properties.isEmpty();
}
QSize MetaEnginePreviews::originalSize() const
{
if (d->image.get())
{
return QSize(d->image->pixelWidth(), d->image->pixelHeight());
}
return QSize();
}
QString MetaEnginePreviews::originalMimeType() const
{
if (d->image.get())
{
return QString::fromStdString(d->image->mimeType());
}
return QString();
}
int MetaEnginePreviews::count() const
{
return d->properties.size();
}
int MetaEnginePreviews::size() const
{
return count();
}
int MetaEnginePreviews::dataSize(int index)
{
if ((index < 0) || (index >= size()))
{
return 0;
}
return d->properties[index].size_;
}
int MetaEnginePreviews::width(int index)
{
if ((index < 0) || (index >= size()))
{
return 0;
}
return d->properties[index].width_;
}
int MetaEnginePreviews::height(int index)
{
if ((index < 0) || (index >= size()))
{
return 0;
}
return d->properties[index].height_;
}
QString MetaEnginePreviews::mimeType(int index)
{
if ((index < 0) || (index >= size()))
{
return QString();
}
return QString::fromStdString(d->properties[index].mimeType_);
}
QString MetaEnginePreviews::fileExtension(int index)
{
if ((index < 0) || (index >= size()))
{
return QString();
}
return QString::fromStdString(d->properties[index].extension_);
}
QByteArray MetaEnginePreviews::data(int index)
{
if ((index < 0) || (index >= size()))
{
return QByteArray();
}
qCDebug(DIGIKAM_METAENGINE_LOG) << "index : " << index;
qCDebug(DIGIKAM_METAENGINE_LOG) << "properties: " << count();
QMutexLocker lock(&s_metaEngineMutex);
try
{
Exiv2::PreviewImage image = d->manager->getPreviewImage(d->properties[index]);<--- Shadow variable
return QByteArray(reinterpret_cast<const char*>(image.pData()), image.size());
}
catch (Exiv2::AnyError& e)
{
MetaEngine::Private::printExiv2ExceptionError(QLatin1String("Cannot load metadata with Exiv2:"), e);
return QByteArray();
}
catch (...)
{
qCCritical(DIGIKAM_METAENGINE_LOG) << "Default exception from Exiv2";
return QByteArray();
}
}
QImage MetaEnginePreviews::image(int index)
{
QByteArray previewData = data(index);
QImage image;
if (previewData.isEmpty() || !image.loadFromData(previewData))
{
return QImage();
}
return image;
}
} // namespace Digikam
#if defined(Q_CC_CLANG)
# pragma clang diagnostic pop
#endif
|