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/* This file is part of the KDE libraries
SPDX-FileCopyrightText: 2008 Andre Gemünd <scroogie@gmail.com>
SPDX-FileCopyrightText: 2016 Alexander Volkov <a.volkov@rusbitech.ru>
SPDX-FileCopyrightText: 2022 Kai Uwe Broulik <kde@broulik.de>
SPDX-License-Identifier: LGPL-2.0-or-later
*/
#include "config-thumbnail.h"
#include "jpegcreator.h"
#include "jpegcreatorsettings5.h"
#include <QImage>
#include <QImageReader>
#include <KLocalizedString>
#include <KPluginFactory>
#if HAVE_KEXIV2
#include <KExiv2/KExiv2>
#endif
K_PLUGIN_CLASS_WITH_JSON(JpegCreator, "jpegthumbnail.json")
JpegCreator::JpegCreator(QObject *parent, const QVariantList &args)
: KIO::ThumbnailCreator(parent, args)
{
}
KIO::ThumbnailResult JpegCreator::exifThumbnail(const KIO::ThumbnailRequest &request) const
{
#if HAVE_KEXIV2
KExiv2Iface::KExiv2 exiv2Image(request.url().toLocalFile());
QImage image = exiv2Image.getExifThumbnail(JpegCreatorSettings::self()->rotate());
if (image.isNull()) {
return KIO::ThumbnailResult::fail();
}
// skip embedded thumbnail if strictly smaller
if (image.size().width() < request.targetSize().width() && image.size().height() < request.targetSize().height()) {
return KIO::ThumbnailResult::fail();
}
return KIO::ThumbnailResult::pass(image);
#else
Q_UNUSED(request)
return KIO::ThumbnailResult::fail();
#endif // HAVE_KEXIV2
}
KIO::ThumbnailResult JpegCreator::imageReaderThumbnail(const KIO::ThumbnailRequest &request) const
{
QImageReader imageReader(request.url().toLocalFile(), "jpeg");
const QSize imageSize = imageReader.size();
if (imageSize.isValid() && (imageSize.width() > request.targetSize().width() || imageSize.height() > request.targetSize().height())) {
const QSize thumbnailSize = imageSize.scaled(request.targetSize(), Qt::KeepAspectRatio);
imageReader.setScaledSize(thumbnailSize); // fast downscaling
}
imageReader.setQuality(75); // set quality so that the jpeg handler will use a high quality downscaler
imageReader.setAutoTransform(JpegCreatorSettings::self()->rotate());
QImage image = imageReader.read();
if (image.isNull()) {
return KIO::ThumbnailResult::fail();
}
return KIO::ThumbnailResult::pass(image);
}
KIO::ThumbnailResult JpegCreator::create(const KIO::ThumbnailRequest &request)
{
JpegCreatorSettings::self()->load();
if (auto result = exifThumbnail(request); result.isValid()) {
return result;
}
if (auto result = imageReaderThumbnail(request); result.isValid()) {
return result;
}
return KIO::ThumbnailResult::fail();
}
#include "jpegcreator.moc"
#include "moc_jpegcreator.cpp"
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