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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qquickimagepreviewprovider_p.h"
#include <QtCore/qmutex.h>
#include <QtCore/qdebug.h>
QT_BEGIN_NAMESPACE
struct QQuickImagePreviewProviderPrivate
{
QString id;
QImage image;
QMutex mutex;
};
Q_GLOBAL_STATIC(QQuickImagePreviewProviderPrivate, priv)
QQuickImagePreviewProvider::QQuickImagePreviewProvider()
: QQuickImageProvider(QQuickImageProvider::Image)
{
}
QQuickImagePreviewProvider::~QQuickImagePreviewProvider()
{
QQuickImagePreviewProviderPrivate *d = priv();
QMutexLocker lock(&d->mutex);
d->id.clear();
d->image = QImage();
}
QImage QQuickImagePreviewProvider::requestImage(const QString &id, QSize *size, const QSize& requestedSize)
{
QQuickImagePreviewProviderPrivate *d = priv();
QMutexLocker lock(&d->mutex);
if (d->id != id)
return QImage();
QImage res = d->image;
if (!requestedSize.isEmpty())
res = res.scaled(requestedSize, Qt::KeepAspectRatio, Qt::SmoothTransformation);
if (size)
*size = res.size();
return res;
}
void QQuickImagePreviewProvider::registerPreview(const QString &id, const QImage &preview)
{
//only the last preview is kept
QQuickImagePreviewProviderPrivate *d = priv();
QMutexLocker lock(&d->mutex);
d->id = id;
d->image = preview;
}
QT_END_NAMESPACE
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