Warning, file /office/calligra/gemini/ThumbnailHelperImpl.cpp was not indexed or was modified since last indexation (in which case cross-reference links may be missing, inaccurate or erroneous).

 /*
  * Assists in creating thumbnails for Gemini's file views
  * SPDX-FileCopyrightText: 2014 Dan Leinir Turthra Jensen <admin@leinir.dk>
  *
  * SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted-GPL
  *
  */
 
 #include "ThumbnailHelperImpl.h"
 #include <QMimeDatabase>
 
 #include <KoDocument.h>
 #include <KoDocumentEntry.h>
 #include <KoPart.h>
 #include <KoStore.h>
 
 #include <QTimer>
 #include <QImage>
 #include <QApplication>
 #include <QPainter>
 #include <QMimeType>
 
 // static const int minThumbnailSize = 400;
 
 ThumbnailHelperImpl::ThumbnailHelperImpl(QObject* parent)
     : QObject(parent)
     , m_part(0)
     , m_doc(0)
 {
 }
 
 ThumbnailHelperImpl::~ThumbnailHelperImpl()
 {
     if(m_doc)
         m_doc->deleteLater();
 }
 
 bool ThumbnailHelperImpl::convert(const QString& in, const QString& out, int width, int height)
 {
     // Other locations for thumbnails use the embedded thumbnails. This
     // application specifically exists to ensure less crashes in situations
     // where that embedded image doesn't exist or is invalid for whatever
     // reason. As a direct consequence, we do not attempt to load that image.
     QImage image(width, height, QImage::Format_ARGB32_Premultiplied);
 
     QMimeDatabase db;
     const QString mimetype = db.mimeTypeForFile(in).name();
     QString error;
     KoDocumentEntry documentEntry = KoDocumentEntry::queryByMimeType(mimetype);
     m_part = documentEntry.createKoPart(&error);
 
     if (!m_part)
         return false;
 
     m_doc = m_part->document();
 
     // prepare the document object
     m_doc->setCheckAutoSaveFile(false);
     m_doc->setAutoErrorHandlingEnabled(false); // don't show message boxes
 
     // load the document content
     QUrl url = QUrl::fromLocalFile(in);
     if (!m_doc->openUrl(url)) {
         delete m_doc;
         qDebug() << "Load failure! Document did not open" << url;
         return false;
     }
 
     while(m_doc->isLoading()) {
         qApp->processEvents();
     }
 
     // render the page on a bigger pixmap and use smoothScale,
     // looks better than directly scaling with the QPainter (malte)
     //const bool usePassedSize = (width > minThumbnailSize && height > minThumbnailSize);
     //const QSize size = usePassedSize ? QSize(width, height) : QSize(minThumbnailSize, minThumbnailSize);
     const QSize size = QSize(width, height);
     image = m_doc->generatePreview(size * 2).toImage().scaled(size, Qt::KeepAspectRatio, Qt::SmoothTransformation);
 
     m_doc->closeUrl();
 
     image.save(out);
 
     return m_loadingCompleted;
 }