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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtPDF module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL3$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPLv3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or later as published by the Free
** Software Foundation and appearing in the file LICENSE.GPL included in
** the packaging of this file. Please review the following information to
** ensure the GNU General Public License version 2.0 requirements will be
** met: http://www.gnu.org/licenses/gpl-2.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef PAGECACHE_H
#define PAGECACHE_H
#include <QImage>
#include <QThread>
class QPdfDocument;
class PageRenderer : public QThread
{
Q_OBJECT
public:
explicit PageRenderer(QObject *parent = nullptr);
public slots:
void setDocument(QPdfDocument *document);
void requestPage(int page, qreal zoom, Priority priority = QThread::NormalPriority);
signals:
void pageReady(int page, qreal zoom, QImage image);
protected:
void run() override;
private:
void renderPage(int page, qreal zoom);
private:
QPdfDocument *m_document;
// current request only
int m_page;
qreal m_zoom;
// performance statistics
qreal m_minRenderTime;
qreal m_maxRenderTime;
qreal m_totalRenderTime;
int m_totalPagesRendered;
};
#endif // PAGECACHE_H
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