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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.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "pagerenderer.h"
+
+#include <QElapsedTimer>
+#include <QLoggingCategory>
+#include <QPainter>
+#include <QPdfDocument>
+#include <QUrl>
+
+Q_DECLARE_LOGGING_CATEGORY(lcExample)
+
+PageRenderer::PageRenderer(QObject *parent)
+ : QThread(parent)
+ , m_document(nullptr)
+ , m_page(0)
+ , m_zoom(1.)
+ , m_minRenderTime(1000000000.)
+ , m_maxRenderTime(0.)
+ , m_totalRenderTime(0.)
+ , m_totalPagesRendered(0)
+{
+}
+
+void PageRenderer::setDocument(QPdfDocument *document)
+{
+ m_document = document;
+}
+
+void PageRenderer::requestPage(int page, qreal zoom, Priority priority)
+{
+ // TODO maybe queue up the requests
+ m_page = page;
+ m_zoom = zoom;
+ start(priority);
+}
+
+void PageRenderer::run()
+{
+ renderPage(m_page, m_zoom);
+}
+
+void PageRenderer::renderPage(int page, qreal zoom)
+{
+ if (!m_document || m_document->status() != QPdfDocument::Ready)
+ return;
+
+ const QSizeF size = m_document->pageSize(page) * m_zoom;
+
+ QElapsedTimer timer;
+ timer.start();
+
+ const QImage &img = m_document->render(page, size);
+
+ const qreal secs = timer.nsecsElapsed() / 1000000000.0;
+ if (secs < m_minRenderTime)
+ m_minRenderTime = secs;
+
+ if (secs > m_maxRenderTime)
+ m_maxRenderTime = secs;
+
+ m_totalRenderTime += secs;
+ ++m_totalPagesRendered;
+
+ emit pageReady(page, zoom, img);
+
+ qCDebug(lcExample) << "page" << page << "zoom" << m_zoom << "size" << size << "in" << secs <<
+ "secs; min" << m_minRenderTime <<
+ "avg" << m_totalRenderTime / m_totalPagesRendered <<
+ "max" << m_maxRenderTime;
+}