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/******************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the Qt PDF Module.
**
** $QT_BEGIN_LICENSE:COMM$
**
** 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.
**
** $QT_END_LICENSE$
**
******************************************************************************/
#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;
}
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