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/***************************************************************************
* Copyright (C) 2007, 2008, 2009 by Glad Deschrijver *
* <glad.deschrijver@gmail.com> *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, see <http://www.gnu.org/licenses/>. *
***************************************************************************/
#include "tikzpreviewthread.h"
#include <QImage>
#include <poppler-qt4.h>
TikzPreviewThread::TikzPreviewThread(QObject *parent)
: QThread(parent)
{
m_restart = false;
m_abort = false;
setTerminationEnabled(true);
}
TikzPreviewThread::~TikzPreviewThread()
{
m_mutex.lock();
m_abort = true;
m_condition.wakeOne();
m_mutex.unlock();
wait();
}
void TikzPreviewThread::generatePreview(Poppler::Document *tikzPdfDoc, qreal zoomFactor, int currentPage)
{
QMutexLocker locker(&m_mutex);
m_tikzPdfDoc = tikzPdfDoc;
m_zoomFactor = zoomFactor;
m_currentPage = currentPage;
if (!isRunning())
{
start(LowPriority);
}
else
{
// m_restart = true;
// m_condition.wakeOne();
m_abort = true;
m_condition.wakeAll();
m_abort = false;
m_restart = true;
// start(LowPriority);
}
}
void TikzPreviewThread::run()
{
while (true)
{
if (m_abort)
return;
m_mutex.lock();
Poppler::Page *pdfPage = m_tikzPdfDoc->page(m_currentPage);
const qreal zoomFactor = m_zoomFactor;
m_mutex.unlock();
const QImage tikzImage = pdfPage->renderToImage(zoomFactor * 72, zoomFactor * 72);
delete pdfPage;
emit showPreview(tikzImage);
// sleep
m_mutex.lock();
if (!m_restart)
m_condition.wait(&m_mutex);
m_restart = false;
m_mutex.unlock();
}
}
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