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Diffstat (limited to 'examples/pdf/pdfviewer/pagerenderer.h')
-rw-r--r-- | examples/pdf/pdfviewer/pagerenderer.h | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/examples/pdf/pdfviewer/pagerenderer.h b/examples/pdf/pdfviewer/pagerenderer.h new file mode 100644 index 0000000..5feccaa --- /dev/null +++ b/examples/pdf/pdfviewer/pagerenderer.h @@ -0,0 +1,80 @@ +/**************************************************************************** +** +** 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 |