Alessandro Bonazzi
8c43d5cf2f
Files correlati : cg0.exe cg0700a.msk cg0700b.msk cg3.exe cg4.exe Bug : Commento: Merge 1.0 libraries
102 lines
3.6 KiB
C++
102 lines
3.6 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the plugins of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see http://www.qt.io/terms-conditions. For further
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** information use the contact form at http://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 or version 3 as published by the Free
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** Software Foundation and appearing in the file LICENSE.LGPLv21 and
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** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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** following information to ensure the GNU Lesser General Public License
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** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** As a special exception, The Qt Company gives you certain additional
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** rights. These rights are described in The Qt Company LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QMEEGOFENCESYNC_H
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#define QMEEGOFENCESYNC_H
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#include <QtGui/QWidget>
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class QMeeGoFenceSyncPrivate;
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//! A synchronization helper for GL pipeline.
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/*!
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Fence syncs provide a mechanism for synchronizing access to certain GL primitives
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and make it possible for the application developer to be sure that a certain point
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in the GL processing pipeline has been already executed before continuing operation.
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Currently fence syncs are only useful in conjunction with QMeeGoLivePixmaps.
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\code
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...
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// In your paint/expose event:
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QImage *image = livePixmap->lock(&someGlobalFenceSync);
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// Modify the image...
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livePixmap->release(image);
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painter->drawPixmap(0, 0, *livePixmap);
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someGlobalFenceSync.setSyncPoint();
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...
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\endcode
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Assuming the paint/expose events come repeatedly, the lock operation
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will block till the previous event completed painting the livePixmap.
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*/
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class Q_DECL_EXPORT QMeeGoFenceSync : public QObject
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{
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public:
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//! Constructs a new fence sync.
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/*!
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The fence sync is created without a sync point. You need to set the sync point manually.
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*/
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QMeeGoFenceSync(QWidget *parent = 0);
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//! Destructor for the fence sync.
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virtual ~QMeeGoFenceSync();
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//! Sets the fence sync.
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/*!
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The fence sync synchronization point should be set after all drawing has been scheduled.
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Setting a synchronization point always overrides the previous point -- whetver is was
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used (waited upon) or not.
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*/
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void setSyncPoint();
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private:
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Q_DISABLE_COPY(QMeeGoFenceSync)
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Q_DECLARE_PRIVATE(QMeeGoFenceSync)
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protected:
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QScopedPointer<QMeeGoFenceSyncPrivate> d_ptr; //! Private bits.
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friend class QMeeGoLivePixmap;
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};
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#endif
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