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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtQuick3D module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "stereoinfo_sg.h"
#include <QtDeclarative/qsgcontext.h>
#include <QtCore/qvariant.h>
QT_BEGIN_NAMESPACE
QSGStereoInfo::QSGStereoInfo(QSGContext *context)
: m_context(context)
, m_hasStereo(false)
, m_hasPreTransform(false)
{
QVariant v = m_context->property("hasStereo");
if (!v.isNull())
m_hasStereo = v.toBool();
v = m_context->property("hasPreTransform");
if (!v.isNull())
m_hasPreTransform = v.toBool();
const QMetaObject *meta = m_context->metaObject();
m_eyeProperty = meta->property(meta->indexOfProperty("eye"));
}
QSGStereoInfo::~QSGStereoInfo()
{
}
/*!
\fn QSGContext *QSGStereoInfo::context() const
Returns the scene graph rendering context that is being tracked
by this information object.
\internal
*/
/*!
\fn bool QSGStereoInfo::hasStereo() const
Returns true if context() supports stereo rendering; false otherwise.
\sa eye()
\internal
*/
/*!
\fn bool QSGStereoInfo::hasPreTransform() const
Returns true if context() supports the pre-multiplied transformation
node type QSGPreTransformNode; false otherwise. Pre-multiplied
transformations are used to assist with implementing FloatingItem.
\internal
*/
/*!
Returns the current eye that is being rendered. If context() does
not support stereo, then QGL::NoEye is returned. Otherwise
QGL::LeftEye or QGL::RightEye is returned.
This function is normally called from a scene graph node's preprocess()
function to adjust the behavior of the node depending upon which
eye is currently being rendered.
\sa hasStereo()
\internal
*/
QGL::Eye QSGStereoInfo::eye() const
{
// The "eye" property is assumed to be of type "int" with values
// 0, 1, and 2, which we cast to NoEye, LeftEye, and RightEye.
QVariant v = m_eyeProperty.read(m_context);
if (v.isNull())
return QGL::NoEye;
else
return QGL::Eye(v.toInt());
}
QT_END_NAMESPACE
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