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Diffstat (limited to 'src/imports/threed/stereoview.cpp')
| -rw-r--r-- | src/imports/threed/stereoview.cpp | 339 |
1 files changed, 0 insertions, 339 deletions
diff --git a/src/imports/threed/stereoview.cpp b/src/imports/threed/stereoview.cpp deleted file mode 100644 index fc208f435..000000000 --- a/src/imports/threed/stereoview.cpp +++ /dev/null @@ -1,339 +0,0 @@ -/**************************************************************************** -** -** 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 "stereoview.h" -#include "stereovieweffect.h" -#include <QtGui/qpainter.h> -#include <QtGui/qpaintengine.h> -#include <QtGui/qgraphicsview.h> -#include <QtCore/qtimer.h> -#include <QtOpenGL/qgl.h> - -QT_BEGIN_NAMESPACE - -/*! - \qmlclass StereoView StereoView - \brief The StereoView item defines the layout of a view with left and right stereo eye images. - \since 4.8 - \ingroup qt3d::qml3d - - StereoView provides the logic to double-render the entire - application, firstly from the perspective of the left eye, - and then secondly from the perspective of the right eye. - By default, if the hardware does not support stereo, the - view will be drawn using red/cyan anaglyph filters as - shown in the following example: - - \snippet declarative/stereo/stereo.qml 1 - \dots - \snippet declarative/stereo/stereo.qml 2 - - \image stereo-screenshot-qml.png - - We could change this to double-wide stereo with the - \l layout property: - - \snippet declarative/stereo/stereo.qml 3 - \snippet declarative/stereo/stereo.qml 4 - \dots - \snippet declarative/stereo/stereo.qml 2 - - \image stereo-screenshot-qml2.png - - 2D items are placed within the 3D visual field using the - FloatingItem element and the \l{FloatingItem::depth}{depth} - property: - - \snippet declarative/stereo/stereo.qml 5 - - Negative depth values define distances behind the - \i{center of focus} of our scene, and positive depth - values define distances in front of the center of focus. - The center of focus corresponds to where the left and right - eye images coincide at depth 0. Usually the most important - item on the screen is placed at depth 0 so that the user's - attention is immediately drawn to it. Other items then - \i{float above} (positive depth) or \i{appear behind} - (negative depth) the center of focus. - - As a general rule, children of the StereoView element - should appear in \i{bottom up order}, from the most negative - depth to the most positive. This will ensure that the children - are painted correctly at their respective depths. - - \bold{Note:} StereoView is not supported with Qt Quick 2.0 as the - standard view classes are already stereo-aware. - - \sa FloatingItem, Viewport, {QML Stereo Viewing Example} -*/ - -/*! - \internal -*/ -StereoView::StereoView(QDeclarativeItem *parent) - : QDeclarativeItem(parent) - , m_layout(StereoView::Default) - , m_eye(QGL::NoEye) -{ - // We need paint() to be called to switch to an OpenGL viewport. - setFlag(QGraphicsItem::ItemHasNoContents, false); - - // Create a viewport item that defines the width and height - // of a single eye image. Our item children are parented here. - m_viewport = new QDeclarativeItem(this); - - // Create a QGraphicsEffect for performing the double-render. - m_effect = new StereoViewEffect(this); - setGraphicsEffect(m_effect); -} - -/*! - \internal -*/ -StereoView::~StereoView() -{ -} - -/*! - \qmlproperty enumeration StereoView::layout - - This property defines the layout of the left and right eye - images within this stereo view, and the relative size of - the \l viewport. - - \list - \o \c Default - the stereo layout is determined by the hardware. - If the hardware is incapable of stereo, \c RedCyan will - be used instead. The viewport size is determined by the - hardware type. This is the default setting. - \o \c Hardware - the stereo layout is determined by the - hardware. If the hardware is incapable of stereo, then - stereo rendering will be disabled rather than use \c RedCyan. - The viewport size is determined by the hardware type. - \o \c RedCyan - render the left eye image with a red filter and the - right eye image with a cyan filter, which makes the result - suitable for viewing with red/cyan anaglyph glasses. - The viewport occupies the entire StereoView. - \o \c LeftRight - the left and right eye images are rendered into - the left and right halves of the StereoView, with the - viewport occupying half the width and the full height. - \o \c RightLeft - the left and right eye images are rendered into - the right and left halves of the StereoView, with the - viewport occupying half the width and the full height. - \o \c TopBottom - the left and right eye images are rendered into - the top and bottom halves of the StereoView, with the - viewport occupying the full width and half the height. - \o \c BottomTop - the left and right eye images are rendered into - the bottom and top halves of the StereoView, with the - viewport occupying the full width and half the height. - \o \c StretchedLeftRight - same as LeftRight, but the two eye - halves are stretched to twice their original width. - \o \c StretchedRightLeft - same as RightLeft, but the two eye - halves are stretched to twice their original width. - \o \c StretchedTopBottom - same as TopBottom, but the two eye - halves are stretched to twice their original height. - \o \c StretchedBottomTop - same as BottomTop, but the two eye - halves are stretched to twice their original height. - \o \c Disabled - stereo rendering is disabled, depth values on - FloatingItem elements will be ignored, and the viewport - occupies the entire StereoView. - \endlist -*/ - -void StereoView::setLayout(StereoView::Layout layout) -{ - if (m_layout != layout) { - m_layout = layout; - updateViewportSize(); - emit layoutChanged(); - update(); - } -} - -/*! - \internal -*/ -QDeclarativeListProperty<QObject> StereoView::stereoViewData() -{ - // Return the "data" property for the viewport, which is - // where we add all of the item children. - return m_viewport->property("data").value< QDeclarativeListProperty<QObject> >(); -} - -/*! - \qmlproperty Item StereoView::viewport - - This property defines the extent and position of the eye - image viewport. All child items are parented under the viewport, - and should be positioned within it. In the following example, - the viewport will be the left half of the extent of the StereoView; - i.e. (0, 0, 360, 640). - - \code - StereoView { - layout: StereoView.LeftRight - width: 720; height: 640 - Rectangle { - anchors.fill: viewport - ... - } - } - \endcode - - The viewport property also appears as the \c parent property - of the children, so the following is equivalent: - - \code - StereoView { - layout: StereoView.LeftRight - width: 720; height: 640 - Rectangle { - anchors.fill: parent - ... - } - } - \endcode -*/ - -/*! - \internal - Finds the StereoView surrounding a specific \a item, usually - an instance of FloatingItem. -*/ -StereoView *StereoView::findView(QDeclarativeItem *item) -{ - while (item != 0) { - StereoView *view = qobject_cast<StereoView *>(item); - if (view) - return view; - item = item->parentItem(); - } - return 0; -} - -/*! - \internal -*/ -void StereoView::paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *widget) -{ - if (m_layout != RedCyan && m_layout != Default) - return; - - // Using a red-cyan effect, for which we must have OpenGL rendering. - // Or using the default layout, which is either hardware stereo - // or red-cyan. We need an OpenGL viewport for both. - QPaintEngine *engine = painter->paintEngine(); - if (engine->type() != QPaintEngine::OpenGL && - engine->type() != QPaintEngine::OpenGL2) { - if (widget) { - // Switch the surrounding QGraphicsView to use a QGLWidget as its - // viewport. We cannot do it here during painting, so schedule a - // slot to switch it the next time we reach the event loop. - QGraphicsView *view = - qobject_cast<QGraphicsView *>(widget->parentWidget()); - if (view) { - QTimer::singleShot(0, this, SLOT(switchToOpenGL())); - return; - } - } - } -} - -/*! - \internal -*/ -void StereoView::switchToOpenGL() -{ - // If there are multiple StereoView's in the QML, then it is - // possible that another StereoView has already switched to QGLWidget. - QList<QGraphicsView *> views = scene()->views(); - if (!views.isEmpty()) { - QGLWidget *glw = qobject_cast<QGLWidget *>(views[0]->viewport()); - if (glw) - return; - bool focused = views[0]->viewport()->hasFocus(); - QGLFormat format = QGLFormat::defaultFormat(); - if (m_layout == Default) - format.setStereo(true); // Request hardware stereo if available. - views[0]->setViewport(new QGLWidget(format, views[0])); - if (focused) - views[0]->viewport()->setFocus(); - } -} - -/*! - \internal -*/ -qreal StereoView::aspectRatioAdjustment() const -{ - switch (m_layout) { - case StretchedLeftRight: case StretchedRightLeft: return 2.0f; - case StretchedTopBottom: case StretchedBottomTop: return 0.5f; - default: return 1.0f; - } -} - -/*! - \internal -*/ -void StereoView::geometryChanged(const QRectF &newGeometry, - const QRectF &oldGeometry) -{ - QDeclarativeItem::geometryChanged(newGeometry, oldGeometry); - updateViewportSize(); -} - -/*! - \internal -*/ -void StereoView::updateViewportSize() -{ - qreal w = width(); - qreal h = height(); - switch (m_layout) { - case LeftRight: case RightLeft: w /= 2.0f; break; - case TopBottom: case BottomTop: h /= 2.0f; break; - default: break; - } - m_viewport->setSize(QSizeF(w, h)); -} - -QT_END_NAMESPACE |