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// Copyright (C) 2023 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include "qquick3drenderextensions.h"
#include <QtQuick3D/private/qquick3dobject_p.h>
QT_BEGIN_NAMESPACE
/*!
\class QQuick3DRenderExtension
\inmodule QtQuick3D
\since 6.7
\brief Abstract class for implementing user side render extensions.
This is the front-end side of a render extension. The back-end side is implemented
in \l QSSGRenderExtension. The QQuick3DRenderExtension class is used to create a custom
render extension that can be used in the QtQuick3D scene graph by adding it to the list of
extensions to be used with a \l View3D. The extension code will then be run as part of
QtQuick3D's rendering pipeline execution.
The QQuick3DRenderExtension class is an abstract class that should be subclassed and
exposed to QML. The subclass should implement the \l QQuick3DRenderExtension::updateSpatialNode()
function and return a QSSGRenderExtension instance that contains the code that should be run.
\sa QSSGRenderExtension
*/
/*!
\qmltype RenderExtension
\nativetype QQuick3DRenderExtension
\inqmlmodule QtQuick3D
\inherits Object3D
\since 6.7
\brief An uncreatable abstract base type for render extensions.
\sa QQuick3DRenderExtension, QSSGRenderExtension, QQuick3DViewport::extensions()
*/
QQuick3DRenderExtension::QQuick3DRenderExtension(QQuick3DObject *parent)
: QQuick3DObject(*new QQuick3DObjectPrivate(QQuick3DObjectPrivate::Type::RenderExtension), parent)
{
}
QQuick3DRenderExtension::~QQuick3DRenderExtension()
{
}
/*!
\fn QSSGRenderGraphObject *QQuick3DRenderExtension::updateSpatialNode(QSSGRenderGraphObject *node)
This function is called during the synchronization of the QtQuick3D scene graph when an item is
created or when an update is requested, usually as a result of a change in the item's properties.
The function should return a QSSGRenderExtension instance that contains the code that should be
run during QtQuick3D's rendering pipeline execution.
\note The QSSGRenderExtension instance is a resource object and will be owned by the QtQuick3D
scene graph. If a different instance, or null, is returned, the previous instance will be
queued for deletion by the renderer.
\sa QSSGRenderExtension
*/
QSSGRenderGraphObject *QQuick3DRenderExtension::updateSpatialNode(QSSGRenderGraphObject *node)
{
return QQuick3DObject::updateSpatialNode(node);
}
QT_END_NAMESPACE
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