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#include "qframegraphnode.h"
#include "qframegraphnode_p.h"
#include <Qt3DRender/qframegraphnodecreatedchange.h>

QT_BEGIN_NAMESPACE

namespace Qt3DRender {

QFrameGraphNodePrivate::QFrameGraphNodePrivate()
    : QNodePrivate()
{
}

/*!
    \class Qt3DRender::QFrameGraphNode
    \inmodule Qt3DRender
    \since 5.5

    \brief Base class of all FrameGraph configuration nodes.

    This class is rarely instanced directly since it doesn't provide
    any frame graph specific behavior, although it can be convenient
    to use for grouping other nodes together in dynamic frame graphs.
    The actual behavior comes from the subclasses.

    The subclasses are:
    \table
    \header
        \li class
        \li description
    \row
        \li Qt3DRender::QCameraSelector
        \li Select camera from all available cameras in the scene
    \row
        \li Qt3DRender::QClearBuffers
        \li Specify which buffers to clear and to what values
    \row
        \li Qt3DRender::QDispatchCompute
        \li Specify Compute operation kernels
    \row
        \li Qt3DRender::QFrustumCulling
        \li Enable frustum culling
    \row
        \li Qt3DRender::QLayerFilter
        \li Select which layers to draw
    \row
        \li Qt3DRender::QNoDraw
        \li Disable drawing
    \row
        \li Qt3DRender::QRenderPassFilter
        \li Select which render passes to draw
    \row
        \li Qt3DRender::QRenderStateSet
        \li Set render states
    \row
        \li Qt3DRender::QRenderSurfaceSelector
        \li Select which surface to draw to
    \row
        \li Qt3DRender::QRenderTargetSelector
        \li Select which QRenderTarget to draw to
    \row
        \li Qt3DRender::QSortPolicy
        \li Specify how entities are sorted to determine draw order
    \row
        \li Qt3DRender::QTechniqueFilter
        \li Select which techniques to draw
    \row
        \li Qt3DRender::QViewport
        \li Specify viewport
    \row
        \li Qt3DRender::QMemoryBarrier
        \li Places a memory barrier
    \endtable

 */

/*!
    \qmltype FrameGraphNode
    \inqmlmodule Qt3D.Render
    \instantiates Qt3DRender::QFrameGraphNode
    \inherits Node
    \since 5.5
    \brief Base class of all FrameGraph configuration nodes.

    This class is rarely instanced directly since it doesn't provide
    any frame graph specific behavior, although it can be convenient
    to use for grouping other nodes together in dynamic frame graphs.
    The actual behavior comes from the subclasses.

    The subclasses are:
    \table
    \header
        \li class
        \li description
    \row
        \li CameraSelector
        \li Select camera from all available cameras in the scene
    \row
        \li ClearBuffers
        \li Specify which buffers to clear and to what values
    \row
        \li DispatchCompute
        \li Specify compute operation kernels
    \row
        \li FrustumCulling
        \li Enable frustum culling
    \row
        \li LayerFilter
        \li Select which layers to draw
    \row
        \li NoDraw
        \li Disable drawing
    \row
        \li RenderPassFilter
        \li Select which render passes to draw
    \row
        \li RenderStateSet
        \li Set render states
    \row
        \li RenderSurfaceSelector
        \li Select which surface to draw to
    \row
        \li RenderTargetSelector
        \li Select which RenderTarget to draw to
    \row
        \li SortPolicy
        \li Specify how entities are sorted to determine draw order
    \row
        \li TechniqueFilter
        \li Select which techniques to draw
    \row
        \li Viewport
        \li Specify viewport
    \row
        \li MemoryBarrier
        \li Places a memory barrier
    \endtable
*/

/*!
    The constructor creates an instance with the specified \a parent.
 */
QFrameGraphNode::QFrameGraphNode(QNode *parent)
    : QNode(*new QFrameGraphNodePrivate, parent)
{
}

/*! \internal */
QFrameGraphNode::~QFrameGraphNode()
{
}

/*!
    Returns a pointer to the parent.
 */
QFrameGraphNode *QFrameGraphNode::parentFrameGraphNode() const
{
    QFrameGraphNode *parentFGNode = nullptr;
    QNode *parentN = parentNode();

    while (parentN) {
        if ((parentFGNode = qobject_cast<QFrameGraphNode *>(parentN)) != nullptr)
            break;
        parentN = parentN->parentNode();
    }
    return parentFGNode;
}

/*! \internal */
QFrameGraphNode::QFrameGraphNode(QFrameGraphNodePrivate &dd, QNode *parent)
    : QNode(dd, parent)
{
}

Qt3DCore::QNodeCreatedChangeBasePtr QFrameGraphNode::createNodeCreationChange() const
{
    return QFrameGraphNodeCreatedChangeBasePtr::create(this);
}

} // namespace Qt3DRender

QT_END_NAMESPACE
