/****************************************************************************
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** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
** Contact: https://www.qt.io/licensing/
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** This file is part of the Qt3D module of the Qt Toolkit.
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****************************************************************************/

#include "qlayer.h"
#include "qlayer_p.h"

QT_BEGIN_NAMESPACE

namespace Qt3DRender {

QLayerPrivate::QLayerPrivate()
    : QComponentPrivate()
{
}

/*!
    \class Qt3DRender::QLayer
    \inmodule Qt3DRender
    \since 5.5
    \brief The QLayer class provides a way of filtering which entities will be rendered.

    Qt3DRender::QLayer works in conjunction with the Qt3DRender::QLayerFilter in the FrameGraph.
    \sa Qt3DRender::QLayerFilter

    Qt3DRender::QLayer doesn't define any new properties but is supposed to only be referenced.

    \code
     #include <Qt3DCore/QEntity>
     #include <Qt3DRender/QGeometryRenderer>
     #include <Qt3DRender/QLayer>
     #include <Qt3DRender/QLayerFilter>
     #include <Qt3DRender/QViewport>

    // Scene
    Qt3DCore::QEntity *rootEntity = new Qt3DCore::Qt3DCore::QEntity;

    Qt3DCore::QEntity *renderableEntity = new Qt3DCore::Qt3DCore::QEntity(rootEntity);
    Qt3DRender::QGeometryRenderer *geometryRenderer = new Qt3DCore::QGeometryRenderer(renderableEntity);
    Qt3DRender::QLayer *layer1 = new Qt3DCore::QLayer(renderableEntity);
    renderableEntity->addComponent(geometryRenderer);
    renderableEntity->addComponent(layer1);

    ...

    // FrameGraph
    Qt3DRender::QViewport *viewport = new Qt3DRender::QViewport;
    Qt3DRender::QLayerFilter *layerFilter = new Qt3DRender::QLayerFilter(viewport);
    layerFilter->addLayer(layer1);

    ...
    \endcode
*/

/*!
    \qmltype Layer
    \instantiates Qt3DRender::QLayer
    \inherits Component3D
    \inqmlmodule Qt3D.Render
    \since 5.5
    \sa LayerFilter
    \brief Layer provides a way of filtering which entities will be rendered.

    Layer works in conjunction with the LayerFilter in the FrameGraph.

    Layer doesn't define any new properties but is supposed to only be referenced.

    \code
    import Qt3D.Core 2.0
    import Qt3D.Render 2.0

    Entity {
        id: root

        components: RenderSettings {
            // FrameGraph
            Viewport {
                ClearBuffers {
                    buffers: ClearBuffers.ColorDepthBuffer
                    CameraSelector {
                        camera: mainCamera
                        LayerFilter {
                            layers: [layer1]
                        }
                    }
                }
            }
        }

        // Scene
        Camera { id: mainCamera }

        Layer { id: layer1 }

        GeometryRenderer { id: mesh }

        Entity {
            id: renderableEntity
            components: [ mesh, layer1 ]
        }
    }
    \endcode
*/

/*! \fn Qt3DRender::QLayer::QLayer(Qt3DCore::QNode *parent)
  Constructs a new QLayer with the specified \a parent.
 */

QLayer::QLayer(QNode *parent)
    : QComponent(*new QLayerPrivate, parent)
{
}

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

/*! \internal */
QLayer::QLayer(QLayerPrivate &dd, QNode *parent)
    : QComponent(dd, parent)
{
}

} // namespace Qt3DRender

QT_END_NAMESPACE