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import Qt3D.Core 2.0
import Qt3D.Render 2.0

TechniqueFilter {
    id: root

    objectName : "techniqueFilter"

    // Expose the viewport rect and camera. This allows users of this
    // forward rendering framegraph to decide which camera in the
    // scene renders to a given viewport region.
    //
    // Using this as a building block for a larger framegraph would
    // allow a scene to be rendered multiple times to different
    // viewports using different cameras for e.g.
    property alias mainCamera: mainCameraSelector.camera
    property alias detailCamera: detailCameraSelector.camera
    property alias layerFilters: layerFilter.layers
    property alias clearColor: viewport.clearColor

    requires : [
        Annotation { name: "RenderingStyle"; value: "forward";},
        Annotation { name: "Enabled"; value: true;}
    ]

    ClearBuffer {
        buffers: ClearBuffer.ColorDepthBuffer

        // Main Viewport
        Viewport {
            id: viewport
            rect: Qt.rect(0.0, 0, 1.0, 1.0)

            CameraSelector {
                id: mainCameraSelector

                LayerFilter {
                    id: layerFilter
                    RenderPassFilter { includes: [
                            Annotation {name : "Name"; value : "Texture"}
                        ] }
                }
            }
        }
    }

    Viewport {
        id: detailViewport
        rect: Qt.rect(0.75, 0.0, 0.25, 0.25)

        CameraSelector {
            id: detailCameraSelector
            RenderPassFilter {
                includes: [ Annotation { name: "Name"; value: "ColorMaterial"; } ]
            }
        }
    }
}