sampling.qml Example File

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 import QtQuick 2.9
 import QtQuick.Shapes 1.0

 Rectangle {
     id: root
     width: 1024
     height: 768

     property color col: "lightsteelblue"
     gradient: Gradient {
         GradientStop { position: 0.0; color: Qt.tint(root.col, "#20FFFFFF") }
         GradientStop { position: 0.1; color: Qt.tint(root.col, "#20AAAAAA") }
         GradientStop { position: 0.9; color: Qt.tint(root.col, "#20666666") }
         GradientStop { position: 1.0; color: Qt.tint(root.col, "#20000000") }
     }

     Row {
         anchors.fill: parent
         anchors.margins: 20
         spacing: 40

         Column {
             spacing: 40

             Text {
                 text: "Original"
             }

             // A simple Shape without anything special.
             Rectangle {
                 color: "lightGray"
                 width: 400
                 height: 200

                 Shape {
                     x: 30
                     y: 20
                     width: 50
                     height: 50
                     scale: 2

                     ShapePath {
                         strokeColor: "green"
                         NumberAnimation on strokeWidth { from: 1; to: 20; duration: 5000 }
                         fillColor: "transparent"
                         capStyle: ShapePath.RoundCap

                         startX: 40; startY: 30
                         PathQuad { x: 50; y: 80; controlX: 0; controlY: 80 }
                         PathLine { x: 150; y: 80 }
                         PathQuad { x: 160; y: 30; controlX: 200; controlY: 80 }
                     }
                 }
             }

             Text {
                 text: "Supersampling (2x)"
             }

             // Now let's use 2x supersampling via layers. This way the entire subtree
             // is rendered into an FBO twice the size and then drawn with linear
             // filtering. This allows having some level of AA even when there is no
             // support for multisample framebuffers.
             Rectangle {
                 id: supersampledItem
                 color: "lightGray"
                 width: 400
                 height: 200

                 layer.enabled: true
                 layer.smooth: true
                 layer.textureSize: Qt.size(supersampledItem.width * 2, supersampledItem.height * 2)

                 Shape {
                     x: 30
                     y: 20
                     width: 50
                     height: 50
                     scale: 2

                     ShapePath {
                         strokeColor: "green"
                         NumberAnimation on strokeWidth { from: 1; to: 20; duration: 5000 }
                         fillColor: "transparent"
                         capStyle: ShapePath.RoundCap

                         startX: 40; startY: 30
                         PathQuad { x: 50; y: 80; controlX: 0; controlY: 80 }
                         PathLine { x: 150; y: 80 }
                         PathQuad { x: 160; y: 30; controlX: 200; controlY: 80 }
                     }
                 }
             }
         }

         Column {
             spacing: 40

             Text {
                 text: "Multisampling (4x)"
             }

             // Now let's use 4x MSAA, again via layers. This needs support for
             // multisample renderbuffers and framebuffer blits.
             Rectangle {
                 color: "lightGray"
                 width: 400
                 height: 200

                 layer.enabled: true
                 layer.smooth: true
                 layer.samples: 4

                 Shape {
                     x: 30
                     y: 20
                     width: 50
                     height: 50
                     scale: 2

                     ShapePath {
                         strokeColor: "green"
                         NumberAnimation on strokeWidth { from: 1; to: 20; duration: 5000 }
                         fillColor: "transparent"
                         capStyle: ShapePath.RoundCap

                         startX: 40; startY: 30
                         PathQuad { x: 50; y: 80; controlX: 0; controlY: 80 }
                         PathLine { x: 150; y: 80 }
                         PathQuad { x: 160; y: 30; controlX: 200; controlY: 80 }
                     }
                 }
             }
         }
     }
 }