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 }
                      }
                  }
              }
          }
      }
  }