sampling.qml Example File | Qt Quick 5.12.9

- Qt 5.12
- Qt Quick
- Qt Quick Examples - Shapes
- sampling.qml Example File
- Qt 5.12.9 Reference Documentation

# sampling.qml Example File

shapes/content/sampling.qml

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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 }
                         }
                     }
                 }
             }
         }
     }