Qt 5.9 | Qt Quick | Qt Quick Examples - Shader Effects | shadereffects.qml Example File

Qt 5.9.9 Reference Documentation

# shadereffects.qml Example File

shadereffects/shadereffects.qml

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      import QtQuick 2.0
      import QtQml.Models 2.1
      import "content"

      Rectangle {
          id: root
          width: 320
          height: 480
          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") }
          }

          ShaderEffectSource {
              id: theSource
              sourceItem: theItem
          }

          function saturate(x) {
              return Math.min(Math.max(x, 0), 1)
          }

          function sliderToColor(x) {
              return Qt.rgba(saturate(Math.max(2 - 6 * x, 6 * x - 4)),
                              saturate(Math.min(6 * x, 4 - 6 * x)),
                              saturate(Math.min(6 * x - 2, 6 - 6 * x)))
          }

          Grid {
              anchors.centerIn: parent
              columns: 2

              Item {
                  id: theItem
                  width: 160
                  height: 160
                  ListView {
                      anchors.centerIn: parent
                      width: 160
                      height: 140
                      clip: true
                      snapMode: ListView.SnapOneItem
                      model: ObjectModel {
                          Text {
                              width: 160
                              height: 140
                              horizontalAlignment: Text.AlignHCenter
                              verticalAlignment: Text.AlignVCenter
                              font.pixelSize: 118
                              font.family: "Times"
                              color: "blue"
                              text: "Qt"
                          }
                          Image {
                              width: 160
                              height: 140
                              source: "content/qt-logo.png"
                          }
                          Image {
                              width: 160
                              height: 140
                              source: "content/face-smile.png"
                          }
                      }
                  }
              }
              ShaderEffect {
                  width: 160
                  height: 160
                  property variant source: theSource
                  property real amplitude: 0.04 * wobbleSlider.value
                  property real frequency: 20
                  property real time: 0
                  NumberAnimation on time { loops: Animation.Infinite; from: 0; to: Math.PI * 2; duration: 600 }
                  fragmentShader: "qrc:shadereffects/content/shaders/wobble.frag"
                  Slider {
                      id: wobbleSlider
                      anchors.left: parent.left
                      anchors.right: parent.right
                      anchors.bottom: parent.bottom
                      height: 40
                  }
              }
              ShaderEffect {
                  width: 160
                  height: 160
                  property variant source: theSource
                  property variant shadow: ShaderEffectSource {
                      sourceItem: ShaderEffect {
                          width: theItem.width
                          height: theItem.height
                          property variant delta: Qt.size(0.0, 1.0 / height)
                          property variant source: ShaderEffectSource {
                              sourceItem: ShaderEffect {
                                  width: theItem.width
                                  height: theItem.height
                                  property variant delta: Qt.size(1.0 / width, 0.0)
                                  property variant source: theSource
                                  fragmentShader: "qrc:shadereffects/content/shaders/blur.frag"
                              }
                          }
                          fragmentShader: "qrc:shadereffects/content/shaders/blur.frag"
                      }
                  }
                  property real angle: 0
                  property variant offset: Qt.point(15.0 * Math.cos(angle), 15.0 * Math.sin(angle))
                  NumberAnimation on angle { loops: Animation.Infinite; from: 0; to: Math.PI * 2; duration: 6000 }
                  property variant delta: Qt.size(offset.x / width, offset.y / height)
                  property real darkness: shadowSlider.value
                  fragmentShader: "qrc:shadereffects/content/shaders/shadow.frag"
                  Slider {
                      id: shadowSlider
                      anchors.left: parent.left
                      anchors.right: parent.right
                      anchors.bottom: parent.bottom
                      height: 40
                  }
              }
              ShaderEffect {
                  width: 160
                  height: 160
                  property variant source: theSource
                  property variant delta: Qt.size(0.5 / width, 0.5 / height)
                  fragmentShader: "qrc:shadereffects/content/shaders/outline.frag"
              }
              ShaderEffect {
                  width: 160
                  height: 160
                  property variant source: theSource
                  property color tint: root.sliderToColor(colorizeSlider.value)
                  fragmentShader: "qrc:shadereffects/content/shaders/colorize.frag"
                  Slider {
                      id: colorizeSlider
                      anchors.left: parent.left
                      anchors.right: parent.right
                      anchors.bottom: parent.bottom
                      height: 40
                  }
              }
              ShaderEffect {
                  width: 160
                  height: 160
                  property variant source: theSource
                  property real bend: 0
                  property real minimize: 0
                  property real side: genieSlider.value
                  SequentialAnimation on bend {
                      loops: Animation.Infinite
                      NumberAnimation { to: 1; duration: 700; easing.type: Easing.InOutSine }
                      PauseAnimation { duration: 1600 }
                      NumberAnimation { to: 0; duration: 700; easing.type: Easing.InOutSine }
                      PauseAnimation { duration: 1000 }
                  }
                  SequentialAnimation on minimize {
                      loops: Animation.Infinite
                      PauseAnimation { duration: 300 }
                      NumberAnimation { to: 1; duration: 700; easing.type: Easing.InOutSine }
                      PauseAnimation { duration: 1000 }
                      NumberAnimation { to: 0; duration: 700; easing.type: Easing.InOutSine }
                      PauseAnimation { duration: 1300 }
                  }
                  mesh: Qt.size(10, 10)
                  vertexShader: "qrc:shadereffects/content/shaders/genie.vert"
                  Slider {
                      id: genieSlider
                      anchors.left: parent.left
                      anchors.right: parent.right
                      anchors.bottom: parent.bottom
                      height: 40
                  }
              }
          }
      }