ImageMask.qml Example File

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 import QtQuick 1.0
 import Qt.labs.shaders 1.0

 Item {
     anchors.fill: parent

     Image {
         id: bg
         anchors.fill: parent
         source: "images/image2.jpg"
     }

     Item {
         id: mask
         anchors.fill: parent

         Text {
             text: "Mask text"
             font.pixelSize: 50
             font.bold: true
             anchors.horizontalCenter: parent.horizontalCenter

             NumberAnimation on rotation {
                 running: true
                 loops: Animation.Infinite
                 from: 0
                 to: 360
                 duration: 3000
             }

             SequentialAnimation on y {
                 running: true
                 loops: Animation.Infinite
                 NumberAnimation {
                     to: main.height
                     duration: 3000
                 }
                 NumberAnimation {
                     to: 0
                     duration: 3000
                 }
             }
         }

         Rectangle {
             id: opaqueBox
             width: 60
             height: parent.height
             SequentialAnimation on x {
                 running: true
                 loops: Animation.Infinite
                 NumberAnimation {
                     to: main.width
                     duration: 2000
                     easing.type: Easing.InOutCubic
                 }
                 NumberAnimation {
                     to: 0
                     duration: 2000
                     easing.type: Easing.InOutCubic
                 }
             }
         }

         Rectangle {
             width: 100
             opacity: 0.5
             height: parent.height
             SequentialAnimation on x {
                 PauseAnimation { duration: 100 }

                 SequentialAnimation {
                     loops: Animation.Infinite
                     NumberAnimation {
                         to: main.width
                         duration: 2000
                         easing.type: Easing.InOutCubic
                     }
                     NumberAnimation {
                         to: 0
                         duration: 2000
                         easing.type: Easing.InOutCubic
                     }
                 }
             }
         }
     }

     ImageMaskEffect {
         anchors.fill: parent
         image: ShaderEffectSource {
             sourceItem: Image { source: "images/image1.jpg" }
             live: false
             hideSource: true
         }
         mask: ShaderEffectSource {
             sourceItem: mask
             live: true
             hideSource: true
         }
     }
 }