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  1. Qt
  2. QTBUG-94387

OpacityMask does not work with source item rotation animation

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Details

    • Bug
    • Status: Reported
    • P2: Important
    • Resolution: Unresolved
    • 5.15.1
    • None
    • None
    • Windows

    Description

      If take the OpacityMask example: https://doc.qt.io/qt-5/qml-qtgraphicaleffects-opacitymask.html :

       

      import QtQuick 2.12
      import QtGraphicalEffects 1.12
      
      Item {
          width: 300
          height: 300
      
          Image {
              id: bug
              source: "images/bug.jpg"
              sourceSize: Qt.size(parent.width, parent.height)
              smooth: true
              visible: false
          }
      
          Image {
              id: mask
              source: "images/butterfly.png"
              sourceSize: Qt.size(parent.width, parent.height)
              smooth: true
              visible: false
          }
      
          OpacityMask {
              anchors.fill: bug
              source: bug
              maskSource: mask
          }
      }
      

       

      And try to add the rotation animation on the bug item:

          Image {
              id: bug
              source: "images/bug.jpg"
              sourceSize: Qt.size(parent.width, parent.height)
              smooth: true
              visible: false
              RotationAnimator on rotation {
                  from: 0;
                  to: 360;
                  duration: 5000
              }
          }
      

      then nothing happens, the resulting image stays as static (as if the source is motionless).

       

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            qt.team.graphics.and.multimedia Qt Graphics Team
            kuzulis Denis Shienkov
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            Dates

              Created:
              Updated:

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