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[Canvas] getContext error for canvas

  • Hi everyone, i'm developing an feature using canvas in QT 5.6. It's ok but when i downgrade to QT 5.3, it occurs error with method getContext for canvas.
    Here is the error message:

    Canvas {
       id: canvas
       onImageLoaded: {
          var ctx = canvas.getContext('2d');    ===> QML Canvas: Unable to use getContext() at this time, please wait for available: true