【QML】圆形头像

功能：将方形图片显示为圆形图片

import QtQuick 2.9
import QtQuick.Window 2.2
import QtGraphicalEffects 1.0

Window {
    visible: true
    width: 640
    height: 480
    title: qsTr("Hello World")
    color: "blue"
    Rectangle {
            id: img
            width: 57
            height: 57
            radius: width/2
            color: "black"

            ImageNormal {
                id: _image
                smooth: true
                visible: false
                anchors.fill: parent
                imageSource: "file:///tmp/2"
                //sourceSize: Qt.size(parent.size, parent.size)
                antialiasing: true
            }
            Rectangle {
                id: _mask
                anchors.fill: parent
                radius: width/2
                visible: false
                antialiasing: true
                smooth: true
            }
            OpacityMask {
                id:mask_image
                anchors.fill: _image
                source: _image
                maskSource: _mask
                visible: true
                antialiasing: true
            }
        }
}