How to draw antialias MapPolyline lines?

[Alien]

Hello,

How to draw antialias MapPolyline lines? I try smooth : true but it doesn't make any differences!

Yours,

[ODБOï]

@Alien hi try antialiasing: true

[Alien]

Dear @LeLev ,
Unfortunately it doesn't work either

[ODБOï]

@Alien you can try enable multisampling on your QtQuick layer like discussed here
https://stackoverflow.com/questions/48895449/how-do-i-enable-antialiasing-on-qml-shapes

[Alien]

@LeLev Thanks for your advise. However ,when I set :

    QSurfaceFormat format;
    format.setSamples(8);
    QSurfaceFormat::setDefaultFormat(format);

in main.cpp on my system (Ubuntu 16.04 LTS QT 5.14.0) the application starts but it doesn't work just show me an still image.
and when I use :

        layer.enabled: true
        layer.samples: 4

on qml side it doesn't work and the shape doesn't appear anti-aliasing.
even I use 2,4,8 for sampling, still no effect!

[ODБOï]

@Alien
the last solution i have provided worked in my case.
but i'm on windows

#include <QGuiApplication>
#include <QQmlApplicationEngine>
#include <QSurfaceFormat>

int main(int argc, char *argv[])
{
    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);

    QGuiApplication app(argc, argv);

    QSurfaceFormat format;
       format.setSamples(8);
       QSurfaceFormat::setDefaultFormat(format);

    QQmlApplicationEngine engine;
    const QUrl url(QStringLiteral("qrc:/main.qml"));
    QObject::connect(&engine, &QQmlApplicationEngine::objectCreated,
                     &app, [url](QObject *obj, const QUrl &objUrl) {
        if (!obj && url == objUrl)
            QCoreApplication::exit(-1);
    }, Qt::QueuedConnection);
    engine.load(url);
    return app.exec();
}

import QtQuick 2.13
import QtQuick.Window 2.13
import QtQuick.Layouts 1.12
import QtLocation 5.6
import QtPositioning 5.6

Window {
    width: 512
    height: 512
    visible: true

    Plugin {
        id: mapPlugin
        name: "osm" 

    }


    Item {
        id: root
        anchors.fill: parent
        layer.enabled: true
        layer.samples: 4
      

        Map {
            anchors.fill: parent
            plugin: mapPlugin
            center: QtPositioning.coordinate(59.91, 10.75) // Oslo
            zoomLevel: 14
            MapPolyline {
                line.width: 8
                line.color: 'green'
                antialiasing: true
                smooth: true

                path: [
                    { latitude: 54.8, longitude: 10.33 },
                    { latitude: 54.8, longitude: 10.75 },
                    { latitude: 58.5, longitude: 11 },
                    { latitude: 59, longitude: 11 }
                ]
            }
        }
    }
}

[Alien]

@LeLev Thanks,

My OS(Ubuntu) might has some problems