QML.jl fails to display vector images unlike qml-qt6

[HVinther]

I have a folder structure like this:

├── test.jl
├── vectorimagetest.qml
└── assets
    └── image.svg

//vectorimagetest.qml
import QtQuick
import QtQuick.Controls

ApplicationWindow {
    id: mainWindow
    title: "dotcyz viewer"
    visible: true
    width: 640
    height: 488

    Image {
        source: "assets/image.svg"
    }
}

#test.jl
using QML

loadqml("vectorimagetest.qml")

exec()

If I run julia --project test.jl I get the following warning

Qt Warning: file:///home/hans/Projekter/cyz_viewer/vectorimagetest.qml:11:5: QML Image: Error decoding: file:///home/hans/Projekter/cyz_viewer/assets/add_region_button.svg: Unsupported image format (file:///home/hans/Projekter/cyz_viewer/vectorimagetest.qml:11, (null))

and a blank window.

Though if I run qml-qt6 vectorimagetest.qml the vector image is rendered without issue, and no warning is displayed.

The attached screen capture shows the two discrepancy:

Skaermoptagelse.fra.2026-02-11.13-14-25.mp4

[HVinther]

I don't no if this is related, but if I change the qml file to use VectorImage instead, as

//vectorimagetest.qml
import QtQuick
import QtQuick.Controls
import QtQuick.VectorImage

ApplicationWindow {
    id: mainWindow
    title: "dotcyz viewer"
    visible: true
    width: 640
    height: 488

    VectorImage {
        source: "assets/add_region_button.svg"
    }
}

Then qml-qt6 still has no problem, while julia --project test.jl returns the following warnings and errors:

Qt Warning: QQmlApplicationEngine failed to load component ((null):0, (null))
Qt Warning: file:///home/hans/Projekter/cyz_viewer/vectorimagetest.qml:3:1: module "QtQuick.VectorImage" is not installed (file:///home/hans/Projekter/cyz_viewer/vectorimagetest.qml:3, (null))
ERROR: LoadError: Failed to load QML file vectorimagetest.qml
Stacktrace:
[1] error(::String, ::String)
@ Base ./error.jl:54
[2] load_qml(qmlfilename::String, engine::CxxWrap.CxxWrapCore.CxxPtr{QML.QQmlApplicationEngine})
@ QML ~/.julia/packages/QML/WTNub/src/QML.jl:76
[3] loadqml(qmlfilename::String; kwargs::@kwargs{})
@ QML ~/.julia/packages/QML/WTNub/src/QML.jl:95
[4] loadqml(qmlfilename::String)
@ QML ~/.julia/packages/QML/WTNub/src/QML.jl:88
[5] top-level scope
@ ~/Projekter/cyz_viewer/test.jl:3
[6] include(mod::Module, _path::String)
@ Base ./Base.jl:306
[7] exec_options(opts::Base.JLOptions)
@ Base ./client.jl:317
[8] _start()
@ Base ./client.jl:550
in expression starting at /home/hans/Projekter/cyz_viewer/test.jl:3

I might note, that QtQuick.VectorImage is installed on my system as it is provide by the qt6-qtdeclarative package (and also qml-qt6 would be able to use it otherwise)

[barche]

Thanks for reporting this, PR #231 should solve the first issue, but for VectorImage I need to rebuild Qt6Declarative_jll with a currently missing dependency (Qt6QmlTools) so that will take a little longer.

[rakeshksr]

Same here. +1 for svg suuport—waiting for the next release.