Using FastBlur component causes "Qt Quick Emulation Layer" to crash in Qt Design Studio 1.5?

Shiny

I'm trying to create a component item using the QtGraphicalEffects.FastBlur, but I'm unable to edit it in the form editor in Qt Design Studio 1.5.0.

Here's an extremely simplified version of my qml which will give the message "Qt Quick emulation layer crashed (Line 1)" when you attempt to view it in the form editor. No errors in the text editor. The strange thing is that this same qml worked ok in Qt Design Studio 1.4, and if you "play" the qml to preview it, it runs fine as well.

If you comment out the FastBlur{} section of the code, it will not give an error, and will show up fine in the form editor.

import QtQuick 2.12
import QtQuick.Studio.Components 1.0
import QtQuick.Controls 2.3
import QtGraphicalEffects 1.0

Item {
    id: _root
    width: 200
    height: 500

    Pane {
        id: _blurred
        anchors.fill: parent
        padding: 0

        ShaderEffectSource {
            id: _effectsource
            anchors.fill: parent
            sourceRect: Qt.rect(_root.x, _root.y, _root.width, _root.height)
        }

        FastBlur {
            id: _blur
            anchors.fill: parent
            source: _effectsource
            radius: 100
        }
    }
}

Anyone know what is causing the "emulation layer" crash? Any way around it?

marco_piccolino

I've encountered the same issue.
I guess a workaround would be to use the component wrappers in
https://doc.qt.io/qtdesignstudio/qtquickdesigner-components-overview.html#applying-visual-effects
instead. If you create a brand new QDS project, you'll find these components under the imports folder,
you could package the ones that you need with your app.

marco_piccolino

I've opened an issue: https://bugreports.qt.io/browse/QDS-2514

marco_piccolino

Ah, I see a related issue here:
https://forum.qt.io/topic/114284/qtgraphicaleffects-components-cannot-be-created-in-qt-design-studio-qt-creator-community-version/4