QQuickPaintedItem renders text with low quality

QQuickPaintedItem uses Format_RGBA8888_Premultiplied rendering to render widgets in the QML Scenegraph as an image.

This is visibly lower quality than QML Text elements.

Testing QImages using Format_ARGB32_Premultiplied rendering shows identical quality to Text objects in QML.

Please either change the rendering formet used for QQuickPaintedItem, allow the user to change it via a property or rectify the difference in rendering quality between the two rendering styles.