[QML] Image SVG width: handling problems when binding

Whenever I use an SVG in an Image element there are problems with the binding.
A simple testcase:

    Rectangle
    {
        width: 1024
        height: 768
        Image { source: "images/Qt-logo.svg"; fillMode: Image.PreserveAspectFit; anchors.centerIn: parent; width: parent.width / 2}
    }

This testcase semi-works, in that the SVG is resized. It is however resized after converting the SVG to a pixmap. Is it not possible to have the SVG rendered-to-pixmap at a different size? SVG loading is currently completely useless because of this.

When the width of the parent is not explicitly set more problems occur (does not occur when the parent has an explicit width):

width: parent.width * 2 //Not resized, drawn at file's normal size
width: parent.width - 200 //Not resized, drawn at file's normal size
width: parent.width + 200 //Not resized, drawn at file's normal size

See also QT-3128