Apply transforms to an element's coordinates

[fregante]

<svg xmlns:xlink="http://www.w3.org/1999/xlink">
  <image x="10" y="20" transform="translate(200 10)" width="1" height="1" xlink:href="a.png"/>
</svg>

In an SVG like this, the translate transform could be applied to the x and y coordinates, and output it as:

<svg xmlns:xlink="http://www.w3.org/1999/xlink">
  <image x="210" y="30" width="1" height="1" xlink:href="a.png"/>
</svg>

Edit: it was also suggested here: #419 (comment), so I'd add "it can be done where x and y are supported, like image tags."