Fix content positioning relative to decoration on scaled outputs

Only the width and height were scaled previously, causing an incorrect
offset from the lower left corner, resulting in a small transparent gap
to form between the decoration and the content on the right and top.

Change-Id: I0b253c05c9b260d9ff3a6ab5f8aea42370561959
Reviewed-by: Pier Luigi Fiorini <pierluigi.fiorini@gmail.com>