We do it differently from everybody else...
A traditional HiDPI implementation typically scales up
everything. I.e. if the user wants a 1px border, it's scaled up to
2px. The wayland server typically presents an output width/height that
has been scaled *down*.
This is all a bit backwards, but perhaps was the best choice to make
legacy applications at least work.
f00bar on the other hand, wants to give the user absolute
control. Thus, we don't scale up at all. If the user wants a 25px bar
height, that's what he gets.
This does mean however, that we need to scale *down* the surface size
since it's in logical pixels, not physical.
So we scale *down* the surface size (which then gets scaled back up by
the wayland server), and then render everything *on* that surface
without any scaling.
Bar is drawn, though only TOP is supported atm. No
screen/display/output selection is possible yet. Mouse *click* works,
but not setting the cursor.
Lots of debug output, crappy code yada yada.
