[cairo] Cairo font size should be in units

[Carl Worth]

On Tue, 28 Sep 2004 11:11:30 -0700, Bill Spitzak wrote:
> Also it is important (and I think everybody agrees) that Cairo scales should 
> not cause the glyph metricies to change, although the glyphs themselves can 
> change shape a bit due to hinting. Otherwise it is impossible to reproduce a 
> graphic at different sizes, for instance a simple right-justify will no 
> longer produce a straight right edge.

Actually, Owen argues quite convincingly that the layout layer will need
two independent sets of metrics. So we may just need to provide both.

I'll comment more on that when I have the time to look over the pango
integration proposal.

-Carl