[cairo] Font rendering options

[Bill Spitzak]

Owen Taylor wrote:

> While I'm a believer in *usually* working with an identity CTM, I really
> don't think calling cairo_scale (cr, 1.5) should make all text look
> incredibly ugly. 

Never mind, I'm not sure why I thought this would work. It does appear 
that the only useful settings are "the correct for current raster" and 
"turn off all hinting" (which in my scheme is done by making the font 
very large). You can also get "funky" appearance by making the font tiny 
and scaling it up. Attached is a test image showing what you get when 
you set the scale different than the hinting:
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