My concern with subpixel rendering has always been that it's fine for 
interactive use, but for producing plots that may end up on someone 
else's screen or on a printer, it can actually make matters much worse.

Agg (well freetype really) could do subpixel font rendering as well, but 
I deliberately stayed away from it last time I looked at fonts.  We 
could have some mechanism to determine whether the render is intended 
for a GUI or a file, but that would have to be dealt with carefully so 
as not to introduce more backend selection and context related problems.

Cheers,
Mike

Darren Dale wrote:
> On Tuesday 22 April 2008 02:54:09 pm Eric Firing wrote:
>   
>> In case any devels are interested in making more backends work on the
>> trunk:
>>
>> Running examples/backend_driver.py yields quite a few svg plots that are
>> incorrect, with things like colorbars missing their colors.
>>
>> The cairo backend does better, but also needs a little work.  Cairo is
>> looking more interesting with the latest release; the notes say that eps
>> output is now supported.
>>     
>
> Also, sibpixel rendering of fonts is supported in the new Cairo. On an LCD 
> monitor, fonts look sharper with Cairo than they do with AGG.
>
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-- 
Michael Droettboom
Science Software Branch
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA


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