[Fontconfig] fontconfig: Branch 'master'

[Raimund Steger]

pgajdos at suse.cz wrote:
> Hi,
>
> On Fri, Mar 01, 2013 at 01:32:23AM -0800, Akira TAGOH wrote:
>> +	  <family>Liberation Sans Narrow</family>
>> +	  <default>
>> +	    <family>Arial Narrow</family>
>> +	  </default>
>
>> [..]
>
>> +	  <family>Arial Narrow</family>
>> +	  <accept>
>> +	    <family>Liberation Sans Narrow</family>
>> +	  </accept>
>
> sorry for dumb question, I am just curious: where this
> asymetry helps? Little example would be pretty enough.

You mean why <default> is used in one direction and <accept> in the other?

I suppose it means that 'Arial Narrow' is considered a worse fit than 
anything else the user (or other config rules) might specify in the 
family property after 'Liberation Sans Narrow', while 'Liberation Sans 
Narrow' is considered a better fit than anything else the user might 
specify after 'Arial Narrow'. Meaning 'Arial Narrow' is treated a bit 
like a generic name here.

I. e.

   fc-match 'Liberation Sans Narrow,Sans'

would, if 'Liberation Sans Narrow' wasn't available, likely fall back to 
whatever 'Sans' expands to, even if 'Arial Narrow' was available.

   fc-match 'Arial Narrow,Sans'

however would fall back to 'Liberation Sans', if available.

I think the first example is highly unlikely to be encountered in 
practice, as Liberation is still somewhat of a platform-specific face 
and any CSS author etc. can be expected to use it only as explicit 
fallback, in which case it makes sense that fontconfig does little to 
make it particularly robust.

Raimund


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