[Fontconfig] Webdings and other MS symbol fonts don't display

[Behdad Esfahbod]

Revised patch attached, to declare zero language coverage for symbol fonts.

On 15-05-18 12:29 AM, Behdad Esfahbod wrote:
> Patch attached.  Needs documentation and comments, but otherwise looks about
> right to me.  Please review.
> 
> b
> 
> On 15-05-17 05:09 AM, Raimund Steger wrote:
>> On 05/14/15 21:38, Behdad Esfahbod wrote:
>>> On 15-05-14 03:32 AM, Raimund Steger wrote:
>>>> On 05/13/15 03:45, Behdad Esfahbod wrote:
>>>>> On 15-05-12 04:45 PM, Raimund Steger wrote:
>>>>>> [...]
>>>>
>>>> Anyway when I try rendering some text in WPF using WingDings I see that the
>>>> glyphs are accessible in two ways:
>>>>
>>>> * old 8-bit codepoints (0x20..0xff)
>>>> * PUA codepoints (0xf020..0xf0ff)
>>>
>>> What happens if you remove the macroman subtable?  Does it still do the 8-bit
>>> mapping?
>>
>> Yes, same behavior. (To avoid confusion with the stock Wingdings I renamed the
>> stripped font and used the WPF FontFamily constructor with a distinct
>> directory location, so I'm quite sure.)
>>
>>> [...]
>>>
>>> Ok, so detecting such symbol fonts and treating them specially is certainly
>>> possible.  We just need to figure out what special treatment is suitable.  I
>>> think I'm fine with adding your hack, but also marking the font with a special
>>> marker, such that only if a binding=strong family match happens the font is
>>> picked up and never as a fallback.  That should address all problems we know
>>> of, right? ;)
>>
>> I think the binding=strong check may not even be necessary. Since Wingdings
>> etc. aren't in any alias rules, the only way they would be chosen as fallback
>> (even in the presence of strong 'lang' elements) is if there was none other
>> available. And that's highly unlikely due to 49-sansserif.conf.
>>
>> After all, I don't recall any such bugreports for 2.8.0...
>>
>> Raimund
>>
>>

-- 
behdad
http://behdad.org/
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