Re: [ft] [ft-devel] Latin, Cyrillic, and Greek fonts questions

[Eben Sorkin]

I have to keep rapidly designing this cyrillic but I will see if I can get all 
that running shortly. I am keen to help.

Cheers!

-e.

On Sep 24, 2013, at 1:07 AM, Werner LEMBERG wrote:

> 
>> The ideal thing would be for FreeType to suppress this difference in
>> the EF at small heights and let it register at larger ones.
> 
> This is the normal behaviour.  Here are the blue zone character
> strings, together with the stringset definition which uses them:
> 
>  AF_BLUE_STRING_CYRILLIC_CAPITAL_TOP
>    "БВЕПЗОСЭ"
>  AF_BLUE_STRING_CYRILLIC_CAPITAL_BOTTOM
>    "БВЕШЗОСЭ"
>  AF_BLUE_STRING_CYRILLIC_SMALL /* for both top and bottom */
>    "хпншезос"
>  AF_BLUE_STRING_CYRILLIC_SMALL_MINOR /* bottom only */
>    "руф"
> 
>  AF_BLUE_STRINGSET_CYRL
>    { AF_BLUE_STRING_CYRILLIC_CAPITAL_TOP,    AF_BLUE_PROPERTY_LATIN_TOP       
>   }
>    { AF_BLUE_STRING_CYRILLIC_CAPITAL_BOTTOM, 0                                
>   }
>    { AF_BLUE_STRING_CYRILLIC_SMALL,          AF_BLUE_PROPERTY_LATIN_TOP       
> |
>                                              AF_BLUE_PROPERTY_LATIN_SMALL_TOP 
>   }
>    { AF_BLUE_STRING_CYRILLIC_SMALL,          0                                
>   }
>    { AF_BLUE_STRING_CYRILLIC_SMALL_MINOR,    0                                
>   }
>    { AF_BLUE_STRING_MAX,                     0                                
>   }
> 
> Value `0' means that it is a bottom blue zone.  As you can see, there
> is no string for lowercase letters with ascenders, which is
> intentional.  In particular, there is no blue zone for the upper part
> of lowercase EF.  On the other hand, lowercase letters with descenders
> are aligned at the bottom.
> 
> Regarding the uppercase EF, it is intentionally not in any blue zone
> charset; as a consequence, any special height or depth value of this
> glyph doesn't influence the position of the blue zones (which is
> computed as the mean value, based on the glyphs in the corresponding
> string).  If the top or bottom position of a glyph is near the blue
> zone, it gets snapped, otherwise it stays as-is.
> 
>> What do you expect will happen? I am about to find out because i am
>> adding Cyrillic to Merriweather and will be hinting it with
>> TTFA. :-)
> 
> I will soon add the recent changes to the auto-hinter to ttfautohint
> also, so stay tuned :-) Meanwhile, if you have some time, I would be
> glad if you could test your collection of Cyrillic fonts with the git
> version of FreeType.  With the `ftgrid' demo program, for example, you
> can easily observe the outline distortions at any ppem value.
> 
> 
>    Werner