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typiconman / fonts-cu

OpenType fonts for Church Slavic
https://sci.ponomar.net/fonts.html
SIL Open Font License 1.1
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Kerning issues with Ponomar Unicode #34

Closed Mwvceu closed 5 years ago

Mwvceu commented 6 years ago

5fonts3words screenshot from LibreOffice

KrasnayaPloshchad commented 6 years ago

SIL claimed they used “Graphite’s smart shape-based kerning mechanism” to avoid collisions in their Awami Nastaliq font. https://software.sil.org/awami/what-is-special/ It’s exciting to know how does it works, and since Ponomar used Graphite too, I think you can improve the kerning in this way.

typiconman commented 6 years ago

Graphite kerning is hard to do. But yes, it should be done. See also #1.

typiconman commented 5 years ago

I updated the kerning, but the glagol + titlo + uk case is very difficult. Adding more kerning makes it look too spaced. Perhaps a better solution is to contextually substitute to a left-truncated uk in this case (see the last example). @Mwvceu @starover77 please comment.

Screenshot from 2019-03-20 17-41-05

starover77 commented 5 years ago

The contextual substitution with left-truncated uk looks good to me, and I think it would be an improvement to add it to the lookups. In all of the other demonstrated fonts, only the Pochaevsk and Irmologion fonts look OK with this character combination, which demonstrates that not all fonts are equal.

typiconman commented 5 years ago

Take a look at this. Screenshot from 2019-03-20 21-38-36

typiconman commented 5 years ago

The reported by @Mwvceu have been fixed. @starover77 Please check the kerning with the latest version of the font and see if there are any other issues.

starover77 commented 5 years ago

Looks good to me.

typiconman commented 5 years ago

I think we rushed with closing this. Placing an accent above the Uk creates problems. @starover77 please comment, especially regarding number 2. Screenshot from 2019-04-08 19-13-03

starover77 commented 5 years ago

I am not seeing any problems. What should I be looking for?

typiconman commented 5 years ago

Is the position of the acute accent correct? It looks strange, it almost collides with the ascender on the Uk. Here are some more examples: Screenshot from 2019-04-08 20-30-45

starover77 commented 5 years ago

It does look a little bit close, but not so bad that I think it looks wrong. In my opinion, I don't think it's worth any further attention.

However, the fourth letter, with the kamora, looks wrong to me. (I suppose this is because I am used to seeing pre-Nikonian poluustav texts.) Contextually, I am used to seeing a kamora placed over a completely truncated Uk (both left and right ascenders shortened), but I suppose that Muscovite Synodal era typography doesn't typically use this contextual substitution.

typiconman commented 5 years ago

The Uk with the kamora is correct for Muscovite Synodal typography.

starover77 commented 5 years ago

Yeah, I figured that. Modern typeface matrices had a lot less diversity that earlier forms, where truncated letters were used more extensively.

typiconman commented 5 years ago

So, should I keep the acute accent where it is now? Or return it to the raised position, as with the non-truncated version?

starover77 commented 5 years ago

My vote: Leave it where it is now (lowered).

typiconman commented 5 years ago

Alright. Then we'll consider this closed.