Uncentered and half-height characters in terminals

[Silejonu]

In version 1.4, characters are reduced in height and uncentered in terminal windows. This behaviour was not present in 1.3 and downwards.

I tested (and successfully reproduced) this issue in GNOME Terminal and GNOME Console, on Arch Linux and Fedora 36. Both the .ttf and .otf files are affected.

All the other applications I tested (gedit, Text Editor, LibreOffice Writer) seem unaffected.

mononoki 1.3 behaviour:

mononoki 1.4 behaviour:

[madmalik]

Thanks for creating the issue. Is this happening for the otf version or the ttf version?

[Silejonu]

Thanks for creating the issue. Is this happening for the otf version or the ttf version?

I realised I forgot to mention it immediately after submitting the issue and edited it, but you're too quick. ^^

It happens with both the otf and ttf versions.

[datMaffin]

Hmm. I did not yet try to reproduce this, or try to dig deeper into this issue, but just comparing the metrics, there seems to be a small change:
1.4 .ttf is on the left, the 1.3 ttf is on the right

The "Really use Typo metrics" checkbox seems to now be enabled.

FontForge describes the "Really use Typo metrics" field as:

The HHead Line Gap is also different, but according to FontForge this is only used on a mac.
However, I think that the old value of 0 makes more sense. Because the "ascent" and "decent" is already the big value of 900 and 250, adding even more spacing via the line gap seems redundant.
But I do not know how it renders on macOS, so maybe its fine.

Definitely looks weird...
It feels, though, as if with 1.4 the "Typo Ascent", "Typo Descent" and "Typo Line Gap" are now used. But it is weird that Gnome Terminal would include the "Typo Line Gap" to size its cursor.

[madmalik]

Hmm. I did not yet try to reproduce this, or try to dig deeper into this issue, but just comparing the metrics, there seems to be a small change: 1.4 .ttf is on the left, the 1.3 ttf is on the right The "Really use Typo metrics" checkbox seems to now be enabled.

I updated glyphs from version 2 to version 3, maybe that changed some defaults. I'm gonna dig into this

[datMaffin]

I gave the current mononoki ttf release (1.4) a try in GNOME Terminal 3.28.2 (Ubuntu 18.04), and I was not able to reproduce it:

[Silejonu]

I just tested on Ubuntu 22.04, and I have the same issue.

[madmalik]

I was able to reproduce the issue under Linux Mint in gnome terminal myself. I've installed FontForge and changed the "really use typo metrics" and it doesn't make a difference.

I'm gonna play around with the configuration and try if I can find out whats causing it.

Edit: It is the headline gap value that is causing the problem. Now I just have to find a way to set that in glyphs.

[madmalik]

I found the relevant settings in glyphs. It ended up being both settings, that needed to be changed for it to be displayed properly: The "Really use typo metric" checkbox and the "HHead Line Gap" setting. Please nobody ask me why, it's black magic to me 😬 but should be fixed in the upcoming version! Thank you @datMaffin for nudging me in the right direction!