Overpass Mono capital S is 1 pixel taller than a capital P on some sizes

[ghost]

Hello,

While trying Overpass Mono regular in my terminal I noticed that a capital S is 1 pixel taller than a capital P on some sizes.

On size 13, everything looks fine. When switching it to size 11 though, it looks off. For the following examples I turned off AA in my Gnome Tweak Tool, took a screenshot, and zoomed in in GIMP (2300% zoom):

Size 11 Size 13

So I decided to open the font in FontForge and it seems the capital S is ~ 1/10th taller than the capital P:

If this could be fixed, that would be great! :)

[davelab6]

This probably won't be fixed because the round shapes being measurably taller than the flat shapes is intended, so that they are perceived as the same height in typical font rendering environments.

This fully aliased style of rendering was last typical about 20+ years ago, and the freetype library is capable to antialiased rendering. I suggest exploring the GIMP options and using an option that antialiases text.

(It's possible that this is also a hinting bug and if ttfautohint has been used a ttfautohint control file can be written to correct the error made by the autohinter.)

[ghost]

Hi Dave,

Thanks for your reply!

The reason I turned off anti aliasing was because I figured I'd see what the font looks like without any extra effects. The same does happen when anti aliasing is enabled though:

Size 11 AA enabled Size 13 AA enabled

After you mentioned that it may also be a hinting bug, I tried disabling it, and that did seem to do the trick! Right now it looks like this:

Size 11 AA enabled, hinting disabled Size 13 AA enabled, hinting disabled

So I guess I'll just disable hinting and see how that works out for me.

Thanks again!

[madig]

Autohint the OTFs with https://github.com/adobe-type-tools/psautohint/ and see if that fixes it.