bug#29078: 25.2; font issue with FreeType 2.8; should not use the rounded ascender and descender

[Lars Ingebrigtsen]

Vincent Lefevre <vincent@vinc17.net> writes:

> For TrueType fonts, FreeType 2.8 uses different rounding rules for
> values in the FT_Size_Metrics structure, which is apparently used
> by Emacs (since there are visible changes). In particular, one can
> now have ascender + descender > height. The consequences are:
>
> 1. Tables look a bit ugly.
>
> 2. Windows (with the same number of text lines) are unnecessarily
>    higher than before.
>
> 3. This can break existing configurations, where Emacs would be
>    opened at start up, with an expected window size.
>
> I could notice changes at least with the default Mono font, which
> appears to be DejaVu Sans Mono.

The Emacs font rendering has changed some in Emacs 27 -- are you still
seeing these problems there?

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   bloggy blog: http://lars.ingebrigtsen.no