Re: [ft-devel] Rounding of ascent, descent, and line height

[Alexei Podtelezhnikov]

On Thu, Jan 10, 2013 at 1:38 PM, Behdad Esfahbod <address@hidden> wrote:
> Hi,
>
> There's a bug against Webkit:
>
>   https://bugs.webkit.org/show_bug.cgi?id=102374
>
> that I think points to a problem in FreeType.  Simply put: for fonts that have
> ascent+descent=line-height, this property may not hold anymore after hinting.
>  ascent+descent may be off by one pixel compared to line-height, which is not
> quite desirable.

If I understand correctly that equality is broken only in the broken
fonts. So have you tried just forcing it?

metrics->height      = metrics->ascender + metrics->descender;

If the height is more trustworthy, force the ascender:

metrics->ascender  = metrics->height + metrics->descender;