Re: Redisplay issue

[Eli Zaretskii]

> Date: Sat, 05 Dec 2015 09:25:46 +0900
> From: YAMAMOTO Mitsuharu <address@hidden>
> Cc: martin rudalics <address@hidden>,
>       address@hidden,
>       address@hidden
> 
> >>>>> On Fri, 04 Dec 2015 11:47:23 +0200, Eli Zaretskii <address@hidden> said:
> 
> >> Date: Fri, 04 Dec 2015 10:05:14 +0100
> >> From: martin rudalics <address@hidden>
> >> CC: Eli Zaretskii <address@hidden>, emacs-devel <address@hidden>
> >> 
> >> > Without cairo:
> >> >
> >> > 17 (#o21, #x11, ?\C-q)
> >> >
> >> > With cairo:
> >> >
> >> > 16 (#o20, #x10, ?\C-p)
> >> 
> >> So it's the Cairo font backend.  59 text lines plus one menu bar line
> >> give the 60 pixels difference.
> 
> > I don't understand how can it do that with the same size of the same
> > font.  Some bug in ftcrfont.c, perhaps?
> 
> Maybe one font backend rounds the fractional metrics values but the
> other truncates them?

Could be.  Yuan, could you try these changes, and see if the
dimensions of the Cairo frame become identical to that of the
non-Cairo build?

Thanks.