Re: Redisplay issue

[Eli Zaretskii]

> Date: Mon, 07 Dec 2015 12:33:22 +0900
> From: YAMAMOTO Mitsuharu <address@hidden>
> Cc: Eli Zaretskii <address@hidden>,
>       martin rudalics <address@hidden>,
>       emacs-devel <address@hidden>
> 
> > I tried the patch.  However Cairo frame and non-Cairo frame still
> > differ by the same amount as reported before.
> 
> So, rounding has nothing to do with the difference you observe.
> 
> It seems that freetype has two types of structures containing metrics
> values (ascender, descender, height): FT_FaceRec and FT_Size_Metrics.
> ftfont.c uses the former for scalable fonts and the latter for the
> other cases.

Perhaps Yuan could look at the respective values in the debugger, and
see if they explain the 1-pixel difference.  Can you suggest to him
how to set up his debugging session so as to catch the values for the
default font?

Thanks.