Re: [ft] face->ascender always has the same height

[Olumide]

On 29/11/2016 12:31, Nikolay Sivov wrote:
> On 28.11.2016 16:09, Olumide wrote:
> > I've written a bit of code to rasterizing fonts at any arbitrary size as
> > follows:
> >  ...
> > Oddly, face->ascender always has the same height. Why is this the case?
>
> Because it's not scaled. It's a font global design metric that for SFNT
> fonts unfortunately exists in 3 different places: hhea table, and two
> times in OS/2 table of appropriate version. Freetype tries to return
> reasonable value from all three of those.
>
> > I need the ascender in order to locate my rasterized font in the
> > requested box (of max size FONT_HEIGHT).
>
> Note that rendered bitmap does not necessary fit into a box of
> FONT_HEIGHT height. Ascender/descender fields are used for layout
> estimation and scaling on Windows.

Thanks for chiming in.

All that said, is there some way to situate the 640 by 768 bitmap 
created by FreeType in the 1152 by 1152 'grid' that I requested?

- Olumide