Re: [ft] Suggestion to improve auto hinter

[JustFillBug]

On 2011-02-19, Werner LEMBERG <address@hidden> wrote:
>
>> So my suggestion is could FreeType's auto hinter do something like
>> this itself - e.g. if when working out all that clever latin blue
>> zone stuff, could it realise that actually it's making the font
>> smaller and a better result could be obtained by increasing the
>> requested pixel height and hinting at that height instead?  Or make
>> the hinter round up to the next line rather than round down, on the
>> basis that rounding up is likely to result in more readable text?
>
> This is probably dependent on the font.  For example, I've just run
> ftdiff on pala.ttf, and the autohint's vertical size of glyphs is
> basically always the same as with the unhinted glyphs.  Do you have
> this `problem' all the time, regardless of the selected font?
>

aflatin2.c take account the 'drift' accumulated over edge alignment.
I guess the bluezone scaling could use the 'drift' too in order to
minimize the problem, in af_latin2_metrics_scale_dim().