Re: [ft-devel] Rendering artifacts

[Werner LEMBERG]

> Not sure whether this is a bug, known limitation or something else
> entirely,

It's something completely different...

> but here goes:
> 
> ftview 14 LiberationSerif-Regular.ttf [1]
> 
> Toggling anti-aliasing ('a' key) makes it obvious that it
> significantly degrades the quality of some glyphs (the leg of 'k'
> the slashes in rationals become almost invisible)

Looking into the font's `gasp' table you can see that the font expects
anti-aliasing starting with a font size of 18ppem.  In the range
9-17ppem, you have to use B/W rendering.  ftview ignores the `gasp'
table completely – it's just a diagnosing tool, not a real user
application, thus it allows switching between AA and B/W rendering for
comparison purposes.  However, `fontconfig' or similar libraries
*must* respect this table, otherwise you get bad rendering results.

In other words: Your bug report is invalid :-)


    Werner