Re: [Freetype] Tahoma sub-pixel off in 2.1.4 and CVS?

[Werner LEMBERG]

> A comparison graphic is available here:
> 
> http://kayalabs.com/images/tahoma.png

Attached is a screenshot of

  ftview 11 tahoma.ttf

using horizontal LCD-optimized rendering (RGB) -- this is pressing key
`L' once.  There is no sub-pixel positioning; this is ftview from the
current CVS.  IMHO, this doesn't look bad.

> In general I prefer FreeType's version to ClearType; however, there
> are some problems.  My biggest issues are with 'A' and 'S'; 'A' is
> too bold and 'S' is horizontally splotchy in the center.  '2' and
> 'K' contain diagonals which are too thin, and 'a' and 'w' are
> particularly noisy as well.
> 
> I'd include a screenshot from CVS, but rendering there broken in
> other ways, and I fear it will confuse the issue.  Rest assured the
> flaws are still there.

I don't know how to tune the LCD appearance -- this is an xft issue I
believe, not related to FreeType.  A possible degradation of sub-pixel
rendering could appear due to a recent change in FreeType's CVS:

    - The linear advance width and height values were incorrectly
      rounded, making them virtually unusable if not loaded with
      FT_LOAD_LINEAR_DESIGN.

Maybe you can check the bug database or file a bug report to the
people who maintain the desktop you are using (gnome? kde?); this
would force those guys to actively look at the problems you
experience.  Maybe there is really a bug in FreeType lurking around,
who knows :-)


   Werner