Re: pango opentype font issues

["Denis Jacquerye" <moyogo gmail com>]

On 20/02/2008, Behdad Esfahbod <behdad behdad org> wrote:
> On Tue, 2008-02-19 at 21:33 -0600, Joshua Facemyer wrote:
>
>  > Thanks!
>  >
>  > I'm having issues with an opentype font, specifically (1) dynamic
>  > vertical placement of glyphs which make use of "calt" and (2) kerning
>  > on
>  > some glyphs.  The font in question is a fairly complicated one for
>  > ancient music - it is mostly feature and glyph complete, and works
>  > correctly on accurate opentype font rendering implementations (per
>  > the
>  > creator).
>
>
> "on accurate opentype font rendering implementations" pretty much means
>  nothing.  None of the implementations are perfect.  And Pango's is one
>  of the better ones.  Really.
>
>  Bugs you report will only be helpful if you attach a screenshot of Pango
>  rendering plus a screenshot of the desired rendering.  Otherwise it's
>  good for nothing.
>
>
>
>  > Firstly, however, I was wondering what the best software (on linux)
>  > would be to test the current pango support of opentype (what software
>  > uses the pango rendering exclusively that would accurately show pango
>  > bugs)?  That way I could test it before I made a more complete (and
>  > possibly inaccurate) report.
>
>
> I personally use gedit.
>
>
>  > Again, thanks!  And thanks for your efforts in this important
>  > software!
>  >
>  > JF
>
> --
>  behdad
>  http://behdad.org/

'calt' not being applied is part of the bug
http://bugzilla.gnome.org/show_bug.cgi?id=343111
It's a quick fix. 'calt' wasn't or isn't applied by default on many
font shapers, so 'ccmp' is sometimes used in fonts instead. 'calt' is
the proper feature for contextual alternate so Pango should apply it
by default, for an even better implementation.

-- 
Denis Moyogo Jacquerye --- http://home.sus.mcgill.ca/~moyogo
Nkótá ya Kongó míbalé --- http://info-langues-congo.1sd.org/
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