Re: Malayalam & SF_PROCESS_ZWJ

["Sayamindu Dasgupta" <sayamindu gmail com>]

On 6/17/07, Behdad Esfahbod <behdad behdad org> wrote:
> On Sun, 2007-06-17 at 02:22 +1000, Harshula wrote:
> > Hi,
> >
> > I noticed that the SF_PROCESS_ZWJ flag has been removed from the
> > Malayalam script flags in Pango as part of:
> > http://bugzilla.gnome.org/show_bug.cgi?id=357790
> >
> > My understanding from the indic unicode.org mailing list was that it was
> > now essential, for Malayalam (and of course Sinhala), for ZWJ to be
> > passed along to the GSUB stage of the font lookup.
> >
> > Have the rules changed? What was the justification for the removal of
> > the SF_PROCESS_ZWJ from Malayalam script flags?
>
> Hi,
>
> Unfortunately there's not been much justification I'm afraid :(.  The
> Indic shaper is by all means unmaintained.  So I just let all interested
> parties discuss and come up with patches and when they seem to agree,
> I'll commit.  I know that at some point we will need to revert much of
> those changes...
>
> Anyway, I'm probably going to stop doing that, it was wrong to start
> with.  We (Pango, Qt, ICU, HarfBuzz) need someone with enough time and
> knowledge to study the current Indic shaper AND follow MS and Unicode
> happenings and maintaining/fixing the shaper.  So far I've not seen
> anyone on the horizon.

I'm ready to help with any fix that might be needed. I have already
proposed a few fixes for the Bengali script (see bugs 427667, 427611,
427584). Of these 427667 is applicable to all Indic scripts, and I
would love to have some input on it from users of other Indic scripts.

Cheers,
Sayamindu


--
Sayamindu Dasgupta
[http://sayamindu.randomink.org/ramblings]