[Lohit-devel-list] Fwd: [OpenType] Problems for Indian Typography discussion paper

[pravin.d.s at gmail.com]

On 24 January 2013 21:27, Dave Crossland <dave at lab6.com> wrote:

> FYI
>
> ---------- Forwarded message ----------
> From: John Hudson <john at tiro.ca>
> Date: 18 January 2013 16:42
> Subject: [OpenType] Problems for Indian Typography discussion paper
> To: "multiple recipients of OpenType"@mail.indx.co.uk
>
>
> Message from OpenType list:
>
>
> Back in August, there was a discussion on the OpenType developer list
> (subject: '<init> and <fina> in Indic scripts?') regarding Indic shaping
> engines limiting layout input and context to individual clusters,
> preventing contextual interaction across syllable boundaries. Although
> some concerns were raised about possible impact on existing fonts if
> this behaviour were to change, I believe this is a minor an unproven
> concern vs. the clear problems raised for Indic typography by this
> limitation.
>
> I have prepared a discussion paper -- i.e. a paper to prompt discussion
> -- illustrating some of the problems that occur in Indian typography
> that cannot be resolved without cross-cluster layout interaction. This
> paper is available here:
>
> http://www.tiro.com/John/Problems_for_Indic_Typography.pdf
>
>
Thanks Dave for forwarding this to Lohit List.

Some of the combination you have mentioned handled in better way with
existing features in Lohit and Sakal Bharati. I think font designer by
considering these issues before design can help in this.

http://pravins.fedorapeople.org/with-lohit.png
http://pravins.fedorapeople.org/with-sakalbharati.png

I am not sure for dotted circle part yet, dunno is it valid combination or
not. Need input from language person for same.

But i am definitely support request you have made to have consideration of
glyphs inbetween cluster/syllable. It will definitely give more flexibility
to font developers to develop high quality font with limited number of
glyphs. I have seen such issues in lohit telugu, for below base part will
provide some example.

I dont think it will affect any existing font, if implement in proper way
in OTLS, like enabling across cluster context only if font contain <fina>
feature. In this way it will not affect existing fonts anyway.

Best Regards,
Pravin Satpute
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