Proper ligatures in Malayalam

Proper ligatures in Malayalam

[Ajith R]

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Hi,

I tried to make a document in Malayalam, an Indian language. However, 
the ligatures don't form as expected.

A minimal example is

\mainlanguage[ml]
\definefontfamily [malayalam] [ss] [Rachana] [features=malayalam-one]
\definefontfeature[default] [mode=node,kern=yes, liga=yes,tlig=yes, 
ccmp=yes,language=dflt, protrusion=quality, expansion=quality]
\setupbodyfont [malayalam]
\starttext
അദ്ധ്യായം
\stoptext

What setting am I missing?

The expected form is show in libre office with the same text and font, 
attached as an image


The sequence of Malayalam characters used is

U+0D05 U+0D26 U+0D4D U+0D27 U+0D4DU+0D2F U+0D3E U+0D2F U+0D02

Thanks,
ajith

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Proper ligatures in Malayalam

[Ajith R]

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Hi,

I tried to make a document in Malayalam, an Indian language. However, the ligatures don't form as expected. 

A minimal example is 

\mainlanguage[ml] 
\definefontfamily [malayalam] [ss] [Rachana] [features=malayalam-one]
\definefontfeature[default] [mode=node,kern=yes, liga=yes,tlig=yes, ccmp=yes,language=dflt, protrusion=quality, expansion=quality]
\setupbodyfont [malayalam]
\starttext
അദ്ധ്യായം
\stoptext

What setting am I missing?

The expected form is show in libre office with the same text and font, attached as an image


The sequence of Malayalam characters used is 

U+0D05 U+0D26 U+0D4D U+0D27 U+0D4DU+0D2F U+0D3E U+0D2F U+0D02

Thanks,
ajith

NB: This is my second attempt to send this email. Excuse me if this results in duplication.

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Re: Proper ligatures in Malayalam

[Hans Hagen]

On 6/24/2021 10:25 AM, Ajith R wrote:
> Hi,
> 
> I tried to make a document in Malayalam, an Indian language. However, the ligatures don't form as expected.
> 
> A minimal example is
> 
> \mainlanguage[ml]
> \definefontfamily [malayalam] [ss] [Rachana] [features=malayalam-one]
> \definefontfeature[default] [mode=node,kern=yes, liga=yes,tlig=yes, ccmp=yes,language=dflt, protrusion=quality, expansion=quality]
> \setupbodyfont [malayalam]
> \starttext
> അദ്ധ്യായം
> \stoptext
> 
> What setting am I missing?
> 
> The expected form is show in libre office with the same text and font, attached as an image
> 
> 
> The sequence of Malayalam characters used is
> 
> U+0D05 U+0D26 U+0D4D U+0D27 U+0D4DU+0D2F U+0D3E U+0D2F U+0D02
> 
> Thanks,
> ajith
> 
> NB: This is my second attempt to send this email. Excuse me if this results in duplication.
I'm consulting the indian script expert that parcipates in the code on 
this so ... patience is needed,

Hans


-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
        tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-----------------------------------------------------------------
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___________________________________________________________________________________

Re: Proper ligatures in Malayalam

[Ajith R]

On Thu, 24 Jun 2021 12:06:17 +0200
Hans Hagen <j.hagen@xs4all.nl> wrote:

Hi,
Thanks for looking into this. 
I can wait,
thanks,
ajith

> On 6/24/2021 10:25 AM, Ajith R wrote:
> > Hi,
> > 
> > I tried to make a document in Malayalam, an Indian language.
> > However, the ligatures don't form as expected.
> > 
> > A minimal example is
> > 
> > \mainlanguage[ml]
> > \definefontfamily [malayalam] [ss] [Rachana]
> > [features=malayalam-one] \definefontfeature[default]
> > [mode=node,kern=yes, liga=yes,tlig=yes, ccmp=yes,language=dflt,
> > protrusion=quality, expansion=quality] \setupbodyfont [malayalam]
> > \starttext അദ്ധ്യായം
> > \stoptext
> > 
> > What setting am I missing?
> > 
> > The expected form is show in libre office with the same text and
> > font, attached as an image
> > 
> > 
> > The sequence of Malayalam characters used is
> > 
> > U+0D05 U+0D26 U+0D4D U+0D27 U+0D4DU+0D2F U+0D3E U+0D2F U+0D02
> > 
> > Thanks,
> > ajith
> > 
> > NB: This is my second attempt to send this email. Excuse me if this
> > results in duplication.  
> I'm consulting the indian script expert that parcipates in the code
> on this so ... patience is needed,
> 
> Hans
> 
> 
> -----------------------------------------------------------------
>                                            Hans Hagen | PRAGMA ADE
>                Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
>         tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
> -----------------------------------------------------------------

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Re: Proper ligatures in Malayalam

[Ajith R]

Hi Hans,

I will wait for your response.

Thanks,
ajith

On Thu, 24 Jun 2021 12:06:17 +0200
Hans Hagen <j.hagen@xs4all.nl> wrote:

> On 6/24/2021 10:25 AM, Ajith R wrote:
> > Hi,
> > 
> > I tried to make a document in Malayalam, an Indian language.
> > However, the ligatures don't form as expected.
> > 
> > A minimal example is
> > 
> > \mainlanguage[ml]
> > \definefontfamily [malayalam] [ss] [Rachana]
> > [features=malayalam-one] \definefontfeature[default]
> > [mode=node,kern=yes, liga=yes,tlig=yes, ccmp=yes,language=dflt,
> > protrusion=quality, expansion=quality] \setupbodyfont [malayalam]
> > \starttext അദ്ധ്യായം
> > \stoptext
> > 
> > What setting am I missing?
> > 
> > The expected form is show in libre office with the same text and
> > font, attached as an image
> > 
> > 
> > The sequence of Malayalam characters used is
> > 
> > U+0D05 U+0D26 U+0D4D U+0D27 U+0D4DU+0D2F U+0D3E U+0D2F U+0D02
> > 
> > Thanks,
> > ajith
> > 
> > NB: This is my second attempt to send this email. Excuse me if this
> > results in duplication.  
> I'm consulting the indian script expert that parcipates in the code
> on this so ... patience is needed,
> 
> Hans
> 
> 
> -----------------------------------------------------------------
>                                            Hans Hagen | PRAGMA ADE
>                Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
>         tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
> -----------------------------------------------------------------

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___________________________________________________________________________________

Re: Proper ligatures in Malayalam

[Pablo Rodriguez]

On 6/24/21 10:25 AM, Ajith R wrote:
> Hi,
>
> I tried to make a document in Malayalam, an Indian language. However, the ligatures don't form as expected. 
> [..]
> What setting am I missing?

Hi Ajith,

I don’t have any idea about Malayalam (or any other Indic language [I
can deal with Latin and Greek scripts only, I’m afraid]), but this seems
to work fine.

    \mainlanguage[ml]
    \definefontfamily [malayalam] [rm] [RIT Rachana]
        [features=malayalam-two]
    \setupbodyfont [malayalam]
    \starttext
    \tf അദ്ധ്യായം\\
    \em അദ്ധ്യായം\\
    \bf അദ്ധ്യായം\\
    \em അദ്ധ്യായം
    \stoptext

Fonts are RIT Rachana from http://www.rachana.org.in/.

The relevant feature here malayalam-two. I used serif (or rm), since the
font looked to me more serif than sans-serif (Latin glyphs are clearly
from a serif font).

> The expected form is show in libre office with the same text and font, attached as an image

I would say that with malayalam-two ligatures are the same ones as in
LibreOffice.

Just in case it might help,

Pablo
--
http://www.ousia.tk
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Re: Proper ligatures in Malayalam

[ajithramayyan]

Hi Pablo

On Thu, 24 Jun 2021 16:17:53 +0200
Pablo Rodriguez <oinos@gmx.es> wrote:

> On 6/24/21 10:25 AM, Ajith R wrote:
> > Hi,
> >
> > I tried to make a document in Malayalam, an Indian language.
> > However, the ligatures don't form as expected. [..]
> > What setting am I missing?  
> 
> Hi Ajith,
> 
> I don’t have any idea about Malayalam (or any other Indic language [I
> can deal with Latin and Greek scripts only, I’m afraid]), but this
> seems to work fine.
> 
>     \mainlanguage[ml]
>     \definefontfamily [malayalam] [rm] [RIT Rachana]
>         [features=malayalam-two]
>     \setupbodyfont [malayalam]
>     \starttext
>     \tf അദ്ധ്യായം\\
>     \em അദ്ധ്യായം\\
>     \bf അദ്ധ്യായം\\
>     \em അദ്ധ്യായം
>     \stoptext
> 
> Fonts are RIT Rachana from http://www.rachana.org.in/.
> 
> The relevant feature here malayalam-two. I used serif (or rm), since
> the font looked to me more serif than sans-serif (Latin glyphs are
> clearly from a serif font).
> 
> > The expected form is show in libre office with the same text and
> > font, attached as an image  
> 
> I would say that with malayalam-two ligatures are the same ones as in
> LibreOffice.
> 
> Just in case it might help,
> 
> Pablo
> --
> http://www.ousia.tk
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an
> entry to the Wiki!
> 
> maillist : ntg-context@ntg.nl /
> http://www.ntg.nl/mailman/listinfo/ntg-context webpage  :
> http://www.pragma-ade.nl / http://context.aanhet.net archive  :
> https://bitbucket.org/phg/context-mirror/commits/ wiki     :
> http://contextgarden.net
> ___________________________________________________________________________________

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Re: Proper ligatures in Malayalam

[Pablo Rodriguez]

On 6/25/21 1:17 PM, ajithramayyan@yahoo.co.in wrote:
> Hi Pablo

Hi Ajith,

it isn’t clear to me whether you got the right ligatures with the sample
included in https://mailman.ntg.nl/pipermail/ntg-context/2021/102635.html.

I also wonder whether the feature "malayalam-two" got you the proper
ligatures for your original sample included in
https://mailman.ntg.nl/pipermail/ntg-context/2021/102631.html.

Just in case it might help,

Pablo
--
http://www.ousia.tk
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Re: Proper ligatures in Malayalam

[Ajith R]

Hi Pablo,

I am not sure if my previous mail was delivered or not.
I didn't get the correct ligatures even after copy pasting the code you
provided (incluing the feature "malayalam-two").

ajith

On Sat, 26 Jun 2021 11:04:44 +0200
Pablo Rodriguez <oinos@gmx.es> wrote:

> On 6/25/21 1:17 PM, ajithramayyan@yahoo.co.in wrote:
> > Hi Pablo  
> 
> Hi Ajith,
> 
> it isn’t clear to me whether you got the right ligatures with the
> sample included in
> https://mailman.ntg.nl/pipermail/ntg-context/2021/102635.html.
> 
> I also wonder whether the feature "malayalam-two" got you the proper
> ligatures for your original sample included in
> https://mailman.ntg.nl/pipermail/ntg-context/2021/102631.html.
> 
> Just in case it might help,
> 
> Pablo
> --
> http://www.ousia.tk
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an
> entry to the Wiki!
> 
> maillist : ntg-context@ntg.nl /
> http://www.ntg.nl/mailman/listinfo/ntg-context webpage  :
> http://www.pragma-ade.nl / http://context.aanhet.net archive  :
> https://bitbucket.org/phg/context-mirror/commits/ wiki     :
> http://contextgarden.net
> ___________________________________________________________________________________

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___________________________________________________________________________________

Re: Proper ligatures in Malayalam

[Aditya Mahajan]

On Thu, 1 Jul 2021, Ajith R wrote:

> Hi Pablo,
> 
> I am not sure if my previous mail was delivered or not.
> I didn't get the correct ligatures even after copy pasting the code you
> provided (incluing the feature "malayalam-two").

In such cases, it is always useful to include the output of `context --version` to help debug why the output is different.

Aditya
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Re: Proper ligatures in Malayalam

[Ajith R]

Hi,

I am running Debian 10 and context --version returns

mtx-context     | ConTeXt Process Management 1.02
mtx-context     |
mtx-context     | main context
file: /usr/share/texmf/tex/context/base/mkiv/context.mkiv
mtx-context     | current version: 2018.04.04 00:51



On Thu, 1 Jul 2021 21:03:54 -0400 (EDT)
Aditya Mahajan <adityam@umich.edu> wrote:

> On Thu, 1 Jul 2021, Ajith R wrote:
> 
> > Hi Pablo,
> > 
> > I am not sure if my previous mail was delivered or not.
> > I didn't get the correct ligatures even after copy pasting the code
> > you provided (incluing the feature "malayalam-two").
> 
> In such cases, it is always useful to include the output of `context
> --version` to help debug why the output is different.
> 
> Aditya
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an
> entry to the Wiki!
> 
> maillist : ntg-context@ntg.nl /
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> http://contextgarden.net
> ___________________________________________________________________________________

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Re: Proper ligatures in Malayalam

[Aditya Mahajan]

On Tue, 6 Jul 2021, Ajith R wrote:

> Hi,
> 
> I am running Debian 10 and context --version returns
> 
> mtx-context     | ConTeXt Process Management 1.02
> mtx-context     |
> mtx-context     | main context
> file: /usr/share/texmf/tex/context/base/mkiv/context.mkiv
> mtx-context     | current version: 2018.04.04 00:51

This is more than 3 years old! You will need to update. Not sure if there is a debian package for LMTX. You can always install it in parallel to the system installation by following the instructions on the wiki. 

Aditya
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Re: Proper ligatures in Malayalam

[Pablo Rodriguez]

On 7/7/21 8:57 AM, Aditya Mahajan wrote:
> On Tue, 6 Jul 2021, Ajith R wrote:
>> Hi,
>>
>> I am running Debian 10 and context --version returns
>> [...]
>> mtx-context     | current version: 2018.04.04 00:51
>
> This is more than 3 years old! You will need to update. Not sure if
> there is a debian package for LMTX. You can always install it in
> parallel to the system installation by following the instructions on the
> wiki.

Hi Ajith,

as Aditya mentioned, this version is too old (maybe it even lacks the
mlm2 script).

This old version won’t be fixed now (I’m afraid).

I hope it helps,

Pablo
--
http://www.ousia.tk
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Re: Proper ligatures in Malayalam

[Ajith R]

On Wed, 7 Jul 2021 18:20:45 +0200
Hi Pablo and Aditya,

Thanks to your help, I installed the latest version from context garden
and the ligatures are shown properly.
I was under the impression that updating through Debian was enough.

Thanks a lot,
ajith

Pablo Rodriguez <oinos@gmx.es> wrote:

> On 7/7/21 8:57 AM, Aditya Mahajan wrote:
> > On Tue, 6 Jul 2021, Ajith R wrote:  
> >> Hi,
> >>
> >> I am running Debian 10 and context --version returns
> >> [...]
> >> mtx-context     | current version: 2018.04.04 00:51  
> >
> > This is more than 3 years old! You will need to update. Not sure if
> > there is a debian package for LMTX. You can always install it in
> > parallel to the system installation by following the instructions
> > on the wiki.  
> 
> Hi Ajith,
> 
> as Aditya mentioned, this version is too old (maybe it even lacks the
> mlm2 script).
> 
> This old version won’t be fixed now (I’m afraid).
> 
> I hope it helps,
> 
> Pablo
> --
> http://www.ousia.tk
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an
> entry to the Wiki!
> 
> maillist : ntg-context@ntg.nl /
> http://www.ntg.nl/mailman/listinfo/ntg-context webpage  :
> http://www.pragma-ade.nl / http://context.aanhet.net archive  :
> https://bitbucket.org/phg/context-mirror/commits/ wiki     :
> http://contextgarden.net
> ___________________________________________________________________________________

___________________________________________________________________________________
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___________________________________________________________________________________

Re: Proper ligatures in Malayalam

[Ajith R]

Hi Pablo,

Just to be sure that you have the correct ligature, will you please
share a picture or pdf of the rendered text?

Thanks,
ajith

On Sat, 26 Jun 2021
11:04:44 +0200 Pablo Rodriguez <oinos@gmx.es> wrote:

> On 6/25/21 1:17 PM, ajithramayyan@yahoo.co.in wrote:
> > Hi Pablo
> 
> Hi Ajith,
> 
> it isn’t clear to me whether you got the right ligatures with the
> sample included in
> https://mailman.ntg.nl/pipermail/ntg-context/2021/102635.html.
> 
> I also wonder whether the feature "malayalam-two" got you the proper
> ligatures for your original sample included in
> https://mailman.ntg.nl/pipermail/ntg-context/2021/102631.html.
> 
> Just in case it might help,
> 
> Pablo
> --
> http://www.ousia.tk
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an
> entry to the Wiki!
> 
> maillist : ntg-context@ntg.nl /
> http://www.ntg.nl/mailman/listinfo/ntg-context webpage  :
> http://www.pragma-ade.nl / http://context.aanhet.net archive  :
> https://bitbucket.org/phg/context-mirror/commits/ wiki     :
> http://contextgarden.net
> ___________________________________________________________________________________

___________________________________________________________________________________
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Re: Proper ligatures in Malayalam

[Pablo Rodriguez]

On 7/6/21 7:44 PM, Ajith R wrote:
> Hi Pablo,
>
> Just to be sure that you have the correct ligature, will you please
> share a picture or pdf of the rendered text?

Hi Ajith,

sure, the output from the following source:

  \setupinteraction[state=start]
  \setupinteractionscreen[option=max]
  \definefontfamily [malayalam] [rm] [RIT Rachana]
      [features=malayalam-two]
  \setupbodyfont [malayalam]
  \setupattachments[method=hidden]
  \attachment[file=\jobname.tex]
  \attachment[file=http://rachana.org.in/downloads/RIT-Rachana-Regular.ttf]
  \attachment[file=http://rachana.org.in/downloads/RIT-Rachana-Italic.ttf]
  \attachment[file=http://rachana.org.in/downloads/RIT-Rachana-Bold.ttf]

\attachment[file=http://rachana.org.in/downloads/RIT-Rachana-BoldItalic.ttf]
  \starttext
  \startTEXpage[offset=1ex]
  \tf അദ്ധ്യായം\\
  \em അദ്ധ്യായം\\
  \em\bf അദ്ധ്യായം\\
  \em അദ്ധ്യായം
  \stopTEXpage
  \stoptext

is located at https://pdf.ousia.tk/ml.pdf.

I hope it helps,

Pablo
--
http://www.ousia.tk
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