activating font specific ligatures

activating font specific ligatures

[Peter Rolf]

Hi,

I'm currently adding some otf-fonts (MinionPro,MyriadPro from 
Designer8.2) to ConTeXt.
I use the following font feature for MinionPro:
\definefontfeature[minion][script=latn,liga=yes,kern=yes,tlig=yes,trep=yes,onum=yes]

Most ligature work with this setting, but
 
ch ck ct ij IJ sp ss st

do not. Also the ligatures for small caps (some are defined) do not work 
at all.

Is there a way to manually select the ligatures of a font? I like to 
activate the ch-,ch-ligatures (c_h E085, c_k  E086), but not the too 
playful ct-,sp-,st-ligatures. I can live without all this, but it would 
be nice to use the possibilities of the font. Any hint is welcome.


Greetings, Peter


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Re: activating font specific ligatures

[Thomas A. Schmitz]

On Oct 1, 2009, at 1:17 PM, Peter Rolf wrote:

> Hi,
>
> I'm currently adding some otf-fonts (MinionPro,MyriadPro from  
> Designer8.2) to ConTeXt.
> I use the following font feature for MinionPro:
> \definefontfeature[minion] 
> [script=latn,liga=yes,kern=yes,tlig=yes,trep=yes,onum=yes]
>
> Most ligature work with this setting, but
> ch ck ct ij IJ sp ss st
>
> do not. Also the ligatures for small caps (some are defined) do not  
> work at all.
>
> Is there a way to manually select the ligatures of a font? I like to  
> activate the ch-,ch-ligatures (c_h E085, c_k  E086), but not the too  
> playful ct-,sp-,st-ligatures. I can live without all this, but it  
> would be nice to use the possibilities of the font. Any hint is  
> welcome.
>
>
> Greetings, Peter
>

 From my understanding (which may or may not be right): Minion has the  
dlig feature which you can turn on with dlig=yes, but that would  
enable the st and ct-ligs as well, and a quick test seems to show that  
there are no ch ck ij IJ or ss ligs. If you want to manually select, I  
think the only way would be to use the font in node mode and write  
lookup rules in a fea-file (yes, the one that Taco warned against on  
the list this very morning).

Best

Thomas


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Re: activating font specific ligatures

[Arthur Reutenauer]

> Most ligature work with this setting, but
>
> ch ck ct ij IJ sp ss st

  Those ligatures are usually not part of the liga feature that only activates
the most common f-ligatures; try dlig (discretionary ligatures), or maybe hlig
(historical ligatures), although it's more probably the former.

> Is there a way to manually select the ligatures of a font?

  You can use a feature file to define your own OpenType features that would
only activates the ligatures of your choice and associate it with a name, say
plig for "Peter's ligatures" (rlig is already used for "required ligatures" in
scripts like Arabic, better not to overwrite it).  See
fonts/fea/context/texhistoric.fea in the ConTeXt distribution for how it's done
for tlig (which is not a standard OpenType feature either).  Send it to Hans
when you're over, so that he can use it too because he's been traumatised by
the st and ct ligatures :-)

	Arthur
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Re: activating font specific ligatures

[Arthur Reutenauer]

On Thu, Oct 01, 2009 at 01:32:39PM +0200, Thomas A. Schmitz wrote:
>
> [etc.]

  Grrr, beaten by 5 seconds :-)

	Arthur
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Re: activating font specific ligatures

[Thomas A. Schmitz]

On Oct 1, 2009, at 1:34 PM, Arthur Reutenauer wrote:

> Grrr, beaten by 5 seconds :-)
>
> 	Arthur
> __________________________

Yes, academic procrastinators are the quickest replies on mailing  
lists :-)

Thomas
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Re: activating font specific ligatures

[Peter Rolf]

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Arthur Reutenauer schrieb:
>> Most ligature work with this setting, but
>>
>> ch ck ct ij IJ sp ss st
>>     
>
>   Those ligatures are usually not part of the liga feature that only activates
> the most common f-ligatures; try dlig (discretionary ligatures), or maybe hlig
> (historical ligatures), although it's more probably the former.
>
>   
>> Is there a way to manually select the ligatures of a font?
>>     
>
>   You can use a feature file to define your own OpenType features that would
> only activates the ligatures of your choice and associate it with a name, say
> plig for "Peter's ligatures" (rlig is already used for "required ligatures" in
> scripts like Arabic, better not to overwrite it).  See
> fonts/fea/context/texhistoric.fea in the ConTeXt distribution for how it's done
> for tlig (which is not a standard OpenType feature either).  Send it to Hans
> when you're over, so that he can use it too because he's been traumatised by
> the st and ct ligatures :-)
>
>   
:))

will do so

I have found the 'dlig'-feature in the font, but activating this feature 
doesn't work here.

Thanks Arthur and Thomas!

Best wishes,  Peter

> 	Arthur
> ___________________________________________________________________________________
> 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://tex.aanhet.net
> archive  : https://foundry.supelec.fr/projects/contextrev/
> wiki     : http://contextgarden.net
> ___________________________________________________________________________________
>
>   


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___________________________________________________________________________________

Re: activating font specific ligatures

[Thomas A. Schmitz]

On Oct 1, 2009, at 2:22 PM, Peter Rolf wrote:

> I have found the 'dlig'-feature in the font, but activating this  
> feature doesn't work here.

Hmm, it does work here:

\definefontfeature
   [pete]
    
[mode 
= 
node 
,script 
= 
latn 
,language 
=dflt,liga=yes,dlig=yes,onum=yes,pnum=yes,kern=yes,tlig=yes,trep=yes]

\starttypescript [serif] [minion]
   \definefontsynonym [Minion-Roman]          [name:MinionPro- 
Regular]  [features=pete]
   \definefontsynonym [Minion-Bold]           [name:MinionPro-Bold]   
[features=pete]
   \definefontsynonym [Minion-Italic]         [name:MinionPro-It]   
[features=pete]
   \definefontsynonym [Minion-Bold-Italic]    [name:MinionPro-BoldIt]  
[features=pete]
  \stoptypescript

\starttypescript [serif] [minion] [name]
   \usetypescript[serif][fallback]
   \definefontsynonym [Serif]           [Minion-Roman]  [features=pete]
   \definefontsynonym [SerifItalic]     [Minion-Italic]  [features=pete]
   \definefontsynonym [SerifBold]       [Minion-Bold]  [features=pete]
   \definefontsynonym [SerifBoldItalic] [Minion-Bold-Italic]   
[features=pete]
   \definefontsynonym [SerifCaps]       [Minion-Roman]   
[features=smallcaps]
\stoptypescript

\starttypescript [Minion]
   \definetypeface [MyMinion] [rm] [serif] [minion] [default]
\stoptypescript

\usetypescript[Minion]
\setupbodyfont[MyMinion,12pt]

\starttext

The official construction files flash and hiss IJ ij ack ock.

{\it The official construction files flash and hiss IJ ij ack ock.}

\stoptext

Thomas
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___________________________________________________________________________________

Re: activating font specific ligatures

[Peter Rolf]

Thomas A. Schmitz schrieb:
>
> On Oct 1, 2009, at 2:22 PM, Peter Rolf wrote:
>
>> I have found the 'dlig'-feature in the font, but activating this 
>> feature doesn't work here.
>
> Hmm, it does work here:
Yep, your example works here too... *but* now I'm also traumatized by 
the ugly ligatures. My lawyer will contact you ;)


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___________________________________________________________________________________

Re: activating font specific ligatures

[Thomas A. Schmitz]

On Oct 1, 2009, at 2:54 PM, Peter Rolf wrote:

> Yep, your example works here too... *but* now I'm also traumatized  
> by the ugly ligatures. My lawyer will contact you ;)
>
YOU made me look at those ligatures in the first place, so my lawyer  
will contact your lawyer :-) But seriously, it really depends: the  
French "Pléiade" editions have these st and ct ligatures, and for  
poetry, e.g., I don't find them ugly at all. But of course, you  
wouldn't want to use them for a technical manual.
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Re: activating font specific ligatures

[Hans Hagen]

Arthur Reutenauer wrote:

> for tlig (which is not a standard OpenType feature either).  Send it to Hans
> when you're over, so that he can use it too because he's been traumatised by
> the st and ct ligatures :-)

right now i'm traumatized by the fact that after our main communication 
server crashed (mail, ftp, svn, vpn) i had to spend this week figuring 
out a new setup

so, hence my lack of response this week

Hans

-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
      tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
-----------------------------------------------------------------
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___________________________________________________________________________________

Re: activating font specific ligatures

[Peter Rolf]

Hans Hagen schrieb:
> Arthur Reutenauer wrote:
>
>> for tlig (which is not a standard OpenType feature either).  Send it 
>> to Hans
>> when you're over, so that he can use it too because he's been 
>> traumatised by
>> the st and ct ligatures :-)
>
No easy way to do this anymore!?

\installfeature[otf][xlig]
\definefontfeature[minion][mode=node,script=latn,language=dflt,liga=yes,kern=yes,tlig=yes,trep=yes,onum=yes,
  xlig=yes,featurefile=minionpro.fea]

[font-ini.mkiv]
[..]
\def\doinstallfontfeature[#1][#2]%
  {\writestatus\m!fonts{installing font features was experimental}} % 
\ctxlua{fonts.install_feature("#1","#2")}}
-----

I can send you the *.fea file, but I doubt that the two ligatures 
(c_h,c_k) are worth all the trouble...

> right now i'm traumatized by the fact that after our main 
> communication server crashed (mail, ftp, svn, vpn) i had to spend this 
> week figuring out a new setup
>
> so, hence my lack of response this week
>
> Hans
>
> -----------------------------------------------------------------
>                                           Hans Hagen | PRAGMA ADE
>               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
>      tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
>                                              | www.pragma-pod.nl
> -----------------------------------------------------------------
> ___________________________________________________________________________________ 
>
> 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
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> archive  : https://foundry.supelec.fr/projects/contextrev/
> wiki     : http://contextgarden.net
> ___________________________________________________________________________________ 
>
>

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