* ConTeXt inserts additional dots for Iosevka font
@ 2021-09-11 20:36 Marcel Fabian Krüger via ntg-context
2021-09-11 22:01 ` Hans Hagen via ntg-context
0 siblings, 1 reply; 6+ messages in thread
From: Marcel Fabian Krüger via ntg-context @ 2021-09-11 20:36 UTC (permalink / raw)
To: ConTeXt users list; +Cc: Marcel Fabian Krüger
Hi,
ConTeXt has some issues with the character variant features of the
Iosevka font available at
https://github.com/be5invis/Iosevka/releases/download/v10.1.1/super-ttc-iosevka-10.1.1.zip
E.g. the following document
\definefontfeature
[default:test]
[default]
[cv36=2,cv26=6]
\definefont
[SomeFont]
[name:iosevka*default:test]
\starttext
\SomeFont
I live in a dot-heavy world.
\stoptext
has six dots instead of one dot over each "i". Tests with multiple other
font shapers and inspection of the font file confirmed that this is not
intentional behavior.
Could you take a look at that?
(Based on a luotfload bug report at
https://github.com/latex3/luaotfload/issues/202)
Best regards,
Marcel
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^ permalink raw reply [flat|nested] 6+ messages in thread* Re: ConTeXt inserts additional dots for Iosevka font
2021-09-11 20:36 ConTeXt inserts additional dots for Iosevka font Marcel Fabian Krüger via ntg-context
@ 2021-09-11 22:01 ` Hans Hagen via ntg-context
2021-09-11 23:12 ` Marcel Fabian Krüger via ntg-context
0 siblings, 1 reply; 6+ messages in thread
From: Hans Hagen via ntg-context @ 2021-09-11 22:01 UTC (permalink / raw)
To: mailing list for ConTeXt users; +Cc: Hans Hagen, Marcel Fabian Krüger
On 9/11/2021 10:36 PM, Marcel Fabian Krüger via ntg-context wrote:
> Hi,
>
> ConTeXt has some issues with the character variant features of the
> Iosevka font available at
> https://github.com/be5invis/Iosevka/releases/download/v10.1.1/super-ttc-iosevka-10.1.1.zip
>
> E.g. the following document
>
> \definefontfeature
> [default:test]
> [default]
> [cv36=2,cv26=6]
What is the number supposed to indicate ? It is not an alternate, right?
> \definefont
> [SomeFont]
> [name:iosevka*default:test]
> \starttext
> \SomeFont
> I live in a dot-heavy world.
> \stoptext
>
> has six dots instead of one dot over each "i". Tests with multiple other
> font shapers and inspection of the font file confirmed that this is not
> intentional behavior.
>
> Could you take a look at that?
> (Based on a luotfload bug report at
> https://github.com/latex3/luaotfload/issues/202)
when a number is specified for a multiple and the is > 1 we repeat the
last glyph ... this is a 'secret' feature that (already a while ago) we
added when discussing / testing a experimental arabic font in
combination with a paragraph optimizer ... normally users will say 'yes'
and not give a number
i can make that a 'context only' feature if needed
Hans
-----------------------------------------------------------------
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Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-----------------------------------------------------------------
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^ permalink raw reply [flat|nested] 6+ messages in thread* Re: ConTeXt inserts additional dots for Iosevka font
2021-09-11 22:01 ` Hans Hagen via ntg-context
@ 2021-09-11 23:12 ` Marcel Fabian Krüger via ntg-context
2021-09-12 7:45 ` Wolfgang Schuster via ntg-context
0 siblings, 1 reply; 6+ messages in thread
From: Marcel Fabian Krüger via ntg-context @ 2021-09-11 23:12 UTC (permalink / raw)
To: Hans Hagen; +Cc: Marcel Fabian Krüger, mailing list for ConTeXt users
Hi,
On Sun, Sep 12, 2021 at 12:01:08AM +0200, Hans Hagen wrote:
> > \definefontfeature
> > [default:test]
> > [default]
> > [cv36=2,cv26=6]
>
> What is the number supposed to indicate ? It is not an alternate, right?
Actually it is an alternate, but only partially.
>
> > \definefont
> > [SomeFont]
> > [name:iosevka*default:test]
> > \starttext
> > \SomeFont
> > I live in a dot-heavy world.
> > \stoptext
> >
> > has six dots instead of one dot over each "i". Tests with multiple other
> > font shapers and inspection of the font file confirmed that this is not
> > intentional behavior.
> >
> > Could you take a look at that?
> > (Based on a luotfload bug report at
> > https://github.com/latex3/luaotfload/issues/202)
> when a number is specified for a multiple and the is > 1 we repeat the last
> glyph ... this is a 'secret' feature that (already a while ago) we added
> when discussing / testing a experimental arabic font in combination with a
> paragraph optimizer ... normally users will say 'yes' and not give a number
Thanks, this explains a lot. In this font it's problematic though
because the cv.. features have multiple loopup tables, one of which is a
"multiple" lookup (used to decompose characters before applying the
replacements, especially decomposing i into the stem and the dot)
and another one is an "alternate" lookup providing multiple character
variants.
So selecting one of the other alternates requires that a number is
passed, but passing the number enables the repetition in the multiple
lookup...
>
> i can make that a 'context only' feature if needed
That would certainly solve the issue for me, but it might be nice to
provide a solution for context users too. Maybe the feature could be
adapted to only interpret the argument as a replication factor if the
"multiple" is the only lookup for the feature or if no other lookup
for the feature is an alternate lookup?
Best,
Marcel
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: ConTeXt inserts additional dots for Iosevka font
2021-09-11 23:12 ` Marcel Fabian Krüger via ntg-context
@ 2021-09-12 7:45 ` Wolfgang Schuster via ntg-context
2021-09-12 11:43 ` Hans Hagen via ntg-context
2021-09-12 12:21 ` Hans Hagen via ntg-context
0 siblings, 2 replies; 6+ messages in thread
From: Wolfgang Schuster via ntg-context @ 2021-09-12 7:45 UTC (permalink / raw)
To: mailing list for ConTeXt users; +Cc: Wolfgang Schuster
Marcel Fabian Krüger via ntg-context schrieb am 12.09.2021 um 01:12:
> Hi,
>
> On Sun, Sep 12, 2021 at 12:01:08AM +0200, Hans Hagen wrote:
>>> \definefontfeature
>>> [default:test]
>>> [default]
>>> [cv36=2,cv26=6]
>> What is the number supposed to indicate ? It is not an alternate, right?
> Actually it is an alternate, but only partially.
There is a table on the github page with the results from all alternatives.
Look at section "Character Variats" on https://github.com/be5invis/Iosevka
>>> \definefont
>>> [SomeFont]
>>> [name:iosevka*default:test]
@Marcel: I suggest to load ttc fonts with the file option.
\starttext
\definedfont[file:iosevka.ttc(Iosevka)*none]Iosevka
\stoptext
Wolfgang
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: ConTeXt inserts additional dots for Iosevka font
2021-09-12 7:45 ` Wolfgang Schuster via ntg-context
@ 2021-09-12 11:43 ` Hans Hagen via ntg-context
2021-09-12 12:21 ` Hans Hagen via ntg-context
1 sibling, 0 replies; 6+ messages in thread
From: Hans Hagen via ntg-context @ 2021-09-12 11:43 UTC (permalink / raw)
To: mailing list for ConTeXt users; +Cc: Hans Hagen
On 9/12/2021 9:45 AM, Wolfgang Schuster via ntg-context wrote:
> Marcel Fabian Krüger via ntg-context schrieb am 12.09.2021 um 01:12:
>> Hi,
>>
>> On Sun, Sep 12, 2021 at 12:01:08AM +0200, Hans Hagen wrote:
>>>> \definefontfeature
>>>> [default:test]
>>>> [default]
>>>> [cv36=2,cv26=6]
>>> What is the number supposed to indicate ? It is not an alternate, right?
>> Actually it is an alternate, but only partially.
>
> There is a table on the github page with the results from all alternatives.
>
> Look at section "Character Variats" on https://github.com/be5invis/Iosevka
>
>>>> \definefont
>>>> [SomeFont]
>>>> [name:iosevka*default:test]
>
> @Marcel: I suggest to load ttc fonts with the file option.
>
> \starttext
> \definedfont[file:iosevka.ttc(Iosevka)*none]Iosevka
> \stoptext
as it experimental anyway, i changed this trick to
\definefontfeature[default:test][default][cvxx={repeatlast:3}]
repeatmiddle and repeatfirst also supported (it also permits context
users to play with runtime feature definitions using multiples that act
as extensibles)
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
-----------------------------------------------------------------
___________________________________________________________________________________
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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___________________________________________________________________________________
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: ConTeXt inserts additional dots for Iosevka font
2021-09-12 7:45 ` Wolfgang Schuster via ntg-context
2021-09-12 11:43 ` Hans Hagen via ntg-context
@ 2021-09-12 12:21 ` Hans Hagen via ntg-context
1 sibling, 0 replies; 6+ messages in thread
From: Hans Hagen via ntg-context @ 2021-09-12 12:21 UTC (permalink / raw)
To: mailing list for ConTeXt users; +Cc: Hans Hagen
On 9/12/2021 9:45 AM, Wolfgang Schuster via ntg-context wrote:
> Marcel Fabian Krüger via ntg-context schrieb am 12.09.2021 um 01:12:
>> Hi,
>>
>> On Sun, Sep 12, 2021 at 12:01:08AM +0200, Hans Hagen wrote:
>>>> \definefontfeature
>>>> [default:test]
>>>> [default]
>>>> [cv36=2,cv26=6]
>>> What is the number supposed to indicate ? It is not an alternate, right?
>> Actually it is an alternate, but only partially.
>
> There is a table on the github page with the results from all alternatives.
>
> Look at section "Character Variats" on https://github.com/be5invis/Iosevka
With fonts like that we might end up in issues anyway:
\definefontfeature[default:test][default][mlxx=yes,wflm=yes]
\definedfont[file:iosevka.ttc(Iosevka)*default:test] :> <>
e.g.
WFLM Wolfram Language (Mathematica)
so we get font specific 4 char feature names that themselves have script
/ language specifications (like latin default and cyrillic serbian
wolfram) ... these could have been ss* features (after all, cv and ss
are wildcards and opentype has never been that consistent), not that it
matters much because it gets processed anyway, but it's a clear signal
that anyone can roll out adn use any feature name
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
-----------------------------------------------------------------
___________________________________________________________________________________
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://bitbucket.org/phg/context-mirror/commits/
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___________________________________________________________________________________
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2021-09-11 20:36 ConTeXt inserts additional dots for Iosevka font Marcel Fabian Krüger via ntg-context
2021-09-11 22:01 ` Hans Hagen via ntg-context
2021-09-11 23:12 ` Marcel Fabian Krüger via ntg-context
2021-09-12 7:45 ` Wolfgang Schuster via ntg-context
2021-09-12 11:43 ` Hans Hagen via ntg-context
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