* modify kern between two glyphs
@ 2022-04-05 11:02 mf via ntg-context
2022-04-05 11:15 ` Thomas A. Schmitz via ntg-context
0 siblings, 1 reply; 6+ messages in thread
From: mf via ntg-context @ 2022-04-05 11:02 UTC (permalink / raw)
To: mailing list for ConTeXt users; +Cc: mf
Hello list,
I need to modify the kern between two glyphs.
This is a MWE where the problem is solved manually:
------------------------------------------
\mainlanguage[it]
\starttext
Default: «Questo è successo nel ’48».
Desired: «Questo è successo nel ’\kern-.1em 48».
\stoptext
------------------------------------------
Is it possible to solve it globally and only for a single font?
Thanks,
Massi
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: modify kern between two glyphs
2022-04-05 11:02 modify kern between two glyphs mf via ntg-context
@ 2022-04-05 11:15 ` Thomas A. Schmitz via ntg-context
2022-04-05 11:45 ` mf via ntg-context
0 siblings, 1 reply; 6+ messages in thread
From: Thomas A. Schmitz via ntg-context @ 2022-04-05 11:15 UTC (permalink / raw)
To: mailing list for ConTeXt users; +Cc: Thomas A. Schmitz
> On 5. Apr 2022, at 13:02, mf via ntg-context <ntg-context@ntg.nl> wrote:
>
> Is it possible to solve it globally and only for a single font?
>
> Thanks,
> Massi
Have you looked at chapter 5.4 “Goodies” of fonts-mkiv.pdf? That should get you started.
Thomas
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: modify kern between two glyphs
2022-04-05 11:15 ` Thomas A. Schmitz via ntg-context
@ 2022-04-05 11:45 ` mf via ntg-context
2022-04-05 11:54 ` Hans Hagen via ntg-context
0 siblings, 1 reply; 6+ messages in thread
From: mf via ntg-context @ 2022-04-05 11:45 UTC (permalink / raw)
To: Thomas A. Schmitz via ntg-context; +Cc: mf
Il 05/04/22 13:15, Thomas A. Schmitz via ntg-context ha scritto:
>
>
>> On 5. Apr 2022, at 13:02, mf via ntg-context <ntg-context@ntg.nl> wrote:
>>
>> Is it possible to solve it globally and only for a single font?
>>
>> Thanks,
>> Massi
>
> Have you looked at chapter 5.4 “Goodies” of fonts-mkiv.pdf? That should get you started.
>
Thanks Thomas,
there seems to be nothing for that in the "Goodies" chapter.
I'd already found \setextrafontkerns at "8.12 Extra font kerns" of the
same manual.
It's defined in typo-fkr.lua, but I can't understand what parameters to
pass and whether it's the right macro. It looks like it's not.
I'm expecting there's a lua font table with glyph pairs kerning to update.
Massi
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: modify kern between two glyphs
2022-04-05 11:45 ` mf via ntg-context
@ 2022-04-05 11:54 ` Hans Hagen via ntg-context
2022-04-05 12:34 ` mf via ntg-context
0 siblings, 1 reply; 6+ messages in thread
From: Hans Hagen via ntg-context @ 2022-04-05 11:54 UTC (permalink / raw)
To: mf via ntg-context; +Cc: Hans Hagen
On 4/5/2022 1:45 PM, mf via ntg-context wrote:
> It's defined in typo-fkr.lua, but I can't understand what parameters to
> pass and whether it's the right macro. It looks like it's not.
look at the extension examples in the test suite: you can define a kern
pair positioning feature than you enable for just that font
Hans
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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: modify kern between two glyphs
2022-04-05 11:54 ` Hans Hagen via ntg-context
@ 2022-04-05 12:34 ` mf via ntg-context
2022-04-05 13:29 ` mf via ntg-context
0 siblings, 1 reply; 6+ messages in thread
From: mf via ntg-context @ 2022-04-05 12:34 UTC (permalink / raw)
To: Hans Hagen via ntg-context; +Cc: mf
Il 05/04/22 13:54, Hans Hagen via ntg-context ha scritto:
> On 4/5/2022 1:45 PM, mf via ntg-context wrote:
>
>> It's defined in typo-fkr.lua, but I can't understand what parameters
>> to pass and whether it's the right macro. It looks like it's not.
> look at the extension examples in the test suite: you can define a kern
> pair positioning feature than you enable for just that font
>
Thanks Hans, here's the working MWE:
-------------------------------------------------------
\mainlanguage[it]
% from http://www.pragma-ade.com/context/latest/cont-tst.zip
% file doc/context/tests/mkiv/fonts/extensions-001.tex
\startluacode
fonts.handlers.otf.addfeature {
name = "ktest",
type = "kern",
data = {
[ '’' ] = { [ '4' ] = -100 },
}
}
\stopluacode
\definefontfeature[ktest][ktest=yes]
\starttext
Default: «Questo è successo nel ’48».
Desired: «Questo è successo nel ’\kern-.1em 48».
Solved: \feature[+][ktest]«Questo è successo nel ’48».
\stoptext
------------------------------------------------------
Massi
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^ permalink raw reply [flat|nested] 6+ messages in thread* Re: modify kern between two glyphs
2022-04-05 12:34 ` mf via ntg-context
@ 2022-04-05 13:29 ` mf via ntg-context
0 siblings, 0 replies; 6+ messages in thread
From: mf via ntg-context @ 2022-04-05 13:29 UTC (permalink / raw)
To: ntg-context; +Cc: mf
There's a problem with oldstyle glyphs, because they have different
codes inside a font.
I used fontforge to find the "four.oldstyle" glyph, whose code is 0xf734.
But then I discovered that the 'four.oldstyle' key works the same in the
lua table.
This is the updated MWE, suitable for oldstyle glyphs too.
--------------------------------------------------
\mainlanguage[it]
% modified from http://www.pragma-ade.com/context/latest/cont-tst.zip
% file: doc/context/tests/mkiv/fonts/extensions-001.tex
\startluacode
fonts.handlers.otf.addfeature {
name = "ktest",
type = "kern",
data = {
[ '’' ] = {
[ '4' ] = -100,
[ 0xf734 ] = -150, -- four.oldstyle code
-- [ 'four.oldstyle' ] = -150, -- this is the same as the
previous line
},
}
}
\stopluacode
\definefontfeature[ktest][ktest=yes]
\definefontfeature[onum][onum=yes]
\starttext
Default: «Questo è successo nel ’48».
Desired: «Questo è successo nel ’\kern-.1em 48».
Solved: \feature[+][ktest]«Questo è successo nel ’48».
Onum: \feature[+][onum]«Questo è successo nel ’48».
\stoptext
--------------------------------------------------
Massi
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___________________________________________________________________________________
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2022-04-05 11:02 modify kern between two glyphs mf via ntg-context
2022-04-05 11:15 ` Thomas A. Schmitz via ntg-context
2022-04-05 11:45 ` mf via ntg-context
2022-04-05 11:54 ` Hans Hagen via ntg-context
2022-04-05 12:34 ` mf via ntg-context
2022-04-05 13:29 ` mf via ntg-context
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