From: Hans Hagen <pragma@wxs.nl>
To: news3@nililand.de, mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: Re: Incorrect math kerning
Date: Mon, 30 May 2016 18:01:01 +0200 [thread overview]
Message-ID: <126a4978-95bf-fcdc-87bf-f81eba14be6e@wxs.nl> (raw)
In-Reply-To: <cm41et8r9hu3.dlg@nililand.de>
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On 5/30/2016 4:56 PM, Ulrike Fischer wrote:
> Am Mon, 30 May 2016 09:35:25 +0200 schrieb Hans Hagen:
>
>> In cambria staircase kerns are used for this but they are not defined
>> for all (base) characters.
>
> Are this these values:
>
> ["math"]={
> ["kerns"]={
> ["bottomright"]=36,
> ["topright"]=17,
> },
> },
>
>
> ? If yes, how could one change them to check if other values gives a
> better result?
I looked into it a bit and found a few issues.
(1) i forgot to adapt the scaler to the new fontloader so i fixed that
(no beta yet)
(2) the old (ff) loader makes up some values which is probably a side
effect of the at that time missing spec; it's harmless and ok but
results in different tables between old and new loader
(3) you're right about the spot to patch or add but keep in mind that
you look at the packed font table, so in the end you end up with something:
kerns = {
[0x1D449] = { bottomright = { { kern = -200 } } }, -- it V
[0x1D44A] = { bottomright = { { kern = -100 } } }, -- it W
}
the amount of kerning is subjected to personal preferences e.g. lucida
has way less bottom kerning than cambria for instance
attached a sample for italic V and W
- native lucida ot kerning
- native cambria kerning
- specified for other fonts
Hans
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next prev parent reply other threads:[~2016-05-30 16:01 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-30 3:50 Aditya Mahajan
2016-05-30 7:35 ` Hans Hagen
2016-05-30 14:56 ` Ulrike Fischer
2016-05-30 16:01 ` Hans Hagen [this message]
2016-05-30 17:08 ` Hans Hagen
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