From: Hans Hagen <j.hagen@xs4all.nl>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>,
Pablo Rodriguez <oinos@gmx.es>
Subject: Re: issues with optical bounds
Date: Sun, 18 Nov 2018 22:37:00 +0100 [thread overview]
Message-ID: <2aec8be3-4f0b-68b8-7ba4-91243e9da772@xs4all.nl> (raw)
In-Reply-To: <c16ebb24-2da4-6962-250e-da9787cbd003@gmx.es>
On 11/18/2018 10:22 PM, Pablo Rodriguez wrote:
> Hi Hans,
>
> many thanks for having released the new beta.
>
> I experience opposite results with opbd. The first sample is:
>
> \definefontfeature[default][default][protrusion=quality, opbd=yes]
> \definefontfamily[mainface][rm][Linux Libertine O]
> \setupbodyfont[mainface, 300pt]
> \setuppagenumbering[location=]
> \setupalign[hanging]
> \showframe
> \starttext
> W
> \stoptext
>
> Although the value for that lfbd is only -29, the W is moved too much
> from its original position.
i have no time now but keep in mind that we also have a multiplier (the
system is set up to use ratios / fractions, not hard coded numbers
also, it makes no sense to experiment too much with only some demo fonts
with incomplete coverage ... adapting the low level mechanism to just
one font with one character protruding makes no sense (one can tnen
better use the non-opbd way)
> The second sample is (font attached at
> https://mailman.ntg.nl/pipermail/ntg-context/2018/092527.html):
>
> \showframe
> \definefontfeature[default][default][protrusion=quality, opbd=yes]
> \definefontfamily[mainface][rm][TestOPBD]
> \setupbodyfont[mainface, 60pt]
> \setupalign[hanging]
>
> \starttext
> Ἠ\\
> Ἠ\hfill Ἠ\\
> Ἦ\hfill ὩὩ\\
> ἯἯ\hfill ὩὩ
> \stoptext
>
> Here the changes are tiny. The right values are used in the image at
> https://github.com/wspr/fontspec/issues/282#issuecomment-287155442.
>
> Could you check it?
>
> Many thanks for your help,
>
> Pablo
>
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next prev parent reply other threads:[~2018-11-18 21:37 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-18 21:22 Pablo Rodriguez
2018-11-18 21:37 ` Hans Hagen [this message]
2018-11-19 20:27 ` Pablo Rodriguez
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