[XeTeX] Font strangeness

Stephen Moye stephenmoye at mac.com
Tue May 24 11:01:44 CEST 2005

Optical sizes -- that was it! Thanks so much! Your idea of a two-step approach is very nice. Thanks!

Stephen Moye

On Tuesday, May 24, 2005, at 02:47AM, Jonathan Kew <jonathan_kew at sil.org> wrote:

>On 24 May 2005, at 12:41 am, Stephen Moye wrote:
>> The following bit of plain TeX is used to fit some text into a given 
>> space. Everything works fine with every other OpenType font I have. 
>> There seems to be a problem with the new Adobe Garamond Premium Pro. 
>> For some reason that I cannot fathom the resulting text is 
>> considerably shorter than it should be. Any ideas?
>I don't have that font, so can't attempt to reproduce whatever you're 
>seeing. But I have a guess: does this font have a range of optical 
>sizes? If so, it won't scale linearly as you might expect, because 
>XeTeX will pick the most appropriate face from the set for the size you 
>You can disable this behavior by adding "/S=0" to the font name, and 
>then it will simply use the face named in the \font command. Or you can 
>use "/S=##" where ## is the desired optical size if you want to use 
>(even if that differs from the "at size"). Thus, \font\x="Garamond 
>Premier Pro/S=36" at .1pt will load whatever optical face of GPP would 
>be used at 36pt, but scaled to 0.1pt.
>Assuming that's the cause of your problem, you could be sophisticated 
>and use a two-step solution: first an approximation to select a 
>suitable optical face, then re-measure using that size with /S=## in 
>order to calculate the exact scaling to use.
>HTH,   JK
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