On Wed 28th Jul, 2010 at 03:00, Ernest Adrogué seems to have written:

27/07/10 @ 20:47 (+0100), thus spake cfr...@imapmail.org:
On Tue 27th Jul, 2010 at 09:48, Khaled Hosny seems to have written:

On Tue, Jul 27, 2010 at 02:36:45AM +0200, Ernest Adrogué wrote:
23/07/10 @ 17:12 (+0200), thus spake enrico.grego...@univr.it:
Hi!

Is it possible to generate fake old-style figures & small
capitals for fonts missing these glyphs with XeTeX.
I used to use the mathpoz package that does exactly that,
but something tells me it's not compatible with XeTeX.


I guess it's the "mathpazo" package, for Palatino. You can
substitute the text font with the TeX Gyre version:


\usepackage{mathpazo}
\setmainfont[Numbers=OldStyle]{TeX Gyre Pagella}


With declarations in this order, XeLaTeX should be happy: and indeed it is,
I've tried compiling the documentation of amsmath and all goes well.

I'll have to study this in more detail.
I thought that "mathpazo" generated the small-caps and old-style
figures by itself, but it seems that it doesn't.

Though there are some DTP and office applications that fake small caps,
I've never seen one that fakes oldstyle figure, I don't think it is even
possible.

                                        It simply selects
another font wich is URW Palladio with real small-caps and old-style
figures added. I don't know what's the point in having a version of
URW Palladio without small-caps and another one with, all in the
same LaTeX installation.

Traditional TeX engines can only use small caps if they are in a separate
font.

Just to clarify, this, you need separate TFM files, but it is perfectly
OK for the small caps to be in the same font in the sense of being in
the same pfb (or ttf for pdflatex which is not quite traditional, of
course). This amounts to having them in separate fonts as far as TeX is
concerned but the actual glyphs can all be in the same type 1 font.

My comment here concerned the way traditional TeX engines work - not
XeTeX. (Though I believe XeTeX sometimes falls back to a similar system
but only as a last resort. Not sure, though.)

Right now, I have two fonts with old-style numbers.
One, Linux Libertine, a true-type font.
Two, PFL Neu, a type 1 font based on URW Palladio.
These both have old-style figures in the same file, and I have seen
with Font Forge that the glyphs are labeled the same: zero.oldstyle,
one.oldstyle... etc.

However, I cannot use the old-style figures from the type1 font.
It prints a warning saying that the OpenType feature 'Numbers=OldStyle'
is not available.

Why can't XeTeX find the o.s. numbers? Is it a limitation of type 1
fonts?

Yes. Type 1 fonts do not have OpenType features. They are a feature of
OpenType fonts.

If I put the old-style glyphs in a different file, and load the font
with the SmallCapsFont=<file> option, then it still prints the warning
about old-style numbers not available, but you can actually get o.s.
figures selecting small-caps, e.g. \textsc{12345}. Whereas \textup{123}
uses normal figures. It's not ideal, but it works. The problem is that
it's inconsistent, because the true-type font is insensitive to
\textsc \textup as long as o.s. figures are concerned, it only  obeys
the OpenType feature "Numbers" option.

Hopefully somebody else will answer this!

- cfr


Any comment appreciated :)


Cheers.
Ernest





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