Interesting. I did not have the package installed, but I did at some
point extract Helvetica from some MacOSX font files and R was using that
just fine until 3.3. This is how the plot looks in 3.4 (still using
Helvetica): https://ptpb.pw/HikX.pdf . After removing Helvetica,
installing the ttf-mscorefonts-installer package, and running fc-cache
--force the plot looks like this: https://ptpb.pw/CM8A.pdf
Also note that the standard pdf device works fine:
https://ptpb.pw/3Ml1.pdf , it's just the cairo devices (both pdf and
svg) that have the issue. Unfortunately I need to use cairo_pdf due to
unicode characters in axis labels.
Cheers, Ilia
-------- Original Message --------
Subject: Re: [Rd] italic font on cairo devices in R 3.4
Date: 2017-07-07 18:17:34 +0200
From: frederik
To: Ilia Kats
CC: r-devel, r-help
Hi Ilia,
I'm running Arch Linux, R 3.4.0.
Here's my test.pdf from your minimal example: https://ptpb.pw/HxsA.pdf
It doesn't look pixelated to me...
Here's a post that I wrote when I solved my last font problem in R,
almost 2 years ago:
https://stackoverflow.com/a/40940331/5087283
I had to install some Microsoft font packages, which is sad, because
there are some perfectly good free fonts that R could be using
instead. It could be considered a bug that R requires Microsoft fonts,
at least by default. However, does this even fix your problem? I.e. if
you install the corresponding Debian Microsoft font packages, does the
text appear anti-aliased?
Frederick
On Fri, Jul 07, 2017 at 10:30:46AM +0200, Ilia Kats wrote:
[cross-post from R-help]
Hi all,
I have the following problem: Since R 3.4.0, italic fonts rendered on Cairo
devices appear pixelated. Here's a minimal example:
cairo_pdf('test.pdf')
plot(1:10, ylab=expression(italic(test)))
dev.off()
The same problem occurs with bolditalic, but not bold. I am using Debian
Stretch. Several friends tried the same on their machines, another Debian
machine has the same problem. On MacOSX the output was not pixelated, but it
wasn't italic either. Ubuntu 16.04.2 xenial works fine. My impression is
that R somehow can't find the proper font to use and falls back to something
weird. Ideas?
Note that I'm not subscribed to the list, so please CC me in replies.
Cheers, Ilia
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