Hi Martin and Tim, I also have this bug. Though I think not necessarily with all the same fonts as Martin.
Using Martin's code: https://imgur.com/a/ILUoe3H Fedora 39, Evince 45.0 It's a bug with Evince. I think. I think it's substituting in a font set that doesn't have all the required symbols. I think it should be possible to install the required fonts, but I haven't found a solution that way, yet. Nevertheless, the following should work, and may be a better solution anyway, given that embedding the fonts is probably more cross- platform/viewer friendly: You can embed the fonts if you have Ghostscript installed (I think it comes with Fedora already(?) if not then: sudo dnf install ghostscript ) You can then use the embedFonts() function in R: (pdfil <- paste0("plotmath-example_R", with(R.version, paste0(major, sub("[.]", "", minor))), ".pdf")) pdf(pdfil) example(plotmath); mtext(R.version.string) dev.off() # Use embedFonts to embed the fonts in the PDF embedFonts(file = pdfil, outfile = paste0("embedded-example", pdfil), options = "-dPDFSETTINGS=/prepress") if(interactive()) { system(paste("evince", paste0("embedded-example", pdfil), "&")) } Or you can do it in the terminal: gs -dNOPAUSE -dBATCH -dPDFSETTINGS=/prepress -sDEVICE=pdfwrite - dEmbedAllFonts=true -sOutputFile=plotmath-example-output_embedded.pdf - f plotmath-example_R432.pdf Compare: Embedded: ❯ pdffonts plotmath-example-output_embedded.pdf name type encoding emb sub uni object ID ---------------------- -------- -------- --- --- --- ------ --- KHEPSB+Helvetica Type 1C Custom yes yes no 10 0 WNPVSJ+Symbol Type 1C Custom yes yes no 12 0 MQBKOK+Helvetica-Bold Type 1C WinAnsi yes yes no 20 0 Original: ❯ pdffonts plotmath-example_R432.pdf name type encoding emb sub uni object ID ---------------------- -------- -------- --- --- --- ------ --- Helvetica Type 1 Custom no no no 16 0 Helvetica-Bold Type 1 Custom no no no 17 0 Symbol Type 1 Symbol no no no 18 0 I hope this works for you. Like I said, I *think* it's a problem with Evince so it's probably better to file a bug report with them, but I also think embedding fonts isn't such a bad idea anyway - you'll know the output will display as intended regardless of the viewer on the user's system. It does lead to a larger file-size, but I think these days we can live with that. Thanks, Peter On Mon, 2024-03-11 at 14:15 +0100, Martin Maechler wrote: > > > > > > Tim Taylor > > > > > > on Mon, 11 Mar 2024 11:42:35 +0000 writes: > > > Hi Martin > > Probably not the answer you're looking for but on the latest > Fedora 39 (workstation edition) both locally, and on a freshly > installed VM (with just R-core installed), all fonts render correctly > for me in evince. > > > $ evince --version > > GNOME Document Viewer 45.0 > > > $ R --version > > R version 4.3.3 (2024-02-29) -- "Angel Food Cake" > > Copyright (C) 2024 The R Foundation for Statistical Computing > > Platform: x86_64-redhat-linux-gnu (64-bit) > > > It may be worth sharing more details about your installation > (e.g. Fedora version) to see if anyone has any ideas. > > > Tim > > Thank you, Tim. > > > Fedora is 38 : > > $ lsb_release -a > LSB Version: :core-5.0-amd64:core-5.0-noarch:cxx-5.0-amd64:cxx- > 5.0-noarch:desktop-5.0-amd64:desktop-5.0-noarch:languages-5.0- > amd64:languages-5.0-noarch:printing-5.0-amd64:printing-5.0-noarch > Distributor ID: Fedora > Description: Fedora release 38 (Thirty Eight) > Release: 38 > Codename: ThirtyEight > > $ evince --version > GNOME Document Viewer 44.3 > > R version does not matter at all. > Same phenomenon in several versions of R I have installed > simultaneously (from source). > As I mentioned, I'm slightly misusing the list for non-R problem > that I encounter a lot with R {because I like to use > "plotmath"}, so I apologize in advance. > > Maybe it's rather a matter of fonts installed in > /usr/share/fonts/ ?? > > Martin > > > On Mon, 11 Mar 2024, at 10:51 AM, Martin Maechler wrote: > >> This problem has bugged me for several years now, > >> and our own IT staff has tried a few things, but then never > >> cared enough to persist fixing it. > >> > >> It *is* a bug in evince, the standard pdf viewer on Fedora and > >> IIUC also quite few other Linux distributions, and > >> *not* a bug in R; hence I am asking for help/hints here. > >> > >> A very simple example: > >> > >> -------------------------------------------------------------- > ----------------- > >> > >> (pdfil <- paste0("plotmath-example_R", > >> with(R.version, paste0(major, sub("[.]", "", minor))), > ".pdf")) > >> ## "plomath-example_R433.pdf" > >> > >> pdf(pdfil) > >> example(plotmath); mtext(R.version.string) > >> dev.off() > >> > >> if(interactive()) > >> system(paste("evince", pdfil, "&")) > >> > >> -------------------------------------------------------------- > ----------------- > >> > >> The pdf contains 4 pages, and in all of them *some* of the > math > >> symbols are replaced by open rectangles -- because evince does > >> not find the fonts it should. > >> > >> E.g. > >> - page 1: \pi is properly shown, \phi not > >> - page 2: all greek letters, \theta, \xi, \eta are *not* > shown > >> ... > >> > >> Simply typing > >> > >> example(plotmath) > >> > >> in the R console will show you everything as it should be but > is > >> not for us, using evince. > >> > >> However, *everything* is rendered correctly, if I use very old > >> 'xpdf' {which you may have to install > >> > >> ## OTOH: This always work fine with the very old 'xpdf' : > >> system(paste("xpdf", pdfil, "&")) > >> > >> So the fonts *are* somewhere on my machine, but evince does > not > >> find them; > >> > >> How should our IT people fix this? > >> > >> IIRC they did install the Zapf Dingbats fonts -- which then > are > >> found by xpdf but not by evince ? > >> > >> > >> Thank you in advance, > >> Martin > >> > >> _______________________________________________ > >> R-SIG-Fedora mailing list > >> R-SIG-Fedora@r-project.org > >> https://stat.ethz.ch/mailman/listinfo/r-sig-fedora > >> > > > [[alternative HTML version deleted]] > > _______________________________________________ > R-SIG-Fedora mailing list > R-SIG-Fedora@r-project.org > https://stat.ethz.ch/mailman/listinfo/r-sig-fedora _______________________________________________ R-SIG-Fedora mailing list R-SIG-Fedora@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-fedora
