Hi André, This patch fixes the problem for me (although I still get the warning, as you say).
Many thanks for your very quick help, Thomas On Thu, 24 Jun 2021 at 19:16, André Wobst <[email protected]> wrote: > Hi, > > I could reproduce it on Debian 11 (not yet released). It seems related > to the upgrade to TeX Live 2020, which added the l3backend (was not > present before). This package adds specials by \AtBeginDvi{...}, which > unboxes the box send to \shipout and re-boxes it. By that the vertical > alignment, which we set to zero height for the hbox passed to \shipout, > gets lost at the first box shipped out by PyX. > > There is a simple solution in applying this vertical setting at the box > nested inside, before we also fix the horizontal alignment according to > the output requirements. This should not introduce any difference for > regular use, although (as it is TeX/LaTeX) any difference can always be > utilized (as the l3backend shows). Please try the attached patch. I hope > it resolves the issue for you. (And we probably should release this soon > ...) > > > André > > PS: The additional special output (warning by PyX) has not yet been > addressed/silenced. Also, I have not yet checked whether we can continue > to use the pyx.def output driver as before. There are various open > questions, which need further investigation ... > > Am 22.06.21 um 20:11 schrieb Thomas Bending: > > I've used PyX happily for years, but I've recently noticed what seems to > > be a bug in text placement when using LaTeX for text processing. Here's > > my code: > > > > import pyx > > pyx.text.set(engine = pyx.text.TexEngine) > > c = pyx.canvas.canvas() > > c.text(0, 0, 'A') > > c.text(0, 0, 'B') > > c.writePDFfile('out.pdf') > > > > This produces the file attached as out_tex.pdf, with the A and B > > superimposed as I'd expect. However, if I change the engine specified in > > line 2 to pyx.text.LatexEngine then > > > > 1. I see the warning /ignoring special 'header=l3backend-dvips.pro > > <http://l3backend-dvips.pro>'/ > > 2. The script produces the file attached as out_latex.pdf, with the A > > displaced downwards (and hence almost off the page). > > > > I'm using PyX 0.15, Python 3.9.5, TeX = TeX 3.14159265 (TeX Live > > 2020/Debian) and LaTeX = pdfTeX 3.14159265-2.6-1.40.21 (TeX Live > > 2020/Debian), all running under Ubuntu 21.04. I believe that this issue > > appeared when I upgraded to Ubuntu 21.04, which may also have involved > > upgrades to some of these packages. > > > > Can anyone suggest what I can do to prevent this displacement of the > > text when using the LaTeX engine, please? Is this displacement related > > to the warning? Any advice welcomed, > > > > Thomas > > > > > > > > _______________________________________________ > > PyX-user mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/pyx-user > > > > -- > by _ _ _ > / \ \ / ) Dr. André Wobst, [email protected], https://www.wobsta.de > / _ \ \/\/ / wobsta GmbH, Ulmer Straße 248, 86156 Augsburg, Germany > (_/ \_)_/\_/ Office: +49 (0)821 90796043, Mobile: +49 (0)160 93804217 >
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