[dvipdfmx] black color lost

[Shunsaku Hirata]

Hi all,

Sorry for very late reply.

> I will try changing dvipdfmx code to always write color changes.

Already done. This issue should have been fixed.

Thanks,
Shunsaku Hirata


2019年8月16日(金) 22:20 Shunsaku Hirata <shunsaku.hirata74 at gmail.com>:
>
> Hi Ulrike,
>
> Thank you for reporting.
>
> I'm not very sure but this issue is probably due to the following
> kind of code:
>
> \documentclass{article}
> \begin{document}
> \special{pdf:bcolor [0]}
> \special{pdf:code q 1 0 0 rg 1 0 0 RG}
> \special{color push gray 0}
> Text in black.
> \special{color pop}
> \special{pdf:code Q}
> \special{pdf:ecolor}
> \end{document}
>
> "Text in black" above is drawn in red.
>
> This occurs because dvipdfmx does not know that current color
> is changed to "red" via pdf:code (dvipdfmx does not verify the
> content of "pdf:code" special) and then it wrongly assumes
> actual color change does not occur when "color push gray 0" is
> invoked. Dvipdfmx does not output color change operators
> ("0 g 0 G") since it mistakenly consider them unnecessary.
>
> I will try changing dvipdfmx code to always write color changes.
>
> Thanks,
> Shunsaku Hirata
>
> 2019年8月16日(金) 18:54 Ulrike Fischer <news3 at nililand.de>:
> >
> > On tex.sx a problem was reported that with xelatex  some color
> > settings are lost in a pgfplots
> >
> > https://tex.stackexchange.com/questions/504279/xelatex-with-pgfplots-displays-wrong-color
> >
> > In this example the axis is green despite the setting \pgfplotsset{axis line style=black}
> >
> >
> > I couldn't make a smaller example without pgfplots, but it could be
> > that is isn't a pgfplots problem but has someting to do with dvipdfmx:
> >
> > If works if one use a gray color (\pgfplotsset{axis line
> > style=black!50}) instead:
> >
> > \documentclass[]{article}
> > \special{dvipdfmx:config z 0}
> > \usepackage{xcolor}
> > \usepackage{tikz}
> > \usepackage{pgfplots}
> > \pgfplotsset{axis line style=black} %works with e.g. black!50
> > \color{green}
> > \begin{document}\showoutput
> >
> >     \begin{tikzpicture}
> >         \begin{axis}
> >          \addplot {x*x};
> >         \end{axis}
> >     \end{tikzpicture}
> > \end{document}
> >
> > The specials shown by showoutput are identical, only that the working
> > example uses
> >
> > ............\special{color push gray 0.5}
> > ............\special{color push gray 0.5}
> >
> > instead of
> >
> > ............\special{color push gray 0}
> > ............\special{color push gray 0}
> >
> >
> > but the pdf stream shows 0.5 G 0.5 g in the working example with gray but
> > nothing in the failing.
> >
> >
> >
> > --
> > Mit freundlichen Grüßen
> > Ulrike Fischer
> >
> >