On Mon, 25 Jan 2021, Henning Hraban Ramm wrote:
>
> > Am 25.01.2021 um 17:31 schrieb Hans Hagen <j.ha...@xs4all.nl>:
> >
> >> If nobody has better advice, I’ll try to come up with a filter setup. That
> >> would mean we’d avoid the tikz module, every TikZ diagram will get written
> >> to a buffer of configurable name, and that (with preamble setup) will get
> >> run through LaTeX. I read pgf had some restrictions in plain TeX mode, but
> >> perhaps we can also use LuaTeX in plain mode to avoid the LaTeX dependency.
> > In the following case the buffer only gets typeset when it changes:
>
> Thank you (and Henri)! But we’d need to include the same setup header every
> time, so the filter module is probably really the best way.
It is not only the tikz setup; you also need to copy the font setup etc.
\typesetbuffer[setups,figure]
or some variant of that should also work. But the filter module does make it
easier to store the results in another directory so that they are out of sight.
> There’s just a problem with labels, I guess, if I go the filter-LaTeX or
> filter-TeX route. So filter-ConTeXt might make sense.
> I think I understand now why integrating MetaPost made a lot of sense.
Here is a simple example:
\usemodule[filter]
\startbuffer[tikz-before]
\usemodule[tikz]
\startTEXpage
\starttikzpicture
\stopbuffer
\startbuffer[tikz-after]
\stoptikzpicture
\stopTEXpage
\stopbuffer
\defineexternalfilter
[externaltikz]
[
bufferbefore=tikz-before,
bufferafter=tikz-after,
cache=yes,
filtercommand={context --batchmode \externalfilterinputfile\space
--purgeall --result=\externalfilteroutputfile},
output={\externalfilterbasefile.pdf},
readcommand=\readPDFfile,
]
\define[1]\readPDFfile{\externalfigure[#1]} % width and height could be added
\starttext
\startexternaltikz
\draw (0,0) -- (1,1);
\stopexternaltikz
\stoptext
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