l3backend: adding new DVI specials?
martin.gieseking at uos.de
Sun Feb 16 13:10:55 CET 2020
Am 13.02.2020 um 08:54 schrieb Joseph Wright:
> Initially, we simply added everything as \special lines directly
> containing the PostScript, but that leads to warnings with dvipdfmx if
> the right backend isn't selected. It also meant there was lots of
> material in the \showbox output. Moving it to a .pro file meant that
> inclusion used only one line
> and this line is simply ignored by dvipdfmx. We realised that other
> systems might not know this one line, but felt that it was hopefully
> possible that a similar '"skip header=" lines' might be added to any
> cases. The one we had in mind was dvisvgm: I'm not familiar with pyxplot.
Karl told me about this this discussion a couple of hours ago. So here's
a slightly delayed info on dvisvgm regarding "header=" specials:
dvisvgm supports all dvips specials including "header=" and processes
them accordingly. Actually, it nicely converts most DVI files created
with the dvips backend. Therefore it shouldn't be necessary to change
the handling of "header=" specials. dvisvgm will most likely swallow the
planned additional special unnoticed.
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