Hi Bill: Check out the 'mem' and 'memcairo' drivers for plplot.
--Doug Hunt
dh...@ucar.edu
Software Engineer
UCAR - COSMIC, Tel. (303) 497-2611
On Fri, 20 Apr 2012, Schwab,Wilhelm K wrote:
I have a "working" interface to PLplot, but it relies on temporary disk files,
which is not at all attractive. Some time ago,
I asked how to avoid this and there were solutions, but not ones that were
within easy reach.
IIRC, one option was to set up a quad RGB buffer and use (Cairo?) to draw on
it. The problem was that I could not (or did not
know how to) readily use the data to draw (quickly at least) in my preferred
Smalltalk environment.
Recently, there are rumblings of Cairo support in Pharo Smalltalk, and I am
starting to wonder whether I might be able to
connect the dots in the near future. Am I describing something that makes any
sense?
Another option might to to create my own device driver. The web site says how
easy it is to do, but does not go into detail
that I could find. For example, Pharo readily uses some variations on RGB that
I might be able to exploit with a suitable
driver??
Comments/advice are welcome. This is something that will happen when the
pieces come together; for now, temp files are UGLY
but work.
Another topic: multiple plots at one time. IIRC, PLplot was not threadsafe
when I last checked. It would be nice to have a
way to open a few plots at one time and work on them "at leisure." Is that
possible to do? The fact that I do not recall
obtaining and passing "plot IDs" suggests to me that there are global data
structures and associated limitations??
Bill
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