Hi Alan
> > There are many other examples and demos in the plplot distribution which
> > show off plplot in all its glory. Do we really need to complicate these
> > "output driver" demos with code which essentially duplicates what's already
> > in other examples?
>
> One purpose of the examples is to test PLplot capabilities. I am concerned
> that extXdrawable_demo.c only exercises 7 PLplot commands (counting plsdev,
> plsetopt, plinit, and plend) so there might be hidden issues in the way this
> output driver is implemented which are not encountered because PLplot
> capabilities are exercised so little.
Sure. As a side note however, keep in mind that the extXdrawable "driver"
isn't actually a separate driver in its own right. Its functionality is
triggered by supplying an option ("external_drawable") to the standard
xcairo driver. This option causes the xcairo code to use a preallocated X
Drawable rather than creating its own. Aside from that, xcairo works in
exactly the same way that xcairo normally works.
Having said that, I acknowledge your interest in wanting to exercise the API
more fully in this alternative context.
> I acknowledge I am paranoid about testing, but that paranoia got an energy
> boost today when I noticed the missing text in the ext-cairo-test results.
> :-)
I understand. It's certainly better to catch bugs before release.
> > [out of order] For someone who just wants to see how to use these
> > specific features, they then need to trawl through all this extra
> > generic plplot code to get to the stuff they want (assuming that they
> > don't completely overlook the bits they need).
>
> Good point which could/should be addressed by carefully segregating the
> PLplot commands (e.g., using a separate routine) from the rest of the demo
> source and documentating that segration within the code.
This I think would be very important to ensure.
Regards
jonathan
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