On Aug 16, 2007, at 2:04 AM, Alan W. Irwin wrote:
>> Ok. My latest commit may have gotten this all sorted out. I'm a
>> little puzzled why the PLplot library doesn't just pass the driver
>> the right transform matrix for the new orientation since it is
>> going to the effort of rotating everything else.
>
> The aspect ratio of the letters and symbols is incorrect with -
> portrait mode.
> To see this look at example 1 where the circular symbols have been
> turned
> into ellipses.
>
> If you compare the results of
>
> ./x01c -a .75 -ori 1 -dev pscairo -o test2.ps
>
> and
>
> ./x01c -portrait -dev pscairo -o test3.ps
>
> they should be closely similar, but they are not. test2.ps is very
> similar
> to what you get with
>
> ./x01c -portrait -dev psc -o test1.ps
>
> or
>
> ./x01c -freeaspect -ori 1 -dev psc -o test0.ps
>
> (which produces an identical plot to test1.ps).
>
> In other words, it appears the -a and -ori options are working fine
> for
> pscairo, but -portrait is not for some reason. If you do the further
> command
>
> ./x01c -freeaspect -ori 1 -dev pscairo -o test4.ps
>
> you will find the result is correct (i.e., virtually identical to
> test2.ps
> above). Thus, pscairo is really close, and the issue simply boils
> down to
> why does -portrait not produce identical results to -freeaspect -
> ori 1 for
> the pscairo driver? I just now had a look at cairo.c, and the
> naive answer
> is you forgot to set pls->freeaspect = 1; in that driver for the -
> portrait
> case (at least for revision 7806 which is what "svn update" gives
> me for
> trunk at the moment). I tried setting that myself locally in the
> if(pls->portrait){ block, but it made no difference (which I
> frankly don't
> understand since that logic followed what works in the ps.c case.)
>
> Anyhow, with "-freeaspect -ori 1" giving correct results for
> pscairo, I hope
> it is easy for you to figure out what the problem is with the -
> portrait
> option for pscairo.
I tried to follow ps.c more closely. Does pscairo (i.e. version 7808
+) work correctly now?
-Hazen
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