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« Return to Thread: x11: slow drawing after set xtics font
Re: x11: slow drawing after set xtics font
by Petr Mikulik
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> > > If the drawing gets so slow, it seems that the server searches the font list
> > > for each tic for font "*", right? Cannot this be eliminated?
> > >
> > > I think that Octave should produce gnuplot code like:
> > >
> > > set terminal x11 font "arial"
> > > set title "Hello world" font ",12"
> > >
> > > instead of
> > >
> > > set terminal x11
> > > set title "Hello world" font "*,12"
>
> But I am puzzled why Octave would ever want to pass "*" as a font name.
> > > for each tic for font "*", right? Cannot this be eliminated?
> > >
> > > I think that Octave should produce gnuplot code like:
> > >
> > > set terminal x11 font "arial"
> > > set title "Hello world" font ",12"
> > >
> > > instead of
> > >
> > > set terminal x11
> > > set title "Hello world" font "*,12"
>
> But I am puzzled why Octave would ever want to pass "*" as a font name.
What I can see on my Linux is that
gnuplot> set title "Hello world" font ",20"; p x
gnuplot> set title "Hello world" font "*,20"; p x
show the same drawing, while in
gnuplot> set title "Hello world" font ",22"; p x
gnuplot> set title "Hello world" font "*,22"; p x
the case ",22" shows an ugly text.
> > The problem the octave developers have is that identifying a font
> > that reliably works for x11, aqua and windows ...
> > and hopefully works for the other terminals as well.
>
> I am afraid that is impossible. Neither Octave nor gnuplot has any
> control over what fonts are available on a user's system, and different
> terminal types intrinsically use different types of fonts.
Cannot it get the list via xlsfont, GDFONTPATH, etc. and then use
arial/verdana/helvetica/ (i.e. the usual ttf and postscript fonts)?
> The right thing to pass is either no font option at all (which on all
> terminals should yield a usable default), or ",12" which will
> yield that same default font in a particular size.
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