Re: [Plplot-general] *cairo driver options.

[James T. <jt...@gm...>]

On 20 September 2012 19:17, Alan W. Irwin <ir...@be...> wrote:

> On 2012-09-19 15:51-0600 James Tappin wrote:
>
>  Is there a list anywhere of the driver options for the various cairo
>> drivers? Particularly any to set image or page sizes and for pscairo is
>> there a way to produce encapsulated output?
>>
>>
> Hi James:
>
> Thanks for your interest in PLplot.
>
> To answer your questions in order
>
> 1. To get a list of drvopt options pecify a bad driver option, e.g.,
>
> examples/c/x01c -dev pscairo -drvopt xxxxx
>
> 2. Of course, driver options are not the whole story, and, for example,
> you can specify the size of at least the xcairo result (and possibly
> other cairo devices?) with the general -geometry option.
>
> 3. Our cairo device driver depends on the pango/cairo combination of
> libraries, and I believe its a limitation of cairo's PostScript backend
> (what we use for the pscairo device), that encapsulated PostScript is
> not supported.  However, it is not too bad since you can run
> single-page -dev pscairo results through ps2eps to produce encapsulated
> PostScript.
>
> Note another set of high-quality devices are implemented by
> our qt device driver.  In that case, -dev epsqt does produce
> encapsulated PostScript directly.
>
> Alan
>

Thanks Alan,

The epsqt driver does deliver what I need, although on one machine I get a
warning:
      QGtkStyle cannot be used together with the GTK_Qt engine.
(I think that is related to the engine that I use to get Gtk widgets to
match my KDE style).

In principle I would think that the cairo driver should be able to do eps
via the  cairo_ps_surface_set_eps<http://www.cairographics.org/manual/cairo-PostScript-Surfaces.html#cairo-ps-surface-set-eps>function.

BTW: You may be itnerested to see what we've been doing in integrating
plplot into Gtk-fortran (https://github.com/jerryd/gtk-fortran/wiki).

James