Re: Non-GUI mode: "assertion `GDK_IS_SCREEN (screen)' failed" in 0.93?

[Hans Breuer <Hans Breuer org>]

At 09:46 09.06.04, W. Borgert wrote:
> On Wed, Jun 09, 2004 at 12:46:31AM +0200, Colin Marquardt wrote:
> > I am running "Dia version 0.93, compiled 18:44:44 Jun  8 2004" on
>
> I'm using either
> Dia version 0.93, compiled 01:21:56 May 27 2004 (official package)
> or
> Dia version 0.93+cvs, compiled 07:06:55 Jun  9 2004 (self-compiled)
> on Debian GNU/Linux (sid).
>
> > When trying to convert from the command line (in order to use the
> > --size switch eventually), I get:
> >
> > $ dia --export-to-format=png ToplevelStateMachine.dia
>
> The following works for me with version 0.93:
>
> dia --export=UML-demo.png --size=100x100 --nosplash UML-demo.dia
>
> Unfortunately, this does not work with the CVS version
> anymore.

Looking to the ChangeLog (e.g. search for --size) may help, I'd even say 
this is what the ChangeLog is all about :)

2004-05-31  Hans Breuer  <hans breuer org>

        * app/app_procs.c : reduce the hack to pass --size to the
        export via user_data to the only filter supporting it. Other
        filters would crash on it or do worse ;(

it appears as if I should have tested my change - but failed that due to 
current lack of popt support on windoze. Anyway, with some other change 
done on HEAD the usual command line won't be enough, cause there are more 
than one filter capable to export to png. To explicit get the _one_ png 
filter supporting the --size hack (libart based) you need to select it 
explicit, probably with something along the line of :

dia --export=UML-demo.png --filter=png-libart --size=100x100 --nosplash 
UML-demo.dia

But looking at the code : sorry it won't as the --filter switch to select 
the exact filter isn't supported yet :)

So the only way for currnt HEAD would be to de-select all filter claiming 
to support png but you don't like to use ...

> It says:
>
> ** (dia-python:29008): WARNING **: --size parameter unsupported for 
> selected filter
>
> What's wrong?

I simply can't correlate all the message with the code. It appears as if 
there is a relation to the Python plug-in, which there probably isn't.
The rest of it simply says that the export filter seleced by extension is 
not the _one_ which supports the --size paramater, either :

- the gdk-pixbuf based filter which in fact needs a display, or
- the Cairo based filter, which should not need a display, but is only 
available if compiled --with-cairo

        Hans

-------- Hans "at" Breuer "dot" Org -----------
Tell me what you need, and I'll tell you how to
get along without it.                -- Dilbert