Re: Saving the map as image

[Patrick Salecker <patty9999 gmx de>]

Am 11.01.2011 00:02, schrieb Jiří Techet:
> On Thu, Jan 6, 2011 at 21:04, Patrick Salecker<patty9999 gmx de>  wrote:
> > Hi everyone,
> >
> > I want to save the visible part of the map as an image, what is the best way
> > to do it?
> > I tried it by using gtk.widget.get_snapshot, but then the area of the map is
> > blank.
> I haven't tried it myself but something like this might work:
>
> 1. get ChamplainView from the GtkChamplainEmbed widget by
> gtk_champlain_embed_get_view()
> 2. As ChamplainView is a ClutterActor, you can create a texture from
> it by  clutter_texture_new_from_actor()
> 3. Get the CoglTexture from ClutterTexture by clutter_texture_get_cogl_texture()
> 4. Get the image data by cogl_texture_get_data()
> 5. Use GdkPixbufLoader to load the data and save it with gdk_pixbuf_save()
>
> I'm not sure at all this will work and I'm not sure this is the
> easiest way either. If someone knows a better way, please let us know.
Thanks for your idea.

It fails at 3., the ClutterTexture created with 
clutter_texture_new_from_actor() has no CoglTexture, so get_cogl_texture 
and get_property("cogl-texture") return None (in Python).