On 27 June 2013 09:15, Alberto Mardegan <ma...@users.sourceforge.net> wrote:
> Hi all!
> I don't know when (or even "if") I'll start working on that, but I'm
> considering extending the gegl Qt bindings to include almost everything
> which is currently available to the C/glib bindings, so that a developer
> writing an application using gegl in Qt wouldn't have to use the C/glib
> API at all.
>
Hi Alberto,
which gegl Qt bindings are you referring to?
> One thing I'm concerned about is the lack of a gegl_node_setv()-like
> method, which would allow to set a list of properties on a node at once
> (I'm aware of gegl_node_set(), but that's unsuitable for language
> bindings).
> So the question is: is calling gegl_node_set_property() multiple times
> exactly equivalent to a single call to gegl_node_set() containing all
> the properties, or are there performance issues?
> I see that gegl_node_set_va() calls g_object_{freeze,thaw}_notify(),
> what is that needed for?
>
There is gegl_node_set_valist()
> Does setting a property have any immediate effect on the rendering, or
> does that happen only when gegl_node_process() is called?
> Could the order of setting properties have any effect on the rendering
> results or performance?
>
Setting properties on a node in a graph invalidates the graph.
Computing/rendering the invalidated regions is done as a separate step, and
it is the application code which controls this. So whether multiple
invalidation are coalesced or not depends on that code.
--
Jon Nordby - www.jonnor.com
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