On 8/27/07, Amit Kumar Saha <[EMAIL PROTECTED]> wrote:
> Hello all,
> On 8/27/07, Øyvind Kolås <[EMAIL PROTECTED]> wrote:
> > According to the plan GEGL will replace all code in the GIMP that is
> > accessing and or modifying pixels, some forms of GIMP plug-ins will
> > most likely be entirely replaced by GEGL plug-ins instead. And as
> > mentioned elsewhere in this thread, GEGL plug-ins can either be
> > descriptions of graphs, or actual C code. Another option that should
> > already be possible if someone is thus inclined, is actually to write
> > a GIMP plug-in for GIMP 2.4 that allows GEGL plug-ins to be used
> > directly by current versions of GIMP, this is less interesting than
> > another bridge that will have to be written, which is a wrapper for
> > (at least some of) the exisitng GIMP plug-ins to work from within
> > GEGL, this will be needed to provide legacy support for
> > some of the older plug-ins (these plug-ins will thus still work, but
> > have limitations wrt bit-depth and such).
> My current work at hand will possibly require me to write a plugin for
> GIMP (current version) which will use GEGL for its image processing
> operations. So if I proceed, I shall let the list know.
> Here a couple of more queries:
> 1. Does any of the developers here have some demo C code which takes
> in a XML file specification of the operations and performs the image
> processing tasks using GEGEL?

The gegl binary found in the gegl/bin/gegl.c does just this, it can
even be compiled without support for the GTK+ GUI which makes almost
all the logic of processing happen in gegl.c, please do note that the
format of the XML is not a finalized part of the interface to GEGL,
and that there are some parts that are not even implemented yet. (The
ability to specify a operation as a graph, stored as XML for instance,
right now such meta operations need to be written directly in C which
is a bit cumbersome for rapid prototyping.)

> 2. Can I assume safely that most of the image processing operations
> are "applying the same operation" to each pixel of the image?

I do not understand what you mean by this question. It might also be
an idea to take this discussion to the GEGL mailing list instead of
continuing it here.

/Øyvind K.
«The future is already here. It's just not very evenly distributed»
                                                 -- William Gibson
http://pippin.gimp.org/                            http://ffii.org/
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