Just to add a bit to Sven's response:
"balachandran c" <balachandran_c@xxxxxxxxxxxxxx> writes:
> I am writing a plugin which requires comparing one row of pixels with
> the one following it. . . . how should it be done?
There are lots of examples in the GIMP source that you can look at.
Among the simplest is plug-ins/common/blur.c.
> One part of the algorithm involves quantizing the image, and the other
> involves user input. They are independent steps. Is it advisable to
> use one thread to launch the quantizing step, while the other waits
> for user input?
Usually what I do in a situation like this is to have the time-consuming
code at intervals execute a little chunk of code like this:
while (gtk_events_pending ())
gtk_main_iteration ();
This processes all Gtk+ events that have occurred since the last check,
and then returns control to the function.
Best,
-- Bill
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