gdk_pixbuf_new_from_data... It works, but...

[Brian Clark <bc viz tamu edu>]

I have a window that displays an image, and the image gets updated from 
calculations I make.

Currently I'm doing this by setting up a data array (myBuffer), and 
creating a Pixbuf, which then gets assigned to the window.  When I 
change the image, I load the new data in the buffer, then call the 
gdk_pixbuf_new_from_data call again.

myPixbuf = gdk_pixbuf_new_from_data(myBuffer,GDK_COLORSPACE_RGB, FALSE, 
8, width, height, width*3, NULL, NULL);

It works, but Is this the best way to do it?  If I understand it right, 
I'm allocating memory each time I call this.  It seems like I'm going 
to get piles of discarded pixbufs clogging up my memory.  It's also got 
to be slower than just reusing the allocated memory.  But I can't find 
a call to just replace the data in a pixbuf with data from an array... 
something like a "gdk_pixbuf_replace_with_data" call.

I'm new to gtk, so maybe I'm looking at the wrong docs, or just don't 
know where to look.

Thanks,
Brian