I've been working on using Pyrex for a GIMP plug-in. It works now. If that sounds interesting to you, there's a link to the code at http://gimp-plug-ins.sourceforge.net/refract/ The parts implemented in Pyrex are a PixelFetcher, functions for calculating displacement and interpolation, and the main processing loop iterating over a row buffer. The speed is comparable to the C version (within 5% on my 256x256 test image). I haven't tried a pure Python or a Python+psyco implementation yet. I'm not sure yet how to distribute the pyrex definitions for libgimp. Since I only have one program using it so far, I'm distributing it all in one tarball and linking "pyxgimp.pxd" into the source directory. There are some sloppy bits where I convert between pygimp classes (the libgimp Python bindings included with GIMP) and my pyrex ones. Eventually, I should pick a set of bindings and stick with them, but there's much of pygimp's functionality I haven't duplicated yet. The things in libgimp I wrapped with pyrex are Drawable, Tile, and PixelRegion -- the structures I needed to access in my pixel processing loop. -- The moon is last quarter, 63.3% illuminated, 20.9 days old.
