it…out

I haven’t programmed any OpenGL since college, but this blog post which I stumbled across from planet GNOME caught my eye.  It’s a (relatively) simple C program that makes use of GLSL to perform some fun image transforms a la Apple’s Photobooth software.  GLSL (or any other shader language) didn’t exist when I studied OpenGL, so this code was very educational to look through.  After trying to run it, I discovered that I needed to use a 512x512 jpg image for this to work.  Other sizes or B&W images didn’t work.  The code built without any problem after installing glut/glu/glew and freeimage.  Hopefully I’ll have time to mess around with this some more.  Anyway, here are the results.
 

And the original: