Some standard C code to play around with bitmaps, I'm just doing this for fun and to learn a bit OpenCL.
Currently it supports only reading JPG and PNG files, and saving JPG, PNG and TGA. Maybe I'll add support for other formats later.
All the filtering operations are done in RGBA colorspace, however saving can be done in simple RGB
It works on OS X and should work fine on Linux but I didn't try.
You will need libpng, libjpeg and OpenCL, then execute the script corresponding to your OS.
Run build-osx.sh
Run build-linux.sh
WTFPL, see the COPYING file.