macos backend for gdk-pixbuf
Submitted by Allison (desrt)
I'm not sure of the specifics, but there must surely be some native functions for loading (and saving?) png/jpeg/tiff/etc. files on the Mac. When building on Mac OS, we should depend on those instead of having to use libpng/libjpeg/libtiff.
This would be similar in spirit to the gdi backend for win32.