A function of this type is responsible for freeing the pixel array
of a pixbuf. The Pixbuf.newFromData function lets you
pass in a pre-allocated pixel array so that a pixbuf can be
created from it; in this case you will need to pass in a function
of GdkPixbufDestroyNotify so that the pixel data can be freed
when the pixbuf is finalized.
A function of this type is responsible for freeing the pixel array of a pixbuf. The Pixbuf.newFromData function lets you pass in a pre-allocated pixel array so that a pixbuf can be created from it; in this case you will need to pass in a function of GdkPixbufDestroyNotify so that the pixel data can be freed when the pixbuf is finalized.