PANDA INTERNAL. This call implements a dummy flush proceedure for libpng. This is needed so that Panda can get at the compressed PNG data, whilst converting it on the fly from unsupported PNG variants, and while not having to deal with temporary files. PDF documents only need the content of the IDAT chunks within the PNG file, and this method eases gaining access to those chunks.
Panda is under development by Michael Still (mikal@stillhq.com). All code is Copyright Michael Still 2000 - 2003, and is released under the GNU GPL. Code submissions are welcomed. Contact Michael at the address above if you have something you would like to contribute.