Revision history for Perl extension Acme::Steganography::Image::Png. 0.01 Fri Mar 11 22:01:05 2005 - original version; created by h2xs 1.19 0.02 Sat Mar 12 13:33:13 GMT 2005 - Added RGB classes. 0.03 Mon Mar 14 21:19:05 GMT 2005 - Use string & and | operators for about 30% speedup Ops are bad, m'kay. 0.04 Mon Mar 14 22:59:27 GMT 2005 - Acme::Steganography::Image::Png::556FS uses Floyd-Steinberg dithering to spread around the errors caused by stuffing way too much data in. 0.05 Mon Apr 3 15:20:09 BST 2006 - Actually give the error message on file open failure - Patch from Simon Wistow to allow write_images to use an existing Imager object, which allowed support for inlining images within files. 0.06 Mon Oct 2 00:33:16 BST 2006 - Wrap the arguments to calls to croak in (), to avoid problems with croak being misinterpreted as a method to call on an object.