4 commits

Author	SHA1	Message	Date
James Grogan	7f5009fb5e	Initial fixed huffman coding for png.	2022-11-28 10:16:04 +00:00
James Grogan	e4f9393ee7	Non compressing png writer is ok.	2022-11-25 09:43:14 +00:00
James Grogan	8f97e9b7a1	Continue png writing.	2022-11-24 16:15:41 +00:00
James Grogan	9c8faa534b	Further compression and png work.	2022-11-23 15:41:33 +00:00