Meh android top-posting. Png is totally lossless. It analyzes each scanline versus the prior, and recodes. Thus a top to bottom gradient becomes a field of identical repeating numbers using the SUB filter, which compresses extremely well. There are several filters; png has many operating modes. <blockquote type="cite">On May 21, 2010 3:06 PM, "Phillip Susi" <<a href="mailto:psusi@cfl.rr.com">psusi@cfl.rr.com</a>> wrote: On 5/21/2010 1:40 PM, Louis Simard wrote: > Err... While I know what you want me to do (you want > C...Heh, yea, I've struggled with this on thunderbird too, which is why I usually end up submitting patches via something like mime-construct or some other command line mime editor where I can force it to use Content-Disposition: inline. > - For PNG: the data used to store some images on the CD is not > compressed to the highest level....I believe that PNG applies a lossey compression first, then gzips the result. It sounds like you are saying that the gzip is done with -3 instead of -9, so you ungzip it and recompress on -9. Is that more or less correct? If so that sounds pretty good, but like you mentioned before, should be done upstream rather than only for the livecd. > - For SVG: the data used to store ALL images on the CD is not optimal > for rendering purposes. I...Sounds good, and also would be good to do upstream instead of just for the lived. > - For XML, as described by Martin Owens: xmllint would remove > everything superfluous from all f...I noticed the bloated gconf xml files a few years back myself and brought it up on the devel list. IIRC I saw even more wasted space than you mention here, due to 10, 20, even 30 characters of whitespace indenting each line. This does add a lot of bloat to the files I don't like to have on an installed system, but once compressed into the squashfs for the livecd, the whitespace drops out, so there wasn't much concern about it. At one point I tried just converting the whitespace into hard tabs and saved quite a bit of space, while preserving the indentation for human editing. -- Ubuntu-devel-discuss mailing list <a href="mailto:Ubuntu-devel-discuss@lists.ubuntu.com">Ubuntu-devel-discuss@lists.ubuntu.com</a> Modify settings or unsu...</blockquote>