On Sat, Aug 03, 2013 at 12:48:24AM +0000, Alan Curry wrote: > Package: libjpeg-progs > Version: 8d-1 > Severity: normal > Tags: patch upstream > > This report will mostly be a duplicate of #74087, closed almost 13 years > ago, without any explanation that I can find in the bug log, and without > actually fixing it as far as I can tell from the packages from that era > on archive.debian.org. > > The problem now is as it was then: djpeg can't handle all jpegs. The > ones it doesn't handle are the ones encoded as YCCK or CMYK. The bug log > for #74087 doesn't mention YCCK or CMYK, so it's possible that the > problem just wasn't understood back then. But the sample included in the > original bug report is a YCCK jpeg.
Yes this is my fault. I closed it because it was not Debian specific in anyway, so I assumed the JPEG image was invalid. > This time, there's a patch. The patch has been seen before too, in a > slightly different form, targeted at libjpeg-turbo. It adds a couple of > conversion functions to the library, allowing clients like djpeg to get > RGB output regardless of the input. > > http://sourceforge.net/p/libjpeg-turbo/patches/15/ > > It was rejected there, but I hope history won't repeat itself here. > It makes no sense that djpeg (the Decode JPEG program from the de facto > JPEG reference implementation!) can't decode all jpegs. The people in > the libjpeg-turbo discussion didn't even seem to realize they were > deciding to keep their version of djpeg crippled forever. > > The conversion code could be moved into djpeg, leaving the library > untouched, but djpeg isn't the only place something like this is needed. > I'd also like to see xli not choke on these jpegs. > > If the conversion is supported by the library, then adding YCCK-jpeg > support to djpeg and xli is a 3-line patch for each program. > > If the conversion function is banned from the library like the > libjpeg-turbo people seem to want, xli and djpeg both need the same big > mess of pixel-shuffling code inserted into them, and so will the next > program. That's just a stupid way to do it. Dear Alan, I have forwarded your bug report to the upstream maintainer. Thanks for taking the time to work on this. However, I have a question: how do you generate such JPEG images ? Would there be benefit for libjpeg to be able to do that ? Cheers, -- Bill. <ballo...@debian.org> Imagine a large red swirl here. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
