On Fri, Apr 26, 2013 at 11:50 PM, Bill Allombert <bill.allomb...@math.u-bordeaux1.fr> wrote: > On Wed, Apr 24, 2013 at 10:10:42PM +0800, Aron Xu wrote: >> On Wed, Apr 24, 2013 at 9:19 PM, Bill Allombert >> <bill.allomb...@math.u-bordeaux1.fr> wrote: >> > >> > As IJG libjpeg maintainer, my plan is to move to libjpeg9 which has more >> > feature. >> > >> >> From a user's prospective, I don't think adding bunches of not widely >> used features is that useful (I mean it's useful but not that >> important), but speed does matter a lot, especially on slower hardware >> like ARM-boards. > > I think there are some misunderstanding about what offer libjpeg8: > > 1) by default, libjpeg8 creates JFIF files which are compatible with > libjpeg62. > > 2) by default, libjpeg8 uses a different subsampling which lead to higher > quality output than libjpeg62. > > However this leads to files which are not byte per byte indentical to what > libjpeg62 would produce, but this is in no way required by the JPEG standard. > Indeed the standard explicitely allow for different DCT implementation.
No this is not the case. It was just this initial issue which raise my attention to what is happening with libjpeg in Debian. > 3) libjpeg8 implements a larger part of the JPEG standard, so it can read and > write > JFIF files that are standard compliant but not supported by libjpeg62. This is too much generic. Could you please list those differences in the JPEG standard implementation between IJG libjpeg and libjpeg-turbo. > 4) it also provides a number of extension to the standard, which are well > documented. Again, could you please list that? If you are speaking about SmartScale, then I really don't think that non-(ISO)-standard extensions are usefull for anything. Or is there anything else? > So I do not think it is fair to restrict JPEG support in Debian to 1998 image > processing technology. Nobody is saying that. Bill, please stop being holed up in your position. Most of the Open Source world (as already proven and cited) has moved to libjpeg-turbo and I don't think this is the case where Debian should stand out. O. P.S.: You still haven't answered my questions in the previous email. I don't think they are unreasonable. -- Ondřej Surý <ond...@sury.org> -- To UNSUBSCRIBE, email to debian-devel-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/CALjhHG92k=s4vbzjnlr2vskkwuae+vfpovhmh8wgkzr69qh...@mail.gmail.com
