Hi, Julien BLACHE wrote: > stef <stef.dev at free.fr> wrote: > > Hi, > > >> frontends will have to be changed to benefit from the improvements in >> the new SANE >> version. These changes are small, and the sane-frontends package give a >> sample >> implementation. Frontend developers will find help here if they need. >> > > The problem is binary-level backward compatibility, not source-level > backward compatibility. > > The issue is that upgrading SANE should not break frontends > silently. I'm pretty sure the sane_start() change will break not only > multi-page scans but also automated scripts. > > There's also the possibility to use a 1.1 backend with a 1.0 > libsane, aka using a 1.1 backend with a 1.0 libsane-dll. That's > another variation on that same theme. > The light status will not break a frontend, just make it respond quickly with an condition. Actually I find a pop-up dialog in a UI program telling me "light warming up" more useful than a program that hangs for 30 seconds and does not even refresh the UI in this period of time. The user can then still make further changes to e.g. the scan settings and just re-click scan later. And a spinning progress indicator really is not too much of a deal for further improvement.
Binary incompatible and breaking would be silently data corruption or no longer starting due to missing symbols etc. I strongly vote to have the light status in SANE 1.1. -- Ren? Rebe - ExactCODE GmbH - Europe, Germany, Berlin Managing Directors: Susanne Klaus, Ren? Rebe Location: Berlin, Amtsgericht Charlottenburg HRB 105 123 B Tax-ID#: DE251602478 http://exactcode.de | http://t2-project.org | http://rene.rebe.name
