[Digikam-devel] Thumbnails

[Gilles Caulier]

2009/5/26 Andi Clemens <andi.clemens at gmx.net>:
> Gilles,
>
> I checked this right again:
>
> 1. I removed the .thumbnails folder
> 2. I open a folder in digiKam and let it generate the thumbs
> 3. I close digiKam
> 4. I start digiKam again
> 5. thumbs are read immediately
> 6. closing digiKam again
> 7. Open gwenview
> 8. display the folder I watched in digiKam before
> 9. thumbs are generated
> 10. close gwenview
> 11. open digiKam
> 12. THUMBS ARE RE-GENERATED!!

ok, but if i'm not too wrong digiKam only make large thumbs in
.thumbnails. Gwenview overight this files or normal size files ?

Gilles

>
> Somehow the thumbnails seems to get invalid after shown in gwenview.
> I can confirm this every time.
>
> Andi
>
> On Sunday 24 May 2009 21:48:15 Gilles Caulier wrote:
>> Andi,
>>
>> Duing some rules in digiKam thumbs generator, only Gwenview can use
>> digiKam thumbs, not the inverse.
>>
>> Gilles
>>
>> 2009/5/24 Andi Clemens <andi.clemens at gmx.net>:
>> > Hmm weird.
>> > I removed my .thumbnails folder.
>> >
>> > Then I did this:
>> >
>> > 1. open gwenview, go into some folder, generate thumbs
>> > 2. open digiKam, go into same folder, thumbs are regenerated
>> > 3. go into gwenview again, thumbs are regenerated!!!
>> > 4. close gwenview, open it again, thumbs are there
>> > 5. open digiKam, go into same folder, thumbs are regenerated
>> > 6. go into gwenview again, thumbs are regenerated!!!
>> >
>> > This is weird. Now both application steal each other their thumbs?
>> >
>> > :D
>> >
>> > This is a strange behaviour. Need to check if folder size is
>> > increasing...
>> >
>> > Andi
>> >
>> > On Sunday 24 May 2009 20:06:37 Andi Clemens wrote:
>> >> Ok will check this later. Right now I can see that all thumbs seem to be
>> >> generated again, maybe because of a different URI.
>> >> I will remove my .thumbnails folder this evening, display one folder in
>> >> gwenview and then in digiKam.
>> >> It should be quite fast in digiKam then...
>> >>
>> >> Andi
>> >>
>> >> On Sunday 24 May 2009 16:08:51 Gilles Caulier wrote:
>> >> > 2009/5/24 Gilles Caulier <caulier.gilles at gmail.com>:
>> >> > > 2009/5/24 Gilles Caulier <caulier.gilles at gmail.com>:
>> >> > >> 2009/5/24 Arnd Baecker <arnd.baecker at web.de>:
>> >> > >>> On Sat, 23 May 2009, Andi Clemens wrote:
>> >> > >>>> Hi,
>> >> > >>>>
>> >> > >>>> is it possible that our thumbnails are somehow not compatible
>> >> > >>>> with dolphin or gwenview?
>> >> > >>>
>> >> > >>> Maybe this entry
>> >> > >>>  https://bugs.kde.org/show_bug.cgi?id=152877
>> >> > >>> is of relevance here?
>> >> > >>> (Or is this one already solved in svn?)
>> >> > >>
>> >> > >> I think it's not fixed yet... and i think it's the Andi problem...
>> >> > >>
>> >> > >> I take a look to compare KDE thumb generator and digikam code...
>> >> > >>
>> >> > >> Gilles
>> >> > >
>> >> > > Arnd,
>> >> > >
>> >> > > Look code here :
>> >> > > http://lxr.kde.org/source/extragear/graphics/digikam/libs/threadimag
>> >> > >eio /t humbnailcreator.cpp#247
>> >> > >
>> >> > > uri is a QString. There is no latin conversion to record Uri in text
>> >> > > png chunk. so no problem from digiKam code here.
>> >> > >
>> >> > > BUT, ztxt png text chunk only support latin code from PNG library.
>> >> > >
>> >> > > http://www.libpng.org/pub/png/spec/iso/index-object.html#11tEXt
>> >> > >
>> >> > > ONLY itxt png text chunk oly support UTF-8 char encoding, and the
>> >> > > method to create itxt png chunk is disable until libpng 1.4.0...
>> >> > >
>> >> > > http://www.libpng.org/pub/png/spec/iso/index-object.html#11iTXt
>> >> > >
>> >> > > The question is : how Qt4::Qimage do to record QString in png text
>> >> > > chuck ?
>> >> >
>> >> > It sound like Qt record info as byte array into zTxt chunk. And it's
>> >> > work.
>> >> >
>> >> > Andi, my commit #972293 must fix your problem, at least between
>> >> > gwenview and digiKam. Uri is the same now.
>> >> > For dolphin, no idea. I can't find right code from
>> >> > kdebase::kio-thumbnail loader.
>> >> >
>> >> > Gilles Caulier
>> >> > _______________________________________________
>> >> > Digikam-devel mailing list
>> >> > Digikam-devel at kde.org
>> >> > https://mail.kde.org/mailman/listinfo/digikam-devel
>> >>
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