[Digikam-devel] [Bug 224999] Thumbnails blury after upgrade to 1.0.0 from 0.10

[Vlado Plaga]

https://bugs.kde.org/show_bug.cgi?id=224999





--- Comment #28 from Vlado Plaga <rechner vlado-do de>  2010-04-01 18:04:43 ---
After a lot of testing I'm still not sure where exactly the problem comes from,
but it seems like there are both PPC specific as well as Ubuntu (or KDE 4.4)
specific causes involved. I remember the thumbnails' new PGF format had issues
with PPC hardware (big-endian) before, as was discovered in bug #210580.

My findings (from just looking at the surface):

- digiKam 1.2 on Ubuntu 10.04/ AMD64 (KDE 4.4.2) works very well. I tried both
the PPA version and a package compiled from the sources on my system.
Thumbnails look sharp, no matter whether they are displayed at 256 pixels or
slightly smaller.

- digiKam 1.2 on Ubuntu 10.04/ PPC (software versions should be identical to
the AMD64 version) automatically creates very blurry thumbnails, as can be seen
in my attachment from yesterday. But thumbnails look good when I set the slide
to 256 pixels and regenerate the thumbnails using the entry from the "extras"
menu! Still the thumbnails look blurry again when I reduce their size by just a
few pixels, or when I restart digiKam. After a restart, they remain blurry even
in 256 pixel size.

- digiKam 1.2 on Debian/ PPC (sid, with KDE 4.3.4) behaves differently again.
The thumbnails it generates are sharp, as long as they are displayed in 256
pixels width. If I slightly reduce their size, they look very blurry again.
Thumbnails generated under Debian can always be restored to look sharp by
changing their size to 256 - but thumbnails generated under Ubuntu always
remain blurry (also under Debian, where I used the same home account with just
a few pictures).

I'd like to see what is really stored in the "thumbnails-digikam.db", but I
don't know how to do that. My attempt with the "sqlite" command failed.

Should I open a new bug report for this issue? I could call it "Thumbnails
blurry on PPC (big-endian) platform".

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