Bug 273351 - No previews for PGF files
Summary: No previews for PGF files
Status: RESOLVED DUPLICATE of bug 273366
Alias: None
Product: dolphin
Classification: Applications
Component: general (show other bugs)
Version: 16.12.2
Platform: openSUSE Linux
: NOR wishlist
Target Milestone: ---
Assignee: Peter Penz
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2011-05-15 16:11 UTC by S. Burmeister
Modified: 2011-06-27 12:01 UTC (History)
1 user (show)

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Description S. Burmeister 2011-05-15 16:11:34 UTC 
Version:           unspecified (using KDE 4.6.2) 
OS:                Linux

Dolphin as in KDE SC 4.6.3 does not show any previews for PGF images. Digikam2 beta handles them fine.

Reproducible: Always
Comment 1 S. Burmeister 2011-05-15 16:18:46 UTC 
Just to make sure. PGF is not a typo. This is about Progressive Graphics File.
Comment 2 Peter Penz 2011-05-15 19:44:34 UTC 
The creating of PGF files is out of scope of Dolphin itself, a general preview-plugin must be written for this. As we don't have a subsystem in bugs.kde.org for plugins it is fine to leave this open as wish for Dolphin. I just wanted to mention this because most probably reports like this will stay in the state NEW forever until any developer outside there will write such a plugin "by accident".
Comment 3 S. Burmeister 2011-05-15 21:33:17 UTC 
Is there no possibility to share the handling of image files, i.e. reading the preview from them, creating thumbnails etc.? It seems duplicating work if every application codes that functionality just for itself.
Comment 4 Peter Penz 2011-05-15 21:40:30 UTC 
> Is there no possibility to share the handling of image files,
> i.e. reading the preview from them, creating thumbnails etc.?

There is and it's the preview-plugins I mentioned above. I'm not sure why digikam2 uses a custom approach, probably they have good reasons for it.
Comment 5 S. Burmeister 2011-05-15 22:02:50 UTC 
Ok, I'll ask them and report back.
Comment 6 caulier.gilles 2011-06-27 11:57:12 UTC 
digiKam use PGF image to store thumb in a dedicated database. wavelets compression is used to optimize space (typically size can be reduced by 3 or 4 instead PNG way defined by open desktop)

Also, digiKam use DB thumb to support unconnected removable media. This is not possible with OpenDesktop std.

libPGF stil under developement and included into digiKam core. We patch it as well and report bug to PGF team.

Gilles Caulier
Comment 7 caulier.gilles 2011-06-27 12:01:05 UTC 
A simple PGF Qt image loader must be written in kimgio.

Gilles Caulier

*** This bug has been marked as a duplicate of bug 273366 ***
Comment 8 caulier.gilles 2011-06-27 12:01:19 UTC 
A simple PGF Qt image loader must be written in kimgio.

Gilles Caulier