[Bug 275400] New: "Reduced Size Preview" images are blurry and not rotated after upgrade from 1.2.0

https://bugs.kde.org/show_bug.cgi?id=275400

           Summary: "Reduced Size Preview" images are blurry and not
                    rotated after upgrade from 1.2.0
           Product: digikam
           Version: 1.9.0
          Platform: Debian testing
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: Preview
        AssignedTo: [hidden email]
        ReportedBy: [hidden email]


Version:           1.9.0 (using KDE 4.6.3)
OS:                Linux

Hi,

digikam 1.9.0 recently entered Debian testing, replacing 1.2.0.
After the upgrade, most of the preview images are blurry and appear not
rotated.

If I tick "Embedded preview loads full-sized images", the full size preview
images are clear and correctly rotated. This only affects reduced size
previews. I don't think there are a problem with the images themselves because
version 1.2.0 was fine with the same image collection.


Reproducible: Always

Steps to Reproduce:
To reproduce:
- untick "Embedded preview loads full-sized images"
- click on a thumbnail

Actual Results:  
The images are:
- blurry
- not rotated

Expected Results:  
I was expecting the embedded preview to look nice and rotated, as it was with
version 1.2.0 and earlier.

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--- Comment #1 from Arnaud Guiton <arnaud-deb aerine net>  2011-06-11 15:20:07 ---
It's actually a bit worse: the problem is also visible with the slide show.

The images displayed in the slideshow are blurry and not rotated, even if
"Embedded preview loads full-sized images" is ticked.

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--- Comment #2 from Gilles Caulier <caulier gilles gmail com>  2011-06-20 16:13:30 ---
Blurry as what ? Can you take a screen-shot ?

Which image format you display exactly ? RAW or JPEG ?

Which shared libs you use with digiKam ? Go to Help/components Info for details

Gilles Caulier

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--- Comment #3 from Arnaud Guiton <arnaud-deb aerine net>  2011-06-20 21:14:53 ---
Hi Gilles,

> Blurry as what ? Can you take a screen-shot ?

I attach 3 screen-shots:
- full_size_preview_OK.png which shows an image as I expect it (rotated and
clear)
- reduced_size_preview_blurry.png which shows an image when "Embedded preview
loads full-sized images" is unticked
- slide_show_blurry.png which shows how the slideshow is whatever Embedded
preview loads full-sized images" is set to.

Note that even image that do not need to be rotated also appear blurry.


> Which image format you display exactly ? RAW or JPEG ?

The issue is only here for JPEGs. For RAW files, the "Embedded JPEG previews"
look fine and are correctly rotated.


> Which shared libs you use with digiKam ? Go to Help/components Info for details
------------------------------
digiKam version 1.9.0
Exiv2 can write to Jp2: Yes
Exiv2 can write to Jpeg: Yes
Exiv2 can write to Pgf: Yes
Exiv2 can write to Png: Yes
Exiv2 can write to Tiff: Yes
Exiv2 supports XMP metadata: Yes
LibCImg: 130
LibClapack: internal library
LibExiv2: 0.20
LibJPEG: 62
LibJasper: 1.900.1
LibKDE: 4.6.3 (4.6.3)
LibKExiv2: 1.2.0
LibKdcraw: 1.2.0
LibLCMS: 118
LibLensFun: external shared library
LibLqr: internal library
LibPGF: 6.09.44 - internal library
LibPNG: 1.2.44
LibQt: 4.7.3
LibRaw: 0.11.3
LibTIFF: LIBTIFF, Version 3.9.5 Copyright (c) 1988-1996 Sam Leffler Copyright
(c) 1991-1996 Silicon Graphics, Inc.
Marble widget: 0.11.2 (Stable Release)
Parallelized demosaicing: Yes
Database backend: QSQLITE
LibGphoto2: 2.4.11
LibKipi: 1.2.0
------------------------------

Cheers,

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Arnaud

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--- Comment #4 from Arnaud Guiton <arnaud-deb aerine net>  2011-06-20 21:16:22 ---
Created an attachment (id=61179)
 --> (http://bugs.kde.org/attachment.cgi?id=61179)
An image as I expect it (rotated and clear)

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--- Comment #5 from Arnaud Guiton <arnaud-deb aerine net>  2011-06-20 21:16:55 ---
Created an attachment (id=61180)
 --> (http://bugs.kde.org/attachment.cgi?id=61180)
An image when "Embedded preview loads full-sized images" is unticked: it's
blurry

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--- Comment #6 from Arnaud Guiton <arnaud-deb aerine net>  2011-06-20 21:17:30 ---
Created an attachment (id=61181)
 --> (http://bugs.kde.org/attachment.cgi?id=61181)
The slideshow is blurry, whatever Embedded preview loads full-sized images" is
set to

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--- Comment #7 from Gilles Caulier <caulier gilles gmail com>  2011-06-21 09:05:54 ---
Can you attach the JPEG image to this file to investigate on my computer ?

Gilles Caulier

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--- Comment #8 from Arnaud Guiton <arnaud-deb aerine net>  2011-06-21 21:30:14 ---
I'll send the JPEG to you directly: the attachment system complains the file is
too large.

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--- Comment #9 from Gilles Caulier <caulier gilles gmail com>  2011-06-22 08:46:05 ---
No problem here with digiKam 2.0.0 rc and libjpeg 8.0

In Album icon view image is properly displayed using reduced or full image
size, and rotated on the right way.

Note : Slideshow always use reduced preview to display image.

I suspect a problem with your libjpeg...

Gilles Caulier

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--- Comment #10 from Arnaud Guiton <arnaud-deb aerine net>  2011-06-22 09:15:23 ---
OK... The version of libjpeg currently in Debian Testing is 6b (6.2)
(http://packages.debian.org/wheezy/libjpeg62).

According to
https://projects.kde.org/projects/extragear/graphics/digikam/repository/revisions/master/entry/README
that's also the minimum requirement for digiKam, right? Gilles: do you confirm
that digiKam 1.9.0 should work with libjpeg 6.2?

Do you think I should discuss this with the maintainer of libjpeg in Debian? Is
there anything else I could do to confirm the problem comes from the library?

Cheers,

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--- Comment #11 from Gilles Caulier <caulier gilles gmail com>  2011-06-22 09:25:03 ---
yes, i confirm that libjpeg 6.2 must work as well. I used it a lots in the
past.

I'm not sure if it's a real problem with your libjpeg or digiKam 1.9.0, but i'm
sure that libjpeg provide a reduced size JPEG image decoded as well.

I will try to open your image in digiKam 1.9.0 to see if problem still
reproducible on my computer with libjpeg 8.0. If it is, problem is located in
digiKam and it's fixed with 2.0.0, else, it's you libjpeg 6.2...

Gilles Caulier

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--- Comment #12 from Gilles Caulier <caulier gilles gmail com>  2011-06-22 11:58:12 ---
Definitivly, there is no difference between

- 1.9.0 :
http://www.flickr.com/photos/digikam/5859749666/sizes/o/in/photostream/

- 2.0.0 :
http://www.flickr.com/photos/digikam/5859196519/sizes/o/in/photostream/

So, problem is on your computer...

Gilles Caulier

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--- Comment #13 from Gilles Caulier <caulier gilles gmail com>  2011-12-16 11:15:36 ---
Arnaud,

This file still valid using digiKam 2.4 ?

Gilles Caulier

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--- Comment #14 from Arnaud Guiton <arnaud-deb aerine net>  2011-12-16 12:02:35 ---
Hi Gilles,

I'm only using Debian-generated binaries on this machine and the  
Debian package is still using digikam 1.9.0 (in the testing and  
unstable repositories). There is a 2.3.0 digikam built but only in the  
experimental repository, which I'm a bit reluctant to use.

I really hope the problem has disappeared in 2.3 or 2.4 but I've no  
way of testing this on my machine now. I'll update this bug report  
when I have a chance to get a newer digikam package.

Cheers,

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             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |FIXED

--- Comment #15 from Arnaud Guiton <[hidden email]> ---
Hi,

new versions of libjpeg and digikam entered Debian Testing and after upgrading:
- libjpeg to 8d-1;
- digikam to 2.6.0-1;
I don't see the issue I initially described.

=> This bug, whatever the cause was, can probably be marked as fixed.


Cheers,

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           What    |Removed                     |Added
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   Version Fixed In|                            |2.7.

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