[Bug 245957] New: Digikam shows pictures from PENTAX camera incorrectly in imageview

https://bugs.kde.org/show_bug.cgi?id=245957

           Summary: Digikam shows pictures from PENTAX camera incorrectly
                    in imageview
           Product: digikam
           Version: 1.3.0
          Platform: openSUSE RPMs
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: [hidden email]
        ReportedBy: [hidden email]


Version:           1.3.0 (using KDE 4.4.95)
OS:                Linux

All images from a PENTAX K10D camera are shown or loaded incorrectly. The image
looks like a strongly compressed preview picture with black bars at the top and
bottom which is loaded instead of the correct image. This is also the case in
Light Table view. The image is loaded and shown correctly in Gwenview and
Digikam's image editor.

Reproducible: Always

Steps to Reproduce:
Open the attached file in digikam and click on the thumbnail.

Actual Results:  
A low quality and low resolution image with black bars at the top and bottom is
shown when clicking on the thumbnail.

Expected Results:  
The correct high resolution image should be shown.

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--- Comment #1 from Sebastian L <samlabc yahoo de>  2010-07-27 23:48:30 ---
image file is too big for attachement (2.2 MB), you can download it here:
http://www.mal-was-anderes.de/_IGP7682.JPG

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[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=245957





--- Comment #2 from Gilles Caulier <caulier gilles gmail com>  2010-07-28 09:45:00 ---
Created an attachment (id=49570)
 --> (http://bugs.kde.org/attachment.cgi?id=49570)
digiKam 1.4.0 K10D preview

All work fine there, in preview mode and in editor. Nothing special. preview
mode show a reduced size version of image (libjpeg feature) to speed up time
loading. It's a option from digiKam setup dialog.

Gilles Caulier

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Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[hidden email]
          Component|general                     |Preview




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--- Comment #3 from Sebastian L <samlabc yahoo de>  2010-07-28 10:24:18 ---
Created an attachment (id=49572)
 --> (http://bugs.kde.org/attachment.cgi?id=49572)
digikam shows very small preview with black bars

In your screenshot the reduced size preview shows the image correctly. In my
digiKam 1.3 the preview image is show with black bars (see screenshot).
When enabling the option "Embedded preview loads full-sized images" in the
setup dialog, the image is shown correctly.
I think it would be good to have a possibility to change between full-sized and
reduced-size preview in the gui. Perhabs by clicking on the "Reduce Size
Preview" text.
Another alternative could be to show a hint to the setup dialog where the
preview mode can be changed when hovering over the "Reduce Size Preview" text.

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--- Comment #4 from Gilles Caulier <caulier gilles gmail com>  2010-07-28 10:27:31 ---
Sound like a libjpeg issue. Here i use 8.0 version.

Gilles Caulier

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--- Comment #5 from Sebastian L <samlabc yahoo de>  2010-07-28 10:33:17 ---
I'm using libjpeg8 8.0.1-1.9 from the opensuse 11.3 repositories

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--- Comment #6 from Marcel Wiesweg <marcel wiesweg gmx de>  2010-08-04 12:40:09 ---
I can reproduce this here. The 640x480 preview is shown, which has these
borders because the real image scales to 640x428.
Why is this preview shown? We require half the desktop size, let it be 1280:
  // require at least half preview size
  if (qMax(previews.width(), previews.height()) >= size / 2)
and 1280 / 2 = 640, so this hits.

I have a feeling that such a small preview usually has no good quality. Should
we require full desktop size? or 80%? Or let the condition as is, but require a
minimum of 1024px?

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Marcel Wiesweg <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |FIXED




--- Comment #7 from Marcel Wiesweg <marcel wiesweg gmx de>  2011-01-21 15:48:25 ---
I just tested with 2.0, and the problem is solved. A lot of code has been
changed in that area, so I assume it is fixed.

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Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Version Fixed In|                            |2.0.0

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