[Bug 292813] New: Gwenview - JPEG rotation not lossless any more

[Georg Hennig]

https://bugs.kde.org/show_bug.cgi?id=292813

           Summary: Gwenview - JPEG rotation not lossless any more
           Product: kde
           Version: unspecified
          Platform: Compiled Sources
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: major
          Priority: NOR
         Component: general
        AssignedTo: unassigned-bugs at kde.org
        ReportedBy: georg298 at gmx.de


Version:           unspecified (using KDE 4.8.0) 
OS:                Linux

In Gwenview, rotation of JPEG images used to be lossless.
This is not the case any more in KDE 4.8.0, e.g. the rotated JPEG images are
recompressed, resulting in a) very slow save speed and b) in recompression
artefacts.


Reproducible: Always

Steps to Reproduce:
1) Open a jpeg image in gwenview
2) rotate it
3) save it

Actual Results:  
Saving is very slow, the saved image differs from the original image (lossless
rotation).

Expected Results:  
All images with pixel count modulo 8 = 0 should be rotated losslessly as it was
in gwenview during the last years.

This is a major bug as it produces data loss. People cannot rely on gwenview
any more. I won't use it any more until this bug is fixed.

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