[Digikam-devel] [Bug 152192] resize really bad qualitatively

[Arnd Baecker]

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http://bugs.kde.org/show_bug.cgi?id=152192         
arnd.baecker web de changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|general                     |Image Editor



------- Additional Comments From arnd.baecker web de  2007-11-12 09:19 -------
Hi Christian,

I assume that you use the Image editor, "Transform/resize"?

This is the same issue we discussed a couple of days on the IRC.
Only if "Restore photograph" is ticked, cimg is used.
Otherwise  DImg::smoothScale() is used to resize image, http://websvn.kde.org/branches/extragear/kde3/graphics/digikam/libs/dimg/dimgscale.cpp?revision=675631&view=markup
(the code comes frome imlib2 + 16 bits color depth support).

User cryos (in the IRC) wrote that "It used to perform a lot better",
but nothing has changed  in the underlying code for ages.
Therefore Gilles suspected:
"perhaps it is a compilation option (optimization ?) used to compile digiKam which breaks something"

This sounds like it needs a thorough investigation...