[Digikam-devel] [Bug 267361] New: When using the luminosity curve in the image editor on an initial import from NEF, all changes are irreversible and cumulative.

[mjjohnson.geo at yahoo.com]

https://bugs.kde.org/show_bug.cgi?id=267361

           Summary: When using the luminosity curve in the image editor on
                    an initial import from NEF, all changes are
                    irreversible and cumulative.
           Product: digikam
           Version: 1.8.0
          Platform: Archlinux Packages
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: Image Editor
        AssignedTo: digikam-devel at kde.org
        ReportedBy: mjjohnson.geo at yahoo.com


Version:           1.8.0 (using KDE 4.6.0) 
OS:                Linux

When I single-click on a RAW file (NEF format) in digiKam and it opens up in
the image editor, I have a problem while changing the luminosity curve. Namely,
if I make an adjustment, and then move the curve back to its starting position
(either manually or by hitting reset), the change persists: it doesn't get
undone/reversed in the preview. If I then tweak the curve again, the new
changes get added onto the new changes. (This isn't just the preview, either:
the resulting image after I hit "import" also shows the cumulative
adjustments.) The only way to get back to the original state that I've found is
to close the image editor and start over. As a result, the luminosity curve
feature is completely unusable. This is new to 1.8.0; the luminosity curve
worked as expected in 1.7.0.

Reproducible: Always

Steps to Reproduce:
Open Digikam 1.8.0. Go to an album and single-click on a NEF image to open it
in the image editor. Make a noticeable change to the luminosity curve (in the
"post processing" tab). Notice how the preview changes. Now change the curve
back, and notice that the preview doesn't get reverted. Make the change again,
and notice how it adds to the previous change, rather than being made afresh.
(Repeat the last several steps as desired to see the effect building up.)

Actual Results:  
I had an image with hugely exaggerated curve adjustments.

Expected Results:  
It should have only performed the adjustments matching the curve shown in the
luminosity curve window, instead of adding all the adjustments I ever did (and
had later undone/modified).

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