[digikam] [Bug 281095] BQM AdjustCurve tool : curves adjustment doesn't work

[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=281095

--- Comment #18 from Gilles Caulier <[hidden email]> ---
Marcel,

Another point : If you test image editor tool (B&W and Adjust Curves), no
dysfunction are visible. Only BQM tools are broken. The reason about is that
BQM tools settings widget pass curves parameters to BQM action thread using a
QPolygon container for each color channel to apply (See CurvesContainer API).

Format of data osted in QPolygon depand of curves widget settings of course. In
BQM, it's always set as 16bits color depth, to be compatible with all image
type (we know the color depth of image only when queue is processed). Also,
FREE or SMOOTH mode depend of user choice done in GUI.

Action thread recieve QPolygon data and must convert curves settings to the
right format, compatible with image properties just loaded in BQM tool to be
processed. It's at this time that curves conversion are processed and failed.

Gilles

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