[Digikam-devel] [Bug 286127] Resize tool in digikam corrupt transparencies on png files

[Gilles Caulier]

https://bugs.kde.org/show_bug.cgi?id=286127





--- Comment #5 from Gilles Caulier <caulier gilles gmail com>  2011-11-09 10:07:08 ---
ok, I found the problem :

In preview mode we don't display the full image, but preview JPEG embedded in
IPTC metadata. There is no Alpha channel in this image.

To render thumbnails, we use also the preview image from IPTC.

To solve this issue, we must use a format which store alpha channel. To continu
to use JPEG compression, JNG can be a solution, or PGF which use wavelets
compression.

Gilles Caulier

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