Gwenview-KDE4 displays transparency as black color

[Arthur Schiwon]

I detected this behavior when i worked on a photo with GIMP, added an alpha channel and cut off edges. I wanted to look at the product (PNG format) with Gwenview-KDE4 2.1 (KDE Version 4.08). Instead of the expected transparent corners, they are displayed black. The preview provided by Dolphin was correct in spite of that and so was it opened with Firefox 3.

After that i made a test image from scratch, that is a blank, transparent Canvas with a green square drawn on it (with GIMP again). I saved it as PNG as well as GIF and the results were the same: Transparency was turned into black with Gwenview, but it is displayed correctly in Dolphin Preview and Firefox.

I attach the latest test picture.

[Jonathan Thomas (echidnaman)]

Confirming. Will send an upstream report if one hasn't been filed already.

[Jonathan Thomas (echidnaman)]

Version: 2.1 (using 4.00.80 (KDE 4.0.80 >= (KDE 4.1 Beta1), Kubuntu packages)
Compiler: gcc
OS: Linux (i686) release 2.6.24-17-generic

Gwenview is displaying transparency in pictures as black. The following test png of a green square on a transparent background displays correctly in Dolphin's preview and in Firefox, but not in Gwenview.

Transparency in this case was set in Gwenview to display as a checkerboard.

[Jonathan Thomas (echidnaman)]

Created attachment 25404
Test png

[Aurélien Gâteau (agateau)]

This is fixed in SVN.

[Jonathan Thomas (echidnaman)]

Once intrepid gets KDE 4.1 beta2 kdegraphics packaged, this will be fixed.

[Jonathan Thomas (echidnaman)]

Oh, kdegraphics for beta2 was already released in intrepid...