[Digikam-devel] [digikam] [Bug 339801] Thumbnails are not displayed properly on 10-bit/channel monitors

[Marcel Wiesweg]

https://bugs.kde.org/show_bug.cgi?id=339801

--- Comment #9 from Marcel Wiesweg <marcel.wiesweg at gmx.de> ---
The main difference that I see between the code paths is that the DImg-derived
drawing is done by conversion DImg -> QImage -> QPixmap
(GraphicsDImgItem::paint) and later drawing of this pixmap via a painter 
while the thumbnail pixmap is created by drawing a QImage on a QPixmap which is
created empty 
(ThumbnailLoadThread::slotThumbnailLoaded), later this pixmap is drawn via a
painter
(ItemViewImageDelegate::drawThumbnail) 

You could try to edit line 742 of thumbnailloadthread.cpp so that the
highlighting is not done to rule out that this step (drawing on empty pixmap)
is the problem

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