Bug 242033

Summary: Thumbnails on hover (desktop effect) renders a mirrored image
Product: [Unmaintained] plasma4 Reporter: jm.ouwerkerk
Component: widget-taskbarAssignee: Plasma Bugs List <plasma-bugs>
Status: RESOLVED UPSTREAM    
Severity: minor CC: notmart
Priority: NOR    
Version First Reported In: unspecified   
Target Milestone: ---   
Platform: Ubuntu   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description jm.ouwerkerk 2010-06-17 23:50:11 UTC 
Version:           unspecified (using Devel) 
OS:                Linux

When hovering over a window in the task bar, the thumbnail effect displays a mirrored image of the window.

Reproducible: Always

Steps to Reproduce:
Open an application which spawns a visible window, e.g. Konsole
Place the cursor at the window entry in the taskbar
Observe how a menubar in the application window, if present, renders on the bottom of the thumbnail, rather than the top -- and in general: how window content appears vertically mirrored in the preview.

Actual Results:  
You get vertically mirrored previews. Down is up, top is bottom etc.

Expected Results:  
I'd expect the window to preview “as-is”, preserving its vertical orientation in the thumbnail.

I suppose someone swapped a + or - somewhere in the rendering code, or coordinate system/conversion was changed and rendering code wasn't updated accordingly.
Comment 1 Marco Martin 2010-06-18 17:13:00 UTC 
can't be reproduced here
can you provide a screenshot, exact kde revision and info about the graphics drivers you're using?
Comment 2 jm.ouwerkerk 2010-06-18 17:26:46 UTC 
Sure: a screenshot of a mirrored konsole preview:

http://img824.imageshack.us/img824/6237/prop2.png

Notice how the blurry strip of colours in the bottom of the preview corresponds with the coloured xterm output at the top of the konsole window.

Using the radeon/ati drivers shipped with (the Ubuntu) Linux kernel 2.6.35-3
Using X-server 1.8.
Using Platform Version 4.4.85 (KDE 4.4.85 (KDE 4.5 Beta2))
Comment 3 Marco Martin 2010-06-24 18:26:36 UTC 
seems really a graphics driver issue, can't be reproduced on any machine here