How to reproduce:
1. Use Window Switching layout Grid
2. Have one window which is significantly smaller than the screen it is placed on
3. Don't have further windows
4. Use Alt+Tab
The Thumbnail is upscaled significantly. This looks rather bad and makes the thumbnail all blurry
Thumbnail does not get scaled larger than actual size of window.
Git commit 8daf7e7ab7be22d489648fa14bf41b4bfe8f7a95 by Martin Gräßlin.
Committed on 09/07/2012 at 19:34.
Pushed by graesslin into branch 'KDE/4.9'.
Ensure that thumbnails do not get larger than the window
Upscaling windows looks really bad. If the thumbnail gets larger
than the window it's better to just use the orignal window size
and have the thumbnail rendered centered in the requested
M +3 -0 kwin/scene.cpp