https://bugs.kde.org/show_bug.cgi?id=427658

Ahab Greybeard <ahab.greybe...@hotmail.co.uk> changed:

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--- Comment #1 from Ahab Greybeard <ahab.greybe...@hotmail.co.uk> ---
Created attachment 132352
  --> https://bugs.kde.org/attachment.cgi?id=132352&action=edit
Artifacts with polygonal selection tool

I can confirm this for the 4.4.0 appimage and also for the 4.3.0 appimage.

The artifacts happen if canvas graphics acceleration is turned off.
When the polygonal selection is completed, the artifacts go away.
If any other window becomes active, the artifacts go away.

The artifacts seem to be drawn fragments of the assistant preview lines and
they are 'swept away' by the polygonal selection construction line.

When the selection is completed then the artifacts go away.

With the Outline(freehand) selection tool, there are artifacts but they are
concentrated at the point of drawing the selection.

With the rectangular and elliptical selection tool, there are short lived
temporary artifacts due to break up of the assistant preview lines but the
preview lines seem to be continuously refreshed.

When the selection is completed and drawn, the artifacts go away.

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