Comment # 41 on bug 69341 from darkbasic

"Speed up glamor_copy_area for certain use cases"
(https://bugs.freedesktop.org/attachment.cgi?id=91380) from bug #71813
(https://bugs.freedesktop.org/show_bug.cgi?id=71813) seems to fix my KDE raster
backend issue! hurray!!!

I suggest you to apply also "polylines: Handle diagonal lines"
(https://bugs.freedesktop.org/attachment.cgi?id=91802) which fixes the gtk
primitives/Calc issues (bug #68524
https://bugs.freedesktop.org/show_bug.cgi?id=68524)