https://bugs.documentfoundation.org/show_bug.cgi?id=144981
--- Comment #6 from Jan-Marek Glogowski <glo...@fbihome.de> ---
This looks like a bug in the headless VCL plugin code. Removing the
cairo_matrix_t aMatrix;
cairo_matrix_init_translate(&aMatrix, 0.5, 0.5);
cairo_set_matrix(cr, &aMatrix);
block from SvpGraphicsBackend::drawPolyPolygon fixes this artifact, but results
in other drawing glitches, because the sub-pixel positioning then is a bit off
(half a pixel). Or I'm missing something else or maybe it's a Cairo bug.
It doesn't show up in gtk3, which also uses Cairo / this code, because gtk3 -
via weld - uses a native widget instead of LO's widget (some GtkNotebook). The
QPainter Qt5 code is also correct.
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