Created attachment 106795 [details] quick hack The problem is that the clip contains multiple self-intersecting paths, in that case _cairo_clip_combine_with_surface (src/cairo-clip-surface.c:78) uses each path separately with a fill (OPERATOR_IN), for each pixel on the contour of more than one path that results in a different pixel coverage than filling once with the path intersection of all paths. In get_clip_surface (src/cairo-xcb-surface-render.c:1698) using a temoporary clear image surface and painting in white (OPERATOR_ADD) to perform the clip fixes clip-polygons.xcb-render-0_0.argb32 clip-group-shapes-circles.xcb-render-0_0 .argb32 and .rgb24
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