How a path's subpaths combine into a filled region (ยง51 "Fill rules").
nonzero: a point is inside when the signed number of times the path winds
around it is not zero. Two nested rings drawn the same way therefore fill
solid; the inner one only cuts a hole if it winds the other way.
even-odd: a point is inside when a ray from it crosses the path an odd
number of times. Nesting alternates filled and empty regardless of winding.
How a path's subpaths combine into a filled region (ยง51 "Fill rules").
nonzero: a point is inside when the signed number of times the path winds around it is not zero. Two nested rings drawn the same way therefore fill solid; the inner one only cuts a hole if it winds the other way.even-odd: a point is inside when a ray from it crosses the path an odd number of times. Nesting alternates filled and empty regardless of winding.nonzerois the default, matching SVG and Canvas.