Reference NVG_STENCIL_STROKES
Declared in Codebot.Render.NanoVG.pas on line 137
Flag indicating if strokes should be drawn using stencil buffer. The rendering will be a little slower, but path overlaps (i.e. self-intersecting or sharp turns) will be drawn just once
NVG_STENCIL_STROKES = 1 shl 1;