AOO410/main/basegfx/inc/basegfx/polygon/b2dpolypolygonfillrule.hxx

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#ifndef _BGFX_POLYGON_B2DPOLYPOLYGONFILLRULE_HXX
#define _BGFX_POLYGON_B2DPOLYPOLYGONFILLRULE_HXX

#include <sal/types.h>

//////////////////////////////////////////////////////////////////////////////

namespace basegfx
{
    /** Fill rule to use for poly-polygon filling.

    	The fill rule determines which areas are inside, and which are
    	outside the poly-polygon.
     */
    enum FillRule
    {
		/** Areas, for which a scanline has crossed an odd number of
            vertices, are regarded 'inside', the remainder 'outside'
            of the poly-polygon.
         */
        FillRule_EVEN_ODD,

        /** For each edge a scanline crosses, a current winding number
            is updated. Downward edges count +1, upward edges count
            -1. If the total accumulated winding number for one area
            is not zero, this area is regarded 'inside', otherwise,
            'outside'.
         */
        FillRule_NONZERO_WINDING_NUMBER
    };
}

#endif /* _BGFX_POLYGON_B2DPOLYPOLYGONFILLRULE_HXX */