Declaration
procedure DrawPolygon(Alpha: integer; SelPoly: PPointArray; SelPolyCount: integer);
procedure DrawPolygon(Alpha: integer; Alphas: PInteger; SelPoly: PPointArray; SelPolyCount: integer);
Description
Draw specified polygon in the mask, using Alpha value for all pixels. Valid range 0 (fully transparent) to 255 (fully opaque).