Raylib_rlgl.BlendFactorval zero : tval one : tval src_color : tval one_minus_src_color : tval src_alpha : tval one_minus_src_alpha : tval dst_alpha : tval one_minus_dst_alpha : tval dst_color : tval one_minus_dst_color : tval src_alpha_saturate : tval constant_color : tval one_minus_constant_color : tval constant_alpha : tval one_minus_constant_alpha : t