PK_blend_ov_smooth_t    


typedef int PK_blend_ov_smooth_t;


This data type is used to indicate how to deal with smooth overflow.
It has three values:

    PK_blend_ov_smooth_no_c            prevent smooth overflow
    PK_blend_ov_smooth_diff_c          enable smooth overflow for different
                                       convexity
    PK_blend_ov_smooth_any_c           enable smooth overflow for any
                                       convexity