typedef void (__cdecl typeof(png_set_tRNS))(struct png_struct_def *, struct png_info_def *, const unsigned char *, int, const struct png_color_16_struct *);
typedef void (__cdecl typeof(png_set_filter))(struct png_struct_def *, int, int);
typedef void *thandle_t_1;
typedef void (__cdecl typeof(png_set_tRNS))(struct png_struct_def *, struct png_info_def *, const unsigned char *, int, const struct png_color_16_struct *);
typedef void (__cdecl typeof(png_set_filter))(struct png_struct_def *, int, int);
typedef void *thandle_t_1;