
extern int png_write_rgb24(const char* name, unsigned int w, unsigned int h, long inum, const unsigned char* buf);
extern int png_write_rgb32(const char* name, unsigned int w, unsigned int h, long inum, const unsigned char* buf);
extern int png_write_bgr24(const char* name, unsigned int w, unsigned int h, long inum, const unsigned char* buf);
extern int png_write_bgr32(const char* name, unsigned int w, unsigned int h, long inum, const unsigned char* buf);

