int png_apply_filter_32(unsigned char*dest, unsigned char*src, unsigned width, int y);
void png_inverse_filter_32(int mode, unsigned char*src, unsigned char*old, unsigned char*dest, unsigned width);
int png_apply_filter_32(unsigned char*dest, unsigned char*src, unsigned width, int y);
void png_inverse_filter_32(int mode, unsigned char*src, unsigned char*old, unsigned char*dest, unsigned width);