extern "C" {
#endif
+int png_apply_filter_32(unsigned char*dest, unsigned char*src, int width, int y);
+void png_inverse_filter_32(int mode, unsigned char*src, unsigned char*old, unsigned char*dest, int width);
+
int getPNG(const char*sname, int*destwidth, int*destheight, unsigned char**destdata);
int getPNGdimensions(const char*sname, int*destwidth, int*destheight);