int channel_bits, color_type, ilace_type, compression, filtering;
if(!(png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0))) {
int channel_bits, color_type, ilace_type, compression, filtering;
if(!(png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0))) {