png_read_png(png_ptr, info_ptr, PNG_TRANSFORM_PACKING|PNG_TRANSFORM_STRIP_16, NULL);
int bit_depth,color_type,interlace_type, compression_type,filter_method;
png_uint_32 width,height;
png_read_png(png_ptr, info_ptr, PNG_TRANSFORM_PACKING|PNG_TRANSFORM_STRIP_16, NULL);
int bit_depth,color_type,interlace_type, compression_type,filter_method;
png_uint_32 width,height;