PNG_LIBPNG_VER_STRING 2956 extra_lib/include/png/png.h     PNG_LIBPNG_VER_STRING,  png_sizeof(png_struct));
PNG_LIBPNG_VER_STRING 2974 extra_lib/include/png/png.h     PNG_LIBPNG_VER_STRING, png_sizeof(png_struct));
PNG_LIBPNG_VER_STRING  443 src/media_tools/img.c 	png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, (png_voidp) &udta, NULL, NULL);
PNG_LIBPNG_VER_STRING  571 src/media_tools/img.c 	png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);