4 ms·
The check value is doubly stupid because there are two of them: zlib compression adds the Adler32 of the uncompressed data, and then the IDAT adds a CRC32 of th
by edflsafoiewq 4y ago
The check value is doubly stupid because there are two of them: zlib compression adds the Adler32 of the uncompressed data, and then the IDAT adds a CRC32 of the compressed data.
- layer8 4y agoNot all chunk types use compression. The CRC is a generic mechanism that is agnostic of the chunk type.