Dear The World-Wide Web Consortium Host
I am a programmer from China. I got your email from this article (https://www.w3.org/TR/2003/REC-PNG-20031110/#4Concepts.Registration). . I think that due to business needs, I want to decode a png image taken from a mac computer screen. But I found that its first IDAT block compression type is 8, which uses the default zlib compression algorithm. I also successfully used the zlib algorithm to decompress the data. But the actual compression type of the second IDAT block here is c. I learned from that link that the new compression algorithm needs to be registered on your side. I would like to ask what the corresponding algorithm of this compression type is. Can you provide a queryable table or link to query the compression algorithm used by different compression types. Thank you.
[cid:image001.png@01D74B62.FC0E1AE0]
Pjgao
