Hope you feel refreshed in the morning. The core idea is that a PNG file contains an 8-byte signature followed by any number of chunks. The outside of every ch

Hope you feel refreshed in the morning. The core idea is that a PNG file contains an 8-byte signature followed by any number of chunks. The outside of every chunk has a regular layout: https://www.w3.org/TR/2003/REC-PNG-20031110/#5Chunk-layout https://www.w3.org/TR/2003/REC-PNG-20031110/#5Chunk-layout . But the inside of each type of chunk is different. There are many types of chunks, like: https://www.w3.org/TR/2003/REC-PNG-20031110/#5ChunkOrdering https://www.w3.org/TR/2003/REC-PNG-20031110/#5ChunkOrdering