Talk:Portable Network Graphics

How exactly does interlacing work?

Are scanlines created from the 8x8 map?

Wikipedia claims that the 7th layer encodes the entire image, but in my tests, that can't be true, so how does that work?

how do the levels combine together?

Edit:

I've since learned that the adam7 interlacing scheme works on 8x8 blocks repeated over the picture as much as nessicary.

so in a 24x8 image, you'd loop over the left most 8 pixels (0-7) for the first adam7 block, then loop over the second block from pixels 8-15, and the third would be 16-23