Good luck, I once started to scratch the same itch to learn this file format, several years later I think I got about 30% of the way through!
More open source PDF code is good. If you can find a version of iText RUPS application from somewhere on the internet it's a useful tool for viewing the syntax / structure.
More open source PDF code is good. If you can find a version of iText RUPS application from somewhere on the internet it's a useful tool for viewing the syntax / structure.