I think it makes perfect sense for this to be windows-only, and it wouldn't make sense to make it cross-platform. Make a PDF library cross platform? Perfect se

I think it makes perfect sense for this to be windows-only, and it wouldn't make sense to make it cross-platform. Make a PDF library cross platform? Perfect sense. Make a PDF reader cross platform? You'll end up with a mess. The reader itself is mostly the UI an interacts with the OS's API for rendering and drawing. There's really no way to write one that works on different OSs unless you either have three separate codebases. Or you can hide three separate codebases under some abstraction that makes the application look alien on all supported platforms.