A technical question/ maybe a feature request

[mnk]

If it turn to be a feature request it's probably one asked often, but as I'm trying to learn something, it's the technical part that'd be more important.
So, the question is what parts of the code should I be looking at if I was trying to add a tile viewer (in linux) ? I don't know enough about assembler to write any code, so I hope it will stay in the C part. Alternatively, advice could be about Snes9x. I hope to write something working in following way: called at any time, it makes a copy of current state of memory, displays all tiles and their position/size in the rom, but doesn't stop the emulation.
Right now, I don't know how I'll go about it, maybe I try to mess with gtk.
Of course, I'm looking for a fairly simple and clean solution, so dosbox/wine advices don't count.

[Nach]

I'd just stick something in anywhere that processes ZSNES' internal arrays. However ZSNES internal arrays are processed in assembly, but that doesn't mean your code can't be C, it's an array like any other.

[creaothceann]

what parts of the code should I be looking at if I was trying to add a tile viewer?

I'd add it right after the current frame has been rendered (optionally only every x frames).

Don't know where that would be in the code, though.

[Nach]

what parts of the code should I be looking at if I was trying to add a tile viewer?

I'd add it right after the current frame has been rendered (optionally only every x frames).

Don't know where that would be in the code, though.

Well, logically, one would look at screenshot or movie dumping code to see when those get called, and do something around there.