Yeah, I'm a bit confused about what this is for. Any icons common to an entire file type should be cached in RAM already, so I the only thing I can think of wou

Yeah, I'm a bit confused about what this is for. Any icons common to an entire file type should be cached in RAM already, so I the only thing I can think of would be file-specific icons. But I expect most of those would be thumbnail images, which would not be amenable to a concise vector representation.