Don't want a pre-render, want it to be rendered on the fly on device with no internet connection. Think Android phone or Windows tablet on 2G network at best so

Don't want a pre-render, want it to be rendered on the fly on device with no internet connection. Think Android phone or Windows tablet on 2G network at best so bandwidth is not really there. We basically need a "tilesource" for XYZ PNG based tiles that is fed on the fly from vector tiles and is cross platform enough that it relies only on something like Skia.