Generate tiles from different zoomlevels, when they are not loaded yet. This should be quite easy. Either scale them up 200%, and take a quarter, or scale them down 50% and combine four. It might be necessary to put this in a separate thread, and give it a queue of tiles. (Then you only need to do the scaling up once ISO four times).
unsanded
commented
8 years ago
Generate tiles from different zoomlevels, when they are not loaded yet. This should be quite easy. Either scale them up 200%, and take a quarter, or scale them down 50% and combine four. It might be necessary to put this in a separate thread, and give it a queue of tiles. (Then you only need to do the scaling up once ISO four times).