An open-source, web-based viewer for zoomable images, implemented in pure JavaScript.
.source
of a TiledImage to see if that gives you the info you need. That will be a TileSource (or a TileSource subclass), and what data it has depend on how it was created.
viewer.currentOverlays
which is an array of OpenSeadragon.Overlay objects.
OpenSeadragon({
...
tileSources: "/example-images/highsmith/highsmith.dzi",
...
});
// Load the new 'best' tile
if ( best ) {
loadTile( tiledImage, best, currentTime );
}
coverage: {}, // A '3d' dictionary [level][x][y] --> Boolean.
tiledImage.js:128