example_tool.py

import argparse
import webbrowser

import neuroglancer
import neuroglancer.cli

if __name__ == "__main__":
    ap = argparse.ArgumentParser()
    neuroglancer.cli.add_server_arguments(ap)
    args = ap.parse_args()
    neuroglancer.cli.handle_server_arguments(args)

    viewer = neuroglancer.Viewer()
    with viewer.txn() as s:
        s.layers["image"] = neuroglancer.ImageLayer(
            source="precomputed://gs://neuroglancer-public-data/flyem_fib-25/image",
            tool_bindings={
                "A": neuroglancer.ShaderControlTool(control="normalized"),
                "B": neuroglancer.OpacityTool(),
            },
        )

    print(viewer)
    webbrowser.open_new(viewer.get_viewer_url())