// Gets information about supported scan sources of opened SANE device.
function getSupportedSaneScanSources(saneDevice) {
    try {
        console.log("SANE device: " + saneDevice.get_DeviceName());
        // if SANE device is not opened
        if (!saneDevice.get_IsOpened()) {
            console.log("Device is not opened. Please open device.");
            return;
        }
        // get information about supported scan sources of SANE device
        var saneScanSources = saneDevice.getSupportedSaneScanSources();
        console.log("Supported scan sources:");
        // for each supported scan source
        for (var i = 0; i < saneScanSources.length; i++) {
            // output information about scan source
            console.log("- " + saneScanSources[i]);
        }
    }
    catch (ex) {
        alert(ex);
    }
}