Function getImageType

docs/app/js/sanddance-app.js:57515–57519

(image)

    }
}
function getImageType(image) {
    var format = getImageTypeOrNull(image);
    if (!format) throw new Error("Not an image");
    return format;
}
function getImageData(image) {
    switch(getImageType(image)){
        case "data":