Function getGifMetadata

docs/app/js/sanddance-app.js:57795–57804

(binaryData)

    };
}
function getGifMetadata(binaryData) {
    var dataView = toDataView(binaryData);
    var isGif = dataView.byteLength >= 10 && dataView.getUint32(0, BIG_ENDIAN) === 0x47494638;
    if (!isGif) return null;
    return {
        mimeType: "image/gif",
        width: dataView.getUint16(6, LITTLE_ENDIAN),
        height: dataView.getUint16(8, LITTLE_ENDIAN)
    };
}
function getBmpMetadata(binaryData) {
    var dataView = toDataView(binaryData);
    var isBmp = dataView.byteLength >= 14 && dataView.getUint16(0, BIG_ENDIAN) === 0x424d && dataView.getUint32(2, LITTLE_ENDIAN) === dataView.byteLength;