class FileSignature
BMP
PNG
JPEG_RAW
JPEG_JFIF
JPEG_EXIF
JPEG_UNKNOWN
GIF87a
GIF89a
TIFF_BIG_ENDIAN
TIFF_LITTLE_ENDIAN
WEBP
XML
HEIC
MAX_SIGNATURE_LENGTH
static val MAX_SIGNATURE_LENGTH: Int
readSignature
static fun readSignature(fileHeader: ByteArray!): FileSignature!