Reads only header information from image stored in file to get basic information and not decode the whole image.
ReadHeader(f as FileSystemItem) as RawBitmapDescription
Parameters
- f
- The FileSystemItem to open the image from.
Returns
- RawBitmapDescription
- Instance of RawBitmapDescription or nil if there was error. If getting nil then you can check the last error code and ErrorMessage also to get more detail.