This module contains methods that Locana uses to look at the content of jpeg and gif images.

Returns true if the content of the buffer is a jpeg file.

Returns true if the content of the buffer is a gif file.

Returns true if the content of the buffer is a xpm file.

Returns the w, h of the image stored in filename if the file is a valid gif or jpeg. Otherwise returns nil.

Hex dumps the string and adds a line feed every lf_count characters. string - a binary string containing the data of jpeg or gif image. lf_count - how many characters to print before printing a line feed.