-- File:        AlienImage_AlienUserImage.cdl
-- Created:     23/03/93
-- Author:      BBL,JLF
--
-- Modified:    DCB (20-OCT-98)
--              Define ToImage()/FromName() as deferred.
--
---Copyright:   Matravision 1993

deferred class AlienUserImage from AlienImage inherits AlienImage

        ---Version: 0.0

        ---Purpose: This class defines an Alien user image.
        -- Alien Image is X11 .xwd image or SGI .rgb image for examples

        ---Keywords:
        ---Warning:
        ---References:

uses
        Image   from Image,
        File    from OSD

raises
        TypeMismatch    from Standard

is
        Initialize ;

        Read ( me : in out mutable ; afile : in out File from OSD )
          returns Boolean from Standard is deferred;
        ---Level: Public
        ---Purpose: Read content of a  UserAlienImage object from a file .
        --         Returns True if sucess .

        Read ( me : in out mutable ; afile : in CString from Standard )
          returns Boolean from Standard ;
        ---Level: Public
        ---Purpose: Read content of a UserAlienImage object from a file .
        --          Returns True if file is a AlienImage file .

        Write ( me : in immutable ; afile : in out File from OSD )
          returns Boolean from Standard is deferred ;
        ---Level: Public
        ---Purpose: Write content of a UserAlienImage object to a file .

        Write ( me : in immutable ; afile : in CString from Standard )
          returns Boolean from Standard ;
        ---Level: Public
        ---Purpose: Write content of a UserAlienImage object to a file .

        ToImage ( me : in  immutable )
        returns mutable Image from Image 
        raises TypeMismatch from Standard
        is deferred;
        ---Level: Public
        ---Purpose : convert a AidaAlienData object to a Image object.

        FromImage ( me : in out mutable ; anImage : in Image from Image )
        raises TypeMismatch from Standard
        is deferred;
        ---Level: Public
        ---Purpose : convert a Image object to a AidaAlienData object.

end AlienUserImage;