IRAF Newsletter -- Number 14 -- April 1998

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Client Display Library--CDL

A new library is now available that will allow C or Fortran host programs to display a image or do overlay graphics using image servers such as Ximtool , SAOtng , and SAOimage . The Client Display Library (CDL) provides all the functionality found in standard IRAF tasks such as display and tvmark in a form which can be used by any host program. It may be used from IMFORT programs or can be used by any application needing to display or mark images. Features include:

Image Display:

Overlay Graphics - Marker Primitives:

Newly added features:

The CDL runs on all supported Unix platforms with any of the currently used image display servers and includes full documentation and sample tasks in both C and Fortran.

The CDL and a readme is available as a compressed tar file of sources from

It will also be available from the IRAF mirror sites discussed elsewhere in this Newsletter. Additional work is planned to enhance the interface and user suggestions are always welcome.

This software was developed under the Open IRAF initiative which is funded by the NASA Astrophysics Data Program (ADP).

Mike Fitzpatrick

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IRAF Group, National Optical Astronomy Observatories, P.O. Box 26732, Tucson, AZ 85726, Phone: (520) 318-8160, FAX: (520) 318-8360, Email

Posted: 07May1998