Software for the generation and manipulation of images is described. A standard approach has been kept in mind. Raster functions defined in the ISO Computer Graphics Interface (CGI) proposal have been implemented and some extensions are suggested. © 1989.
Cossu, R., Ercoli, M., & Moltedo, L. (1989). An extension of CGI functions for generation and manipulation of raster images. Computers and Graphics, 13(1), 39–48. https://doi.org/10.1016/0097-8493(89)90034-4