Function:     GDI_CINFO

Purpose:      Obtains info about the color tables of the display.

Category:     DISPLAY

File:         gdilib.c

Author:       K.G. Begeman

Use:          INTEGER GDI_CINFO( GDI_ID,        Input     INTEGER
                                 MINCOL,        Output    INTEGER
                                 MAXCOL,        Output    INTEGER
                                 NCOLORS,       Output    INTEGER
                                 BLANK )        Output    INTEGER

              GDI_CINFO      Returns zero on success, negative on error.
              GDI_ID         Display id as returned by GDI_OPEN.
              MINCOL         Minimum display value for which a
                             color can be assigned.
              MAXCOL         Maximum display value for which a
                             color can be assigned.
              NCOLORS        Number of colors (MAXCOL - MINCOL + 1).
              BLANK          Display value reserved for undefined
                             data.

Updates:      Dec 11, 1990: KGB Document created.