MIL-STD-2301 Computer Graphics Metafile Cgm Implementation Standard For The National Imagery Transmission Format StandardThis standard establishes the requirements necessary to implement Computer Graphics Metafiles CGM used for the representation of symbol graphics in the National Imagery Transmission Format Standard NITFS.

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MIL-STD-2301A

TABLE XXI.  Font List nonpadded, short form input.

MSB                                                                                                                                                                          LSB

15       14      13        12        11        10         9          8          7          6          5          4          3          2          1          0

1                13                                                     parameter list length length = x                                                                                     C1

C2

C(x-1) Cx                                                                                    Length = z

C1                                                                                           C2

Cz

TABLE XXII.  Font List padded, long form input.

MSB                                                                                                                                                               LSB

15        14      13       12       11       10        9         8         7         6          5         4         3          2       1         0

1                                                           13                                                               31                                = 0x11BF

parameter list length

length = x                                                                               C1

C2

C(x-1)                                                                                  Cx length = z                                                                                C1

C2

Cz                                                                                       0

TABLE XXIII.  Font List nonpadded, long form input.

MSB                                                                                                                                                               LSB

15        14      13       12       11       10        9         8         7         6          5         4         3          2       1         0

1                                                           13                                                               31                                = 0x11BF

parameter list length

length = n                                                                               C1

C2

C(x-1) Cx                                                                               Length = z

C1                                                                                     C2

Cz

5.1.1.3  Picture Descriptor elements.  The Picture Descriptor elements set the interpretation modes of the attribute elements.

5.1.1.3.1  Color Selection Mode element input.  The CGM implementation for NITFS shall provide the capability to input and interpret the Color Selection Mode element using the following format.

TABLE XXIV.  Color Selection Mode input.

MSB                                                                                                                                                               LSB

15        14      13       12       11       10        9         8         7         6          5         4         3          2       1         0

2                                                            2                                                                  2                                 = 0x2042

1                                                                                               = 0x0001

11