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.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18 - 19 - 20 - 21 - 22 - 23 - 24 - 25 - 26 - 27 - 28 - 29 - 30 - 31 - 32 - 33 - 34 - 35 - 36 - 37 - 38 - 39 - 40 - 41 - 42 - 43 - 44 - 45 - 46 - 47 - 48 - 49 - 50 - 51 - 52 - 53 - 54 - 55 - 56 - 57 - 58 - 59 - 60 - 61 - 62 - 63 - 64 - 65 - 66 - 67 - 68 - 69 - 70 - 71 - 72 - 73 - 74 - 75 - 76

MIL-STD-23O1A

TABLE LXXIII.  Metafile Description nonpadded, short form output.

MSB                                                                                                                                                                          LSB

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

TABLE LXXIV.  Metafile Description padded, long form output.

MSB                                                                                                                                                               LSB

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

1                                                            2                                                                 31                                = Ox1O5F

parameter list length

length = n (even)                                                                          C1

C2                                                                                       .

.

Cn                                                                                       O

TABLE LXXV.  Metafile Description nonpadded, long form output.

MSB                                                                                                                                                               LSB

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

1                                                            2                                                                 31                                = Ox1O5F

parameter list length

length = n (Odd)                                                                          C1

C2                                                                                       .

.

C(n-1)                                                                                  Cn

5.1.2.2.3  Metafile Element List element output.  The CGM implementation for NITFS shall provide the capability to generate and output the Metafile Element List element using the following format.  The subset of commands from which metafile elements are chosen is specified by the CGM defined as "Drawing Plus Control Set" when the second parameter is one.

TABLE LXXVI.  Metafile Element List output.

MSB                                                                                                                                                               LSB

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

= Ox1166

= OxOOO1

= OxFFFF

= OxOOO1

5.1.2.2.4  Font List element output.  The CGM implementation for NITFS shall provide the capability to generate and output the Font List element using the following formats.  The first font name defined in the list is of length x with the font name given as the character string C1, C2, Cx and assigned to index 1.  The last font name defined in the list is of length z with the font name given as the character string C1, C2, ... Cz and assigned to index N.  Named fonts are selected by using the Text Font Index element.

27