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 XXXI.  Character Orientation input.

MSB                                                                                                                                                               LSB

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

5                                                           16                                                                 8                                 = 0x5208

0                                                                                               = 0x0000

Y X

0                                                                                               = 0x0000

5.1.1.4.5  Fill Color element input.  The CGM implementation for NITFS shall provide the capability to input and interpret the Fill Color element using the following format.  The Fill Color command is used to support the filled-area primitives.  RGB values are each specified using a single byte, and the last byte of the command shall be a null byte.

TABLE XXXII.  Fill Color input.

5                                                           23                                                                 3                                 = 0x52E3

RED                                                                               GREEN BLUE                                                                                    0

5.1.1.4.6  Interior Style element input.  The CGM implementation for NITFS shall provide the capability to input and interpret the Interior Style element using the following format.  Filled-area primitives must support the Interior_Style parameter for solid (1), hatch (3) and empty (4).

TABLE XXXIII.  Interior Style input.

INTERIOR_STYLE

5.1.1.4.6.1  Hatch Index input.  The CGM implementation for NITFS shall provide the capability to input and interpret the Hatch Index element using the following format.  The Hatch Index command is used to support the primitive filled-area styles:  horizontal (1), vertical (2), positive slope (3), negative slope (4), horizontal/vertical crosshatch (5) and positive/negative slope cross (6).

TABLE XXXIII(A).  Hatch Index input.

HATCH_INDEX

5.1.1.4.7  Edge Visibility element input.  The CGM implementation for NITFS shall provide the capability to input and interpret the Edge Visibility element using the following format.  The edge visibility command (0 = off, 1 = on).

TABLE XXXIV.  Edge Visibility input.

EDGE_VISIBILITY

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