HP L 5 Long Form of CID Command Configure Image Data, Device RGB Long Form, Byte 15 msb Lsb

Long Form of CID Command (Configure

Image Data)

In addition to the short form, there is also a long form of the CID command for each color space. In device-independent color spaces, the long form can specify primaries other than the defaults provided by the short form. For example, a Sony Trinitron RGB primary base can be selected for Colorimetric RGB instead of the default non-linear SMPTE RGB primaries.

Device RGB (Long Form)

The long form for the Device RGB color space (value field 18) provides explicit entry of black and white references (range is –32767 to 32767). Black and white references are used in the direct pixel encoding modes (2,3) to set relative limits for raster data; they are also used when specifying the primary components of new palette entries (?*v#A, ?*v#B, ?*v#C). Black and white references have no effect on CID default palette colors. The reference values are specified as 16-bit signed integers (sint16).

Note	The short form for the Device RGB color space defaults each
					n
	primary's black reference to 0 and the white reference to 2–1, where
	n is the number of bits for that primary.
	Byte	15 (msb)	8	7	(lsb) 0	Byte
	0	Color space		Pixel encoding mode		1
	2	Bits per index		Bits per primary #1		3
	4	Bits per primary #2		Bits per primary #3		5
	6	White reference for primary #1 (sint 16)				7
	8	White reference for primary #2 (sint 16)				9
	10	White reference for primary #3 (sint 16)				11
	12	Black reference for primary #1 (sint16)				13
	14	Black reference for primary #2 (sint16)				15
	16	Black reference for primary #3 (sint16)				17

EN Using Color Modes (Color LaserJet, 5, 5M, DeskJet) B-17