HP PCL/PJL reference (PCL 5 Color) - Technical Reference Manual
B-14 Using Color Modes (Color LaserJet, 5, 5M, DeskJet) EN
A value of 0 defaults the black and white reference values for primary
#1 according to the color space.
Byte 4 (Number of Bits for Primary #2)
This byte is ignored in pixel encoding modes 0 and 1, but affects the
black and white references in device-dependent color spaces. In
Device RGB, the black reference for primary #2 is set to 0, and the
white reference is set to 2
n
– 1, where n is the number of bits for
primary #2. These references are reversed in Device CMY color
space.
• In pixel encoding mode 2, this byte is ignored except in Device
RGB and Device CMY color spaces, where it designates the
number of data bits needed to specify primary #2, as well as
the number of data planes to be sent for primary #2.
• In pixel encoding mode 3, this byte designates the number of
data bits needed to specify primary #2.
A value of 0 defaults the black and white reference values for primary
#2 according to the color space.
Byte 5 (Number of Bits for Primary #3)
This byte is ignored in pixel encoding modes 0 and 1, but affects the
black and white references in device-dependent color spaces. In
Device RGB, the black reference for primary #3 is set to 0, and the
white reference is set 2
n
– 1, where n is the number of bits for primary
#3. These references are reversed in Device CMY space.
• In pixel encoding mode 2, this byte is ignored except in Device
RGB and Device CMY color space, where it designates the
number of data bits needed to specify primary #3, as well as
the number of data planes to be sent for primary #3.
• In pixel encoding mode 3, this byte designates the number of
data bits needed to specify primary #3.
A value of 0 defaults the black and white reference values for primary
#3 according to the color space.