HP L 5 manual Byte 2 Number of Bits per Index, R7-r0 G7-g0

MODE 3: DIRECT BY PIXEL

This mode specifies a pixel as three, eight-bit components, thus the name 24-bit direct color. Assuming the RGB color space with the mandatory eight bits per component, the underlined bytes below define the first pixel of row two.

?*b#W	row 1	r7–r0	g7–g0	b7–b0 . . .
?*b#W	row 2	r7–r0	g7–g0	b7–b0 . . .
?*b#W	row 3	r7–r0	g7–g0	b7–b0 . . .

Example:

In the example below the data in the row transfer commands are shown as two-digit hexadecimal numbers for clarity, even though the actual data would be byte-aligned binary data. The example is for a one-pixel-wide image.

?*v6W	00 03 00 08 08 08	Binary Data for CID command
		represented in hexadecimal.
		This command sets the color
		space to RGB, the PEM to
		Direct by Pixel. The palette size
		is ignored. The last three bytes
		must be 8.
?*r1A		Start raster
?*b3W	45 06 30	The three bytes specify a single
		pixel. The first sets 45 as the red

component’s value, the second sets the green value to 06, and the third sets the blue value to 30.

Byte 2 (Number of Bits per Index)

This command creates a palette regardless of the PEM chosen. This byte determines the size of the created palette. The palette size is two raised to the power of n (2n), where n is the bits per index.

•In the Indexed-by-Plane PEM, where the raster data is interpreted as palette indices, this value determines the number of planes required per row.

EN Using Color Modes 2-11