HP L 5 manual PEM 1 Indexed by Pixel

PEM 1: INDEXED BY PIXEL

In this mode, each pixel in a row is fully specified before any bits are sent for the next pixel. The bits for each pixel form a palette index number. Assuming four bits per index, the underlined block below is the palette index for pixel two of row one (i1 is the least significant bit).

?*b#W row 1 i4 i3 i2 i1 i4 i3 i2 i1 . . .

?*b#W row 2 i4 i3 i2 i1 i4 i3 i2 i1 . . .

?*b#W row 3 i4 i3 i2 i1 i4 i3 i2 i1 . . .

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 two-pixel-wide image.

?*v6W 00 01 04 08 08 08	Binary Data for the CID
	command represented in
	hexadecimal. This command
	sets the color space to RGB, the
	PEM to Indexed by Pixel, the
	palette size to 16 (24). The last
	three bytes are ignored.
?*r1A	Start raster
?*b1W45	The most significant nibble
	selects palette entry 4 for the
	first pixel. The second pixel is set
	to index 5. Move to next row.
?*b1W6A	The first pixel is index 6, the
	second pixel is index 10. Move to
	the next row.
?*b1W03	The first pixel is index 0, the
	second pixel is index 3.

EN Using Color Modes 2-9