HP L 5 Color Modes, Encoding by Pixel, C4 c3 c2 c1, Planar Encoding Pixel Encoding, Direct

Encoding by Pixel

When encoding by pixel, each pixel is fully specified before any bits are sent for the next pixel. For example, if four bits are needed to define a pixel, then every group of four bits in the data stream defines a pixel. The underlined (c4 . . . c1) group below defines the second pixel in the first row.

?*b#W	row 1	b4	b3	b2	b1	c4 c3 c2 c1 . . .
?*b#W	row 2	b4	b3	b2	b1	. . .

The table below shows the four PCL options for selecting colors and encoding color raster data.

	Planar Encoding	Pixel Encoding
Indexed	Indexed planar	Indexed pixel
Selection
Direct	Direct planar	Direct pixel
Selection

Color Modes

There are four PCL 5 color modes:

•Black and White mode

•Simple Color mode

•PCL Imaging mode

•HP-GL/2 Imaging mode

All four modes create a palette. The palettes used in the Black and White mode and Simple Color mode are not modifiable. You can, however, modify the palettes in the PCL Imaging and HP-GL/2 Imaging modes.

You can use more than one mode on the same page. For example, you could enter the Simple Color mode to print a headline and a bar chart, PCL Imaging mode to print a raster photograph, and Black and White mode to print some body text. Each mode is described in more detail in Appendix B, “Using Color Modes.”

EN Color Printing Overview (Color LaserJet, 5, 5M, DeskJet) A-7