HP L 5 Format, Number of Planes, Height and Width, Data Bytes, Byte Value Value Description

Format

This byte should be set to 0.

Number of Planes

This byte designates how many dither matrices are specified by the command. The command is ignored and the data discarded for any value other than 1 or 3.

Byte Value Value Description

1One matrix applied to all primaries

3Each primary has a separate matrix

Height and Width

These bytes designate the size of the dither matrix in pixels. For example, a value of four for height and six for width produces a dither cell that is four pixels wide by six pixels high. Values must be non-zero and sized so the matrix contains no more than 32767 bytes. Otherwise, the command is ignored and the data discarded. The minimum dither matrix size is 1 x 1.

Data Bytes

After specifying the height and width of the cell, data bytes are sent row-by-row (row-major order). Each data byte contains the normalized probabilities, ranging from 0 to 255, of one cell.

For example, a 2 x 2 cell could have no pixels print for RGB values of 205 through 255, one pixel for values of 153 through 204, two pixels from 101 through 152, three pixels for 49 through 100, and all four pixels between 0 and 48 (see the illustration below, which represents a halftone cell for one of the primary colors—note that the color data is in RGB values).

EN Modifying Output Color (Color LaserJet, 5, 5M, DeskJet) D-9