HP L5 manual HP LaserJet 4 Printer, Raster Graphics Adaptive Compression Iiip

Raster Graphics

Adaptive

Compression (IIIP)

Adaptive compression was added to the PCL language with the introduction of the HP LaserJet IIIP printer. Adaptive compression (or method 5 as it is referred to) is a method for compressing raster data using the raster Set Compression Method command (parameter value 5). (Refer to the Set Compression Method command in the PCL 5 Printer Language Technical Reference manual for detailed information on using this compression technique.) Also, refer to Chapter 4 in this document, “Raster Graphics Adaptive Compression (Method 5)” for additional information.

HP LaserJet 4 Printer

Several new PCL features were added to the PCL 5 language with the release of the HP LaserJet 4 printer. These new features are summarized in Table 2-3. Most of these features are described in the revised PCL 5 Printer Language Technical Reference Manual (part number

5961-0509). (This revised technical reference manual is supplied as part of the Technical Reference Documentation Package which can be obtained by ordering part number 5961-0601.) In addition, there are some additional differences for the HP LaserJet 4 printer that are not covered in the technical reference manual but are described below.

Note The HP LaserJet 4M printer, in addition to PCL, contains PostScript and a LocalTalk I/O for printing in the Macintosh environment. PCL operation and the PCL internal fonts for this printer are identical to the HP LaserJet 4 printer. Thus, for PCL information for the HP LaserJet 4M printer, refer to the HP LaserJet 4 printer features.

2-4 Printer-Specific Differences