HP LaserJet 4100 HP PCL/PJL reference (PCL 5 Printer Language) - Technical Ref - Page 236

z screen_type- Selects the types of screening as follows: • 0- No screening • 1- Shaded fill • 2- HP-GL/2 User-defined raster fill (RF command) • 21- Predefined PCL cross-hatch patterns • 22- PCL user-defined raster fill (RF command) • Option1, Option2- The definition of these optional parameters depends on the screen type selected. The following table lists the options available for each fill type. Table 22-21 Screen/Type Description Option1 Option2 1 Shaded Fill % Shading (0 to 100) Ignored 2 HP-GL/2 Pattern Index 0-Pen 1 User-defined 1-Current Pen Raster Fill 21 PCL Cross-hatch 1 - 6 Ignored 22 PCL User-defined Pattern ID Ignored Pattern Fill For Type 1, specify the shading percentage using a number from 0 to 100. For example, to print vectors that are shaded 15%, specify (SV1,15;). For Type 2, option1 specifies the index number of the fill pattern created using the RF (Raster Fill Definition) command. Option2 specifies whether the pattern should be printed in the color of pen number 1 (option2 = 0 parameter) or the current pen (option2 = 1 parameter). The selected pen is applied to the 1's pixels in the raster pattern. For Type 21, the option1 parameter selects one of the six predefined PCL cross-hatch patterns using a value between 1 and 6. Refer to the FT command for an illustration of the six different patterns and their corresponding parameter numbers. 22-40 The Line and Fill Attributes Group EN