Halftoning is always device specific. The Print Server executes the halftoning. In this manual, halftoning always refers to ’Type3’ halftoning. The following halftone cells are available:
|
Name |
Description |
|---|---|
|
/Halftone85lpi_4 |
85 lpi for 600x600 dpi resolution |
|
/Halftone106lpi_4 |
106 lpi for 600x600 dpi resolution This is a default option. |
|
/Halftone106lpi_2 |
106 lpi for 600x1200 dpi resolution |
|
/Halftone125lpi_4 |
125 lpi for 600x600 dpi resolution |
|
/Halftone125lpi_2 |
125 lpi for 600x1200 dpi resolution This is a default option. |
|
/Halftone141lpi_4 |
141 lpi for 600x1200 dpi resolution |
|
/Halftone180lpi_2 |
180 lpi for 600x1200 dpi resolution |
|
/Halftone85lpi_2 |
85 lpi for 600x1200 dpi resolution |
Note that using 1200 dpi halftone cells in combination with 600 dpi HWResolution can result in a poor print quality. The PostScript file must use the appropriate dither matrices for each resolution.
Example to switch to 125 lpi
% Overwrite 1200 dpi default halftone with the 125lpi
/DefaultBWHalftone1200
/Halftone125lpi_2 /Halftone findresource
/Halftone defineresource pop
% Overwrite 600 dpi default halftone with the 125lpi
/DefaultBWHalftone600
/Halftone125lpi_4 /Halftone findresource
/Halftone defineresource pop
% Activation is done by setpagedevice
<<>> setpagedevice
Use parameter /HWResolution to specify the bitmap resolutions. Changing the HWResolution pagedevice parameter changes the resolution of the page contents during rasterising. The resolution is set per job. The default settings in the Settings Editor are used.
/HWResolution [600 600]
/HWResolution [600 1200]