HP PCL/PJL reference (PCL 5 Color) - Technical Reference Manual

7-22 Color Vector Graphics (HP-GL/2) EN
PP, Pixel Placement Command
The Pixel Placement (PP) command controls how pixels are placed
on the layout grid during polygon fills. The two pixel placement modes
are grid intersection or grid centered.
PP [mode;]
• mode
When the printer is set to grid-centered mode (mode 1), portions of a
polygon that are zero height or zero width are not rendered. When the
printer is set to grid intersection mode (mode 0), portions that are
zero height or width are rendered as lines. Portions that are both zero
height and width are rendered as dots.
This command affects only HP-GL/2 polygons; it has no effect on
characters, rules, or raster graphics. This command can be invoked
multiple times during a page; it has no effect except to switch the
model used for imaging.
This command is the HP-GL/2 version of the PCL Pixel Placement
command. Whatever mode is selected, using the HP-GL/2 PP
command also applies to PCL operation. Likewise the PCL Pixel
Placement command also affects HP-GL/2 pixel placement.
Note Microsoft Windows fills polygons based on the grid- centered method.
This command determines how pixels will be placed for both HP-GL/2
and PCL operation.
The PP command is not defaulted by an IN command.
Parameter Format Functional
Range
Parameter
Default
mode clamped integer 0 or 1 0 (grid
intersection)
0 grid intersection; device draws pixels centered at grid
intersections (see Figure 7-1).
1 grid centered; device draws pixels centered inside the
boxes created by the grid (see Figure 7-1).