Printronix ThermaLine Series - Manual (Page 51)

4–7 Commands
NOTE: Executing a form or calling a logo will access the default printer
memory module automatically if the object is not found in memory.
Uncompressed and Packed Bits Compression
PGL logos support uncompressed and packed bits compression methods.
CCITT and LZR (used for color) compression methods are not supported.
Refer to your application’s documentation about TIFF files.
Character Position.Dot Position (CP.DP) Format
The CP.DP format is a special parameter available with the IGP/PGL
commands. CP.DP format allows two elements plotted at nearly the same
character location to be offset to eliminate overlapping. Specifying starting
and ending rows and columns is its most frequent use.
Each character location is a cell. Each cell is a grid 12 dot rows high by 6 dot
columns wide (printing at 6 lpi and 10 cpi). The CP.DP format allows a
character cell position (CP) and a specific dot position (DP) within the cell to
be identified as shown in Figure 4–1. The DP portion of the CP.DP format
specifies a location down (in reference to rows) and to the right (in reference
to columns) within the character cell position.
For example, refer to Figure 4–1. Suppose a line runs along character
position column 13 (CP = 13). At the same time, an alphanumeric string
must begin in column 13. With CP.DP format, the alphanumeric string can be
offset 2 dot positions (DP = 2) in column 13 to avoid overlap. Specify 13.2
(CP = 13, DP= .2) for the starting column of the alphanumeric string.
Similarly, to place a horizontal line 8 dot rows beneath another horizontal
line in character row position 11, specify row 11 for one line and row 11.8
for the other line.