Printronix ThermaLine Series manual Uncompressed and Packed Bits Compression

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.

Commands 4±7