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EPL Commands
GW
110
14245L-003 Rev. A EPL Programming Guide 12/16/13
GW
Direct Graphic Write
Description Use this command to load binary graphic data directly into the Image Buffer
memory for immediate printing. The printer does not store graphic data sent directly to the
image buffer.
The graphic data is lost when the image has finished printing, power is removed or the printer
is reset. Commands that size (Q and q) or clear (N and M) the image buffer will also remove
graphic image data.
Syntax GWp
1
,p
2
,p
3
,p
4
,DATA
Parameters This table identifies the parameters for this format:
Parameters Details
p
1
= Horizontal start
position
Horizontal start position (X) in dots.
p
2
= Vertical start position
Vertical start position (Y) in dots.
p
3
= Width of graphic
Width of graphic in bytes. Eight (8) dots = one (1) byte of
data.
p
4
= Length of graphic
Length of graphic in dots (or print lines)
DATA
Raw binary data without graphic file formatting. Data must
be in bytes. Multiply the width in bytes (p
3
) by the number of
print lines (p
4
) for the total amount of graphic data. The
printer automatically calculates the exact size of the data
block based upon this formu
la.